Analysis of Possibilities of Using Membrane Electrolyser in a Closed-Circuit Power Supply System

2013 ◽  
Vol 210 ◽  
pp. 9-13
Author(s):  
Grzegorz Grzeczka
Keyword(s):  
Energy Source ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Comprehensive Assessment ◽  
Closed Circuit ◽  
Safe Operation ◽  
Advantages And Disadvantages ◽  
The Future ◽  
Circuit Power

The issue of using hydrogen as an energy source of the future raises greater and greater interest and lively discussions. Frequently, leaving aside complexity of the problem, these discussions focus exclusively on fragmentary analyses. This presentation is a description of practical and comprehensive assessment of an actual efficiency of a system using hydrogen for supplying energy in mobile arrangements of a power in the region of a dozen watts. In our discussion, emphasis was placed on the analysis of advantages and disadvantages taking into consideration all these aspects that are necessary for the correct and safe operation of the system.

scholarly journals Determination of Service Areas of Urban Transformer Substations and Distribution Using Geometrical Templates

2009 ◽  
Vol 46 (6) ◽  
pp. 16-26 ◽  
Author(s):  
S. Guseva ◽  
N. Skobeleva ◽  
N. Breners ◽  
O. Borscevskis
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Service Area ◽  
Rational Use ◽  
The Future ◽  
Service Areas ◽  
The City ◽  
Reconstruction Time

Determination of Service Areas of Urban Transformer Substations and Distribution Using Geometrical Templates In the work, a general and theoretically substantiated approach is proposed for the arrangement and determination of service areas for the future transformer substations (TSs). The modelling of TS service area has been performed, with geometrical templates designed to arrange TSs in the city building territory. The sizes of templates have been obtained depending on the TS capacity and load density in TS service area. The geometrical templates are to help in TS arrangement in view of rational use of the city territory and to re-arrange the existing stations for the reconstruction time. As a result, the urban power supply system will develop not chaotically but in a purposeful manner.

scholarly journals Research on Safety of Mine Power Supply System

2021 ◽  
Vol 252 ◽  
pp. 02008
Author(s):  
Chen Weihua ◽  
Shan Renzhong ◽  
Bai Cuifen ◽  
Zhang Youdong
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Power Supply System ◽  
Research Direction ◽  
Supply System ◽  
The Future

Electric power is one of the main supplies of mine energy. The safety of electric power is of great significance to the safety of mines. The probability of blackout is relatively small. But once it happens, the harm is great. In order to improve the safety of mine power supply, this paper summarizes the research on the safety of mine power supply system, puts forward the research direction, and prospects the development of mine power security in the future.

scholarly journals AN EXAMPLE OF CALCULATION OF A FAULT TREE WITH LOGIC LOOPS

Dependability ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 10-15
Author(s):  
Y. P. Sorokoletov
Keyword(s):  
Fault Tolerance ◽  
Power Supply ◽  
Power Supply System ◽  
System Analysis ◽  
Fault Tree ◽  
Tolerance Analysis ◽  
Supply System ◽  
Tree Structure ◽  
Advantages And Disadvantages ◽  
Special Cases

Aim. In the course of fault tolerance analysis of complex technical systems using the method of fault tree-based methods, logic loops may occur when, from the point of view of fault tree structure, the system sustains itself. The recursion in the fault tree structure disrupts the logical equation and does not allow performing the calculation and associated analysis. A complex system is understood as one performing a multitude of functions, fault tolerant through a number of redundancy techniques, having intersystem communications and high level of integration of hardware and software components. This paper looks into a particular case of solving the problem of logical recurrence of a fault tree that occurred during an aircraft’s power supply system analysis for compliance with airworthiness requirements and aviation regulations.Method. The paper reviews known ways of solving the set task (both manual and automatic), describes the advantages and disadvantages, applicability and ultimately provides a comparative evaluation based on the results of calculation of occurrence probability of certain aircraft power supply system failures. The method of solving the problem of fault tree recurrence presented in this paper is based on identifying recursive elements in the tree’s structure with subsequent reduction of the cyclic connections to a converging spiral by modelling the initial state of the analyzed system.Results. The calculation of the fault tree under consideration is performed both by means of the method presented in this paper, and the most applicable in the particular case known methods of resolving recurrence. Additionally, comparative results of calculation of other special situations are shown. They are not considered in this paper but demonstrate the distinctive features of different methods. The calculations show that the methods yield the most diverging results in cases when the system is redundant and has feedbacks.Conclusions. The method presented in the paper has been tested as part of an aircraft’s power supply system fault tolerance analysis. The developed method in some cases enables manual resolution of the logic loop problem in the fault tree without a significant increase of computational resources while preserving the analytical solution (minimum fault tree cross sections). On the other hand, this solution may cause a fast growth of the fault tree size in cross-system analysis. In special cases, antithetical events like «operability» and «failure» may become mixed-up in the fault tree structure, which will entail the requirement to use complementary operator inversion and subsequently a manifold increase of the computation time. Another limitation of the method may stem from situations when it is impossible to identify the «initial» and «normal» states of the system under analysis. Given the above, the author classifies the presented method as an engineering method of limited applicability. 

