To mitigate power transmission losses between power plants and consumers, Medium-Voltage Direct Current (MVDC) systems, which transmit power as DC and convert it back to AC at the destination, are increasingly being developed. However, these MVDC conversion systems, which are rich in semiconductor devices, generate significantly more heat than conventional transformers. Consequently, the thermal management capabilities of traditional air-cooling methods are proving insufficient, necessitating the adoption of liquid cooling systems. This study aims to optimize the energy efficiency of MVDC liquid cooling systems. Finally, we demonstrated a optimized system that minimizes the pump's power consumption by dynamically adjusting the coolant flow rate to each thermal module based on the automatic control valve system.

Abstract
1. 서 론
2. 연구방법
    2.1 실험장치 구성
    2.2 밸브의 자동제어
    2.3 실험 Method 및 Heat balance test
3. 결 과
    3.1 자동제어밸브 미작동시 유량분배 및 온도분포
    3.2 자동제어밸브 작동시 유량분배 및 온도 분포
    3.3 수동 및 자동제어모드의 비교
4. 결 론
References

• 이도훈(Graduate school of Mechanical-Aerospace-Electric Convergence Eng., Jeonbuk National University) | Dohoon Lee
• 이동휘(Graduate school of Mechanical-Aerospace-Electric Convergence Eng., Jeonbuk National University, Dept. of Mechanical System Eng., Jeonbuk National University) | Donghwi Lee Corresponding author
• 문정민(AMITEK CO.LTD) | Jeong Min Moon