超导储能提高直驱风电系统低电压穿越能力的控制策略  

Control strategy for improvement on low-voltage ride through ability of directdriven wind power system by using superconductive energy storage

作　　者：董瑞洪[1] 党存禄[2] 林国富[2] 

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050 [2]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2013年第2期80-85,共6页Journal of Lanzhou University of Technology

摘　　要：针对电网故障、扰动引起的电网电压跌落给并网运行的永磁直驱风力发电系统带来的问题,应用超导储能系统提高永磁直驱风力发电系统的低电压穿越能力.研究永磁直驱风力发电系统以及超导储能系统的数学模型,设计相应的控制策略.利用Matlab/Simulink工具箱搭建系统仿真模型,给出不同电网电压跌落状况下,添加超导储能系统前后的仿真实验结果,并对实验结果进行对比分析.结果显示,当电网电压跌落时,超导储能系统能迅速平衡直流母线的功率变化,使直流母线电压保持稳定,直驱风电系统低电压穿越能力得到一定的提高.Aimed at the problem brought by the grid direct-drive permanent-magnet wind power generation energy storage system was employed to improve the voltage sag due to grid fault and disturbance to the system operating with the grid, a superconductive low-voltage ride through ability of the wind power system. The mathematic models were investigated for both this power generation system and supercon- ductive energy storage system and their corresponding control strategies were designed. The Matlab/Sim- ulink toolbox was used to build a system simulation model and its experimental results before and after adding the superconductive energy storage system were given in different conditions of grid voltage sag- ging. The experimental results were compared and analyzed. The simulation result showed that when the grid voltage sag happened, the superconductive energy storage system could quickly balance the DC bus power changes, so that the DC bus voltage would be kept stable, and the low-voltage ride through ability of wind power system would be improved to some extent.

关 键 词：风力发电 永磁直驱 变换器控制 低电压穿越 超导储能系统 

分 类 号：TM71[电气工程—电力系统及自动化]