References of "Lilien, Jean-Louis"
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See detailWhat is the actual conductor temperature on Power Lines
Balghouzal, Salima ULg; Lilien, Jean-Louis ULg; El Adnani, Mustapha

in Electrical and Power Engineering Frontier (2013), 2(4), 118-129

This paper will focus on power lines conductor temperature recording owing to smart sensor which is giving access to behaviour of power line span. Laboratory testing heating up HTLS (high temperature low ... [more ▼]

This paper will focus on power lines conductor temperature recording owing to smart sensor which is giving access to behaviour of power line span. Laboratory testing heating up HTLS (high temperature low sag) conductor up to 200°C with a smart sensor installed on the conductor is detailed. [less ▲]

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See detailDYNAMIC LINE RATING AND AMPACITY FORECASTING AS THE KEYS TO OPTIMISE POWER LINE ASSETS WITH THE INTEGRATION OF RES. THE EUROPEAN PROJECT TWENTIES DEMONSTRATION INSIDE CENTRAL WESTERN EUROPE
Nguyen, Huu-Minh ULg; Schell, Peter; Lilien, Jean-Louis ULg

in Proceedings of Congrès International des Réseaux Electriques de Distribution (2013, June 12)

The general increase of Distributed & intermittent renewable Generation is pushing TSOs and DSOs to find innovative solutions to increase the capacity of their networks. Dynamic Line Rating (DLR) has ... [more ▼]

The general increase of Distributed & intermittent renewable Generation is pushing TSOs and DSOs to find innovative solutions to increase the capacity of their networks. Dynamic Line Rating (DLR) has proven to be a very promising solution to cope with this issue. However, few experiments so far have addressed ampacity forecasting, which is critical to allow the integration of DLR in the electricity market processes. To tackle this gap, we developed an algorithm based on real-time DLR measurements and weather forecasts, which provides ampacity forecasts up to two days ahead. This paper describes the results of the EU-funded TWENTIES Demo led in Belgium on two 150kV lines. Currently, the DLR system used provides a two-day ahead ampacity forecast with more than 10% average gain over static rating (dynamic gain forecast varying roughly between 0% and 30%) with 98% confidence. Operational gains allowed by this increase of flexibility are still being assessed. [less ▲]

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See detailLatest results in forecasting and DLR related to Twenties and other projects
Nguyen, Huu-Minh ULg; Doutreloup, Sébastien; Erpicum, Michel ULg et al

Conference (2013, March 05)

The goal of the meeting was to further (see Minutes of the WG3-DLR meeting which took place in Liège, Belgium, November 27th-28th 2012) investigate the “Dynamic Line Rating DLR” potential for the ... [more ▼]

The goal of the meeting was to further (see Minutes of the WG3-DLR meeting which took place in Liège, Belgium, November 27th-28th 2012) investigate the “Dynamic Line Rating DLR” potential for the efficient management of electric grids in view of the increasing share of intermittent renewable energies (wind & solar) and to proceed with the preparation of two posi-tion papers dedicated to 1) DLR forecasting and 2) DLR planning. It was also aimed at finaliz-ing the Terms of Reference for the establishment of a new Working Group within the Cigré B2 Study Committee. [less ▲]

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See detailanswer to a question from the general reporter in session B2, question 1.6
Lilien, Jean-Louis ULg

Conference (2012, August)

Technology to forecast up to 2 days ahead the ampacity of power lines is now mature owing to european project TWENTIES

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See detailGuide for Application of direct real-time monitoring systems
Stephen, Rob; Lilien, Jean-Louis ULg; seppa, Tap et al

Book published by CIGRE (2012)

Describe real-time monitoring systems available for power lines clearance and temperature evaluation by on line measurements.The brochure describe the transmission system operator demand for such ... [more ▼]

Describe real-time monitoring systems available for power lines clearance and temperature evaluation by on line measurements.The brochure describe the transmission system operator demand for such application, the existing system available on the market. Some case studies are detailed. [less ▲]

