一种关键线路和重要保护辨识的新方法

提出了一种基于连锁故障模型和风险理论对系统中关键线路和重要保护的辨识方法。该方法首先利用Markov状态空间理论建立了计及继电保护装置动作逻辑的初始状态概率模型,从而得到连锁故障初始阶段的系统状态。然后,建立了基于实时运行条件下的线路、发电机和负荷的可靠性模型来模拟后继故障。最后,利用风险理论对线路和线路保护进行风险辨识。算例仿真结果验证了算法的正确性和可行性。

A novel method for key Line and important protection identification

Based on the cascading failure model and risk theory,a method for identifying critical path and important protection in power system is proposed.The method uses the Markov state space theory to establish the initial state probability model to obtain the system state taking the action logic of the protection devices into account.And then it establishes line reliability model,generator reliability model and load reliability model based on real-time operating conditions to simulate subsequent failure.Finally,it simulates cascading failures to identify line and line protection for risk by usiny risk theory.Results of a numerical in example prove the method correct and feasible.