开关投切过程建模及其在配网故障诊断算法测试中的应用

Switching Modeling and Application in Fault Diagnosis Algorithm Testing of Distribution Network

配电网故障诊断是确定故障位置、提高故障处理效率和降低停电损失的重要手段.目前,在故障诊断算法设计与测试过程中较少考虑开关操作等干扰的影响,造成算法在实际应用中易误动、用户体验差.针对配电网开关分闸的暂态过程进行详细分析,结合Mayr与Helmer模型对开关投切过程建模,并在PSCAD中生成仿真波形与现场操作过程暂态波形进行对比分析.在模型精准性检验基础上,构建了包含开关操作过程的配电网典型故障算例;与现有常用模型相比,所提模型可以仿真生成贴近现场开关投切过程的扰动数据,可用于故障诊断算法的可靠性检验.最后通过结果分析,对优化故障诊断算法和测试流程提出了针对性建议.

Fault diagnosis in power distribution networks is crucial for fault location,enhancement of fault processing efficiency,and reduction of power outage losses.Currently,the impact of switch operations and other interferences is seldomly considered in fault diagnosis algorithm designing and testing,which may lead to frequent mal-function and poor performance in practical applications.In this paper,a detailed analysis and modeling of the transient process of switch operation in distribution networks is proposed with the combination of the Mayr and the Helmer models.The transient waveform of the on-site operation process is compared and analyzed with the simulation waveforms generated in PSCAD.Based on the accuracy verification of the model,typical fault scenarios in distribution networks,including switch operation processes,are constructed for fault diagnosis algorithm tests.Compared to the traditional model,the model proposed can simulate and generate disturbance data close to the on-site switch operation process for reliability testing of fault diagnosis algorithms.Finally,several suggestions for optimizing the fault diagnosis algorithm and testing process are proposed through result analysis.