| Title |
A Study on the Operation Method of Energy Harvesting Device in 20kW PV System |
| Authors |
전진택(Jin-Taek Jeon) ; 최성문(Sung-Moon Choi) ; 유현상(Hyun-Sang You) ; 노성은(Seong-Eun Rho) ; 이중선(Joong-Seon Lee) ; 노대석(Dae-Seok Rho) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.9.1528 |
| Keywords |
Energy Harvesting Device; Circuit Reconfiguration Device; Voltage Compensation Device; PV System; Operation Algorithm |
| Abstract |
Recently, renewable energy sources have been continuously installed by the 2050 Carbon Neutral and the Green New Deal policy in Korea, and the capacity of PV systems has been rapidly increased due to low costs and short construction periods. However, it is reported that the output of PV systems varies significantly depending on the weather and surrounding conditions and the operation efficiency is reduced because of the shading in some PV modules. Therefore, this paper presents an operation algorithm of energy harvesting device for PV modules to improve operation efficiency by preventing the shutdown of grid-connected inverter due to the partial shading in the PV string. In addition, this paper performs a modeling of energy harvesting device, which is composed of circuit reconfiguration device section, voltage compensation device section, monitoring and control device section, etc, using PSCAD/EMTDC, and also implements 20[kW] energy harvesting device based on the modeling. From the simulation and test results for the proposed energy harvesting device, it is confirmed that the device can prevent the shutdown of grid-connected inverter by re-combining the PV string with the circuit reconfiguration and voltage compensation devices depending on the shading conditions. And also, it is found that the proposed energy harvesting device for PV modules is useful tool to improve the operation efficiency of PV system, because the operation characteristics of PSCAD/EMTDC modeling is nearly equivalent with one of the device. |