摘要
介绍暂态电能质量的成因,分析电子式电能表的工作原理,建立仿真模型。通过对可以产生暂态电能质量的典型装置逆变焊机建模,并将其与配电网连接。利用所建立的电子式电能表来计量其电能,与理论值相对比,经过仿真实验验证了暂态电能质量会对电能计量装置产生影响,使之无法准确计量电能。当逆变焊机占空比增加时,逆变焊机工作的功率升高,计量误差也随之增大。
In this paper,the causes of transient power quality problem are introduced,the working principle of electronic watthour meter is introduced,and the simulation model of electronic watt-hour meter is established.The simulation model is used to evaluate the measurement error considering a typical inverter welding machine load which is a significant source of transient power quality problem.The simulation result verifies that the transient power quality can affect the electric energy metering device.For the typical load applied,the electronic watt-hour meter can’t accurate measurement electric energy.It can be concluded that the measurement error will increase with the increasing duty cycle of the inverter.
作者
李玉超
高经国
张秀华
张晓东
赵琛
LI Yuchao;GAO Jingguo;ZHANG Xiuhua;ZHANG Xiaodong;ZHAO Chen(State Grid Weifang Power Supply Company,Weifang 261021,China;State Grid Shandong Electric Power Company,Jinan 250001,China;Shandong Luneng Taishan Football School,Weifang 261200,China)
出处
《山东电力技术》
2019年第2期1-5,9,共6页
Shandong Electric Power
关键词
暂态电能质量
电子式电能表
占空比
逆变焊机
transient power quality
electronic watt-hour meter
duty cycle
inverter welding machine
