双馈感应发电机准同期并网技术的研究  

A Study on Synchronized Cut-in Technology of Doubly-Fed Induction Generator Wind Turbine

作　　者：徐源源[1,2] 黄石[1] 向大为[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆市电力公司沙坪坝供电局,重庆400030

出　　处：《电机与控制应用》2009年第7期44-48,共5页Electric machines & control application

基　　金：重庆市科委自然科学基金计划资助项目(CSTC2007BB0113)

摘　　要：作为主流风力发电技术,双馈感应发电机具有变速恒频运行,优越的暂、稳态运行性能及相对较小的励磁容量等特点。随着风电机组单机容量的增大,其并网问题越来越受到人们的重视。结合双馈感应发电机并网运行的特点,模拟传统同步发电机准同期并网方法,对现有基于矢量控制的双馈感应风力发电机功率控制策略进行了适当修改。新方法在实现发电机组快速、安全并入电网的同时,简化了控制器的硬件和软件复杂性。为验证改进的准同期并网控制原理的正确性,建立了双馈感应风力发电系统MW级仿真模型及15kW试验机组。仿真与试验研究验证了准同期并网技术的正确性和可行性,从而为该技术的工程实际运用奠定了相应的理论基础。As a mainstream wind power generation technology, doubly-fed induction generator （DFIG） features variable-speed-constant-frequency operation, excellent transient and steady States performance and partial rated excitation converter. Since the rating of wind turbine unit is growing continuously, the cut-in problem gradually becomes a concern in wind power industry. By emulating the cut-in process of traditional synchronous generator, a synchronized cut-in method suitable for DFIG wind turbine is investigated. According to the operating characteristics during grid cut-in transient, the existing vector control based DFIG power strategy was properly modified. While the new method can start up DFIG and connect it into grid rapidly and safely, the complexity of hardware and software in the controller is simplified. Simulation model with a 2MW DFIG and test rig with a 15 kW DFIG were built. The validity and feasibility of the method were confirmed by simulation as well as experiment. It is hoped that the study in this paper could provide a theoretical basis for industry application of this technology.

关 键 词：双馈感应风力发电机 风力发电 准同期并网 

分 类 号：TM346[电气工程—电机]