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继电保护可以充分地利用电网内的冗余测量信息进行故障识别,对电网故障进行快速隔离。考虑到电网在建设过程中的成本及经济效益问题,通常需要快速断路器和普通断路器配合使用,而快速断路器较普通断路器的速度快得多,这就导致断路器在串联使用时,存在时间配合问题,暴露出速动性和选择性的矛盾。基于此,提出和设计了一种基于多信息融合的快速继电保护算法,该算法根据电网结构形成故障识别编码,并利用网络中断路器速度相关参数信息,构建适应度函数和状态期望函数,解决快速断路器和普通断路器串联使用时的时间配合问题,将速动性和选择性统一,达到治理晃电等实际目的。
Relay protection can make full use of redundant measurement information within the power grid for fault identification and fast isolation of grid faults. Taking into account the cost and economic benefits of the power grid in the construction process, it is usually necessary to use a fast circuit breaker in combination with an ordinary circuit breaker. However, the quick circuit breaker is much faster than an ordinary circuit breaker, which causes the circuit breaker to be used in series, There is a problem of time matching, exposing the contradiction between quick and selective. Based on this, a fast relay protection algorithm based on multi-information fusion is proposed and designed. The algorithm forms a fault identification code according to the structure of the power grid and constructs the fitness function and the state expectation function by using the information about the speed-related parameters of the circuit breaker in the network. Solve the problem of time matching when the quick circuit breaker and the ordinary circuit breaker are used in series, and combine the quick action and the selectivity selectively to achieve the actual purpose of controlling the electric power.