DFIG风电场短路电流计算影响因素分析

摘要

With the increasing capacity of wind farms, the analysis of short circuit current of wind farms is becoming more and more important.The doubly fed induction generator (DFIG)is widely used in the domestic wind farms that have been put into operation in China. Studying the short-circuit current characteristics of the DFIG wind farm is of great significance to the calculation of short-circuit current and the analysis of restrictive measures in the power grid. In order to analyze the influence factors of the short-circuit current characteristic of the DFIG wind farm, the short-circuit current calculation model of the DFIG wind farm is set up firstly. Then the factors that may affect the short-circuit current of the DFIG wind farm are analyzed based on the model. At last, a DFIG wind farm interconnected grid is established on the DIgSILENT platform. The influence of wind speed,fault type,fault location,collector impedance,Crowbar resistance and control method on the short-circuit current of the DFIG wind farm is simulated and analyzed, which provides a reference for the further study of the short-circuit current characteristics of the DFIG wind farm.%随着双馈风电发电机组并网容量的不断增加,研究双馈型风电场的短路电流特性具有重要意义.文章建立了双馈型风电场的短路电流计算模型,基于该模型分析了可能影响双馈型风电场短路电流的因素.利用DIgSILENT仿真软件建立了并网运行的双馈型风电场,仿真分析了风电场风速、集电阻抗、Crowbar阻值、故障点位置、故障类型、控制方式等因素对双馈型风电场短路电流的影响.为进一步全面研究双馈型风电场的短路电流特性提供参考.