面向大规模风电接入的继电保护策略建模与仿真  

Modeling and simulation of relay protection strategy for large-scale wind power access

作　　者：阿地利·巴拉提 樊雅文 王密娜 倪宏坤 杨斌 ADILI Barati;FAN Yawen;WANG Mina;NI Hongkun;YANG Bin(State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830063,China;State Grid Hami Power Supply Company,Hami 839000,China)

机构地区：[1]国网新疆电力有限公司,新疆乌鲁木齐830063 [2]国网哈密供电公司,新疆哈密839000

出　　处：《电子设计工程》2023年第23期171-175,共5页Electronic Design Engineering

基　　金：国网新疆电力有限公司科技项目(SGZJ0000KXJS1800376)。

摘　　要：风力电动机通常作为分布式电源并入主配电网中,针对传统配电网继电保护策略无法解决并网带来的功率方向随机性及系统状态改变等问题,文中在DFIG内部的保护模块中加入自适应电流保护策略,这样不但抗干扰性强,且可自动判断电网风机的存在状态,同时还能加快熔断后恢复速度。而在风电场内部系统保护模块中加入主从机纵连保护策略,便可通过分机功率方向对电路中故障发生的位置进行准确判断。仿真结果表明,所提继电保护策略相较传统方法的熔断恢复时间缩短了0.15 s,且在大规模系统中也能够对故障发生的位置进行准确地判断。Wind motors are usually used as distributed power sources and incorporated into the main distribution network.For the traditional distribution network relay protection strategy,it can not solve the problems of power direction randomness and system state change caused by grid connection.In this paper,the adaptive current protection strategy is added to the internal protection module of DFIG,which not only has strong anti-interference,but also can automatically judge the existing state of power grid fans,but also speed up the recovery speed after fusing.Adding the longitudinal protection strategy of the master-slave machine to the internal system protection module of the wind farm can accurately judge the location of the fault in the circuit through the power direction of the extension.The simulation results show that the fuse recovery time of the relay protection strategy proposed in this paper is shortened by 0.15 s compared with the traditional method,and the location of the fault can also be accurately judged in large-scale systems.

关 键 词：继电保护 自适应电流保护策略 纵连保护策略 风力发电 分布式电源 

分 类 号：TN-9[电子电信]