有源滤波器故障诊断与容错控制改进策略的研究  

Research of improved strategy for active power filter fault diagnosis and fault tolerant control

作　　者：汪玉凤[1] 孟庆达[1] 刘涛[2] 李国华[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105 [2]国网辽宁省电力有限公司阜新供电公司,辽宁阜新123000

出　　处：《电力系统保护与控制》2016年第13期145-150,共6页Power System Protection and Control

基　　金：国家自然科学基金项目(51307076)~~

摘　　要：为了能够改善并联型三相四开关有源电力滤波器的容错能力,提高滤波器的可靠性,针对SAPF(Shunt Active Power Filter,SAPF)的故障诊断策略,提出了一种能够快速反应故障类型和故障位置的混杂系统模型法。通过对系统输出电流残差演变规律的判断,识别故障源。再运用对应容错切换策略切除故障桥臂,使SAPF在容错状态下继续工作。同时,通过对SAPF补偿算法的研究,得出了更适合SAPF容错切换的电源电流跟踪补偿策略。并在此基础上添加了前馈控制来消除容错状态下直流侧分裂电容中点电位不平衡的影响,使补偿效果更好。实验和仿真验证了该方法的有效性。In order to improve fault tolerance of three-phase four-switch shunt active power filter and increase the reliability of the filter, and for the troubleshooting of SAPF, this paper presents a fast response fault type and fault location by hybrid system dynamic model and identifying sources of error through its evolution of the residual of system output current. Fault-tolerant switching strategy is utilized to remove the corresponding fault arm, so SAPF under the circumstance of fault-tolerant model continues working. At the same time, this paper obtains the source current tracking compensation strategy, which is more suitable for fault-tolerant switching SAPF, through the study of SAPF compensation algorithm. Furthermore, feedforward control is added to eliminate influence of split capacitors unbalanced midpoint electrical potential of DC side under fault-tolerant state, the effect of compensation is more significant. Experiments and simulations verify the effectiveness of the method.

关 键 词：有源电力滤波器 电流残差 混杂系统 电源电流跟踪补偿 前馈控制 

分 类 号：TN713.8[电子电信—电路与系统] TM761[电气工程—电力系统及自动化]