电力建设2016，Vol.37Issue(12)：68-73,6.DOI:10.3969/j.issn.1000-7229.2016.12.009
基于模式切换的永磁同步风力发电机组低电压穿越控制策略
Low Voltage Ride-through Control Strategy for PMSG Based on Control Mode Switch
摘要
Abstract
With the increase of installed capacity of wind farm, the operation stability of wind power system during grid disturbances becomes important. Grid codes require that wind power system stays connected to the grid during voltage dips for a certain period, with the ability of low-voltage ride-through (LVRT). For permanent magnet synchronous generator ( PMSG) , the key to improve the ability of LVRT is that fast control DC-Link voltage when grid-voltage dips. This paper proposes a LVRT control strategy for PMSG unit based on control mode switch. The strategy changes the control mode between in normal and fault of grid-voltage, and adopts the grid-side converter or generator-side converter to control the DC-Link voltage respectively. In addition, this paper proposes an improved feed-forward method to speed up the DC bus control, which can accelerate the speed control and reduce the peak value of the DC bus voltage. The simulation results validate the effectiveness of the proposed strategy.关键词
永磁同步风力发电机(PMSG)/低电压穿越(LVRT)/模式切换控制/改进前馈Key words
permanent magnet synchronous generator ( PMSG )/low-voltage ride-through ( LVRT )/mode switch control/improved feed-forward分类
信息技术与安全科学引用本文复制引用
钟诚,魏来,严干贵..基于模式切换的永磁同步风力发电机组低电压穿越控制策略[J].电力建设,2016,37(12):68-73,6.基金项目
国家自然科学基金项目(51277024) Project supported by National Natural Science Foundation of China (51277024) （51277024）
