30 results on '"Ramkumar, M. Siva"'
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2. A current controller for wind turbine generator with permanent magnet synchronous includes matrix converter being implemented to an adjustable speed VAWT using SVPWM.
- Author
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Ramkumar, M. Siva, Kumar, V. Dinesh, Tamilselvan, V., Subramanian, S. Siva, and Sivaramkrishnan, M.
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PERMANENT magnet generators , *MATRIX converters , *INDUCTION generators , *TURBINE generators , *RENEWABLE energy sources , *WIND turbines , *WIND power - Abstract
Wind energy conversions are growing rapidly as a renewable energy source. A new method of interconnected wind power production that utilizes a doubly fed induction generator coupled to a quality Analyst matrix converter is described in this study. The aims of this project include Doubly-fed induction generator modeling and simulation The rotor current is controlled via a space vector modulated matrix converter. This strategy is aimed directly at the converter-based rotor current regulation. The system enhances the ideal speed tracking for wind energy collection to maximize energy extraction, while also implementing power-control strategies that apply to the RST regulator. The findings obtained for different operating points are evaluated, and they indicate the excellent control capabilities of the system. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
3. Design and implementation of cascaded Z-source matrix converters.
- Author
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Vivekanandan, S. and Ramkumar, M. Siva
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MATRIX converters , *ELECTRIC current rectifiers , *PULSE width modulation , *CASCADE connections , *POWER semiconductors , *SEMICONDUCTOR switches - Abstract
The popular Z-source DC connection was extended by the Z-Source network, which was first designed to enhance the power output of power semiconductor inverters. The following research article covers how the aforementioned concept is taken further, using 3 indirect matrix converters. This is done via an ultra-sparse matrix architecture that is characterised by a low number of semiconductor switches. The Z-source network is positioned on the positive or negative rail between both the three-switch input rectifier stage and the six-switch output inverter stage. A short on-and-off condition causes the voltage to increase. Higher boosting capacity of the converter with minimal switching losses is achieved by using an ideal pulse width modulation strategy. A comparison was made between matrix converters that use Z-source networks (Z may be an unbalanced or balanced one), one of which uses a series network and the other a typical cascade network. The series Z-source matrix converter's capabilities include reductions in inrush current and the Z-source capacitor's voltage. The same conclusion is further supported by the rapid Fourier transformation study of the output current, which indicates that perhaps the series Z-source converter is better than the cascaded one. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
- View/download PDF
4. A Bridgeless LUO Converter with Glowworm Swarm Optimized Tuned PI Controller for Electrical Applications.
- Author
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Sivaramkrishnan, M., Ramkumar, M. Siva, Subramanian S, Siva, and Ladu, Nyagong Santino David
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POWER density , *RELUCTANCE motors , *ACTINIC flux , *SYNCHRONOUS electric motors , *MACHINE tools - Abstract
The synchronous reluctance motor (Sync-RM) is known for its higher reliability, faster dynamic response, higher efficiency, higher speed range, higher power density, and higher torque per ampere. Consequently, the scope of research into emerging Sync-RMs drive system has been extended. For different kinds of mechanical and electrical applications, motors are important components of any machine or tool. There are several types of motors available for various kinds of industrial applications, but the benefits of Sync-RM in medium- and low-power applications have eventually been very efficient compared to other motor types, regarding the factors such as high flux density per unit volume, high efficiency, requirements of low maintenance, and low electromagnetic obstruction. This research proposed a Sync-RM drive fed by a bridgeless LUO converter (BLLC) using the Glowworm Swarm Optimization (GSO) tuned proportional integral (PI) controller. High competence, higher power density, and a small structure of the motor drive are delivered by the PI-tuned converter. The output voltages are related to the Sync-RM motor of the proposed converter. Due to its minimum effort and modest development, the Sync-RM here is chosen for the drive. The proposed Sync-RM drive framework based on the LUO converter was evaluated by simulation using the Matlab/Simulink tool. [ABSTRACT FROM AUTHOR]
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- 2022
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5. Review and Evaluation of Power Devices and Semiconductor Materials Based on Si, SiC, and Ga-N.
- Author
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Ramkumar, M. Siva, Priya, R., Rajakumari, R. Felshiya, Valsalan, Prajoona, Chakravarthi, M. Kalyan, Latha, G. Charlyn Pushpa, Mathupriya, S., and Rajan, Kavitha
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POWER semiconductors , *SEMICONDUCTOR materials , *SEMICONDUCTOR devices , *ENERGY bands - Abstract
There is no reservation that semiconductor equipment distorted the world despite the fact of doing the practical experiments and also in research field. Researchers will communicate the process of semiconductor statistics with nearby pupils. In this work, diverse brand of semiconductor equipment was thrashed out with elementary properties and their distinctiveness. One type of semiconductor is differentiated based on energy band gap with an added type of semiconductor equipment. Semiconductor resources are the edifice block for the electrical and electronics component. This work makes an available apt generic argument of materials with the latest discussion and its impact of temperature on different materials, and it also reveals dissimilar parameters such as modern density, porch voltage value, transmission rate, and drain resistance value. Exceptional applications were discussed for divergent semiconductor materials. [ABSTRACT FROM AUTHOR]
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- 2022
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6. Review on Li-Ion Battery with Battery Management System in Electrical Vehicle.
