| 引用本文: | 严才,姚伟,崔岩,孙焜,文劲宇,郭任.计及虚拟惯量与下垂控制的风火耦合系统小扰动稳定分析[J].电力自动化设备,2022,42(8): |
| YAN Cai,YAO Wei,CUI Yan,SUN Kun,WEN Jinyu,GUO Ren.Small disturbance stability analysis of wind-thermal coupling system considering virtual inertia and droop control[J].Electric Power Automation Equipment,2022,42(8): |
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| 摘要: |
| 风火耦合系统在我国北方电网中普遍存在。为了构建电网友好型风电场，主动频率支撑控制被引入风电功率外环，然而该控制可能会影响耦合系统的稳定特性。已有研究主要关注主动频率支撑控制对火电机组主导的机电振荡特性的影响，对风电机组主导的次同步振荡特性影响的研究不多。基于此，建立考虑主动频率支撑控制的风火耦合系统模型，分析在不同风电渗透率和不同锁相环阻尼系数下主动频率支撑控制对耦合系统中火电机组主导的机电振荡模态以及风电机组中锁相环主导的次同步振荡模态的影响，确定耦合系统中锁相环主导的次同步振荡模态的主要影响因素。为了探究主动频率支撑控制影响锁相环主导的次同步振荡的失稳机理，推导了耦合系统计及主动频率支撑控制时锁相环小扰动等效模型，通过复转矩法分析了主动频率支撑控制对锁相环主导的次同步振荡模态的影响。通过时域仿真验证了主动频率支撑控制参数对耦合系统稳定性的影响。 |
| 关键词: 风火耦合系统 虚拟惯量 下垂控制 小扰动稳定性 主动频率支撑控制 机电振荡 次同步振荡 |
| DOI：10.16081/j.epae.202205012 |
| 分类号:TM712;TM614 |
| 基金项目:国家重点研发计划项目(2019YFB1505400) |
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| Small disturbance stability analysis of wind-thermal coupling system considering virtual inertia and droop control |
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YAN Cai1, YAO Wei1, CUI Yan2, SUN Kun1, WEN Jinyu1, GUO Ren2
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1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2.State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006, China
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| Abstract: |
| Wind-thermal coupling system is ubiquitous in North China Power Grid. In order to build grid-friendly wind farms, active frequency support control is introduced into the wind power outer loop, which may affect the stability of the coupling system. Existing researches mainly focus on the influence of active frequency support control on the electromechanical oscillation characteristics dominated by thermal generators, while there are few researches about the influence of active frequency support control on the subsynchronous oscillation characteristics dominated by wind power generators. Based on this, the model of wind-thermal coupling system considering active frequency support control is established. The influence of the active frequency support control on the electromechanical oscillation modes dominated by thermal generators and the subsynchronous oscillation modes dominated by PLL(Phase Locked Loop) in wind power generators under different wind power permeability and different PLL damping coefficients is analyzed, and the main influencing factors of subsynchronous oscillation modes dominated by PLL in the coupling system are determined. In order to explore the instability mechanism of active frequency support control affecting the subsynchronous oscillation dominated by PLL, the small disturbance equivalent model of PLL for the coupling system considering active frequency support control is derived, and the influence of active frequency support control on subsynchronous oscillation modes dominated by PLL is analyzed by using the complex torque method. The influence of active frequency support control parameters on the coupling system stability is verified by time domain simulation. |
| Key words: wind-thermal coupling system virtual inertia droop control small disturbance stability active frequency support control electromechanical oscillation subsynchronous oscillation |
