摘要 : In order to solve the problem of power supply shortage in certain region of Nanjing city, a high-voltage direct current (HVDC) flexible transmission project needs to be constructed. It could be the first project with ±380 kV DC a... 展开 In order to solve the problem of power supply shortage in certain region of Nanjing city, a high-voltage direct current (HVDC) flexible transmission project needs to be constructed. It could be the first project with ±380 kV DC and real bipolar connection in the world. Two new converter stations will be built with 1500 MW transmission capacity. The system design scheme has been proposed including the main connection mode of converter stations, the operation mode, the control strategy, parameters design for main circuit and determination of converter station's power operation range. This technical solution can provide complete design method for future HVDC flexible transmission project, which is of great significance to the development and engineering application of the HVDC flexible technology in China. 收起