基于多点电压电流信息融合的泵房设备故障诊断方法

A Method for Fault Diagnosis of Equipment in Pumping House Based on Multipoint Voltage and Current Information Fusion

为了实现自来水厂泵房及其二次加压泵房中配电设备与水泵故障的快速在线诊断与报警,保障泵房设备的安全运行,提出一种基于多点电压与电流信息融合技术的泵房设备故障在线诊断方法.基于泵房设备配电系统与设备构成,从理论上系统地分析了泵房配电设备与水泵常见故障所具有的电压与电流特征及其相互影响机理,使用配电线路中多个关键节点的实时电压、电流测量值进行融合处理,提取泵房配电主回路供电电压超限、配电线路中空气开关或接触器触头开路、水泵电机绕组开路、水泵电机绕组不平衡与匝间短路、水泵堵转、电机与水泵连接机构断开6类故障的故障特征,实现这些故障的在线诊断.阐述了故障诊断方法的执行条件、实现原理及具体实现步骤.使用MATLAB/Simulink搭建仿真模型进行实验验证,仿真结果表明,本文方法能有效地诊断泵房设备故障,克服了现有人工排查耗时耗力与离线分析不及时的不足,为自来水厂及其二次加压泵房配电设备与水泵的安全运行提供有效保障.

To realize the rapid online diagnosis and alarm of the faults of power distribution equipment and water pumps in the pumping house of the water plant and its secondary booster pumping house so as to guarantee the safe operation of the pumping house system,an online diagnosis method of equipment in the pumping house is proposed based on the multipoint voltage and current information fusion.Based on the distribution equipment and pumps in the pumping house,the voltage and current characteristics of common faults in the power distribution equipment and water pumps in the pumping house,as well as the mutual influence mechanism of these faults,are systematically analyzed for the first time.The real-time voltage and current values of multiple key nodes in the distribution line are fused to extract the fault characteristics of six types of faults,including voltage overruns in the main circuit of the pumping house distribution,open air switches or contactors in the distribution line,open pump motor windings,imbalanced pump motor winding,inter-turn short circuit,pump blocking,connection break between the motor and pump,so as to realize the online diagnoses of these six types of faults.The implementation conditions of the method,the principle of implementation,and the specific steps are elaborated.Finally,MATLAB/Simulink is used to build a simulation model,which is experimentally verified.The simulation results show that the method can effectively diagnose the pumping house equipment faults,overcome the shortcomings of time-consuming and untimely offline analysis in the labor-intensive manual diagnosis,and provide effective protection for the safe operation of the distribution equipment and pumps in the water plant and its secondary booster pumping house.