高压电器2025，Vol.61Issue(1)：19-29,11.DOI:10.13296/j.1001-1609.hva.2025.01.003
基于分布式地电压测量的开关柜放电溯源方法
Location Method for Partial Discharge in Switchgear Cabinet Based on Distributed Transient Earth Voltage Measurement
摘要
Abstract
Transient earth voltage(TEV)detection is one of common methods to measure the partial discharge in switchgear cabinet.However,the TEV signal interference frequently arises between equipment due to the layout of the earthing system at site,thus making it difficult to locate the discharge source.In view of this issue,the electro-magnetic simulation models of the single switchgear cabinet and side-by-side switchgear cabinet of switch room of substation are constructed respectively to study the the optimal measurement point of TEV in case of unknown partial discharge source and the the location method for partial discharge in case of sharing the earthing system by the multi-ple switchgear cabinets.It is shown by the simulation result that in case of unknown partial discharge source the mea-suring point at the lower center of the front of the switchgear cabinet has the optimal measurement effect.As for the side-by-side switchgear cabinet with a common earthing system,the response amplitude of the same discharge pulse of each switchgear cabinet is attenuated significantly with the increase of distance of its partial discharge source.Therefore,the location of the partial discharge source can be achieved by constructing distributed sensor network un-der the simultaneous detection condition.Finally,the actual measurement performed at site of certain substation shows that the distributed simultaneous measurement method has good application effect and has provided valuable reference for the site application of TEV.关键词
局部放电/暂态地电压/电磁仿真/分布式传感器网络/放电定位Key words
partial discharge/transient earth voltage/electro-magnetic simulation/distributed sensor network/location for partial discharge引用本文复制引用
谢荣斌,薛静,靳斌,王瑞果,关浩斌..基于分布式地电压测量的开关柜放电溯源方法[J].高压电器,2025,61(1):19-29,11.基金项目
南方电网有限公司科技项目(GZKJXM20190127). Project Supported by the Science and Technology Project of China Southern Power Grid(GZKJXM20190127). （GZKJXM20190127）
