双馈风机综合保护的低电压穿越仿真研究  

Simulation Research on Low Voltage Ride Through Comprehensive Protection of DFIG

作　　者：刘引弟[1] LIU Yin-di(Inner Mongolia Technical College of Mechanics&Electrics,Hohhot 010070,China)

机构地区：[1]内蒙古机电职业技术学院,呼和浩特010070

出　　处：《价值工程》2022年第23期93-95,共3页Value Engineering

基　　金：院级课题“基于工业物联网的风力发电智能低电压控制系统研究”(编号:NJDZR1901)。

摘　　要：双馈风力发电机应用广泛,低电压穿越技术(LVRT)是风电并网稳定性的关键因素。本文提出将撬棒(Crowbar)保护和直流卸荷回路(Chopper)保护与网侧双环低穿策略相结合的应用,在转子交流侧采用Crowbar电路,可减少暂态冲击电流使对转子侧变流器的影响,直流侧增加卸荷(Chopper)电路,能够稳定直流母线电压;最后在PSCAD电磁暂态仿真平台中对其进行等值建模仿真验证。Doubly-fed wind turbines are widely used,and low-voltage ride-through technology(LVRT)is a key factor for the stability of wind power grid-connected.This paper proposes an application that combines Crowbar protection and DC unloading circuit(Chopper)protection with grid-side double-loop low-penetration strategy.The use of Crowbar circuit on the AC side of the rotor can reduce the transient inrush current and convert the current on the rotor side.In addition,the Chopper circuit is added on the DC side to stabilize the DC bus voltage.Finally,the equivalent modeling and simulation verification is carried out in the PSCAD electromagnetic transient simulation platform.

关 键 词：双馈风力发电机 低电压穿越 Crowbar保护 Chopper保护 双环控制 

分 类 号：TM315[电气工程—电机]