A Novel Design of UPS with Useful Customer Load Management Function

  • Jae-Hun Ko
  • Tae-Seong Choi
  • Je-Chang Ryu
  • Hong-Won Lee
  • Jung-Hun Lee
  • Hong-Moon Chae
  • Seung-Gyu Jeon
  • Jae-Eon KimEmail author
Original Article


Traditional Uninterruptible Power Supplies (UPS) only provide stable power to critical loads in emergency situations, while Energy Storage Systems (ESS) perform functions such as generator output stabilization, frequency control, peak shaving, and load leveling. As the global ESS market expands, various ESS supply policies are being implemented in a number of countries. Accordingly, research and development of a hybrid UPS-ESS system combining the advantages of UPS and ESS are underway in order to ensure critical load stability in case of emergency. For such a situation, we propose the development of a system with a customer load management function by simply adding a converter and battery pack to a widely used conventional UPS. The proposed system in this paper is more economical than a hybrid UPS-ESS system or an ESS. In addition, the proposed system performs peak-clipping and load-shifting according to time-based rates, and has a longer power outage time in case of emergency without needing to communicate with the existing UPS.


Energy storage system Uninterruptible power supply Hybrid UPS-ESS system Customer load management 



This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20181210301470, Development and Proof on the Commercialization of the Broker Service based on Small-scale Distributed Energy Resources).


  1. 1.
    Guerrero JM, De Vicuna LG, Uceda J (2007) Uninterruptible power supply systems provide protection. IEEE Ind Electron Mag 1:28–38CrossRefGoogle Scholar
  2. 2.
    Niroomand M, Karshenas H (2010) Review and compare-son of control methods for uninterruptible power supplies. In: IEEE power electronic and drive systems and technologies conference (PEDSTC), pp 18–23Google Scholar
  3. 3.
    Racine MS, Parham JD, Rashid MH (2005) An overview of uninterruptible power supplies. In: Proceedings of the 37th Annual North American power symposium, pp 159–164Google Scholar
  4. 4.
    Karve S (2000) Three of kind [UPS topologies, IEC stand-ard]. IEE Rev 46(2):27–31CrossRefGoogle Scholar
  5. 5.
    Boutin LJ (1973) Uninterruptible power supplies in the textile industry. IEEE Trans Ind Appl IA-9(2):127–132CrossRefGoogle Scholar
  6. 6.
    Choi Jin-Ha, Kwon Jung-Min, Jung Jee-Hoon, Kwon Bong-Hwan (2005) High-performance online UPS using three-leg-type converter. IEEE Trans Ind Electron 52(3):889–897CrossRefGoogle Scholar
  7. 7.
    Yeh CC, Manjrekar MD (2007) A reconfigurable un-interruptible power supply system for multiple power quality applications. IEEE Trans Power Electron 22(4):1361–1372CrossRefGoogle Scholar
  8. 8.
    Jain PK, Espinoza JR, Jin H (1998) “Performance of a single-stage UPS system for single-phase trapezoidal-shaped AC-voltage supplies”. IEEE Trans Power Electron 13(5):912–923CrossRefGoogle Scholar
  9. 9.
    Park Jae-Kyu, Kwon Jung-Min, Kim Eung-Ho, Kwon Bong-Hwan (2008) High-performance transformerless on-line UPS. IEEE Trans Ind Electron 55(8):2943–2953CrossRefGoogle Scholar
  10. 10.
    Vazquez Nimrod, Villegas-Saucillo JesÚs, Hernandez Claudia, Rodriguez Elias, Arau Jaime (2008) Two-stage uninterruptible power supply with high power factor. IEEE Trans Ind Electron 55(8):2954–2962CrossRefGoogle Scholar
  11. 11.
    D Dong, L Chen, H Li, M Chen, D Xu (2015) Design of hybrid ac-dc-ac topology for uninterruptible power supply. 2015 IEEE 2nd International future energy electronics conference, pp 1–5Google Scholar
  12. 12.
    Martinez S, Castro M, Antoranz R, Aldana F (1989) Off-line uninterruptible power supply with zero transfer time using integrated magnetics. IEEE Trans Ind Electron 36(3):441–445CrossRefGoogle Scholar
  13. 13.
    Abusara M, Guerrero JM, Sharkh SM (2014) Line-interactive UPS for microgrids. IEEE Trans Ind Electron 61(3):1292–1300CrossRefGoogle Scholar
  14. 14.
    Tan X, Li Q, Wanga H (2013) Advances and trends of energy storage technology in microgrid. Int J Elect Power Energy Syst 44:179–191CrossRefGoogle Scholar
  15. 15.
    Nair CNK, Niraj G (2010) Battery energy storage systems: assessment for small-scale renewable energy integration. Energy Build 42(11):2124–2130CrossRefGoogle Scholar
  16. 16.
    Leadbetter J, Swan L (2012) Battery storage system for residential electricity peak demand shaving. Energy Build. 55:685–692CrossRefGoogle Scholar
  17. 17.
    Korea Energy Agency (2017) Survey on the promotion policies of ESS enlargement in major countries and suggestion of domestic introduction. Korea Energy Agency, YonginGoogle Scholar
  18. 18.
    Kim Sangjin, Kwon Minho, Choi Sewan (2018) Operation and control strategy of a new hybrid ESS-UPS system. IEEE Trans Power Electron 33(6):4746–4755CrossRefGoogle Scholar
  19. 19.
    Lim Seung-Beom, Hong Soon-Chan (2014) Hybrid UPS with energy storage system function. Trans Korean Inst Power Electron 19(3):266–275CrossRefGoogle Scholar
  20. 20.
    Yang J-H, Jeong K-I, Kwon J-M (2014) Energy storage system with PV generation and on-line UPS functions. In: 2014 IEEE 36th international telecommunications energy conference, pp 1–4Google Scholar
  21. 21.
    Jang S-K, Kim M-S, Hwon Y-H, Park G-S, Jang B-G (2016) Power management system of ESS within On-Line UPS Function. In: The Institute of electronics and information engineers, pp 1458–1460Google Scholar
  22. 22.
    Eom J-K (2015) Research of economical dispatch algorithm for ESS with UPS function. Sungkyunkwan University, SeoulGoogle Scholar

Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Jae-Hun Ko
    • 1
  • Tae-Seong Choi
    • 1
  • Je-Chang Ryu
    • 1
  • Hong-Won Lee
    • 1
  • Jung-Hun Lee
    • 1
  • Hong-Moon Chae
    • 1
  • Seung-Gyu Jeon
    • 1
  • Jae-Eon Kim
    • 1
    Email author
  1. 1.School of Electric EngineeringChungbuk National UniversityCheongjuSouth Korea

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