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发明公开
CN110783898A 一种交流环网供电动态加速过流保护方法及保护装置 有权

一种交流环网供电动态加速过流保护方法及保护装置
摘要：
本发明提供了一种交流环网供电动态加速过流保护方法及保护装置，保护方法为当本侧保护装置接收到对侧保护装置的CT断线信号，且动态加速过流保护满足启动条件，控制与所述本侧保护装置对应的断路器在动态加速过流保护T2时限动作跳闸；当本侧保护装置没有接收到对侧过流启动信号和对侧CT断线信号，且本侧保护装置与对侧保护装置之间的通信通道正常，动态加速过流保护满足启动条件时，控制与所述本侧保护装置对应的断路器在动态加速过流保护T1时限动作跳闸；其中，T2>T1，T1为本侧保护装置正常运行时的动态加速过流保护的动作延迟时间。本发明的保护方法能够避免了故障切除范围过大，提高交流环网供电的可靠性。
摘要（英）：

The invention provides an AC looped network power supply dynamic acceleration overcurrent protection method and a protection device. The protection method comprises the following steps: when a local side protection device receives a CT disconnection signal of an opposite side protection device and dynamic acceleration overcurrent protection meets a starting condition, a circuit breaker corresponding to the local side protection device is controlled to act and trip in a dynamic acceleration overcurrent protection T2 time limit; when the local side protection device does not receive the oppositeside overcurrent starting signal and the opposite side CT disconnection signal, the communication channel between the local side protection device and the opposite side protection device is normal and the dynamic acceleration overcurrent protection meets the starting condition, a circuit breaker corresponding to the local side protection device is controlled to act and trip in the dynamic acceleration overcurrent protection T1 time limit, wherein T2 is greater than T1, and T1 is the action delay time of dynamic acceleration overcurrent protection when the local side protection device operatesnormally. By means of the protection method, the situation that the fault removal range is too large can be avoided, and the reliability of AC looped network power supply is improved.

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