基于遗传退火算法的主动式直流配网故障定位方案  

Fault Location Scheme of Active DC Distribution Network Based on Genetic Annealing Algorithm

作　　者：韩笑[1] 汪缪凡 蒋剑涛 夏寅宇 丁煜飞 齐沛峰 HAN Xiao;WANG Miaofan;JIANG Jiantao;XIA Yinyu;DING Yufei;QI Peifeng(School of Electrical Engineering,Nanjing Institute of Technology,Nanjing 211167;Jingjiang Power Supply Branch,State Grid Jiangsu Electric Power Co.,Ltd.,Jingjiang 214500)

机构地区：[1]南京工程学院电力工程学院,南京211167 [2]国网江苏省电力有限公司靖江市供电分公司,靖江214500

出　　处：《计算机与数字工程》2023年第1期273-276,共4页Computer & Digital Engineering

基　　金：国家自然科学基金项目“基于换流器与电网控制保护协同的直流配电网保护及故障恢复策略研究”(编号:52107098)资助

摘　　要：柔性直流配电网中,换流器器件承受故障电流的能力较差,故障后,需要在数毫秒内闭锁换流器,故障暂态持续时间短,导致依靠故障暂态信息的测距方案精度难以达到要求。为解决该问题,首先全桥换流器可控性高,在故障限流后,可向线路主动注入特征信号,来替代持续时间短且不稳定的暂态信息;再通过识别线路参数来实现故障定位,并构造适应度函数,结合遗传退火算法,避免采集误差影响定位精度;最后通过仿真验证,过渡电阻对该方案影响较小,且具有较高的精度。In flexible DC distribution network,the ability of converter devices to withstand fault current is poor.After the fault,the converter needs to be locked in milliseconds,and the fault transient duration is short,which makes it difficult for the ac⁃curacy of the ranging scheme relying on fault transient information to meet the requirements.To solve this problem,first of all,the full-bridge converter has high controllability.After fault current limiting,the characteristic signal can be actively injected into the line to replace the transient information with short duration and instability.The mathematical model of inter-pole short circuit fault is established,the fault location is realized by identifying the line parameters,and the fitness function is constructed.Combined with genetic annealing algorithm,the acquisition error can be avoided from affecting the location accuracy.Finally,the simulation results show that the transition resistance has little influence on this scheme and has high accuracy.

关 键 词：柔性直流配电网 遗传退火算法 注入式 参数识别 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]