Asymmetrical Fault Classifier for a Parallel Transmission Line Using Chromatic Processing

2014 ◽  
Author(s):  
Z.S. Almajali ◽  
J.W. Spencer ◽  
G.R. Jones
Keyword(s):  
Transmission Line ◽  
Parallel Transmission ◽  
Chromatic Processing

Synchro Phasor Measurement Based Fault Analysis of a Parallel Transmission Line

2014 ◽  
Vol 984-985 ◽  
pp. 996-1004
Author(s):  
D. Miruthula ◽  
Ramachandran Rajeswari
Keyword(s):  
Transmission Line ◽  
Transmission System ◽  
Fault Analysis ◽  
Operating Conditions ◽  
Measurement Unit ◽  
Fault Identification ◽  
Parallel Transmission ◽  
Inference System ◽  
Fault Type ◽  
Phasor Measurement

This paper presents a new method to classify transmission line shunt faults and determine the fault location using phasor data of the transmission system. Most algorithms employed for analyzing fault data require that the fault type to be classified. The older fault-type classification algorithms are inefficient because they are not effective under certain operating conditions of the power system and may not be able to accurately select the faulted transmission line if the same fault recorder monitors multiple lines. An intelligent techniques described in this paper is used to precisely detect all ten types of shunt faults that may occur in an electric power transmission system (double-circuit transmission lines) with the help of data obtained from phasor measurement unit. This method is virtually independent of the mutual coupling effect caused by the adjacent parallel circuit and insensitive to the variation of source impedance. Thousands of fault simulations by MATLAB have proved the accuracy and effectiveness of the proposed algorithm. This paper includes the analysis of fault identification techniques using Artificial Neural Network and Adaptive Neuro-Fuzzy Inference System based protection schemes. The performances of the techniques are examined for different faults on the parallel transmission line and compared with the conventional relay scheme. The results obtained shows that ANFIS based fault identification gives better performance than other techniques.

scholarly journals Evaluation of Gas Pipeline Induced Voltage Associated with Parallel Transmission Line

2015 ◽  
Vol 793 ◽  
pp. 90-94 ◽  
Author(s):  
Soon Chai Chia ◽  
Mohd Zainal Abidin Ab Kadir ◽  
Mahdi Izadi
Keyword(s):  
Electromagnetic Field ◽  
Transmission Line ◽  
Field Effect ◽  
Gas Pipeline ◽  
Acceptable Level ◽  
Induced Voltage ◽  
Transmission Tower ◽  
Parallel Transmission ◽  
Negative Effect

The voltage will be induced in the pipeline due to an electromagnetic field effect generated by the parallel transmission tower. This will bring up the negative effect to the pipeline, transmission tower and people get contracts with the pipeline. A study has been carried out to determine the electromagnetic field (EMF) distribution of parallel transmission line and pipeline due to AC currents and lightning faults. Only a few of previous study focus on lightning faults. The lightning faults data for transmission line and pipeline still insufficient nowadays. A mitigation system has been developed to minimize the induced voltage on pipeline due to the electromagnetic field of energized transmission line. ANSYS Maxwell software is used for modeling. The range of induced voltage obtained is within the acceptable level of the IEEE 80-2000 standards.

Research on Frequency Electromagnetic Field of Parallel Transmission Line

2014 ◽  
Vol 986-987 ◽  
pp. 1992-1995
Author(s):  
Hong Ying Cao ◽  
Bo Tang ◽  
You Xian Peng ◽  
Yu Li ◽  
Bin Chen
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
The State ◽  
National Standards ◽  
Power Lines ◽  
Three Gorges ◽  
Parallel Transmission ◽  
Electric And Magnetic Field

At present the study mainly for frequency electromagnetic field which is based on a single transmission line meanwhile the value must be in line with the requirements of the workers in the country frequency electromagnetic field. However, for parallel transmission line the maximum of frequency electromagnetic field is still to meet the provisions of the state, therefore in this paper studied the parallel transmission lines. Taking the multiple parallel power lines of China Three Gorges University as an example, the values of electric and magnetic field are calculated and the electromagnetic field is measured based on National standards. Then, compare the measured value with theoretical value, verified the correctness of the superposition algorithm.

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