Reliability Assessment of MV Power Connections

Hoduń, Piotr; Borecki, Michał

doi:10.3390/en14216965

Cited by 7 publications

(4 citation statements)

References 24 publications

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“…Surface discharge, on the other hand, occurs at the interface between two different dielectric materials. This problem is very common in cable joints, which are made up of several layers of solid dielectric materials [76,77]. Finally, the internal discharge occurs within low-resistance dielectrics.…”

Section: Partial Discharge Measurementsmentioning

confidence: 99%

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

Bindi,

Piccirilli,

Luchetta

et al. 2023

Energies

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This paper presents an extensive review of the most effective and modern monitoring methods for electrical power lines, with particular attention to high-voltage (HV) and medium-voltage (MV) systems. From a general point of view, the main objective of these techniques is to prevent catastrophic failures by detecting the partial damage or deterioration of components and allowing maintenance operations to be organized. In fact, the protection devices commonly used in transmission and distribution networks guarantee the location of faults, such as short-circuits, putting the non-functioning branch of the network out of service. Nowadays, alongside these devices, it is possible to introduce new intelligent algorithms capable of avoiding the total loss of functionality, thus improving the reliability of the entire network. This is one of the main challenges in modern smart grids, which are characterized by the massive integration of renewable energy sources and a high level of complexity. Therefore, in the first part of this paper, a general overview of the most common protection devices is proposed, followed by an analysis of the most modern prevention algorithms. In the first case, the coordination of the relays plays a fundamental role in obtaining the fault location with a high level of selectivity, while in the field of preventive analysis, it is necessary to address the implementation of artificial intelligence methods. The techniques presented in this paper provide a comprehensive description of the different monitoring approaches currently used in distribution and transmission lines, highlighting the coordination of protection relays, the computational algorithms capable of preventing failures, and the influence of the distributed generation in their management. Therefore, this paper offers an overview of the main diagnostic techniques and protection devices, highlights the critical issues that can be overcome through the introduction of artificial intelligence, and describes the main prognostic methods, focusing on their invasive level and the possibility of operating directly online. This work also highlights the main guidelines for the classification and choice between the different approaches.

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Section: Partial Discharge Measurementsmentioning

confidence: 99%

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

Bindi,

Piccirilli,

Luchetta

et al. 2023

Energies

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“…The applicability of the RF suppression filters is determined primary with their attenuation [5,6]. Filters are an essential element used in power grid facilities where there are various types of interference (affecting grid reliability) caused, among others, by the impact of overvoltages [7,8].…”

Section: Introductionmentioning

confidence: 99%

Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters

Borecki

Sroka

2023

Electronics

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Filters for the suppression of the RF disturbances in power lines are passive; wideband stop filters attenuating common as well as differential disturbances should be insensitive to the variation in the impedance at the input and the output. The design and verification process of such filters differs entirely from that used for the signal RF filters. In the document CISPR 17, entitled “Methods of measurement of the suppression characteristics of passive EMC filtering devices”, two definitions of the attenuation of the common and differential modes are presented. The first is simply direct measurement, and the second is based on a calculation using the single-ended S-parameters of the multiport. These two definitions are the source of diversity. In this paper, we hypothesize that the attenuations achieved with these two methods are identical only if the filter is in perfect balance. Consequently, different attenuations can be achieved. The requirement of balance can be violated due to the tolerances of the components used in the filter. The paper begins with a simple unbalanced four-port, for which analytical formulas are derived. It is also shown that an approach with single-ended S-parameters enables the calculation of the mode conversion between the input and the output, which is called the conversion loss. This is the measure of the grade of the imbalance. Thereafter, the common-mode attenuation of an exemplary RF suppression filter is derived with the presented methods. Additionally, the conversion loss of the filter is calculated. The comparison of the conversion loss with both attenuations is satisfactory, proving the hypothesis formulated in the paper.

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“…There are some problems with the development of technology. One of such problems are the disturbances and electromagnetic radiation that affect human health and the environment [1][2][3][4]. In order to counteract the negative effects of such an impact, research is conducted to enable the development of materials that absorb electromagnetic waves [5].…”

Section: Introductionmentioning

confidence: 99%

Methods of Assessing the Effectiveness of Filter Elements in Power Electronics

Borecki

Sroka

2022

Energies

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Newly constructed devices must meet a number of requirements in terms of the level of generated disturbances. To achieve an acceptable level in such devices, filters are installed—one of the cheapest ways to reduce interference in devices. One of the key elements of the filter that is responsible for the effectiveness of noise reduction are ferrites. Unfortunately, for various devices, an individual approach should be used in the selection of filters and, accordingly, ferrites. Due to the fact that ferrites from different manufacturers do not have standardized characteristics and information on their effectiveness, the selection of the right ferrite is a very time-consuming process. Therefore, this article will present the possibilities of quickly determining selected ferrite parameters in order to ensure the necessary level of noise reduction. For this purpose, assumptions from the CISPR 17 standard will be used. For selected types of ferrites, a large number of measurements were carried out in order to determine the optimal computational algorithm for adjusting ferrite characteristics to the designed conditions. The performance of these tests will be the basis for conducting tests on a larger number of ferrites, as well as for the development of possible standardization procedures.

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Reliability Assessment of MV Power Connections

Cited by 7 publications

References 24 publications

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

A Comprehensive Review of Fault Diagnosis and Prognosis Techniques in High Voltage and Medium Voltage Electrical Power Lines

Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters

Methods of Assessing the Effectiveness of Filter Elements in Power Electronics

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