高压电器2013，Vol.49Issue(8)：74-80,7.
风电场低电压穿越过程中短路信号的研究
Study on Short-circuit Faults During LVRT in Wind Farm
摘要
Abstract
To analyze the short-circuit faults occurred in wind farm system while power system voltage drops,a mathematical dynamic model and a steady-state model of wind farm with DFIG are established in the synchronous rotary coordinates.In the condition of continuously connecting wind farm to grid and keeping power generation on the MATLAB/SIMULINK platform,the LVRT ability of wind farm without short-circuit fault or with short-circuit faults in some generators is analyzed,and wavelet-based fault analysis is performed.With simulation,some main electrical parameters are easily obtained.Conclusions can be drawn from the simulation results that:steady LVRT of wind farm system can be completed in the condition of single phase short-circuit fault; while the situation gets worse for two-phase or three-phase fault,where voltage recovers within a moment,and both wind farm and power system will endure a great deal of energy flow.So the faulty phase should be cut off before voltage recovery.关键词
风电场/电力系统/低电压穿越/短路故障/DFIGKey words
wind farm/ power system/ low voltage ride-through (LVRT)/ short-circuit fault/ DFIG分类
信息技术与安全科学引用本文复制引用
张强,王维庆..风电场低电压穿越过程中短路信号的研究[J].高压电器,2013,49(8):74-80,7.基金项目
国家自然科学基金(50867004). （50867004）
Project Supported by National Natural Science Foundation of China(50867004). （50867004）
