基于三电平变流器的光伏微电网及其控制策略研究
收稿日期: 2013-10-25
修回日期: 2014-01-10
网络出版日期: 2014-02-28
基金资助
广东省粤港招标项目（2011BZ100101）；佛山市院市合作项目（2012HY100651）；广东省高新区产业化引导项目（2112B0900023）
The Control Strategy of PV Microgrid Based on Three-Level Converters
Received date: 2013-10-25
Revised date: 2014-01-10
Online published: 2014-02-28
宋香荣 , 舒杰 , 张先勇 , 周龙华 . 基于三电平变流器的光伏微电网及其控制策略研究[J]. 新能源进展, 2014 , 2(1) : 25 -30 . DOI: 10.3969/j.issn.2095-560X.2014.01.005
The microgrid in islanding possesses characteristics such as renewable energy generation fluctuation, load change and three-phase voltage unbalance. In order to solve power quality and stability problems in microgrid, this paper focus on the three-level converter structure and its control strategy consisted of inner voltage controller and outer active/reactive power controller for photovoltaic microgrid. For multimachine parallel operation, single converter virtual flux rotation synchronization in the whole system is achieved by network public sync pulse and current sharing decoupling control strategy. Simulation and experiment results demonstrate that the proposed control strategy is simple and feasible, and the power quality is improved compared to the conventional converter. It also provides theoretical and experimental guidelines for the development of the four-leg three-level bi-directional converters.
Key words： microgrid; four-leg three-level; multiple machine control
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