A5088123895- Advanced Electrical Measurement Techniques
- Thermal Analysis in Power Transmission
- High voltage insulation and dielectric phenomena
- Lightning and Electromagnetic Phenomena
- Electrical Fault Detection and Protection
- Non-Destructive Testing Techniques
- Electrical and Bioimpedance Tomography
- Scientific Measurement and Uncertainty Evaluation
- Power Transformer Diagnostics and Insulation
- Power Line Communications and Noise
- Magnetic Properties and Applications
- Sensor Technology and Measurement Systems
- Magnetic Field Sensors Techniques
- Advanced Sensor Technologies Research
- Power Quality and Harmonics
- Railway Systems and Energy Efficiency
- Islanding Detection in Power Systems
- Microgrid Control and Optimization
- Wireless Sensor Networks for Data Analysis
- Magneto-Optical Properties and Applications
- Power Systems Fault Detection
- Physics and Engineering Research Articles
- Multilevel Inverters and Converters
Fundación para el Fomento de la Innovación Industrial
2017-2024
Foundation for the Research Development and Application of Composite Materials
2017-2023
Leitat Technological Center
2023
Technology Centre Prague
2019
National University of Mar del Plata
2006
The increasing integration of power electronics and renewable energy sources in modern electrical grids has introduced new challenges medium voltage transformer calibration, particularly the frequency range from 9 kHz to 150 kHz. Accurate traceable calibration methods are essential ensure reliable measurement grids, where quality compliance with IEC 61869-1:2024 standards critical. This study presents advancements development techniques for transformers operating within this range. approach...
The most important advantage of voltage dividers over traditional transformers is that do not have an iron core with non-linear hysteresis characteristics. a linear behavior respect to over-voltages and flat frequency response larger range. weak point divider the influence external high-voltage (HV) earth parts in its vicinity. Electrical fields arising from high voltages neighboring phases ground conductors structures are one their main sources for systematic measurement errors. This paper...
The insulation condition of HVDC grids consisting cable systems, GIS, and converters should be monitored by partial discharge (PD) analysers using artificial intelligence (AI) tools for efficient diagnosis. Although there are many experiences PD monitoring solutions developed the supervision HVAC analysers, no standardised requirements their qualification available yet. international technical specification TS IEC 62478 provides general rules measurements electromagnetic methods but does not...
Phase-controlled operation of thyristor power rectifiers requires instantaneous phase information the fundamental component grid voltage in order to generate proper gating sequence. In many high-power, high-precision applications, such as driving bending magnets large particle accelerators, converters are fed from a local grid, which produces significant frequency variations and notches superimposed sinusoidal AC due commutation interval. These strong disturbances impose some difficulties...
This paper presents a method for detecting different types of defects in the cable sheaths interconnected cross bonding configuration HV system installed flat or trefoil layout using sheath currents as input data. Three have been analyzed: electric continuity loss earth connection, short-circuit between sectionalized metal joint and link-box flooding. The current has calculated by two approaches, one on basis theoretical equations, programed MATLAB® other ATP software simulating model....
On-site partial discharge (PD) measurements have turned out to be a very efficient technique for determining the insulation condition in high-voltage electrical grids (AIS, cable systems, GIS, HVDC converters, etc.); however, there is not any standardised procedure performances of PD measuring systems. In on-line and on-site measurements, high-frequency current transformers (HFCTs) are commonly used as sensors they allow monitoring over long distances installations. To ensure required...
Current standard EN 50463-2 indicates the tests and requirements to be satisfied for an energy measurement system of a traction unit railway applications. Some these are done with several harmonics superposed on rated voltage, respectively current. However, no calibration systems satisfying were available few years ago. The work performed in EURAMET project “MyRailS” leads development fictive power sources reference described this paper. Therefore, it is possible generate distorted 25 kV-50...
The aim of this paper is to describe a new reference set-up developed for laboratory and on-board calibrations the Energy Measuring Systems (EMS) installed in locomotives AC supplies, which includes voltage current transducers power energy measurements. generation system able generate phantom distorted regimes with frequency content from fundamental (16.7 or 50 Hz) up 5 kHz (harmonics, inter-harmonics sub-harmonics) 25 kV 500 A. systems shall be calibrate commercial EMS designed 15 kV-16.7...
Coaxial cables of about ten meters in length are commonly used high voltage laboratories to interconnect lightning impulse dividers output the digital recorder located control room. Common practice testing is check characteristic impedance measuring coaxial cable analyse if it matched low arm divider and instrument. In addition, shielding must also be checked proof immunity against interference signals, specially, when disruptive a discharge occurs. Although not usual consider signal...
This paper describes the design and characterization of test cells developed to generate a reference data bank partial discharge (PD) series. The PD signals reproduced in these are useful for evaluation AC DC diagnosis instruments. Technical functionalities such as sensitivity, clustering source recognition can be checked using cells. A testing procedure detect existence specific defect HVDC installations is proposed. work part task European co-funded project on metrology 15NRM02-UHV-EMPIR,...
Traditionally, high voltage (HV) laboratories have required different measuring instruments to measure alternating voltages 50/60 Hz (AC), using peak voltmeters, lightning impulses, through meters or oscilloscopes and the apparent charge, by means of partial discharge (PD) instruments. All them with very technical requirements stablished in applicable hardware software standards (IEC 61083 series [1], IEC 60060 [2, 3] 60270 [4]). However, technological evolution has allowed these...