Distributed and Distributionally Robust Chance-Constrained Scheduling for VSC-MTDC Meshed AC/DC Power Networks

This article focuses on the distributed and distributionally robust dispatch for VSC-based multiterminal high voltage direct current (VSC-MTDC) meshed AC/DC power networks with a high penetration of wind power. The regional AC grid is formulated as a joint distributionally robust chance-constrained dispatch model to handle the uncertain wind power, which is solved by a Bonferroni and conditional value-at-risk approximation algorithm. The MTDC grid is formulated as a flexible operation model to fully utilize the unique power flow regulation capability of VSCs in adapting to wind power variations and promoting wind power accommodation. In addition, a distributed and parallel solution based on a tailored accelerated alternating direction method of multipliers algorithm with a predictor-corrector strategy is introduced to enable the distributed and distributionally robust scheduling, which can effectively solve the resulting distributed strongly convex quadratic programming problem, ensuring the computational efficiency and preserving the decision-making independence of different entities. Case studies validate the effectiveness of the proposed approach.