DYNAMIC LOAD ON CYLINDER SURGE TANKS OF DIVERSION HYDROELECTRIC POWER STATIONS UNDER SEISMIC IMPACT

2017 ◽  
Vol 7 (1) ◽  
pp. 64-69 ◽  
Author(s):  
Yury E. SENITSKU ◽  
Mikhail I. BALZANNIKOV ◽  
Andrey A. MIKHASEK
Keyword(s):  
Dynamic Load ◽  
Water Pressure ◽  
Hydroelectric Power Station ◽  
Mountainous Area ◽  
Design Calculation ◽  
Hydroelectric Power ◽  
Surge Tank ◽  
Power Stations ◽  
Water Conveyance ◽  
Seismic Impact

The necessity of construction of surge tanks for diversion hydroelectric power stations with pressure derivation is substantiated in the article. These tanks as a part of water-conveyance headrace are essential to protect a long pressure tunnel from pressure boost under hydraulic shock and in consequence from additional charges for tunnel walls underpinning. It is to be noted that diversion hydroelectric power stations are often erected in mountainous area and surge tanks are situated on the turning point of water-conveyance headrace. This position allows to lower surge tank and to keep construction costs down. The examples show that it is preferable to construct surge tanks on the surface of the earth. It is to be noted that these structures constructive elements are exposed to static water pressure and water dynamic load due to water fl ow control through aggregates under power consumption changes of hydroelectric power station . At the same time in mountainous area surge tanks can also be exposed to dynamic loads because of seismic impact. The article gives the solution for determination of impulse and convective components of hydrodynamic pressure at vertical walls of metal cylinder tank in the case of horizontal seismic impact. The proposed solution clarifi es well-known calculation methods and allows to perform an accurate design calculation of potential loads and to choose necessary geometric parameters that ensure tank reliability.

scholarly journals Analysis of floodable areas of the Angara river

2020 ◽  
Vol 223 ◽  
pp. 03002
Author(s):  
Gachenko Andrey ◽  
Hmelnov Alexey
Keyword(s):  
Model Building ◽  
Hydroelectric Power Station ◽  
Application Software ◽  
Hydroelectric Power ◽  
Power Station ◽  
Terrain Model ◽  
Power Stations ◽  
Littoral Area ◽  
Bratsk Reservoir

In this work, the authors present a technology for riverside terrain model building that has been tested on a number of scientific projects to study the littoral area of tail race of the Irkutsk Hydroelectric Power Station and the Bratsk Reservoir. This model is used for forecasting changes in the reservoir shorelines associated with wastewater in the cascade of hydroelectric power stations. The technology described in the work was approved to solve a number of practical problems and showed its effectiveness. Specialized application software was developed and terrain data from various sources were used to specify and detail the end result.

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.

LOCAL STUDIES OF ICE COVER EFFECTS ON DAM GATES

2021 ◽  
Vol 11 (2) ◽  
pp. 62-66
Author(s):  
Sergey V. EVDOKIMOV ◽  
Alexey A. ROMANOV ◽  
Boris G. IVANOV
Keyword(s):  
Power Plants ◽  
Practical Interest ◽  
Full Scale ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Power Stations ◽  
Operation Rules ◽  
Static Operation ◽  
Technical Operation ◽  
Scale Data

The experience of operation of surface emergency gates in ice-breaking conditions at a number of hydroelectric power plants has shown the insuffi cient eff ectiveness of the methods used to combat freezing of structures. The rules for technical operation of spillway dam gates in winter provide for heating of structures by slots, threshold and skin in conjunction with measures to maintain mines before construction. However, measures to heat gates and build mines are not always suffi ciently justifi ed and justifi ed. In order to obtain full-scale data and scientifi c information for the development of recommendations on operating and accounting modes during design, full-scale studies of stresses and defl ections in the load-bearing elements of the watershed gate of the hydroelectric power station were carried out. This article presents the results of fi eld studies in comparison with calculated values. As a result of the studies, information on the static operation of fl at gates in winter conditions is obtained, which is of theoretical and practical interest. The materials can be used to clarify technical operation rules and to clarify regulatory documents for the design of hydromechanical equipment at hydroelectric power stations.

