Design and development of interior permanent magnet wind generator system

当前，环境意识的增强、积极的经济状况和技术发展的共同作用，促使全球积极努力，使风力发电成为可再生和可持续能源的关键组成部分。大型风力发电厂涉及变速内置式永磁同步发电机，以及现代电力系统中风电穿透能力的提高，正成为世界范围内的一项工程挑战。传统的风力发电机是带有笼型转子和双馈绕线型转子的感应电机，其单位风力发电量很小且有限。这些感应风力发电机通过复杂的风力涡轮机机械控制以固定的超同步速度运行。在风力发电系统中，变速发电系统由于风能产量的提高、发电机容量的增大和闪变的减少，比定速发电系统更具优势。使用IPM风力发电系统，通过将轴速调整为最优风能发电，风力涡轮机可以在不同风速下以最大功率生产点运行。设计、开发和试验了一套IPM风力发电机组，以充分发挥IPM风力发电机的高效率、高功率因数、体积小、额定功率大、可控性强、运行稳定、内置附加磁阻转矩和低成本的优点。建议的IPM风力发电系统将产生最大输出功率，同时考虑到风力涡轮机的特性和电力电子转换器的限制。两台原型式高效IPM风力发电机

The current confluence of enhanced environmental awareness, positive economic conditions and technical developments has led vigorous global efforts toward making wind power a key component of renewable and sustainable energy resources. Large wind plants involving variable speed interior permanent magnet (IPM) synchronous generators and increasing level of wind power penetration in modern power system is becoming an engineering challenge throughout the world. The conventional wind generators are induction machines with cage-rotor and doubly fed wound-rotor types having small and limited wind power production per unit. These induction wind generators are operated at fixed super synchronous speed by intricate mechanical control of wind turbines. In wind power generation systems, variable-speed generation systems are more advantageous than the fixed-speed systems due to improved wind energy production, large capacity generators and reduction of flickers. Using IPM wind generator system, the wind turbine can be operated at its maximum power production point for various wind speeds by adjusting its shaft speed to its optimal generated electrical power from wind energy. Design, development and testing of a set of IPM wind generators are proposed in this proposal to take advantage of high efficiency and high power factor, compact size, large rating, high controllability, stable operation, built-in additional reluctance torque and low cost. The proposed IPM wind generator system will yield maximum output power while taking into account the wind turbine characteristics and constraints of power electronic converters. Two proto-type high efficient IPM wind generators are