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Energies
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Distributed Measurement Systems Applied to Modern Electric Distribution Grids II
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Distributed Measurement Systems Applied to Modern Electric Distribution Grids II

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A1: Smart Grids and Microgrids".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 2030

Special Issue Editors

Dr. Sara Sulis

E-Mail Website
Guest Editor
Department of Electrical and Electronic Engineering, University of Cagliari, 09123 Cagliari, Italy
Interests: electrical and electronic measurements; distributed measurement systems; power system measurements; distribution networks; smart grids; measurement uncertainty and propagation analysis; distribution system state estimation; harmonic source estimation; fault location; power quality; power system harmonics; phasor measurement unit (PMU); wide-area measurement system (WAMS); smart metering
Special Issues, Collections and Topics in MDPI journals
Dr. Paolo Castello

E-Mail Website
Guest Editor
Department of Electrical and Electronic Engineering, University of Cagliari, 09123 Cagliari, Italy
Interests: measurements for modern power networks; phasor measurement unit (PMU); phasor data concentrator (PDC); algorithms for synchrophasors estimation; characterization and testing of PMU under steady-state and dynamic conditions; wide-area measurement system (WAMS) based on synchronized measurements
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Significant changes are occurring in electric power systems. The deregulation of the energy market allowed a variety of participants to buy and sell electricity. Massive and unplanned penetration of generation units and new loads/prosumers connected to both medium and low voltage levels is ongoing. Traditional monitoring, management, and protection schemes will no longer be suitable for modern grids. These require new solutions for the appropriate management and control of the electric infrastructure, dynamically facing challenging operating conditions.

The challenges the new distributed measurement system must face are countless. Innovative solutions for measurement data collection, processing, communication, storage, access, and handling are expected. In recent decades, academic and industrial research projects have been relentlessly carried out looking at the next generation of electric grids. For example, it is possible to highlight how research is pushing to extend the benefits of synchronized measurements to distribution networks, for the evaluation of the quantities of interest, like power quality indexes, in PMU-like devices.

This Special Issue will present concepts, algorithms, technologies, and applications that will help distributed measurement systems contribute to the realization of smart grid scenarios.

More specifically, topics of interest for this Special Issue include (but are not limited to) the following:

  • Distributed measurement architectures for monitoring, management, and protection
  • Synchronized measurements and applications
  • Power quality monitoring
  • Advanced metering infrastructures
  • Smart metering
  • Meter placement
  • Management of distributed energy resources, energy storage systems, and islanding
  • Information and communication technologies for smart grids applications
  • Integration of SCADA/EMS tools
  • Demand-side management
  • Cloud-based solutions

Dr. Sara Sulis
Dr. Paolo Castello
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • distribution grids
  • smart grids
  • microgrids
  • smart meters
  • power quality
  • management, control, and protection
  • distributed generation
  • synchronized measurements, PMU
  • meter placement

Published Papers (2 papers)

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Research

13 pages, 4398 KiB  
Article
The Reference Wideband Inductive Current Transformer
by Michal Kaczmarek, Piotr Kaczmarek and Ernest Stano
Energies 2023, 16(21), 7307; https://doi.org/10.3390/en16217307 - 28 Oct 2023
Cited by 1 | Viewed by 579
Abstract
The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation accuracy of inductive [...] Read more.
The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation accuracy of inductive current transformers for harmonics of distorted current. This device ensures 5 A and 1 A RMS secondary currents to provide the opportunity to use the differential measuring setup. Such solutions are characterized by the significantly reduced measurement uncertainty in relation to the comparative measurements made between two current/voltage channels. The problems required to ensure the high wideband transformation accuracy, including the self-generation phenomenon of the low order higher harmonics to the secondary current and a too-low frequency range of operation, were overcome in the design process. The values of its ratio error and the phase displacement of the developed reference wideband inductive current transformer did not exceed ±0.2%/° up to 1 kHz, ±0.4%/° from 1 kHz up to 1.5 kHz and ±0.5%/° from 1.5 kHz up to 3 kHz, as is required to perform the test procedure in accordance with the optional requirements for the inductive current transformers defined in the new edition of the standard IEC 61869-1. Full article
(This article belongs to the Special Issue Distributed Measurement Systems Applied to Modern Electric Distribution Grids II)
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23 pages, 3143 KiB  
Article
An Optimization of Least-Square Harmonic Phasor Estimators in Presence of Multi-Interference and Harmonic Frequency Variance
by Dongfang Zhao, Fuping Wang, Shisong Li, Wei Zhao, Lei Chen, Songling Huang, Shen Wang and Haitao Li
Energies 2023, 16(8), 3397; https://doi.org/10.3390/en16083397 - 12 Apr 2023
Cited by 5 | Viewed by 1118
Abstract
The wide application of power electronic devices brings an increasing amount of undesired harmonic and interharmonic tones, and accurate harmonic phasor estimation under a complex signal input is an important task for smart grid applications. In this paper, an optimization of least-square dynamic [...] Read more.
The wide application of power electronic devices brings an increasing amount of undesired harmonic and interharmonic tones, and accurate harmonic phasor estimation under a complex signal input is an important task for smart grid applications. In this paper, an optimization of least-square dynamic harmonic phasor estimators, considering multi-interference and harmonic frequency variance, is proposed. A comprehensive error index (CEI) composed of the fundamental-leakage-led harmonic amplitude estimation error, harmonic mutual interference, out-of-band interference, and harmonic frequency deviation is employed. The largest CEI part of least-square algorithms using three different signal decomposition models is analyzed for the first time, and variables to reduce this error component are then introduced using singular value decomposition. With the CEI and defined variables, a minimum-error estimation of harmonic phasors under various interference and harmonic frequency change is discussed. Numerical tests are performed, and the test results show that after the proposed optimization is applied to least-square algorithms, the harmonic phasor estimation errors are considerably reduced, especially for low-order harmonics. We also show the possibility of choosing desired optimal phasor filter design by balancing the measurement accuracy and data latency. For example, when the window length is set to three nominal cycles, the proposed optimization can yield both good accuracy and fast measurement speed for estimating harmonic phasors under multi-interference and harmonic frequency variance. Full article
(This article belongs to the Special Issue Distributed Measurement Systems Applied to Modern Electric Distribution Grids II)
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