适用于集中型光伏直流升压变换器的MPPT策略

马健; 樊艳芳; 王一波; 张鑫宇

doi:10.19912/j.0254-0096.tynxb.2020-0962

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

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

作者信息 +

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

Ma Jian^1,2, Fan Yanfang¹, Wang Yibo³, Zhang Xinyu^1,2

Author information +

文章历史 +

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。

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.

导出引用

马健, 樊艳芳, 王一波, 张鑫宇. 适用于集中型光伏直流升压变换器的MPPT策略[J]. 太阳能学报. 2022, 43(5): 137-145 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0962

Ma Jian, Fan Yanfang, Wang Yibo, Zhang Xinyu. MAXIMUM POWER POINT TRACKING STRATEGY FOR CENTRALIZED PHOTOVOLTAIC DC-DC CONVERTER[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 137-145 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0962

中图分类号： TM615

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