基于无刷直流电机电流的断路器手车梅花触头对中度诊断方法  

Method to Diagnose the Concentricity of Tulip Contacts of a Medium Voltage Circuit Breaker Handcart Based on the Armature Current of a BLDCM

作　　者：王刚 彭彦卿 庄志坚 孙利杰 熊逸伟 WANG Gang;PENG Yanqing;ZHUANG Zhijian;SUN Lijie;XIONG Yiwei(School of Engineering and Automation,Xiamen University of Technology,Fujian Xiamen 361024,China;ABB(China)Co.,Ltd.Power Product Medium Voltage Technology Center,Fujian Xiamen 361101,China;State Grid Loudi Power Supply Company,Hunan Loudi 417000,China)

机构地区：[1]厦门理工学院电气工程与自动化学院,福建厦门361024 [2]ABB(中国)有限公司中压产品技术中心,福建厦门361101 [3]国网娄底供电公司,湖南娄底417000

出　　处：《高压电器》2020年第3期46-53,共8页High Voltage Apparatus

基　　金：福建省自然科学基金资助项目(2019J01867)。

摘　　要：目前,市场上可抽出式高压开关柜无法确认断路器手车梅花触头与静触头的对中度是否良好。文中提出了以无刷直流电机作为底盘车驱动电机,利用电枢电流数据实现手车梅花触头和静触头对中度诊断的方法。首先,为确定电枢电流的影响因素,分析无刷直流电机数学模型并仿真验证;利用具有不同偏心距离的静触头代替试验台原静触头,模拟不同程度的对中偏差;其次,以均值滤波和高斯拟合处理啮入阶段曲线,提取拟合函数参数A、xmax和啮入阶段电流均值为曲线特征,训练BP神经网络模型用于对中度诊断;最后,采集新数据,对所述方法进行试验验证。结果表明,所述方法对手车梅花触头和静触头对中度识别精度高。该方法为断路器手车梅花触头对中度诊断提供了一种思路。At present,there is no method for high voltage withdrawable switchgears to determine whether the concentricity of the tulip contacts of a circuit breaker handcart is good.This paper used a brushless DC motor as the driving motor for the circuit breaker handcart,and a method to diagnosis the concentricity of the tulip contacts of a medium voltage circuit breaker handcart was proposed.First of all,the mathematic model of the brushless DC motor was analyzed to determine the influencing factor of armature current.Static contacts with different eccentric distances were used to replace the original static contacts of the test bed to simulate different degrees of center deviation.Secondly,the current curves were processed by mean filter and Gauss fitting,and the parameter of the fitting function including A,xmax and the mean current of the meshing stage were extracted as the curves characteristics.The characteristics was used to train a BP neural network which was used to diagnosis the concentricity of tulip contacts.Finally,more data was sampled to test the method.It has been proved that the method was able to recognize different degrees of center deviation,and the method is high accuracy.It can provide a new idea to diagnosis the concentricity of tulip contacts of a medium voltage circuit breaker handcart.

关 键 词：断路器手车 无刷直流电机电枢电流 梅花触头与静触头对中度 高斯拟合 BP神经网络 

分 类 号：TM33[电气工程—电机] TM561