Relay protection system plays a very important role for the normal operation of power system. This article studies the reliability of relay protection and discusses its risk assessment, providing reference for the normal and orderly development of power system.%继电保护系统对电力系统的正常运转起到了很重要的作用。本文通过研究继电保护的可靠性来探讨其风险评估，为电力系统的正常有序发展提供参考。
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