01788nas a2200229 4500008003900000022001400039245009600053210006900149260001100218300001600229490000700245520106900252653001301321653000901334653002901343653001001372100002401382700002201406700002701428700002901455856007401484 2013 d a0885-895000aImplementation of a Large-Scale Optimal Power Flow Solver Based on Semidefinite Programming0 aImplementation of a LargeScale Optimal Power Flow Solver Based o c4/2013 a3987 - 39980 v283 aThe 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.10aAA13-00510aAARD10aoptimal power flow (OPF)10aRTGRM1 aMolzahn, Daniel, K.1 aHolzer, Jesse, T.1 aLesieutre, Bernard, C.1 aDeMarco, Christopher, L. uhttps://certs.lbl.gov/publications/implementation-large-scale-optimal01713nas a2200181 4500008003900000022001400039245003600053210003200089260001200121490000600133520122000139653001301359100002201372700002201394700002901416700002301445856006301468 2009 d a1540-797700aIs teamwork the smart solution?0 ateamwork the smart solution c03/20090 v73 aOne of the most formidable tasks facing humanity at the moment is how to solve the problems associated with energy supply and utilization. The issues are complex, to be sure, and they're compounded by seemingly conflicting objectives involving cost, sustainability, reliability, environmental soundness, free markets, and an energy supply that is accessible to all--anytime. Because there??s special interest in enhancing the sustainability of a modern lifestyle, one approach to the problem is to use renewable resources--mainly solar and wind--to power the world economy. Some renewable resources have the added benefit of low environmental impact, especially in greenhouse gas production. There's also great interest in restructured energy and power markets that are called "free" or "liberalized" in some parts of the world and "deregulated" in the United States. The deregulation of the electric power industry in many venues has resulted in a new science and engineering of power marketing. There are complex basic challenges in solving the problems that are related to an unfettered power market that results in an environmentally sound production of electric power and also a reliable and low-cost solution.10aAA05-0031 aKezunovic, Mladen1 aHeydt, Gerald, T.1 aDeMarco, Christopher, L.1 aMount, Timothy, D. uhttps://certs.lbl.gov/publications/teamwork-smart-solution