Stability analysis for multiple energy storage converters considering line and grid-side impedance

LIU Shuo; KAI Shanjin; XIONG Junjie; ZHOU Xu; LIANG Zhen

doi:10.19666/j.rlfd.202104058

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Stability analysis for multiple energy storage converters considering line and grid-side impedance

Thermal Power Generation Vol. 50, Issue 8, Pages: 172-180(2021)

更新时间：2025-09-28

- Stability analysis for multiple energy storage converters considering line and grid-side impedance
- 作者机构：
  
  1. 北方工业大学电气与控制工程学院
  2. 国网江西省电力有限公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202104058
  CLC： TM46
- Published：2021
- 稿件说明：
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LIU Shuo, KAI Shanjin, XIONG Junjie, et al. Stability analysis for multiple energy storage converters considering line and grid-side impedance[J]. Thermal Power Generation, 2021, 50(8): 172-180.
DOI：

LIU Shuo, KAI Shanjin, XIONG Junjie, et al. Stability analysis for multiple energy storage converters considering line and grid-side impedance[J]. Thermal Power Generation, 2021, 50(8): 172-180. DOI： 10.19666/j.rlfd.202104058.

摘要

为保证储能电站能够安全稳定运行

本文研究网侧阻抗、多机并联线路阻抗和并联机组数对储能电站安全稳定运行的影响

通过建立系统数学模型并通过特征值根轨迹方法验证系统稳定性。首先建立三相并网模型

然后运用诺顿等效原理

建立单台及多台储能变流器(PCS)并网等效电路

分析得出决定考虑线路及网侧阻抗情况下的多机并联模型传递函数

据此分析得出并联台数、线路阻抗、网侧阻抗等参数变化对系统稳定性的影响

并通过在Simulink平台下搭建多PCS并联仿真模型

验证了理论的正确性。

Abstract

In order to ensure the safe and stable operation of energy storage power station

this paper studies the influence of grid-side impedance

multi-machine parallel line impedance and the number of parallel units on the safe and stable operation of the energy storage power station. Moreover

by establishing a mathematical model of the system

the stability of the system is verified through the eigenvalue root trace method. Firstly

a three-phase grid-connected model is established. Then

by using Norton's equivalent principle

the grid-connected equivalent circuit of single and multiple energy storage converters(PCS) is established

and the multi-machine parallel model transfer function considering line and network impedance is obtained. On this basis

the influence of parallel station number

line impedance and network impedance on the system stability is analyzed

and the correctness of this theory is verified by building a multi-PCS parallel simulation model in Simulink platform.

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