Independent electrical power supply of river bridges and objects adjacent to them

2019 ◽  
pp. 545-550
Author(s):  
Konstantin Kim ◽  
Mikhail Gerasimov ◽  
Aleksandr Smirnov
Keyword(s):  
Traffic Safety ◽  
Power Supply ◽  
Electrical Power ◽  
Practical Importance ◽  
Electric Energy ◽  
Cost Effective ◽  
Electric Transport ◽  
Hydroelectric Power ◽  
Power Stations ◽  
Traction Network

Objective: To improve traffic safety, reduce the environmental impact and to save electricity by using the energy of river flows to supply river bridges with power. Methods: A renewable and quite cost- effective source of electric energy can be obtained by using small hydroelectric power stations (GES). A project on installation of small submersible GES on the bridge footings over the Neva River in Saint Petersburg is described in the given article. Results: The powers of hydraulic turbines for each bridge were calculated based on their energy consumption and the number of possible turbine installation places. Practical importance: It is supposed to give generated electric power to the traction network of electric transport or to accumulate it in storages providing power supply of a nearby infrastructure at any time. In addition, strengthening of the present distribution network within the city by means of the additional sources of electricity will be provided.

scholarly journals MANAGEMENT FACILITIES BY GENERATION AND CONSUMPTION OF ELECTRIC ENERGY IN ELECTROENERGY SYSTEMS WITH THE UP-DIFFUSED GENERATION TAKING INTO ACCOUNT FACTOR OF VAGUENESS OF WEATHER AND CLIMATIC TERMS

2020 ◽  
pp. 95-99
Author(s):  
А. Cherniuk ◽  
І. Kirisov ◽  
Ye. Kachanov
Keyword(s):  
Electric Power ◽  
Wind Power ◽  
Power Supply ◽  
Technical Problem ◽  
Electric Energy ◽  
Hydroelectric Power ◽  
Power Station ◽  
Power Stations ◽  
Characteristic Modes

The analysis of process of generation, transmission, distribution and consumption of electric energy is conducted in the electroenergy systems with the up‑diffused generation. The features of the characteristic modes of operations of objects of the up‑diffused generation and their influence are considered on reliability of power supply and quality of electric energy indexes for consumers. Certainly, that the process of generation of electric energy the sources of the up‑diffused generation and process of consumption of electric energy largely depend on weather and climatic terms and is characterized the substantial level of vagueness that negatively influences on drafting of balance of mine‑out and consumed electric energy. It is certain that possible not‑balance in the process of power supply of consumers substantially worsens the indexes of quality of electric energy in a network. It is indicated on actuality of this scientific and technical problem and possible methods and backer‑ups of reliability of power supply and quality of electric energy indexes are certain in networks with the up-diffused generation. Influence of weather terms is analysed on the process of generation of electric energy and climatic terms sunny and wind power-stations on the process of generation of electric energy small and the hydroelectric power and power-stations that work as on the basis of biogas technologies and organic proceeded in primary fuel. The features of generation of electric power the indicated types of power station and possible prognosis indexes that will influence on the process of management these objects of the up‑diffused generation are certain. Facilities and management backlogs are certain by a generation and consumption of electric energy in electroenergy networks with the up‑diffused generation. General conception of choice and development of management facilities offers by the process of power supply in the systems with the up‑diffused generation that takes into account the factors of considerable vagueness of entry parameters and based on the theory of construction of the reliable systems from unreliable elements.

scholarly journals MODELING OF COMPATIBLE WORK OF DISTRIBUTED POWER SOURCES OF ELECTRIC POWER AND CENTRALISED POWER SUPPLY

2018 ◽  
pp. 189-195
Author(s):  
Petro Lezhnyuk ◽  
Iryna Hunko ◽  
Juliya Malogulko ◽  
Iryna Kotylko ◽  
Lіudmyla Krot
Keyword(s):  
Power Supply ◽  
Power Plants ◽  
Solar Power ◽  
Energy Sources ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Distributed Energy ◽  
Power Stations ◽  
Asynchronous Generator ◽  
Solar Power Plants

