References of "Wehenkel, Louis"
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See detailCompensation schemes for transient stability assessment and control
Ernst, Damien ULg; Bettiol, Arlon; Zhang, Yiwei et al

in Proceedings of LESCOPE 98 (1998)

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See detailVisualizing dynamic power system scenarios for data mining
Geurts, Pierre ULg; Wehenkel, Louis ULg

in Proceedings of LESCOPE 98, Large Engineering Syst. Conf. on Power Engineering (1998)

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See detailEarly prediction of electric power system blackouts by temporal machine learning
Geurts, Pierre ULg; Wehenkel, Louis ULg

in Proceedings of ICML-AAAI 98 Workshop on "Predicting the future: AI approaches to time series analysis" (1998)

This paper discusses the application of machine learning to the design of power system blackout prediction criteria, using a large database of random power system scenarios generated by Monte-Carlo ... [more ▼]

This paper discusses the application of machine learning to the design of power system blackout prediction criteria, using a large database of random power system scenarios generated by Monte-Carlo simulation. Each scenario is described by temporal variables and sequences of events describing the dynamics of the system as it might be observed from real-time measurements. The aime is to exploit the data base in order to derive as simple as possible rules which would allow to detect an incipient blackout early enough to prevent or mitigate it. We propose a novel "temporal tree induction" algorithm in order to exploit temporal attributes and reach a compromise between the degree of anticipation and selectivity of detection rules. Tests are carried out on a a data base related to voltage collapse of an existing large scale power system. [less ▲]

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See detailMachine-learning approaches to power-system security assessment
Wehenkel, Louis ULg

in IEEE Expert (1997), 12(5), 60-72

The paper discusses a framework that uses machine learning and other automatic-learning methods to assess power-system security. The framework exploits simulation models in parallel to screen diverse ... [more ▼]

The paper discusses a framework that uses machine learning and other automatic-learning methods to assess power-system security. The framework exploits simulation models in parallel to screen diverse simulation scenarios of a system, yielding a large database. Using data mining techniques, the framework extracts synthetic information about the simulated system's main features from this database [less ▲]

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See detailPower system security assessment: a position paper
Marceau, R.J.; Endrenyi, J.; Allan, R. et al

in Electra (1997), 175

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See detailSIME: A hybrid approach to fast transient stability assessment and contingency selection
Zhang, Ywee; Wehenkel, Louis ULg; Rousseaux, Patricia ULg et al

in International Journal of Electrical Power & Energy Systems (1997), 19(3), 195-208

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME ... [more ▼]

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME for Single Machine Equivalent. SIME relies on a particular direct method coupled with time-domain programs so as to combine the strengths of both, namely: the flexibility with respect to power system modelling of time-domain methods; the speed and richer information of the direct method. This paper lays the foundations of SIME, devises appropriate techniques for transient stability assessment per se and for contingency screening, and finally integrates these two techniques in a fully general function, i.e. able to comply with any power system modelling and stability scenario, and to assess any type of stability limits (critical clearing times or power limits). Throughout, real-world examples illustrate the proposed techniques and highlight their performances. [less ▲]

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See detailAn approach to real-time transient stability assessment and control
Pavella, Mania ULg; Wehenkel, Louis ULg; Bettiol, Arlon et al

in Techniques for stability limit search - Publication IEEE : TP-138-0 (1997)

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See detailAutomatic learning techniques in power systems
Wehenkel, Louis ULg

Book published by Springer (1997)

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See detailContingency severity assessment for voltage security using non-parametric regression techniques
Wehenkel, Louis ULg

in IEEE Transactions on Power Systems (1996), 11(1), 101-111

This paper proposes a novel approach to power system voltage security assessment exploiting nonparametric regression techniques to extract simple, and at the same time reliable, models of the severity of ... [more ▼]

