Comparative Analysis of PI, FOPI and Fuzzy Logic Controllers to Mitigate Voltage Sags Effects on an Induction Motors

Conference: Research in Communication Network and Power Engineering
Author(s): V. A. Huchche, N. R. Patne, A.S. Junghare Year: 2017
Grenze ID: 02.CNPE.2017.5.516 Page: 59-64

Abstract

The integer order (PI), fractional order PI (FOPI)\nand fuzzy logic (FL) controllers were used with the dynamic\nvoltage restorer (DVR) to neutralize the impacts of voltage sags\non an induction motor. DVR was used to protect the induction\nmotor from symmetrical voltage sags. DVR with PI/FO-PI\ncontroller has a simple structure. Precise tuning of the gains in\ncontroller is a major issue being dealt with in the PI as well as\nFO-PI controllers. Changing system parameters and operating\nconditions do not render desired output with fixed gains. Fuzzy\nlogic controllers are widely used to cover the variations in the\nmachine parameters and operating environments. This study\ndemonstrates the utility of a fuzzy logic controller in\ncounteracting the ills of voltage sags on induction motors.\nModeling and simulation of a DVR using PI/FO-PI and fuzzy\nlogic controllers was designed in the MATLAB/Simulink.\nDynamic state of the motor during sag and the voltage source\ninverter\'s switches are non linear. Fuzzy logic being a non-linear\ncontroller, excellent DVR output with it was achieved. Simulation\nresults validated that DVR with fuzzy logic control system is fast,\nflexible and efficient for voltage sag compensation. Performance\nof the proposed controllers are evaluated and compared based on\ncontroller\'s efforts and time domain performance indices such as\nIAE, ISE and ITAE. Results show that proposed fuzzy logic\ncontroller provides a smoother mitigation of voltage sag with\nlesser controller effort and time domain indices.

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CNPE - 2017