Photovoltaic emulator based on PV simulator RT implementation using XSG tools for an FPGA control: Theory and experimentation

Abstract

Summary This paper presents an efficient field‐programmable gate array (FPGA) implementation method for a photovoltaic (PV) simulator based on two‐diode model applied to control a PV emulator. The hardware set up allows to repeat the real PV system behavior in the laboratory regardless of external climatic conditions change. The proposed approach has been designed through Xilinx System Generator (XSG) tools and MATLAB/Simulink environment and verified across cosimulation method. A real‐time test bench is built based on the implemented PV simulator with a closed loop control using proportional integral (PI) regulator, a direct current/direct current (DC/DC) buck converter and a resistive load. Experimental results are in agreement compared with simulation ones and prove the high accuracy and efficiency of the proposed implementation method for allowing a good emulation of PV characteristics. From some experiments, the development of PV emulator constitutes an important challenge task in the PV energy field.

Simple and fast computation photovoltaic emulator using shift controller

“…The computation time for the simulation is low (<1 μs), which allows the controllers to operate properly and accurately. If these results are compared with the other simulated PVE, the error is significantly lower [13, 36]. This is because the PVEPI, PVEF, and PVES use the resistance feedback control strategy, which is more accurate and stable than the conventional DRM [1].…”

Symmetrical Pole Placement Method-Based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller With Harmonic Compensator for Single Phase Grid-Connected PV Inverters

“…At this point, photovoltaic emulators (PVE) have become the essential part of the PV applications in terms of [48]. The working principle of the PVE is based on generating the explicit dynamics of the I-V and P-V characteristics curves of the real PV panel at issue [14], [49]. It is worth noting that whilst the objective PVE delivers a good performance by itself, it may exhibit undesirable behaviors as a result of interfacing with some switch mode power supplies that constitute the indispensable of the PV power generation and delivering systems or it may not reflect the same PV characteristics through the variance of the irradiance and the temperature [50], [51], [52].…”

“…Achieving of this objective presents some considerable challenges in practice. Evaluating the performance of the single-phase GCI controller systems that is supplied with PV array DC under varying environmental conditions with the use of real PV panels in series or parallel according to the needs is practically impossible due to the lack of control over the irradiance and temperature and the requirement of large area, hence the use of PVEs has become compulsory [13], [14], [15]. A wide range of research papers have discussed the various controllers thoroughly by using conventional or advanced design techniques for the singlephase GCI systems [16], [17], [18], [19], [20], [21], [22].…”

Design and Implementation of a Simple and Efficient Control Strategy for PVEs

“…Various digital approaches were presented in the literature [7][8][9][10]. In [7], the authors used a DSP board to control a buck converter.…”