基于虚拟同步机的并网逆变器不平衡电压灵活补偿策略

NIAN Heng

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基于虚拟同步机的并网逆变器不平衡电压灵活补偿策略

更新时间：2025-08-13

- 基于虚拟同步机的并网逆变器不平衡电压灵活补偿策略
- Automation of Electric Power Systems Vol. 43, Issue 3, Pages: 123-129(2019)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
- 基金信息：
- DOI：
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- Published：2019
- 稿件说明：
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NIAN Heng. [J]. Automation of electric power systems, 2019, 43(3): 123-129.
DOI：

NIAN Heng. [J]. Automation of electric power systems, 2019, 43(3): 123-129. DOI：

摘要

电力电子设备大量地接入电网

给电网带来了系统惯量和阻尼降低等问题。为了提高不平衡电网频率稳定性和改善电网电压的电能质量

提出了基于虚拟同步机的不平衡电压灵活补偿控制策略。通过采用虚拟同步控制

在电网频率波动时提供有功功率支撑

提高电网频率稳定性。通过采用负序电压前馈补偿

抑制公共连接点不平衡电压

改善电能质量。通过建立不平衡电网下的虚拟同步机模型

提出采用电压前馈的不平衡电压抑制策略。进而

分析了采用电压前馈补偿策略的控制性能

研究不平衡电压补偿系数的设定方法。提出的控制方法可根据电网电压不平衡度的控制目标和设备剩余容量自动地调整不平衡电压补偿系数

实现不平衡度灵活调节。最后

通过仿真结果验证所提控制策略的正确性和有效性。

Abstract

With a large number of power electronics devices connected to the power grid

there are problems

such as inertia and damping decreasing. To improve the frequency stability and power quality of the unbalanced grid

this paper proposes a flexible compensation control strategy of unbalanced voltage based on virtual synchronous generator (VSG). When the frequency of the grid is oscillating

VSG can provide active power support to enhance the stability of power system. By using the feed-forward compensation control of negative sequence voltage

it can restrain the unbalanced voltage at the point the of common coupling and improve the power quality. By building the model of VSG under unbalanced grid

this paper proposes a suppression strategy of unbalanced voltage by using the voltage feed-forward compensation. Then

the performance of voltage feed-forward compensation strategy is analyzed and the compensation coefficient setting method of the unbalanced voltage is studied. The method can realize flexible control

which changes the compensation coefficient automatically according to the goal of voltage unbalanced factor and the remaining capacity of instrument. Finally

simulation results validate the correctness and effectiveness of proposed control strategy.

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Related Institution

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