摘要
气体绝缘变电站(gas-insulated substation,GIS)中隔离开关操作产生的瞬态电磁过程是影响智能组件正常工作的主要电磁干扰源,其在二次电缆的传导耦合和辐射耦合干扰分量大的大小研究较少。通过252 k V GIS真型实验平台模拟了变电站快速瞬态过电压(very fast transient overvoltage,VFTO)产生电磁干扰;测量了不同屏蔽措施条件下二次电缆两端干扰电压水平,得到了电缆端口干扰电压的时域和频域特性。通过统计分析发现辐射耦合是干扰电压产生的主要方式;因此为保证二次电缆安全稳定工作,变电站二次电缆应采取良好的屏蔽措施。
The transient electromagnetic process caused by switching operation in gas-insulated substation is the main interference source which affects the intelligent components to normally work. The components coupled to sec-ondary cable by conduction and radiation interference were seldom studied. Experimental study been has carried out. The transient interference source is produced on 252 kV GIS experimental platform, and the terminal interfer-ence voltages of secondary cables are measured under the conditions of different shielded schemes. Through the sta-tistical analysis time domain and frequency domain characteristics of the interference voltage at the cable terminal are obtained, and found that the radiation coupling is the main way of interference. In order to ensure the safety and stability of substation, the secondary cable should take good shield measures.
出处
《科学技术与工程》
北大核心
2017年第15期234-237,共4页
Science Technology and Engineering
基金
国家自然科学基金(51377057)
南方电网科技项目(GZM2015-006)资助
关键词
气体绝缘变电站
二次电缆
电磁骚扰耦合方式
屏蔽
gas-insulated substation secondary cable electromagnetic interference coupl ing shield
