Analysis and optimization of the reactive power compensation modes in a power supply system

Yagup, V.G.; Yagup, Katerina; Kovalova, Yuliia; Kharchenko, Viktor; Besarab, Tetiana; Krasnov, Oleksii; Domanskii, Illya; Domanskii, Vasilii; Kostin, Hennadii; Abugoukh, Haidar Gafar

doi:10.15587/1729-4061.2019.168584

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Основою інтелектуалізації управління режимами роботи систем тягового електропостачання є ЕС [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Застосування ЕС в інтегрованих системах управління МЕТ стримувалося відсутністю технічних засобів автоматизації для розв'язання задач тягового електропостачання трамваїв і тролейбусів з урахуванням численності і різнорідності джерел інформації і необхідності прийняття рішень в умовах неповної або суперечливої інформації.…”

Section: аналіз останніх досліджень і публікаційunclassified

System of Control of Operating Modes of Electric Traction Networks on the Basis of Fuzzy Description of Their Condition

Vasenko

2021

MEC

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Given the need to save energy and reduce the cost of passenger transport on urban electric transport, the greatest effect (from 5 to 15%) is achieved through the introduction of comprehensive information technologies based on rational modes of traction of electric rolling stock and traction and external power supply. The criterion for assessing the modes of operation of power supply systems of urban electric transport is the energy consumption of traction substations, which reflects most of the influencing factors, including the inseparable relationship of traction and external power supply systems. An approach to the implementation of energy-saving technologies of traction power supply of urban electric transport is proposed, which uses fuzzy models and methods of representation for analysis and selection of controls. It is proposed to implement the control of the power supply system operation modes and the selection of modes on the basis of a vague description of their states. When forming the rules, the following parameters are set: deviation of the daily number of transported passengers on the i-th interstation zone of the two-track section, for the characterization of which the values of fuzzy values "lag (strong, weak, absent)" and "advance (absent, weak, strong)" deviation of daily active energy losses for the substation zone and with the values "strong, absent, weak"; the difference between the daily energy consumption of the i-th substation zone, for the actual mode of operation of the power supply system and the reference mode of uniform loading of the power supply system. When constructing a control model in the form of fuzzy rules, each fuzzy characteristic is approximated by N fuzzy quantities with triangular membership functions. For the fuzzy characteristic the minimum and maximum values of an interval in which there are its admissible values are set. Approximate quantities have a triangular degree of belonging: the vertex lies in the center, it corresponds to the degree of belonging 1, and the other two vertices - on the sides of it with degrees of belonging 0. The fuzzy conclusion is based on the rule of fuzzy Mamdani implication. The constructed base of fuzzy rules, which replaces the model of modes of the power supply system, can be used as a guide to the energy dispatcher to select control for the next time period, taking into account the conditions of uncertainty. The principles of formation of algorithms and filling of databases and knowledge of expert systems are developed and problems of maintenance of modes of energy saving in systems of traction power supply of city electric transport are solved. The proposed algorithms for creating databases of expert systems can be implemented after the modernization of power supply control systems based on new integrated systems. Expert systems must be included in the software of the automated workplace of the energy dispatcher. Their inclusion is planned after introduction of new microprocessor systems of telemechanics of regional control points.

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Section: аналіз останніх досліджень і публікаційunclassified

System of Control of Operating Modes of Electric Traction Networks on the Basis of Fuzzy Description of Their Condition

Vasenko

2021

MEC

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Verification of the gauss’s law with the unknown parameters by the Kolmogorov criterion in the problems of railways electric supply

Lindenbaum

Ignatieva

2021

J. Phys.: Conf. Ser.

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Traction currents and voltages in the overhead railroad contact line hypothetically obey the Gauss’s distribution law. An algorithm for statistical modeling of the Kolmogorov distribution for the unknown values of the Gaussian law parameters has been developed. For a large number of the modeling program implementations, it has been shown that testing the hypothesis about the distribution law without taking into account the number of unknown parameters leads to an unacceptable increase in the criterion significance and a decrease in its power. The distribution of the Kolmogorov criterion is calculated with sufficient accuracy for two unknown parameters, which allows its wide practical use.

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Modeling and calculation of SC currents for alternative group grounding system for the dc contact line supports

Osipov

Osipova

2021

J. Phys.: Conf. Ser.

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The problem of creating a mathematical model of the group grounding system of the contact line supports is considered. The paper considers an alternative way of organizing group grounding. For such a method of grounding, a model of a section of a DC railroad is proposed, which makes it possible to calculate the SC current. An analysis of the constructed model quality is carried out, an assessment of the calculation error according to the proposed method is given.

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Analysis and optimization of the reactive power compensation modes in a power supply system

Cited by 4 publications

References 5 publications

System of Control of Operating Modes of Electric Traction Networks on the Basis of Fuzzy Description of Their Condition

System of Control of Operating Modes of Electric Traction Networks on the Basis of Fuzzy Description of Their Condition

Verification of the gauss’s law with the unknown parameters by the Kolmogorov criterion in the problems of railways electric supply

Modeling and calculation of SC currents for alternative group grounding system for the dc contact line supports

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