A General Interface-Free Delayed Real-Time Simulation Method with A-Stability for Power Electronic Converters

The complex topologies, numerous nonlinear switching devices and the high-frequency characteristics inherent in power electronic converters cause significant challenges in real-time simulation. In this letter, a general interface-free delayed real-time simulation method with A-stability is proposed. The introduction of a half-step explicit analytical solution to correct the values of the controlled sources at the interface enables the overcoming of the limitation of the large computational burden of the traditional analytical solution. Furthermore, it realizes the parallel solution and constant-admittance of the converters, which has both A-stability and no interface time-delay compared with existing techniques. The efficacy of the proposed method is validated by constructing a physical prototype and the execution of hardware-in-loop (HIL) simulation in OP4610 across a range of scenarios.