Real-time (RT) hardware-in-the-loop (HIL) simulation aims to speed up the validation process for power electronic systems (PES). The complex PESs with high switching frequency constitute some of the most challenging a...
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Real-time (RT) hardware-in-the-loop (HIL) simulation aims to speed up the validation process for power electronic systems (PES). The complex PESs with high switching frequency constitute some of the most challenging applications in RT-HIL. Conventional RT-HIL relies on adding extra expensive computing hardware to achieve submicrosecond step size, reducing errors caused by unavoidable sampling delays. This article proposes a CPU-based event-driven RT (EDRT) simulation framework by improving the algorithm rather than using additional hardware. The framework consists of two parts: 1) the synchronous-cycle event detection sampling method, which eliminates the delay error by detecting switching events;and 2) the discrete hybrid time-step numerical algorithm, which combines variable and fixed step-size simulation to improve the calculation efficiency and uses the ideal model to improve the modeling accuracy. The proposed framework is applied to a power electronic transformer with 24 switches and a 20 kHz switching frequency as a simulated case. Comparing the proposed simulation results with experimental results and other simulation results, the proposed EDRT framework can achieve the same numerical accuracy as the offline simulation but only requires 1/36 of the computation time. Furthermore, the hardware cost to achieve the same computational scale is reduced to 1/20 of the conventional HIL.
Real-time simulation of powerelectronics has been recognized by the industry as an effective tool for developing power electronic devices and *** there is no energy transfer during the course of the usage,real-time s...
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Real-time simulation of powerelectronics has been recognized by the industry as an effective tool for developing power electronic devices and *** there is no energy transfer during the course of the usage,real-time simulation has a lot of advantages in the process of development and *** the perspective of real-time simulation,this paper focuses on the main problems in modeling accuracy,system bandwidth and stability,limitations on communication interface and energy interface,and the cost of platform ***,we provide further research directions.
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