研究目的
To present a low-cost PV emulation test-bed for teaching, research, and development when actual PV panels cannot be used, utilizing the real-time digital controller platform 'Workbench'.
研究成果
A simple to use real-time platform ('Workbench') was introduced for developing a low-cost PV emulator. The intuitive drag and drop based design of the software allows for fast simulation and real-time testing. Experimental results for both single as well as multiple modules were demonstrated, along with the effect of partial shading on one of the module. The controller boasts a rapid prototyping ability, equipped with data acquisition.
研究不足
The use of bypass diode can be considered inherent to the partial shading experiment. Without a bypass diode, a hot-spot develops, which cannot be emulated electrically with the present setup, so this is ignored.
1：Experimental Design and Method Selection:
The emulator uses a DSP-based hardware with a graphical interface for real-time, closed-loop control for PV emulation. The power stage uses an on-board MOSFET/diode, external capacitor and inductor as a DC/DC converter powered by a bench-top DC power supply.
2：Sample Selection and Data Sources:
The model is simulated using Workbench, with parameters of the PV model used in simulation listed in a table.
3：List of Experimental Equipment and Materials:
Includes a DSP (TMS320F28335 Del?no DSP), DC bench power supply, buck converter, and Allegro (ACS722) current sensors.
4：Experimental Procedures and Operational Workflow:
The model design interface is intuitive and drag and drop based. The model previously used for simulation can be used for real-time hardware deployment with minimal changes.
5：Data Analysis Methods:
The operating points are plotted for varying load resistance for insolation and temperature change, whose characteristic curves are shown in figures.
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