基于转子动能的DFIG频率控制策略研究  

Frequency Control Strategy of DFIG Based on Rotational Kinetic Energy

作　　者：赵晶晶[1] 吕雪[1] 胡晓光[1] 张旭航 

机构地区：[1]上海电力学院电气工程学院,上海市杨浦区200090 [2]国网上海电力公司电力经济技术研究院,上海市虹口区200080

出　　处：《智能电网》2017年第4期379-382,共4页Smart Grid

基　　金：国家自然科学基金资助项目(51207087);上海市教委科研创新项目(NO.12YZ143)~~

摘　　要：变速恒频双馈风电机(doubly fed induction generation,DFIG)通过电力电子设备接入电网,所以它的有功功率输出与电网频率解耦,而且它的最大风能追踪策略使其缺乏备用,这导致DFIG对电力系统的频率调节几乎没用贡献。因此,在DFIG传统控制策略的基础上,通过研究DFIG转子动能与电力系统频率变化关系,提出转子动能控制策略。在最大风能跟踪基础上增加频率控制环节,使得电网频率变化时DFIG可迅速释放出"隐藏"的转子动能,从而为电力系统的频率变化提供支持。A doubly fed induction generation （DFIG） naturally does not provide frequency regulation support for power system, as the electronic convertor which it used to connect with grid decouples its active power output and the grid frequency, what＇s more, the maximum power point tracking strategy makes the wind turbine generator lack power reserve. Therefore, based on the conventional control strategy of DFIG and through studying the relationship between the rotational kinetic energy of DFIG and the frequency changes of power system, a frequency control strategy based on rotational kinetic energy is presented. Frequency controlling is added on the basis of maximum power point tracking operation, which makes DFIG can rapidly release the ＂hidden＂ rotational kinetic energy when grid frequency changes, and as a result, the DFIG can provide support for the frequency changes of the power system.

关 键 词：变速恒频双馈风电机 转子动能 频率控制 

分 类 号：TM614[电气工程—电力系统及自动化]