同步旋转坐标系中谐波电流分次控制策略

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摘要提出一种基于同步旋转坐标系（SRF）的有源电力滤波器（APF）谐波电流分次控制策略。为了实时提取各次SRF上同步谐波补偿电流直流量,以提高控制系统的动静态性能,实现SRF上谐波电流的PI解耦控制,该策略摒弃了传统控制中采用低通滤波器（LPF）的方法,充分利用谐波指令电流信息,通过简单的算法变换消除SRF上非同步谐波补偿电流交流扰动量,从而快速提取出该SRF同步直流量。通过建立APF同步旋转坐标系谐波数学模型,详细论述了所提SRF谐波电流分次控制策略,并对该控制系统进行了分析和设计。理论分析和实验结果表明,该策略由于消除了各次SRF电流闭环控制回路中的LPF延时,能够有效提高控制系统的稳定裕度、动态响应速度以及控制准确度。

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关键词 ：有源电力滤波器, 同步旋转坐标系, 谐波电流分次控制, PI解耦控制

Abstract：This paper proposes a harmonic current frequency dividing control strategy for active power filter (APF) based on synchronous rotating frame (SRF). In order to extract the DC component from the APF harmonic compensation currents on each SRF in real time, this strategy makes full use of the information of the harmonic instruction currents, and through a brief transformation eliminates the AC disturbances of the asynchronous compensation currents on the SRF This strategy removes the time delay caused by low pass filter (LPF) in the traditional control method, which can improve the steady-state and dynamic performance of the APF control system as well as realize the PI decoupling control of the harmonic currents on SRF. Based on the harmonic mathematic model on SRF of the three-phase shunt APF, this paper introduces this control strategy in detail. Moreover, the control system of this strategy is analyzed and designed. The theory analysis and experimental results shows that, this control method can increase the stability margin, the dynamic response speed, and the control accuracy effectively.

Key words： Active power filter synchronous rotating frame harmonic current frequency dividing control PI decoupling control

收稿日期: 2014-06-13 出版日期: 2016-09-01

PACS:

TM46

基金资助:中国博士后科学基金（2016M591739）和江苏省高校自然科学研究项目（14KJB470008）资助

作者简介: 许胜男,1976年生,博士后,副教授,研究方向为电力电子技术在电力系统中的应用。E-mail: xush_00@sina.com（通信作者）;费树岷男,1961年生,教授,博士生导师,从事非线性控制、模式识别等研究。E-mail: smfei@seu.edu.cn

引用本文:

许胜, 费树岷, 赵剑锋. 同步旋转坐标系中谐波电流分次控制策略[J]. 电工技术学报, 2016, 31(16): 154-162. Xu Sheng, Fei Shuming, Zhao Jianfeng. Harmonic Current Frequency Dividing Control Strategy Based on Synchronous Rotating Frame. Transactions of China Electrotechnical Society, 2016, 31(16): 154-162.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I16/154

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