基于电网结构异常变化的故障诊断方法研究

Research of Power System Fault Diagnosis Method Based on Abnormal Changes in the Structure of Power Grid

本文首先概述了电网故障诊断领域国内外当前的研究成果,提出了一种基于电网异常结构变化的故障诊断方法。该方法通过分析电网运行中正常操作和故障跳闸反应于功率潮流上的区别,在电网结构异常变化前后的故障设备确定算法,并以此为逻辑起点实现对于继电保护动作行为和断路器动作行为的评估,利用故障信息、异常信息和状态量变化信息三者之间关系,建立辨别SCADA系统中误发保护信息的纠错模型,信息纠错模型与电网故障诊断方法相配合,收到了良好的效果。

The main current research achievements for power system diagnoses are summarized, a fault diagnosis method based on abnormal changes in the structure of power grid is proposed in this paper. Through the analysis of the power flow difference between normal operation and fault tripping, a fault equipment confirmed algorithm based on abnormal changes in the structure of power grid is developed, the evaluation of the action of the related relay protection and circuit breaker is realized by taking the confirmed fault equipment as the beginning of logic analysis. In order to identify the fault information sent out by SCADA system, accident information, abnormal information and status changing information are used in a identify fault information model. The model analyses these three parts information and identify their validity. The model combining with the fault diagnosis method received good results.