孙康怡, 李大虎, 姚伟, 周泓宇, 林思齐, 文劲宇. 直流受端馈入站与近区风电场系统振荡特性分析[J]. 中国电机工程学报, 2024, 44(7): 2685-2698. DOI: 10.13334/j.0258-8013.pcsee.222835
引用本文: 孙康怡, 李大虎, 姚伟, 周泓宇, 林思齐, 文劲宇. 直流受端馈入站与近区风电场系统振荡特性分析[J]. 中国电机工程学报, 2024, 44(7): 2685-2698. DOI: 10.13334/j.0258-8013.pcsee.222835
SUN Kangyi, LI Dahu, YAO Wei, ZHOU Hongyu, LIN Siqi, WEN Jinyu. Analysis of the Oscillation Characteristics of HVDC Receiver Feed-in Station and Near-area Wind Farm System[J]. Proceedings of the CSEE, 2024, 44(7): 2685-2698. DOI: 10.13334/j.0258-8013.pcsee.222835
Citation: SUN Kangyi, LI Dahu, YAO Wei, ZHOU Hongyu, LIN Siqi, WEN Jinyu. Analysis of the Oscillation Characteristics of HVDC Receiver Feed-in Station and Near-area Wind Farm System[J]. Proceedings of the CSEE, 2024, 44(7): 2685-2698. DOI: 10.13334/j.0258-8013.pcsee.222835

直流受端馈入站与近区风电场系统振荡特性分析

Analysis of the Oscillation Characteristics of HVDC Receiver Feed-in Station and Near-area Wind Farm System

  • 摘要: 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。

     

    Abstract: 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.

     

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