Sensors 2014, 14(7), 13114-13133; doi:10.3390/s140713114
Distributed Power-Line Outage Detection Based on Wide Area Measurement System
Department of Computer Science, Georgia State University, 34 Peachtree Street, Atlanta, GA 30329, USA
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Received: 16 April 2014 / Revised: 12 July 2014 / Accepted: 14 July 2014 / Published: 21 July 2014
(This article belongs to the Special Issue Sensor Computing for Mobile Security and Big Data Analytics)
Abstract
In modern power grids, the fast and reliable detection of power-line outages is an important functionality, which prevents cascading failures and facilitates an accurate state estimation to monitor the real-time conditions of the grids. However, most of the existing approaches for outage detection suffer from two drawbacks, namely: (i) high computational complexity; and (ii) relying on a centralized means of implementation. The high computational complexity limits the practical usage of outage detection only for the case of single-line or double-line outages. Meanwhile, the centralized means of implementation raises security and privacy issues. Considering these drawbacks, the present paper proposes a distributed framework, which carries out in-network information processing and only shares estimates on boundaries with the neighboring control areas. This novel framework relies on a convex-relaxed formulation of the line outage detection problem and leverages the alternating direction method of multipliers (ADMM) for its distributed solution. The proposed framework invokes a low computational complexity, requiring only linear and simple matrix-vector operations. We also extend this framework to incorporate the sparse property of the measurement matrix and employ the LSQRalgorithm to enable a warm start, which further accelerates the algorithm. Analysis and simulation tests validate the correctness and effectiveness of the proposed approaches.Keywords:
line outage detection; convex optimization; smart grid; distributed computing; alternating direction method of multipliers
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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MDPI and ACS Style
Zhao, L.; Song, W.-Z. Distributed Power-Line Outage Detection Based on Wide Area Measurement System. Sensors 2014, 14, 13114-13133.