Research on application of FDNE based on RTDS and comparison analysis of fault transient of Shanghai Sijing power grid

Abstract

As a most widely applied real-time digital simulation system, real time digital simulation (RTDS) is however quite limited on scale of simulation by the number of hardware purchased. Through frequency-dependent network equivalent (FDNE), scale of simulation of RTDS could be largely increased by frequency equivalent on limited hardware. Based on basic principles of FDNE, function limitations and problem are analysed, taking the Shanghai Sijing district power grid as an example; detailed simulation model and FDNE equivalent module are built, transient characteristics under faults before and after FDNE equivalent are analysed. Furthermore, the fault characteristics of high-voltage direct current (HVDC)-Sijing power grid is also studied, which provides a realistic means for real-time digital simulation of AC–HVDC hybrid power grid with limited hardware of RTDS.

Keywords

• power system transients
• poles and towers
• power transmission lines
• HVDC power transmission
• power grids
• power system simulation
• HVDC power convertors
• hybrid power systems
• digital simulation
• RTDS
• fault transient
• Shanghai Sijing power grid
• real-time digital simulation system
• frequency-dependent network equivalent
• frequency equivalent
• function limitations
• Shanghai Sijing district power grid
• detailed simulation model
• FDNE equivalent module
• transient characteristics
• fault characteristics
• high-voltage direct current-Sijing power grid
• AC–HVDC hybrid power grid