2mw风力发电机设计研究中英文.docxVIP

郑州工业应用技术学院学生课程考核专业外文翻译原 文：Design Study of Doubly-Fed Induction Generators for a 2MW Wind Turbine 译 文： 2MW风力双馈异步电动机的研究设计 学 院： 机电工程学院专 业： 12级电气工程及其自动化 班 级： 一 班课 程： 电气工程专业英语学生姓名： 向 雷学 号： 1 2 0 2 1 2 0 1 1 8 时 间： 2015年12月21日成绩评定： Design Study of Doubly-Fed Induction Generators for a 2MW Wind Turbine1. INTRODUCTION For wind turbines, especially those who have a many megawatts of fan motor rated power, they are both popular and environmental protection, can also use fossil fuels. Legislation to encourage the reduction with carbon, so the wind motor is of great potential for development of renewable energy in the world.Wind turbines are viewed as a well established technology that has developed from fixed speed wind turbines to the now popular variable speed technology based on doubly-fed induction generators (DFIGs). A DFIG wind turbine is variable speed with the rotor converter being controlled so that the rotor voltage phase and magnitude is adjusted to maintain the optimum torque and the necessary stator power factor [1, 2, 3]. DFIG technology is currently well developed and is commonly used in wind turbines. The stator of a DFIG is directly connected to the grid with a power electronic rotor converter utilised between the rotor winding and the grid. The variable speed range is proportional to the rating of the rotor converter and so by limiting the speed range to ±30% [4, 5, 6, 7] the rotor converter need only be rated for 30% of the total DFIG power whilst enabling full control over the full generator output power. This can result in significant cost savings for the rotor converter [4]. The slip ring connection to the rotor winding however must be maintained for reliable performance.2. CONNECTION METHODS The grid side inverter (GSI) is controlled to maintain a fixed dc link voltage with a given power factor at the grid. The rotor side inverter (RSI) is controlled so the maximum energy is extracted from the kinetic energy of the wind