Voltage Regulation Control Strategy for DC Microgrid with Photovoltaic Participation

WANG Zhi; YU Zicong; ZHANG Quan; ZHU Yongqiang; XIA Ruihua

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Voltage Regulation Control Strategy for DC Microgrid with Photovoltaic Participation

更新时间：2025-12-08

- Voltage Regulation Control Strategy for DC Microgrid with Photovoltaic Participation
- Vol. 46, Issue 11, Pages: 3762-3770(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：30 November 2020，
  
  Published：2020
- 稿件说明：
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WANG Zhi, YU Zicong, ZHANG Quan, et al. Voltage Regulation Control Strategy for DC Microgrid with Photovoltaic Participation[J]. 2020, 46(11): 3762-3770.
DOI：

WANG Zhi, YU Zicong, ZHANG Quan, et al. Voltage Regulation Control Strategy for DC Microgrid with Photovoltaic Participation[J]. 2020, 46(11): 3762-3770. DOI：

摘要

直流微电网中的光伏（photovoltaic

PV）并网变流器多采用最大功率跟踪控制

无法实现功率的灵活控制、无法参与直流微网的电压调节。为了使传统光伏变流器在不增加储能、不改变硬件电路的情况下

具有一定的调压能力

提出了一种无需储能的光伏参与直流微网调压控制策略。首先

介绍了一种利用主光伏阵列始终工作于最大功率跟踪模式来获取最大功率点的光伏系统减载控制策略;然后

针对直流微网惯性较小以及不同光照条件下光伏系统调压能力不同的特点

设计了光伏并网逆变器的虚拟惯量控制和自适应下垂控制

以提高直流微网电压的抗干扰能力

并实现负荷在光伏阵列间的合理分配;最后

在PSCAD/EMTDC中搭建了仿真模型

以验证所提策略的有效性。仿真结果表明

利用所提控制策略

光伏并网变流器能够根据光照条件参与直流微网的电压调节。

Abstract

Most grid-connected converters for the photovoltaic（PV） in the DC microgrid operate under the control of maximum power point tracking mode

thus neither flexible power control nor participation in the voltage regulation can be realized for the microgrid. To solve this problem

a control strategy for DC voltage regulation with PV is proposed to ensure the PV to have the capability of regulating voltage in the absence of extra energy storage and hardware circuit change. Firstly

a de-loading control for PV system using master PV arrays to track maximum power point is introduced. Secondly

based on the characteristics that the inertia of DC microgrid is low and voltage regulation ability of photovoltaic systems under different illumination conditions is different

a virtual-inertia control and an adaptive droop control are proposed to improve the anti-interference ability in DC voltage and achieve rational power allocation among PV arrays. Finally

a simulation model is established on PSCAD/EMTDC to verify the effectiveness of the proposed strategy. The simulation results show that

under the proposed control strategy

the grid-connected converters for the PV can participate in the DC voltage regulation according to illumination condition.

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