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直流受端馈入站与近区风电场系统振荡特性分析

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随着高压直流输电工程的不断投产,以及风电项目的增多,越来越多的风电场出现在电网换相换流器高压直流输电(line-commutated-converter based high voltage direct current,LCC-HVDC)受端换流站近区,两者构成的系统存在振荡风险.为此,该文针对直流受端馈入站与近区风电场系统的振荡特性展开研究.首先,建立并验证系统的状态空间模型,基于该模型计算出系统特征值,确定 LCC-HVDC与风电场共同参与的振荡主导模式并进行参与因子分析.进一步地,通过对比是否接入 LCC-HVDC 的主导模式,得到LCC-HVDC 的接入会削弱系统阻尼的结论.最后,从系统额定容量、交流系统短路比、风电场并网线路长度等方面探究系统稳定性的影响因素,并分析系统的不同短路比、潮流比对风机网侧换流器(grid-side converter,GSC)外环控制和换流站定电流控制器性能的影响.
Analysis of the Oscillation Characteristics of HVDC Receiver Feed-in Station and Near-area Wind Farm System
With the construction of HVDC transmission projects and the increase of new energy projects,more and more wind farms appear in the near area of the grid commutated-converter based high voltage direct current(LCC-HVDC)receiving converter station,both of which constitute the system with the risk of oscillation.To this end,this paper investigates the oscillation characteristics of the DC receiving feed-in station and the wind farm system in the near zone.First,a state-space model of the system is developed and validated.Based on the model,the system characteristic values are calculated,and the dominant oscillation modes involving LCC-HVDC and wind farms are selected and analyzed as participation factors.Furthermore,by comparing the dominant modes with and without access to LCC-HVDC,it is concluded that the access to LCC-HVDC weakens the system damping.Finally,the influence factors of system stability are explored in terms of system rated capacity,AC system short-circuit ratio,as well as wind farm grid-connected line length.And the effects of different short-circuit and tidal ratios of the system on controller performance are analyzed.

direct-drive permanent magnet synchronous generator(D-PMSG)line-commutated-converter based high voltage direct current(LCC-HVDC)DC feed-in stationscoupling oscillationssmall-signal analysisparticipation factor analysis

孙康怡、李大虎、姚伟、周泓宇、林思齐、文劲宇

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强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),湖北省 武汉市 430074

国网湖北省电力公司,湖北省 武汉市 430077

直驱风电场 电网换相换流器高压直流输电 直流馈入站 耦合振荡 小信号分析 参与因子分析

国家电网湖北省电力公司科技项目

52150521000W

2024

10.13334/j.0258-8013.pcsee.222835

中国电机工程学报
中国电机工程学会

中国电机工程学报

CSTPCD北大核心
影响因子：2.712
ISSN：0258-8013
年,卷(期)：2024.44(7)
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