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为了满足智能配电网在故障发生后,能够对故障进行实时准确的定位,及时排除故障恢复对负荷的供电,提出了基于IDT智能配电终端和马氏距离算法的新故障定位方法。以IDT智能配电终端作为故障定位特征电气量实时采集提取核心模块,经运算获得故障时特征电气量变化显著性概率P值,初步判断故障模式和可能故障部位后,通过马氏距离运算获得准确定位故障模式和故障部位。以标准IEEE9节点系统对配电故障定位系统进行性能检测分析,检测结果显示,该检测算法系统对智能配电网故障具有良好的识别诊断能力,且具有算法简单、计算量小等优点,能够满足智能配电网在线状态监测和故障准确定位需求。
In order to meet the needs of intelligent distribution network after the fault occurs, the fault can be located in real time and the power supply to the load can be eliminated in time. A new fault location method based on IDT smart distribution terminal and Mahalanobis distance algorithm is proposed. Taking IDT intelligent distribution terminal as the fault location characteristic electrical quantity to collect and extract the core module in real time, the P value of the characteristic electrical quantity change after the fault is obtained by calculation, and then the fault location and the probable fault location are initially determined, and the accuracy is obtained by Mahalanobis distance calculation Locate the fault mode and fault location. The IEEE802 bus system is used to test the performance of the power distribution system. The test results show that the detection system has a good ability to recognize and diagnose the power distribution network fault, and has the advantages of simple algorithm and small amount of calculation, Intelligent distribution network status monitoring and accurate fault location requirements.