Advanced SearchSearch Tips
A Cost-Effective, Single-Phase Line-Interactive UPS System that Eliminates Inrush Current Phenomenon for Transformer-Coupled Loads
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Cost-Effective, Single-Phase Line-Interactive UPS System that Eliminates Inrush Current Phenomenon for Transformer-Coupled Loads
Bukhari, Syed Sabir Hussain; Atiq, Shahid; Lipo, Thomas A.; Kwon, Byung-il;
  PDF(new window)
Sudden voltage drops and outages frequently disturb the operation of sensitive loads for domestic, commercial, and industrial use. In some cases, these events may even impair the functioning of relevant equipment. To maintain power under such conditions, a UPS system is usually installed. Once a disturbance happens at the grid side, the line-interactive UPS system takes over the load to prevent an interruption. But, due to magnetic saturation of the transformer, a significant inrush current may occur for the transformer-coupled loads during this transition. The generation of such transient currents may in turn decrease the line voltage and activates over-current protecting devices of the system. In this work, a cost-effective, line-interactive UPS system is proposed that eliminates the inrush current phenomenon associated with transformer-coupled loads. The strategy was implemented by connecting a standard current-regulated voltage source inverter (CRVSI) to the secondary winding of the load transformer. During any transient condition at the grid side, the load current is monitored and regulated to achieve either seamless compensation of the load current or complete transferal of load from grid to the inverter. Experimental results were obtained for a prototype under all possible operating conditions so as to validate the performance of the proposed topology.
UPS systems;Single-phase line-interactive;Inrush current elimination;
 Cited by
An Online UPS System That Eliminates the Inrush Current Phenomenon While Feeding Multiple Load Transformers, IEEE Transactions on Industry Applications, 2017, 53, 2, 1149  crossref(new windwow)
A Sag Compensator That Eliminates the Possibility of Inrush Current While Powering Transformer-Coupled Loads, IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017, 5, 2, 891  crossref(new windwow)
Yu-Hsing Chen and Po-Tai Cheng, "An inrush current mitigation technique for the line-interactive uninterruptible power supply systems," IEEE Trans. on Industrial Applications, vol. 46, no. 4, July/August 2010.

Bong-Hwan Kwon; Jin-Ha Choi; Tae-Won Kim, "Improved single-phase line-interactive UPS," IEEE Transactions on Industrial Electronics, vol.48, no.4, pp.804,811, Aug 2001. crossref(new window)

Bukhari, S.S.H.; Lipo, T.A; Byung-il Kwon, "An inrush current reduction technique for the line-interactive uninterruptible power supply systems," 39th Annual Conference of the IEEE Industrial Electronics Society, vol., no., pp. 430, 434, 10-13 Nov. 2013.

Yeh, C.-C.; Manjrekar, M.D., "A Reconfigurable Uninterruptible Power Supply System for Multiple Power Quality Applications," IEEE Transactions on Power Electronics, vol. 22, no. 4, pp. 1361-1372, July 2007. crossref(new window)

Wu, J. C.; Jou, H. L., "A new UPS scheme provides harmonic suppression and input power factor correction," IEEE Transactions on Industrial Electronics., vol. 42, no. 6, pp. 629-635, December 1995. crossref(new window)

Martinez, S.; Castro, M.; Antoranz, R.; Aldana, F., "Off-line uninterruptible power supply with zero transfer time using integrated magnetics," IEEE Transactions on Power Electronics, vol. 36, no. 3, pp. 441-445, August 1989.

Mokhtari, H.; Iravani, M.R.; Dewan, S.B., "Transient behavior of load transformer during sub-cycle bus transfer," IEEE Transactions on Power Electronics, vol. 18, no. 4, pp. 1342-1349, October 2003. crossref(new window)

Li, Y.; Vilathgamuwa, D. M.; Loh, P. C., "Microgrid power quality enhancement using a three-phase four-wire grid-interfacing compensator," IEEE Transactions on Industry Applications., vol. 41, no. 6, pp. 1707-1719, November/December 2005. crossref(new window)

Lee, W.-C.; Lee, T.-K.; Hyun, D.-S., "A three-phase parallel active power filter operating with PCC voltage compensation with consideration for an unbalanced load," IEEE Transactions on Power Electronics, vol. 17, no. 5, pp. 807-814, September 2002. crossref(new window)

Kong, W.Y.; Holmes, D.G.; McGrath, B.P., "Improved Stationary Frame AC Current Regulation using Feedforward Compensation of the Load EMF," 24th Annual IEEE Applied Power Electronics Conference and Exposition (APEC), vol., no., pp. 145-151, 15-19 Feburary 2009.

Holmes, D.G.; Lipo, T.A.; McGrath, B.P.; Kong, W.Y., "Optimized Design of Stationary Frame Three Phase AC Current Regulators," IEEE Transactions on Power Electronics, vol. 24, no. 11, pp. 2417, 2426, Nov. 2009. crossref(new window)