继电保护接地及抗干扰几个问题探讨

Discussion on Several Problems of Relay Protection Grounding and Anti-interference

随着微机继电保护、综合自动化系统越来越先进,系统集成度越来越高,对电磁环境的要求也就不断提高,所以变电站二次系统抗干扰研究愈发得重要。对厂站建立等电位接地网概念和必要性、与主接地网及安全接地网关系、敷设施工等方面易混淆的几个问题进行了梳理和探讨。结合继电保护二次系统运行要求,对互感器接地的运行、二次抗干扰措施进行了探讨。

With the development of microcomputer relay protection and integrated automation system, the system integration degree is getting higher and higher and the demand on electromagnetic environment is also increasing. Therefore, the anti- interference study for substation secondary system becomes more and more important. Several problems which are easy to be confused are discussed, including the concept and necessity of establishing equipotential grounding grid in plant or substation, the relationship between main grounding grid and safety grounding grid, and laying construction. Based on the operation requirements of secondary system, the operation of transformer grounding and the measures of system anti-interference are analyzed.