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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (5): 137-145.DOI: 10.19912/j.0254-0096.tynxb.2020-0962

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适用于集中型光伏直流升压变换器的MPPT策略

马健1,2, 樊艳芳1, 王一波3, 张鑫宇1,2   

  1. 1.新疆大学电气工程学院,乌鲁木齐 830046;
    2.新疆电力系统全过程仿真重点实验室,乌鲁木齐 830011;
    3.中国科学院电工研究所,北京 100190
  • 收稿日期:2020-09-10 出版日期:2022-05-28 发布日期:2022-11-28
  • 通讯作者: 樊艳芳(1971—),女,硕士、教授、博士生导师,主要从事可再生能源并网技术及电力系统稳定性方面的研究。410849062@qq.com
  • 基金资助:
    国家重点研发计划(2016YFB0900200)

MAXIMUM POWER POINT TRACKING STRATEGY FOR CENTRALIZED PHOTOVOLTAIC DC-DC CONVERTER

Ma Jian1,2, Fan Yanfang1, Wang Yibo3, Zhang Xinyu1,2   

  1. 1. School of Electrical Engineering, Xinjiang University, Urumqi 830046, China;
    2. Xinjiang Key Laboratory of Whole Process Simulation for Power System, Urumqi 830011, China;
    3. Institute of Electronic Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-09-10 Online:2022-05-28 Published:2022-11-28

摘要: 针对基于输入并联输出串联(IPOS)型Boost全桥隔离变换器(BFBIC)的集中型光伏直流并网系统,采用小信号分析法对系统进行静态稳定性分析,进一步对适用于变换器的光伏最大功率点追踪(MPPT)策略展开研究。为满足工程实用性,提出一种能与DC-DC变换器双环控制相耦合的MPPT新算法,该算法基于恒定电压法和扰动观察法,通过变步长采样三点进行比较的方式精确逼近最大功率点。通过PSIM建模仿真,验证了新算法的有效性以及较好的追踪效果。

关键词: 光伏发电, 最大功率点追踪, DC-DC变换器, 闭环控制系统, 有源钳位BFBIC

Abstract: The photovoltaic maximum power point tracking (MPPT) strategy for the system, which is configured with boost full-bridge isolated DC-DC converters (BFBIC) in input-parallel output-series (IPOS) structure, is studied via analyzing the converter operating characteristics with small signal analysis method. In order to meet the practicality in engineering, a new MPPT algorithm which can be coupled with DC-DC converter dual-loop control and based on the constant voltage method and the perturbation observation method is proposed. It accurately approximates the maximum power point by sampling three points with variable step size for comparison. By building a model in PSIM for simulation, the results show that the effectiveness and better tracking effect of the new MPPT strategy are verified.

Key words: solar power generation, maximum power point trackers, DC-DC converters, closed loop control systems, active clamp BFBIC

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