Abstract
The electromechanical-electromagnetism hybrid simulation technology combines the advantages of electromechanical transient simulation and electromagnetic transient simulation. It can coordinate the simulation scale, precision and speed and provide new ideas and ways to study the stability and dynamic of large-scale power system characteristics. Aiming at the shortcomings of the existing hybrid simulation method, this paper presents a method of mechanical-electromechanical transient hybrid simulation based on socket technology. First of all, using the PSCAD with the component graphics library to build flexible AC transmission system (FACTS) components, its controller circuit, and its precise electromagnetic transient simulation; using the PSAT toolbox of MATLAB to build a conventional AC network for its mechanical and electrical transient simulation. Secondly, the hybrid simulation interface algorithm is improved. The hybrid simulation method simplifies the interface design, which can be flexible and efficient to carry out mechanical and electrical transient - electromagnetic transient hybrid simulation, and has a high degree of scalability. Finally, a three- machine nine-node system with SVC is used to simulate the electromechanical transient-electromagnetic transient simulation algorithm of power system based on socket technology. By comparing and simulating the three-machine 9-node system, the simulation results show that the proposed method can accurately simulate the FACTS-based simulation method, and the simulation results show that the proposed method can accurately simulate the FACTS Physical and dynamic characteristics of fast transient processes after disturbing AC systems.
