含双馈风力发电机组的配电网故障特征研究  

Research on Fault Characteristics of Distribution Networks with Doubly-Fed Induction Generator Wind Turbines

作　　者：甘恭维 GAN Gongwei(Wind Power Branch,Hubei Electric Power Co.,Ltd.,State Power Investment Corporation,Wuhan 430060,Hubei Province,China)

机构地区：[1]国家电投集团湖北电力有限公司风电分公司,湖北武汉430060

出　　处：《电力与能源》2024年第6期705-708,共4页Power & Energy

摘　　要：风力发电系统接入电网的位置和功率均具有随机性,一旦配电网发生故障,传统的三段式电流保护装置可能不再适用,导致继电保护装置的性能受损,容易发生误动作。针对双馈风力发电机组的数学模型和控制策略,推导了三相配电网发生对称短路故障时故障电流的特性,并着重研究了具有低电压穿越能力的双馈风力发电机组在故障下的输出电流特性。为验证文中提出的算法,搭建了仿真模型。仿真结果表明:相比于传统的电力系统,双馈风力发电机输出的电流具有幅值衰减、频率偏移、谐波含量高等特点。The integration of wind power generation systems into the grid is random in terms of both location and power output.When a fault occurs in the distribution network,traditional three-stage current protection devices are no longer applicable,which affects the performance of the relay protection system and may lead to malfunc-tions.This paper derives the fault current characteristics of a three-phase distribution network in the event of a symmetrical short-circuit fault,considering the mathematical model and control strategy of doubly-fed induction generator(DFIG)wind turbines.It also focuses on the fault current characteristics of DFIG wind turbines with low-voltage ride-through capability under fault conditions.A simulation model is built to verify the proposed algo-rithm.The simulation results show that,compared to traditional power systems,the current output of DFIG wind turbines exhibits characteristics such as amplitude attenuation,frequency shift,and high harmonic content.

关 键 词：双馈风力发电机组 故障电流特性 分布式发电系统 

分 类 号：TM315[电气工程—电机]