Search

This paper primarily focuses on a systematic top-down approach in the structural and feasibility analysis of the novel modular system which integrates a 5 kW wind turbine with compressed air storage built within the tower structure, thus replacing the underground cavern storing process. The design aspects of the proposed modular compressed air storage system (CAES) were executed to eliminate the multistage air compression process and overcome the adverse safety issues of underground caverns prevailing in the conventional system. Moreover, the waste heat treatment can be eliminated owing to its low-pressure operation (8 bar max) which reduces the complexity of the system. A detailed structural analysis was conducted for the foundation, tower structure, storage chamber and wind blades using the Structural Analysis and Designing Program (STAADPRO) and Analysis System (ANSYS) software for a basic wind speed of 180 km/hour (50 m/sec) as per the IS 875 (Part 3): 2015. Certainly, the results proved that the system remained stable at its natural and sub-harmonic frequencies. However, to ensure the feasible operation of the concept, a prototype model was tested for wind speeds starting from 3 m/s and was found to compress up to a maximum of 8 bar pressure.

This paper analyses an optimum Total Harmonic Distortion (THD) value for multilevel inverters using Hybrid Particle Swarm Optimization Algorithm (HPSO). The proposed paper instigates an algorithm which supersedes the conventional algorithms in finding out an optimum global value. The prime objective of this paper is to reduce the THD value of the Asymmetric H-bridge multilevel inverters by choosing appropriate values from the inequality constraints. The proposed algorithm is simulated for an 11-level H bridge inverter using matlab 2014 version software. The results interpreted seemed to have a satisfactory higher order harmonic elimination compared to the conventional methods.

This paper focuses on an improved DC/DC converter with a novel soft switching technique to improve the conversion efficiency for wide load range and high voltage applications. A five level inverter topology is proposed during the first stage of conversion process which reduces the voltage stress across the switching devices to 1/3 rd of the input voltage thereby reducing the voltage rating of the device for high voltage applications. The proposed topology is designed for industrial drive applications. The modulation strategy for the proposed topology is developed using Secondary side phase shift (SSPS) control technique. In addition, this scheme exhibits soft — commutation (ZVS) for both the primary and secondary side switches which minimizes the switching losses to a great extent. Further, the Permanent Magnet DC Motor is mathematically modeled in this work which provides the output more equivalent to the real time applications. The PMDC motor is made to run at its rated speed and the simulation results thus obtained are discussed in detail. The operation of the DC/DC converter used in industrial drive applications is analyzed using, the modeled Permanent Magnet DC motor. The proposed circuit is simulated using MATLAB 7.10.0 (R2010a) version.