- Author
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Ramkumar, M. Siva, Reddy, C. Subba Rami, Ramakrishnan, Agenya, Raja, K., Pushpa, S., Jose, S., and Jayakumar, Mani
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BATTERY management systems , *LITHIUM-ion batteries , *ELECTRIC batteries , *FOSSIL fuels - Abstract
In this paper, functions of BMS in elections vehicles are explained. The BMS consists of number of electronics components for monitoring and controlling the functions of batteries in electrical vehicles (EVs). Nowadays, the EV has more concentrations because it has number of merits like compact in size, does not require fossil fuel so it is environment friendly, and cost-saving. The main components in EV are batteries because batteries decide the performance and efficiency of EV. So, we should give more importance to batteries. Battery is controlled and monitored with the help of BMS. The BMS protects the battery and increases life time and efficiency due to charging discharging process. [ABSTRACT FROM AUTHOR]
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- 2022
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7. A DC - DC CONVERTER IN HYBRID SYMMETRICAL VOLTAGE MULTIPLIER CONCEPT.
- Author
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Selvan, S. Tamil, Ramkumar, M. Siva, Amudha, A., Balachander, K., and Kavitha, D.
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DC-to-DC converters , *VOLTAGE multipliers , *ELECTRIC current rectifiers , *ELECTRIC potential , *TRANSIENT responses (Electric circuits) , *DIRECT current circuits - Abstract
Voltage multiplier factor circuits area unit wide employed in several high-voltage/low-current applications this paper proposes a hybrid SVM (HSVM) for dc high-voltage applications. The multiplier factor is made by cascading a diode-bridge rectifier associated an (symmetrical voltage multiplier factor) SVM with diode-bridge rectifier because the initial stage of multiplier. The planned topology saves 2 high-voltage capacitors and needs just one secondary of HVT. Besides, it's lesser free fall and quicker transient response at start-up, compared with typical SVM. [ABSTRACT FROM AUTHOR]
- Published
- 2019
8. HIGH STEP-UP DC-DC CONVERTER BASED ON THREE-WINDING COUPLED INDUCTOR.
- Author
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Chitra, P., Ramkumar, M. Siva, Amudha, A., Balachander, K., and Emayavaramban, G.
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DC-to-DC converters , *ELECTRIC inductors , *VOLTAGE multipliers , *ELECTRIC potential , *HIGH voltages , *ELECTRIC power conversion - Abstract
during this paper a completely unique topology for top increase DCDC convertor is introduced. The convertor makes use of coupled electrical device and voltage multiplier factor cell to achieve the specified high increase voltage gain. the most benefits of the projected convertor square measure easy topology, high increase voltage gain, continuous input current, exercise the energy of the run inductance of the coupled electrical device, and utilizing only 1 active switch with reduced voltage stress. Reduced switch voltage stress leads to choice of switch with low on-resistance that improves the potency. Operational principles of the convertor in steady state square measure studied Associate in Nursingd an analytical approach is employed to realize voltage gain and switch voltage stress. [ABSTRACT FROM AUTHOR]
- Published
- 2019
9. A HIGH GAIN INPUT-PARALLEL OUTPUT-SERIES DC/DC CONVERTER WITH DUALCOUPLED-INDUCTORS.
- Author
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Kalimuthu, Ramkumar, M. Siva, Amudha, A., Balachander, K., and Krishnan, M. Sivaram
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DC-to-DC converters , *ELECTRIC inductors , *ELECTRIC currents , *ELECTRIC potential , *HIGH voltages , *LOW voltage systems , *ELECTRIC inductance , *ELECTRIC leakage - Abstract
This paper presents a very distinctive boost device with twin coupled-inductors and a voltage variety module. On the one hand, the primary windings of two coupled-inductors unit of measurement connected in parallel to share the input current and deate this ripple at the input. On the other hand, the projected device inherits the deserves of interleaved series-connected output capacitors for prime voltage gain, low output voltage ripple and low switch voltage stress. Moreover, the secondary sides of two coupled-inductors unit of measurement connected asynchronous to a regenerative device by a diode for extending the voltage gain and leveling the primary-parallel currents. In addition, the active switches unit of measurement turned on at zero-current and conjointly the reverse recovery disadvantage of diodes is relieved by low cost leak inductances of the coupled inductors. Besides, the energy of leak inductances is recycled. [ABSTRACT FROM AUTHOR]
- Published
- 2019
10. Single Stage ZVS PFC Circuits with Voltage Doubler.
- Author
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Ravivarman, G., Amudha, A., Ramkumar, M. Siva, and Mansoor, V. M.
