| Title |
Unified Controller for Solar Array Simulator |
| Authors |
Thusitha Wellawatta ; Young-Tae Seo ; Sung-Jin Choi |
| DOI |
10.6113/TKPE.2020.25.2.118 |
| Keywords |
Solar array simulator; Unified controller; Feedback control |
| Abstract |
A solar array simulator is a special power supply that regulates the output voltage and current to simulate the characteristics of a photovoltaic panel. The operating point of the panel is difficult to control with a single controller because of the non-linearity of the output curve, which is determined by the amount of irradiation, temperature, and panel material. In the conventional method, the output curve is divided into sections through the current and the voltage mode controls. It reduces the overall performance of the system due to the interchanging control mode. By using the single mode controller, the noise interference of the measured value and the stability of the control around the maximum power point were demonstrated. To solve these issues, this study proposes a new unified controller. The stability of the controller was analyzed along with operating principles, and performance improvement was experimentally verified. |