| Title |
Transient Response Characteristics Analysis of Distributed Generation based on Virtual Inertia |
| Authors |
유형준(Hyeong-Jun Yoo) ; 김경훈(Gyeong-Hun Kim) ; 전진홍(JinHong Jeon) |
| DOI |
https://doi.org/10.5370/KIEE.2020.69.5.664 |
| Keywords |
Microgrid; distributed generations(DGs); virtual inertia |
| Abstract |
The distributed generations(DGs) such as wind turbine, photovoltaic(PV), fuel cells, and energy storage system(ESS) are normally connected through power conversion system interface to power system. The high penetration of DGs will bring significant challenges to the power system. The power conversion systems have no rotating inertia or damping mechanism, thus the inertia and damping can’t be provided to power system, which makes the power system have a low inertia, and weakness the frequency stability and regulation capability. In addition, there is a constant voltage constant frequency(CVCF) converter in microgrid. So, if a CVCF converter fails, the system can be shut down. In this paper, the virtual inertia was applied to the power conversion system of ESS and PV system for analyzing transient response characteristics when the disturbance occur in microgrids. Especially, when the microgrid operation mode was switched from the grid-connected mode to the islanded mode and CVCF converter fail, the transient response has been compared under with virtual inertia and without virtual inertia. The simulation results are presented using MATLAB/SIMULINK. |