Smart Substation Optical Fiber Virtual and Real Loop Mapping and Fault Diagnosis Technology

doi:10.11930/j.issn.1004-9649.202303071

Abstract

Abstract:

At present, most of the smart substation communication uses optical fiber to link the secondary equipment, and the link relationship between the devices is not intuitive, resulting in difficulty in monitoring and diagnosis. In order to solve the problems of secondary virtual loop visualization, loop status monitoring, fault location and fault type identification in the operation and maintenance of smart substations, a smart substation optical fiber virtual and real loop mapping solution is proposed based on the breadth-first search algorithm to realize the visual display of secondary virtual loop. At the same time, the breadth priority search algorithm is used to carry out fault inference and delimit the fault area. The D-S evidence theory is used to accurately locate the faults based on the mass data of smart substation and multi-information fusion, and the evidence table method is used to finally determine the fault types, thereby meeting the practical application needs of the operation and maintenance of secondary equipment in smart substations.

Key words: smart substation, virtual loop, breadth-first search, fault location, fault type identification, multi-information fusion, D-S evidence theory

Ming ZHONG, Jun TAO, Xunyu LIU, Yi YANG, Bingyuan YANG. Smart Substation Optical Fiber Virtual and Real Loop Mapping and Fault Diagnosis Technology[J]. Electric Power, 2023, 56(10): 171-178.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202303071

https://www.electricpower.com.cn/EN/Y2023/V56/I10/171

Figures/Tables 8

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状态指标		参数范围
接收端口光强/dB		–10~30
发送端口光强/dB		–15~25
流量		低于平均流量50%
误码率		10^–10

状态指标		参数范围
接收端口光强/dB		–10~30
发送端口光强/dB		–15~25
流量		低于平均流量50%
误码率		10^–10

状态名称	故障类型
状态名称	断路	乱码	网络阻塞
断链告警	1		1
异常告警		0
光功率	1
误码率		0
流量	1		1
举证值	3	0	2

状态名称	故障类型
状态名称	断路	乱码	网络阻塞
断链告警	1		1
异常告警		0
光功率	1
误码率		0
流量	1		1
举证值	3	0	2

编号	虚回路名称	端口集合
L₁	母差远跳线路	{P₁/A-1, S₁/1, S₁/3, S₂/5, S₂/2, P₂/A-3}
L₂	遥测1	{MU₂/A-1, S₂/3, S₂/1, CL/A-1}
L₃	遥测2	{MU₁/A-1, S₁/2, S₁/3, S₂/5, S₂/1, CL/A-1}
L₄	遥信	{IED/A-3, S₂/4, S₂/1, CL/A-1}
L₅	母线直采直跳	{MU₁/A-1, P₁/A-3, IED/A-1}
L₆	线路直采直跳	{MU₂/A-2, P₂/A-2, P₂/A-1, IED/A-2}
L₇	母线直采	{MU₁/A-2, P₁/A-2}
L₈	母线刀闸位置	{IED/A-1, P₁/A-3}
L₉	线路启动失灵	{P₁/A-1, S₁/1, S₁/3, S₂/5, S₂/2, P₂/A-3}
L₁₀	线路开关位置	{IED/A-2, P₂/A-1}