基于FFT的双向电能计量算法研究  

Research on Bidirectional Electric Energy Metering Algorithm Based on FFT

作　　者：闫鑫[1] YAN Xin(College of Automation and Electrical Engineering, Qingdao University, Qingdao 266071, China)

机构地区：[1]青岛大学自动化与电气工程学院,山东青岛266071

出　　处：《通信电源技术》2017年第4期18-19,33,共3页Telecom Power Technology

摘　　要：随着智能电网的发展,分布式发电逐渐出现并且接入电网,各次谐波的影响越来越大,传统的计量算法已经不能满足现阶段对电能计量的要求,很难完成单向用户的高效和低成本的测量计算。文中提出了一种基于FFT复数运算的双向电能计量算法,通过FFT算法的基本原理,进行推导得出电能计算公式以及还原公式,并且说明了如何计算直流分量。最后通过Matlab进行还原公式的仿真验证,满足了预期要求。同时该计量算法效率高,能大大缩短电能计算的时间。With the development of smart grid,distributed power generation is gradually emerging and connected to the power grid,each harmonic influence is more and more serious.The traditional metering algorithms can not meet the requirements of the current energy metering,and it is difficult to complete one-way user＇s efficient and low-cost measurement and calculation.In this paper,a bidirectional energy metering algorithm based on FFT complex operation is proposed.The basic principle of FFT algorithm is deduced,and the energy calculation formula and the reduction formula are derived.And how to calculate DC component is explained in this paper.Finally,the simulation of the reduction formula is performed by Matlab to meet the expected requirements.At the same time,the algorithm is efficient and can greatly shorten the calculation time of power.

关 键 词：谐波 计量算法 双向电能 FFT 还原公式 

分 类 号：TM933.4[电气工程—电力电子与电力传动]