基于PSCAD的双馈式风力发电系统柔性并网研究  

PSCAD Based Research on Flexible Grid-Connection of DFIG Wind Power Generation System

作　　者：安中全[1] 任永峰[1] 李含善[1] 

机构地区：[1]内蒙古工业大学,内蒙古自治区呼和浩特市010051

出　　处：《电网技术》2011年第12期196-201,共6页Power System Technology

基　　金：教育部科学技术研究重点项目(210037);内蒙古自然科学博士基金项目(2011BS0903);内蒙古自然科学基金重大项目(200711020801)~~

摘　　要：双馈式风电机组已成为风电领域应用最为广泛的一种主流机型。推导了双馈电机在发电机惯例下的动态数学模型,用内模控制实现双馈电机转子电流内环和转速外环的控制,提出了基于内模控制的柔性并网运行控制策略,应用PSCAD/EMTDC建立了完备的2 MW并网运行双馈式风力发电系统仿真模型,对风速突变时系统柔性并网响应特性进行了细致的仿真研究。研究结果表明,建立的双馈式风电系统模型控制性能和动态响应速度均较好,提出的控制策略能快速地控制发电机的定子电压满足并网条件。通过风速突变工况仿真模拟可以看出,该系统实现了双馈式风电系统在变风速条件下的柔性并网。仿真结果与理论分析相一致,验证了仿真模型的正确性。At present the doubly-fed induction generator （DFIG） becomes the most widely applied type of wind power generators. According to the convention of generator, a dynamic mathematical model of DFIG is derived, in which the inner loop control of rotor current and outer loop control of rotating speed of DFIG is implemented by internal model control, and a flexible control strategy for grid-connected operation of DFIG based wind power generation system is put forward. Using PSCAD/EMTDC, a complete simulation model of grid-connected DFIG power generation system with capacity of 2MW is built to perform detailed simulation research on the response characteristics of flexibly grid-connected wind power generation system while wind speed abruptly changes. Research results show that the control performance and dynamic response speed of the built DFIG based wind power generation system possesses is satisfied, and the proposed control strategy can rapidly control stator voltage of DFIG and makes it meeting the condition for grid-connection. It can be seen from the simulation of operating condition under abrupt change of wind speed that using the proposed control strategy the DFIG based generation system can be flexibly grid-connected under varying wind speed. Simulation results conform to those from theoretical analysis, thus the correctness of the proposed simulation model is proved.

关 键 词：双馈感应电机 柔性并网 内模控制 PSCAD 风力发电 建模 

分 类 号：TM614[电气工程—电力系统及自动化] TM743