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随着电网规模的不断扩大以及微机保护的广泛运用,对继电保护运行可靠性提出了更高的要求,任何设备不得在无保护情况下运行,这不仅对继电保护装置本身提出了较高的要求,同时也对保护装置的直流电源提出了更高的要求。本文从一起变电站综合自动化改造过程中发生的断路器拒动现象来分析改造过程中遇到的直流电源方面的问题,并探讨直流电源在变电站继电保护中的优化配置方案。
With the continuous expansion of the power grid and the extensive use of microcomputer protection, higher requirements are placed on the reliability of the protection of the relay. Any equipment can not be operated without any protection. This not only provides higher protection for the relay itself Requirements, but also to the protection of the DC power supply put forward higher requirements. This paper analyzes the problem of DC power encountered in the process of transformation from a phenomenon of circuit breaker refusing that occurs during the process of comprehensive automation transformation of substation and discusses the optimal configuration scheme of DC power supply in substation relay protection.