Urgency of the research. Current trends of distributed generation development in Ukraine indicate a rapid generation in-crease from renewable energy plants. Most developed countries gradually refuse from the fossil fuels use and invest more and more to the “green” energy. Therefore, there is a need for a detailed study of the operation conditions of distributed energy sources due to their instability, as well as the processes that arise in distribution electric networks with diverse types of distributed energy sources. Target setting. In the producing process of power energy by distributed energy sources due to the increase in their num-ber, there are situations where several renewable sources of energy operate to only one system of buses. Thus, such distributive networks acquire the features of a local power system, which complicates the control process of such systems, and also there is a problem with the electricity supply of consumers. Actual scientific researches and issues analysis. The analysis of publications suggests that in literature more attention is paid to studying the operating modes of solar power plants, or small hydroelectric power plants. However, almost no attention was paid to the study of their cooperation work. Uninvestigated parts of general matters defining. Only a few works are devoted to the study of the cooperation of the diverce sources of distributed energy sources in the local electrical systems. That is why, their impact on power distribution networks and on the grid in general has not been studied extensively. The research objective. In this article was considered the influence of asynchronous generators on small hydroelectric power plants on the operation modes of distribution electrical networks, and were investigated the processes that are occurring in local power systems with different types of distributed energy sources. The statement of basic materials. Based on the research results, was developed a computer model of a such system in the PS CAD software environment. Two solar stations and one small hydroelectric power station with an asynchronous generator were connected to the power supply. It was shown the simulation of two modes of operation: a joint operation of a small hydroelectric power station, two solar power stations and a power supply center; a joint operation of a small hydroelectric pow-er plant, two solar power stations and a power supply disconnected. Conclusions. As a result of computer simulation, it is shown that by switching on a small hydroelectric power plant with an asynchronous generator in the case of an emergency shutdown of centralized power supply, it is possible to restore the work of solar power plants, and thus partially or completely restore the power supply of consumers.

scholarly journals Engineering Solutions to Enhance Traffic Safety Performance on Two-Lane Highways

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Lina Wu ◽  
Jiangwei Chu ◽  
Yusheng Ci ◽  
Shumin Feng ◽  
Xingwang Liu
Keyword(s):  
Traffic Safety ◽  
Empirical Bayes ◽  
Practical Importance ◽  
Cost Effective ◽  
Highway Safety ◽  
Safety Performance ◽  
Highway Traffic ◽  
Research Attention ◽  
Research Perspectives ◽  
Sight Distance

Improving two-lane highway traffic safety conditions is of practical importance to the traffic system, which has attracted significant research attention within the last decade. Many cost-effective and proactive solutions such as low-cost treatments and roadway safety monitoring programs have been developed to enhance traffic safety performance under prevailing conditions. This study presents research perspectives achieved from the Highway Safety Enhancement Project (HSEP) that assessed safety performance on two-lane highways in Beijing, China. Potential causal factors are identified based on proposed evaluation criteria, and primary countermeasures are developed against inferior driving conditions such as sharp curves, heavy gradients, continuous downgrades, poor sight distance, and poor clear zones. Six cost-effective engineering solutions were specifically implemented to improve two-lane highway safety conditions, including (1) traffic sign replacement, (2) repainting pavement markings, (3) roadside barrier installation, (4) intersection channelization, (5) drainage optimization, and (6) sight distance improvement. The effectiveness of these solutions was examined and evaluated based on Empirical Bayes (EB) models. The results indicate that the proposed engineering solutions effectively improved traffic safety performance by significantly reducing crash occurrence risks and crash severities.

scholarly journals The method of calculating power supply for monitoring and metering devices of DC traction network based on serial chain of voltage converters

2021 ◽  
pp. 41-45
Author(s):  
Yu. V. Plotnikov ◽  
Keyword(s):  
Power Supply ◽  
Electric Energy ◽  
Power Source ◽  
Equivalent Source ◽  
Full Scale Experiment ◽  
Serial Chain ◽  
Traction Network ◽  
Railway Traction ◽  
Calculation Results ◽  
Scale Experiment

