Improving the optimal system of automated control over the level of electric power quality indicators in electric networks
DOI:
https://doi.org/10.15587/1729-4061.2020.200624Keywords:
automated control system, electricity quality indicators, multi-criteria optimization, voltage asymmetryAbstract
This paper reports solving an important scientific task of minimizing the economic losses caused by the established deviation and the asymmetry of voltage in the distributing electrical networks with a rated voltage of 10 kV.
It has been found that the existing systems of automated control over the mode parameters of distributing electrical networks do not fully take into consideration the multifunctional influence of symmetry-compensating devices at the level of electricity quality indicators.
It has been proposed to use, as the criteria functions for the task on automated control over the electric power quality indicators, the functional dependences that assess the level of losses caused by the established deviation and asymmetry of voltage in electrical networks. That has made it possible, in contrast to existing control systems, to better account for the negative impact of the established deviation and asymmetry of voltages on the modes of electric network operation.
We have determined the functional dependences between the input and output parameters of the control object (a distributing electric network with a voltage of 10 kV with a symmetry-compensating device), which formed the basis of the criteria functions for a multi-criteria optimization problem. The ultimate solution to the problem on a multi-criteria optimization based on a method of approaching a utopian point in the criteria space was derived by minimizing the Chebyshev distance from the utopian point to a Pareto-optimal set of solutions. Based on the obtained solution to the problem on a multi-criteria optimization, we have built an algorithm for determining the vector of optimum control.
Computer simulation of the optimal automated control system for the power quality indicators in distributing electrical networks has been performed.
Analysis of the simulation results has revealed that the automated control system proposed in this work, when compared with the existing ones, makes it possible to reduce the negative effect exerted by the above-the-norm values of the established deviation and asymmetry of voltage on the operation of electrical networksReferences
- Popova, I., Nesterchuk, D., Popryadukhin, V. (2017). An influence analysis of non-symmetric loading upon operation modes of three-phase asynchronous electric motor. Visnyk KhNTUSH im. P. Vasylenka. Tekhnichni nauky, 186, 85–87.
- Zimann, F. J., Batschauer, A. L., Mezaroba, M., Neves, F. A. S. (2019). Energy storage system control algorithm for voltage regulation with active and reactive power injection in low-voltage distribution network. Electric Power Systems Research, 174, 105825. doi: https://doi.org/10.1016/j.epsr.2019.04.003
- Zajkowski, K. (2020). Two-stage reactive compensation in a three-phase four-wire systems at nonsinusoidal periodic waveforms. Electric Power Systems Research, 184, 106296. doi: https://doi.org/10.1016/j.epsr.2020.106296
- Panda, A. K., Patnaik, N. (2017). Management of reactive power sharing & power quality improvement with SRF-PAC based UPQC under unbalanced source voltage condition. International Journal of Electrical Power & Energy Systems, 84, 182–194. doi: https://doi.org/10.1016/j.ijepes.2016.05.010
- Pană, A., Băloi, A., Molnar-Matei, F. (2020). New method for calculating the susceptances of a balancing capacitive compensator for a three-phase four-wire distribution network. International Journal of Electrical Power & Energy Systems, 115, 105414. doi: https://doi.org/10.1016/j.ijepes.2019.105414
- Duarte, S. N., Souza, B. C., Almeida, P. M., Araujo, L. R., Barbosa, P. G. (2020). Control algorithm for DSTATCOM to compensate consumer-generated negative and zero sequence voltage unbalance. International Journal of Electrical Power & Energy Systems, 120, 105957. doi: https://doi.org/10.1016/j.ijepes.2020.105957
- Zeng, X. J., Zhai, H. F., Wang, M. X., Yang, M., Wang, M. Q. (2019). A system optimization method for mitigating three-phase imbalance in distribution network. International Journal of Electrical Power & Energy Systems, 113, 618–633. doi: https://doi.org/10.1016/j.ijepes.2019.05.038
- Plieshkov, P. H., Zinzura, V. V., Plieshkov, S. P. (2019). Automatic control of electrical distribution network mode with the voltage unbalance. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 3, 83–91. doi: https://doi.org/10.29202/nvngu/2019-3/10
- Taranukha, M. S., Teluyta, R. V., Zinzura, V. V. (2015). Optimal control of reactive load modes in conditions of asymmetry of voltage electricity distribution networks. Visnyk Natsionalnoho tekhnichnoho universytetu «Kharkivskyi politekhnichnyi instytut». Zbirnyk naukovykh prats. Tematychnyi vypusk: Problemy udoskonalennia elektrychnykh mashyn i aparativ. Teoriya i praktyka, 42, 62–66. Available at: http://repository.kpi.kharkov.ua/handle/KhPI-Press/19801
- Zinzura, V. (2012). The justification of the solution of the problem of multicriteria optimization of voltage control in power networks. Zbirnyk naukovykh prats Kirovohradskoho natsionalnoho tekhnichnoho universytetu. Tekhnika v silskohospodarskomu vyrobnytstvi, haluzeve mashynobuduvannia, avtomatyzatsiya, 25 (1), 350–360. Available at: http://dspace.kntu.kr.ua/jspui/handle/123456789/1388
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Petro Plieshkov, Andrii Kotysh, Andrii Nekrasov
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
