计及构网型SVG的新能源并网系统暂态稳定性分析

王昭伟; 王秀丽; 张海涛; 魏凤廷

doi:10.7652/xjtuxb202611004

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计及构网型SVG的新能源并网系统暂态稳定性分析

更新时间：2026-11-09

- 计及构网型SVG的新能源并网系统暂态稳定性分析
- Transient Stability Analysis of Renewable Energy Grid-Connected Systems Considering Grid-Forming SVG
- 西安交通大学学报 2026年60卷第11期页码：35-47
- 作者机构：
  
  西安交通大学电气工程学院，710049，西安
- 作者简介：
  
  王昭伟（2002—），男，硕士生；
  张海涛（通信作者），男，副教授，硕士生导师。
- 基金信息：
  
  国家重点研发计划资助项目(2021YFB2401100);国网冀北电力有限公司科技项目(B3018K240064)
- DOI：10.7652/xjtuxb202611004
  中图分类号： TM464
- 收稿：2026-03-19，
  
  网络首发：2026-06-18，
  
  纸质出版：2026-11-10
- 稿件说明：
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王昭伟, 王秀丽, 张海涛, 等. 计及构网型SVG的新能源并网系统暂态稳定性分析[J/OL]. 西安交通大学学报,2026,60 (11):35-47. https://doi.org/10.7652/xjtuxb202611004.

WANG Zhaowei, WANG Xiuli, ZHANG Haitao, et al. Transient Stability Analysis of Renewable Energy Grid-Connected Systems Considering Grid-Forming SVG[J/OL]. Journal of Xi'an Jiaotong University,2026,60 (11):35-47. https://doi.org/10.7652/xjtuxb202611004.
王昭伟, 王秀丽, 张海涛, 等. 计及构网型SVG的新能源并网系统暂态稳定性分析[J/OL]. 西安交通大学学报,2026,60 (11):35-47. https://doi.org/10.7652/xjtuxb202611004. DOI：

WANG Zhaowei, WANG Xiuli, ZHANG Haitao, et al. Transient Stability Analysis of Renewable Energy Grid-Connected Systems Considering Grid-Forming SVG[J/OL]. Journal of Xi'an Jiaotong University,2026,60 (11):35-47. https://doi.org/10.7652/xjtuxb202611004. DOI：

摘要

针对采用跟网型电压源型换流器（GFL-VSC）并网的新能源场站在弱电网下易发生失稳，以及传统静止无功发生器（SVG）难以满足系统暂态支撑需求等问题，建立构网型（GFM）SVG与GFL-VSC并网系统的全阶数学模型，揭示了GFM-SVG对系统暂态稳定性的影响规律。首先，考虑GFL-VSC与GFM-SVG各控制环节动态和线路电磁暂态，构建GFL-VSC与GFM-SVG并联系统的数学模型。其次，研究电压跌落时GFL-VSC单机并网系统的暂态失稳机理。然后，分析GFM-SVG对GFL-VSC并网系统的支撑机理，使用相平面法研究GFM-SVG各控制参数对系统稳定性的影响规律，采用极限切除时间和极限切除角等指标量化暂态支撑能力。最后，通过电磁暂态仿真验证了理论分析的正确性。研究结果表明：GFM-SVG通过构网控制形成局部相角与频率参考，且进一步结合无功支撑显著提高了并网系统的暂态稳定性；合理配置GFM-SVG，能够将暂态期间并网点电压及GFL-VSC电流幅值相对于额定值的偏差控制在10 %以内。该研究可为计及GFM-SVG并网系统的参数整定提供参考。

Abstract

To address the instability of renewable energy stations integrated via grid-following voltage source converters (GFL-VSCs) in weak grids

as well as the inadequacy of traditional static VAR generators (SVGs) in providing system transient support

a full-order mathematical model of the grid-connected system comprising a grid-forming (GFM) SVG and GFL-VSCs is established to reveal the impact of the GFM-SVG on the system's transient stability.First

considering the dynamics of each control loop of the GFL-VSC and GFM-SVG

as well as the electromagnetic transients of the transmission lines

a mathematical model of the parallel system of the GFL-VSC and GFM-SVG is constructed.Second

the transient instability mechanism of a grid-connected single-GFL-VSC system during voltage sags is investigated.Then

the support mechanism of the GFM-SVG for the GFL-VSC grid-connected system is analyzed.The phase plane method is utilized to study the influence of various control parameters of the GFM-SVG on system stability

and metrics such as the critical clearing time (CCT) and critical clearing angle (CCA) are employed to quantify the transient support capability.Finally

the correctness of the theoretical analysis is verified through electromagnetic transient simulations.The results indicate that the GFM-SVG establishes a local phase angle and frequency reference through grid-forming control

which

combined with reactive power support

significantly enhances the transient stability of the grid-connected system.With a properly configured GFM-SVG

the deviations of the point of common coupling (PCC) voltage and the GFL-VSC current amplitude from their rated values during transients can be maintained within 10%.This study provides a valuable reference for the parameter tuning of grid-connected systems incorporating GFM-SVGs.

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