Research on differential control strategies for output power in distributed photovoltaic power generation systems

MA Min; GU Zeyu; YAO Zhigang; YAN Zhengjia; MA Xiaoyun

doi:10.3969/j.issn.1672-3643.2024.03.004

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Research on differential control strategies for output power in distributed photovoltaic power generation systems

更新时间：2026-07-27

- Research on differential control strategies for output power in distributed photovoltaic power generation systems
- Ningxia Electric Power Issue 3, (2024)
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- DOI：10.3969/j.issn.1672-3643.2024.03.004
  CLC：
- Online First：08 July 2024，
  
  Published：2024
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MA Min, GU Zeyu, YAO Zhigang, et al. Research on differential control strategies for output power in distributed photovoltaic power generation systems[J]. Ningxia Electric Power, 2024, (3).
DOI：

MA Min, GU Zeyu, YAO Zhigang, et al. Research on differential control strategies for output power in distributed photovoltaic power generation systems[J]. Ningxia Electric Power, 2024, (3). DOI： 10.3969/j.issn.1672-3643.2024.03.004.

摘要

光伏发电系统（photovoltaic power generation system

PV）内环控制器控制策略有最大功率跟踪控制策略（maximum power point tracking

MPPT）与直流母线电压支撑策略。两种控制策略切换时易导致直流母线电压过压，系统振荡，严重时将导致PV停机。根据光伏阵列的输出特性，提出一种输出功率微分控制策略。采用该控制策略，PV控制系统可自然切换控制目标，避免MPPT控制策略与直流母线电压控制策略间进行切换，进而可减少直流母线电压振荡，提高系统性能。外环控制器则采用下垂控制实现各个分布式PV输出功率均匀分配。

Abstract

The inner loop control strategies for photovoltaic(PV)power generation systems include maximum power point tracking(MPPT)and DC bus voltage support strategy.Switching between these two control strategies often leads to DC bus overvoltage

causing system oscillations and

in severe cases

PV shutdown.This paper proposes a novel differential control strategy for output power based on the output characteristics of the photovoltaic array.By this strategy

PV can switch the control object naturally without switching the control strategy.Thus

the DC bus voltage oscillation can be reduced and the system performance can be improved.Additionally

an outer loop controller adopts droop control to ensure an even output power distribution across multiple distributed PV systems.The feasibility of this control strategy is substantiated through a simulation model.

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