Control Strategy for Improving VSG Frequency Stability in Energy Stroage Power Conversion System

FENG Xiaojing; HUANG Mingyuan; ZHANG Zelei; YANG Peihao; HE Kailin

doi:10.13296/j.1001-1609.hva.2025.11.004

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Control Strategy for Improving VSG Frequency Stability in Energy Stroage Power Conversion System

Grid Forming Control Strategy | 更新时间：2025-11-04

- Control Strategy for Improving VSG Frequency Stability in Energy Stroage Power Conversion System
- High Voltage Apparatus Vol. 61, Issue 11, Pages: 34-44(2025)
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- DOI：10.13296/j.1001-1609.hva.2025.11.004
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- Received：07 May 2025，
  
  Revised：2025-07-27，
  
  Published：16 November 2025
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FENG Xiaojing, HUANG Mingyuan, ZHANG Zelei, et al. Control Strategy for Improving VSG Frequency Stability in Energy Stroage Power Conversion System[J]. High voltage apparatus, 2025, 61(11): 34-44.
DOI：

FENG Xiaojing, HUANG Mingyuan, ZHANG Zelei, et al. Control Strategy for Improving VSG Frequency Stability in Energy Stroage Power Conversion System[J]. High voltage apparatus, 2025, 61(11): 34-44. DOI： 10.13296/j.1001-1609.hva.2025.11.004.

摘要

在储能换流器（power conversion system，PCS）控制系统中采用了虚拟同步机（virtual synchronous generation，VSG）控制策略，使其拥有与同步发电机相近的旋转及励磁特性。提出一种新型自适应虚拟惯量VSG控制方法，引入频率变化率表征虚拟惯量，减少储能VSG频率调节时的调节偏差与调节时间；针对储能系统常见低频扰动，采用虚拟电力系统静态稳定器（power system stabilizer，PSS）调节环节，增加VSG控制系统阻尼比，维持频率稳定。MATLAB/Simulink仿真和RTDS实验结果表明：所提新型自适应虚拟惯量VSG控制可以维持储能系统输出频率稳定性，所提虚拟PSS调节环节可以有效改善储能VSG阻尼特性，提高控制系统对低频振荡的抑制能力，新型控制方法可以提高储能VSG控制系统的频率稳定性。

Abstract

The adoption of virtual synchronous generation（VSG）control strategy in the power conversion system （PCS）control system for energy storage converters makes it to possess similar rotation and excitation characteristics to synchronous generators. A novel adaptive virtual inertia VSG control method is proposed，the frequency change rate is introduced to characterize virtual inertia，thus reducing the adjustment deviation and adjustment time during the adjustment of energy storage VSG frequency. As for the common low-frequency disturbances in energy storage systems，a virtual power system stabilizer（PSS）is used to regulate the loop and increase the damping ratio of the VSG control system as well as maintain frequency stability. The MATLAB/Simulink simulation and RTDS experimental results show that the proposed new adaptive virtual inertia VSG control can maintain the output frequency stability of the energy storage system，the proposed virtual PSS adjustment link can effectively improve the damping characteristics of the energy storage VSG and enhance the the suppression ability of the control system to low-frequency oscillations. The new control method can improve the frequency stability of the energy storage VSG control system.

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references

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