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Determinants and current flows in electric networks

R.L. Brooks, C.A.B. Smith, A.H. Stone, W.T. Tutte
1992 Discrete Mathematics  
Stone and W.T. Tutte, Determinants and current flows in electric networks, Discrete Mathematics 100 (1992) 291-301.  ...  We consider electrical networks in which current enters at a single node and leaves at another.  ...  Determinants and electric networks 299 In the alternative approach the matrix H is constructed as before by drawing horizontal lines L, between the nodes, as in Fig. 6 .  ... 
doi:10.1016/0012-365x(92)90648-y fatcat:n7rw72ahszg57duzvretycsarq

Conducting power flow analysis and simulations for a delivery electric system with important consumers

Mariana Dumitrescu, M. Lazar, F. Faur, M. Popescu-Stelea
2021 MATEC Web of Conferences  
The goals of the paper are to conduct the simulation and to analyze the power flow in a real complex industrial system.  ...  Professional Edsa digital simulation for the case study has the purpose to determine and to control/correct the operational state of the power system.  ...  In Figure 3 are presented the current flows and the voltage drops percent % for 6kV network and 0,4kV. Fig. 3. The branches current flow [A] and the buses voltage drops [%] for 6kV and 0,4kV.  ... 
doi:10.1051/matecconf/202134204012 fatcat:ffvrh542mbh4fek2xsv557n574

Traffic Flow Simulation Model Based on Kirchhoff's Law

Jianming CUI, Jing MA
2012 International Journal of Digital Content Technology and its Applications  
In this paper, through the analysis of the system, get similarity by comparison between transport network and electricity networks, proposed feasibility of the application electric network theory in the  ...  traffic network traffic flow.  ...  Current was able to flow in the wires, because in the currents with high electrical potential and low electrical potential differences.  ... 
doi:10.4156/jdcta.vol6.issue6.4 fatcat:p7podnak4rgjvheugk7aqceuzm

Impact of allocation factors on electric power system control

A. Z. Gamm, I. I. Golub
2005 2005 IEEE Russia Power Tech  
The paper presents a brief description of the graph algorithms to calculate allocation factors of power flows, loads and losses.  ...  of generators, that affect negatively the sensitivity of the steady state equations system solutions' to a change in the external factors.  ...  The algorithm of determining the allocation of active and reactive current components in the branches coincides completely with determining the allocation of flows in the network without losses.  ... 
doi:10.1109/ptc.2005.4524735 fatcat:bilqdslnwbeoxgletfqlqyfaey

Galvanic effects of the gravitational network and measures to protect against it

Boltaev Otabek, Bayanov Ildar, Axmedova Firuza
2021 Zenodo  
The article examines the galvanic effects of the traction network on off-line adjacent lines and identifies insignificant electric shocks on adjacent lines due to the metal structures supporting the supports  ...  in the traction system, and significant measures on protection against galvanic effects. suggested.  ...  Outside the traction substation section, the current flowing through the rails of the electric locomotive always flows in one direction and changes its direction in the opposite direction, as opposed to  ... 
doi:10.5281/zenodo.4700363 fatcat:ptzordkuy5bx5pdmmmxf675vda

On power quality and reliability of supply

Lidiia Kovernikova, Roman Shamonov, N. Voropai, S. Senderov, A. Michalevich, H. Guliev
2017 E3S Web of Conferences  
Measured current and voltage were used to calculate harmonic active power.  ...  For the other part harmonic active power flows from the supply network to the aluminum smelter block.  ...  networks at harmonics [23] , the values of phase angles of harmonic currents of nonlinear loads distributed in the network [24] , the changes in network load and scheme, and the others, i.e. they are  ... 
doi:10.1051/e3sconf/20172504001 fatcat:gjqtgg577nbtvjuvx6l4x3qhya

Integrating power flow modelling with building simulation

J.A. Clarke, N.J. Kelly
2001 Energy and Buildings  
Specifically, the paper describes: a) an electrical network solver for d.c., a.c. and hybrid circuits; b) the thermal/electrical models of power producing and consuming equipment; c) the nature of the  ...  interactions between the thermal, lighting, air flow and electrical power flow domains; d) aspects relating to the conflation of the power flow model with the other technical domains as found within the  ...  MODELLING ELECTRICAL SYSTEMS The purpose of the electrical power system model is to determine the distributed power flows and state variables (voltage and current).  ... 
doi:10.1016/s0378-7788(00)00115-8 fatcat:wby4bcssb5hk7idgjotqzdrvvq

Device for conversion of equalizing current at the site of the traction ac network

Abdurauf Safarov, Khurshid Sattarov, Sarvar Jumaboyev, N. Voropai, S. Senderov, A. Michalevich, H. Guliev
2019 E3S Web of Conferences  
control systems, control and measurement of currents.  ...  The article proposes the design of a device for converting the equalizing current using a compensating winding, which meets the requirements for accuracy and reliability on the part of various automated  ...  Losses of electric energy in the traction network, caused by equalizing currents depend on power supply and partitioning merpttazinol areas and are determined by the nature of the traction load, parameters  ... 
doi:10.1051/e3sconf/201913901034 fatcat:3cxwrog7rjbordftcetfe6k4v4

