长距离500kV线路操作过电压限制措施选择与验证  

Selection and Verification of the Limiting Measures About Switching Overvoltage for Long Distance 500 kV Transmission Line

作　　者：方建[1] 

机构地区：[1]福建省电力勘测设计院,福建福州350001

出　　处：《电网与清洁能源》2016年第1期32-35,41,共5页Power System and Clean Energy

摘　　要：在500 k V线路的系统操作过电压超过相关规范规定要求时,必须对其采取限制措施以保证供电系统的安全可靠性。分析操作过电压的限制措施、氧化性避雷器电位分布,结合工程实例分析采取氧化性避雷器限制措施前后的过电压变化以及避雷器参数的取值;同时验证在不采取限制措施情况下输电线路绝缘设计是否满足要求。结果表明,这2种不同的操作过电压处理方式,均可作为解决操作过电压水平超过要求值时的解决方案。When the switching overvoltage of the 500 k V transmission line exceeds the specified value,proper measures must be taken to ensure the safety and reliability of the power supply system. In this paper, the limiting measures of the switching overvoltage and the potential distribution of the MOA are analyzed,and based on the actual engineering examples,the overvoltage variation and the parameters of the MOA before and after the MOA measure are taken are also analyzed,and at the same time whether the insulation design of the transmission line meets the requirements without the restriction measures taken is verified. The result suggests that these two operating modes in the switching overvoltage can be used as a solution when the switching overvoltage exceeds the specified value.

关 键 词：长距离500kV线路 操作过电压 氧化性避雷器 电位分布 

分 类 号：TM757[电气工程—电力系统及自动化]