Hierarchical Optimization MPPT Control Strategy for Independent-input Series-output-type Photovoltaic DC Collection System with Uneven Illumination

TIAN Yanjun; GAO Haonan; WANG Yi; CHEN Yingfei; GUAN Shiqing

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Hierarchical Optimization MPPT Control Strategy for Independent-input Series-output-type Photovoltaic DC Collection System with Uneven Illumination

更新时间：2025-12-08

- Hierarchical Optimization MPPT Control Strategy for Independent-input Series-output-type Photovoltaic DC Collection System with Uneven Illumination
- Vol. 46, Issue 10, Pages: 3552-3562(2020)
- 作者机构：
  
  华北电力大学新能源电力系统国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 October 2020，
  
  Published：2020
- 稿件说明：
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TIAN Yanjun, GAO Haonan, WANG Yi, et al. Hierarchical Optimization MPPT Control Strategy for Independent-input Series-output-type Photovoltaic DC Collection System with Uneven Illumination[J]. 2020, 46(10): 3552-3562.
DOI：

TIAN Yanjun, GAO Haonan, WANG Yi, et al. Hierarchical Optimization MPPT Control Strategy for Independent-input Series-output-type Photovoltaic DC Collection System with Uneven Illumination[J]. 2020, 46(10): 3552-3562. DOI：

摘要

为了解决独立输入串联输出型光伏直流汇集系统在光照不均时的过压问题和最大功率点跟踪（maximum powerpointtracking

MPPT）控制失效问题

提出一种分层优化MPPT控制策略

该策略通过判断和切换DC-DC变流器的运行模式

协调交流网侧模块化多电平变流器（multiple modular converter

MMC）在一定运行范围内灵活地调节直流母线电压

实现光伏侧DC-DC变流器和网侧逆变器的分层控制。最后

在MATLAB/Simulink中通过3个模块级联的光伏直流汇集系统仿真验证了该策略的有效性。研究结果表明:所提控制策略在多种光照不均衡的工况下可实现模块间的功率优化配置

提升整个光伏系统的送出功率。研究结果可为光伏直流汇集系统的稳定运行和功率优化提供一定的理论依据。

Abstract

In order to solve the overvoltage problem and MPPT control failure problem of an independent-input series-output-type photovoltaic DC collection system when the illumination is uneven

we propose a layered optimization MPPT control strategy. By judging and switching the operation mode of the DC-DC converter

the strategy coordinates the MMC converter on the AC side to flexibly adjust the DC bus voltage within a certain operating range to realize the hierarchical control of DC-DC converters and grid-side inverters. Finally

the effectiveness of the strategy is verified by simulation of three modules cascaded in MATLAB/Simulink. The research results show that the proposed control strategy can optimize the power between modules under various operating conditions with uneven illumination

and improve the output power of the entire photovoltaic system. The research results can provide theoretical basis for the stable operation and power optimization of the photovoltaic DC collection system.

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Related Institution

State Key Laboratory of New Energy Power Systems, North China Electric Power University

School of Electric and Dynamic Engineering, Taiyuan University of Technology

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology

Jiaxing Renewable Power Electrical Co., Ltd.

Shanghai Najie Complete Electric Co., Ltd.

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