基于空间域dP/dV计算的光伏控制方法  

Spatial-domain dP/dV calculation based photovoltaic control method

作　　者：倪佳华 项基[1] 赵波 NI Jia-hua;XIANG Ji;ZHAO Bo(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]国网浙江省电力有限公司电力科学研究院,浙江杭州310014

出　　处：《浙江大学学报（工学版）》2023年第7期1450-1459,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(62173295)。

摘　　要：为了消除基于扰动观测方法下的光伏系统输出稳态振荡,针对当前步长计算中dP/dV存在的零分母问题,以空间上相邻的数据计算dP/dV,去掉扰动观测,直接以dP/dV作为控制变量.在稳态下,避免了零分母问题,实现了稳态时无振荡;在动态下,高频的信号更新反馈保证了快速的动态跟踪过程.统一了最大功率跟踪模式(dP/dV=0)和功率热备模式(dP/dV<0),可以在不同的dP/dV参考值下实现优秀的输出性能.在Matlab/Simulink仿真和实物实验中,通过与传统P&O算法及最新MPPT算法的对比,证明了所提算法在最大功率跟踪性能上的优势;与基于时域dP/dV计算的控制方法对比,证明了所提算法在功率热备输出性能上的优势.A novel approach was proposed to address the zero-denominator issue encountered in the current step calculation of dP/dV in order to eliminate steady-state oscillations in the output of photovoltaic(PV)system based on the perturbation and observation(PO)method.dP/dV was calculated based on data from adjacent points in space,eliminating perturbation observation.The dP/dV value was directly used as the control variable.The zerodenominator issue was circumvented in the steady state,ensuring zero oscillation.The high-frequency signal updating feedback guaranteed a swift dynamic tracking process during dynamic states.The maximum power point tracking mode(dP/dV = 0)and the power standby mode(dP/dV 0)were unified,achieving excellent output performance under various dP/dV reference values.Both Matlab/Simulink simulations and physical experiments were conducted.The superiority of the proposed algorithm in terms of maximum power tracking performance was demonstrated by comparing with traditional PO algorithms and the latest MPPT algorithms.Further comparison with control methods based on time-domain dP/dV calculation showed the advantage of the proposed algorithm in power standby output performance.

关 键 词：光伏(PV) 最大功率跟踪(MPPT) 功率热备 稳态振荡 

分 类 号：TM91[电气工程—电力电子与电力传动]