Research on Virtual Synchronous Machine Control Strategy for Flexible DC Systems

Le résumé fourni par la source

Aiming at the problem that the voltage source-based multi-terminal flexible DC transmission system adopts dq double-loop control and fails to provide system inertia, an adaptive droop control strategy is proposed, which makes use of the virtual synchronous generator technology to adjust the voltage of the system. to provide system inertia, an adaptive droop control strategy is proposed, which makes use of the virtual synchronous generator technology to adjust the power distribution according to the frequency change of the AC system, and improves the inertia level of the system, so as to solve the stability problem of the DC system under perturbation, and to provide support for the weak AC power grid. Meanwhile, for the N-2 fault that occurred during the overhaul of the Enshi power grid in the Yu-E project, it is verified by PSCAD/EMTDC simulation, comparing with the original current vector control strategy, and the results show the effectiveness of the new strategy. The results show the effectiveness of the new strategy under the weak system, which provides technical support for the weak system access, inertia compensation, and voltage support in the field. compensation, and voltage support in the field of new energy in the future.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.