Mitigation of Subsynchronous Interactions in Hybrid AC/DC Grid With Renewable Energy Using Faster-Than-Real-Time Dynamic Simulation

Transmission line capacity enhancement by series compensation is commonly used in power systems, which consequently faces potential subsynchronous interaction (SSI). In this work, faster-than-real-time (FTRT) simulation based on the field-programmable gate arrays proposed to mitigate disastrous SSI a hybrid AC/DC grid integrated with wind farms. Dynamic applied AC system gain high speedup over real-time, and detailed multi-mass model specifically introduced synchronous generator show electrical-mechanical interaction. Meanwhile, DC undergoes electromagnetic transient reflect impact of converters' control overall grid, consequently, EMT-dynamic co-simulation running concurrently due FPGA's hardware parallelism formed. As two simulations are inherently distinct, power-voltage interface adopted separate them enables their coexistence one program. It shows that following detection contingency, FTRT platform can generate an optimum solution precisely quantified flow changes advance keep stable. The efficacy proven number cases where accuracy validated offline tool Matlab/Simulink.