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See detailDevice, system and method for real time monitoring of overhead power lines
Lilien, Jean-Louis ULg; Destiné, Jacques ULg

Patent (2012)

Patent related to the sensor "Ampacimon" as accepted in USA. The sensor is directly fixed on power line conductor (any voltage) and is able, without any data, to give the sag of the span on which it is ... [more ▼]

Patent related to the sensor "Ampacimon" as accepted in USA. The sensor is directly fixed on power line conductor (any voltage) and is able, without any data, to give the sag of the span on which it is installed. The device is based on mechanical frequency detection which is a signature of the sag of the span in any conditions. The device is autonomous (it catches energy from the conductor) and informations are sent to a server which is then able to calculate ampacity of the power line. [less ▲]

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See detailLARGE PENETRATION OF DISTRIBUTED PRODUCTIONS: DYNAMIC LINE RATING AND FLEXIBLE GENERATION, A MUST REGARDING INVESTMENT STRATEGY AND NETWORK RELIABILITY
Schell, Peter; Lilien, Jean-Louis ULg; Nguyen, Huu-Minh ULg et al

Conference (2012, May)

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution ... [more ▼]

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution capacity of the grid in favorable weather conditions. Combining active network management (curtailable generation) with DLR as trigger offers a solution out-there for the <br />system operator that combines technical feasibility, adequate implementation timing and economic viability. Flexible generation being already in use on the ELIA network, the potential benefits of using it in conjunction with DLR will be analyzed. [less ▲]

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See detailEuropean project, demo “NETFLEX” For large integration of renewables using DLR, PST and PMU.
Lilien, Jean-Louis ULg

Conference (2012, February)

forecasting ampacity as a need for power system operation

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See detailDynamic Prediction of Energy Delivery Capacity of Power Networks : Unlocking the Value of Real-Time Measurements.
Schell, Peter; Jones, Lauren; Mack, Philippe et al

in Proceedings of the third IEEE PES Conference on Innovative Smart Grid Technologies (2012, January)

This paper describes recent advances in prediction software using advanced data-mining tools, and shows how this can significantly increase the operational value of the data gathered. These new tools ... [more ▼]

This paper describes recent advances in prediction software using advanced data-mining tools, and shows how this can significantly increase the operational value of the data gathered. These new tools allow for new operational procedures to be defined that increase the usages of the network without decreasing security of supply. We will use the example of dynamic line rating, i.e. determining the thermal rating of an overhead line based on real-time environmental parameters (temperature, wind speed & direction and solar radiation) to highlight how the use of numerical data-mining tools can help us reliably predict future behavior of power networks. [less ▲]

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See detailTWENTIES : EU project Massive integration of renewable T&D Smartgrids How cable dynamics may help ?
Lilien, Jean-Louis ULg

Conference (2011, October)

How dynamic line rating may be used for massive introduction of renewable in power systems

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See detailUsing Dynamic Line Rating to minimize curtailment of Wind power connected to rural power networks
Schell, Peter; LAMBIN, Jean-Jacques; Godard, Bertrand et al

in Proceedings of the 10th International Workshop on Large-Scale Integration of Wind Power into Power Systems (2011, October)

Elia, the Belgian TSO, is aiming to minimize curtailment of wind power plants connected to its 70kV rural network to the absolute minimum by using Dynamic Line Rating in combination with advanced flow ... [more ▼]

Elia, the Belgian TSO, is aiming to minimize curtailment of wind power plants connected to its 70kV rural network to the absolute minimum by using Dynamic Line Rating in combination with advanced flow simulation. This combination allows Elia to use its network assets to their real time maximum, without increasing risk and decreasing the security of supply. In situations like the one described below, where it’s possible to control the flow in near real-time via curtailment it becomes possible to use all of the extra capacity available via Dynamic Line Rating. On average more then 30% extra capacity is available but this figure can easily increase to 100% extra capacity as soon as there is more then 4 m/s wind perpendicular to the line [less ▲]

