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Solar Array Simulator (SAS) Development

This research presents an advanced Solar Array Simulator (SAS) designed to accurately emulate the current-voltage (I-V) characteristics of real photovoltaic (PV) arrays under various conditions, including shading and temperature changes. To ensure seamless operation with maximum power point tracking (MPPT) converters, the SAS features a fast transient response enabled by an isolated interleaved converter that produces a multilevel voltage, reducing filter size and improving performance.

A novel control algorithm dynamically switches between voltage and current modes to precisely replicate all regions of the PV I-V curve. Experimental results demonstrate that the SAS can emulate PV arrays up to 600 V and 10 A, maintaining accuracy even under partial shading and rapid changes.

Schematic of the proposed SAS power conversion system.
Prototype of the Solar Array simulator (SAS). (A) Reference-Generation Unit (RGU), (B) High-frequency transformers, (C) Output inductor, (D) Microcontroller and interface board, (E) Full-bridge converters with output rectifiers and capacitors, (F–G) Power supplies, (H) Three-phase input rectifier, (I) DC-link input stage.

Fully Assembled Prototype

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