计及继电保护状态评估的电网故障诊断方法研究

Study on Fault Diagnosis Method of Power Grid Considering State Evaluation of Relay Protection

随着智能电网的快速发展,电网对隐藏的故障处理和诊断要有更好的适应性与准确性。以判断电网复杂故障为原则,论文主要针对电网复杂故障诊断模型和对目标函数进行探讨,提出了以电网复杂故障为目标的计及继电保护状态评估的复杂故障诊断的研究。搭建了电网故障诊断模型。根据模型产生对目标函数评估的计及继电保护失效模式,采用染色体遗传算法求得最优解故障,通过评估结果对电网故障进行诊断。最后,利用所提出的模型和算法,开发出在线电网复杂故障诊断系统。通过测试证实了该系统的合理性与实用性。

With the rapid development of the smart grid,the power grid to hide the fault handling and diagnosis to have better adaptability and accuracy. In order to judge the complex fault of power system,this paper mainly focuses on complex fault diagnosis model of power grid and discusses the objective function,and puts forward the research of complex fault diagnosis which takes relay protection state assessment as objective. A fault diagnosis model of power grid is established. According to the model,the failure mode of relay protection is taken into account in the evaluation of the objective function. The genetic algorithm is used to obtain theoptimal solution,and the fault is diagnosed by the evaluation result. At last,the complex fault diagnosis system of on-line power grid is developed by using the proposed model and algorithm. The system is proved to be reasonable and practicable.