CAJ | 학술논문

建立了一个向无源系统供电的混合双端直流输电系统仿真模型，其整流器采用基于相控整流的常规换流器，逆变器采用交流侧带串联电容的电压源换流器，并为所建立的直流输电系统的整流器和逆变器设计了相应的控制策略，整流侧采用定直流电压控制，逆变侧采用定直流电压和定交流电压的控制。与传统的直流输电系统相比较，该混合直流输电系统可以直接向无源系统供电，无需增加外部换相电源或同步调相机。最后，对所建立的混合双端直流输电系统的特性进行了仿真分析，证实了所建立的混合双端直流输电系统模型的正确性和所提出控制方法的有效性，同时也表明这种输电系统具有许多不同于传统直流输电系统的优良运行特性。
건립료일개향무원계통공전적혼합쌍단직류수전계통방진모형，기정류기채용기우상공정류적상규환류기，역변기채용교류측대천련전용적전압원환류기，병위소건립적직류수전계통적정류기화역변기설계료상응적공제책략，정류측채용정직류전압공제，역변측채용정직류전압화정교류전압적공제。여전통적직류수전계통상비교，해혼합직류수전계통가이직접향무원계통공전，무수증가외부환상전원혹동보조상궤。최후，대소건립적혼합쌍단직류수전계통적특성진행료방진분석，증실료소건립적혼합쌍단직류수전계통모형적정학성화소제출공제방법적유효성，동시야표명저충수전계통구유허다불동우전통직류수전계통적우량운행특성。
A simulation model of a hybrid two-terminal HVDC transmission system providing power to passive system has been established in this paper,the recitifier of which adopts a phase-controlled rectifier based common current converter,and the inverter of which takes use of a voltage source converter with series capacitance in AC part. Corre-sponding control scheme has also been designed for the rectifier and inverter in the proposed AC transmission system, which adopts constant voltage( CV)control in rectifier and the constant DC voltage and constant AC voltage control in inverter. Compared with the traditional HVDC transmission system,such hybrid HVDC transmission system will be a-ble to achieve power supply to a passive load field without any external commutating phase power or synchronous phase modulator. The simulation results verify the correctness of the proposed hybrid two-terminal HVDC transmission sys-tem model as well as the effectiveness of the proposed control scheme. simultaneously,it is also proved that this kind of hybrid HVDC transmission system has some valuable operation performance,which is superior to the traditional HVDC transmission system.