高压输电线电厂设备的绝缘状态监测仿真  

Simulation of Insulation State Monitoring of Power Plant Equipment of High-voltage Transmission Line

作　　者：张超[1] 崔小军 柳宁 张伟刚[2] ZHANG Chao;CUI Xiao-jun;LIU Ning;ZHANG Wei-gang(Shaanxi Deyuan Fugu Energy Co.,Ltd.,Fugu Shanxi 719407,China;Shaanxi University of Science&Technology,Xi'an Shaanxi 710016,China)

机构地区：[1]陕西德源府谷能源有限公司,陕西府谷719407 [2]陕西科技大学,陕西西安710016

出　　处：《计算机仿真》2025年第2期118-122,共5页Computer Simulation

基　　金：陕西省科技计划项目(2012k03-16)。

摘　　要：高压输电线路和电厂设备本身会产生强大的电磁场,使得绝缘状态监测设备产生的信号相互干扰、混叠,从而导致零序电压、电流信号失真,无法判断绝缘实时状态。为此,提出三维数字化监测方法。利用自动化信息采集装置采集绝缘状态数据,利用Revit应用程序,将数据转换为绝缘状态信号,降低信号失真的现象。考虑绝缘失效情况,获取高压输电线电厂设备发生单相接地故障后产生的零序电压、电流,获取故障线路的绝缘参数,抑制电磁场干扰。设定绝缘介质内部电压和电流瞬时值,利用最小二乘法计算其总体误差平方和,引入自相关函数,得到绝缘状态的监测结果。经实验证明,所提方法能够监测到设备的电流波动情况,且持续时间为250s~320s,与设定时间一致,可准确感知设备发生的闪络现象,由此说明所提方法监测效果稳定,不受各类变化参数的影响,鲁棒性好。High-voltage transmission lines and power plant equipment themselves generate strong electromagnetic fields,causing interference and aliasing of signals generated by insulation state monitoring equipment,resulting in distortion of zero-sequence voltage and current signals and inability to determine real-time insulation status.Therefore,a three-dimensional digital monitoring method is proposed.Using automatic information acquisition device to collect insulation state data,and using Revit application program to convert the data into insulation state signals,so as to reduce the phenomenon of signal distortion.Considering the insulation failure,the zero-sequence voltage and current generated by the single-phase grounding fault of high-voltage transmission line power plant equipment are obtained,and the insulation parameters of the fault line are obtained to suppress electromagnetic field interference.The instantaneous values of voltage and current in the insulation medium are set,and the sum of squares of the overall errors is calculated by the least square method,and the autocorrelation function is introduced to obtain the monitoring results of insulation state.The experiments show that the proposed method can monitor the current fluctuation of the equipment,and the duration is 250s~320s,which is consistent with the set time,and can accurately sense the flashover phenomenon of the equipment,which shows that the monitoring effect of the proposed method is stable,unaffected by various changing parameters and has good robustness.

关 键 词：电厂设备 绝缘状态 绝缘监测 三维数字化 信息采集 

分 类 号：TB42[一般工业技术] TP391[自动化与计算机技术—计算机应用技术]