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VOLTAGE , *SWITCHING circuits - Abstract
To improve the efficiency of the circuit and to minimize the THD to the negligible level voltage doubler circuit is interleaved with the single stage ZVS PFC converter circuits. The voltage doubler circuit is used to obtain UPF with low THD and increased performance efficiency of the converter by imposing the control over the current. The voltage doubler is charged by the converter operation at both negative and positive cycle. The converter circuit without voltage doubler was used in low power rating applications. But with the voltage doubler circuits high power ratings applications are possible. In this circuit the reduced switching loss of 6.7% is obtained with the THD 2.95[12]. The improvised performance efficiency with the input condition of 529.65W/31.21 A is 93.28%. [ABSTRACT FROM AUTHOR]
- Published
- 2021
11. ACHIEVING EFFICIENT AND SECURE DATA ACQUISITION FOR CLOUD-SUPPORTED INTERNET OF THINGS IN GRID CONNECTED SOLAR, WIND AND BATTERY SYSTEMS.
- Author
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Jayaprakash, M., Kavitha, D., Ramkumar, M. Siva, Balachander, K., and Krishnan, M. Sivaram
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DATA acquisition systems , *PHOTOVOLTAIC power systems , *WIND energy conversion systems , *BATTERY storage plants , *INTERNET of things , *CLOUD computing , *ENERGY consumption - Abstract
Lack of resources established in the present world is initiating everyone towards energy efficient technologies. Among all these resources, power is one which needs to be monitored and controlled as per the need since electricity consumption is increasing day-by day. In this project, we have described an effective implementation of an intelligent remote monitoring system for solar Photovoltaic (PV), Wind Energy Conversion System (WECS) and battery which are used in a greenhouse environment. The proposed system design can be installed in solar PV, WECS and battery in order to solve management problems, maintenance and shortens the mean time to repair. We have designed a smart remote monitoring system based on internet of thing for monitoring Solar PV, WECS and Battery. This system had incorporated remote monitoring for solar PV, WECS and battery through internet using host, network GPRS (Global Positioning Radio Service), embedded system gateway and Arduino. The result of our demonstration shows that the system can monitor store and manipulate data from solar PV, WECS and battery. Thus, the remote monitoring functions are realized in real-time. [ABSTRACT FROM AUTHOR]
- Published
- 2019
12. Leaf disease identification using machine learning models.
- Author
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SivaramKrishnan, M., Rajini, A. R., Logu, K., Kumarasamy, M., Jayaprakash, S., Gandhi, R. R. Rubia, and Ramkumar, M. Siva
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WEATHER forecasting , *MACHINE learning , *INSTRUCTIONAL systems , *MARKET share - Abstract
The field which encompasses predictive data analysis known as machine learning is quickly developing. Agricultural outcomes have been improved due to its suitability in automation, weather prediction, and share market applications. This article covers the latest on using machine learning to various fields in agriculture. The broad variety of machine learning methods applicable for said predictive modeling within important agricultural It is a great difficulty to be living in a densely populated nation, since one must meet the requirements of everyone. Agriculture ranks ahead of almost everything else when it comes to moving our nation forward. Machine learning makes the system adaptive to various environmental conditions by reducing human involvement. This article talks about the many algorithms for choosing the best for the application. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
13. Design and comparison of metaheuristic optimization learning approach PID controller for self-balancing bicycle.
- Author
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Manickavasagam, V. M., Prabakaran, M., Balamurugan, K., Vellimedu, Anirudh Srinivas, Sudhakar, M., Nayagam, V. Senthil, and Ramkumar, M. Siva
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PID controllers , *ANT algorithms , *CYCLING , *BICYCLES - Abstract
Bicycles have always been a wonderful transport that is used all over the world. In this automatic world, bicycles can also be automated by designing controllers. Bicycles are highly non-linear; the controller design can be found very difficult. The smart controllers such as Firefly Algorithm (FFA), Bacterial Foraging Optimization (BFO) algorithm, and Ant Colony Optimization (ACO) algorithm are used to design PID controllers and comparable to each other to achieve the best results for a bicycle. The error values are compared by the ANOVA test and the ACO PID results are better. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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14. Grid tied PV and WECS based power generation using super capacitor with MPPT.
