Multi-rate Real Time Simulation of Power System with Combined Heating and Power

The real-time simulation of the power system with integrated energy of combined heat and power faces the contradiction between simulation scale and simulation step length. After analyzing the model of the key links in the system, this paper divides the system into three subsystems: power system, gas turbine system, and heating system according to different time scales. The coupling is decoupled by asynchronous data interaction, and different simulation steps are used to simulate the subsystems. When solving the power system, two multi-rate methods based on explicit and implicit hybrid integration and Norton equivalent are used. In order to ensure the real-time performance of the simulation, for the large-step sub-network with a large amount of calculation in the Norton equivalent method, a calculation method which solves the large step sub-network before the small-step sub-network is given. Finally, on the real-time simulation platform (FRTDS), the power system with integrated energy of combined heat and power is divided into different subsystems, and simulated at four rates. The simulation results are compared with the single-rate simulation, which verifies the feasibility of the multi-rate real-time simulation scheme.