Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers

Chao Shen; Wei Gu; Wanxing Sheng; Keyan Liu

doi:10.17775/CSEEJPES.2022.03300

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Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers

Regular Papers | 更新时间：2026-10-15

- Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers
- Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers
- 中国电机工程学会电力与能源系统学报(英文) 2024年10卷第2期页码：593-604
- 作者机构：
  
  1. School of Electrical Engineering, Southeast University,Nanjing,China
  2. Power Distribution Research Department, China Electric Power Research Institute,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2022.03300
  中图分类号：
- 纸质出版：2024-03-01
- 稿件说明：
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Chao Shen, Wei Gu, Wanxing Sheng, 等. Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(2):593-604.

Chao Shen, Wei Gu, Wanxing Sheng, et al. Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers[J]. CSEE Journal of Power and Energy Systems, 2024, 10(2): 593-604.
Chao Shen, Wei Gu, Wanxing Sheng, 等. Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(2):593-604. DOI： 10.17775/CSEEJPES.2022.03300.

Chao Shen, Wei Gu, Wanxing Sheng, et al. Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers[J]. CSEE Journal of Power and Energy Systems, 2024, 10(2): 593-604. DOI： 10.17775/CSEEJPES.2022.03300.

摘要

Abstract

Virtual synchronous control has been widely studied for the advantages of emulating inertia for voltage source converters (VSCs). A constant dc-link voltage is usually assumed in existing literature to estimate transient stability of virtual synchronous generators (VSGs). However

actual power supply in the dc-side of VSGs is limited and different dc-link voltage controllers are needed to achieve power balance between DC side and AC side. Addition of dc-link voltage controller has great influence on transient behavior of VSGs

which has not been investigated by previous research. To fill this gap

this paper gives insights into the effect of dc-link voltage dynamics on transient stability of VSGs. First

two typical kinds of VSGs with dc-link voltage controllers are introduced. Then

mathematical models considering dc-link dynamics are established and the effect of dc-link voltage controllers on transient synchronization stability of VSGs is revealed through equal area criterion (EAC). It is found that dc-link voltage controller would reduce stability margin of VSGs and design-oriented transient stability analysis is carried out quantitively using critical clearing time (CCT). Finally

simulation results are given to validate correctness of theoretical analysis.

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