一种耦合点隔离型模块化有源电力滤波器  

A Modular Active Power Filer Based on Point of Common Coupling Isolated

作　　者：周娟 孙宁 张海军 徐青源 董浩 段雪滢 ZHOU Juan, SUN Ning, ZHANG Haijun, XU Qingyuan, DONG Hao, DUAN Xueying(School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, Chin)

机构地区：[1]中国矿业大学电气与动力工程学院

出　　处：《电网技术》2018年第4期1281-1289,共9页Power System Technology

基　　金：国家自然科学基金项目(51407184);国家级大学生创新训练计划(201610290030)~~

摘　　要：为满足并联型有源电力滤波器（shunt active power filter,SAPF）不同补偿容量需求,提升模块化设备的通用性和可扩展性,提出一种耦合点隔离型模块化有源电力滤波装置解决方案。对APF多模块并联结构的稳定性及直流侧电压需求进行了分析,结果表明,其稳定性问题会给控制器设计带来困扰,且并联模块的直流侧电压不能得到有效降低。所提出的耦合点隔离型模块化有源滤波装置,以H桥级联作为分压模块实现有源滤波部分与公共耦合点电压在控制上的软隔离,有源滤波模块承担谐波及无功电流补偿任务。该系统运行于弱电网时,其多机并联稳定性可等效处理为单机运行于理想电网的稳定性问题,降低了多模块系统控制器设计的难度。仿真和实验验证了所提方案的有效性。1 In order to meet demand of different compensation capacities of shunt active power filters（APFs） and improve universality and extensibility of modular devices, a new type of modular APF based on point of common coupling（PCC） isolated is proposed in this paper. Demand of DC capacitor voltage of the APF modules and stability of parallel multi-module APF system are analyzed, showing that its stability problem will cause difficulty in controller design, and the DC side voltage of parallel APF module cannot be reduced as well. The modular APF based on PCC isolated uses cascaded H bridges as voltage division modules to realize soft isolation for control between active filter modules and PCC, and full-bridge inverters as active filter modules to compensate harmonic and reactive current. Parallel multi-modular stability problems under weak power grid can be equivalently dealt with single APF stability problem in ideal grid, thus effectively simplifying multi-module controller design. Effectiveness of the proposed APF is verified by simulation and experiment results.

关 键 词：有源电力滤波器 级联H桥 多机并联 稳定性 

分 类 号：TM721[电气工程—电力系统及自动化]