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View article: Probabilistic Estimation of During-Fault Voltages of Unbalanced Active Distribution: Methods and Tools
Probabilistic Estimation of During-Fault Voltages of Unbalanced Active Distribution: Methods and Tools Open
In low-voltage (LV) distribution networks, system operating conditions are always unbalanced due to the unpredictability of the load demand in each phase, coupled with a potentially asymmetrical network structure due to different phase con…
View article: On the Aggregated Modelling of Large-Scale Wind Farms for Harmonic Studies
On the Aggregated Modelling of Large-Scale Wind Farms for Harmonic Studies Open
In this paper, the aggregated modelling of large-scalewind farms for harmonic studies is considered. The limitations of the harmonic emission assessment based on the IEC 61000-3-6 summation rule are analysed in a probabilistic framework. A…
View article: Modeling and Control of AC Microgrids Under Unbalanced Utility Grid Voltage Using the Invariant-Ellipsoid Method
Modeling and Control of AC Microgrids Under Unbalanced Utility Grid Voltage Using the Invariant-Ellipsoid Method Open
The increasing penetration of renewable microgrids (MGs) into utility grids (UGs) has introduced new stability and power quality challenges, especially under the unbalanced voltage of the utility grid. This paper presents a novel approach …
View article: Harmonic and Supra-Harmonic Emissions of Electric Vehicle Chargers: Modeling and Cumulative Impact Indices
Harmonic and Supra-Harmonic Emissions of Electric Vehicle Chargers: Modeling and Cumulative Impact Indices Open
The analysis of power quality disturbances in distribution systems has gained significance with the diffusion of electric vehicles (EVs). Waveform distortions are interesting since EV currents introduce distortions with spectral components…
View article: Measured Rare Voltage Sags and Clusters of Sags: Prediction Models Driven by the Intermittence Indices
Measured Rare Voltage Sags and Clusters of Sags: Prediction Models Driven by the Intermittence Indices Open
The field measurement campaigns have revealed that voltage sags also occur as clusters and not only as rare phenomena. The clusters of sags represent a stochastic process due to their time dependence; the rare satisfy the requirements for …
View article: Cosine Windows in Interpolated DFT-based Method for an Accurate High-Frequency Distortion Assessment in Power Systems
Cosine Windows in Interpolated DFT-based Method for an Accurate High-Frequency Distortion Assessment in Power Systems Open
The transformation of electrical networks in the context of the new smart grid paradigm unavoidably involves new challenges regarding Power Quality (PQ) disturbances not only for customers but also for all the other involved stakeholders. …
View article: Editorial Special Section on “Power Quality in the Energy Transition: Selected Papers From ICHQP 2022”
Editorial Special Section on “Power Quality in the Energy Transition: Selected Papers From ICHQP 2022” Open
Electrical power quality is a vital aspect when designing or assessing the operation of all modern power systems and forms an important part of the ongoing energy transition to more efficient and multi-vector systems. However, the ongoing …
View article: Air Force Pilot Expertise Assessment during Unusual Attitude Recovery Flight
Air Force Pilot Expertise Assessment during Unusual Attitude Recovery Flight Open
Pilot training and expertise are key aspects in aviation. A traditional way of evaluating pilot expertise is to measure performance output. However, this approach provides a narrow view of the pilot’s capacity, especially with regard to me…
View article: Initial Results of an Extensive, Long-Term Study of the Forecasting of Voltage Sags
Initial Results of an Extensive, Long-Term Study of the Forecasting of Voltage Sags Open
This paper presents the preliminary results of our research activity aimed at forecasting the number of voltage sags in distribution networks. The final goal of the research is to develop proper algorithms that the network operators could …
View article: Planning of Distributed Energy Storage Systems in μGrids Accounting for Voltage Dips
Planning of Distributed Energy Storage Systems in μGrids Accounting for Voltage Dips Open
This paper deals with the optimal planning of the electrical energy storage systems in the microgrids aimed at cost minimization. The optimization accounts for the compensation of the voltage dips performed by the energy storage systems. A…
View article: Probabilistic Estimation of the Energy Consumption and Performance of the Lighting Systems of Road Tunnels for Investment Decision Making
Probabilistic Estimation of the Energy Consumption and Performance of the Lighting Systems of Road Tunnels for Investment Decision Making Open
This paper presents a probabilistic model for supporting the process of decision making about the value of new lighting systems in existing road tunnels when some data and parameters are affected by uncertainty. The proposed model, which w…
View article: Effects of Voltage Dips on Robotic Grasping
Effects of Voltage Dips on Robotic Grasping Open
This paper addresses the effects of electric power quality on robotic operations. A general overview is reported to highlight the main characteristics of electric power quality and it’s effects on a powered system by considering an end-use…
View article: Effects of Voltage Dips on Robotic Grasping
Effects of Voltage Dips on Robotic Grasping Open
This paper addresses the effects of electric power quality on robotics operation. A general overview is reported to highlight the main characteristics of electric power quality and their effects on a powered system by considering an end-us…
View article: Voltage sag estimation of real transmission systems for faults along the lines
Voltage sag estimation of real transmission systems for faults along the lines Open
In this paper, we dealt with the problem of the voltage sags due to faults along the lines using the Fault Position Method (FPM). The objective of the study was to demonstrate that for actual transmission systems the FPM can be used in a v…
View article: Comparison of methods using only voltage measurements for detecting the origin of voltage sags in the modern distribution networks
Comparison of methods using only voltage measurements for detecting the origin of voltage sags in the modern distribution networks Open
In this paper, we analysed two methods, M1 and M2, for determining in which network the voltage sags originated. The problem referred to the High Voltage (HV) and Medium Voltage (MV) systems interconnected by HV/MV stations. The methods we…
View article: Energy Planning with Air Pollution Constraints
Energy Planning with Air Pollution Constraints Open
Electrical energy planning of modern electric power system requires great attention for the air pollution problem. This is in accordance to the increasing tendency to optimise the production processes in the respect of their sustainability…
View article: Impact of Distributed Generation on the Voltage Sag Performance of Transmission Systems
Impact of Distributed Generation on the Voltage Sag Performance of Transmission Systems Open
In this paper, we analysed the growing penetration of generating units from renewable energy sources in transmission power systems. Among the possible effects of the interaction of distributed generation (DG) with transmission systems, we …
View article: Tools for Assessing the Robustness of Electrical System against Voltage Dips in terms of Amplitude, Duration and Frequency
Tools for Assessing the Robustness of Electrical System against Voltage Dips in terms of Amplitude, Duration and Frequency Open
The method of fault position is useful for characterizing power-system performance in the presence of voltage dips due to faults. It is based on short-circuit simulations repeated for all the system nodes and for many points along the syst…