CAJ | 학술논문

针对光伏阵列在部分阴影遮挡条件下具有多个局域最大功率点的最大功率点跟踪问题，在详细分析光伏阵列I-V特性的基础上，提出一种新颖的全局最大功率点跟踪方法。该方法根据光伏阵列最大功率点附近电压随电流的增加迅速下降的特点，先以大步长扫描方法锁定到各局域峰点附近，然后再采用P&O法以小步长跟踪该峰点，最后通过比较搜索到的各个局域峰点的功率来确定全局最大功率点。仿真和实验结果表明所提方法能够准确而迅速地跟踪到全局最大功率点，有效提高光伏阵列在部分阴影遮挡条件下的并网发电输出效率。
침대광복진렬재부분음영차당조건하구유다개국역최대공솔점적최대공솔점근종문제，재상세분석광복진렬I-V특성적기출상，제출일충신영적전국최대공솔점근종방법。해방법근거광복진렬최대공솔점부근전압수전류적증가신속하강적특점，선이대보장소묘방법쇄정도각국역봉점부근，연후재채용P&O법이소보장근종해봉점，최후통과비교수색도적각개국역봉점적공솔래학정전국최대공솔점。방진화실험결과표명소제방법능구준학이신속지근종도전국최대공솔점，유효제고광복진렬재부분음영차당조건하적병망발전수출효솔。
In order to track the real global maximum power point(GP) of the photovoltaic array which has multi-local maximum power point under partially shaded condition, a novel algorithm for tracking GP was advanced on the base of analyzing the I-V characteristics of photovoltaic array. According to the character-istics that the voltage nearby maximum power point decrease rapidly with the increase of the current, a large step scan method is applied firstly to locate the vicinity of the local maximum point and then the P&O method was applied to track the local maximum point with small step. At last, the GP was obtained by comparing the power of all local maximum point. The simulation and experiment results show that the GP can be tracked accurately and quickly with the proposed algorithm, and the grid-connected power genera-tion efficiency of the photovoltaic array can be improved Effectively under partial shadowing conditions.