CAJ | 학술논문

以定速异步风电机组为例，建立包括三质量块轴系数学模型在内的风机模型，在此基础上建立了定速异步机型风电场多机小扰动仿真模型，研究该机型下同型风电场扭振模态及其相关因子，并对比不同风机数量及布局的风电场扭振模态。结果显示，风电场机组间轴系扭振模态出现双谐振尖峰现象，风机数量增加将导致扭振模态特征值实部趋于正半轴并且阻尼比降低；风电场机组间存在扭振传递作用，风电场风机数量和布局将影响系统的小干扰稳定性。
이정속이보풍전궤조위례，건립포괄삼질량괴축계수학모형재내적풍궤모형，재차기출상건립료정속이보궤형풍전장다궤소우동방진모형，연구해궤형하동형풍전장뉴진모태급기상관인자，병대비불동풍궤수량급포국적풍전장뉴진모태。결과현시，풍전장궤조간축계뉴진모태출현쌍해진첨봉현상，풍궤수량증가장도치뉴진모태특정치실부추우정반축병차조니비강저；풍전장궤조간존재뉴진전체작용，풍전장풍궤수량화포국장영향계통적소간우은정성。
Taking fixed speed induction generator (FSIG) unit for example, a wind turbine model including three mass equivalent model of shafting system is established. On this basis a small signal simulation model for wind farm composed of FSIGs is built to research the torsional vibration pattern occurred in homotype wind farm and its correlation factor, and the torsional vibration patterns of wind farms with different layouts and numbers of wind turbines are compared. Comparison results show that in the shaft torsional vibration pattern among wind farm units the double resonance peak phenomenon appears, and the increase of wind turbine number makes the real part of the eigenvalue of torsional vibrating pattern trending toward positive axis and corresponding damping ratio is decreased;the torsional vibration transferring among wind turbines in the same wind farm exists, and the number and layout of wind turbines in the wind farm influence the small signal stability of the wind farm.