%0 Journal Article
%J IEEE Transactions on Power Systems
%D 2013
%T Implementation of a Large-Scale Optimal Power Flow Solver Based on Semidefinite Programming
%A Molzahn, Daniel K.
%A Holzer, Jesse T.
%A Bernard C. Lesieutre
%A Christopher L. DeMarco
%K AA13-005
%K AARD
%K optimal power flow (OPF)
%K RTGRM
%X The application of semidefinite programming to the optimal power flow (OPF) problem has recently attracted significant research interest. This paper provides advances in modeling and computation required for solving the OPF problem for large-scale, general power system models. Specifically, a semidefinite programming relaxation of the OPF problem is presented that incorporates multiple generators at the same bus and parallel lines. Recent research in matrix completion techniques that decompose a single large matrix constrained to be positive semidefinite into many smaller matrices has made solution of OPF problems using semidefinite programming computationally tractable for large system models. We provide three advances to existing decomposition techniques: a matrix combination algorithm that further decreases solver time, a modification to an existing decomposition technique that extends its applicability to general power system networks, and a method for obtaining the optimal voltage profile from the solution to a decomposed semidefinite program.
%B IEEE Transactions on Power Systems
%V 28
%P 3987 - 3998
%8 4/2013
%N 4
%! IEEE Trans. Power Syst.
%R 10.1109/TPWRS.2013.2258044
%0 Report
%D 2005
%T Improving Dynamic Load and Generator Response Performance Tools
%A Bernard C. Lesieutre
%K consortium for electric reliability technology solutions (certs)
%K FIDVR
%K FIDVR-007
%K WECC Composite Load Model
%X This report is a scoping study to examine research opportunities to improve the accuracy of the system dynamic load and generator models, data and performance assessment tools used by CAISO operations engineers and planning engineers, as well as those used by their counterparts at the California utilities, to establish safe operating margins. Model-based simulations are commonly used to assess the impact of credible contingencies in order to determine system operating limits (path ratings, etc.) to ensure compliance with NERC and WECC reliability requirements. Improved models and a better understanding of the impact of uncertainties in these models will increase the reliability of grid operations by allowing operators to more accurately study system voltage problems and the dynamic stability response of the system to disturbances.

%I LBNL
%C Berkeley
%P 74
%8 11/2005