变流器自适应跟网-构网融合控制及其改善振荡稳定性的机理分析

刘朋印; 谢小荣; 缪庆庆; 苏开元; 霍轶东; 王晰

doi:10.13334/j.0258-8013.pcsee.241545

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变流器自适应跟网-构网融合控制及其改善振荡稳定性的机理分析

电力电子 | 更新时间：2026-01-08

- 变流器自适应跟网-构网融合控制及其改善振荡稳定性的机理分析
- Adaptive Grid-forming and Grid-following Hybrid Control and Its Mechanism for Enhancing Converter's Oscillatory Stability
- 中国电机工程学报 2025年45卷第15期页码：6062-6069
- 作者机构：
  
  1. 新型电力系统运行与控制全国重点实验室(清华大学电机系), 北京市海淀区,100084
  2. 国网山东省电力公司,山东省,济南市,250001
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.241545
  中图分类号：
- 纸质出版：2025
- 稿件说明：
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刘朋印, 谢小荣, 缪庆庆, 等. 变流器自适应跟网-构网融合控制及其改善振荡稳定性的机理分析[J]. 中国电机工程学报, 2025,45(15):6062-6069.

LIU Pengyin, XIE Xiaorong, MIAO Qingqing, et al. Adaptive Grid-forming and Grid-following Hybrid Control and Its Mechanism for Enhancing Converter's Oscillatory Stability[J]. 2025, 45(15): 6062-6069.
刘朋印, 谢小荣, 缪庆庆, 等. 变流器自适应跟网-构网融合控制及其改善振荡稳定性的机理分析[J]. 中国电机工程学报, 2025,45(15):6062-6069. DOI： 10.13334/j.0258-8013.pcsee.241545.

LIU Pengyin, XIE Xiaorong, MIAO Qingqing, et al. Adaptive Grid-forming and Grid-following Hybrid Control and Its Mechanism for Enhancing Converter's Oscillatory Stability[J]. 2025, 45(15): 6062-6069. DOI： 10.13334/j.0258-8013.pcsee.241545.

摘要

跟网变流器在弱电网中存在振荡风险，而其强电网振荡稳定性较好；相较而言，构网变流器在弱电网中具有良好的振荡稳定性，但在强电网中易振荡失稳。为结合跟、构网控制的优势，有必要研究跟网-构网融合控制策略，进而改善变流器的强、弱电网振荡稳定性。首先，基于自适应混合同步控制实现融合控制策略，并提出依据短路比(short circuit ratio，SCR)调整变流器跟网、构网控制输出占比的自适应融合方法；之后，基于频率耦合阻抗模型揭示所提控制改善变流器强、弱电网振荡稳定性的机理；最后，利用阻抗分析和电磁暂态仿真对比所提控制、跟网控制和构网控制在不同电网强度下的振荡稳定性。结果表明：融合控制变流器在1 ≤ SCR ≤ 50范围内不存在振荡失稳风险，其强、弱电网振荡特性优于单纯的跟网变流器和构网变流器。

Abstract

The grid-following (GFL) converters can operate stably in stiff grids but are susceptible to oscillation risks in weak grids. Conversely

grid-forming (GFM) converters demonstrate stable operation under weak grids but may become unstable when connected to a very strong grid. To enhance the converters' oscillatory stability under both strong and weak grids

this paper proposes an adaptive hybrid control that combines the advantages of both GFL and GFM control strategies. First

the paper introduces hybrid synchronization control

which can adjust the GFL/GFM characteristics of the converter in response to short-circuit ratio (SCR). Then

the impedance model is derived to reveal how the proposed control enhances the oscillatory stability of the converter under strong and weak grids. Finally

impedance analysis and electromagnetic transient simulation are carried out to analyze the oscillatory characteristics of the proposed control. The results indicate that the proposed control can exhibit superior oscillatory stability over a wide range of SCRs (1 ≤ SCR ≤ 50) and demonstrate improved small-signal behaviors under ultra-weak grids as well as stiff grids compared to GFL and GFM controls.

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