Short-circuit Current Engineering Calculation Method Considering Crowbar Operation Priority Degree of DFIG

Abstract When fault occurs in high wind power proportion grid, the control strategy and external characteristics of plant are affected by voltage drop so traditional short-circuit current engineering calculation is difficult to converge. A method for considering grid node importance evaluation crowbar protection DFIG(double-fed induction generator), proposed. This paper proposes equivalent model DFIG when considers degree indexes, determines weight each index through Delphi method. The operation priority evaluated ensure successful convergence maximum support plants. study case shows that proposed superior