Water Level Control of Small-scale Hydroelectric Power Plant

2002 ◽  
Vol 122 (6) ◽  
pp. 989-994
Author(s):  
Shinichiro Endo ◽  
Masami Konishi ◽  
Hirosuke Imabayashi ◽  
Hayami Sugiyama
Keyword(s):  
Power Plant ◽  
Water Level ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Level Control

Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant

2011 ◽  
Vol 59 (4) ◽  
pp. 569-574 ◽  
Author(s):  
K. Kulikowski ◽  
A. Sikorski
Keyword(s):  
Power Plant ◽  
Control Method ◽  
Induction Machine ◽  
Hydroelectric Power Plant ◽  
Switching Frequency ◽  
Efficiency Improvement ◽  
Hydroelectric Power ◽  
Static State ◽  
Switching Power ◽  
Sinusoidal Shape

Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant The paper presents a description of a new DTFC3L3A (direct torque and flux control three levels three areas) control method of induction machine as well as its comparison with the DTC method. The basis for the comparison is the switching frequency of described methods. The proposed method is optimized to reduce number of switchings (which is proportional to switching power losses) in static state, as well as it takes into account the δ angle which makes it possible to obtain a sinusoidal shape of flux within range of low angular frequencies of an asynchronous machine. The paper includes the results of experiments performed on a three level DC/AC inverter for both control methods.

scholarly journals Performance of rotational speed controlled small-scale head-dependent hydroelectric power plant

2008 ◽  
Vol 1 (06) ◽  
pp. 500-501
Author(s):  
Tuomo Lindh ◽  
◽  
Risto Tiainen ◽  
Jero Ahola ◽  
Markku Niemela ◽  
...  
Keyword(s):  
Power Plant ◽  
Rotational Speed ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Hydroelectric Power

scholarly journals Design and Construction of Single Phase Radial Flux Permanent Magnet Generators for Pico hydro Scale Power Plants Using Propeller Turbines in Water Pipes

2020 ◽  
Vol 188 ◽  
pp. 00006
Author(s):  
Eko Yohanes Setyawan ◽  
Yusuf Ismail Nakhoda ◽  
Awan Uji Krismanto ◽  
Lalu Mustiadi ◽  
Erkata Yandri ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Permanent Magnets ◽  
Water Pressure ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Special Profile ◽  
Water Turbine ◽  
Main Components

Pico hydro or a small scale hydroelectric power plant is used as the rotating energy of the generator. Pico hydro is a hydroelectric power plant that has a power of less than 5 kW. Technically, Pico hydro has three main components namely water, turbine and generator. Turbine type propeller reaction has a special profile that causes a decrease in water pressure during the blades. This pressure difference exerts force on the blade so that the runner (rotating part of the turbine) can rotate. Permanent magnets are used to produce magnetic flux. Permanent magnets used are rare-eatrhrod magnet material, neodymium-iron-boron NdFeB with N35 type. The planned generator released is 36.85 V, 500 rpm, 50 hz. This designed water turbine has four blades which cannot change its angle. As for the measurement results produce a voltage of 35.1 V with a manufacturing efficiency of 95 %. Charging the battery voltage must be more than 12 V, therefore the generator must be turned at least 200 rpm with a voltage of 14 V to be used for charging batteries.

Vibration Characteristics of a 50MW Francis Type Hydro Power Plant

2018 ◽  
Author(s):  
Y. Cho ◽  
Y. R. Oh ◽  
J. W. Choi ◽  
Y. J. Kim ◽  
J. Novotny ◽  
...  
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Vibration Characteristics ◽  
Operating Conditions ◽  
Scale Model ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Rotating Shaft ◽  
Engineering Structures ◽  
Hydro Power

Vibration characteristics of the rotating machinery has been usually managed to facilitate the deterioration of the equipment and to prevent accident in advance. In a hydropower turbine, pressure pulsation characteristics to induce vibration is investigated during the model testing with a small scale model turbine for various operating conditions, and a prototype turbine is constructed to operate stably on the site. However, the model test has limitation that can’t be considered together with the vibration characteristics of a generator itself and of civil engineering structures for the building that support a turbine and a generator. Therefore, field tests of vibration for a hydroelectric power plant are carried out periodically, thereby maintaining reliability for safe operation of power generation facilities. In the study, the vibration of a Francis type hydroelectric power plant operated over 30 years and overhauled a year and a half ago was measured and its characteristics has been investigated. Displacement and velocity sensors were installed at appropriate positions to measure the vibration of the rotating shaft and bearing support of a turbine and a generator, and the vibration characteristics of a typical hydroelectric power plant have confirmed by analyzing the measurement results. The vibration characteristics of rotating shaft and non-rotating parts of the hydroelectric turbine have been analyzed to confirm the degree of aging of the plant. Vibration in the power plant building depending on the operating conditions was also measured to be large enough to sense, and its frequency characteristics were analyzed.

