基于降阶广义积分器的LCL型有源电力滤波器电流控制方法研究  

A Current Control Method for LCL Active Power Filters Based on the Reduced Order Generalized Integrator

作　　者：杨家强[1] 杨磊[1] 曾争 宿紫鹏 YANG Jiaqiang YANG Lei ZENG Zheng SU Zipeng(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China Electric Power Science Research Institute of Guangdong Power Grid Co.,Ltd, Guangzhou 510080, Guangdong Province, China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]广东电网有限责任公司电力科学研究院,广东省广州市510080

出　　处：《中国电机工程学报》2017年第7期2057-2067,共11页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划(973计划)(2013CB035604);浙江省自然科学基金项目(LY14E070011);浙江省公益性技术应用研究计划资助项目(2015C31125)~~

摘　　要：为了实现LCL型有源电力滤波器(active power filter,APF)在稳定控制的同时,不增加系统的复杂程度,提出了一种基于电网电流检测、逆变侧电流反馈的电流双环控制方法。在不额外增加电流传感器的情况下,通过引入逆变侧电流反馈,实现了对LCL滤波器谐振尖峰的有源阻尼。同时,为了准确地跟踪电网中的谐波电流信号,在2阶广义积分器的基础上,提出了基于降阶广义积分器的电流控制器。利用降阶积分器频率选择和相序解耦的特性,同时实现了较高的谐波补偿精度和运算效率。在一台50k VA LCL型APF上对所提出的控制方法进行了实验验证,实验结果证明了该方法的有效性。In order to implement the stable control of active power filters （APF） with LCL filters without increasing the system complexity, a current dual-loop control method is proposed on the basis of source current detection and inverter-side current feedback. Without the additional current sensors, the active damping for the resonance peak of LCL filters is implemented by introducing inverter-side current feedback. Meanwhile, in order to accurately track source harmonic currents, the reduced order generalized integrator （ROGI）-based current controller is proposed on the basis of the second order generalized integrator （SOGI）. High harmonic compensation precision and computing efficiency are both realized because ROGI is sensitive to both frequency and sequence. Finally, the proposed method is proved to be valid by experiments on a 50KVA APF with LCL filter.

关 键 词：有源电力滤波器 降阶广义积分器 LCL滤波器 电网电流检测 逆变侧电流反馈 有源阻尼 

分 类 号：TM77[电气工程—电力系统及自动化]