Transient Stability Evaluation and Influencing Factor Analysis of Multi-infeed System with Grid-following Power Source

ZHANG Tian; YAO Jun; YANG Dong; JIN Rongyu; ZHAO Linsheng; XIE Hai

doi:10.7500/AEPS20241202007

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Transient Stability Evaluation and Influencing Factor Analysis of Multi-infeed System with Grid-following Power Source

Basic Research | 更新时间：2025-07-14

- Transient Stability Evaluation and Influencing Factor Analysis of Multi-infeed System with Grid-following Power Source
- Automation of Electric Power Systems Vol. 49, Issue 14, Pages: 31-42(2025)
- 作者机构：
  
  输变电装备技术全国重点实验室（重庆大学），重庆市 400044
- 作者简介：
- 基金信息：
  
  Smart Grid-National Major Science and Technology Project of China(2024ZD0801400);State Grid Corporation of China(52272224000V)
- DOI：10.7500/AEPS20241202007
  CLC：
- Received：02 December 2024，
  
  Revised：2025-02-11，
  
  Published Online：15 May 2025，
  
  Published：25 July 2025
- 稿件说明：
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张添,姚骏,杨东等.含跟网型电源的多馈入系统暂态稳定性评估及影响因素分析[J].电力系统自动化,2025,49(14):31-42.

ZHANG Tian,YAO Jun,YANG Dong,et al.Transient Stability Evaluation and Influencing Factor Analysis of Multi-infeed System with Grid-following Power Source[J].Automation of Electric Power Systems,2025,49(14):31-42.
张添,姚骏,杨东等.含跟网型电源的多馈入系统暂态稳定性评估及影响因素分析[J].电力系统自动化,2025,49(14):31-42. DOI： 10.7500/AEPS20241202007.

ZHANG Tian,YAO Jun,YANG Dong,et al.Transient Stability Evaluation and Influencing Factor Analysis of Multi-infeed System with Grid-following Power Source[J].Automation of Electric Power Systems,2025,49(14):31-42. DOI： 10.7500/AEPS20241202007.

摘要

随着以锁相环同步方式并网的新能源发电规模不断扩大，新型电力系统的暂态特性发生了深刻变化。为了解决多个跟网型电源馈入任意交流系统的暂态稳定问题，首先，基于系统的网架结构推导了跟网型多馈入系统的大扰动数学模型。然后，结合跟网型电源的暂态响应特性及电源间的控制相互作用，明确了跟网型多馈入系统的暂态同步稳定机理。同时，提出了一种跟网型多馈入系统暂态同步稳定平衡点的快速求解方法，并给出了相应的稳定裕度评估指标。在此基础上，综合分析了系统暂态稳定性的主要影响因素及规律。最后，基于改进的IEEE 39节点系统进行算例验证。结果表明，所提评估指标能够准确反映跟网型多馈入系统的暂态同步稳定性，并验证了系统暂态同步稳定性影响规律分析的正确性。

Abstract

With the continuous increase in the scale of renewable energy generation connected to the power grid via synchronization mode with phase-locked loops

the transient characteristics of new power systems have been profoundly changed. In order to solve the transient stability problems of multiple grid-following (GFL) power sources feeded in any AC power grids

firstly

the large-disturbance mathematical model for multi-infeed GFL system is derived based on the grid structure of systems; secondly

the transient synchronization stability mechanism of the multi-infeed GFL system is defined in combination with the transient response characteristics of GFL power sources and control interaction between power sources. Then

a fast solution method for the stability equilibrium point of multi-infeed GFL system is proposed

and the corresponding stability margin evaluation index is given. On this basis

the main factors and rules influencing the transient synchronization stability of systems are analyzed comprehensively. Finally

case verification is conducted based on the modified IEEE 39-bus system. The simulation results show that the proposed evaluation index can accurately reflect the transient synchronization stability of the multi-infeed GFL system

and the correctness of the influencing rule analyis of the transient synchronization stability is verified.

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references

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