整流型鼠笼异步风力发电机的电压控制  

Voltage control of a rectification-type cage induction generator for wind power generation

作　　者：周苗生[1] 孙旭东[1] 柴建云[1] 翟庆志[2] 

机构地区：[1]清华大学电机工程与应用电子技术系,电力系统及大型发电设备安全控制和仿真国家重点实验室,北京100084 [2]中国农业大学信息与电气工程学院,北京100083

出　　处：《清华大学学报（自然科学版）》2008年第4期465-468,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家“十一五”科技支撑项目(2006BAJ04B03);台达电力电子科教发展计划基金项目

摘　　要：变速恒频运行的鼠笼异步风力发电机系统多采用全功率双脉宽调制交直交变换。为了减小变流器容量,提出一种整流型系统结构及其电压控制策略。用与发电机并联的变流器和电容器补偿发电机励磁电流,调节发电机电压;发电机接不控整流桥和逆变器为交流负载供电。分析了发电机建压电容的选取,对系统电压控制方法进行了仿真和实验研究。当转速和负载在一定范围变化时,整流电压都能保持基本恒定,且变流器的补偿电流较小,证明了该系统结构的可行性和控制方法的有效性。Dual pulse width modulation AC-DC-AC converters are widely used in variable-speed constant-frequency （VSCF） wind power generation systems with cage induction generators （IGs）. A rectification-type VSCF IG system topology and its voltage control strategy were developed to reduce the converter capacity. A pulse width modulation converter in parallel with the IG through inductors and build-up capacitors are installed to regulate the IG voltage by compensating its excitation current, and a diode rectifier connected with the IG and an inverter are used to feed the AC loads. The principles for determining the capacitor size are presented, with the voltage control method illustrated by simulations and experiments. The voltage is regulated to be constant with a low compensating current when the speed and load vary over a specified range, which shows that the system is practical and effective.

关 键 词：风力发电 鼠笼异步发电机 变流器 电压控制 

分 类 号：TM91[电气工程—电力电子与电力传动] TM46