基于改进电导增量法的变步长MPPT算法  

Variable Step Size MPPT Algorithm Based on Improved Conductance Increment Method

作　　者：郭金智 潘子峻 袁绍军[1] 孙荣富 丁然 徐海翔 王靖然 王隆扬 GUO Jinzhi;PAN Zijun;YUAN Shaojun;SUN Rongfu;DING Ran;XU Haixiang;WANG Jingran;WANG Longyang(State Grid Jibei Electric Power Company Chengde Power Supply Company,Chengde 067000,Hebei,China;School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China;State Grid Jibei Electric Power Company,Beijing 100053,China)

机构地区：[1]国网冀北电力有限公司承德供电公司,河北承德067000 [2]武汉理工大学机电工程学院,湖北武汉430070 [3]国网冀北电力有限公司,北京100053

出　　处：《电气传动》2022年第20期50-56,共7页Electric Drive

摘　　要：光伏发电系统的最大功率点跟踪(MPPT)技术对于保证光伏发电系统的输出效率和系统的稳定性有重要意义。首先提出一种基于改进电导增量法的MPPT控制算法,通过引入与电流相关的系数对步长变化量进行修正,以减小电流变化对光伏电池输出特性的影响。然后基于逼近理想解排序(TOPSIS)决策法,构建了6项评价指标,对3种不同的系数选取方案进行综合评估比较,从而确定最优的变步长系数。MPPT模型的仿真与TOPSIS评估计算表明,用1/I^(2)作为修正系数对dP/dU值进行修正,代替固定步长参数,得到的MPPT控制算法有着更好的综合跟踪性能。The maximum power point tracking(MPPT)technology of the photovoltaic power generation system is the great significance to ensure the output efficiency of the photovoltaic power generation system and the stability of the system.An MPPT control algorithm was proposed based on an improved conductance increment method,which modified the step change by a coefficient related to the current to decrease the influence of the current change on the output characteristics of the photovoltaic cell.Then,based on the technique for order preference by similarity to an ideal solution(TOPSIS)method,six evaluation indicators were constructed to evaluate three different coefficient schemes,and then determined the optimal variable step size coefficient.The simulation of the MPPT model and the TOPSIS calculation show that by using 1/I^(2)as the correction coefficient to correct the dP/dU instead of the fixed step size parameter,the obtained MPPT control algorithm has integrated tracking performance.

关 键 词：光伏发电 最大功率点跟踪 电导增量法 变步长 逼近理想解排序决策法 

分 类 号：TM615[电气工程—电力系统及自动化]