【摘要】 风电系统中的电压源型变流器储能系统得到广泛应用,文章分析以超级电容器为储能元件,采用双向DC/DC变流器控制的储能系统对直驱式风机的影响,提出一种基于超级电容器储能的直驱式风力发电机无功控制策略。通过储能系统和风机变流器协调控制,维持直流电压恒定,提高直驱式风电系统的无功输出能力。最后基于3种无功控制方案的算例进行仿真,仿真结果验证了文章控制策略的可行性和有效性。更多还原

【Abstract】 Currently energy storage system(ESS) with voltage source convertor has been widely used in wind power system, influence of ESSs on direct driven wind turbines is studied in this paper. A control strategy of reactive power is proposed for direct driven wind turbine, which takes super capacitor as energy storage elements in ESS. The ESS is controlled by bidirectional DC/DC converter to change energy transmission direction. With the coordinated control of ESS and the convertor, the proposed control strategy can not only keep the DC link voltage stable, but also improve the reactive power output capability of direct driven wind turbines. The correctness and effectiveness of control strategy are verified by simulation and experiment based three reactive power control scenarios.更多还原