scholarly journals Characterization Procedure for Stand-Alone Merging Units Based on Hardware-in-the-Loop Technology

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1993
Author(s):  
Alessandro Mingotti ◽  
Federica Costa ◽  
Lorenzo Peretto ◽  
Roberto Tinarelli
Keyword(s):  
Distributed System ◽  
Electronic Devices ◽  
Hardware In The Loop ◽  
Medium Voltage ◽  
Merging Unit ◽  
Measurement Devices ◽  
Characterization Procedure ◽  
Power Measurements ◽  
Intelligent Electronic Devices ◽  
Metrological Performance

The digitalization of a medium voltage network requires huge efforts from distributed system operators and electric utilities. The main reason is attributed to the costs associated with the replacement or introduction of new intelligent electronic devices capable of collecting and digitalizing current and voltage measurements. To this purpose, this paper introduces a new idea of a stand-alone merging unit (SAMU), which features real-time and hardware-in-the-loop technology, completed with accurate voltage and current sensors. Furthermore, the characterization procedure that allows an evaluation of the metrological performance of a complex device, such as a SAMU, is fully described. From the results, it is highlighted that (i) the developed SAMU is capable of performing highly accurate voltage, current, and power measurements; (ii) the characterization procedure is simple and exploitable for all kinds of SAMUs and other synchronized measurement devices.

scholarly journals Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1719
Author(s):  
Alessandro Mingotti ◽  
Federica Costa ◽  
Gaetano Pasini ◽  
Lorenzo Peretto ◽  
Roberto Tinarelli
Keyword(s):  
High Frequency ◽  
Renewable Energy Sources ◽  
Electronic Devices ◽  
Measurement Instruments ◽  
Voltage Measurement ◽  
Voltage Transformer ◽  
Medium Voltage ◽  
Wide Range ◽  
Power Frequency ◽  
Intelligent Electronic Devices

The use of capacitive dividers (CDs) in medium-voltage (MV) networks started as simple voltage detectors and as rough voltage measurement instruments for protective purposes. Now, with the spread of intelligent electronic devices and renewable energy sources at the distribution level, capacitive dividers are designed and installed to perform accurate voltage measurements. Such a requirement is mandatory when the power quality has to be assessed. Therefore, CDs are currently being used either for power frequency or for high-frequency (supraharmonic- or partial-discharge-level) measurements. In this paper, typical off-the-shelf CDs are studied and modeled to understand how they behave in a wide range of frequencies and when the temperature varies. To this purpose, specific setups and tests have been developed and performed. From the results, it is clear that with proper modeling of CDs, it is possible to exploit them for measuring phenomena in a wide range of frequencies, including the effects due to temperature variations and self-resonances.

scholarly journals Optimization of IEDs Position in MV Smart Grids through Integer Linear Programming

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3346
Author(s):  
Francesco Bonavolontà ◽  
Vincenzo Caragallo ◽  
Alessandro Fatica ◽  
Annalisa Liccardo ◽  
Adriano Masone ◽  
...  
Keyword(s):  
Linear Programming ◽  
Integer Linear Programming ◽  
Smart Grids ◽  
Electronic Devices ◽  
Circuit Breaker ◽  
Computational Effort ◽  
Optimal Position ◽  
Medium Voltage ◽  
The One ◽  
Intelligent Electronic Devices

In the paper, an analytical method for determining the optimal positioning of intelligent electronic devices in medium voltage grids is proposed. Intelligent electronic devices are automated devices able to communicate one with each other and command the circuit breaker in order to localize and isolate a line fault as fast as possible. However, the number of intelligent electronic devices to install has to be limited, due to the relevant installation costs and the reduction in the transmission bandwidth caused by the increased number of exchanged messages. So, the electrical distributor has to carefully detect the nodes of the grid where the intelligent electronic devices have to be installed. The authors propose a method based on integer linear programming, which, given the number of intelligent electronic devices to install, finds their optimal position, i.e., the one that minimizes the penalties associated with the power down experienced by customers. In order to highlight the offered advantages in terms of computational effort, the proposed approach has been assessed with a real medium voltage grid.

scholarly journals New Sensor for Medium- and High-Voltage Measurement

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4654
Author(s):  
Andrzej Wetula ◽  
Andrzej Bień ◽  
Mrunal Parekh
Keyword(s):  
Finite Element Method ◽  
Electronic Devices ◽  
Finite Element Method Simulation ◽  
Laboratory Model ◽  
Power Electronic ◽  
Proof Of Concept ◽  
Voltage Measurement ◽  
Medium Voltage ◽  
Narrow Frequency Band ◽  
Further Development

Measurements of medium and high voltages in a power grid are normally performed with large and bulky voltage transformers or capacitive dividers. Besides installation problems, these devices operate in a relatively narrow frequency band, which limits their usability in modern systems that are saturated with power electronic devices. A sensor that can be installed directly on a wire and can operate without a galvanic connection to the ground may be used as an alternative voltage measurement device. This type of voltage sensor can complement current sensors installed on a wire, forming a complete power acquisition system. This paper presents such a sensor. Our sensor is built using two dielectric elements with different permeability coefficients. A finite element method simulation is used to estimate the parameters of a constructed sensor. Besides simulations, a laboratory model of a sensor was built and tested in a medium-voltage substation. Our results provide a proof of concept for the presented sensor. Some errors in voltage reconstruction have been traced to an oversimplified data acquisition and transmission system, which has to be improved during the further development of the sensor.

An Improvement of IED Configuration Tool and Modeling for Transformer Condition Monitoring IED

2014 ◽  
Vol 519-520 ◽  
pp. 1309-1312
Author(s):  
De Wen Wang ◽  
Ru Kun Liu
Keyword(s):  
Condition Monitoring ◽  
Design Method ◽  
Electronic Devices ◽  
Object Oriented ◽  
Description Language ◽  
Control Block ◽  
Iec 61850 ◽  
Modeling Technology ◽  
Data Object ◽  
Intelligent Electronic Devices

This paper analyzes the object-oriented modeling technology of IEC 61850 standard and the modeling steps of condition monitoring intelligent electronic devices (IED). Aiming at the problem of the existing configuration tools poor scalability for the IEC 61850 standard, a new design method of the IED configuration tool is brought up. Information model of transformer condition monitoring IED is established including logical device (LD), logical node (LN), data object (DO), data attribute (DA), dataset and report control block with the method mentioned above, and described with substation configuration description language.

scholarly journals Special Issue on Intelligent Electronic Devices

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 645
Author(s):  
Teen-Hang Meen ◽  
Wenbing Zhao ◽  
Cheng-Fu Yang
Keyword(s):  
South Korea ◽  
Scientific Knowledge ◽  
Electronic Devices ◽  
Special Issue ◽  
International Conference ◽  
Knowledge Innovation ◽  
Innovation And Invention ◽  
Intelligent Electronic Devices ◽  
Ieee International Conference ◽  
Theoretical Results

The second IEEE International Conference on Knowledge Innovation and Invention 2019 (IEEE ICKII 2019) was held in Seoul, South Korea, 12–15 July 2019. This special issue “Intelligent Electronic Devices” selects 13 excellent papers form 260 papers presented in IEEE ICKII 2019 conference about the topics of Intelligent Electronic Devices. The main goals of this special issue are to encourage scientists to publish their experimental and theoretical results in as much detail as possible, and to discover new scientific knowledge relevant to the topics of electronics.

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