A5058303973- Advanced Electrical Measurement Techniques
- Power Quality and Harmonics
- Sensor Technology and Measurement Systems
- Magnetic Properties and Applications
- Power Line Communications and Noise
- Electromagnetic Compatibility and Noise Suppression
- Railway Systems and Energy Efficiency
- Non-Destructive Testing Techniques
- Electrical Contact Performance and Analysis
- Network Time Synchronization Technologies
- Advancements in PLL and VCO Technologies
- Power Transformer Diagnostics and Insulation
- Electrostatic Discharge in Electronics
- Advanced Battery Technologies Research
- Smart Grid Energy Management
- Analog and Mixed-Signal Circuit Design
- Energy Efficient Wireless Sensor Networks
- Microbial Metabolic Engineering and Bioproduction
- Magnetic Field Sensors Techniques
- Fault Detection and Control Systems
- Smart Grid Security and Resilience
- Power Systems Fault Detection
- Fungal and yeast genetics research
- Power System Optimization and Stability
- Advanced MEMS and NEMS Technologies
University of Campania "Luigi Vanvitelli"
2016-2025
Costruzioni Apparecchiature Elettroniche Nucleari (Italy)
2024
Ricerca sul Sistema Energetico (Italy)
2024
Istituto Nazionale di Ricerca Metrologica
2024
Azienda Ospedaliera Universitaria Università degli Studi della Campania Luigi Vanvitelli
2018-2023
University of Salerno
2010-2023
Polytechnic University of Turin
2020
University of Naples Federico II
2008-2013
Informa (Italy)
2010
Università degli studi di Cassino e del Lazio Meridionale
2010
This paper aims at characterizing and improving the metrological performances of current voltage instrument transformers (CTs VTs) in harmonic measurements power system. A theoretical analysis is carried out to demonstrate that, due iron core nonlinearity, CT VT output signal distorted even when input a pure sine wave. Starting from this analysis, new method for characterization compensation proposed. In first step, they are characterized sinusoidal conditions phasors measured; second these...
Nowadays, the interest in low-cost and increasingly accurate phasor measurement units (PMUs) for active distribution systems is steadily growing. In this paper, an algorithm synchrophasor, fundamental frequency, rate of change frequency estimation tailored processing platforms with limited computational resources described characterized extensively terms both accuracy time. The proposed solution harnesses main advantages two state-of-the-art algorithms, i.e., interpolated discrete Fourier...
The assessment of the power quality (PQ) could be a valuable tool to foster efficiency railway systems. PQ is well-addressed topic in conventional ac 50/60 Hz systems, and many procedures, algorithms measurement systems were presented international standards widely discussed scientific literature. A less explored research field traction supply particular with reference dc 16.7 article explores this theme, proposing an extension definitions standard procedures for some main indexes, well...
A setup for the measurement of frequency response voltage transformers under actual waveform conditions is presented. It based on a two-step procedure that makes use high gas insulated capacitors and digital bridge. allows calibrations using distorted waveforms, with fundamental tone at medium level superimposed harmonics up to 20% 15 kHz. Combined standard uncertainty in transformer (VT) error estimated 200 μV/V ratio 300 μrad phase displacement 10 First applications VTs different rated...
The advance in power electronics causes, over the years, an increasing diffusion of nonlinear loads. Moreover, electrical generation systems are going to include a growing amount solar and wind energy, characterized by time-variant flow energy and, very often, with relevant distortion. These aspects give more emphasis monitoring conducted disturbances on wide frequency range, consequently, voltage current transducers adopted for this aim must have proper bandwidth. Voltage transformers (VTs)...
Microbial population dynamics in bioreactors depend on both nutrients availability and changes the growth environment. Research is still ongoing optimization of bioreactor yields focusing increase maximum achievable cell density.A new process-based model proposed to describe aerobic Saccharomyces cerevisiae cultured glucose as carbon energy source. The considers main metabolic routes assimilation (fermentation ethanol respiration) occurrence inhibition due accumulation other self-produced...
The electrical arc occurring in the sliding contact between supply line and current collector (pantograph) of an locomotive is a fast transient phenomenon able to degrade progressively line-to-pantograph quality and, consequently, continuity operation. In order increase energy efficiency railway system, inexpensive solution constituted by detection event analysis voltage measurements already available on-board train. An essential activity reach this objective set up reliable model system...
The integration of renewable energy sources on a large scale in the electrical distribution systems, as well widespread non-linear loads, has led to significant increase power quality (PQ) disturbances. For this reason, PQ monitoring is also becoming key task medium voltage (MV) grids. measurement at MV levels can only be performed using instrument transformers (ITs) down level and current suitable for input stage instruments. However, no international standards currently require...
Extracellular DNA (exDNA) can be actively released by living cells and different putative functions have been attributed to it. Further, homologous exDNA has reported exert species-specific inhibitory effects on several organisms. Here, we demonstrate experimental evidence, including 1H-NMR metabolomic fingerprint, that the growth rate decline in Saccharomyces cerevisiae fed-batch cultures is determined accumulation of medium. Sequencing such secreted represents a portion entire genome,...
