A quasi-resonant soft switching 48-pulse PWM inverter with closed loop current control for the realization of FACTS devices

Ustun, T.S. and Mekhilef, Saad (2008) A quasi-resonant soft switching 48-pulse PWM inverter with closed loop current control for the realization of FACTS devices. In: 2008 Australasian Universities Power Engineering Conference, AUPEC 2008, Sydney, NSW.

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This paper discusses a 48-pulse Hbridge PWM inverter which utilizes a quasiresonant topology that is comprised of a clamping circuit and a resonant circuit, in order to achieve soft switching. The use of a multi-pulse inverter increases the quality of the output whereas the implementation of soft switching technique increases the overall efficiency of the inverter by decreasing switching losses that reach considerable values with the abundant number of switches and a switching frequency of the order of KHz. Furthermore, in order to be able to respond load variations a feedback loop is constructed with a PI controller to realize closed loop current control. The overall system is characterized by a multi-pulse inverter the input voltage of which is not a pure DC but a waveform that occasionally reaches zero level with the help of a quasiresonant circuit at the source side, and which can keep its current output at a predetermined level by varying the PWM gating signal's duty cycle with the help of a closed loop current control. This system is aimed to be a building block for FACTS devices such as Static Synchronous Series Compensator (SSSC). The motivation of designing a more efficient and dynamic inverter with high power quality is to construct more efficient and effective FACTS devices.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Conference code: 76326 Export Date: 16 November 2012 Source: Scopus Art. No.: 4812971 Language of Original Document: English Correspondence Address: Ustun, T. S.; Department of Electrical Engineering, University Malaya, Kuala Lumpur, Malaysia; email: tahaselim@yahoo.com References: Habur, K., Leary, D.O., FACTS for Cost Effective and Reliable Transmission of Electrical Energy (2005) Reactive Power Compensation, , Power Transmission and Distribution Group of Siemens; Asare, P., Diez, T., Galli, A., O'Neill-Carillo, E., Robertson, J., Zhao, R., An Overview of Flexible AC Transmission Systems (1994) ECE Technical Reports PURDUE University; Hingorani, N., Gyugyi, L., (1999) Understanding FACTS, Concepts and Technology of Flexible AC Transmission Systems, pp. 19-22. , IEEE Press; Smith Jr., K.M., Smedley, K.M., A Comparison Of Voltage-Mode Soft-Switching Methods for PWM Converters (1997) IEEE Trans. Power Electronics, 12 (2), pp. 376-386. , March; Divan, D.M., The resonant dc link converter-A new concept in static power conversion (1989) IEEE Trans. Ind. Applicat, 25 (2), pp. 317-325; Erinmez, I.A., Foss, A.M., (1998) Static synchronous compensator (STATCOM), , Cigre, Working Group 14.19, September; Haro, P.Z., Ramirez, J.M., (2005) Static Synchronous Series Compensator Operation Based on 48-pulse VSC, pp. 103-104. , IEEE press; Hui, S.Y.R., Analysis of a Quasi- Resonant Circuit for Soft-Switched Inverters (1996) IEEE Transactions of Power Electronics, 11 (1), pp. 106-114. , January; Kazmierkowski, M.P., Malesani, L., Current Control Techniques for Three-Phase Voltage-Source PWM Converters: A Survey (1998) IEEE Transactions on Industrial Electronics, 45 (5), pp. 691-703. , October; El-Moursi, M.S., Sharaf, A.M., Novel Controllers for the 48-Pulse VSC STATCOM and SSSC for Voltage Regulation and Reactive Power Compensation (2005) IEEE Transactions on Power Systems, 20 (4), pp. 1985-1997. , November
Uncontrolled Keywords: Current control, FACTS, Multi-pulse, PWM inverter, Quasi-resonant, Soft switching, Closed loop control systems, Counting circuits, Electric current control, Electric impedance, Power converters, Pulse modulation, Pulse width modulation, Resonant circuits, Zero voltage switching.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 18 Feb 2013 01:39
Last Modified: 25 Oct 2019 03:47
URI: http://eprints.um.edu.my/id/eprint/4870

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