Safety of power transformers, power supply units and similar

2015 ◽  
Keyword(s):  
Power Supply ◽  
Power Transformers

Study of power transformer loading in rural power supply systems

2021 ◽  
Vol 13 (4) ◽  
pp. 282-289
Author(s):  
I. V. Naumov ◽  
D. N. Karamov ◽  
A. N. Tretyakov ◽  
M. A. Yakupova ◽  
E. S. Fedorinovа
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Rural Areas ◽  
Power Transformer ◽  
Electric Energy ◽  
Power Transformers ◽  
Electric Networks ◽  
Load Factors ◽  
Optimal Load ◽  
Supply Systems

The purpose of this study is to study the effect of loading power transformers (PT) in their continuous use on their energy efficiency on a real-life example of existing rural electric networks. It is noted that the vast majority of PT in rural areas have a very low load factor, which leads to an increase in specific losses of electric energy when this is transmitted to various consumers. It is planned to optimize the existing synchronized power supply systems in rural areas by creating new power supply projects in such a way as to integrate existing power sources and ensure the most efficient loading of power transformers for the subsequent transfer of these systems to isolated ones that receive power from distributed generation facilities. As an example, we use data from an electric grid company on loading power transformers in one of the districts of the Irkutsk region. Issues related to the determination of electric energy losses in rural PT at different numerical values of their load factors are considered. A computing device was developed using modern programming tools in the MATLAB system, which has been used to calculate and plot the dependence of power losses in transformers of various capacities on the actual and recommended load factors, as well as the dependence of specific losses during the transit of 1 kVA of power through a power transformer at the actual, recommended and optimal load factors. The analysis of specific losses of electric energy at the actual, recommended and optimal load factors of PT is made. Based on the analysis, the intervals of optimal load factors for different rated power of PT of rural distribution electric networks are proposed. It is noted that to increase the energy efficiency of PT, it is necessary to reduce idling losses by increasing the load of these transformers, which can be achieved by reducing the number of transformers while changing the configuration of 0.38 kV distribution networks.

scholarly journals ANALYSIS OF ELECTROMECHANICAL POWER TRANSFORMERS APPLIED IN SMALL HYDROENERGETICS / MAŽOJOJE HIDROENERGETIKOJE NAUDOJAMŲ ELEKTROMECHANINIŲ JĖGOS TRANSFORMATORIŲ ANALIZĖ

2018 ◽  
Vol 10 (0) ◽  
pp. 1-4
Author(s):  
Mariam Saghatelyan ◽  
Marija Meišutovič-Akhtarieva
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Climatic Condition ◽  
Fish Farming ◽  
Power Transformers ◽  
Small Hydropower ◽  
Power Sources ◽  
Ecological Damage ◽  
Hydropower Plants ◽  
Different Types

At present, in Armenia, hydraulic resources of slow-flowing rivers allow to solve the problem of power supply to small consumers rather efficiently. The electric power generated in small hydropower plants has the lowest prime cost in comparison with that of the power generated by other renewable and traditional power sources. At their construction, in contrast to powerful hydropower plants, the ecological damage (land flooding, destruction of fish farming, the change in the balance of the local climatic condition, etc) are practically excluded. In the present work, issues on applying different types of electric generators in small hydroenergetics are considered. The main advantages, disadvantages and also recommendations on applying electrical generators at their utilization in small hydropower plants are introduced. The developed external damper system for the synchronous hydro aggregate is introduced.

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