Browse > Article
http://dx.doi.org/10.6113/TKPE.2016.21.4.302

A PCS Control Strategy for Hybrid ESS with Function of Emergency Power Supply  

Kim, Sang-Jin (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology)
Kwon, Min-Ho (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology)
Choi, Se-Wan (Dept. of Electrical & Information Eng., Seoul Nat'l Univ. of Science and Technology)
Paik, Seok-Min (Dept. Technology Research Institute KUKJE Electric Mfg. co., Ltd.)
Kim, Mi-Sung (Dept. EMC Research Institute Energy Industry Team, Korea Testing & Research Institute)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.21, no.4, 2016 , pp. 302-311 More about this Journal
Abstract
This paper proposes a hybrid ESS that integrates an energy storage system (ESS) with an uninterruptible power supply (UPS). The hybrid ESS has a demand management and emergency power supply function while increasing the battery utilization of the UPS, which has just been used in a power failure. In addition to the critical load, the proposed system augments the capacity of emergency generation using an additional load, which has voltage and frequency-dependent characteristics to the grid side. The control algorithm of the AC-DC converter and bidirectional DC-DC converter is proposed for demand management and emergency power supply. Furthermore, seamless and autonomous transfer methods to alleviate the transient during mode transfer are proposed. To validate the proposed control scheme, experimental results from a 5 kW prototype are provided.
Keywords
Hybrid ESS; ESS(Energy Storage System); UPS(Uninterruptible Power Supply); Seamless transfer;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 S. Choi, J. Park, and M. Kwon, "System for controlling bidirectional converter," Korean Patent 10-1417669, July 2. 2014.
2 C. Bohn and D. P. Atherton, "An analysis package comparing PID anti-windup strategies," IEEE Control Syst. Mag., Vol. 15, No. 2, pp. 34-40, Apr. 1995.   DOI
3 M. Ryan and D. Lorenz, "A synchronous-frame controller for a single-phase sine wave inverter," Conf. Rec. IEEE-APEC Ann. Meeting, pp. 813-819, 1997.
4 C. Zou, B. Liu, S. Duan, and R. Li, "Stationary frame equivalent model of proportional-integral controller in dq synchronous frame," IEEE Trans. Power Electron., Vol. 29, No. 9, pp. 4461-4465, Sep. 2014.   DOI
5 H. Kim, T. Yu, and S. Choi, "Indirect current control algorithm for utility interactive inverters in distributed generation systems," IEEE Trans. Power Electron., Vol. 23, No. 3, pp. 1342-1347, May 2008.   DOI
6 J. Kwon, S. Yoon, and S. Choi, "Indirect current control for seamless transfer of three-phase utility interactive inverters," IEEE Trans. Power Electron., Vol. 27, No. 2, pp. 773-781, Feb. 2012.
7 S. Choi and S. Yoon, "Utility interactive inverter of three phase-indirect current control type and control method," Korean Patent 10-1178393, Aug. 24. 2012.
8 A new International UPS Classification by IEC 62040-3, IEC 62040-3, 2011.
9 J. Ji, "Test on characteristics of delta conversion UPS system," Journal of the Korea Academia-Industrial Cooperation Society, Vol. 6, No. 6, pp. 491-496, Dec. 2005.
10 S. Shin, J. Ahn, and B. Lee, "Maximum efficiency operation of three-level T-type inverter for low-voltage and low-power home appliances," Journal of the Electrical Engineering & Technology, Vol. 10, No. 2, pp. 586-594, Mar. 2015.   DOI
11 H. Shin, J. Park, and J. Choi, "Loss analysis by switching state of 3 level NPC and T-type inverter," Electrical Machinery & Energy Conversion Systems Society Annual Spring Conference, pp. 293-296, Apr. 2014.
12 M. Schweizer and J. Kolar, "High efficiency drive system with 3-level T-type inverter," in Proc. 14th EPE Conf. Appl., pp. 1-10, Aug./Sep. 2011.
13 M. Kwon, J. Park, and S. Choi, "A seamless transfer method of bidirectional DC-DC converter for ESS in DC micro-grids," The Transactions of the Korean Institute of Power Electronics, Vol. 19, No. 2, pp. 194 -200, Apr 2014.   DOI