scholarly journals Problems, methods and technologies of combined 3D model construction for underwater and above-water relief

2020 ◽  
Vol 149 ◽  
pp. 02002
Author(s):  
Andrey Gachenko ◽  
Alexei Hmelnov
Keyword(s):  
Power Plant ◽  
Water Level ◽  
Water Flow ◽  
Lake Baikal ◽  
3D Model ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Delaunay Triangulations

In the article we describe the methods for construction of underwater 3D relief (bathymetry) and combining it with the corresponding ground relief (terrain) when the bathymetry information is of much lower quality than that of terrain. We have developed an algorithm for combining the low quality underwater relief with the higher quality ground relief using Delaunay triangulations. The resulting combined 3D model of relief has no noticeable artifacts and can be used to solve various hydrological tasks, such as computation of the HPP reservoir water level in dependence to the water discharges of the hydroelectric power plant. We have tested the technology for building combined relief 3D model in several scientific projects intended to estimate the changes in the coastline under various water flow scenarios in the basins of Angara River and Lake Baikal.

scholarly journals WATERMILL AND SMALL-SCALE HYDROELECTRIC POWER PLANT LANDSCAPES ASSESSED ACCORDING TO ECOLOGICAL ASPECTS / VANDENS MALŪNŲ IR MAŽŲJŲ HIDROELEKTRINIŲ KRAŠTOVAIZDŽIO VERTINIMAS EKOLOGINIAIS ASPEKTAIS

2013 ◽  
Vol 5 (3) ◽  
pp. 266-274 ◽  
Author(s):  
Lilita Lazdāne
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Field Studies ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Local Planning ◽  
Ecological Aspects ◽  
Distribution Ranges ◽  
Landscape Character ◽  
Definition Of

Research of watermill and small-scale hydroelectric power plant (HPP) landscapes in Latvia according to ecological aspects is a part of a more complex research. The aim of this research is to examine the existing situation of watermill and small-scale HPP landscapes in Latvia by applying the ecological assessment criteria, and then try to formulate a definition of common tendencies of the landscape character. This paper provides a landscape inventory matrix for research in the field studies of landscape identification at the local planning level. The duration of the research was from 2010 to 2012. The research includes 42 territories starting with the three most densely developed areas in Latvia: in Latgale, Kurzeme and Vidzeme uplands distribution ranges. The research results reflect tendencies of the landscape features assessed according to the previously developed criteria of ecological aspects. Santrauka Latvijos vandens malūnų ir mažųjų hidroelektrinių kraštovaizdžio vertinimo ekologiniais aspektais tyrimas yra kompleksinio tyrimo dalis. Tyrimo tikslas yra įvertinti esamą vandens malūnų ir mažųjų hidroelektrinių kraštovaizdžio situaciją ekologiniais aspektais ir išryškinti bendrąsias kraštovaizdžio charakterio tendencijas. Straipsnyje atspindėta kraštovaizdžio inventorizavimo matrica kraštovaizdžiui identifikuoti planavimo lygmeniu. Tyrimas atliktas 2010–2012 metais. Tyrimas apima 42 teritorijas, išsidėsčiusias trijose tankiausiai apgyvendintose Latvijos dalyse: Latgaloje, Kuržemėje ir Vidžemėje. Remiantis anksčiau suformuluotais kriterijais kraštovaizdžiui tirti ekologiškumo aspektais, tyrimo rezultatai atskleidžia tam tikras tendencijas.

scholarly journals Energy price-based control strategy of a small-scale head-dependent hydroelectric power plant

2008 ◽  
Vol 1 (06) ◽  
pp. 514-519
Author(s):  
Risto Tiainen ◽  
Tuomo Lindh ◽  
Jero Ahola ◽  
Markku Niemela ◽  
Ville Sarkimaki
Keyword(s):  
Power Plant ◽  
Control Strategy ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Energy Price ◽  
Hydroelectric Power

Hydroelectric Power-Plant Simulator Implemented in Python

2021 ◽  
Author(s):  
Michal Kuchar ◽  
Adam Peichl ◽  
Milan Kucera ◽  
Jaromir Fiser ◽  
Pavel Kulik ◽  
...  
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power
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