Corporacion CENACE

Quito, Ecuador

Corporacion CENACE

Quito, Ecuador
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Echeverria D.E.,Corporacion CENACE | Rueda J.L.,University of Duisburg - Essen | Cepeda J.C.,Corporacion CENACE | Colome D.G.,National University of San Juan | Erlich I.,University of Duisburg - Essen
2013 4th IEEE/PES Innovative Smart Grid Technologies Europe, ISGT Europe 2013 | Year: 2013

Secure operation of power systems is receiving a renewed interest due to considerable structural changes and greater uncertainties. Thus, motivated by implementation of wide-area measurement systems in power systems worldwide, recent research work is being devoted to the development of enhanced tools for fast security assessment within reduced time frames. The work presented in this paper introduces an approach that exploits the post-disturbance data acquired via phasor measurement units (PMUs) by using a finite difference based method for the prediction of rotor angles, data-mining-based clustering for identification of critical machines, and single-machine-infinite bus (SMIB) transformation to evaluate the system transient stability in terms of unstable margin and time to instability. Numerical results obtained by applying the approach on the New England test system demonstrates the feasibility and effectiveness that could be achieved in predicting the critical machines and unstable conditions, which is also of great value for defining suitable emergency control actions. © 2013 IEEE.

Rueda J.L.,Technical University of Delft | Cepeda J.C.,Corporacion CENACE | Erlich I.,University of Duisburg - Essen
IET Generation, Transmission and Distribution | Year: 2014

This study presents a comprehensive approach to tackle the problem of optimal placement and coordinated tuning of power system supplementary damping controllers (OPCTSDC). The approach uses a recursive framework comprising probabilistic eigenanalysis (PE), a scenario selection technique (SST) and a new variant of mean-variance mapping optimisation algorithm (MVMO-SM). Based on probabilistic models used to sample a wide range of operating conditions, PE is applied to determine the instability risk because of poorly-damped oscillatory modes. Next, the insights gathered from PE are exploited by SST, which combines principal component analysis and fuzzy c-means clustering algorithm to extract a reduced subset of representative scenarios. The multi-scenario formulation of OPCTSDC is then solved by MVMO-SM. A case study on the New England test system, which includes performance comparisons between different modern heuristic optimisation algorithms, illustrates the feasibility and effectiveness of the proposed approach. © The Institution of Engineering and Technology 2014.

Rueda J.L.,Technical University of Delft | Cepeda J.,Corporacion CENACE | Erlich I.,University of Duisburg - Essen | Echeverria D.,Corporacion CENACE | Arguello G.,Corporacion CENACE
International Journal of Electrical Power and Energy Systems | Year: 2015

This paper introduces an approach for identification of dynamic equivalent parameters from measured operational dynamic responses associated to different disturbances. To tackle challenges related to optimization problem complexity (i.e., non-linearity of time-domain simulation based fitness calculation, discontinuity, non-convexity, and multimodality), the approach adopts a novel variant of the mean-variance mapping optimization algorithm to pursue efficient and fast search capability. This variant bases on swarm intelligence precepts and employs a multi-parent crossover criterion for offspring creation. Numerical tests performed on the Ecuadorian-Colombian interconnected system, including performance comparisons with other heuristic optimization tools, support the potential of the proposal to provide accurate estimates within a fast convergence rate. © 2014 Elsevier Ltd. All rights reserved.

Rueda J.L.,University of Duisburg - Essen | Cepeda J.C.,National University of San Juan | Echeverria D.E.,Corporacion CENACE | Arguello G.A.,Corporacion CENACE
2013 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT LA 2013 | Year: 2013

This paper reviews general aspects about the current status and future activities towards implementation of advanced smart grid functionalities in the Ecuadorian National Interconnected System. Based on recent developmental breakthroughs, solutions to some relevant embedded operational issues are suggested in order to minimize the system security risks. Preliminary research results demonstrate the viewpoint and effectiveness of some of the proposals. © 2013 IEEE.

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