A DC power system stabilizer based on passivity-oriented DC bus impedance shaping

Document Type : Article


Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran


High penetration of Power Electronic (PE) converters in DC power grids has caused new stability challenges due to dynamic interactions among a network’s subsystems. Dynamic interactions can be avoided by the impedance coordination between the subsystems through the modification of control loops or passive elements inside a grid. Impedance coordination is a very complex and time-consuming task with no adaptations to dynamic changes in a power grid. In this paper, the concepts of dynamic interaction and passivity are explained and combined together to provide an online stability measure in terms of the DC bus impedance characteristics. A novel DC Power System Stabilizer (PSS) is proposed which is connected to a DC bus as a separate module passivizing the bus impedance at non-passive interaction frequencies. The interaction frequencies are detected through a broadband online identification process. The PSS working principle, topology, modeling, and control designs are explained in detail. Finally, the functionality and performance of the proposed stabilizer are validated by simulation results.


1. Verdicchio, A., Ladoux, P., Caron, H., et al. "New medium-moltage DC railway electrification system", IEEE Trans. Transp. Electrif., 4(2), pp. 591-604 (2018).
2. Gholdston, E.W., Karimi, K., Lee, F.C., et al. "Stability of large DC power systems using switching converters, with application to the international space station", in IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference, 1, pp. 166-171 (1996).
3. Reed, G.F., Grainger, B.M., Sparacino, A.R., et al. "Ship to grid: medium-voltage dc concepts in theory and practice", IEEE Power Energy Mag., 10(6), pp. 70-79 (2012).
4. De Doncker, R.W. "Power electronic technologies for  flexible DC distribution grids", in 2014 International Power Electronics Conference (IPEC-Hiroshima 2014- ECCE ASIA), pp. 736-743 (2014).
5. Kazmierkowski, M.P., Krishnan, R., Blaabjerg, F., et al. Control in Power Electronics: Selected Problems, Academic press (2002).
6. Cupeli, M., Ponci, F., Sulligoi, G., et al. "Power  flow control and network stability in an all-electric ship", Proc. IEEE, 103(12), pp. 2355-2380 (2015).
7. Mollerstedt, E. and Bernhardsson, B. "Out of control because of harmonics-an analysis of the harmonic response of an inverter locomotive", IEEE Control Syst. Mag., 20(4), pp. 70-81 (2000).
8. Cupelli, M., Zhu, L., and Monti, A. "Why ideal constant power loads are not the worst case condition from a control standpoint", IEEE Trans. Smart Grid, 6(6), pp. 2596-2606 (2014).
9. Middlebrook, R.D. "Input filter considerations in design and application of switching regulators", IAS'76 (1976).
10. Riccobono, A. and Santi, E. "Comprehensive review of stability criteria for DC power distribution systems", IEEE Trans. Ind. Appl., 50(5), pp. 3525-3535 (2014).
11. Sudhoff, S.D. and Crider, J.M. "Advancements in generalized immittance based stability analysis of DC power electronics based distribution systems", in 2011 IEEE Electric Ship Technologies Symposium, pp. 207- 212 (2011).
12. Liu, J., Feng, X., Lee, F.C., et al. "Stability margin monitoring for DC distributed power systems via perturbation approaches", IEEE Trans. Power Electron., 18(6), pp. 1254-1261 (2003).
13. Riccobono, A. and Santi, E. "A novel passivity-based stability criterion (PBSC) for switching converter DC distribution systems", in 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), pp. 2560-2567 (2012).
14. Paice, A.D.B. and Meyer, M. "Rail network modelling and stability: the input admittance criterion", in 14th Int. Symp. Math. Theory Netw. Syst., Perpignan, France, pp. 1-6 (2000).