- Author
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Devi, K. Indira, Maheswari, S. Uma, Subramanian, A. Sankara, Vijayamenaka, J., and Ramkumar, M. Siva
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SUPERCAPACITORS , *RENEWABLE energy sources , *POWER resources , *ENERGY consumption , *HYBRID systems , *WIND energy conversion systems , *HYBRID power systems , *INDUCTION generators - Abstract
Each optimal idea for distributing mini-rides as well as confined loads in remote regions is modern hybrid electrical technologies combining traditional but sustainable energy conversion systems, characterized by complex interlocking systems but instead increased control dependency for optimized use of resources available, particularly PV cells and wind energy. Providing reliable, cheap energy is an important problem for industrial growth and the associated rise in living standards. Renewable energy sources chosen properly will substantially reduce consumption for fossil fuel, thus improving energy supply sustainability. Under harsh environmental conditions, conventional sources assist renewable sources, which improve the reliability and stability of electricity systems. Combined with environmental and ecological limitations, increasing demand for energy confronts system designers with numerous problems. With the liberalization of energy utilities, sure those customers tend to be viewed as electricity transmission routes from wherever accessible to places, depending on the price that varies with daytime. This research suggests a stand-alone hybrid system. Solar system (SPS) management MPPT is achieved by perturbation and observation methodology and the TSR control method was used to develop WECS MPPT control and field-oriented MSC system control mechanism, which enables the WECS to extract optimum power. A stand-alone rechargeable battery wind-solar system was investigated, Simulation for modelling & analytical models. [ABSTRACT FROM AUTHOR]
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- 2022
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15. Machine Learning Strategy to Achieve Maximum Energy Harvesting and Monitoring Method for Solar Photovoltaic Panel Applications.
- Author
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Ganthia, Bibhu Prasad, Hanumanthakari, Sudheer, Gudimindla, Hemachandra, Anandaram, Harishchander, Ramkumar, M. Siva, Mohanty, Monalisa, Gopal, S. Raja, Sarojwal, Atul, and Hadish, Kibrom Menasbo
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ENERGY harvesting , *SOLAR panels , *SOLAR thermal energy , *MAXIMUM power point trackers , *LEARNING strategies , *MACHINE learning , *SOLAR power plants - Abstract
The choice of the optimal orientation of the solar panels is by far one of the most important issues in the practical application of solar installations. The use of phase changing materials (PCMs) is an efficient approach of storing solar thermal energy. Because PCMs are isothermal in nature, they provide better density energy storage and the capacity to function across a wide temperature range. Unfortunately, this feature is very rare on various solar power panels; however, ignoring it can reduce the performance of the panels to unacceptable levels. The fact is that the angle of incidence of rays on the surface greatly affects the reflection coefficient and, consequently, the role of unacceptable solar energy. In this paper, a smart energy harvesting model was proposed. In the case of glass, when the angle of incidence varies vertically from its surface to 30, the reflection coefficient is practically unchanged and slightly less than 5%, i.e., more than 95% of the radiation goes inwards. Furthermore, the reflection increase is noticeable, and the area of the reflected radiation by 60 doubles to almost 10%. At an angle of incidence of 70, it reflects 20% of the radiation, and at 80, 40%. For most other objects, the dependence of the reflection magnitude on the angle of incidence is approximately the same. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
16. MULTI CONVERTER UNIFIED POWER QUALITY CONDITIONING (MC-UPQC) FOR VARIOUS LOADS WITH ANN APPROACH TO TWO SOURCE CONCEPT.
- Author
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Kumar, K. Suresh, Balachander, K., Amudha, A., Ramkumar, M. Siva, and Kavitha, D.
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ELECTRIC current converters , *LOAD management (Electric power) , *PID controllers , *VOLTAGE control , *ARTIFICIAL neural networks , *DIRECT current circuits - Abstract
Maintaining a strategic distance from the PQ aggravation and upgrading the PQ are the troublesome assignments. More power hardware gadgets are utilized to overcome the PQ unsettling inuences. Multi converter - Unified power quality conditioner (MC-UPQC) is one of the new power gadgets that are utilized for improving the PQ. The framework can be connected to contiguous feeders to adjust for supply-voltage and load current defects on the principle feeder and full pay of supply voltage blemishes on alternate feeders. In the proposed design, all converters are associated consecutive on the dc side and offer a typical dc-interface capacitor. Offering to one DC connect capacitor. The releasing time of DC connect capacitor is high, thus it is the fundamental issue in MC-UPQC gadget. To wipe out this issue, an upgraded ANN based MC-UPQC is proposed in this work. The transient reaction of the PI dc-connect voltage controller is moderate. In this way, a quick acting dc-connect voltage controller in light of the vitality of a dc-interface capacitor is proposed. The transient reaction of this controller is quick when contrasted with that of the regular dc-connect voltage controller. By utilizing uffy rationale controller rather than the PI controller the transient reaction is moved forward. The DC capacitor charging yield voltage is expanded and the reaction is quick when contrasted and PI by utilizing the ANN controller and subsequently, the PQ of the framework is improved. [ABSTRACT FROM AUTHOR]
