On the need of addressing voltage sag and short interruption concerns in power supply system design and operation

2021 ◽  
Vol 2 ◽  
pp. 12-20
Author(s):  
Gennagy Vagin ◽  
Alexandr Sevostyanov ◽  
Sergey Iurtaev
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Cost Effective ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Improve Design ◽  
Electric Power Quality ◽  
Equipment Failures ◽  
Supply Systems ◽  
Financial Losses

Voltage sags and interruptions are generally caused by faults on power supply systems. Voltage sags and interruptions significantly reduce electric power quality and can result to equipment failures, control malfunctions, and other technical and financial losses. In our research, we proof the need of addressing voltage sag and short interruption concerns in power supply systems to make them safer and more cost-effective. We describe certain characteristics of voltage sags and short interruptions, determine what causes them, how they affect various types of equipment, and how to improve design and operation of power supply systems taking into account protection from voltage sags and short interruptions.

scholarly journals Joint voltage and frequency predictive controllers for distributed generation plants

2021 ◽  
Vol 25 (5) ◽  
pp. 568-585
Author(s):  
Yu. N. Bulatov
Keyword(s):  
Quality Indicators ◽  
Distributed Generation ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Voltage Sag ◽  
Transient Time ◽  
Operating Modes ◽  
Supply Systems ◽  
Predictive Controllers

The paper determines the effect of proposed joint voltage and frequency predictive controllers for distributed generation (DG) plants on quality indicators characterizing the control process in different operating modes of power supply systems. The studies are conducted in the MatLab environment (Simulink and SimPowerSystems simulation packages) employing control engineering methods. It is proposed to design and adjust joint predictive controllers by determining the resonant frequency of oscillations for the master generator rotor. This approach provides better quality indicators of voltage and frequency control in power supply systems while maintaining the same settings for the controllers of DG plants. With an additional load in an isolated power supply system, the maximum voltage sag is found to be 1.75 times lower than for local predictive control and 3.5 times lower as compared to the use of conventional controllers. For the specified mode, predictive controllers enable a threefold reduction in the transient time between rotor rotational speeds in a synchronous generator. In the start mode of a powerful electric motor, the predictive controllers of synchronous generators in the power supply system enable a 1.5 times reduction in voltage sag, with a 1.4 times reduction in overvoltage following its start. In the case of a short-term three phase short-circuit, joint predictive controllers allow a 1.5 times decrease in transient time and a 2.3 times decrease in the overshoot of power line frequency as compared to local control. In addition, frequency oscillation in the power system is also reduced. Similar effects are observed in other operating modes of the considered power supply systems equipped with DG plants. The performed dynamic simulation confirms the effectiveness of using joint voltage and frequency predictive controllers for DG plants, which consists in a positive impact on the quality of processes involved in controlling the parameters of power supply systems in various operating modes.

scholarly journals Energy profiles as a method for minimizing weight of hybrid power supply systems

2017 ◽  
pp. 5-13
Author(s):  
Arkadiusz Adamczyk
Keyword(s):  
Power Supply ◽  
Energy Demand ◽  
Power Supply System ◽  
Electric Energy ◽  
Energy Profiles ◽  
Supply Systems ◽  
Alternative Solutions ◽  
Analysis Of Performance ◽  
Source Of Information

This article presents an analysis of energy demand by a group of portable military use appliances. This analysis was used by the author to offer an solution aimed at reducing the weight of the power supply system. This solution is based on energy profiles which were derived from the analyses and measurements, and on applying appropriately modified hybrid supply sources. Catalogue data are often used in support of an analysis of performance of electronic appliances. For a user, documents prepared by a manufacturer are the main source of information concerned with the amount and quality of electric energy sources required for the appliance to work properly. Investigations carried out in real conditions often verify this data, which provides a base for seeking alternative solutions in the course of designing new sources of power, e.g. such as the ones proposed in the article.

scholarly journals Experimental Study on Voltage Sag Tolerance of LED Electronic Display

