Abstract:
The new power system has shown new characteristics in frequency control mode, control methods, and pricing mechanisms. Construction of the new power system requires collaborative efforts on the primary, secondary, tertiary, and quaternary systems. The quaternary system is a collaborative and open platform for all elements built on the strong and reliable physical power grid primary system, sensitive and accurate relay protection secondary system, and intelligent and flexible dispatch automation tertiary system. The quaternary system takes the real-time measurement center and intelligent decision center as the core, with the digital twin power grid as the technical foundation, to build a new ecosystem of organic integration, collaborative regulation, and open and win-win situation between the power system and social elements. Lishui Power Supply Company has conducted preliminary practices of the quaternary system, achieving certain results in areas such as one map of power system, water solar collaborative low-carbon balance, and intelligent control operation of virtual units. Β© 2023 IEEE.
