Operating Modes Optimization of Bulk Electrical Power Networks: Structural and Parametrical Methods

2021 ◽  
pp. 99-119
Author(s):  
Vladislav Kuchanskyy ◽  
Denys Malakhatka ◽  
Artur Zaporozhets
2018 ◽  
Vol 21 (6) ◽  
pp. 54-64
Author(s):  
Alexander V. Kechin ◽  
Alexander V. Levin ◽  
Sergei P. Khaliutin ◽  
Boris V. Zhmurov

The article deals with the issue of providing electric power to the first category receivers in the emergency mode of the power supply systems operation of perspective and modernized aircraft. The analysis of the published scientific works performed both in Russia and abroad, and aimed at solving problems of analyzing abnormal operations mode, synthesizing power supply systems and controlling them in order to prevent dangerous consequences is carried out. The authors considered the ingenious technical solutions aimed at providing the necessary quality power supply for the first category receivers in the emergency operation modes of the aircraft power supply systems for the safe completion of flight and landing. The research analysis and generalization of data on the technical characteristics of units and devices developed by the world's leading manufacturers of aviation equipment and used as emergency sources of electrical power on board modern civil aviation aircraft has been completed. The advantages and disadvantages of each technical solution are determined, as well as limitations to the area of their application are formed. The analysis of perspective emergency sources of the electric power including those, which previously were not applied in aviation because of their insufficient technical perfection, for example, hydrogen electrochemical generators is carried out. Based on the performed analysis, a solution which allows improving the operating modes of the electrical batteries is proposed. The offered solution makes it possible to increase the reliability and durability of electrical batteries, as well as the power supply duration of the first category receivers from them.


2020 ◽  
Vol 15 (55) ◽  
pp. 538-545
Author(s):  
Salwa El-Samanoudy ◽  
El-Said Osman ◽  
Mohamed El-Said ◽  
Mohamed El-Shaer

2018 ◽  
Vol 49 ◽  
pp. 00096
Author(s):  
Paulina Sawicka-Chudy ◽  
Elżbieta Rybak-Wilusz ◽  
Maciej Sibiński ◽  
Ryszard Pawełek ◽  
Marian Cholewa ◽  
...  

In the first part of this paper we present an overview of photovoltaic devices installed in Poland in the years 1960-2015. In the years 2009-2016, approximately 199 MW in total power of photovoltaic devices were installed. The second part of the paper we focus on presenting the research results on the usage of tracking photovoltaic installations in 2010-2016 collected in various periods of their work. PV panels were installed on the building of the Institute of Electrical Power Engineering of the Lodz University of Technology. In this paper we considered PV installations as an additional source of energy improving the total energetic efficiency of the building via the reduction of energy consumed from public electric and power networks. The installation satisfies up to 30% of annual energy demand of laboratories. However, the break-even period of the system was estimated to be about 30 years because of the high cost of installation.


Author(s):  
Osita U. Omeje ◽  
Akintunde S. Alayande ◽  
Tolulope O. Akinbulire ◽  
Frank N. Okafor ◽  
Jude I. Ebelechi

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