变速恒频双馈电机风电场电压控制策略  

A Voltage Control Strategy for Wind Farms Using Doubly Fed Induction Generator Wind Turbines

作　　者：曹军[1] 张榕林[2] 林国庆[2] 王虹富[1] 邱家驹[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]福建省电力试验研究院,福建省福州市350007

出　　处：《电力系统自动化》2009年第4期87-91,共5页Automation of Electric Power Systems

摘　　要：提出了一种基于变速恒频双馈电机的风电场电压控制策略,该策略以风电场出口升压变压器高压侧电压为控制目标。介绍了该控制策略的总体结构,阐述了风电场高压侧电压控制的原理,并考虑风电场无功功率极限,研究了无功功率控制、分配和故障情况下紧急电压控制方案。针对风速扰动和电压骤降2种情况进行了仿真。仿真结果表明,所提出的控制方案与功率因数控制和传统的电压控制策略相比可以明显地提升风电场电压水平,且无需高压侧信号、经济有效。A voltage control strategy is introduced for wind farms using the doubly fed induction generator （DFIG）. The strategy aims at controlling the voltage at the wind farms step-up transformer high voltage side. The overall configuration of voltage control and the principal are described, taking into account of the reactive power limits of wind turbines. The reactive power control, distribution and emergency voltage control under the system fault conditions are also studied. Both wind-speed variation and voltage-sag are simulated to compare the dynamic responses of the system with power factor control and traditional voltage control. Simulation results show that the voltage control strategy can maintain the wind farm voltage level without any additional feedback signal from high voltage side of the step-up transformer. The control strategy is proved to be economical and efficient.

关 键 词：风电场 双馈电机 变速恒频 高压侧电压控制 无功功率控制 紧急电压控制 

分 类 号：TM614[电气工程—电力系统及自动化] TM761