2021 ◽  
Vol 2136 (1) ◽  
pp. 012023
Author(s):  
Yidan Song ◽  
Shangshu Guan ◽  
Haijiang Yao ◽  
Shun Tao
Keyword(s):  
Power Supply ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Switching Power Supply ◽  
Switching Power ◽  
Electronic Displays ◽  
Test Platform ◽  
The Status ◽  
Electronic Display ◽  
Related Experimental Work

Abstract Widely used LED electronic displays have high requirements for power quality. Because of the status quo of LED technology update and the lack of related experimental work, this paper first analyzes the hardware composition of LED electronic display and switching power supply module. In addition, the paper points out that the transient tolerance of LED screens is mainly determined by switching power supply modules. Then, a test platform was built, and a certain type of LED screen was selected to investigate the influence of voltage temporary drop value and duration, phase jump, and initial Angle of temporary drop on the tolerance of LED electronic display. It provides data support for evaluating and managing the effects of voltage sags on LED electronic displays and the design of power supply schemes.

scholarly journals Power supply reliability models of oil production facilities

2021 ◽  
pp. 59-63
Author(s):  
T. D. Gladkikh ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Oil Production ◽  
Gas Production ◽  
Electrical Network ◽  
Reliability Models ◽  
Reliability Indicators ◽  
Supply Systems ◽  
Production Facilities ◽  
Supply Reliability

This paper presents power supply systems reliability models of oil production facilities. There are two types of electrical complexes: an electrical network with a consumer sensitive to voltage dips and an electrical network with a consumer with technological redundancy. A comprehensive analysis of the power supply system and the power consumer allowed us to clarify the reliability indicators and determine the direction of improving the power supply reliability to oil and associated petroleum gas production facilities

scholarly journals Measurement of currents and voltages non-sinusoidal parameters in power supply systems with rectifier load

2018 ◽  
Vol 245 ◽  
pp. 06007 ◽  
Author(s):  
Valery Vanin ◽  
Alexandr Bulychov ◽  
Maxim Popov ◽  
Olga Vasilyeva ◽  
Maria Shakhova
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Negative Impact ◽  
Supply System ◽  
Municipal Services ◽  
Quality Indices ◽  
Electric Drives ◽  
Traction Substation ◽  
Railway Traction ◽  
Supply Systems

The use of frequency-controlled electric drives in industry and municipal services is accompanied by the problem of their negative impact on the distribution network. As examples, the results of measurements of power quality indices in the power supply system of an oil producing enterprise and on the supply input of a railway traction substation are given. It is shown that the voltage subgroup total harmonic distortions (THDS) can exceed their rated permitted values in 100% of the measurement time.

Math model of a power beam feeding a spacecraft under conditions of intermittent power supply

2020 ◽  
pp. 56-65
Author(s):  
Aleksey M. BEZNYAKOV ◽  
Aleksey V. NEMIROV ◽  
Gennadiy B. STEGANOV
Keyword(s):  
Power Consumption ◽  
Power Supply ◽  
Power Plants ◽  
Power Supply System ◽  
Supply System ◽  
Solar Array ◽  
Math Model ◽  
Operational Conditions ◽  
Supply Systems

The paper discusses transmission, reception, conversion and consumption of energy of laser and microwave radiation from Earth or space power plants. It proposes a classification of advanced systems for remote supply of power to spacecraft (SC). It addresses practicability of using remote power supply to SC under various operational conditions. The paper formulates the problem of evaluating the capability of the existing SC power supply systems to receive and convert emissions from additional sources. An analysis of criteria for the quality of pulsed or rapidly varying flow of energy into a SC power supply system. It reviews the structures of typical channels of power consumption in a SC power supply system. An equivalent circuit replacing receivers of pulsed or rapidly changing radiation is described. A math model is proposed for a power consumption channel operating under conditions of intermittent power supply to photovoltaic converters. Math modeling results are presented and analyzed. Key words: space power plant, solar array, onboard power supply system, power consumption channel, voltage converters.

scholarly journals Improving Hybrid Power Supply System for Telecommunication Service Providers in Nigeria