- Published
- 2019
17. POWER GRID CONNECTED SEMI-Z SOURCE INVERTER SUPPLIED BY PHOTOVOLTAIC AND WIND SYSTEM WITH A NEW MODULATION STRATEGY.
- Author
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Babu, D., Amudha, A., Balachander, K., Emayavaramban, G., and Ramkumar, M. Siva
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ELECTRIC inverters , *PHOTOVOLTAIC power systems , *WIND power plants , *FUEL cells , *ELECTRIC power distribution grids , *DIRECT current circuits , *ALTERNATING current circuits - Abstract
In recent years, due to energy crisis, renewable energy distributed power generators, such as wind turbine, photovoltaic (PV) cell, fuel cell, and thermoelectric generation modules, are becoming more and more popular in industrial and residential applications. Many renewable energy such as PV cell, fuel cell and thermoelectric generation can only output dc voltage. So an inverter interface has to be utilized for grid-connected applications. So many inverter topologies have been proposed and reviewed recently like as Z-source proposed inverter. In this proposed semi-Z-source inverters for a single-phase photovoltaic (PV) system. With low cost and doubly grounded features. These semi-Z-source inverters only two active switches. To achieve the same output voltage as the traditional voltage-fed full-bridge z-source inverter. The input dc source and the output ac voltage of the semi-Z-source inverter share the same ground. Thus lead into less leakage ground current advantages over other non-doubly grounded inverters. [ABSTRACT FROM AUTHOR]
- Published
- 2019
18. IMPLEMENTATION OF HARMONIC MITIGATION OF GRID CONNECTED MODIFIED MLI FOR VARIABLE-SPEED WIND ENERGY CONVERSION SYSTEM.
- Author
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Sivakumar, D., Amudha, A., Balachander, K., and Ramkumar, M. Siva
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WIND energy conversion systems , *PULSE width modulation inverters , *ELECTRIC current converter design & construction , *PERMANENT magnet generators , *PULSE width modulation rectifiers , *PULSE width modulation transformers , *WIND power - Abstract
This paper proposes a single-phase nine-level (9L) inverter topology suitable for control strategy and design of an AC/DC/AC IGBT-PMW power converter for PMSG-based variable-speed wind energy conversion systems (VSWECS) operation in grid/load-connected mode are presented. VSWECS consists of a PMSG connected to a AC-DC IGBT-based PWM rectifier and a DC/AC IGBT-based PWM inverter with LCL filter. The proposed inverter is realized using a T-type neutral point-clamped inverter connected in cascade to a oating capacitor (FC) H-bridge. Additionally, two low-frequency switches are added across the dc-link enabling the inverter to generate a 9L waveform. A sensor less voltage control based on redundant switching state is developed and embedded with PWM controller, which is responsible for regulating the FC voltage at one quarter of the dc source voltage. The proposed PWM technique employs the generation of 9L waveform without using any voltage sensor, thereby reducing the complexity of the overall control scheme. This, in turn, will make the overall system appealing for various industrial applications. In comparison to conventional and recent topologies, generation of the 9L waveform using a lower number of components is the notable contribution. Another important feature of the proposed inverter is that if FC H-bridge fails, it can be bypassed, and the inverter can still operate as a 5L inverter at its nominal power rating. Furthermore, a comprehensive comparison study is included which confirms the merits of the proposed inverter against those of other state-of-the art topologies. Finally, simulation and hardware results are included for validating the feasibility of the proposed system. [ABSTRACT FROM AUTHOR]
- Published
- 2019
19. COMPENSATION OF VOLTAGE VARIATIONS IN DISTRIBUTION SYSTEM DURING FAULT CONDITION BY USING SEPARATE ENERGY STORAGE DEVICE BASED DVR.
- Author
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Sankar, N. A., Balachander, K., Amudha, A., Divyapriya, S., and Ramkumar, M. Siva
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ELECTRIC power distribution faults , *ELECTRIC power distribution grids , *ELECTRIC potential , *ENERGY storage , *ELECTRICAL load , *PID controllers - Abstract
The increased asset utilization, facilitates the penetration of renewable sources and improves the exibility, reliability and efficiency of the grid, Separate Energy Storage Devices (SESD) technology has been progressed. SESD Technology has the potential to bring real power storage characteristic to protect consumer's loads from the grid voltage uctuations like Long and Short term Voltage variation conditions. This project deals the Design of Decision making Switch and operation principle of the SESD based Dynamic Voltage Restorer (DVR) and its design is based on simple PI control method to compensate voltage Fluctuations. The principle of SESD based DVR is analyzed in this work. The performance of the SESD is validated through simulations using MATLAB SIMULINK and the results reveals that the SESD can be a useful DC source for the DVR. [ABSTRACT FROM AUTHOR]
- Published
- 2019
20. AN EFFICIENT HIGH STEP UP CONVERTER FOR AUTOMOBILE APPLICATIONS USING FUZZY LOGIC CONTROL TECHNIQUE.
- Author
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Kalimuthu, T., Balachander, K., Amudha, A., Emayavaramban, G., and Ramkumar, M. Siva
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ELECTRIC current converter design & construction , *FUZZY control systems , *ELECTRIC inductors , *ZERO voltage switching , *METAL oxide semiconductor field-effect transistors , *ELECTRIC inductance , *RESONANCE frequency analysis - Abstract
The resonance analysis and soft switching design of the isolated boost converter with coupled inductors are designed in this project. Due to the resonance participated by the voltage doubler capacitor, clamping capacitor, and leakage inductance of coupled inductors, the reverse recovery problem of the secondary diodes is restrained within the whole operation range. By choosing appropriate magnetic inductance of the coupled inductors, zero voltage switching ON of the main MOSFET is obtained collectively at the same working conditions without any additional devices. Moreover the rang of duty ratio is enlarged to achieve soft switching and an optimal operation point is obtained with minimal input current ripple, when duty ratio approaches 0.5, additionally, two kinds of resonances are analyzed and an optimized resonance is utilized to achieve better power density. The high step up conversion is achieved by using soft switching methodology with fuzzy logic system. [ABSTRACT FROM AUTHOR]