Analysis and Solution about Overvoltage of Automatically Passing Neutral Section System

2012 ◽  
Vol 562-564 ◽  
pp. 1248-1251 ◽  
Author(s):  
Ran Wang ◽  
Trillion Q. Zheng ◽  
Hao Yu Ma
Keyword(s):  
Control System ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Electric Locomotive ◽  
Safe Operation ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Traction Power ◽  
Neutral Section

Over-voltages happen when electric locomotive passes the neutral section, which has serious influence on safe operation of the traction power supply system. This paper builds the model of contact net and neutral section of traction power line and analyzes transient process of the electric locomotive passing the neutral section. This paper proposes automatic control system for electric locomotive passing neutral section. It is effective to avoid the over-voltages.

scholarly journals Modeling of reliability of power supply systems with autonomous energy source

2019 ◽  
Vol 139 ◽  
pp. 01036
Author(s):  
M.S. Ershov ◽  
R.B. Jalilov ◽  
S.P. Shayimova ◽  
A.I. Choriyev ◽  
M.R. Charieva
Keyword(s):  
Energy Source ◽  
Comparative Analysis ◽  
Power Supply ◽  
Power Supply System ◽  
Random Processes ◽  
Supply System ◽  
Software Implementation ◽  
Energy Sources ◽  
Markov Random ◽  
Supply Systems

The methodology for calculating the reliability of power supply systems with autonomous and mixed energy sources has been considered. Autonomous sources are widely used in industrial power supply systems as primary, backup or emergency sources. The functioning and interchangeability of these systems has features that affect the reliability of power supply. The proposed methodology is based on the method of semi-Markov random processes and can be used for comparative analysis of the reliability of options for power supply systems. The methodology has been brought to software implementation and is accompanied by an example of calculating the reliability of the power supply system for stationary marine oil production platforms.

Nigeria Electricity Power Supply System: The Past, Present and the Future

2019 ◽  
Author(s):  
Oladimeji Joseph Ayamolowo ◽  
Elutunji Buraimoh ◽  
Ayodeji Olalekan Salau ◽  
Joseph O. Dada
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
The Past ◽  
The Future ◽  
Electricity Power

The Application of Hybridized DC-DC Converters in the Power Supply System of Spacecraft

2013 ◽  
Vol 273 ◽  
pp. 271-275
Author(s):  
Nan Qing ◽  
Wei Guo Wang
Keyword(s):  
Future Development ◽  
Power Supply ◽  
Radiation Effects ◽  
Power Supply System ◽  
Supply System ◽  
Space Environment ◽  
Packaging Technology ◽  
The Future

DC-DC converters are widely used in the power supply system of spacecraft. This paper introduces the application of hybridized dc-dc converter and its advantages, and the radiation effects in space environment. The hybrid packaging technology is briefly presented. Finally, the future development is proposed.

scholarly journals Reliability analysis of the power supply system of closed-circuit television system used at a highway toll collection point

2017 ◽  
Vol 41 (1) ◽  
pp. 39-58 ◽  
Author(s):  
Adam Rosiński
Keyword(s):  
Reliability Analysis ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Closed Circuit ◽  
Television System ◽  
Closed Circuit Television ◽  
Toll Collection ◽  
Supply Systems ◽  
Collection Point

Abstract The article presents issues concerning the power supply systems of closed-circuit television systems used at a highway toll collection point. The general diagram of the power supply system was presented, and then the reliability analysis was conducted. This enabled to develop a relationships graph, on the basis of which the Chapman–Kolmogorov system of equations describing it was created. On this basis, it was possible to set the relationships allowing to calculate the probability values of the system’s staying (in symbolic terms) in the following functional states: of full ability SPZ, of non-full ability SZB1 and SZB2, and of unfitness SB.

scholarly journals Design and Health Evaluation of Monitoring Test Platform for Metro Traction Power Supply System

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hengchao Zheng ◽  
Yuhua Wang
Keyword(s):  
Health Status ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Normal Operation ◽  
Safe Operation ◽  
Traction Power Supply System ◽  
Test Platform ◽  
Traction Power Supply ◽  
Traction Power

Subway traction power supply system is the energy source of subway operation. The normal operation of subway traction power supply system is directly related to the stable operation and safety of subway. If the subway traction power supply system breaks down, it not only will cause economic losses, but also may cause social disorder. Therefore, it is of great significance to study the traction power supply system of subway to ensure the safe operation of subway. The establishment of a reasonable monitoring and testing platform, the simulation analysis of the traction power supply system, and the regular health assessment can provide a strong guarantee for the safe operation of the subway. This paper aims to design a practical test platform through MATLAB modeling, so as to establish a simulation model of subway traction power supply system, and comprehensively monitor and grasp the health status of subway traction power supply system. This paper quantitatively evaluates the health status of subway traction power supply system, applies the principle of multilayer immunity, establishes the traction power supply system of analytic hierarchy process (AHP), and constructs the immune monitoring system of each layer. This method can provide the health status information of subway traction power supply system, subsystems, and components comprehensively, accurately, and intuitively and determine the subsystems and components that need to be maintained.

Research of Micro-Grid Power System Grounding and RCD for Energy Saving

2013 ◽  
Vol 648 ◽  
pp. 214-217
Author(s):  
Wen Xing Wang ◽  
Jin Hua Zhang
Keyword(s):  
Power System ◽  
Energy Saving ◽  
Power Supply ◽  
Power Distribution ◽  
Power Supply System ◽  
Supply System ◽  
Power Distribution Network ◽  
Advantages And Disadvantages ◽  
Micro Grid ◽  
New Challenges

After a large number of micro-grid power has been accessed to energy saving, the system would bring new challenges to the power distribution network in planning, design and construction. RCD directly related to the safety of persons and equipment. This article describes the commonly type of grounding protection, and analyze their respective advantages and disadvantages of the structure and characteristics of the micro-grid power supply system, the structure and characteristics of the ground type in the micro-grid power supply system were studied, the choice of RCD were focused on.

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