电力系统保护与控制2017，Vol.45Issue(6)：62-67,6.DOI:10.7667/PSPC160432
提高直驱永磁风机低电压穿越能力的控制策略
Comprehensive control strategy for improving low voltage ride through capability of permanent magnet synchronous generator
摘要
Abstract
In order to improve permanent magnet synchronous generators (PMSGs) low voltage ride through (LVRT) capability and operation stability after LVRT,a comprehensive control strategy (CCS) of PMSG based on variable resistance and power factor is proposed,which can be described as that,a series circuit of IGBT and variable-value unloading resistor is utilized in the DC side,a dynamic reactive power compensation device based Magnetically Controlled Reactor (MSVC) is utilized under long period faults,the series circuit and MSVC device are accessed according to the comparison of actual voltage value and preset limit voltage.According to the voltage drop level,the reactive power generated by PMSG is adjusted.A simulation model is established in PSCAD/EMTDC,based on parameters of an actual operational PMSG with the output power of 1.5 MW,the efficiency of the proposed control strategy is verified under different unloading resistances and power factors.The results shown that,not only the LVRT capability of PMSG can be enhanced,but also the operation stability after LVRT can be improved.关键词
直驱风电机组/低电压穿越/变阻值卸荷电路/变功率因数无功控制Key words
permanent magnet synchronous generator/low voltage ride through/dynamic chopper circuit/variable power factor reactive power control引用本文复制引用
张谦,李凤婷,蒋永梅,陈伟伟..提高直驱永磁风机低电压穿越能力的控制策略[J].电力系统保护与控制,2017,45(6):62-67,6.基金项目
国家自然科学基金项目(51267019,51467019)This work is supported by National Natural Science Foundation of China (No.51267019 and No.51467019). （51267019,51467019）
