Tracking changes in the external network model

Emami, Roozbeh; Abur, Ali

doi:10.1109/naps.2010.5618980

Cited by 24 publications

(26 citation statements)

References 18 publications

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“…Lastly, as mentioned in Section I, it is currently impossible to acquire θ E in real time. In contrast, similar to [5], [11] and [12], the present paper adopts the linear DC flow model, which has been used extensively for various power system monitoring tasks.…”

Section: B Unveiling Network Faults Of Line Outagesmentioning

confidence: 99%

“…To this end, the differenceB := B − B ′ denoting the weighted Laplacian for the outage lines inẼ, is written as [cf. (5…”

Section: Overcomplete Representation Of Line Outagesmentioning

confidence: 99%

“…Such an approach incurs combinatorial complexity, and has confined existing methods based on extensive enumeration of all combinations, to identifying single-line outage [5], [11], or at most double-line outages after reducing the search space [12].…”

Section: Overcomplete Representation Of Line Outagesmentioning

confidence: 99%

“…Instead of these off-the-shelf solvers, the block coordinate descent (BCD) method will be adapted in the next section for solving (11), because it exploits the specific problem structure and can find the line outage identification path for a sequence of regularization parameters. Compared to previous works constrained to at most double-line outages [5], [11], [12], the proposed formulation overcomes the inherent combinatorial complexity with a virtual "outage" at every possible transmission line. By leveraging the sparse signal representation framework, the proposed approach offers the potential to achieve high accuracy in recovering faults with more than two line outages, while bypassing the computationally prohibitive enumeration of combinations for potential line outages.…”

Section: Overcomplete Representation Of Line Outagesmentioning

confidence: 99%

“…Existing approaches typically formulate external line-outage identification as a combinatorially complex (integer programming) problem, which can be computationally tractable only for single-or at most double-line outages [5], [11], [12]. An alternative approach adopts a Gauss-Markov graphical model of the power network and can cope with multiple outages at affordable complexity, but assumes conditionally independent phasor angle measurements and requires inter-system PMU data to be available in real time across the grid [8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Lassoing line outages in the smart power grid

Zhu

Giannakis

2011

2011 IEEE International Conference on Smart Grid Communications (SmartGridComm)

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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 leastabsolute 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.Index Terms-Identification of line outages, compressive sampling, basis pursuit, Lasso, block coordinate descent.

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Section: B Unveiling Network Faults Of Line Outagesmentioning

confidence: 99%

“…To this end, the differenceB := B − B ′ denoting the weighted Laplacian for the outage lines inẼ, is written as [cf. (5…”

Section: Overcomplete Representation Of Line Outagesmentioning

confidence: 99%