For organization of power supply of devices for monitoring and accounting of electric energy for railway traction networks of direct current, the topology of the power source based on a serial chain of voltage converters can be used. The paper considers the development of a methodology for the electrical calculation of such sources. For this purpose, lists of initial data and calculation results are formed. A substitution scheme of ideal elements is proposed. The operation of the substitution scheme is analyzed using the «equivalent source» method. It also provides formulas and recommendations for selecting and determining the required parameters. The adequacy of the proposed method is confirmed by a full-scale experiment

scholarly journals Velocity and turbulence affected by various vegetations in open channel

2021 ◽  
Vol 248 ◽  
pp. 03078
Author(s):  
Zhilin Sun ◽  
Xin Meng ◽  
Yubao Zhou
Keyword(s):  
Energy Source ◽  
Laboratory Experiments ◽  
Open Channel ◽  
Electric Energy ◽  
Hydroelectric Power ◽  
High Quality ◽  
Power Stations ◽  
Rigid Vegetation ◽  
Flexible Vegetation ◽  
Wooden Stick

Water energy is a conventional source of source that is widely available in nature. It can be easily converted into high quality secondary energy-electric energy through hydroelectric power stations. Hydropower is not only a widely used conventional energy source, but also a renewable energy source. Moreover, hydroelectric power has no pollution to the environment. Therefore, water energy is an inexhaustible and high-quality energy source among many energy sources in the world. However, vegetation can change flow structure and turbulence characteristics, impacting the use of water energy. In previous researches, few studies have focused on the comparison of velocity and turbulence influenced by various vegetations. Therefore, laboratory experiments were carried out to investigate hydrodynamics affected by submerged rigid vegetation (reed and wooden stick) and merged flexible vegetation (grass and chlorella) under different conditions. The time-averaged velocity distributions of planted floodplain are not logarithmic. Instead, reed and wooden stick followed an “S-shape” profile, but for grass and chlorella, they presented reverse S-shape profile. For all cases, turbulence is not isotropic and the change law of turbulence intensity is different in different sections.

scholarly journals The concept of a hybrid traction power supply system

2019 ◽  
Vol 294 ◽  
pp. 01014 ◽  
Author(s):  
Viktor Sychenko ◽  
Valeriy Kuznetsov ◽  
Yevheniy Kosarev ◽  
Petro. Beh ◽  
Yuriy Sayenko ◽  
...  
Keyword(s):  
Power System ◽  
Distributed Generation ◽  
Power Supply ◽  
Power Supply System ◽  
Electric Energy ◽  
Supply System ◽  
Rolling Stock ◽  
Specific Power ◽  
Traction Network ◽  
Traction Power

The growing shortage of energy resources to provide heavy traffic and high-speed traffic necessitates the development of a new power supply scheme for a traction network using sources of distributed generation of electric energy. Application of asymmetric distributed traction power system with the use of distributed generation allows to increase electric energy efficiency of the feed system of rolling stock, reduce its material capacity and increase the reliability of the functioning of the railway system as a whole. The proposed structure of the hybrid electric traction system involves the creation of a new paradigm aimed at ensuring high demands on the voltage and specific power in the traction network, which will allow to improve the quality and safety of the transportation process when increasing the energy performance indicators. This paradigm will allow to form a new philosophy of building traction power systems. The key elements of this philosophy are decentralization of generation and consumption of electric energy, the use of intelligent electric equipment, distributed power supply management in a single information space of the energy process during transportation. The peculiarity of the proposed work is the optimal combination of technological processes of transmission, consumption of electric energy and transportation, taking into account the specific conditions of functioning of the electrified section: points of connection of power sources and their type, profile of the track, schedule of trains, types of rolling stock and equipment. Conceptually, the hybrid traction power system is an electric hub, in which the inputs are generating points, and the output is the power supply system of the rolling stock. The internal structure of the electric power objects of the hub is determined by the type of transformation and accumulation of electric energy and ways of managing these objects in real time.

