The Mechanism of DFIGs Grouping Tripped Off from Power Grid  

作　　者：Gang Mu Jian Wang Gangui Yan 

机构地区：[1]School of Electrical Engineering(Northeast Electric Power University),Jilin 132012,China

出　　处：《CSEE Journal of Power and Energy Systems》2018年第1期103-111,共9页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the National Basic Research Program of China(2013CB228201)。

摘　　要：With more and more big wind farms integrating to grid,the faults of doubly fed induction generators(DFIGs)grouping tripped off(GTO)have occurred and bring serious power impacts on the grid.Usually,it was considered that the fault of DFIGs GTO is only related to the low/high voltage disturbances in the grid and manipulated as an electromagnetic transients.But,we discover that the fault of DFIGs GTO are also related to operating condition of DFIGs and schemes of crowbar protection equipped with DFIGs,and it may be extended to an electromechanical transient in some situations.Based on the investigation of the factors related to DFIGs GTO,such as degree of voltage disturbances,operating conditions of DFIGs and schemes of crowbar protection,three types of DFIGs GTOs are classified and corresponding mechanisms are revealed.The calculation methods to confirm the mechanism are established.The effectiveness of the proposed methods are verified by simulating some cases of DFISs GTO.

关 键 词：Doubly fed induction generator(DFIG) grouping tripped off(GTO) simultaneously grouping tripped off(SGTO) cascading grouping tripped off(CGTO) over-speed grouping tripped off(OGTO) 

分 类 号：TN3[电子电信—物理电子学]