电力系统自动化2025，Vol.49Issue(3)：93-102,10.DOI:10.7500/AEPS20240316002
撬棒保护投入下考虑多影响因素的双馈风机电流包络区间计算
Calculation of DFIG Current Envelope Intervals with Crowbar Protection Switched on Considering Multiple Influencing Factors
摘要
Abstract
Unlike traditional generators,the output current of a doubly-fed induction generator(DFIG)with crowbar protection switched on contains a considerable rotor frequency component close to the power frequency,which cannot be filtered out by protection algorithms based on power frequency measurement principles,posing a challenge to the setting of the power frequency protection in the new power systems.Based on the time-domain expression of the DFIG output current with crowbar protection switched on,this paper comprehensively analyzes the different factors that affect the envelope intervals,explores the calculation method of each factor in the envelope intervals by categorizing and summarizing them,and obtains a two-layer overall calculation process.On this basis,the calculation method for the DFIG current envelope intervals with crowbar protection switched on is proposed.This method takes into account various possible fault conditions,and comprehensively considers the influence of different factors on the rotor frequency component,and obtains a more accurate output current envelope interval by setting discrete steps and solving point by point.The simulation of DFIG integrating the infinity system is carried out on the MATLAB/Simulink platform.The results indicate that the errors between the calculated values of the proposed method and simulated values are relatively small,thus verifying the correctness of the proposed calculation method.关键词
保护定值整定/故障工况/双馈风机(DFIG)/撬棒保护/工频测量/包络区间Key words
protection value setting/fault condition/doubly-fed induction generator(DFIG)/crowbar protection/power frequency measurement/envelope interval引用本文复制引用
黄琛,沈毅,李银红..撬棒保护投入下考虑多影响因素的双馈风机电流包络区间计算[J].电力系统自动化,2025,49(3):93-102,10.基金项目
国家自然科学基金资助项目(52207107). This work is supported by National Natural Science Foundation of China(No.52207107). （52207107）
