用于系统暂态行为分析的双馈风机转子转速控制时间尺度暂态模型  

Modelling of DFIG-based WT for Power System Transient Responses Analysis in Rotor Speed Control Timescale

作　　者：唐王倩云 张睿[1] 胡家兵[1] TANG Wangqianyun;ZHANG Rui;HU Jiabing(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2021年第9期3037-3045,共9页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFB0900100)。

摘　　要：随着风力发电持续快速发展,风电并网系统的暂态行为正发生显著变化,对安全稳定运行带来挑战。发电装备暂态特性不同是导致风电并网系统暂态行为相较传统系统发生变化的重要原因。目前对风机暂态特性的认识大多依据基于实际结构的模块化数值仿真模型或针对特定控制方式的静态电路元件模型,缺乏对风机暂态特性的一般化描述和机理解释。该文以双馈风机为对象,综合考虑几种典型控制方式(包括常规控制、惯量控制等),运用基于"功率激励–内电势响应"关系的建模方法构建适用于双馈风机转子转速控制时间尺度(约秒级,与传统机电尺度相近)暂态行为分析的统一暂态模型。该模型从电力系统稳定目标和暂态过程演化基本因果关系入手,具有与同步机转子运动方程相似的形式,便于分析电力系统暂态行为及解释稳定机理。基于此,分别阐释多种控制方式下双馈风机的转子转速尺度暂态行为及物理过程。With the rapid development of wind generation, the transient responses of wind turbine(WT)-connected power system are significantly changing, which challenges the safe and stable operation of power system. The transient characteristics of power generation equipment variation is the important factor that leads to the change of transient responses of the power system. At present, the transient characteristic analysis is mainly based on the modularized numerical simulation model or static component model for specific control mode, but still lacks of a general description and mechanism explanation. For analyzing the transient responses in rotor speed timescale(about seconds, corresponding to electromechanical timescale), this paper proposed a unified transient model of doubly fed induction generator(DFIG)-based WT based on power excitation-internal voltage response modeling concept, in which several typical control strategies(e.g. conventional control, inertia control) were considered. This model derives from the causal relationship of transient response and has the similar form to the synchronous generator(SG), which could be applied to transient response analysis and mechanism explanation. Based on the proposed model, the transient responses and physical processes of DFIG-based WT with different control strategies are elaborated respectively.

关 键 词：转子转速控制时间尺度 多种控制方式 双馈风机 “激励-响应”关系模型 暂态行为 物理过程 

分 类 号：TM31[电气工程—电机]