电网故障诊断完全解析模型的解集评价与最优解求取

发布时间：2019-03-28 11:16

【摘要】：电网故障过程中保护和断路器的动作及其动作告警存在不确定性,致使基于电网保护规则解析的故障诊断模型存在多解问题,如何快速有效地求取最优解是电网故障诊断解析模型实用化的关键。针对此问题,提出一种求取电网故障诊断解析模型最优解的方法,通过解析保护和断路器动作的不确定性和告警信号的不确定性,构建完全解析模型的解集评价指标,将故障诊断问题转换为求取完全解析模型最优解的数学规划问题,然后利用保护和断路器的拒动、误动概率以及告警信号的误报和漏报概率等先验知识,采用随机优化算法求取最优解,并从最优解导出诊断结论。故障诊断算例和实际故障案例的诊断验证了所提出的完全解析模型求解方法的有效性以及相应故障诊断方法的容错性和实用性。
[Abstract]:In the process of power grid fault protection and the operation of the circuit breaker and the uncertainty of the action alarm, the fault diagnosis model based on the analysis of the power grid protection rule has many problems, and how to quickly and effectively obtain the optimal solution is the key to the practical application of the power grid fault diagnosis and analysis model. Aiming at the problem, a method for solving the optimal solution of a power grid fault diagnosis and analysis model is proposed, and the set evaluation index of a complete analysis model is constructed by analyzing the uncertainty of the protection and the action of the circuit breaker and the uncertainty of the alarm signal, the fault diagnosis problem is converted into a mathematical programming problem for obtaining the optimal solution of the complete analytic model, and then the optimal solution is obtained by adopting a random optimization algorithm by utilizing the prior knowledge of the protection and the rejection of the circuit breaker, the probability of false operation and the false alarm and the missing report probability of the alarm signal, And the diagnosis conclusion is derived from the optimal solution. The fault diagnosis example and the diagnosis of the actual fault case verify the effectiveness of the proposed method for solving the full analytic model and the fault-tolerance and practicability of the corresponding fault diagnosis method.
【作者单位】：三峡大学电气与新能源学院;华北电力大学电气与电子工程学院;
【基金】：湖北省自然科学基金项目(2013CFB219) 三峡大学科学基金项目(KJ2012B053)~~
【分类号】：TM711

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