考虑复故障的有源配电网故障定位方法  

Fault Location Method for Active Distribution Networks Considering Combination Faults

作　　者：张健磊 高湛军[1] 陈明 魏振 安树怀 Zhang Jianlei;Gao Zhanjun;Chen Ming;Wei Zhen;An Shuhuai(Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University,Jinan 250061 China;State Grid Qingdao Power Supply Co.Ltd,Qingdao 266000 China)

机构地区：[1]电网智能化调度与控制教育部重点实验室(山东大学),济南250061 [2]国网青岛供电公司,青岛266000

出　　处：《电工技术学报》2021年第11期2265-2276,共12页Transactions of China Electrotechnical Society

基　　金：国家电网有限公司总部科技项目资助(基于综合能源系统的智能配电网弹性技术与应用基础研究52060019001H)。

摘　　要：配电网受到极端扰动后可靠故障定位是提升配电网供电可靠性的重要手段。在极端扰动中,配电网中发生复故障的概率增大,主要体现在故障重数多、故障类型多、高阻接地等特征。文章提出一种考虑复故障的有源配电网故障定位方法。基于μPMU优化配置下的区域划分,形成各个监测域。通过搜索算法确定可疑监测域,并启动故障定位算法,利用不平衡电流分量幅值比较的故障区段检测判据定位故障。通过PSCAD/EMTDC和Matlab,验证了该方法不受故障位置和故障类型的影响,适用于多重、多类型故障等复杂场景,且有较高的抗过渡电阻能力。Reliable fault location is an important means to improve the power supply reliability of distribution networks after extreme disturbance.In extreme disturbance,the probability of combination fault in distribution networks increases,mainly reflected in the features of high fault multiplicity,multiple fault types and high resistance grounding.In this paper,a fault location method for active distribution networks considering combination faults is proposed.Through the area division based on optimalμPMU configuration,each monitoring area is formed.The suspicious monitoring area is determined by the search algorithm criterion,and the fault location algorithm is started.The fault section detection criterion comparing the amplitude of the unbalanced current component is used to locate the fault.Through PSCAD/EMTDC and Matlab,it is verified that this method is not affected by fault location and fault type,and is suitable for complex scenarios such as combination and multi-type faults.Moreover,it has high resistance against transition resistance.

关 键 词：复故障 可疑监测域 不平衡电流分量 故障定位 广域相量测量 

分 类 号：TM77[电气工程—电力系统及自动化]