直驱风电场并网系统宽频振荡小干扰稳定判据及稳定性分析  

Small Signal Stability Criterion and Stability Analysis of Wide-band Oscillation in Grid-connected System of Direct-driven Wind Farm

作　　者：季一宁 王海风 JI Yining;WANG Haifeng(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University)Beijing 102206,China;College of Electrical Engineering,Sichuan University,Chengdu 610064,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]四川大学电气工程学院,四川成都610064

出　　处：《华北电力大学学报（自然科学版）》2024年第3期30-39,共10页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52077144).

摘　　要：并网电力系统中多直驱风电机组(direct-driven permanent magnet synchronous generator,PMSG)风电场可能出现次同步/超同步振荡现象,为深入的研究直驱风电场并网系统的宽频振荡,文章对多PMSG风电场并网系统进行了一系列研究。首先,针对次同步振荡频率场景和超同步振荡频率场景分别建立了单台PMSG的简化数学模型。然后,结合风电场的等效降阶法求解了多PMSG风电场并网系统的特征方程,运用劳斯赫尔维兹判据得出各频率场景下并网系统中风电场的稳定性判据,从解析的角度分析了并网系统中各运行参数对系统稳定性的影响。最后,通过一个可扩展的多PMSG风电场并网系统验证了文中提出的风电场等效降阶模型下的稳定判据是可行有效的,并直观的讨论了并网系统中PMSG风电机组数量以及长线路等效电抗变化对并网系统稳定性的影响。Sub-synchronous/super-synchronous oscillations may occur in a grid-connected direct-driven permanent magnet synchronous generators(PMSGs)wind farm.In order to explore the essence of this phenomenon,this paper has carried on a series of studies around grid-connected PMSG wind farms.Firstly,we established a simplified mathematical model of a single PMSG for Sub-synchronous and super-synchronous oscillation phenomena.Then,we solved the characteristic equation of multi-PMSGs wind farm grid-connected system by combining the equivalent order reduction method of wind farm,and obtained the stability criterions of wind farm in grid-connected system under various frequency scenarios by using Routh-Hurwitz criterion,which explaining the influence of operation parameters on the stability of grid-connected system from the mechanism.Finally,the stability criterion under the equivalent reduced-order model of wind farm proposed in this paper was proved to be feasible and effective through an extensible PMSGs wind farm grid-connected system,and we intuitively discussed the influence of the number of PMSGs and the equivalent reactance of long lines on the stability of grid-connected system.

关 键 词：直驱永磁同步发电机 风电场 小干扰稳定 宽频振荡 稳定判据 

分 类 号：TM712[电气工程—电力系统及自动化]