基于主动式IGBT型Crowbar双馈风力发电系统LVRT仿真研究.pdf

第38卷第23期 电力系统保护与控制 V01．38No．23 兰Q!!生!三旦!旦 ￡旦竺!兰z!!!里呈翌!!￡垒竺翌垒璺i￡竺璺塑! 望竺：!：兰Q!Q 基于主动式lGBT型Orowbar的双馈风力发电系统 LVRT仿真研究 苏平1，张靠社2 (1．西北电网有限公司西安输变电运行公司，陕西西安710075；2．西安理工大学水利水电学院，陕西西安710048) 能有效抑制转子过电流、直流母线过电压以及电磁转矩的振荡，并可在故障时向电网注入无功电流以帮助电网电压的恢复， 使DFIG实现低电压穿越． 关键词；双馈感应电机；电压跌落；风力发电；Crowbar；低电压穿越 Simulationresearchfor ofDFIGwithactiveIGBTCrowbar LyRT SU Kao．she2 Pin91．ZHANG (1．Xi’anTransmissionandTransformation ChinaGrid 71 Operation Limited,Xi’an0075，China； Company，NorthwestCompany 2．InstituteofWaterResourcesand 710048，China) Hydro—electricEngineering,Xi’anUniversityofTechnology，Xi’an AbstractsTheLVRTcontrol and schemesofDFIGarcdiscussedincondRionexternal the strategy protection oflarge voltagedip．On basisof activeIGBTCrowbarcircuit aswellastheeffectoftheCrowbarcircuittothefault topology voltage analyzing during鲥d DFIGmathematicalmodelwith the is andthecontrolmodelofLVRTis considering adopted dip，the changedgridvoltage established．The ofCrowbarisresearchedindetail simulation．Thesimulationresults Crowbar switchingstrategy during veri母that circuitandthecontrol areactiveand thatCrowbarcontrol couldlimittheovercurrentintherotorandtheover strategy prove strategy oftheDCbusaswellasthetransiemoscillationofthe reactivecurrentis voltage