scholarly journals A Study of Ikaz and Normalized Hilbert transform for solving faulty in pipeline distribution system using transmission line modelling

2019 ◽  
Vol 469 ◽  
pp. 012083 ◽  
Author(s):  
Hanafi.M. Yusop ◽  
M.F. Ghazali ◽  
W.H. Azmi ◽  
M.F.M. Yusof ◽  
M.A. PiRemli ◽  
...  
Keyword(s):  
Transmission Line ◽  
Hilbert Transform ◽  
Distribution System

scholarly journals Ann based Shortcoming Area in HVDC Transmission Line

2019 ◽  
Vol 9 (1) ◽  
pp. 2053-2059
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Distribution System ◽  
Back Propagation ◽  
Neural System ◽  
Neural Systems ◽  
Back Propagation Algorithm ◽  
Hvdc Transmission ◽  
Nonlinear Input ◽  
Output Behavior

This paper is to ponder the use of Neural systems for shortcoming discovery and area in HVDC framework. The proposed Neural system learns examples and relationship on transient information. The Back-propagation algorithm has the ability to match map complex and nonlinear input - output behavior. A MATLAB model was created for the 500kv,1000MW,12 pulse-based converter-based distribution system and variousfault events were simulated. The limitations of AC over long transmission lines has led to the use of DC for bulk transmission over long distances. Fault condition like rectifier fault, inverter faults and transmission line faults are discussed in this paper.

Uniformly Bootstrapped Cable for the Key Distribution System Using Resistors and Noise Sources

2020 ◽  
Vol 19 (04) ◽  
pp. 2050046
Author(s):  
Pao-Lo Liu
Keyword(s):  
Transmission Line ◽  
Distribution System ◽  
Characteristic Impedance ◽  
Key Distribution ◽  
Mutual Inductance ◽  
Noise Sources ◽  
Lumped Element

Waveguide analysis indicates that a triaxial cable with uniform bootstrapping is a transmission line with an adjustable characteristic impedance. When the bootstrapping level is high, the characteristic impedance is high. The cable capacitance is reduced while the cable inductance is increased. Simulations confirm that the transmission-line circuit and the lumped-element circuit, including the mutual inductance, generate the same results for the key distribution system using resistors and noise sources.

CFD Based Modeling of Wave Propagation in Liquid Transmission Line Junctions

2013 ◽  
Author(s):  
Clemens Fries ◽  
Bernhard Manhartsgruber
Keyword(s):  
Wave Propagation ◽  
Transmission Line ◽  
Transmission Lines ◽  
Distribution System ◽  
Internal Combustion Engines ◽  
Dynamic Models ◽  
Fuel Injection ◽  
Simulation Models ◽  
Local Effects ◽  
Type Node

Wave propagation effects are of increasing importance in simulation models for fluid power applications due to rising demands for both the accuracy of predicted system responses as well as the range of interesting operating frequencies. Well documented examples can be found in technologies such as fuel injection for internal combustion engines or hydraulically driven punching machines. The distribution system for the pressurized fluid is predominantly made up of pipes and hoses as well as cylindrical bores in the housings of various components. These cylindrical geometries lend themselves conveniently for modeling as a network of elements with a one or two-dimensional spatial representation. The junctions between these elements, for instance a sharp elbow bend or a T-junction between three pipelines is very often idealized as a lossless Kirchhoff-type node. The present paper shows a comparison of transmission line modeling based on the well known frequency-dependent friction theory for transient laminar flow of a weakly compressible viscous fluid in transmission lines with a CFD model resolving the local effects occurring at a junction or intersection of cylindrical elements. Results are given for a 90 degree elbow under step excitation with the material parameters of a typical ISO 46 mineral oil based hydraulic fluid. These results can be used in order to assess the importance of including the usually neglected local effects at the junctions. In further work they will form the basis for reduced order dynamic models of transmission line junctions.

Optimal Placement of Unified Power Flow Controller in the Transmission Line Using SFL Algorithm

2014 ◽  
Vol 573 ◽  
pp. 352-355
Author(s):  
Bojaraj Soumya Latha ◽  
A. Amudha
Keyword(s):  
Power Systems ◽  
Transmission Line ◽  
Distribution System ◽  
Power Flow ◽  
Distribution Systems ◽  
System Structure ◽  
Optimal Placement ◽  
Unified Power Flow Controller ◽  
Flow Controller ◽  
Power Flow Controller

A power system structure has the generation, transmission and the distribution systems. During the transfer of power from the generation system to the distribution system, transmission line losses are occurred. To reduce the losses and keep the system stable, many controllers are being used. The Flexible AC Transmission systems (FACTS) are the modern controllers finding application in the power systems. The Unified Power Flow Controller (UPFC) is considered to be the best among the FACTS devices. It is installed in the transmission line to maintain the voltage of the system within the prescribe limits. The location to fix the UPFC is found using Shuffled Leap Frog Algorithm (SLFA). The transformer ratio is varied from its nominal value. Testing is done using an IEEE 30 bus system and the results are discussed.

scholarly journals A New Control Strategy for Active Power Filter

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4099
Author(s):  
Hong Shen ◽  
Fan Yang ◽  
Ahmed Abu-Siada ◽  
Zhao Liu
Keyword(s):  
Transmission Line ◽  
Control Strategy ◽  
Distribution System ◽  
Control Strategies ◽  
Harmonic Distortion ◽  
Active Power Filter ◽  
Electrical Equipment ◽  
Active Power ◽  
Normal Operation ◽  
Power Filter

The significant increase in electronic devices has resulted in serious harmonic pollutions in electricity grids. In addition, due to the resonance of the system capacitance and inductance, the harmonic current may be amplified dramatically when it goes through the transmission line which is harmful to the normal operation of electrical equipment. To suppress the voltage and current harmonics resonance, many control strategies of active power filter (APF) are proposed. Nevertheless, these strategies cannot attenuate the amplified harmonic voltage and current due to resonance. In this paper, the harmonic propagation characteristics are investigated on a long transmission line and a new control strategy called VI-APF based on current-controlled and voltage-controlled current sources connected in parallel is presented. According to the simulation results, the proposed control strategy can suppress the total harmonic distortion to a low level. Finally, the effectiveness of VI-APF is demonstrated through the simulation on the IEEE 33-bus distribution system.

Re-Examination of the Cable Capacitance in the Key Distribution System Using Resistors and Noise Sources

2017 ◽  
Vol 16 (03) ◽  
pp. 1750025 ◽  
Author(s):  
Pao-Lo Liu
Keyword(s):  
Transmission Line ◽  
Transit Time ◽  
Distribution System ◽  
Key Distribution ◽  
Noise Sources ◽  
Element Analysis ◽  
Lumped Element ◽  
Band Limited ◽  
Line Analysis

The effect of cable capacitance in the classical key distribution system based on resistors and band-limited noise sources is re-examined. Both the lumped element analysis and the transmission line analysis are performed. As long as the cable capacitance and inductance are fully taken into account, the lumped element analysis and the transmission line analysis generate identical results. When the cable is bootstrapped with a driven shield, the capacitance can be neglected, but the transit time should not be overlooked.

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