Designing Passive Harmonic Filter of Electric Propulsion System on Tanker Ship

Indra Ranu Kusuma, Semin Semin, Muhammad Badrus Zaman, Faisal Muhammad Satrio
2018 International Journal of Marine Engineering Innovation and Research  
In a ship, electrical network system are interconnected to each other to another electrical consumer device. The effect will impact all the device that connected to the electrical network system.  ...  Abstract Harmonic is a frequency defect that have some negative effect to the electrical network system.  ...  Semin for his supporting in this paper. I also thanks to my undergraduate student , Faisal M Satrio, for providing the data of this resesrch .  ... 
doi:10.12962/j25481479.v2i3.3781 fatcat:p6w3rkfasvbw3fohudhg6oaw3q

A Method for Determining Customers' Energy Shrinkage Cost

2020 Jurnal Elkomika  
ABSTRACTEnergy shrinkage is one component of electrical costs that must be paid by customers on the system voltage in different networks, high, medium, and low voltage networks.  ...  This paper proposes a method for determining the cost allocation of energy shrinkage to customers in an equivalent circuit model, with the loads collected for each network.  ...  Electric currents that flow in the transmission network will cause losses due to the resistance of the line conductor as in (James, 2014) .  ... 
doi:10.26760/elkomika.v8i3.672 fatcat:k4p67j2rxncapdi66c355veuf4

Centrality Measures Based on Current Flow [chapter]

Ulrik Brandes, Daniel Fleischer
2005 Lecture Notes in Computer Science  
Since running times and space requirements are prohibitive for large networks, we also present a randomized approximation scheme for current-flow betweenness.  ...  Rather than along shortest paths only, it is assumed that information spreads efficiently like an electrical current.  ...  We are interested in how current flows through an electrical network. A vector b : V → IR called supply defines where current externally enters and leaves the network .  ... 
doi:10.1007/978-3-540-31856-9_44 fatcat:366rtjrehvcjlitql5avvvrney

Inductive influence of 25 kV, 50 Hz electrified single rail traction system

Bosko Milesevic, Ivo Uglesic, A. Szeląg, K. Karwowski, H. Gold, A. Żurkowski
2018 MATEC Web of Conferences  
The procedures of short-circuit current calculation and supply current measurement in the railway system are described. The basic theoretic background of inductive interference is explained.  ...  On a case study, the results of the induced voltage calculation and measurement is compared. It is proved that induced voltage directly depends of supply current or shortcircuit value.  ...  Locomotives are supplied with electrical energy over the pantograph and the current flows through the rails and ground back in the traction substation [9] .  ... 
doi:10.1051/matecconf/201818006004 fatcat:aodh4bu3hnbizcpbk3oyxwwijq

An algorithm to calculate feasible operating conditions of electrical network, given overhead conductor temperature and sag constraints

Yekaterina Popova, Oleg Voitov, Lyudmila Semenova, N. Voropai, S. Senderov, A. Michalevich, H. Guliev
2018 E3S Web of Conferences  
This consideration is based on forming and solving an equation of conductor heat balance to calculate the conductor temperature depending on the current flowing through the conductor and environmental  ...  The paper presents the results of numerical calculations performed for individual overhead lines and for a test 16-node scheme of electrical network.  ...  An algorithm to calculate feasible power flow in electrical network The algorithm contains the following stages. A.  ... 
doi:10.1051/e3sconf/20185802015 fatcat:wfsvlgrxcvbvflzxlbt3p77lai

Analysis of electricity loss calculation methods in distribution networks

Abat Muratov, Zlixa Saparniyazova, I I Bakhadirov, Alibiy Bijanov, F.-J. Lin, N. Voropai, C.-I. Chen, K. Suslov, D. Sidorov, A.M. Foley, Y. Sun, P. Lombardi (+1 others)
2021 E3S Web of Conferences  
The conditions for the application of methods for calculating electricity losses are determined, and structural separated losses in electrical networks are shown.  ...  A modern classification of losses is presented, and methods for calculating technological losses of electricity are considered.  ...  Operational calculations (for current time intervals) determine losses for current time intervals and are used to: -control over the current values of electricity losses, -operative adjustment of the current  ... 
doi:10.1051/e3sconf/202128907017 fatcat:5dzvtgt6wngzxm323qbk4ueckm

Identification of the dominant harmonic source in the LV network on the base of anomalous power flows considerations

H. Schau, A. Novitskiy
2005 2005 IEEE Russia Power Tech  
analysis of the harmonic voltage and current phasors.  ...  The localization of the dominant harmonic distortion source in the electrical network is one of the practical tasks in the consideration of the power quality in electric power systems.  ...  But the harmonic power flow estimation in real electrical networks requires to determine not only the magnitudes of harmonic voltage and current phasors as accurately as possible but also the corresponding  ... 
doi:10.1109/ptc.2005.4524730 fatcat:urgzl3debbbxnfsbel45tyjsvy
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