随着海上风电场的发展和高压直流输电技术的应用,风电场系统存在交流侧故障穿越的问题。针对这个问题,提出了一种用于故障穿越的基于模块化多电平变频器和双三相异步电机的飞轮储能系统,并设计了其驱动控制方案。飞轮储能系统采用了模块化多电平技术能方便地构建大功率高压变频器,并具备扩容能力。为了提高飞轮储能系统的可靠性,采用了双三相异步电机驱动,从而提高了冗余性。接着设计了能均衡各个模块电容电压的双三相异步电机驱动控制算法。最后,基于MATLAB/Simulink仿真平台建立了风电场和飞轮储能系统的仿真模型,进行了仿真计算。仿真结果验证了飞轮储能系统的功能和驱动控制策略的性能。

Along with the development of offshore wind farm and the application of high voltage direct current transmission technology, the problem of the fault ride through had been serious when the AC side of the wind farm faults. Aiming at it, a new flywheel energy storage system for fault ride through was presented, which was based on modular multilevel converter and dual three phase asychronous motor, and design the controller of the system. The flywheel energy storage system used the modular multilevel converter technology to construct the high power and high voltage converter, and the capacity expansion has been obtained. In order to improve the reliability of the flywheel energy storage system, a dual threephase asychronous motor drive was adopted, and the redundancy had been gained. Then a dual threephase asychronous motor drive control algorithm which could balance the capacitor voltage of each module was designed. At last, based on the MATLAB/Simulink platform, the model of the wind farm and the flywheel energy storage system had been simulated and studied. And the simulation verified the functions of the flywheel energy storage system and the performances of the driven control strategy.

TM 46

湖南省省级科学研究课题(14C0265):抑制变频电机高次谐波的优化设计与研究