摘要
针对变流器发生开路故障后系统的运行特性,提出利用电流的Park矢量模值对电流绝对值的平均值进行归一化,用归一化后的数值和电流平均值的正负对风电系统变流器的单开路故障进行诊断。仿真和实验结果表明该文提出的故障诊断方法不仅能准确地对变流器的开路故障进行诊断,且能防止负载突变、电网电压骤降时误诊断的发生。
Aiming at the operating characteristics of the system after occurring the open-circuit fault of the converter, normalizing the average value of the current absolute value using the Park vector mode value of the current was proposed. The normalized value and positive or negative of the average current were used to diagnose single open-circuit fault of wind power system converters. The simulation and experimental results show that proposed fault diagnostic method can diagnose open-circuit faults of converters accurately and prevent misdiagnosis when the load sudden changes and the nosedive grid voltage happens.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第12期3392-3398,共7页
Acta Energiae Solaris Sinica
基金
国家自然基金(61102039
51577046)
国家重点基础研究发展(973)计划(2012CB215106)
湖南省自然科学基金(14JJ7029)
浙江省控制科学与工程重中之重一级学科开放基金
关键词
永磁直驱式风电系统
变流器
开路故障
故障诊断
permanent magnet direct drive wind turbine system
converter
open-circuit fault
fault diagnostic