Excavation Stability Analysis for Consequent Rock Slope of Hydroelectric Power Station

2011 ◽  
Vol 94-96 ◽  
pp. 1793-1799
Author(s):  
Xu Dong Li ◽  
Chao Su
Keyword(s):  
Stability Analysis ◽  
Plastic Zone ◽  
Rock Slope ◽  
Hydroelectric Power Station ◽  
Point Problem ◽  
Hydroelectric Power ◽  
Power Stations ◽  
Earth Slope ◽  
The Stability ◽  
Coulomb Criterion

Many hydroelectric power stations are constructed on rock foundations. Therefore, the stability of rock slope is critical for the engineering especially in the excavation state. The analysis for consequent rock slopes is not identical with the earth slope because of their material characteristics. In this paper, it is combined the elastic-plastic finite element method and safe factor strength reduction method for the solution of problem. Considering the multi-layer material of the rock slope, Drucker- Prager criterion is adopted for determining the yield station which has the modified format of Morh-Coulomb criterion overcome the corner point problem of application proper for rock material. The conditions both of displacement mutability and cut-through of plastic zone are described in detail and research deep for failure judged. Analysis and compare of the situations which contain displacement, plastic zone between pre-excavation and post-excavation by certain numerical example, some useful results are given for stability analysis of consequent rock slope.

scholarly journals PLANS FOR THE CONSTRUCTION OF THE CHEBOKSARY HYDROELECTRIC POWER STATION IN THE 1940s

2021 ◽  
pp. 127-132
Author(s):  
Elena K. Mineeva ◽  
Nadezhda G. Rusinova
Keyword(s):  
Decision Making ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Labor Costs ◽  
Power Station ◽  
Material Resources ◽  
Power Stations ◽  
Archival Documents ◽  
Scientists And Engineers

In the year of Cheboksary hydroelectric power station’s anniversary, the authors of the article aim to investigate the issue of the waterworks facility’s formation in the early 40s of the last century. Based on the principles of historicism and objective analysis, the main stages of implementing the HPP construction plan are considered. The article presents archival documents which examine the problems of decision-making on the construction of the object. The issue of constructing hydroelectric power stations on the Volga, in particular in the territory of Chuvashia, was studied in the specially created Bureau «The Great Volga». Simultaneously with the construction of Cheboksary HPP, the construction of two more stations – Yaroslav­skaya and Balakhninskaya – was considered. The authors present comparative characteristics of the objects. Cheboksary hydroelectric power plant in terms of its performance significantly exceeded other structures. The article notes that prior to the construction of the station, a lot of preparatory and survey work was carried out, which was limited by a tight deadline. As a result of examining the scope of work, material resources and labor costs, the construction of the station was postponed to a later date. Scientists and engineers recognized the priority need to build less powerful stations. The materials of the article can be used for further research of this topic, as well as when writing regional natural history works.

scholarly journals Response of vegetation to sheep dung addition in a degraded Cerrado area

2019 ◽  
Vol 23 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Danilo S. Teixeira ◽  
Andreia A. Rezende ◽  
Luciola S. Lannes
Keyword(s):  
Functional Groups ◽  
Soil Nutrient ◽  
Nutrient Concentrations ◽  
Soil Conditions ◽  
Hydroelectric Power Station ◽  
Native Vegetation ◽  
Hydroelectric Power ◽  
Power Station ◽  
Power Stations

ABSTRACT Cerrado is the second largest biome in Brazil and is classified as a biodiversity hotspot. The establishment of hydroelectric power stations in Brazil originated degraded areas due to the removal of soil for construction of dams, in which native vegetation sometimes fails to reestablish due to the bad soil conditions. Sheep excrete most of the nutrients they ingest, such as phosphorus, calcium, potassium and nitrogen. This study aimed at investigating whether sheep dung contributes to the improvement of soil quality and stimulates the process of ecological succession in areas affected by the construction of the hydroelectric power station of Ilha Solteira. Four areas were selected, located at the Experimental Farm of Unesp Ilha Solteira/SP, and ten plots of 1 m2 each were established. From October 2014 to December 2015, five replicates received 150 g fresh sheep dung every 15 days. In December 2015 soil sample from top 0.10 m was collected for the determination of soil attributes. Aboveground biomass was also collected, separated into four functional groups, oven-dried and weighed. Data were analysed to check the effect of dung addition upon soil and vegetation variables. Dung addition stimulated the development of several functional groups and changed soil nutrient concentrations in all four studied areas.