- Published
- 2019
21. ANALYSIS AND PARALLEL OPERATION OF NOVEL BIDIRECTIONAL DC-DC CONVERTER FOR DC MICROGRID.
- Author
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Kaleeswari, K., Balachander, K., Amudha, A., Ramkumar, M. Siva, and Kavitha, D.
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DC-to-DC converters , *MICROGRIDS , *PHOTOVOLTAIC power systems , *ELECTRIC inverters , *RENEWABLE energy sources - Abstract
Concerns over environment and increased demand of energy have led the world to think about alternate energy sources such as wind, hydro, solar and fuel cells. Out of these, photovoltaic (PV) power generation systems have become increasingly important all over the world due its availability, cleanness, low maintenance cost and inexhaustible nature. But power produced by the photovoltaic system is stochastic in nature due to the variation of solar irradiation and cell temperature throughout the day. In order to track the varying power, a DC-DC converter have been proposed for the parallel operation of PV panel. The proposed DC/DC converter is designed by a coupled inductor with same winding turns in the primary and secondary sides. In step-up mode, the primary and secondary windings of the coupled inductor are operated in parallel charge and series discharge to achieve high step-up voltage gain. In step-down mode, the primary and secondary windings of the coupled inductor are operated in series charge and parallel discharge to achieve high step-down voltage gain. Thus, the proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc-dc boost/buck converter. The proposed converter and the conventional bidirectional boost/buck converter, the average value of the switch current in the proposed converter is less than the conventional bidirectional boost/buck converter. [ABSTRACT FROM AUTHOR]
- Published
- 2019
22. INTELLIGENT POWER TRACKING ALGORITHM USING ANFIS AND ZETA CONVERTER.
- Author
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Nandhini, S., Kavitha, D., Kalaiarasi, S., Amudha, A., and Ramkumar, M. Siva
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TRACKING algorithms , *PHOTOVOLTAIC power systems , *MAXIMUM power point trackers , *RENEWABLE energy sources , *ELECTRIC power conversion - Abstract
Nowadays, environmental problems due to existing power plants seem to acquire more attention around the world, because it increases continuously the earth temperature and warming. Nowadays, renewable energies, especially photovoltaic (PV) energy, considered as palliative energy resource, are growing rapidly and are used in several applications, e.g., battery charging, home energy supply, and pumping systems. However, they suffer from a relatively low conversion efficiency, which makes their optimization necessary. This is done by extracting their maximum power for uctuating climatic environments. An efficient ANFIS based tracking algorithm is proposed for PV applications under mismatching conditions. PV fed zeta converter is used to step-up the output voltage and track the maximum power efficiently. An ANFIS based MPPT algorithm takes minimum time to find the MPP when subjected to rapid change in irradiance. [ABSTRACT FROM AUTHOR]
- Published
- 2019
23. INTEGRATED DC/DC PARALLEL MAXIMUM POWER POINT TRACKING BASED PHOTOVOLTAIC SYSTEM ARCHITECTURE FOR COMMON DC BUS.
- Author
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Akiladevi, V., Amudha, A., Balachander, K., Ramkumar, M. Siva, and Divyapriya, S.
- Subjects
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MAXIMUM power point trackers , *PHOTOVOLTAIC power systems , *DC-to-DC converters , *DIRECT current circuits , *TRACKING algorithms - Abstract
Concerns over environment and increased demand of energy have led the world to think about alternate energy sources such as wind, hydro, solar and fuel cells. Out of these, photovoltaic (PV) power generation systems have become increasingly important all over the world due its availability, cleanness, low maintenance cost and inexhaustible nature. But power produced by the photovoltaic system is stochastic in nature due to the variation of solar irradiation and cell temperature throughout the day. In order to track the varying power, a DC-DC converter with maximum power point tracker (MPPT) is used. Different MPPT algorithms have been proposed for tracking peak power from the PV panel. Selection of adequate DC-DC converter is also an important factor since it has an inuence on overall performance of the PV system. This paper presents a comparative study on the characteristics of different non-isolated DC-DC converters and highlights the various research works that has been done on DC-DC converters based MPPT PV system. Study shows that selection of converter also has an impact on the overall performance of the PV system. Based on the survey and comparative study, selection criteria to choose DC-DC converter for PV system is described in this paper. [ABSTRACT FROM AUTHOR]
- Published
- 2019
24. ANALYSIS AND ENERGY EFFICIENCY OF SMALL-SCALE WIND ENERGY CONVERSION SYSTEM USING ADAPTIVE NETWORK BASED FUZZY INTERFERENCE SYSTEM (ANFIS) OF MAXIMUM POWER POINT TRACKING METHOD.
