Tuesday, 16:15 - 16:40 h, Room: MA 549


Naiyuan Chiang
Solving SCOPF problems by a new structure exploiting interior point method

Coauthor: Andreas Grothey


The aim of this paper is to demonstrate a new approach to solve the linearized (n-1) security constrained optimal power flow (SCOPF) problem by OOPS, which is a modern structure-exploiting primal-dual interior-point (IPM) implementation.

Firstly, we present a reformulation of the SCOPF model, in which most matrices that need to be factorized are constant. Consequently, most factorizations and a large number of backsolve operations only need to be performed once throughout the IPM iterations.
Moreover, we suggest to use a preconditioned iterative method to solve the corresponding linear system when we assemble the Schur complement matrix. We suggest several schemes to pick a good and robust preconditioner based on combining different "active'' contingency scenarios. We give results on several SCOPF test problems. The largest example contains 500 buses. We compare the results from the original IPM implementation in OOPS and our new approaches.


Talk 3 of the invited session Tue.3.MA 549
"Optimization for power grids" [...]
Cluster 18
"Optimization in energy systems" [...]


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