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See detailAeolian vibration on power-line conductors, evaluation of actual self damping
Guérard, Suzanne ULg; Godard, bertrand; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (2011), 26(4), 2118-2122

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Without dampers, the amplitude of vibration very much depends on conductor self damping, which may be very low. The purpose of ... [more ▼]

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Without dampers, the amplitude of vibration very much depends on conductor self damping, which may be very low. The purpose of this paper is to show measurements of these vibrations carried out by a new experimental device which is able to perform continuous measurements in the full range of frequencies and amplitudes. In this paper, 550 hours of continuous recording on four different conductors placed in similar conditions is detailed. An evaluation of self damping power, based on observations is proposed. [less ▲]

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See detailPower Line conductors self damping : a new approach.
Guérard, Suzanne ULg; Lilien, Jean-Louis ULg

in Proceedings of the 9th International Symposium on Cable Dynamics (2011, October)

Up to now, self damping data generally comes from dynamic tests performed on test spans which length is of the order of some tens of meters. Those tests rely on the assumption that the conductor self ... [more ▼]

Up to now, self damping data generally comes from dynamic tests performed on test spans which length is of the order of some tens of meters. Those tests rely on the assumption that the conductor self damping changes the amplitude of incident and reflected travelling wave. In other words, there are no standing wave within a vibrating conductor and in practice, the amount of self damping is deduced from measurements of vibration amplitudes at adjacent “false vibration nodes”. The corresponding measurements require lots of dexterity and accuracy. This paper investigates the possibility of deducing the self damping properties of power line conductors from a series of tests performed quasi statically on a short prestressed conductor sample. Data recorded by Godinas [1] on 4 m long prestressed conductor samples has been used as an input (the conductors used are made of aluminium alloy, type AMS). This data was obtained by applying a cyclic quasi-static bending moment in the middle of the conductor sample and recording the corresponding strains. The experiment was reproduced at several prestress levels. A mining and analysis of this data has been performed so that in a first time the relationship between moment and curvature can be adequately defined. Then the corresponding internal work has been computed analytically (per integration). Finally a formulation for the self damping per unit length is proposed as a function of the antinode amplitude of vibration, frequency, conductor tension, bending stiffness, mass per unit length plus a special parameter called “b”. The latter parameter has the dimension of energy [J]. The corresponding results are found to be consistent with those deduced from the widely used “power law”, using Noiseux’s exponents [2, 3]. Also, a simplified version of the formula shows that the sensitivity of the self damping to the vibration amplitude, frequency and tension is comparable to that found by others authors using another self damping measurement technique [1], but with the difference that in this case, the exponents for frequency, amplitude and tension are integers, fully justified by the physics behind the phenomenon of damping. [less ▲]

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See detailOriginal real-time observations of aeolian vibrations on power-line conductors
Godard, Bertrand; Guérard, Suzanne ULg; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (2011), 26(4), 2111-2117

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Vortex shedding is characterized by vibration frequencies in the approximate range of 3-100 Hz (sometimes higher) and by ... [more ▼]

Aeolian vibrations of power lines are induced by Von Karman vortex shedding. Vortex shedding is characterized by vibration frequencies in the approximate range of 3-100 Hz (sometimes higher) and by amplitudes that can reach conductor diameter for the lower range of frequencies, under very slow to medium wind speed (0.5 m/s to about 7 m/s). Conductor vibration causes localized bending, which may cause fatigue failure of the conductor strands. The amplitude of vibration very much depends on conductor self damping, which may be very low. The purpose of this paper to show measurements of these vibrations carried out by a new experimental device (developed by the authors), which is able to perform continuous measurements in the full range of frequencies and amplitudes. A statistical overview of measurements is presented and Lifetime is estimated. [less ▲]

