摘要
应用有源电力滤波器(APF)能够有效消除电网中的电流谐波,提高电能质量,有助于电力系统安全运行。APF中开关元件的开路故障诊断是保证APF安全运行的关键技术。对于基于滞环控制的三相四线制二电平并联APF,通过测量计算得到APF电路输出交流电压特征量。根据电压特征量与滞环控制器输出控制信号,构造故障诊断变量并设计了开关元件开路故障实时诊断算法。基于APF电路模型,证明了所提出的故障诊断方法的正确性。系统仿真结果表明该算法能够准确诊断基于滞环控制的APF中可能发生的单一或多重开关元件的开路故障。
The application of active power filter(APF)can effectively eliminate the current harmonics in the power grid,improve the power quality,and contribute to the safe operation of the power system.The open-circuit fault diagnosis of switching elements in APF is the key technology to ensure the safe operation of APF.For the three-phase four-wire two-level parallel APF based on hysteresis control,the output AC voltage characteristic quantity of the APF circuit is obtained by measurement and calculation.According to the voltage characteristic quantity and the output control signal of hysteresis controller,the fault diagnosis variable is constructed,and the open-circuit fault diagnosis algorithm of the switching element is designed.Based on the APF circuit model,the correctness of the proposed fault diagnosis method is proved.The system simulation results show that the algorithm can accurately diagnose open-circuit faults of single or multiple switching elements in APF based on hysteresis control.
作者
祝明秀
钟宁帆
翟艳强
ZHU Ming-xiu;ZHONG Ning-fan;ZHAI Yan-qiang(School of Electrical and Automation Engineering,Shandong University of Science and Technology,Qingdao 266590,China;State Grid Shandong Electric Power Company Huantai County Power Supply Company,Zibo 266400,China)
出处
《控制工程》
CSCD
北大核心
2022年第6期1145-1152,共8页
Control Engineering of China
关键词
有源电力滤波器
开路故障
滞环控制
故障诊断
Active power filter
open-circuit fault
hysteresis control
fault diagnosis
