500kV变电站开关操作瞬态电场测量与研究

变电站断路器和隔离开关操作会产生瞬态电场。该文对国内正在调试的两座500kV变电站开关操作产生的瞬态电场进行了测量。这是国内首次进行现场测量。本次测量使用三维球形有源瞬态电场探头，该探头最大可测48kV/m。测量项目包括隔离开关分合空载母线和短线、断路器合长线和投空载变压器等。对测量的数据进行分析获得关于断路器和隔离开关操作产生瞬态电场的一些重要特征。这些结果对变电站电磁干扰分析和保护与控制设备抗扰度研究具有重要的理论意义和实用价值。

MEASUREMENTS AND RESEARCH OF SWITCHING OPERATION TRANSIENT ELECTRIC FIELD IN 500kV SUBSTATIONS

Switching operations in substations, including circuit breaker operations and disconnect switch operations, can generate transient switching electric fields. We measured switching transient electric fields in the field of two 500kV substations. This is the first switching transient electric field measurement in the field of 500kV substations in china. A three-dimensional electric field sensor which is spherical and active was used in the measurement, and can measure maximal value of 48kV/m. The electric fields generated by several kinds operations, including energizing and de-energizing open bus sections and the short line by operating disconnects, energizing open long transmission lines and energizing open transformer by operating circuit breakers, were measured. After analyzing the measured data, some important characteristics of switching fields were obtained. These characteristics are useful for theore- tical analysis and practical engineering interference analysis in power substation and susceptibility experiments of protection and control equipments.