基于阻抗适配的独立光伏系统协调控制方法-电网技术.PDF

第39 卷 第4 期 电 网 技 术 Vol. 39 No. 4 2015 年4 月 Power System Technology Apr. 2015 文章编号：1000-3673 （2015 ）04-0911-05 中图分类号：TM 615 文献标志码：A 学科代码：470·4054 基于阻抗适配的独立光伏系统协调控制方法 郑颖楠，张晓军，于民柱 （电力电子节能与传动控制河北省重点实验室(燕山大学 电气工程学院) ，河北省 秦皇岛市 066004 ） An Adaptive Impedance Matching Based Coordinated Control Method for Autonomous Photovoltaic Generation System ZHENG Yingnan, ZHANG Xiaojun, YU Minzhu (Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province (College of Electrical Engineering, Yanshan University), Qinhuangdao 066004, Hebei Province, China) ABSTRACT: Taking autonomous photovoltaic (PV) 0 引言 generation system as research object, based on improved 能源、环境以及人类可持续发展的需求，使得 dynamic equivalent impedance matching method an adaptive impedance matching method is proposed to realize a dual mode 作为新能源的光伏发电受到越来越多的关注。由于 conversion coordinated control method, in which the change of 光伏电池输出功率的不确定性，发电系统各功能单 system structure is not needed, thus the control structure 元间必须协调配合才能正常工作。因此，国内外许 switching caused by operation mode swapping of autonomous 多学者致力于光伏发电协调控制的研究[1-7] 。研究发 PV generation system can be reduced. The feature of the 现，多数光伏发电协调控制系统都是基于负载和光 proposed method lies in that by means of adaptive matching 伏电池两者的功率差来调节的[8-10] 。由于本质上需 between equivalent internal impedance and external impedance 改变对能量流的控制方式，因此在实现上很难避开 of the PV cell the output power of the PV cell can be continuously adjusted according to the demand and the smooth 系统控制结构的变化并需要切换逻辑[11-12]，增加了 transition