System design for Nanjing HVDC flexible transmission project

Abstract

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.

Keywords

• HVDC power convertors
• HVDC power transmission
• power transmission control
• real bipolar connection
• converter stations
• system design scheme
• main connection mode
• operation mode
• parameters design
• HVDC flexible technology
• Nanjing HVDC flexible transmission project
• Nanjing city
• high-voltage direct current flexible transmission project
• transmission capacity
• power supply shortage problem
• control strategy
• power operation range
• power 1500 MW