Improved Power Control Using Optimal Adjustable Coefficients for Three-Phase Photovoltaic Inverter under Unbalanced Grid Voltage

被引：1
作者：
Wang, Qianggang [1 ]
Zhou, Niancheng [1 ]
Lou, Xiaoxuan [1 ,2 ]
Chen, Xu [3 ]
机构：
[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Sa, Chongqing 400044, Peoples R China
[2] Univ Wisconsin, Dept Elect Engn, Milwaukee, WI 53211 USA
[3] S China Univ Technol, Guangdong Key Lab Clean Energy Technol, Guangzhou 510640, Guangdong, Peoples R China
来源：
SCIENTIFIC WORLD JOURNAL | 2014年
基金：
中国国家自然科学基金;
关键词：
CONTROL SCHEME; CONVERTERS; SYSTEM;
D O I：
10.1155/2014/538520
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Unbalanced grid faults will lead to several drawbacks in the output power quality of photovoltaic generation (PV) converters, such as power fluctuation, current amplitude swell, and a large quantity of harmonics. The aim of this paper is to propose a flexible AC current generation method by selecting coefficients to overcome these problems in an optimal way. Three coefficients are brought in to tune the output current reference within the required limits of the power quality (the current harmonic distortion, the AC current peak, the power fluctuation, and the DC voltage fluctuation). Through the optimization algorithm, the coefficients can be determined aiming to generate the minimum integrated amplitudes of the active and reactive power references with the constraints of the inverter current and DC voltage fluctuation. Dead-beat controller is utilized to track the optimal current reference in a short period. The method has been verified in PSCAD/EMTDC software.
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页数：12
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