基于本地多信息的后备保护研究

后备保护是电力系统保护中的重要组成部分,但随着电力系统的日益增大,对采用阶梯型时限整定后备保护,很难实现保护范围与时间整定配合。为解决上述问题,提出一种基于本地多信息量的后备保护方法,揭示了变电站故障与故障表现的信息间的关系,用关系矩阵实现信息融合。对方法的构成、动作原理及相关问题进行了详细介绍。分析表明,该方法简洁易行,具有较强的容错性和可扩展性。

Study on local multi-information backup protection

Backup protection is of importance in power system protection.As power systems grow larger,it becomes difficult to achieve range and time coordination in!backup protection according to step principle.To cope with those problems,a new backup protection scheme based on local multi-information is proposed.It analyzes the relationship between substation fault and fault information and presents the information fusion by relation matrices.Then the structure,decision-making process and some topics of the scheme are elaborated.Analysis shows that this scheme is of simpleness and good traits on fault tolerant and expansion.