2021 ◽  
Vol 9 (12) ◽  
pp. 1493-1500
Author(s):  
Odudu O. C.
Keyword(s):  
Renewable Energy ◽  
Power Supply ◽  
Power Supply System ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Supply System ◽  
Base Stations ◽  
Diesel Generator ◽  
Hybrid Power ◽  
Rivers State

Abstract: The aim of this research is to use a combination of renewable energy sources and conventional diesel generator to model a cost effective, alternative energy source for telecommunication base stations in Nigeria. Actually, this study uses various theoretical and mathematical modelling tools, such as, Mat lab Simulink and HOMER software. In the same way, the study references several Base Transceiver Stations (BTS) from gsm providers at select geographical locations in Rivers State. The study references BTS infrastructure in locations such as Ogoni, Port Harcourt and Emohua. These locations were selected to reflect different climatic conditions in Rivers state. Against this background, various hybrid combinations comprising at least two sources of renewable energy e.g Wind Turbine generator(WTG) and Solar Photovoltaic (SPV) were modelled. Also, Fuzzy logic optimization algorithm was used in tracking the maximum power in the SPV. A sample Diesel Generator(DG) was studied to analyze which possible combination gives optimum performance and is most cost effective. The total cost for installation and maintenance of the hybrid system was also considered. Consequently, one of the common negative effects of conventional power generation and usage, which is environmental pollution, was also highlighted during the study. In the course of this research, Homer was used to model a hybrid system in which the initial capital Cost (ICC) was N101,517,040 for 96 nos battery, 1 no 10kw WTG, 1 no hydro-turbine, 48 nos converters, labour etc. The replacement cost for component has a depreciation of 30%; while maintenance for diesel is 30% of the ICC. Eventually, the results obtained from the simulations showed that with an increase in supply from renewable energy sources the overall cost spent when compared to using a diesel generator only is cut by 50%, while the pollution effects also dropped. In fact, the cost also reduces if the renewable energy system is designed efficiently to track and harness maximum power. Furthermore, it is also evident that the location of the base station site and the availability of Renewable energy source affects the efficiency and cost of the entire system. Hence, it is recommended that any telecommunication company which intends installing a hybrid power system for its base stations must carry out detailed feasibility studies using input parameters described here; especially, as it relates to siting of base stations in rural off-grid areas. Keywords: Hybrid Power Supply System

scholarly journals Overvoltages on power filters under energizing industrial power system transformer

2020 ◽  
Vol 6 (2) ◽  
pp. 97-103
Author(s):  
Yuriy Varetsky ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Arc Furnace ◽  
Filter Performance ◽  
Power Filters ◽  
Arc Furnaces ◽  
Filter Tuning ◽  
Manufacturing Tolerances ◽  
The Impact ◽  
Supply Systems

The practice of operating industrial power supply systems containing filter circuits has shown that filter tuning can have a significant impact on filter performance. On the basis of simulations of a real power supply system carried out by the Matlab / Simulink package, the results of a study of the impact of filter manufacturing tolerances on the filter transients under transformer energizing are presented. The most severe transients are observed for filter circuits in the power supply systems of electric arc furnaces due to frequently repeated operating energizing furnace transformers. This article summarizes the analysis of overvoltages on capacitors and reactors for various configurations of the filter circuit, arising during energizing the arc furnace transformer, taking into account the possible detuning of the filters.

scholarly journals MODELING TRACTION NETWORKS WHEN PASSING HEAVY TRAINS

2020 ◽  
Vol 2020 (1) ◽  
pp. 207-208
Author(s):  
Andrey Kryukov ◽  
Evgeniy Bezridnyy
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Harmonic Distortion ◽  
Current Collectors ◽  
Traction Network ◽  
External Power ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Computer Studies ◽  
Traction Power

The results of computer studies of the modes of traction power supply systems when passing trains weighing 12,000 tons are presented. The parameters are compared with the situation when trains are moving weighing 3,000 tons. It is shown that increasing the mass of trains with the same traffic volume leads to an increase in currents in the traction network, a decrease in voltage at the current collectors, the growth of asymmetry and harmonic distortion in the external power supply system

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