| Title |
Development of Three-Phase Line-Interactive Dynamic Voltage Restorer with Hybrid Detection Method |
| Authors |
정종규(Jeong, Jong-Kyou) ; 한병문(Han, Byung-Moon) |
| Keywords |
Voltage sag ; Interruption ; Line-Interactive ; DVR(Dynamic Voltage Compensator) ; RMS variation detector ; DFT(Discrete Fourier Transform) |
| Abstract |
This paper describes the development of a three-phase line-interactive dynamic voltage restorer with hybrid detection method, which is composed of three H-bridge inverter modules and super-capacitors. The operational feasibility was verified through computer simulations with PSCAD/EMTDC software, and experimental works with a 3kVA prototype. The developed system can compensate the input voltage sag and interruption within 2ms. The maximum allowable duration of voltage interruption is about 4 seconds. The developed system can be effectively used to compensate the voltage interruption in the sensitive load, such as computer, communication devices, and automation devices, and medical equipment. The developed system has a simple structure to be easily implemented with commercially available components, and to be highly reliable in operation. |