This paper proposes a novel approach to power system voltage security assessment exploiting nonparametric regression techniques to extract simple, and at the same time reliable, models of the severity of a contingency, defined as the difference between pre- and post-contingency load power margins. The regression techniques extract information from large sets of possible operating conditions of a power system screened offline via massive random sampling, whose voltage security with respect to contingencies is pre-analyzed using an efficient voltage stability simulation. In particular, regression trees are used to identify the most salient parameters of the pre-contingency topology and electrical state which influence the severity of a given contingency, and to provide a first guess transparent approximation of the contingency severity in terms of these latter parameters. Multilayer perceptrons are exploited to further refine this information. The approach is demonstrated on a realistic model of a large scale voltage stability limited power system, where it shows to provide valuable physical insight and reliable contingency evaluation. Various potential uses in power system planning and operation are discussed [less ▲]

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See detailFirst- and multi-swing transient stability limits of the Hydro-Québec system using the SIME method
Zhang, Y.; Wehenkel, Louis ULg; Rousseaux, Patricia ULg et al

in Proceedings of the Melecon'96 Conference (1996)

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See detailSIME : a comprehensive approach to fast transient stability assessment
Zhang, Y.; Rousseaux, Patricia ULg; Wehenkel, Louis ULg et al

in Proceeding of the IEE Japan'96 Conference (1996)

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See detailOn uncertainty measures used for decision tree induction
Wehenkel, Louis ULg

in Bouchon-Meunier, Bernadette (Ed.) Information Processing and Management of Uncertainty in Knowledge-Based Systems (1996)

This paper provides a further look at uncertainty or information criteria used in the context of deci- sion tree induction, and more generally of learn- ing conditional class probability models. We show ... [more ▼]

This paper provides a further look at uncertainty or information criteria used in the context of deci- sion tree induction, and more generally of learn- ing conditional class probability models. We show the high degree of similarity among two main families of criteria based respectively on the logarithmic SHANNON entropy function and the quadratic GINI index. We start by introduc- ing a general family of entropy functions and then discuss the latter particular cases, and end up with a short review of the Kolmogorov-Smirnov dis- tance,anotherrelatedmeasure. [less ▲]

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See detailStatistical approaches to dynamic security assessment : the data base generation problem
Jacquemart, Yannick; Wehenkel, Louis ULg; Van Cutsem, Thierry ULg et al

in Proc. 2nd IFAC Symposium on Control of Power Plants and Power Systems (1995)

Detailed reference viewed: 14 (1 ULg)
See detailHybrid extended equal-area criterion for fast transient stability assessment with detailed power system models
Zhang, Y.; Rousseaux, Patricia ULg; Wehenkel, Louis ULg et al

in Proceedings of the IFAC Symposium on Control of Power Plants and Power Systems (1995)

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See detailMachine Learning Approaches to Power System Security Assessment
Wehenkel, Louis ULg

Thèse d’agrégation de l’enseignement supérieur (1994)

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See detailMachine learning, neural networks and statistical pattern recognition for voltage security: a comparative study
Wehenkel, Louis ULg; Van Cutsem, Thierry ULg; Pavella, Mania ULg et al

in Proc. 5th International Conference on Intelligent System Applications to Power systems (1994, September)

Detailed reference viewed: 18 (0 ULg)
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See detailMachine learning, neural networks and statistical pattern recognition for voltage security: a comparative study
Wehenkel, Louis ULg; Van Cutsem, Thierry ULg; Pavella, Mania ULg et al

in International Journal of Intelligent Systems (1994), 2

Detailed reference viewed: 16 (2 ULg)
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See detailDecision tree approaches to voltage security assessment
Van Cutsem, Thierry ULg; Wehenkel, Louis ULg; Pavella, Mania ULg et al

in IEE Proceedings - Generation, Transmission & Distribution (1993), 140

Detailed reference viewed: 24 (1 ULg)
See detailDynamic extended equal area criterion. Part 2. Embedding fast valving and automatic voltage regulation
Xue, Yusheng; Zhang, Y.; Gao, Z. et al

in Procedings of the IEEE Athens Power Tech Conference (1993)

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See detailDynamic extended equal area criterion. Part 1. Basic formulation
Xue, Yusheng; Rousseaux, Patricia ULg; Gao, Z. et al

in Proceedings of the IEEE Athens Power Tech Conference (1993)

Detailed reference viewed: 50 (0 ULg)