电力系统自动化Issue(3)：23-29,7.DOI:10.7500/AEPS20140206004
提高直驱永磁风机低电压穿越能力的功率协调控制方法
Coordinated Power Control Method for Improving Low Voltage Ride Through Capability of Wind Turbines with Permanent Magnet Synchronous Generators
摘要
Abstract
Based on an analysis of the low voltage ride through (LVRT) mechanism of wind turbines with permanent magnet synchronous generators (PMSGs),a novel power coordinated control method is proposed for PMSG.In the proposed method, the modified pitch angle control and converter control are used.Under transient state low voltage,part of the energy generated by the wind turbine is undertaken by the rotor and DC bus capacitance.This will weaken the impact of the unbalanced energy on the mechanical shafting.The pitch system is used to decrease the wind energy captured by the wind turbine to relieve the LVRT burden of the unit.To reduce the amplitude of the drop of the grid-side voltage,the grid-side converter is controlled to provide dynamic reactive power to the grid. The coordinated current limiting control is also adopted to guarantee the implementation of the wind turbine's control objectives.The proposed method needs no additional hardware but is able to make full use of the control methods available of the PMSG itself to enhance the LVRT capability of PMSG in the whole wind speed range.Finally,the practicability and effectiveness of the proposed method is verified by the simulation example set in DIgSILENT/Power Factory.关键词
直驱永磁同步风力发电机/低电压穿越/功率协调控制/变流器控制/桨距角控制Key words
wind turbine with permanent magnet synchronous generator/low voltage ride through/coordinated power control/converter control/pitch angle control引用本文复制引用
刘忠义,刘崇茹,李庚银..提高直驱永磁风机低电压穿越能力的功率协调控制方法[J].电力系统自动化,2015,(3):23-29,7.基金项目
国家自然科学基金重大项目(51190103) （51190103）
国家高技术研究发展计划(863计划)资助项目(2012AA050208) （863计划）
教育部新世纪优秀人才支持计划资助项目(NCET-12-0846)。This work is supported by National Natural Science Foundation of China (No.51190103),National High Technology Research and Development Program of China(863 Program)(No.2012AA050208) and Program for New Century Excellent Talents in University(No.NCET-12-0846) （NCET-12-0846）
