scholarly journals ANALYSIS OF ENERGY FLOWS IN POWER SUPPLY SYSTEMS WITH NON-LINEAR LOAD

2019 ◽  
pp. 56-64
Author(s):  
B. L. Grabchuk ◽  
Yu. F. Romaniuk
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Neutral Line ◽  
Supply System ◽  
Power Losses ◽  
Energy Flows ◽  
Non Linear ◽  
Zero Sequence ◽  
Linear Elements

The problem of the non-sinusoidal modes analysis of the power supply system with non-linear elements and their influence on the efficiency of the power transmission are considered. It is carried out numerical analysis of electric energy flows for three phase power supply system with sinusoidal electromotive force source, linear active load and non-linear elements (diodes). Power transfer is considered as distribution of the primary power flow from source. The part of this flow is converted by non-linear elements and return into the network like secondary power stream of zero sequence and high harmonics which is consumed by resistance elements and causes additional power losses. As a result transporting efficiency and power factor are reduced and energy quality becomes worse. In order to improve the quality of electricity, it is proposed to normalize the relative value of the reactive power of distortion for non-linear electric collectors and to oblige manufacturers of electrical products to complete them with filters of higher harmonics. With the purpose of correct selection of the type and power of compensating devices and monitoring the parameters of the electric network mode, it is proposed to expand the functionality of electronic meters by dividing the reactive power into two components - shear power and distortion power, and for the objective analysis of energy flows, it is proposed to standardize the reactive power of distortion. It is shown that in such system current in neutral line increases due to overlaying of zero sequence harmonics currents. This should be taking into account during neutral line cross-section choice and power losses calculation.

Study on Selective Leakage Protection System of Mine High Voltage Grid Based on Harmonic Phase Comparison

2015 ◽  
Vol 9 (1) ◽  
pp. 253-262
Author(s):  
Liu Zhongfu ◽  
Zhang Junxing ◽  
Shi Lixin ◽  
Yang Yaning
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Neutral Point ◽  
Arc Suppression Coil ◽  
Zero Sequence ◽  
Harmonic Extraction ◽  
Power Direction ◽  
The Stability

As for the wide application of arc suppression coil to the grounding in neutral point of mine high voltage grid, grid leakage fault rules and harmonic characteristics of the neutral point grounding system through arc suppression coil are analyzed, the selective leakage protection program “zero-sequence voltage starts, fifth harmonics of grid zerosequence voltage and zero-sequence current are extracted for phase comparison” is proposed, and corresponding fifth harmonic extraction circuit and power direction discrimination circuit are designed. The experimental results show that the protective principle applies not only to the neutral point insulated power supply system, but also to the power supply system in which neutral point passes arc suppression coil, which can solve selective leakage protection problems under different neutral grounding ways, improving the reliability of selective leakage and guaranteeing the stability of the action value.

Energieversorgung in der Fabrik/Method for evaluating the energetic capacity in a factory for production expansion

2021 ◽  
Vol 111 (07-08) ◽  
pp. 559-564
Author(s):  
Alexander Mages ◽  
Ekrem Köse ◽  
Alexander Sauer
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Planning Process ◽  
Measurement Data ◽  
Supply System ◽  
Production Plant ◽  
Available Energy ◽  
Energy Flows ◽  
Additional Production ◽  
Structured Approach

Mit der Erweiterung eines Produktionssystems um eine zusätzliche Produktionsanlage steht das Unternehmen vor der Frage, welche Energieströme zur Verfügung gestellt werden müssen und ob die Energieversorgung der Fabrik ausreichende Kapazitäten vorweisen kann. Dieser Beitrag stellt ein strukturiertes Vorgehen vor, wie diese Fragen aus energetischer Perspektive in einem frühen Planungsprozess adressiert werden können. Anhand der Methode werden die relevanten Rahmenbedingungen identifiziert und es wird aufgezeigt, welche Messdaten der Energieerzeuger nötig sind, um eine energetische Bewertung durchführen zu können.   Before including an additional production plant, a manufacturing company has to identify what energy flows need to be made available and whether the capacity of the factory‘s power supply system is sufficient. This paper presents a structured approach to address these issues from an energy perspective in an early planning process. This method helps to identify the factory framework and shows what measurement data are required to carry out an energetic evaluation of the available energy generators.

