摘要
随着双馈风机并网容量的不断增加,其短路电流对电力系统保护的影响不能再忽略不计,不精确的短路电流计算将影响到保护的整定与配置。首先在分析故障期间双馈风机等值内电势特性的基础上,提出了持续励磁情况下双馈风机的暂态等值模型。进一步根据磁链不突变的特性以及我国新并网标准对无功支撑的要求提出了持续励磁情况下双馈风机短路电流的计算方法。基于RTDS建立了含变流器实际控制单元的双馈风机数模实验平台,验证了所提短路电流计算方法的准确性。
With the enlarging scale of doubly-fed induction generator （DFIG） connected to power system, the influence of short-circuit current to system relay protection couldn＇ t be ignored. Setting and configuration of relay protection would be affected by imprecise, short-circuit current calculation. To solve this problem, on the basis of analyzing the characters of DFIG＇s transient EMF, the transient model of DFIG with uninterrupted excitation is provided. Base on the characteristics of magnetic and the requirement of new grid standard reactive current, the calculation method of DFIG short-circuit current is put forward. Based on RTDS the experiment platform with physical controller of converter is founded, the proposed short-circuit current RMS value calculating model is validated.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2016年第1期1-6,共6页
Journal of North China Electric Power University：Natural Science Edition
基金
国家重点基础研究发展计划(973计划)项目(2012CB215206)
