论文部分内容阅读
独立运行的无刷双馈发电系统在突加阻感性负载时，定子功率绕组输出电压产生的瞬时电压跌落过大不能满足供电质量的要求，该文通过负载侧变换器补偿负载无功电流以减小瞬时电压跌落幅值并使之快速恢复。文中分析了突加阻感性负载无功电流和发电机输出端电压的瞬态特性，指出补偿暂态无功电流分量会加重端电压的暂态不平衡，提出了暂态过程只补偿稳态无功电流分量的补偿策略，并采用改进的无功电流检测算法以及滑动均值滤波器提高了检测无功电流稳态分量的快速性。实验结果验证了补偿策略的有效性。“,”When a resistive-inductive load was suddenly connected to the stand-alone brushless doubly-fed generation system, the transient voltage sag of stator power windings may be too heavy to satisfy the requirements of power quality, so the reactive load current was compensated through the load-side converter to reduce the transient voltage sag and to quicken the recovery process. This paper analyzed the transient characteristic of reactive load currents and generator terminal voltages when a resistive-inductive load was suddenly connected, and pointed out that the imbalance of generator terminal voltages would become heavier if the transient component of the reactive load currents was compensated, and proposed a strategy that only the steady component of reactive load currents was compensated in the transient process. The detection rapidity of the steady component of reactive currents was enhanced by using the improved reactive current detecting algorithm and moving average filters. The experimental results validate the proposed compensation strategy.