¿¿1100kV UHVDC computational parameters modeling and effect on receiving-end grid

摘要

The ¿¿1100kV Ultra High Voltage DC (UHVDC) is characterized by large capacity, long transmission distance and low losses. It is an effective solution to long-distance and high-capacity transmission, implement of ¿¿¿Power Delivery from West to East¿¿¿ and relief from the Eastern air pollution in China. Due to the high voltage, large transmission capacity and hierarchical connection mode of inverter stations, inevitably, the operation of ¿¿1100kV UHVDC will have a tremendous impact on power flow distribution and stability of the eastern receiving-end grid. In this paper, combined with the theoretical characteristics of UHVDC, the system parameters and control model of a ¿¿1100kV UHVDC is designed. Meanwhile, the DC steady stability, monopolar trip, bipolar trip and the effects on DC when AC system faults are simulated and analyzed in detail by PSD-BPA. The corresponding stability control strategy is identified, which provides information for construction of ¿¿1100kV UHVDC and hybrid operation of UHV AC and DC in the future.