When a power component (such as a generator, a line, etc.) in the power system or a power system itself fails to endanger the safe operation of the power system, a warning signal can be issued to the running duty person in time, or a trip command can be directly issued to the controlled circuit breaker. An automated measure and device that terminates the development of these events is generally referred to as a relay protection device.
As the latest protection of relay protection, microcomputer protection plays an important role in the power system and directly affects the safe operation of the power system.
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