Cross-Platform Electromagnetic Transient Real-Time Simulation Method of Large-Scale Power Grid

With the advancement of Ultra-High Voltage (UHV) AC/DC hybrid power grids, the interactions between DC terminals have become increasingly apparent. In order to precisely simulate these interactions among regional power grids, innovative simulation methods are urgently needed. Building upon the foundation of existing digital-analog hybrid simulation technology, this research addresses the challenge of accommodating large-scale access and the actual system control system of protective devices. It achieves realtime, extensive grid electromagnetic transient simulation across multi-platforms. This simulation not only captures HVDC control protection features but also leverages cross-platform supercomputing technology to enhance simulation scalability. By overcoming the limitations of electromagnetic transient simulation scale, it addresses the challenge of high-precision simulation for UHV AC/DC large-scale hybrid grids. This paper explores the decoupling method for large-scale power grid cross-platform simulation and proposes a unified simulation data transmission and synchronization scheme. Utilizing this method, realtime simulations of interconnected power grids in the northwest and east China regions are conducted, significantly enhancing the overall realtime capabilities of electromagnetic transient simulations. A comparative analysis with actual power grid fault simulation validates the accuracy of cross-platform joint simulations. This study provides an effective simulation approach for in-depth analysis of interactions between sending and receiving ends in cross-regional power grids.