《电力自动化设备》

引用本文:	胡艺雯,李秉芳,杨松浩,赵天骐,谢欢,郝治国.考虑风机低穿动态的风火打捆外送系统暂态功角稳定性分析[J].电力自动化设备,2025,45(2):193-200.
	HU Yiwen,LI Bingfang,YANG Songhao,ZHAO Tianqi,XIE Huan,HAO Zhiguo.Transient power-angle stability analysis of wind-thermal-combined sending system considering LVRT dynamics of wind turbines[J].Electric Power Automation Equipment,2025,45(2):193-200.

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考虑风机低穿动态的风火打捆外送系统暂态功角稳定性分析
胡艺雯¹, 李秉芳¹, 杨松浩¹, 赵天骐², 谢欢², 郝治国¹
1.西安交通大学电气工程学院，陕西西安 710049;2.国网冀北电力有限公司电力科学研究院(源网荷储灵活运行与协调控制国家电网公司实验室)，北京 100045

摘要:

风火打捆外送系统中，风机的低电压穿越及恢复控制会影响火电机组的转子动态，可能诱发首摆或多摆失稳。建立了风火打捆外送系统的暂态功角稳定性分析模型，揭示了风电场输出功率变化对火电机组暂态功角稳定性的影响机理；基于等面积定则，分析了不同低电压穿越深度、低电压穿越恢复速率以及风机接入位置对功角失稳形态及暂态稳定性的影响；通过单机及多机系统仿真验证了增加风机低电压穿越深度、减缓低电压穿越恢复速度可增强火电机组首摆稳定性，但增大了其多摆失稳的风险。

关键词: 风火打捆外送系统等面积定则暂态功角稳定性低电压穿越多摆稳定性

DOI：10.16081/j.epae.202410019

分类号:TM61;TM712

基金项目:国家自然科学基金资助项目(52007143)；国网冀北电力有限公司科技项目(B3018K240005)

Transient power-angle stability analysis of wind-thermal-combined sending system considering LVRT dynamics of wind turbines

HU Yiwen¹, LI Bingfang¹, YANG Songhao¹, ZHAO Tianqi², XIE Huan², HAO Zhiguo¹

1.School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2.Electric Power Research Institute of State Grid Jibei Electric Power Co.,Ltd.(Flexible Resource-Network-Demand-Storage Co-operation and Control Laboratory),Beijing 100045, China

Abstract:

In the wind-thermal-combined sending system, low voltage ride through(LVRT) and recovery control of wind turbines may affect the rotor dynamics of thermal power unit, and may induce the first-swing or multi-swing instability. The transient power-angle stability analysis model of the wind-thermal-combined sending system is established to reveal the influence mechanism of wind farm output power on transient power-angle stability of thermal power units. Based on the equal area criterion, the effect of different LVRT depths, LVRT recovery rates, and the wind turbines access locations on the instability pattern and transient stability of power angle are analyzed. Single-machine and multi-machine system simulations verify that increasing LVRT depth and slowing down LVRT recovery rate can enhance the first-swing stability of thermal power unit but increase the risk of its multi-swing instability.

Key words: wind-thermal-combined sending system equal area criterion transient power-angle stability LVRT multi-swing stability

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