Coupling between the frequency droop and the voltage droop of an AC/DC converter in an MTDC system

Samy Akkari (1) , Jing Dai (1) , Marc Petit (1) , Xavier Guillaud (2)

1 GeePs - Laboratoire Génie électrique et électronique de Paris
2 L2EP - Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697

—MTDC systems are required to be reliable, and in certain cases, should participate in the AC grids frequency regulation. This can be achieved by providing AC/DC converters with a dual controller combining both the voltage-droop and the frequency-droop control techniques. In this paper, the coupling between the two droops is theoretically investigated and quantified for both a DC side fault and an AC side fault. A 5-terminal HVDC grid is simulated to validate the theoretical results.

Keywords: frequency control; HVDC; MTDC; voltage control

Domains: Engineering Sciences [physics]

Samy Akkari, Jing Dai, Marc Petit, Xavier Guillaud. Coupling between the frequency droop and the voltage droop of an AC/DC converter in an MTDC system. PowerTech, 2015 IEEE Eindhoven, Jun 2015, Eindhoven, France. ⟨10.1109/PTC.2015.7232285⟩. ⟨hal-01244005⟩