scholarly journals The Development of the Utilisation of Water Power in Poland

2004 ◽  
Vol 11 (1) ◽  
pp. 185-194 ◽  
Author(s):  
Zdzisław Mikulski
Keyword(s):  
World War I ◽  
Peak Load ◽  
Total Power ◽  
Medium Size ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Iron And Steel ◽  
Power Stations ◽  
Vistula River ◽  
Pumped Storage

Abstract First hydroelectric power stations in Poland were built in 19th century, mostly in the region of Podhale (Carpathian tributaries of the Vistula River) and in the Old Polish Industrial District (for the needs of the iron and steel industry) from the initiative of Stanisław Staszic. They were used in mills and saw mills, for home lighting in settlements, etc. After World War I two medium size hydroelectric power stations were constructed in Pomerania (Gródek and Żar) and the construction of a dam (at that time the largest in Europe) was started in Rożnów on the Dunajec River (50 MW); the hydroelectric power station was opened as late as 1941. A small growth in this field took place in the 1950s and 1960s, and in the late 1960s / early 1970s large hydroelectric power stations were built (Solina, Włocławek, Żydowo). The largest growth occurred in the late 1980s and early 1990s, when the two giant peak-load, pumped-storage power stations were put into operation (Porąbka-Żar: 500 MW and Żarnowiec: 680 MW), reaching the total power of 2000 MW. The most recent two large installations are: Czorsztyn-Niedzica (92 MW, 1997) and the modernisation of Solina (200 MW, 2003).

scholarly journals Hydroelectric Power Station Concept Explanation in Professional Language Picture of the World

2020 ◽  
Vol 2020 (2) ◽  
pp. 52-62
Author(s):  
Anna E. Mezit
Keyword(s):  
Hydroelectric Power Station ◽  
Conceptual System ◽  
Hydroelectric Power ◽  
Simple Complex ◽  
Power Station ◽  
Power Stations ◽  
Educational Literature ◽  
The World ◽  
Different Types ◽  
Natural Man

The article discusses the features of the linguistic expression of the concept of a hydroelectric power station (HPS). The material for the study is the data of etymological and encyclopedic dictionaries, special educational literature, as well as data obtained during interviews of workers of various Russian hydroelectric power stations, and data from a linguistic experiment. The process of research revealed and described: etymology of the name of the concept; conceptual features of the concept; figurative layer (through the analysis of metaphorical names); evaluation layer of the concept. It has been established that the concept of hydroelectric power station (HPS) refers to gestalt concepts, since it is a conceptual system that combines different types of concepts. The professional linguistic picture of the world of hydropower is characterized by the conceptualization of the conceptual categories of «living – nonliving», «simple – complex», «natural – man-made». The axiological layer of the professional concept is poorly expressed against the background of the conceptual and figurative layers.

scholarly journals Design Aspects of Small-Hydropower Plant

2021 ◽  
pp. 1-9
Author(s):  
Bilal Abdullah Nasir
Keyword(s):  
Alternative Energy ◽  
Hydroelectric Power Plant ◽  
Hydropower Plant ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Small Hydropower ◽  
Hydro Power ◽  
Power Stations ◽  
Generator Type ◽  
System Frequency

Presently, however, Hydroelectric is a source of power that can prove to be available to all, regardless of conditions such as weather. As history showed, a lot of development, as well as alterations, were made to this efficient supply of energy. Hydropower is a positive alternative energy source that nature provides, therefore, its effective usage is not prohibited. Although there are many disadvantages associated with the design and construction of a hydroelectric power plant, the advantageous features are even more enormous. This paper deals with construction and design aspects for the implementation of the small hydroelectric power station. The main parameters can be collected from the site. Then the turbine type and dimensions can be specified. The generator specifications,which is the main part in the system, for hydro-power stations can be obtained from the determination of turbine output power. These specifications involve mainly the rated power in KVA, the type of system, system frequency, the type of stator winding connection, rated load voltage, rated load current, load power factor, generator speed, method of the system cooling, and the generator type of excitation.

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