scholarly journals Geoecology of small hydroelectric power stations on the rivers of the Moscow region, Russia

2019 ◽  
Vol 265 ◽  
pp. 06009
Author(s):  
Veronika Luchkina ◽  
Nikita Pronin ◽  
Sergei Kondratiev
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Thermal Power ◽  
Ecological Factors ◽  
Moscow Oblast ◽  
Hydroelectric Power ◽  
Degree Of Protection ◽  
Power Stations ◽  
Thermal Power Stations ◽  
Hydropower Potential

The aim of this paper is validation of possibility of using hydropower potential of local drops in water supply and water disposal systems of large enterprises and thermal power stations, reservoirs and other structures located on the territory of Moscow and Moscow Oblast; also there validated the possibility and feasibility of their hydropower potential use and consideration of geo-ecological factors such as geological setting and composition of soils on the territories of weirs, presence of forest vegetation, sorption characteristics and composition of soils significantly affecting the degree of protection of live streams against pollution. Therefore, they should be taken into consideration at conducting comprehensive assessment of the springs condition. Units of small HPPs may be installed at spillage of clarified water from sedimentation basins of thermal power stations, water purification facilities. Construction of small HPPs of such types should be realized within the frame of energy efficiency policy. Apart from incorporation of energy efficiency technologies they may contribute in power supply of enterprises at which they are constructed. Such stations may serve as a power supply reserve of certain consumers.

scholarly journals Analysis of causes of failures in 10 kV electrical power distribution networks (on the example of the Southern electrical networks of the city of Irkutsk)

2019 ◽  
Vol 11 (4) ◽  
pp. 299-304
Author(s):  
I. V. Naumov ◽  
E. V. Karpova
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Large Scale ◽  
Electrical Power ◽  
Electric Energy ◽  
Distribution Networks ◽  
Economic Damage ◽  
Left Bank ◽  
Electrical Networks ◽  
Wide Range

Disconnection of power consumers from power grids is quite a common event, with a wide range of consequences. Power supply interruptions can be caused by both casual events, and planned shutdowns. Disruptions in systems of power supply of consumers lead to a variety of adverse events (under-delivery of products, large-scale product rejection, failure of production equipment, etc.), which inflicts a significant economic damage. The retrospective analysis of the failure rate of electrical networks of the Right Bank and Left Bank districts of Irkutsk over 2013–2017 has been carried out. The analysis was based on the data from dispatching logs of observations on events of failures caused by emergency damage to the Southern electrical networks. It is established that the greatest number of failures occurs for such reasons as damage at substations, damage to consumer electrical networks, wire breakage in air and cable power lines as well as damage of switching equipment. Failures related to wind load, damage at packaged transformer substations, insulators and surge arresters are also analysed. The percentage rate of failures of electrical power networks caused by specific reasons from the total number of failures is presented. Besides, the analysis is performed of the duration of interruptions of power supply owing to damage of individual elements of power network equipment as well as the amount of electric energy undelivered for these reasons, and financial losses caused by these failures due to under-delivery of electric energy, with the average wholesale electricity prices taken into account.

scholarly journals Simulation modeling balancing current in the traction network of a substation group

2020 ◽  
Vol 178 ◽  
pp. 01067
Author(s):  
Valerij Li ◽  
Yuliya Konstantinova
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Single Phase ◽  
Electrical Power ◽  
Supply System ◽  
Power Losses ◽  
Traction Network ◽  
Traction Substations ◽  
External Power ◽  
Symmetrical Load

This article is devoted to assessing the transit of electricity from an external electrical power supply system through the traction network of a railway district that includes nine traction substations. Substation transformers has star-delta-11 connection. The paper presents a simulation model of the railway district implemented in the MATLAB/Simulink software package. Various options of loading the external power supply system are modeled including into account the symmetrical load of the external network and the single-phase load of traction substations. The values of the voltage difference on the traction windings of power transformers of adjacent substations that occurs at different loads, the balancing currents that this difference creates and real power losses in the inter-substation areas are calculated.

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