【摘要】 在交直流混合输电系统中,可以利用直流系统的功率调制来提高交流系统的运行稳定性。文章在建立含有VSC-HVDC的交直流混合输电系统模型的基础上,提出了一种新的VSC-HVDC混合功率调制方法来提高发电机阻尼,该方法利用Bang-bang控制原理设计混合调制信号,并将其加入到常规的PI调节器中。仿真结果表明,加入混合调制信号可以增强系统的阻尼并有效地抑制振荡,能够改善系统在各种扰动下的动态性能。更多还原

【Abstract】 In AC/DC hybrid power system, DC power modulation is often used to improve the stability of AC power system. Here, a model of AC/DC hybrid power system including VSC-HVDC system is established; on this basis a new method of hybrid power modulation for VSC-HVDC system is proposed to enhance generator damping. In the proposed method the hybrid modulation signals are designed by using Bang-bang control theory and are added to conventional PI regulator. The simulation results show that, with the hybrid modulation signals, the system damping can be strengthened and oscillation can be restrained effectively, so the dynamic performance of AC/DC hybrid power system under different disturbances can be improved.更多还原