Analysis of Multi-Converter System’s Stability Using the Active Damping Method

Abstract:

In Multi-converter power electronic systems, load converters exhibit constant power load (CPL) behavior for the feeder converters and tend to destabilize the system. In this paper, Buck DC-DC converters are taken as an example, and the implementation of active-damping techniques has been shown to analyze the stability of multi-converter power electronic systems. Moreover, active damping is generally implemented by a feedback loop, which produces the effect of a virtual resistor and damps the oscillations, the proposed active-damping method can overcome the negative impedance instability problem caused by the CPLs. The effectiveness of the proposed approach has been verified by Matlab/Simulink simulations.

• Periodical: Applied Mechanics and Materials (Volumes 58-60)
• Pages: 950-955
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.58-60.950
• Online since: June 2011
• Authors: Guang Jun Xie, Hai Bin Fang, Hui Fang Xu
• Keywords: Active Damping, Constant Power Load (CPL), Continuous Conduction Model (CCM), DC/DC Buck Converter, Multi-Converter Power System, Negative Resistance

References

[1] A. Emadi, M. Ehsani, and J. M. Miller, Vehicular Electric Power Systems: Land, Sea, Air, and Space Vehicles. Marcel Dekker, (2004).

[2] A. M. Rahimi, A. Emadi, Active Damping in DC/DC Power Electronic Converters: A Novel Method to Overcome the Problems of Constant Power Loads, IEEE Trans. Ind. Electron., 2009, 56(5): 1428-1439.

DOI: 10.1109/tie.2009.2013748

[3] A. Emadi, Modeling and analysis of multi-converter DC power electronic systems using the generalized state-space averaging method, IEEE Trans. Ind. Electron., 2004, 51(3): 661–668.

DOI: 10.1109/tie.2004.825339

[4] A. Emadi, A. Khaligh, C. H. Rivetta, and G. A. Williamson, Constant power loads and negative impedance instability in automotive systems: Definition, modeling, stability, and control of power electronic converters and motor drives, IEEE Trans. Veh. Technol., 2006, 55(4): 1112–1125.

DOI: 10.1109/tvt.2006.877483

[5] P. Cancelliere, V. D. Colli, R. Di Stefano, and F. Marignetti, Modeling and control of a zero-current-switching DC/AC current-source inverter, IEEE Trans. Ind. Electron., 2007, 54(4): 2106–2119.

DOI: 10.1109/tie.2007.894786

[6] P. A. Dahono, A method to damp oscillations on the input LC filter of current-type AC–DC PWM converters by using a virtual resistor, in Proc. IEEE Telecomm. Energy Conf., 2003, 757–761.

[7] P. A. Dahono, A control method for DC–DC converter that has an LCL output filter based on new virtual capacitor and resistor concepts, in Proc. IEEE Power Electron. Spec. Conf., 2004, 36–42.

DOI: 10.1109/pesc.2004.1355709