一种面向智能电网的交流电源失真度校准方法  

Calibration method for AC power supply distortion oriented to the smart grid

作　　者：刘春艳 张守亮 胡元元 刘天畅 蒙丹 Liu Chunyan;Zhang Shouliang;Hu Yuanyuan;Liu Tianchang;Meng Dan(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266000,Shandong,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266000

出　　处：《电测与仪表》2023年第9期138-144,共7页Electrical Measurement & Instrumentation

基　　金：中车青岛四方机车车辆股份有限公司科研项目(JL-2020-438)。

摘　　要：智能电网面向低能耗发展要求电力系统中电源设备失真度在一定范围内。文中针对交流电源输出电流难以校准失真度的问题,结合理论推导分析失真度的影响因素,提出了一种应用分流器的交流电源校准新方法,可以显著降低校准不确定度。实验结果表明:分流器法校准交流失真度适用于更大的电流输出范围,弥补了部分功率分析仪电流量程有限的缺失,降低了失真度校准的不确定度。通过蒙特卡洛方法仿真计算分流器法由于阻值变化引起的失真度改变量,并通过不确定度理论计算,验证了分流器法在交流电源电流失真度校准方面明显的优势。不确定度从0.996%降低至0.2%,该方法可以作为面向智能电网服务的电源失真度优化校准方法,为智能电网降低噪声干扰、高效利用能源提供助力。The low energy consumption development of smart grid requires that the power supply equipment distortion in the power system should be within a certain range.Aiming at the problem that it is difficult to calibrate the distortion degree of the output current of AC power supply,the influencing factors of the distortion are analyzed by theoretical deduction.A novel calibration method for AC power supply using a shunt is proposed,which can significantly reduce the calibration uncertainty.The experimental results show that the AC distortion degree of shunt calibration method is suitable for a larger current output range,which makes up for the limited current range of some power analyzers and reduces the uncertainty of distortion calibration.Monte Carlo method is used to simulate and calculate the distortion caused by the shunt method due to the variation of resistance value,and the uncertainty theory is used to verify the obvious advantages of the shunt method in the calibration of AC power supply current distortion.The uncertainty is reduced from 0.996%to 0.2%.This method can be used as an optimization calibration method of power distortion degree for smart grid service,which can help smart grid reduce noise interference and efficiently use energy.

关 键 词：交流电源 校准 分流器 失真度 

分 类 号：TM933[电气工程—电力电子与电力传动]