It is applied in relay protection, system metering and analysis of power system. It has a close relation with the security and reliability of power system.
它被广泛应用于继电保护、系统监测、电力系统分析之中，关系到电力系统的安全性与可靠性。
Security and reliability of relay protection system are important factors for power system to operate safely.
继电保护系统的安全可靠是电力系统安全运行的重要保证。
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