15. Aeberhard, M., Meyer, M., and Courtois, C. "The new standard EN 50388-2, part 2-stability and harmonics", Elektrische Bahnen, 12(1), pp. 28-35 (2014).
16. Mingfei, W.U. and Lu, D.D.C. "Active stabilization methods of electric power systems with constant power loads: a review", J. Mod. Power Syst. Clean Energy, 2(3), pp. 233-243 (2014).
17. Guo, L., Zhang, S., Li, X., et al. "Stability analysis and damping enhancement based on frequency-dependent virtual impedance for DC microgrids", IEEE J. Emerg. Sel. Top. Power Electron., 5(1), pp. 338-350 (2016).
18. Harnefors, L., Bongiorno, M., and Lundberg, S. "Input-admittance calculation and shaping for controlled voltage-source converters", IEEE Trans. Ind. Electron., 54(6), pp. 3323-3334 (2007).
19. Sudhoff, S.D., Corzine, K.A., Glover, S.F., et al. "DC link stabilized field oriented control of electric propulsion systems", IEEE Trans. Energy Convers., 13(1), pp. 27-33 (1998).
20. Sulligoi, G., Bosich, D., Giadrossi, G., et al. "Multiconverter medium voltage DC power systems on ships: Constant-power loads instability solution using linearization via state feedback control", IEEE Trans. Smart Grid, 5(5), pp. 2543-2552 (2014).
21. Cupelli, M., Mirz, M., and Monti, A. "Application of backstepping to MVDC ship power systems with constant power loads", in 2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS), pp. 1- 6 (2015).
22. Kondratiev, I. and Dougal, R. "Synergetic control strategies for shipboard DC power distribution systems", in 2007 American Control Conference, pp. 4744-4749 (2007).
23. Magne, P., Nahid-Mobarakeh, B., and Pierfederici, S. "Dynamic consideration of DC microgrids with constant power loads and active damping system-A design method for fault-tolerant stabilizing system", IEEE J. Emerg. Sel. Top. Power Electron., 2(3), pp. 562-570 (2014).
24. Riccobono, A., Siegers, J., and Santi, E. "Stabilizing positive feed-forward control design for a DC power distribution system using a passivity-based stability criterion and system bus impedance identification", in 2014 IEEE Applied Power Electronics Conference and Exposition-APEC 2014, pp. 1139-1146 (2014).
25. Abdollahi, H., Arrua, S., Roinila, T., et al. "A novel dc power distribution system stabilization method based on adaptive resonance-enhanced voltage controller", IEEE Trans. Ind. Electron., 66(7), pp. 5653-5662 (2018).
26. Iyer, V.M., Gulur, S., Bhattacharya, S., et al. "An active voltage stabilizer for a generic dc microgrid", in 2019 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 462-468 (2019).
27. Mohamad, A.M.E.I. and Mohamed, Y.A.R.I. "Investigation and assessment of stabilization solutions for dc microgrid with dynamic loads", IEEE Trans. Smart Grid, 10(5), pp. 5735-5747 (2019).
28. Suntio, T., Dynamic Profile of Switched-Mode Converter: Modeling, Analysis and Control, John Wiley & Sons (2009). 
29. Anderson, B.D.O. and Vongpanitlerd, S. "Network analysis and synthesis: a modern systems theory approach", Courier Corporation, 1, pp. 40-50 (2013).
30. Van Valkenburg, M.E., Introduction to Modern Network Synthesis, John Wiley & Sons, 1, pp. 62-79 (1966).
31. Godfrey, K. "Perturbation signals for system identification", Prentice Hall International (UK) Ltd. (1993).
32. Martin, D., Santi, E., and Barkley, A. "Wide bandwidth system identification of AC system impedances by applying perturbations to an existing converter", in 2011 IEEE Energy Conversion Congress and Exposition, pp. 2549-2556 (2011).
33. Teodorescu, R., Liserre, M., and Rodriguez, P., Grid Converters for Photovoltaic and Wind Power Systems, 29, John Wiley & Sons (2011).
34. Miao, B., Zane, R., and Maksimovic, D. "System identification of power converters with digital control through cross-correlation methods", IEEE Trans. Power Electron., 20(5), pp. 1093-1099 (2005).