Today there is a wide application of different electronic apparatus that both produce electromagnetic disturbances on the supply power system and are sensitive to them. Power present typical electric utility distribution systems degrade product quality, increase process downtime, dissatisfy commercial customers. For these reasons, monitoring quality networks has become an issue international interest. To monitor in this paper, we propose digital measurement station. Its main features remote...
In this paper, the authors propose a methodology to guide verification of single-phase energy meters under sinusoidal and nonsinusoidal conditions. At first, brief review is presented about definitions quantities that should be measured or monitored for revenue purposes their relationship with electrical are recognized important in terms metering accuracy. Then, design an experiment allows testing combination disturbances showing positive negative correlations described. Finally, hardware...
Calibration of electrical energy meters is coming up as a metrological concern. The latest European Union (EU) directives about measuring instruments adopted for commercial transactions state that their accuracy has to be verified in actual operating conditions. This requirement leaving all laboratories involved meter calibration serious difficulty because this kind verification is, at the moment, still not fully developed or even clarified aspects. In paper, measurement equipment presented....
In this paper, the design and prototype implementation of a power-quality (PQ) measuring monitoring instrument based on an embedded controller with reconfigurable I/O are described. The performs calculation main PQ indexes according to latest standards, it can be reconfigured for future standard developments. It is properly implemented operate in stand-alone mode, interfaced hardware modules exchange information data, locally, RS-232 connection or, remotely, Transmission Control...
This paper analyzes the accuracy of algorithms commonly adopted in instruments devoted to detection and characterization voltage dips (which are also called sags). analysis is particularly interesting, because results dip measurements utilized for calculation severity levels site indexes, which important parameters not only assessment quality level power supply but selection equipment with proper intrinsic immunity. Instruments measurement still have unresolved technical theoretical issues...
This paper reports the results of analyses on accuracy algorithms commonly adopted in instruments devoted to detection and characterization voltage dips (also called sags). analysis is particularly interesting because dip measurements are used for calculation severity levels site indexes that important parameters assessment quality level power supply but also selecting equipment with proper intrinsic immunity. Anyway, measurement still have unresolved technical theoretical issues related...
With the advent of smart grid paradigm, medium voltage (MV) distribution networks have experienced great structural changes that, with massive deployment distributed generation, impose network monitoring in a wider frequency range, up to some kilohertz, evaluate power quality (PQ) phenomena and ensure proper operation. Classical instrument transformers (VT) primary rated voltages higher than few tens kilovolt are typically usable limited range around frequency, thus for accurate measurements...
Instrument Transformers (ITs) are essential devices for all the measurement tasks, f.i. metering, protection and diagnostics, in electricity grids, since they scale voltage current down to levels compatible with measuring instruments. At input of Power Quality (PQ) instruments Phasor Measurement Units (PMUs), inductive transformers (VTs CTs) still most used ITs, even if, their performance presence disturbances is not fully assessed. This paper analyses impact CTs on fundamental...
This paper presents a digital instrument for the power quality analysis in systems where voltage or current waveforms are non-sinusoidal. It is based on C40 DSP and special high-speed data acquisition system. The performed by recursive algorithm which allows mutable system properties to be tracked. also goes discuss performance of an prototype, both terms accuracy specifications speed measurement.
The smart grid approach is envisioned to take advantage of all available modern technologies in transforming the current power system provide benefits stakeholders fields efficient energy utilisation and wide integration renewable sources. Energy storage systems could help solve some issues that stem from usage terms stabilizing intermittent production, quality peak mitigation. With into grids, their accurate modeling becomes a necessity, order gain robust real-time control on network,...
This paper presents a real-time compensation method for the improvement of frequency behavior measurement transducers already operating or to be installed in transmission and distribution grids. The developed technique relies on identification an infinite impulse response digital filter with complex equal inverse transducer, whose parameters are evaluated through hybrid scheme based combination stochastic deterministic procedure. Attention is focused algorithm capability, sensitivity...
Smarter sensors and transducers are required in the new smart grid scenario with increased performances, terms of high accuracy wide frequency bandwidth. Traditional calibration systems, developed for conventional instrument transformers not suitable performance verification types non-conventional transformers, both input range Therefore, a industrial comparator sensor is presented this paper, which intended voltage current from dc to tens kilohertz. Its performances allow calibration,...
Similar to low-voltage power systems, also in medium voltage networks there is a growing need for quality (PQ) analyses, required by the increasing diffusion of distributed generation sources equipped with switching converters. This leads employment transducers and measurement techniques able convert acquire signals better accuracy on wider frequency range than conventional current instrument transformers. Voltage dividers (VDs) are expected become most used PQ assessments, since, respect...
In PV applications, under mismatching conditions, it is necessary to adopt a maximum power point tracking (MPPT) technique which able regulate not only the voltages of modules array but also DC input voltage inverter. Such can be considered hybrid MPPT (HMPPT) since neither distributed on or centralized at this paper new HMPPT presented and discussed. Its main advantages are high efficiency speed obtained by means fast estimate optimal values inverter voltage. The compared with simple...