- Author
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Veluchamy, R., Balachander, K., Amudha, A., Ramkumar, M. Siva, and Emayavaramban, G.
- Subjects
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WIND energy conversion systems , *FUZZY systems , *MAXIMUM power point trackers , *ENERGY consumption , *ELECTRIC interference , *WIND speed , *WIND turbines - Abstract
The power control of small-scale wind energy conversion system is usually limited by the sluggish mechanical dynamic. Aiming at highlighting this phenomenon, this article introduces a small-scale wind energy conversion system using the permanent magnet synchronous machine as generator to validate different combinations of control strategy resulting from four different maximum power point tracking (MPPT) methods with hysteresis control: one indirect MPPT method based on a look-up table and three direct methods based on perturb and observe relationship. Following two ideal wind speed profiles, a real rapid wind speed profile and using a test bench emulating a small-scale wind turbine, the MPPT methods are compared and analysed based on experimental results. The indirect method operates with the best MPPT performances for all three wind speed profiles while requiring accurate knowledge of the controlled system. The direct methods operate with low MPPT performance under rapid variation of wind speed and the superiority of variable step size is not significant since the dynamic process of the perturbation strongly weakens the effect of MPPT algorithm. In proposed system Adaptive Network-based Fuzzy Interference System is used to control the MPPT. [ABSTRACT FROM AUTHOR]
- Published
- 2019
25. A FUZZY LOGIC APPROACH TO MICROGRID DEMAND RESPONSE IN BOTH OFFLINE AND ONLINE MODE.
- Author
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Srinivasan, P., Balachander, K., Amudha, A., Emayavaramban, G., and Ramkumar, M. Siva
- Subjects
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MICROGRIDS , *ELECTRIC vehicles , *RENEWABLE energy sources , *ENERGY storage , *PHOTOVOLTAIC power systems , *WIND turbines , *DIESEL electric power-plants , *FUZZY logic - Abstract
Increasing energy demand is motivating us to search for new way to meet the demand with existing grid system. This can be fulfilled with microgrids. But there is a challenge in controlling point of renewable energy system and energy storage unit in microgrids. That is switching the microgrid according to the demand without disturbing the main grid in both online and offline conditions. This project presents a control method for demand response management to optimize the microgrid composed of PV system, wind turbine, diesel generator and energy storage unit. In order to address the problem, the proposed control technique is fuzzy logic control. This proposed control strategy efficiently manage the response to demand and ensure the independent operation of microgrid with respect to the main grid in both online and offline conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2019
26. GRID CONNECTED WIND ENERGY CONVERSION SYSTEM WITH UNIFIED POWER QUALITY CONDITIONER (UPQC) BY FUZZY LOGIC.
- Author
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Shaheeth, M. Mohammed, Kavitha, D., Amudha, A., Ramkumar, M. Siva, Balachander, K., and Emayavaramban, G.
- Subjects
- *
WIND energy conversion systems , *POWER supply quality , *ELECTRICAL load , *ELECTRIC power distribution grids , *ELECTRIC currents , *IDEAL sources (Electric circuits) , *ELECTRIC transformers , *FUZZY logic - Abstract
Unified Power Quality Conditioner (UPQC) device combines a shunt active filter together with a series active filter in a back-to-back configuration, to simultaneously compensate the supply voltage and the load current. The Three phase four wire system is realized from a three phase three wire system. In three phases, four wire system electrical loads are connected from line to neutral of the three phases. Neutral current in three-phase power systems is often thought to be only the result of the imbalance of the phase currents. Unbalance is a serious power quality problem, mainly affecting low-voltage distribution systems, as for instance encountered in office buildings with abundant PCs and lighting. In an ideal balanced sinusoidal three-phase power system, the neutral current is the vector sum of the three phase currents, should be equal to zero. Under normal operating condition, some phase unbalance occurs resulting in a small neutral current. A new control strategy to balance the unbalanced load currents is presented. The neutral current that may ow towards transformer neutral point is compensated by using a four-leg voltage source inverter topology in shunt part of the inverter. Hysteresis controller is mainly used to control the gating pulses of the inverter. The series transformer neutral will be at virtual zero potential during all operating conditions. The simulation results based on MAT-LAB/Simulink are presented to show the effectiveness of the proposed UPQC-based three phases four wire distribution system. [ABSTRACT FROM AUTHOR]