scholarly journals MODERN METHODS OF REACTIVE POWER COMPENSATION IN PETROCHEMICAL PRODUCTION

2022 ◽  
Vol 1 (15) ◽  
pp. 22-28
Author(s):  
Igor' Golovanov ◽  
Alena Alekseeva ◽  
Vladimir Proskuryakov ◽  
Roman Samchuk
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Supply System ◽  
Petrochemical Production ◽  
Oil Refineries ◽  
Compensation Systems ◽  
Thyristor Control ◽  
Control Circuits

Electrical circuits of reactive power compensation on the basis of thyristor control circuits in the power supply system of oil refineries are considered. The main advantages, advantages over traditional reactive power compensation systems and directions of introduction into the power supply system of modern production are formulated.

scholarly journals Development and simulation of the Institute of ionosphere measuring complex energy consumption

2020 ◽  
Vol 2 (58) ◽  
pp. 28-32
Author(s):  
A. Gapon ◽  
O. Grib ◽  
S. Kozlov ◽  
O. Yevseienko ◽  
O. Levon
Keyword(s):  
Energy Consumption ◽  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Supply System ◽  
Stable Operation ◽  
Ministry Of Education ◽  
National Academy Of Sciences ◽  
Measuring Complex ◽  
Consumption System

The work is devoted to solving an urgent problem - the development of a computer model of the energy consumption system of the Institute of the ionosphere of the National Academy of Sciences and the Ministry of Education and Science of Ukraine in order to solve the problem of increasing the energy efficiency of the measuring complex. The power supply system of the complex is described, a generalized structural diagram of the loads - powerful consumers of electricity is presented. The graphs characterizing the energy consumption of individual powerful loads are presented, the problem of compensating the reactive power of loads is shown. The adequacy of the developed model is confirmed by the coincidence of the shape and values of the experimentally obtained characteristics on loads with the characteristics of the model. The model adequacy was assessed by the variance of feedback deviations from the system mean. The results obtained confirmed the possibility of using the developed Matlab-model of the energy consumption system of the measuring complex for creating and testing on the model of an energy-efficient power supply system, which will ensure the stable operation of scientific equipment for the implementation of research programs of the NAS of Ukraine.

scholarly journals SIMULATION OF A STATIC SYNCHRONOUS COMPENSATOR FOR A POWER SUPPLY SYSTEM WITH A NON-LINEAR LOAD

2020 ◽  
pp. 116-124
Author(s):  
Aleksei V. Makarov ◽  
Valeriy G. Makarov ◽  
Tatiana V. Makarova ◽  
Aleksei A. Petrov
Keyword(s):  
Simulation Model ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Static Synchronous Compensator ◽  
Nonlinear Load ◽  
Electromechanical Systems ◽  
Linear Load ◽  
Non Linear ◽  
Non Linear Load

The purpose of the work is developing a simulation model of factory’s the power system, with a nonlinear load model, which is a 12-pulses thyristor invertor and a model of a static synchronous compensator, which is multi-level voltage invertor, based on H-bridge invertor. Also defining preliminary parameters for the design of a static synchronous compensator in order to meet the requirements for power factors and limits of voltage harmonic and interharmonic distortion specified for the point of common connection to the mains supply. The analytical and numerical methods of mathematical programming and control of electromechanical systems were used. VisualStudio and PSIM software products for developing a control system for electromechanical systems and compiling a simulation model of an industrial power supply system were used. As a result of the research, a simulation model of the power supply system of an industrial enterprise, a model of a nonlinear load and a static synchronous compensator were developed. The rated power of the static synchronous compensator is determined to reduce the consumption of reactive power and the magnitude of the higher harmonics of the current, at the point of common connection, during operating a non-linear load.

