Features of filter-compensating devices application in power supply systems at coal mines in Ukraine

2013 ◽  
pp. 75-80
Keyword(s):  
Power Supply ◽  
Coal Mines ◽  
Compensating Devices ◽  
Supply Systems

scholarly journals Development of Interrelated Voltage Regulation System for Coal Mines Energy Efficiency Improving

2018 ◽  
Vol 41 ◽  
pp. 03013 ◽  
Author(s):  
Fedor Nepsha ◽  
Roman Belyaevsky
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Active Power ◽  
Regulation System ◽  
State Matrix ◽  
Voltage Level ◽  
Supply Systems

In this paper, the authors propose an algorithm for interrelated voltage regulation in the power supply system of coal mine which allows to provide a normative voltage level and to minimize the level of active power consumption. A feature of the proposed algorithm is a separate consideration of discrete and nondiscrete variables. Nondiscrete variables are represented as a state matrix. The optimization of nondiscrete variables is performed for each state. The algorithm chooses a state with the minimal active power consumption. The obtained values of discrete and nondiscrete variables are transferred in the form of control signals to voltage regulation devices. In this case, the periodicity of the switching is determined by the resource of the on-load tap-changing device. The use of this algorithm will theoretically allow increasing the energy efficiency of power supply systems of coal mines.

scholarly journals Improving the quality of electricity in the power supply systems of the mineral resource complex with hybrid filter-compensating devices

2021 ◽  
Vol 247 ◽  
pp. 132-140
Author(s):  
Yurii Sychev ◽  
Roman Zimin
Keyword(s):  
Mineral Resource ◽  
Mathematical Models ◽  
Power Quality ◽  
Power Supply ◽  
Active Filters ◽  
Hybrid Filter ◽  
Higher Harmonics ◽  
Compensating Devices ◽  
Supply Systems

The urgency and necessity of choosing and justifying the structures of hybrid filter-compensating devices based on series and parallel active filters to improve the quality of electricity in the power supply systems of enterprises of the mineral resource complex is shown. Mathematical models of hybrid filter compensating devices based on parallel and series active filters have been developed. Based on these mathematical models, computer simulation models of the indicated hybrid structures have been developed. The results of simulation showed the effectiveness of the correction of power quality indicators in terms of reducing the level of higher harmonics of current and voltage, as well as voltage deviations. The degree of influence of filter-compensating devices on the power quality indicators, which determine the continuity and stability of the technological process at the enterprises of the mineral resource complex, have been revealed. It has been established that a hybrid filter-compensating device based on a parallel active filter can reduce the level of higher harmonics of current and voltage by more than 90 and 70 %, respectively, and based on a series active filter, it can reduce the level of higher harmonics of voltage by more than 80 %. Based on the simulation results, the possibility of compensating for the reactive power of a hybrid structure based on parallel active and passive filters has been revealed. The possibility of integrating hybrid filter-compensating devices into more complex multifunctional electrical systems for the automated improvement of the quality of electricity is substantiated, as well as the expediency and prospects of their use in combined power supply systems based on the parallel operation of centralized and autonomous sources of distributed generation.

scholarly journals Analysis of compensating devices efficiency in ac traction power supply systems

2021 ◽  
Vol 2131 (4) ◽  
pp. 042083
Author(s):  
A V Agunov ◽  
D A Sokolov
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Electricity Consumption ◽  
Traction Power Supply System ◽  
Consumption Reduction ◽  
Before And After ◽  
Compensating Devices ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Abstract The article describes the main methods of reactive power compensation used in 27.5 kV AC traction power supply systems on the railways of the Russian Federation. The cases of installation of the longitudinal and transverse capacitive compensation devices at traction substation and sectiolizing post are considered in this paper. Based on experimental data their effectiveness has been analysed by comparing the main parameters of the traction power supply system before and after the installation of the compensating devices. The main effect in terms of power consumption reduction is achieved through application of reactive power cross-compensation devices. The results of the analysis show that the total electricity consumption in the researched area decreased by 23 % and the proportion of higher harmonic elements of voltage decreased by 15 %.

scholarly journals Control of quality and modes of power supply systems using contactless devices

2021 ◽  
Vol 289 ◽  
pp. 07026
Author(s):  
Erkin Abduraimov ◽  
Dilshad Khalmanov ◽  
Moldagali Peysenov ◽  
Nargiza Khamidova
Keyword(s):  
Quality Control ◽  
Power Supply ◽  
High Reliability ◽  
Input Voltage ◽  
Turn On ◽  
Automatic Quality Control ◽  
Transformer Winding ◽  
Controlling Element ◽  
Compensating Devices ◽  
Supply Systems

The article discusses the issues of creating contactless switching devices for automatic quality control and operation modes of power supply systems, using the developed contactless thyristor voltage relays, characterized by high reliability and speed, combining a sensitive system and a powerful final controlling element. Schemes with operating principles and experimental characteristics are given. It is proposed to use it to automatically turn on or off the booster transformer winding when the input voltage changes to maintain the rated voltage of electricity consumers, as well as to create a power regulator for capacitor banks of reactive energy compensating devices.

scholarly journals Simulation modeling of the power supply system of the coal mine excavation area with facts devices

2021 ◽  
Vol 315 ◽  
pp. 01013
Author(s):  
Vyacheslav Voronin ◽  
Fedor Nepsha ◽  
Andrew Kulikov ◽  
Anton Korneev ◽  
Anastasia Khasanova
Keyword(s):  
Coal Mine ◽  
Power Supply ◽  
Power Supply System ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Supply System ◽  
Mining Equipment ◽  
Extraction Area ◽  
Facts Devices ◽  
Supply Systems

The introduction of technologies for active-adaptive control of the operating modes of the power supply systems of coal mines can contribute to an increase in the energy efficiency of coal mining. High-response FACTS devices of the second generation can be used for dynamic reactive power compensation, voltage regulation and limitation of current and voltage harmonic components in conditions of sharply variable electrical loads of mining machines at a breakage face. Evaluation of the effectiveness of the implementation of FACTS devices in the power supply systems of coal mines can be performed using simulation methods.This article discusses the main approaches to the development of a simulation model of a power supply system of a coal mine, mining equipment and FACTS devices. The main results of modeling the joint operation of mining machines are shown. Conclusions about the effectiveness of the use of FACTS devices in the extraction area of a coal mine are made.

scholarly journals Application of FACTS Devices in Power Supply Systems of Coal Mines

2020 ◽  
Vol 174 ◽  
pp. 03026
Author(s):  
Fedor Nepsha ◽  
Vyacheslav Voronin ◽  
Roman Belyaevsky ◽  
Vladimir Efremenko ◽  
Kirill Varnavskiy
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Reactive Power ◽  
Coal Mines ◽  
Reactive Power Compensation ◽  
Technical Documentation ◽  
Scientific Publications ◽  
Industrial Enterprises ◽  
Facts Devices ◽  
Supply Systems

In this article, the authors discuss the use of FACTS devices in coal mine power systems. The problems of reactive power compensation and the disadvantages of regulatory and technical documentation regarding the use of modern reactive power compensation devices are considered. The main types of FACTS devices that can be used in coal mines are identified. The scientific publications in the field of application of FACTS devices in power supply systems of industrial enterprises are analyzed. The cost indicators of FACTS devices are considered and conclusions are drawn on the theoretical technical and economic efficiency of using FACTS devices in mine conditions.

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