CAJ | 학술논문

同一地区的风电场往往由于地理位置非常接近使得风电场的风速具有一定的相关性。电力系统的暂态稳定评估应当考虑这种相关性。采用Copula函数建立风电场风速的相关性模型，得到具有不同相关性的风速样本以及其联合概率分布。并将建立的相关性模型应用于含风电的电力系统，对系统的暂态稳定进行了研究，用事故的稳定裕度指标表征系统暂态稳定程度。将所述的模型与方法用New England 10机39节点系统进行仿真分析，通过比较不同相关性风速下电力系统的期望稳定裕度，分析了风速相关性对系统暂态稳定性的影响。研究结果表明，风速相关性对电力系统的暂态稳定有重要影响，Copula 函数可以合理地分析风速相关性对暂态稳定的影响，对相关理论与实践研究具有一定的指导作用。
동일지구적풍전장왕왕유우지리위치비상접근사득풍전장적풍속구유일정적상관성。전력계통적잠태은정평고응당고필저충상관성。채용Copula함수건립풍전장풍속적상관성모형，득도구유불동상관성적풍속양본이급기연합개솔분포。병장건립적상관성모형응용우함풍전적전력계통，대계통적잠태은정진행료연구，용사고적은정유도지표표정계통잠태은정정도。장소술적모형여방법용New England 10궤39절점계통진행방진분석，통과비교불동상관성풍속하전력계통적기망은정유도，분석료풍속상관성대계통잠태은정성적영향。연구결과표명，풍속상관성대전력계통적잠태은정유중요영향，Copula 함수가이합리지분석풍속상관성대잠태은정적영향，대상관이론여실천연구구유일정적지도작용。
Wind farms in the same area are often very close in geographical location so that their wind speeds have certain correlation. Transient stability risk assessment of power system should consider the correlation. Copula function is used to establish correlation model of wind speeds in this paper, wind speed samples and joint probability distribution are obtained for different correlations. Transient stability of power system with wind farms is studied, and stability margin of accidence is used to characterize system transient stability degree. The model and method are applied in New England 10-machine 39-bus system, transient stability margin indexes of every risk factor under different correlations of wind speed are compared. The result indicates that correlation of wind speed has an important influence on transient stability of power system, and Copula function is reasonable in analyzing influence on transient stability. The conclusion is of guiding role to theory and practice research.