Lassoing line outages in the smart power grid

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Fast and accurate unveiling of power line outages is of paramount importance not only for preventing faults that may lead to blackouts, but also for routine monitoring and control tasks of the smart grid, including state estimation and optimal power flow. Existing approaches are either challenged by the combinatorial complexity issues involved, and are thus limited to identifying single- and double-line outages; or, they invoke less pragmatic assumptions such as conditionally independent phasor angle measurements available across the grid. Using only a subset of voltage phasor angle data, the present paper develops a near real-time algorithm for identifying multiple line outages at the affordable complexity of solving a quadratic program via block coordinate descent iterations. The novel approach relies on reformulating the DC linear power flow model as a sparse overcomplete expansion, and leveraging contemporary advances in compressive sampling and variable selection using the least-absolute shrinkage and selection operator (Lasso). Analysis and simulated tests on the standard IEEE 118-bus system confirm the effectiveness of lassoing line changes in the smart power grid.

Original languageEnglish (US)
Title of host publication2011 IEEE International Conference on Smart Grid Communications, SmartGridComm 2011
Pages570-575
Number of pages6
DOIs
StatePublished - Dec 1 2011
Event2011 IEEE 2nd International Conference on Smart Grid Communications, SmartGridComm 2011 - Brussels, Belgium
Duration: Oct 17 2011Oct 20 2011

Publication series

Name2011 IEEE International Conference on Smart Grid Communications, SmartGridComm 2011

Other

Other2011 IEEE 2nd International Conference on Smart Grid Communications, SmartGridComm 2011
CountryBelgium
CityBrussels
Period10/17/1110/20/11

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