摘要
在分析常规交流电能计量的基础上,针对光伏直流发电系统中直流母线存在谐波干扰以及直流侧电流电压波形的非周期性特点,对光伏直流电能计量提出了改进方案,将递推求和算法和梯形求积法引入光伏直流电能计量;利用递推求和算法对采样电压信号和采样电流信号进行滤波处理,进而得到功率,并利用梯形积分法对功率积分来实现电能计量。与传统的电能计量法相比本文采用的算法的结构简单、计量精度更高,适合光伏直流电能的准确计量。
Based on the analysis of conventional AC power measurement,and considering the DC electrical energy measurement characteristics of photovoltaic system that contain harmonic interference and non-periodic wave of current and voltage in DC side,the recursion-sum algorithm and trapezoidal integration method are introduced into the photovoltaic DC electric energy metering.The recursion-sum algorithm is used to filter the sampled voltage and current signals,so that the power is obtained.The electrical energy is then calculated by integrating the power using the trapezoidal integration algorithm.The presented method,suitable for photovoltaic DC electrical energy metering,is very simple to implement and has high measurement accuracy.
出处
《电测与仪表》
北大核心
2012年第S1期75-79,共5页
Electrical Measurement & Instrumentation
关键词
直流计量
光伏发电
递推求和算法
梯形积分
DC measurement,photovoltaic,trapezoidal integration,recursion-sum algorithm
