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Energies 2015, 8(8), 8908-8923; doi:10.3390/en8088908

Interval Type-II Fuzzy Rule-Based STATCOM for Voltage Regulation in the Power System

Department of Electrical Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Akhtar Kalam
Received: 9 July 2015 / Revised: 6 August 2015 / Accepted: 17 August 2015 / Published: 21 August 2015
(This article belongs to the Special Issue Electric Power Systems Research)
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Abstract

The static synchronous compensator (STATCOM) has recently received much attention owing to its ability to stabilize power systems and mitigate voltage variations. This paper investigates a novel interval type-II fuzzy rule-based PID (proportional-integral-derivative) controller for the STATCOM to mitigate bus voltage variations caused by large changes in load and the intermittent generation of photovoltaic (PV) arrays. The proposed interval type-II fuzzy rule base utilizes the output of the PID controller to tune the signal applied to the STATCOM. The rules involve upper and lower membership functions that ensure the stable responses of the controlled system. The proposed method is implemented using the NEPLAN software package and MATLAB/Simulink with co-simulation. A six-bus system is used to show the effectiveness of the proposed method. Comparative studies show that the proposed method is superior to traditional PID and type-I fuzzy rule-based methods. View Full-Text
Keywords: photovoltaic array; interval type II fuzzy rule; STATCOM; voltage variation photovoltaic array; interval type II fuzzy rule; STATCOM; voltage variation
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MDPI and ACS Style

Hong, Y.-Y.; Hsieh, Y.-L. Interval Type-II Fuzzy Rule-Based STATCOM for Voltage Regulation in the Power System. Energies 2015, 8, 8908-8923.

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