A new control strategy for MPPT in photovoltaic system based on fuzzy and variable step size algorithm

LIU Ruiyang; XUE Yuncan; FENG Baoyue; LI Bin

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A new control strategy for MPPT in photovoltaic system based on fuzzy and variable step size algorithm

Thermal Power Generation Issue 4, (2016)

更新时间：2025-09-28

- A new control strategy for MPPT in photovoltaic system based on fuzzy and variable step size algorithm
- 作者机构：
  
  1. 山东电力工程咨询院有限公司,山东,济南,250013
  2. 河海大学物联网工程学院,江苏,常州,213022
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM615
- Published Online：15 May 2016，
  
  Published：2016
- 稿件说明：
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LIU Ruiyang, XUE Yuncan, FENG Baoyue, et al. A new control strategy for MPPT in photovoltaic system based on fuzzy and variable step size algorithm[J]. Thermal Power Generation, 2016, (4).
DOI：

LIU Ruiyang, XUE Yuncan, FENG Baoyue, et al. A new control strategy for MPPT in photovoltaic system based on fuzzy and variable step size algorithm[J]. Thermal Power Generation, 2016, (4). DOI：

摘要

针对光伏发电系统在外界环境突变时最大功率点跟踪(MPPT)调整时间过长的缺陷

提出在分段变步长算法的基础上引入模糊控制的模糊分段变步长算法。该算法以占空比为直接控制量

当光伏发电系统功率变化值较大时采用模糊控制使系统工作点迅速跟踪到最大功率点(MPP)附近；反之则通过功率二次微分值的正、负确定跟踪步长

若二次微分值为正

则采用大步长进行快速跟踪

为负则采用分段步长使系统工作快速稳定地达到MPP处。通过仿真实验对比日照强度发生突变时

分别采用分段变步长算法和模糊变步长算法的MPPT效果。结果表明:当外界环境发生突变时

模糊分段变步长算法不会在MPP周围产生功率振荡

在调整时间和稳定性上明显优于分段变步长算法

实现了光伏发电系统快速性和稳定性的统一。

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