A. Egea-alvarez, J. Beerten, D. V. Hertem, and O. Gomis-bellmunt, Hierarchical power control of multiterminal HVDC grids, Electric Power Systems Research, vol.121, pp.207-215, 2015.

T. K. Vrana, J. Beerten, R. Belmans, and O. B. Fosso, A classification of DC node voltage control methods for HVDC grids, Electric Power Systems Research, vol.103, pp.137-144, 2013.

M. Andreasson, M. Nazari, D. V. Dimarogonas, H. Sandberg, K. H. Johansson et al., Distributed voltage and current control of multi-terminal high-voltage direct current transmission systems, IFAC Proceedings Volumes, vol.47, pp.11910-11916, 2014.

J. Beerten and R. Belmans, Analysis of power sharing and voltage deviations in droop-controlled DC grids, IEEE Transactions on, vol.28, issue.4, pp.4588-4597, 2013.

S. Shah, R. Hassan, and J. Sun, HVDC transmission system architectures and control -a review, Control and Modeling for Power Electronics, 2013 IEEE 14th Workshop on, pp.1-8, 2013.

T. Haileselassie, T. Undeland, and K. Uhlen, Multiterminal HVDC for offshore windfarms -control strategy, European Power Electronics and Drives Association, 2009.

J. Zhao and F. Dörfler, Distributed control and optimization in DC microgrids, Automatica, vol.61, pp.18-26, 2015.

N. Monshizadeh, C. D. Persis, A. Van-der-schaft, and J. M. Scherpen, A networked reduced model for electrical networks with constant power loads, CoRR, 2015.

J. W. Simpson-porco, F. Dörfler, and F. Bullo, On resistive networks of constant-power devices, IEEE Transactions on, vol.62, pp.811-815, 2015.

N. Barabanov, R. Ortega, R. Grino, and B. Polyak, On existence and stability of equilibria of linear time-invariant systems with constant power loads, IEEE Transactions on, issue.99, pp.1-8, 2015.
URL : https://hal.archives-ouvertes.fr/hal-01632549

D. Zonetti, R. Ortega, and J. Schiffer, A tool for stability and power sharing analysis of a generalized class of droop controllers for highvoltage direct-current transmission systems, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01895479

D. Zonetti, R. Ortega, and A. Benchaib, Modeling and control of HVDC transmission systems from theory to practice and back, Control Engineering Practice, vol.45, pp.133-146, 2015.
URL : https://hal.archives-ouvertes.fr/hal-01261947

A. Yazdani and R. Iravani, Voltage-Sourced Controlled Power Converters -Modeling, Control and Applications, 2010.

H. Akagi, Instantaneous Power Theory and Applications to Power Conditioning, 2007.

P. Sauer, Time-scale features and their applications in electric power system dynamic modeling and analysis, American Control Conference (ACC), pp.4155-4159, 2011.

J. Schiffer, D. Zonetti, R. Ortega, A. Stankovic, T. Sezi et al., A survey on modeling of microgrids-from fundamental physics to phasors and voltage sources, Automatica, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01633758

A. Van-der and . Schaft, Characterization and partial synthesis of the behavior of resistive circuits at their terminals, Systems & Control Letters, vol.59, issue.7, pp.423-428, 2010.

S. Fiaz, D. Zonetti, R. Ortega, J. Scherpen, A. Van-der et al., A port-Hamiltonian approach to power network modeling and analysis, European Journal of Control, vol.19, issue.6, pp.477-485, 2013.

E. Prieto-araujo, F. Bianchi, A. Junyent-ferré, and O. Gomis-bellmunt, Methodology for droop control dynamic analysis of multiterminal vsc-hvdc grids for offshore wind farms, IEEE Transactions on, vol.26, pp.2476-2485, 2011.

M. Belkhayat, R. Cooley, and A. Witulski, Large signal stability criteria for distributed systems with constant power loads, Power Electronics Specialists Conference, 1995. PESC '95 Record., 26th Annual IEEE, vol.2, pp.1333-1338, 1995.

A. Kwasinski and C. N. Onwuchekwa, Dynamic behavior and stabilization of DC microgrids with instantaneous constant-power loads, IEEE Transactions on, vol.26, pp.822-834, 2011.

S. Sanchez, R. Ortega, R. Grino, G. Bergna, and M. Molinas, Conditions for existence of equilibria of systems with constant power loads, IEEE Transactions on, vol.61, issue.7, pp.2204-2211, 2014.
URL : https://hal.archives-ouvertes.fr/hal-00926131

M. Grant and S. Boyd, CVX: Matlab software for disciplined convex programming, version 2.1