@inproceedings{molzahn_lesieutre_demarco-hicss2014,
	author={D. K. Molzahn and B. C. Lesieutre and C. L. DeMarco},
	booktitle={47th Hawaii International Conference on System Sciences},
	title={{Investigation of Non-zero Duality Gap Solutions to a Semidefinite Relaxation of the Optimal Power Flow Problem}},
	year={2014},
	pages={2325-2334},
	month={January},
	doi={10.1109/HICSS.2014.293},
	keywords={Optimal Power Flow},
		abstract={Recently, a semi definite programming relaxation of the power flow equations has been applied to the optimal power flow problem. When this relaxation is "tight" (i.e., the solution has zero duality gap), a globally optimal solution is obtained. Existing literature investigates sufficient conditions whose satisfaction guarantees zero duality gap solutions. However, there is limited study of non-zero duality gap solutions. By illustrating the feasible spaces for optimal power flow problems and their semi definite relaxations, this paper investigates examples of non-zero duality gap solutions. Results for large system models suggest that non-convexities associated with small subsections of the network are responsible for non-zero duality gap solutions.},
	url_Paper={molzahn_lesieutre_demarco-hicss2014.pdf},
	url_Link={http://ieeexplore.ieee.org/document/6758891/},
}

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