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Keywords = high-voltage subtransmission network

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19 pages, 16583 KiB  
Article
Assessment of Renewable Acceptance by Electric Network Development Exploiting Operation Islands
by Enrico Maria Carlini, Alfonso De Cesare, Corrado Gadaleta, Chiara Giordano, Michela Migliori and Giuseppe Forte
Energies 2022, 15(15), 5564; https://doi.org/10.3390/en15155564 - 31 Jul 2022
Cited by 10 | Viewed by 2387
Abstract
The framework of energy transition poses significant challenges in subtransmission network development, where the increased renewable energy generation is collected, in order to efficiently convey power production, avoiding limitations in a range of operating conditions. In this paper, a method to evaluate possible [...] Read more.
The framework of energy transition poses significant challenges in subtransmission network development, where the increased renewable energy generation is collected, in order to efficiently convey power production, avoiding limitations in a range of operating conditions. In this paper, a method to evaluate possible margins for further renewable penetration due to electric network development is assessed, by means of scenario evaluation for the concretisation of renewable initiatives, combined producibility analysis, and load flow studies, accounting for operation islands in subtransmission network organisation, carried out in N and N-1 conditions. The method is applied to a provisional model of the southern part of the Italian power system. Full article
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15 pages, 3593 KiB  
Article
Overcoming the Limits of the Charge Transient Fault Location Algorithm by the Artificial Neural Network
by Roberto Benato, Giovanni Rinzo and Michele Poli
Energies 2019, 12(4), 722; https://doi.org/10.3390/en12040722 - 22 Feb 2019
Cited by 6 | Viewed by 2822
Abstract
In this paper, two algorithms for single-ended fault location are presented with reference to the unearthed sub-transmission Italian grid (with a voltage level of 60 kV). Both algorithms deal with the correlation between the ground capacitance charging frequency of sound phases and the [...] Read more.
In this paper, two algorithms for single-ended fault location are presented with reference to the unearthed sub-transmission Italian grid (with a voltage level of 60 kV). Both algorithms deal with the correlation between the ground capacitance charging frequency of sound phases and the fault position. In the former, the frequency response of a lumped parameter circuit in the Laplace domain is linked to the fault distance. With such a simplified lumped parameter circuit, the average error in locating a phase-to-ground (PtG) short circuit is 5.18% (total overhead line length equal to 60 km). Since this error is too high, another approach is presented. In this second algorithm, the frequency spectra of the transient current waveforms are used as a database for the training of an Artificial Neural Network (ANN). With this approach, the average error decreases significantly up to 0.36%. The fault location accuracies of the two proposed methods are compared in order to reveal their strengths and weaknesses. The developed procedures are applied to a single-circuit overhead line and to a double-circuit one, both modelled in the EMTP-rv environment, whereas the fault location algorithms are implemented in the MATLAB environment (for the ANN-based algorithm, the Deep Learning toolbox is used). Full article
(This article belongs to the Section F: Electrical Engineering)
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