电力系统自动化2013，Vol.37Issue(6)：7-11,62,6.DOI:10.7500/AEPS201205255
双馈风电机组暂态特性分析及低电压穿越方案
Transient Characteristics Analysis and Low Voltage Ride-through Scheme of Doubly-fed Wind Turbine Generators
摘要
Abstract
A new method for calculating the rotor transient current is proposed, which deals with the electromagnetic transient progress of generators following a grid fault as the superposition of different states, and considers the stator voltage fault component, the rotor voltage fault component, and the transient impact of putting into a Crowbar. The relationship function of the rotor voltage peak value and Crowbar resistance is derived, so the appropriate Crowbar resistance can be set using the mapping method. Account for the control of generators during the grid fault after removing the Crowbar, a low voltage ride-through (LVRT) scheme is given, in which the active and reactive references adaptively adjusted according to the voltage sag depth. As a result, the doubly-fed wind turbine generator can give certain amount of reactive power support during the voltage sag. Finally, simulations of a 1.5 MW doubly-fed wind turbine generator case were carried out and the results show that the new method is correct and effective.关键词
风力发电/双馈感应发电机/低电压穿越/暂态特性/Crowbar电路/叠加法Key words
wind power/doubly-fed induction generator (DFIG)/low voltage ride-through (LVRT)/transient characteristics/Crowbar/superposition method引用本文复制引用
张艳霞,童锐,赵杰,宣文博..双馈风电机组暂态特性分析及低电压穿越方案[J].电力系统自动化,2013,37(6):7-11,62,6.
