A stabilization method for DC networks with constant-power loads

Author

Carmeli, Maria Stefania ; Forlani, Denis ; Grillo, Samuele ; Pinetti, Roberto ; Ragaini, Enrico ; Tironi, Enrico

Author_Institution

Dipt. di Elettrotec., Politec. di Milano, Milan, Italy

fYear

2012

fDate

9-12 Sept. 2012

Firstpage

617

Lastpage

622

Abstract

The stability of a DC power distribution system is a key design aspect. The presence of constant-power load induces negative impedance instabilities which should be considered during system design. In this paper the problem of DC power system stability is addressed and two solutions are proposed and compared. The former exploits the insertion of a suitably sized capacitor in parallel to the constant-power converter, while the latter makes use of a storage system controlled through a PI regulator. Simulation results are reported to verify the analysis.

Keywords

PI control; power convertors; power distribution control; power system stability; DC networks; DC power distribution system stability; PI regulator; constant-power converter; constant-power loads; negative impedance instabilities; stabilization method; storage system; Capacitors; Circuit stability; DC-DC power converters; Load modeling; Power system stability; Regulators; Stability analysis; DC distribution; DC voltage instability; DC-link voltage stability; constant power load (CPL) converter; energy storage; innovative control system; modeling and simulation; stabilization;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conference and Exhibition (ENERGYCON), 2012 IEEE International

Conference_Location

Florence

Print_ISBN

978-1-4673-1453-4

Type

conf

DOI

10.1109/EnergyCon.2012.6348226

Filename

6348226