access icon free Fully distributed multi-area dynamic economic dispatch method with second-order convergence for active distribution networks

© The Institution of Engineering and Technology
Received 02/12/2016, Accepted 28/05/2017, Revised 02/03/2017, Published 06/06/2017

In active distribution networks, distributed generators are integrated into microgrids or geographically distributed subsystems. They may belong to different owners and are operated independently to preserve privacy. Therefore, fully distributed economic dispatch (ED) methods are needed and most existing algorithms show first-order convergence. This study introduces a fully distributed dynamic ED with second-order convergence, which is based on a parallel primal–dual interior-point algorithm with a matrix-splitting technique. In this method, each area optimises its own problem with limited information exchanged with its neighbours, and no central coordinator is needed. Numerical tests demonstrate that the algorithm can converge at a second-order rate. On the basis of a peer-to-peer communication paradigm, this method can achieve a global optimum while the privacy of each area is obliquely protected.

Inspec keywords: power generation dispatch; power distribution economics; power generation economics; convergence of numerical methods; matrix algebra; optimisation; distributed power generation

Other keywords: fully distributed dynamic ED; parallel primal–dual interior-point algorithm; second-order convergence; numerical tests; peer-to-peer communication paradigm; active distribution network; microgrid; distributed generator; matrix-splitting technique; geographically distributed subsystems; fully distributed multiarea dynamic economic dispatch method

Subjects: Linear algebra (numerical analysis); Power system management, operation and economics; Distribution networks; Optimisation techniques; Distributed power generation

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