Distributed stabilization in DC hybrid power systems

Nowadays Distributed Power Systems (DPSs) are used in different applications such as aerospace industry, submarines, ships and hybrid electric vehicles. However, interaction between the converters in these technologies, also create new challenges like instability due to the “Constant Power Loads” (CPL). In this paper, the small-signal analysis results of a DC hybrid power system are presented. This system is constituted of two load-converters with tight regulation, that exhibit CPL behavior and a battery with a DC-DC converter that are connected to a DC network. A distributed linear stabilization approach is considered to increase the reliability of the system; hence, an oscillation compensation technique is proposed to improve the stability margin of the system. Simulation and experimentation confirm the validity of the proposed approach.

[1]  Babak Nahid-Mobarakeh,et al.  Active stabilization of a poorly damped input filter supplying a constant power load , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[2]  F.C. Lee,et al.  Design considerations for a distributed power system , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[3]  B. Fahimi,et al.  Analysis and control of a buck DC-DC converter operating with constant power load in sea and undersea vehicles , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[4]  D. Howe,et al.  Large signal stability analysis of DC power systems with constant power loads , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[5]  S. Saadate,et al.  An Approach to Distribution System Planning by Implementing Distributed Generation in a Deregulated Electricity Market , 2007, 2007 Large Engineering Systems Conference on Power Engineering.

[6]  Ali Emadi,et al.  Active Damping in DC/DC Power Electronic Converters: A Novel Method to Overcome the Problems of Constant Power Loads , 2009, IEEE Transactions on Industrial Electronics.

[7]  R. Dougal,et al.  Synergetic control for DC-DC buck converters with constant power load , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[8]  A. Monti,et al.  A Geometric Approach to Large-signal Stability of Switching Converters under Sliding Mode Control and Synergetic Control , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[9]  Ali Emadi,et al.  Constant power loads and negative impedance instability in automotive systems: definition, modeling, stability, and control of power electronic converters and motor drives , 2006, IEEE Transactions on Vehicular Technology.

[10]  Ali Emadi,et al.  Loop-Cancellation Technique: A Novel Nonlinear Feedback to Overcome the Destabilizing Effect of Constant-Power Loads , 2010, IEEE Transactions on Vehicular Technology.

[11]  B. De Fornel,et al.  Nonlinear decoupling of an induction motor drive with input filter , 1995, Proceedings of International Conference on Control Applications.

[12]  D. Howe,et al.  Input Admittance Characteristics of Permanent Magnet Brushless AC Motor Drive Systems , 2007, 2007 IEEE Vehicle Power and Propulsion Conference.

[13]  G.A. Capolino,et al.  Torque Ripples Suppression for Six-Phase Induction Motors Under Open Phase Faults , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[14]  Ali Emadi,et al.  An Analytical Investigation of DC/DC Power Electronic Converters With Constant Power Loads in Vehicular Power Systems , 2009, IEEE Transactions on Vehicular Technology.

[15]  Babak Nahid-Mobarakeh,et al.  DC-Link Voltage Large Signal Stabilization and Transient Control Using a Virtual Capacitor , 2010, 2010 IEEE Industry Applications Society Annual Meeting.

[16]  B. Nahid-Mobarakeh,et al.  Linear Stabilization of a DC Bus Supplying a Constant Power Load: A General Design Approach , 2010, IEEE Transactions on Power Electronics.

[17]  Phatiphat Thounthong,et al.  Energy management of fuel cell/solar cell/supercapacitor hybrid power source , 2011 .

[18]  Fred C. Lee,et al.  Individual load impedance specification for a stable DC distributed power system , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[19]  Duong Tran,et al.  A simple design of DC power system with multiple source-side converters to operate stably underconstant power load , 2010, The 2nd International Symposium on Power Electronics for Distributed Generation Systems.

[20]  Fred C. Lee,et al.  A method of defining the load impedance specification for a stable distributed power system , 1993 .

[21]  Bo Wahlberg,et al.  Stabilization of Induction Motor Drives With Poorly Damped Input Filters , 2007, IEEE Transactions on Industrial Electronics.

[22]  B. Nahid-Mobarakeh,et al.  Stability investigation of inverter motor drive system with input filter — Optimisation of the DC-link capacitance value , 2008, 2008 IEEE Power Electronics Specialists Conference.

[23]  Babak Nahid-Mobarakeh,et al.  Contribution to Determination of Domain of Attraction in Power Systems: Application to Drives with Input Filter , 2009, 2009 IEEE Industry Applications Society Annual Meeting.

[24]  Scott D. Sudhoff,et al.  Three-dimensional stability analysis of DC power electronics based systems , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[25]  D. Howe,et al.  Stability assessment of AC hybrid power systems for ‘more electric’ aircraft , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[26]  S. Sul,et al.  DC-link voltage stabilization for reduced dc-link capacitor inverter , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[27]  Henri Bourlès,et al.  Robust nonlinear control associating robust feedback linearization and H∞ control , 2006, IEEE Trans. Autom. Control..

[28]  Shahrokh Saadate,et al.  A novel optimal distribution system planning framework implementing distributed generation in a deregulated electricity market , 2010 .

[29]  Fred C. Lee,et al.  Impedance specifications for stable DC distributed power systems , 2002 .