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See detailUprating Transmission Lines through the use of an innovative real-time monitoring system
CLOET, Eric; Lilien, Jean-Louis ULg

in Proceedings of the 12th International Conference & Exposition on Transmission & Distribution, Operation & Live-Line Maintenance of the World's Power Delivery Systems (2011, May)

This paper describes a brand new method of real-time monitoring of overhead transmission lines. The method makes use of what is called the “Ampacimon” system. The system uses an Ampacimon module, which is ... [more ▼]

This paper describes a brand new method of real-time monitoring of overhead transmission lines. The method makes use of what is called the “Ampacimon” system. The system uses an Ampacimon module, which is a real time monitoring device that deduces the sag by vibration analysis without the need for any line data or environmental data. The Ampacimon system has been proven to be accurate within a sag error margin of ±2%. [less ▲]

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See detailHow to use existing power lines to evacuate twice as much wind power ?
Nguyen, Huu-Minh ULg; lambin, jean-jacques; Lilien, Jean-Louis ULg

Poster (2011, March)

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See detailHow as a transmission system operator (TSO) to respond to the growing public concern on the potential health effects of ELF exposure ?
Du Four, Vincent; Ledent, Maryse ULg; Lilien, Jean-Louis ULg et al

in Proceedings of the 2d International Conference on Extremely Low Frequency Electric and Magnetic fields (2011, March)

Public exposure of extremely low frequency (50 Hz) electric and magnetic fields are a major concern for transmission system operators.Measurements are presented as well as technical solutions to reduce ... [more ▼]

Public exposure of extremely low frequency (50 Hz) electric and magnetic fields are a major concern for transmission system operators.Measurements are presented as well as technical solutions to reduce ELF and public acceptance are discussed. [less ▲]

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See detailHow to use existing power lines to evacuate twice as much wind power ?
Lilien, Jean-Louis ULg

Conference (2010, August)

smart sensors to develop dynamic line rating

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See detailExperiences of the Belgian and French TSOs using the “Ampacimon” real-time dynamic rating system
Cloet, Eric; Lilien, Jean-Louis ULg; Ferrières, Patrick

in Conférence Internationale des grands réseaux électriques à haute tension (2010, August)

Dynamic line rating as used in France and Belgium using Ampacimon technology

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See detailNOnlinear finite element approach to simulate wake-induced oscillation in transmission system
Snegovskiy, Dmitry; Lilien, Jean-Louis ULg

in Proceedings of ASME 2010 3rd Joint US-euorpean Fluids Engineering (FEDSM2010) (2010, August)

Wake-induced oscillations (WIO) in transmission line bundle conductors are simulated using finite-element nonlinear formulation. This allows obtaining the conductor oscillations in the line spans equipped ... [more ▼]

Wake-induced oscillations (WIO) in transmission line bundle conductors are simulated using finite-element nonlinear formulation. This allows obtaining the conductor oscillations in the line spans equipped either with spacers or with spacer dampers. Within this approach, the interaction of subconductors due to the wake is represented using Simpson’s aeroelastic model. A special force element is created to introduce the aerodynamic loads due to the wake. The aeroelastic properties of the wake force field are tuned to meet the wake-induced instability properties as measured by Price. Extension of the wake interaction sample onto the full line span is done taking into account the inertia-stiffness properties of the line fittings (spacer dampers). It is emphasized that in WIO the ability of spacer (spacer damper) to transfer the loads and motions plays essential role. Thus, the transfer matrix logic to simulate the spacer, established by Diana, Rawlins and other researchers, is now transferred into the finite element model of WIO. Some important structural specifics of transmission line fittings are thus highlighted by the performed simulations. All these developments are introduced into the FE package SAMCEF Mecano. Results of a series of calculations are presented to illustrate the feasibility of the established model. Comparison of FEM simulations to the benchmarking field test data is presented. [less ▲]

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