| Title |
Study on the Stability of Power Supply in Power Systems with Intermittent Renewable Energy Using VFT |
| Authors |
Jae-Deok Park ; Tae-Hun Kim ; Byeong-Hyeon An ; Jun-Soo Che ; Tae-Sik Park |
| DOI |
http://doi.org/10.5207/JIEIE.2024.38.1.067 |
| Keywords |
Intermittent; Partition; Variable frequency transformer (VFT); Voltage sensitivity |
| Abstract |
The global response to the climate crisis has led to the implementation of various policies worldwide, with a domestic focus on increasing the share of renewable energy sources such as wind and solar power. However, the rapid expansion of renewable energy sources may induce power supply instability due to their intermittent nature. In this paper, we propose the application of Variable Frequency Transformers (VFT) to address the instability in power supply systems. VFTs are bidirectional power devices capable of connecting asynchronous power systems. To determine optimal installation locations for VFTs, the power system is partitioned based on voltage sensitivity. VFTs are then strategically placed between the partitioned power system regions, and an analysis of the safety of power supply across transmission lines, considering the intermittent generation patterns of renewable energy, is conducted to identify the most suitable installation points. The proposed approach is validated using the IEEE 39 bus system, and simulations in MATLAB demonstrate the enhanced power supply stability and the impact of VFT application. |