Analysis of Transient Response Time for PV Source Simulators and a Design of PV Source Simulator Test Platform

A photovoltaic (PV) source simulator is an essential tool for researching maximum power point tracking (MPPT) algorithms and control strategies in PV power systems. However, the transient response time of a PV source simulator will significantly impact the MPPT and control strategy of a PV power system. This paper conducts a theoretical analysis of the transient response time of a PV source simulator, aiming to provide the upper limit of the frequency for PV MPPT. To verify the analysis, the ITECH IT6018C-l500-40 model is selected as the PV source simulator, and a hardware prototype of a PV source simulator test platform is built. Through the quantitative analysis of the influence of the transient response time on PV MPPT by setting different MPPT frequencies, this study demonstrates that the transient response time of the PV source simulator has a significant impact on the performance of PV MPPT. Finally, based on the experimental results, the accuracy of voltage and current acquisition, and the efficiency of the PV power system, this study proposes a recommended frequency of 20 Hz for PV MPPT.