摘要
由于非线性负载造成大量谐波电流注入电网,使电力系统中的电压、电流波形发生严重畸变,电能质量下降,各种电器设备不同程度受损,严重影响电能表的测量精度,使电能计量产生较大误差,介绍了感应式电能表与电子式电能表的计量原理,并对各自的计量误差进行分析,探讨基波电能计量和全电能计量各自的优缺点,并对其合理性进行了比较,以一个简单的非正弦系统为例,提出合理计量电能的方法。
With the fast development of power electronics technologies,more and more non-linear equipments are used.Due to the existence of these non-linear loads,agreat deal of harmonic current discharge in the electric network.The waveforms of voltage and current are distorted seriously,power quality dropped;kinds of electric apparatus are damaged in different extent.Particularly in the field of electric energy metering,it has an severe influence on the accuracy of the electric energy meter,which makes a big error.In this paper,the principle and its difference of metering between induction meter and electric energy meter are analyzed;the merits and shortcomings of basic energy metering and whole energy metering are discussed and also compared properly.At last,in an example of a simple non-linear system,a logical method of energy metering is put forward.
出处
《河北电力技术》
2015年第4期28-31,共4页
Hebei Electric Power
关键词
非线性系统
电能计量误差
谐波功率
系统阻抗
non-linear system
power energy metering error
harmonic power
system impedance
