Oscillation Center Migration Characteristics and Active Stability Control of Virtual Synchronous Generator Grid-connected System

ZHENG Chao; JIANG Jingya; SUN Huadong

doi:10.13334/j.0258-8013.pcsee.251963

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Oscillation Center Migration Characteristics and Active Stability Control of Virtual Synchronous Generator Grid-connected System

更新时间：2026-09-28

- Oscillation Center Migration Characteristics and Active Stability Control of Virtual Synchronous Generator Grid-connected System
- Vol. 46, Issue 16, Pages: 5792-5804(2026)
- 作者机构：
  
  电网安全全国重点实验室(中国电力科学研究院有限公司)，北京市海淀区,100192
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.251963
  CLC：
- Published：2026
- 稿件说明：
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ZHENG Chao, JIANG Jingya, SUN Huadong. Oscillation Center Migration Characteristics and Active Stability Control of Virtual Synchronous Generator Grid-connected System[J]. 2026, 46(16): 5792-5804.
DOI：

ZHENG Chao, JIANG Jingya, SUN Huadong. Oscillation Center Migration Characteristics and Active Stability Control of Virtual Synchronous Generator Grid-connected System[J]. 2026, 46(16): 5792-5804. DOI： 10.13334/j.0258-8013.pcsee.251963.

摘要

虚拟同步机VSG具备电压源外特性，是新型电力系统安全稳定运行的重要支撑装备。该文建立计及限流和内电势幅值双重约束的VSG并网系统机电暂态仿真模型；针对具有不同短路比的VSG并网系统，解析限流约束引起等效内电势幅值变化进而导致系统振荡中心迁移的特性；针对振荡中心迁移的位置特征，提出基于VSG状态和广域支路响应的主动稳定控制策略。面向含VSG的修改后IEEE10机39节点系统，仿真验证振荡中心迁移特性分析的正确性及主动稳定控制策略维持主网稳定的有效性。

Abstract

Virtual synchronous generator (VSG) possesses the external characteristics of a voltage source and serves as a crucial supporting device for the safe and stable operation of new-type power systems. This paper establishes an electromechanical transient simulation model of the VSG grid- connected system that takes into account the dual constraints of current limiting and internal electromotive force(EMF) amplitude. For VSG grid-connected systems with different short-circuit ratios

the law is analyzed by which the current limiting constraint causes changes in the equivalent internal EMF amplitude

thereby leading to the migration of the system's oscillation center. In response to the positional characteristics of the oscillation center migration

an active stability control strategy based on VSG states and wide-area branch responses is proposed. For the modified IEEE 10- machine 39-bus system incorporating VSGs

simulations verify the correctness of the oscillation center migration characteristic analysis and the effectiveness of the active stability control strategy in maintaining the stability of the main power grid.

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