Analysis of the quantity and causes of outages in LV/MV electrical grids

Vinogradov, Alexander; Виноградова, Алина; Bolshev, Vadim

doi:10.17775/cseejpes.2019.01920

Cited by 11 publications

(16 citation statements)

References 3 publications

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“…Analysis of the types and amount of damage in the study area showed that the main causes of damage to overhead lines are collapsing and breaking wires, thunderstorm insulation overlaps, wind loads, weakening of the strength of support parts, etc. Damage to overhead Comparison with statistical data from other regions shows that, in general, the causes of damage are similar both in composition and in percentage [13], [14]. This makes it possible to use the same approaches as in other regions to increase the reliability of distribution electric networks, thus increasing the efficiency indicators of the power supply system of consumers as a whole [15], [16].…”

Section: Resultsmentioning

confidence: 97%

“…The analysis of the used schemes shows that the majority of 10 kV electric transmission lines are made ring-shaped, have the possibility of redundancy, but this redundancy in the vast majority of cases is manual. 0.4 kV transmission lines are mainly radial, but there are 230 ring ones, which distinguishes the networks under consideration from networks in some other regions [13], [14]. The use of 0.4 kV ring ETLs increases the reliability of power supply to consumers.…”

Section: Resultsmentioning

confidence: 99%

“…This makes it possible to use the same approaches as in other regions to increase the reliability of distribution electric networks, thus increasing the efficiency indicators of the power supply system of consumers as a whole [15], [16]. The priority of these measures is the downsizing of power lines, the use of automatic sectionalizing of power lines, the use of insulated wires [13].…”

Section: Resultsmentioning

confidence: 99%

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Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district

et al. 2020

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Sustainable operation of the power grid complex is impossible without reliable and high-quality operation of 10/0.4 kV electrical distribution networks, which are the final link in the system for providing consumers with electric energy and are in direct interaction with a specific consumer. The study of statistical information on the composition of distribution networks makes it possible to draw conclusions about electrical network state, to implement recommendations for their development and to compare distribution electrical networks in different regions. This information is especially relevant for analyzing the reliability of power supply to consumers connected to the considered electrical distribution networks. Such indicators of network structure as the length of electric transmission lines of different voltages and power transmission schemes are studied. It also analyzes the number of damages in networks, the causes of these damages, data on the time of planned and emergency outages. This paper considers the structure of 10/0.4 kV electrical distribution networks located on the territory of one of the districts of the Kaluga region. The sample for distribution networks was: 1190 overhead transmission lines and 536 transformer substations. Consumers in the district are 21671 subscribers of individuals and 1986 subscribers of legal entities, that is, a total of 23657 metering points. On the lines of 0.4 kV and 10 kV, the percentage of their isolated design was revealed. The share of single-transformer and two-transformer versions of transformer substations is analyzed.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district

et al. 2020

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“…The associate editor coordinating the review of this manuscript and approving it for publication was Yu Liu . load), failures of distribution transformer have a serious impact on the reliability and operational stability of the electric power system [5], [6]. Many factors may have an impact on the life of distribution transformer, e.g.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Soni¹,

Chakrabarti²,

Leonowicz

et al. 2021

IEEE Access

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Distribution transformer is the most vital component in the power system. Failure of a transformer leads to loss of revenue besides affecting the reliability of power supply to consumers. It can lead to the non-availability of the transformer for a long duration. Due to this, it is important to maintain the good quality of mineral oil. Thus, if the quality of the mineral oil is reduced then its dielectric strength/quality is degraded. Finally, it can affect the services of the transformer, in terms of continuity of power supply. This paper entails the development of a mathematical MATLAB/Simulink model which able to calculate the life cycle of distribution transformer and exact oil changing frequency. With the help of proposed Matlab/Simulink models, the plot curves between furan content formation versus time, pollution index versus time, and dielectric strength of oil versus time are also prepared. The article methodology uses the newly proposed equations, that are in accordance with IEEE standards: IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators (IEEE Std. C57.91-2011) and IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use (IEEE Std C57.637-2015). Then the case study for a 100 kVA distribution transformer is realized. So, with the input values in the Simulink model of load current of the transformer, dielectric constant of oil and flash point of oil we can estimate the life of the distribution transformer. Harmonic load factor in our research work is not included, in order to reduce influence of harmonic load we need to installed the active filter, which is not covered in this paper.

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“…At the same time, the implementation of these means as well as using methods for increasing PSR and PQ, including ones mentioned above, requires monitoring the electrical network parameters in order to accurately and quickly respond to any changes in a power supply system [20]. In addition, such a monitoring system, even without other technical means of increasing power supply reliability, can reduce some constituents of the power supply restoration time via quickly obtaining and analyzing failure signals by a dispatching office [21]. It affects power supply efficiency on the good side as well.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Number and Duration of Power Outages and Voltage Deviations at Both Sides of Switching Devices

et al. 2020

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The need for monitoring the electrical network parameters is identified to use methods and means to improve power supply reliability and power quality. The article lists the exiting sensors for monitoring electrical parameters and substantiates the necessity of monitoring the parameters at both sides of switching devices. In the paper, there is basic information on the structure, operation and capabilities of the monitoring system for power supply reliability and power quality. A functional electrical circuit of the device for monitoring the number and duration of power outages and voltage deviations is proposed for monitoring the parameters at both sides of switching devices. An algorithm for the device operation has also been developed, which allows detecting the main emergency modes in the consumer's internal network. The article also describes laboratory tests of a prototype of the device for monitoring the number and duration of power outages and voltage deviations, which is based on the Arduino NANO V3 ATmega 328 microprocessor. INDEX TERMS power supply system efficiency, power supply reliability, power quality, power supply restoration time, power quality inconsistency time, monitoring system, Arduino prototype, laboratory tests.

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Analysis of the quantity and causes of outages in LV/MV electrical grids

Cited by 11 publications

References 3 publications

Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district

Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Monitoring the Number and Duration of Power Outages and Voltage Deviations at Both Sides of Switching Devices

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