容性设备在线监测装置现场校验系统的开发  

Development of On-site Calibration System for Capacitive Equipment On-line Monitoring Device

作　　者：周泽正 李青[1] 詹洪炎 龚金龙 

机构地区：[1]中国计量大学机电工程学院,杭州310018 [2]国家电网浙江省电力公司电力科学研究院,杭州310014

出　　处：《计算机测量与控制》2016年第12期45-48,共4页Computer Measurement &Control

基　　金：国网浙江省电力公司招标项目(ZBGW15-011-007);浙江省仪器科学与技术重中之重学科学生开放实验项目(JL150531)

摘　　要：针对变电站各类高压容性设备在线监测装置的现场校验,提出一种新的容性设备在线监测装置校验方法并研制出相应的校验系统,校验项目涉及:全电流,阻性电流,容性电流,介损因数;该校验系统由信号采集无线发送装置和检定装置组成,信号采集无线发送装置将现场变压器二次侧电压作为参考电压通过无线传输方式传入检定装置,检定装置内的控制模块根据预设指令及参考电压信号控制内部数控交流电流源生成一路与电网电压频率同步,幅值和相位可调的电流信号;将该电流信号耦合到容性设备在线监测装置电流传感器,通过比较耦合前后装置相应监测量变化值与校验系统设定值的误差,达到校验容性设备在线监测装置有效性的目的;实验证明,该校验系统输出电流指标满足现场校验的要求。The topic research, wireless calibration system for capacitive equipment online monitoring device, can be used for evaluating high voltage capacitive equipment online monitoring device on site. The system＇ s function involve： total current, resistive component of cur- rent, capacitive component of current and factor of dielectric loss. The signal acquisition device provides the power grid voltage as the refer- ence voltage into the detecting device through wireless transmission. According to this reference voltage, the programmable alternating cur- rent source can produce a current signal, whose frequency is same as the power grid voltage and phase shift as well as altitude are adjustable in the control of the preset instruction in controlling module. Coupling this current signal into the current sensor of the online monitoring de- vice, there will be a variation of corresponding monitor value before and after coupling. The error between the above variation and the setting deviation can reflect the effectiveness of the capacitive equipment online monitoring device. It has been verified that this system can meet the requirement of the calibration in practical application.

关 键 词：容性设备在线监测装置 现场校验 数控交流电流源 FM调制 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]