Autonomous Power Generating System with Multi-Level Converters

Paper presents a novel topology of autonomous power generating system with a diesel engine and a permanent magnet synchronous generator (DE/PMSG) in configuration with the multi-level converters. The star-connected three-phase back-to-back topology with a five-level diode-clamped rectifier (5LDCR) and a five-level diode-clamped inverter (5LDCI) supplies a three phase output load. The proposed multi-level current mode control technique represented in dq frame and subsequently converted to abc frame provide an effective solution to voltage imbalance problem in a DC link network. The proposed balancing method is applied to "back-to-back" operational mode only. In case of operation from the interfaced battery energy storage (BES), the balancing problem does not exist because individual DC-DC converters (SU/SD) stabilize voltages across four capacitors in the DC link network. Importantly, the gen-set is able to operate with an asymmetrical, a nonlinear and an impact load in three phases and it provides the power factor correction on the generator side

[1]  Robert D. Lorenz,et al.  Modeling of multileg sine-wave inverters: a geometric approach , 1999, IEEE Trans. Ind. Electron..

[2]  Lipei Huang,et al.  Fundamental characteristics of five-level double converters with adjustable dc voltages for induction motor drives , 2002, IEEE Trans. Ind. Electron..

[3]  Mark Sumner,et al.  Novel technique for maintaining balanced internal DC link voltages in diode clamped five-level inverters , 1999 .

[4]  L.M. Grzesiak,et al.  DC Link Balancing Method in Back-to-Back UPS System with Multi-Level Converters , 2006, 2006 IEEE International Symposium on Industrial Electronics.

[5]  U Seng-Pan,et al.  A 3D PWM control, H-bridge tri-level inverter for power quality compensation in three-phase four-wired systems , 2004, 2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512).

[6]  Mario Marchesoni,et al.  Diode-clamped multilevel converters: a practicable way to balance DC-link voltages , 2002, IEEE Trans. Ind. Electron..

[7]  F.M.A. Ghali,et al.  Dynamic analysis of hybrid wind/diesel system with three-level inverter , 2001, ISIE 2001. 2001 IEEE International Symposium on Industrial Electronics Proceedings (Cat. No.01TH8570).

[8]  T.A. Lipo,et al.  A reduced common mode hysteresis current regulation strategy for multilevel inverters , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[9]  K. Matsui,et al.  Multi-output chopper circuit for input power supplies of five-level inverter , 2004, The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04..

[10]  W. Koczara,et al.  A battery energy storage system for the Hygen electricity generator and power supply system , 1999, 1999 IEEE Africon. 5th Africon Conference in Africa (Cat. No.99CH36342).

[11]  M. da Ponte,et al.  Novel hybrid load-adaptive variable-speed generating system , 1998, IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357).

[12]  Poh Chiang Loh,et al.  A time-based double band hysteresis current regulation strategy for single-phase multilevel inverters , 2002 .