三相并联式功率调节系统孤岛检测研究  

Islanding Detection for Three-phase Paralleling Power Conditioning Systems

作　　者：刘宝其[1] 陈昌松[1] 段善旭[1] 江小龙[1] 芦铭辉[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2013年第13期127-134,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2010CB227206)~~

摘　　要：提出一种适用于三相功率调节系统(power conditioningsystems,PCS)的带频率正反馈的主动移相式孤岛检测方法(active phase shift with positive feedback,APSPF)。通过引入频率误差形成主动移相角,并对系统的有功电流和无功电流采用不同的dq变换式,使得系统的有功不受频率误差的影响,而无功受控于主动移相角。给出APSPF法的检测盲区,分析该方法对无功功率控制精度的影响。针对多台PCS并联系统,分类讨论不同情况下的孤岛检测效果,分析各PCS频率检测误差对并联孤岛检测的影响。该方法易于实现,不影响并网电流波形控制能力,对系统的无功功率影响小,能适应不同的并网控制策略,且具有良好的鲁棒性,可以很好地适应多机并联系统。仿真和实验证明了所提孤岛检测方法的正确性和可行性。An islanding detection method （IDM） based on active phase shift with positive feedback （APSPF） was proposed, which is appropriate for three-phase power conditioning systems （PCS）. By introducing the active phase shift angle that is proportional to frequency error and using different dq-transformations for the active current and reactive current respectively, the active power is unaffected by the APSPF while the reactive power is controlled by it. The none-detection zone （NDZ） of APSPF was described and its impact on reactive power control accuracy was discussed as well. The performances of the APSPF were described in several different cases, and the impact on frequency detection errors from each PCSwais analyzed in a multiple PCSs parallel system. The APSPF is easy to implement and has little impact on the reactive power without deteriorating the grid-connected currents, and it is well adapted to the parallel system with good robustness. Simulation and experimental results testified the correctness and feasibility of the proposed method.

关 键 词：功率调节系统 孤岛检测 主动移相 检测盲区 

分 类 号：TM46[电气工程—电器]