风电经分频输电并网系统穿透能力计算方法研究  

Research on Calculation Method of Penetration Limit of Wind Power Integrated via Fractional Frequency Transmission System

作　　者：李熠[1] 滕予非 朱丽嫚 李小鹏 Li Yi;Teng Yufei;Zhu Liman;Li Xiaopeng(State Grid Sichuan Electric Power Company,Chengdu 610041,Sichuan,China;State Grid Sichuan Electric Power Research Institute,Chengdu 610041,Sichuan,China;State Grid Chengdu Electric Power Supply Company,Chengdu 610041,Sichuan,China)

机构地区：[1]国网四川省电力公司,四川成都610041 [2]国网四川省电力公司电力科学研究院,四川成都610041 [3]国网成都供电公司,四川成都610041

出　　处：《四川电力技术》2018年第4期50-54,共5页Sichuan Electric Power Technology

摘　　要：风电经分频输电并网是一种全新的风电并网方案。在对该系统结构及优点进行介绍的基础上,提出了一种基于静态安全约束的穿越功率极限计算方法。该方法可以应用于常规风电并网系统以及风电经分频输电并网系统。最后,在RTS24节点测试系统中对3种风电并网方案进行分析,对其风电穿透能力进行了对比。分析结果表明,与风电就近并入电网边界相比,利用分频或者工频传输系统将风电传输至负荷中心可以数倍地提高风电的穿越功率极限的结论。由此可见,分频输电系统为风电并网提供了一种全新的方案,具有经济与技术优势,在大型风电场中有着很好的应用前景。Fractional frequency transmission system（ FFTS） provides a new approach for integrating remote large-capacity wind power to grid. Firstly,the structure and advantages of this system are introduced. Then,an optimization method is proposed to determine the penetration limit of wind power by considering static security constraints. This method could be used for the system integrated wind system via FFTS and that via conventional transmission approach. Finally,three schemes are designed to integrate wind power to RTS-24 testing system,and the the penetration limits of these schemes are compared. The results indicate that the penetration limits are increased obviously when the wind power is transmitted to load center instead of the border of the grid. Therefore,integrating wind farm to power grid via FFTS is a very promising approach to benefit wind power industry.

关 键 词：风电并网 分频输电 穿透率 优化方法 交交变频器 

分 类 号：TM614[电气工程—电力系统及自动化]