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9. A Simplified DTC-SVPWM Scheme for Induction Motor Drives Using a Single PI Controller.

Author

Peter, Antony K., Mathew, Jaison, and Gopakumar, K.

Abstract

Apart from variable switching frequency, a major issue in direct torque controlled (DTC) induction motor drives is the high torque ripple, which can be minimized by incorporating suitable pulsewidth modulation schemes such as space vector pulsewidth modulation (DTC-SVPWM) and duty ratio control DTC. However, the simplicity and robustness of the DTC scheme are compromised due to the high computational complexity and requirement of a number of motor parameters for the control. In this article, a simple and elegant control algorithm for the realisation of the DTC-SVPWM that is less dependent on motor parameters is proposed. The stator flux-linkage space vector angle needed to generate the reference torque for the DTC operation is computed based on the basic torque equation and the reference stator phase voltage needed for the SVPWM is determined in turn in every sampling period. For the modulation, a carrier-based space vector pulsewidth modulation (CSVPWM) scheme is adopted to get low torque ripple at constant switching frequency. The proposed speed control scheme avoids the use of rotor parameters and rotating reference frame transformations. It requires no sector identification and only one PI controller is needed for the speed control. Though the scheme has comparable torque ripple as that of the conventional DTC-SVPWM scheme, it significantly reduces the computational burden. Hardware results on a three-phase, 2 HP, 415 V induction motor are presented to validate the performance of the proposed control scheme. [ABSTRACT FROM AUTHOR]

Published
2023
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10. A Global Analysis on Microgrids through the PESTEL Framework

Author

Ghotge, R., van Wijk, A.J.M., Vandeventer, Elisabeth, Alvarez, Juan Sebastian, Mathew, Jaison, and Kumar Rathore, Akshay

Subjects
Microgrid, business.industry, media_common.quotation_subject, Reliability (computer networking), Distribution (economics), PESTEL, Environmental economics, Renewable energy, Smart grid, Software deployment, Quality (business), Business, Electricity, Closed distribution network, media_common
Abstract

Microgrids enable distribution of electricity with higher shares of variable renewables, higher power quality, greater reliability and higher efficiency. There are a large number of factors in addition to the technology, which affect their shift towards market competitiveness and widespread adoption. The PESTEL framework, covering Political, Economic, Social, Technical, Environmental and Legislative factors, is used to identify and describe the drivers and barriers for microgrid development at the global level. The framework enables a broader approach to describe potential for microgrid applications. The results aim to provide engineers, project developers and microgrid specialists with an overview of the prospects for microgrid deployment.

Published
2020

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