Fault Location Method for Secondary System of Smart Substations Based on Network Flow Algorithm and Deep Neural Network

doi:10.11930/j.issn.1004-9649.202502061

Abstract

Abstract:

The existing intelligent substation secondary system fault location method relies on specific types of fault feature quantities, lacking the ability toively process multiple fault types. It is unable to quickly modify the scheme when facing dynamic changes in the power network. To address this challenge, a fault location method based on the network algorithm and deep neural network (DNN) is proposed. A new fault type classification method is adopted, and the simple fault, pseudo-complex fault, and complex fault are re. A fault feature coding and matrix relationship model are constructed, and the network flow algorithm is introduced to solve the problem of fuzzy positioning of link fault and node fault in complex fault. The network flow algorithm is deeply integrated with the deep neural network model to achieve accurate positioning of intelligent substation secondary system faults. Through simulation example comparison, it is found that the method can not only improve the accuracy of complex fault recognition and shorten the fault location time, but also effectively cope with the dynamic changes of the power system, and improve the fault location.

Key words: smart substation, network flow algorithm, deep neural network, fault location

TAO Jun, ZHONG Ming, ZHANG Yi, LIU Feng, WU Yuzhu, XIA Zhenxing. Fault Location Method for Secondary System of Smart Substations Based on Network Flow Algorithm and Deep Neural Network[J]. Electric Power, 2025, 58(9): 68-78.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202502061

https://www.electricpower.com.cn/EN/Y2025/V58/I9/68

Figures/Tables 15

References 27

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故障类型数	无故障	简单故障	复杂故障
0	√	×	×
1	×	√	×
2	×	×	√
3	×	×	√
4	×	×	√

故障类型数	无故障	简单故障	复杂故障
0	√	×	×
1	×	√	×
2	×	×	√
3	×	×	√
4	×	×	√

故障类型数	特定故障信息	简单复杂类型
0		无故障
1	有	简单故障
1	无	复杂故障
2	有	伪复杂故障
2	无	复杂故障
3	有	伪复杂故障
3	无	复杂故障
4	有	伪复杂故障
4	无	复杂故障

故障类型数	特定故障信息	简单复杂类型
0		无故障
1	有	简单故障
1	无	复杂故障
2	有	伪复杂故障
2	无	复杂故障
3	有	伪复杂故障
3	无	复杂故障
4	有	伪复杂故障
4	无	复杂故障

编号	故障名称	故障特征信息
0	无故障	无故障
1	合并单元电源模块故障	合并单元电源失电报警
2	合并单元GOOSE_A网网络风暴	合并单元GOOSE_A网网络风暴
3	合并单元I/O插件故障	保护SV/GOOSE总告警，保护SV/ GOOSE中断，保护闭锁，重合闸闭锁等
4	智能终端内存校验出错	智能终端内存校验出错
5	智能终端BO1_ GOOSE_A网网络风暴	智能终端BO1_GOOSE_A网网络风暴
6	智能终端I/O插件故障	智能终端／保护GOOSE通信中断，智能终端／保护GOOSE总告警等
7	保护装置对时异常	保护装置对时异常
8	保护I/O插件故障	保护SV/GOOSE总告警，保护SV/GOOSE中断，保护闭锁，重合闸闭锁等
9	合并单元到保护装置链路故障	合并单元/保护SV/GOOSE总告警，合并单元/保护SV/GOOSE中断等
10	合并单元到SV网链路故障	合并单元SV/GOOSE总告警，合并单元SV/GOOSE中断等