A Novel Fault Isolation Scheme in Power System With Dynamic Topology Using Wide-Area Information

被引:7
作者
Zhang, Guangxiao [1 ]
Tong, Xiaoyang [1 ]
Hong, Qiteng [2 ]
Lu, Xuemin [1 ]
Booth, Campbell D. [2 ]
机构
[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 611756, Peoples R China
[2] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1XW, Lanark, Scotland
基金
英国工程与自然科学研究理事会;
关键词
Circuit faults; Circuit breakers; Fault diagnosis; Power system dynamics; Network topology; Power system stability; Reliability; Fault isolation; Floyd-Warshall algorithm; graph theory; power system; wide-area information; BACKUP PROTECTION; LOCATION TECHNOLOGY; LINE IDENTIFICATION; PLACEMENT; STABILITY;
D O I
10.1109/TII.2021.3095254
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The flexible and dynamic operation condition of the power system requires that the fault isolation scheme has sufficient adaptability. A novel fault isolation scheme based on wide-area information is proposed in this article. Based on graph theory, the adjacency matrices of the electrical components and circuit breakers are constructed. The real-time switch status data is exploited to reflect the dynamic changes of the network topology. Then, the tripping path of the circuit breaker connecting each protected electrical component is searched by the Floyd-Warshall algorithm to formulate the fault isolation set for all protected electrical components. The proposed approach is applied to fault isolation from a wide-area perspective, and it is not affected by system coordination and selectivity compared with the one based on local information. The effectiveness of the proposed scheme is verified on a power system with the typical electrical connection under the cases of a single fault, multiple faults, circuit breaker failure, and substation with the outage of dc power supply, and the case where the circuit breakers cannot trip. Since the tripping sequence of the circuit breakers is determined before the fault occurs, even with dynamic changes of the power system conditions, the proposed scheme can minimize the fault isolation zone with low fault clearance time.
引用
收藏
页码:2399 / 2410
页数:12
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