Abstract
This paper deals with an emulation system for Power Electronics Converters (PEC). The emulation of PECs is performed on a Field-Programmable Gate Array (FPGA) capable of hard real-time operation. To obtain such a system, the converter operation is described using a differential equations-based model designed with the graph theory. Differential equation coefficients are changed according to the type of converter and pulse-width modulation (PWM) signals. The tie-set and incidence matrix approach for the converter modelling is performed to describe the converter operation in a general way. Such approach enables that any type of PECs can be described appropriately. The emulator was verified experimentally by synchronous operation with a real DC-AC converter built for this purposes.
Highlights
In recent years, demand for utilization of power electronic converters in industrial, commercial and household applications has increased significantly
For verification of the described modelling based on the system in Equation (25), the experimental test-bench system was built, as shown in Figures 8 and 9
The frequency of 25 kHz for the pulse-width modulation (PWM) triangle carrier was chosen for both the Emulator and real DC-alternating power source (AC) converter
Summary
Demand for utilization of power electronic converters in industrial, commercial and household applications has increased significantly. Considering the time constraints on engineers, it is not surprising that rapid prototyping tools, different Hardware-in-the-Loop (HiL) systems and fault diagnosis techniques have become the key issue in Power Electronics System (PES) applications. For these applications, the modelling techniques process enables faster developing of the PESs. Off-line simulation using different tools is used widely to predict the behaviour of PESs in a time domain. Some ideas of simulation are exploited to some extent for real-time application as estimators and observers in different control processes
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