广域后备保护故障识别方案  

Fault identification scheme for wide-area backup protection

作　　者：王艳[1] 金晶[1] 焦彦军[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《电力自动化设备》2014年第12期70-75,99,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51307059);中央高校基本科研业务费专项资金资助项目(10QG08)~~

摘　　要：在广域信息基础上,提出了一种基于集中式结构的故障识别方案,根据各序分量排序情况确定故障区域,利用方向和纵差原理来判别故障元件。启动方式保证了经高阻短路故障情况下保护启动的灵敏性;故障区域划分方法既能缩小故障搜索范围,又能准确涵盖各故障元件;故障判别算法能够快速、准确地识别出线路及母线的简单、复合故障。提出了在断路器拒动、一点或一个站信息丢失情况下的故障识别策略。基于河北南网系统实际参数和运行断面进行了大量仿真,仿真结果验证了该方案的合理性和有效性。Based on the wide-area information,a fault identification scheme with centralized structure is proposed for the backup protection,which detects the faulty zone according to the component ranks of three sequences and identifies the faulty element based on the directional and longitudinal differential principle. Its startup mode ensures the protection sensitivity of short circuit fault with high transition resistance,its fault zone partition method reduces the fault search range while covers all fault elements properly,and its fault identification algorithm detects both simple and complex faults of line and bus quickly and precisely. The fault identification strategy is proposed for the refuse-to-act of breakers and the information loss of one line or one station. Simulations are carried out based on the parameters and operational section of Southern Hebei Power Network and the simulative results verify the rationality and validity of the proposed scheme.

关 键 词：电力系统 广域后备保护 继电保护 集中式结构 序分量 信息丢失 故障分析 

分 类 号：TM773[电气工程—电力系统及自动化]