摘要
以三相四线制星形连接供电系统为例,分析了三相负载的不对称性对负载电能计量的影响。提出了三相负载虚拟中性点电压参数辨识的改进用户电能计量方法:在用户侧负载参数未知的情况下,利用同步采样三相电路公共连接点的实测电压、电流波形,采用参数辨识方法辨识负载虚拟中性点的电压,从而做到准确计量三相负载电能。通过Matlab仿真实例,将传统电能计量值和基于辨识方法的电能计量值分别与三相负载实际消耗的电能作比较,验证了该电能计量方法的准确性及合理性。
Taking the three-phase four-wire system as an example,the impact of asymmetric loads on electric energy measurement is studied.In this paper a new method to improve the electric load measurement based on virtual neutral point voltage parameter identification is proposed,that is,under unknown load parameters at the consumer side,the virtual neutral point voltage is identified with the voltage and current waveforms sampled synchronously at the point of common coupling of three-phase load,so as to accurately measure and compute the value of three-phase loads.Through the simulation using Matlab,the electric power measurement values with traditional method and parameter identification method are compared respectively regarding the actual load consumption values,which verifies the accuracy and reasonableness of the proposed method.
出处
《中国电力》
CSCD
北大核心
2013年第8期128-132,共5页
Electric Power
关键词
不对称负载
虚拟中性点电压
参数辨识
电能计量
asymmetric load virtual neutral point voltage parameter identification electric energy measurement