Research on the SVC Auto-Compensating Method Based on the Variable Reactor

2013 ◽  
Vol 321-324 ◽  
pp. 1414-1417 ◽  
Author(s):  
Jing Chen ◽  
Qi Jian Cheng ◽  
You Xin Yuan ◽  
Wei Yang
Keyword(s):  
Working Conditions ◽  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Theoretical Foundation ◽  
Industrial Applications ◽  
Reactive Power Compensation ◽  
Supply System ◽  
Compensation Method ◽  
Secondary Side

The objective of this work is to research on a SVC auto-compensation method to improve the power factor of the power supply system. Firstly, the principles of the reactive power compensation of FC+TCR are analyzed qualitatively. According to the deficiencies of this compensator, a novel SVC auto-compensating method based on the variable reactor is presented. The reactor controlled by anti-parallel thyristors is namely as the variable reactor in this method. The secondary-side equivalent inductance of the variable reactor is varied by adjusting the SCR firing angles. And then, the equivalent inductance of the variable reactor of the compensator branch is adjusted indirectly for compensating the corresponding reactive power after the working conditions of the load are changed. Therefore, the auto-compensating of this var compensator is realized. The auto-compensating principles of this compensator have been analyzed, and a research on the compensating parameters of this compensator is given emphatically in this paper. Finally, the essential operation steps of this SVC compensation method are given. The research of this paper has laid a theoretical foundation for this compensator in industrial applications.

scholarly journals An Efficient Hybrid AC Metro Power Supply System Integrating PV With Grid

2019 ◽  
pp. 314-321
Author(s):  
J. Prince Joshua Gladson ◽  
A. Ravielango
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Control Method ◽  
Electrical Energy ◽  
Supply System ◽  
Urban Rail Transit ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Photovoltaic Plants

Metro is integral to the urban rail transit with the expansion of the city. Due to the tremendous power consuming of the traction load which is generally considered to be megawatt class, the attendant problems concerning energy-saving and emission-reduction cannot be neglected. An approach wherein the photovoltaic plants are connected into the metro traction power supply system to provide electrical energy is proposed in this paper. Given the deterioration of power quality brought about by PV connection, the photovoltaic inverter adopts output reactive power control method.

scholarly journals Swarm algorithms in dynamic optimization problem of reactive power compensation units control

2019 ◽  
Vol 9 (5) ◽  
pp. 3967
Author(s):  
V.Z Manusov ◽  
P.V. Matrenin ◽  
N. Khasanzoda
Keyword(s):  
Dynamic Optimization ◽  
Power Supply ◽  
Optimization Problem ◽  
Power Supply System ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Supply System ◽  
Bees Algorithm ◽  
Dynamic Optimization Problem ◽  
Engineering Research

Optimization of a power supply system is one of the main directions in power engineering research. The reactive power compensation reduces active power losses in transmission lines. In general, researches devoted to allocation and control of the compensation units consider this issue as a static optimization problem. However, it is dynamic and stochastic optimization problem that requires a real-time solution. To solve the dynamic optimization NP-hard problem, it is advisable to use Swarm Intelligence. This research deals with the problem of the compensation units power control as a dynamic optimization problem, considering the possible stochastic failures of the compensation units. The Particle Swarm Optimization and the Bees Algorithm were applied to solve it to compare the effectiveness of these algorithms in the dynamic optimization of a power supply system.

Experience in Reactive Power Compensation in the Power Supply System of Industrial Facilities

2021 ◽  
pp. 110-118
Author(s):  
Elena Ivanovna Gracheva ◽  
Muhayo Islomovna Toshkhodzhaeva ◽  
Okhunbobo Saifidinovich Rakhimov ◽  
Ayubjon Jumaevich Vohidov ◽  
Ismoiljon Ilkhomovich Ismoilov
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Supply System ◽  
Industrial Facilities
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