Identification of parameters of models of electric network elements on the basis of Tellegen’s theorem

Stepanov, Andrew; Степанов, С. А.; Kostyukova, S. S.

doi:10.3103/s1068371216070105

Cited by 15 publications

(5 citation statements)

References 2 publications

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“…Для вычисления нагрузочных потерь используются разработанные алгоритмы и методы. Как известно, низковольтные промышленные сети имеют сложную и разветвленную структуру и, следовательно, требуется выявление погрешностей и их причин при использовании расчетов оценки уровня потерь ЭЭ в цеховых сетях [7][8][9].…”

Section: введение сравнительный анализ наиболее распространенных детеunclassified

A comparative analysis of the most common deterministic methods for the calculation of electricity losses in industrial networks

Gracheva

Шакурова

Абдуллазянов

2019

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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: The work is devoted to the analysis of deterministic most common methods for determining electricity losses in low-voltage industrial power supply networks. The method of graphical integration, the method of calculating electricity losses using the maximum loss time, the method of determining losses by time 2t, the method of calculating electricity losses by the average node loads are considered. The features of the application of each method are revealed. It is shown that for the method of graphical integration, initial data on the dependences of load schedules for each network element are required, and the method of calculating losses by average node loads can be used in networks with relatively constant loads. We consider the methods of calculating the losses based on graphical integration, the time of largest losses, 2t and the root-mean-square loads.At the same time, the errors of the considered methods for calculating electricity losses can be due to such reasons as the neglect of the heating temperature of the conductors, the neglect of the resistances of the contact connections of switching devices, the inaccuracy of determining the values of losses during the highest and lowest power demand, the inaccuracy of determining the time of the largest losses,. disregarding the form of the load schedule of consumers.Using the example of an industrial radial network site with known load graphs of consumers, the electric power losses in the circuit lines with the specified methods were calculated with the determination of the error of each method and the identification of the causes of errors. In this case, the method of graphical integration was adopted as the reference method of calculation. As a result of the calculations, it was established that the method of calculating 2t has the smallest error. It is shown that when choosing a method for determining electricity losses, it is necessary to observe the condition of compliance with methodological and informational errors.

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Section: введение сравнительный анализ наиболее распространенных детеunclassified

A comparative analysis of the most common deterministic methods for the calculation of electricity losses in industrial networks

Gracheva

Шакурова

Абдуллазянов

2019

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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“…As you know, during the operation of radio electronic devices, these parameters change in time randomly, depending on the state of the external environment, which leads to certain difficulties in the development of models of physical processes in radio electronic devices and algorithms for parametric identification. The known methods of parametric identification [10][11][12][13] are not sufficiently adapted for their application in real time. One of the possible approaches in this direction is the problem of identifying the parameters of distribution networks based on numerical methods [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

For the construction of subsystem for power line diagnostic states of distribution networks as a part of AMRCS

Omorov

Koibagarov

Zhanybaev³

et al. 2020

E3S Web of Conf.

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At present, in order to automate and informative processes in distribution zones (DZ) with a voltage of 0.4 kV, new technologies have found wide application in the form of automated meter reading and control system (AMRCS). However, as part of these information systems, there are no technologies focused on solving diagnostic problems. The report proposes methodological and algorithmic foundations for constructing a subsystem for diagnosing the states of wires of the main lines of DZ. Diagnostic criteria are formulated based on the assessment of the level of their run-out. The research results are aimed at improving the existing AMRCS and increasing the reliability of distribution networks.

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“…Анализ показывает, что наиболее эффективный путь значительного снижения потерь электроэнергии состоит в разработке и внедрении дополнительных подсистем в составе существующих АСКУЭ [7], ориентированных на выполнение таких важных функций, как оптимизация режимов работы РЭС [8][9][10], а также идентификация и локализация мест несанкционированного отбора электроэнергии в сети [11,12]. Непосредственное применение известных математических моделей [13][14][15] и методов [16][17][18][19] для этих целей представляет определенные трудности, так как при этом необходимо учитывать ряд факторов, таких как несимметрия токов и напряжений в сети [20,21], случайный характер утечек тока, а также необходимость решения соответствующих функциональных задач в режиме реального времени [7]. В [12,22] предложены подходы к идентификации и локализации мест утечек тока, включая несанкционированные отборы электроэнергии, в распределительной сети напряжением 0,4 кВ на основе комплексного представления ее переменных (токов, напряжений).…”

Section: Introductionunclassified

The Localization of Current Leakage in the Distribution Network Based on Automated Meter Reading and Control System (AMRCS) Data

2019

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The paper considers a four-wire distribution electric network (DEN) with 0.4 kV voltages, setting the task of identifying the places of current leaks in the DEN. The available methods of its solution are based on the preliminary construction of a three-phase network model in an integrated form, which, to a certain extent, complicates the identification procedure. The authors propose an identification algorithm that uses the idea of simplifying the initial structure of a three-phase network by decomposing it into relatively simple electrical circuits. Based on the analysis of the equations of the electrical circuits of the last ones, a new identification criterion is derived, which allows for the localization of current leakage places in the network. The formation of mathematics (rules), on which the specified criterion is based, is carried out without calculating the currents and voltages in the network. In this case, only the values of the complex resistances of the loads and the inter-customer sections of the backbone transmission line are used, which greatly simplifies the implementation of the computational algorithm of the proposed method. The obtained results shall be usable for the development of special software for the subsystem for identification and monitoring of electricity losses as part of AMRCS.

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Identification of parameters of models of electric network elements on the basis of Tellegen’s theorem

Cited by 15 publications

References 2 publications

A comparative analysis of the most common deterministic methods for the calculation of electricity losses in industrial networks

A comparative analysis of the most common deterministic methods for the calculation of electricity losses in industrial networks

For the construction of subsystem for power line diagnostic states of distribution networks as a part of AMRCS

The Localization of Current Leakage in the Distribution Network Based on Automated Meter Reading and Control System (AMRCS) Data

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