- Published
- 2019
27. TRANSIENT STABILITY IMPROVEMENT IN POWER SYSTEM WITH SMES AND BATTERY ENERGY STORAGE SYSTEM.
- Author
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Chinnusamy, C., Emayavaramban, G., Amudha, A., Balachander, K., and Ramkumar, M. Siva
- Subjects
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TRANSIENT stability of electric power systems , *BATTERY storage plants , *MAGNETIC energy storage , *ELECTRIC power distribution grids , *REACTIVE power control , *ELECTRIC loss in electric power systems , *ELECTRIC power system stability - Abstract
In recent years constraints forced by the environment, right of way and energy costs have resulted in power systems operating with considerably reduced stability margins. Consequently, modern power systems depend strongly on stabilizing devices to keep reliable and stable operation. These devices should provide sufficient damping in the system, during the transient period following a system disturbance, such as line switching, load changes and fault clearance. To avoid collapse of the system due to loss of synchronism or voltage instability, countermeasures such as power system stabilizers, optimal turbine governor control systems and phase shifters have been used. This concept presents the transient stability analysis of a power grid, which integrates both Superconducting Magnetic Energy Storage (SMES) and Gridable Vehicles (GVs). Also, Vehicle-to Grid (V2G) operation is devised to control GVs to charge power from or discharge to the grid. SMES and GVs to adjust the active power and reactive power to support the System. Simulations of both balanced and unbalanced faults such as 3LG fault, LG fault, LLG fault are carried. The system model is established and simulated using the Matlab/Simulink. The results of load angle response and system voltage response are given to illustrate that both SMES and GVs can enhance transient stability of the power grid. Moreover, the simultaneous use of SMES and GVs can further improve the system dynamic performances. [ABSTRACT FROM AUTHOR]
- Published
- 2019
28. A PHOTOVOLTAIC GENERATION SYSTEM BASED ON HYBRID MULTILEVEL INVERTER IN ORDER TO REDUCE SWITCHING FOR DC MICRO GRIDS.
- Author
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Karunamoorthy, C., Amudha, A., Balachander, K., and Ramkumar, M. Siva
- Subjects
- *
PHOTOVOLTAIC power systems , *ELECTRIC inverters , *MICROGRIDS , *DIRECT current circuits , *ELECTRIC power production , *ELECTRIC loss in electric power systems , *ELECTRIC power conversion - Abstract
In this paper, a photovoltaic (PV) generation system based on Hybrid Multilevel inverter is proposed. Hybrid multilevel inverter gives multilevel operation by using hybrid source, hybrid configuration or hybrid device in such a way to produce output with reduced number of DC sources, high speed capability, low output switching frequency, low switching loss, high conversion efficiency, exibility to enhance and various topologies for different applications. Simulations and analysis are done by the use of MATLAB/SIMULINK software. [ABSTRACT FROM AUTHOR]
- Published
- 2019
29. ANALYSIS OF NEW NOVELTY MULTILEVEL INVERTER CONFIGURATION WITH BOOST CONVERTERS FOR A PHOTOVOLTAIC SYSTEM WITH MPPT.
- Author
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Kumar, S. Senthil, Kavitha, D., Amudha, A., Emayavaramban, G., and Ramkumar, M. Siva
- Subjects
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ELECTRIC inverters , *PHOTOVOLTAIC power systems , *MAXIMUM power point trackers , *HARMONIC distortion (Physics) , *ELECTRIC loss in electric power systems , *PERTURBATION theory - Abstract
This paper proposes a single phase multilevel inverter configuration that conjoins three series connected full bridge inverter and a single half bridge inverter for renewable energy application especially photovoltaic system. This configuration of multilevel inverter reduces the value of total harmonic distortion. The half bridge inverter utilized in the proposed configuration increases the output voltage level to nearly twice the output voltage level of a conventional cascaded H-bridge multilevel inverter. This higher output voltage level is generated with lesser number of power semiconductor switches compared to conventional configuration, thus reducing the total harmonic distortion and switching losses. The effectiveness of the proposed configuration is illustrated by replacing the isolated DC sources in multilevel inverter with individual photovoltaic panels using separate perturb and observer based maximum power point tracking and boost converters. The verification of the proposed system is demonstrated successfully using MATLAB/Simulink based simulation with different irradiation and temperature conditions. Also, the transient operation of the system is verified with results depicted using step change in standard test condition. Selective experimental results are presented to prove the effectiveness of proposed system. [ABSTRACT FROM AUTHOR]
- Published
- 2019
30. PV AND FUEL CELL BASED DYNAMIC VOLTAGE RESTORER FOR LVRT IMPROVEMENT OF DFIGWTS.
- Author
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Shobana, R., Balachander, K., Amudha, A., Emayavaramban, G., and Ramkumar, M. Siva
- Subjects
- *
LOW voltage systems , *INDUCTION generators , *PHOTOVOLTAIC power systems , *FUEL cells , *WIND turbines - Abstract
The project proposes about the compensating fault ride-through (FRT) of a wind turbine based on doubly-fed induction generator (DFIG), voltage dip by using a PV supported dynamic voltage restorer (DVR). DVR a custom power device is used in series with grid by using coupling transformer. This device is used to protect the critical load in which the fault occurred due to source side disturbance. PV is used as a source to DVR and during fault PV supports DVR to clear the fault. With the proposed control method, the DVR can compensate for the FRT, while the DFIG wind turbine can continue its normal operation as demanded in actual grid codes. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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