scholarly journals FE Simulation of Transmission Tower

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Boshra Eltaly ◽  
Amen Saka ◽  
Kamel Kandil
Keyword(s):  
Transmission Line ◽  
Good Accuracy ◽  
Failure Load ◽  
Fe Simulation ◽  
Numerical Models ◽  
Joint Effect ◽  
Transmission Tower ◽  
Electrical Transmission ◽  
Transmission Towers ◽  
Phase Conductors

The vital components of the transmission line are the electrical transmission towers. They are commonly used to support the phase conductors and shield wires of a transmission line. Also the accurate prediction of tower failure is very important for the reliability and safety of the transmission system. The current research describes nonlinear FE models of predicting the transmission tower failure. In the current FE simulations, the eccentricity and the joint effect of the tower were considered. The current models have been calibrated with results from previous full-scale tower tests and numerical models with good accuracy in terms of both the failure load and the failure mode.

The use of wide-flange shapes in transmission towers

1982 ◽  
Vol 9 (1) ◽  
pp. 129-133
Author(s):  
Murty K. S. Madugula ◽  
Gupta S. R. Davalath ◽  
V. L. Rea
Keyword(s):  
High Voltage ◽  
Transmission Tower ◽  
Electrical Transmission ◽  
Transmission Towers ◽  
Dead End ◽  
Heavy Loads ◽  
Extra High Voltage ◽  
Ultra High Voltage

The members of self-supporting latticed electrical transmission towers customarily consist of rolled angle sections. Nowadays, with transmission voltages in the extra-high-voltage and ultra-high-voltage ranges, the leg members are required to carry very heavy loads, especially in the case of heavy angle and anchor towers. Results of a study carried out on wide-flange shapes, to investigate their suitability as alternative sections to welded and built-up angles, are presented. The world's first transmission tower that has wide-flange shapes for legs and arms, Ontario Hydro's 500-kV double circuit heavy angle dead end tower type V6H, is described.

scholarly journals Effects of Ground Resistivity and Tower Structural Design on Transmission Line Symmetrical Components

2020 ◽  
Vol 9 (1) ◽  
pp. 2115-2126
Keyword(s):  
Transmission Line ◽  
Electric Power ◽  
Transmission Lines ◽  
Structural Design ◽  
Power Transmission ◽  
Design Parameters ◽  
Transmission Tower ◽  
Electric Power Supply ◽  
Symmetrical Components ◽  
Transmission Towers

Electric power transmission towers are line support that exists in different structural configurations depending on the design. Parameters in consideration for the design include proposed voltage and current ratings to be carried by the tower, weight of aluminum conductor and the weight of concrete foundation on which the tower would be erected. It is often reported that ground resistivity of the ground on which an electric power transmission tower is erected has significant effects on earth faults and transmission losses on the line. This paper presents an investigation of the effects of ground resistivity and tower structural design on transmission line symmetrical components. Symmetrical component parameters’ evaluation of the transmission lines approach is considered the best option. Ten differently structured transmission towers were selected for the case study. The effects of installing these ten towers on each of the available ground resistivity types were examined. A modern computer software was developed in carrying out this investigation. The results are presented and discussed. It was observed that at each location of a tower, ground resistivity plays a vital role in measuring the performance of tower in an electric power supply stability and reliability

scholarly journals Static and Dynamic Analysis of Transmission Line Tower

2019 ◽  
Vol 9 (1S) ◽  
pp. 228-233
Keyword(s):  
Dynamic Analysis ◽  
Transmission Line ◽  
Contextual Analysis ◽  
Electrical Transmission ◽  
Characteristic Frequencies ◽  
Static And Dynamic Analysis ◽  
Transmission Towers ◽  
Electrical Transmission Line ◽  
Dynamic Examination ◽  
Universal Standard

The towers of the to the most powerful life-line buildings that support electrical transmission line are peculiar transmission. Transmission towers are essential for providing energy to various parts of the nation. The transmission line should be stable and carefully structured with the objective that they do not fizzle in the midst of a cataclysmic event and adapt to the national and universal standard. This present paper manages the investigation of static and dynamic examination of transmission line tower . A run of the mill sort of transmission line tower is picked as contextual analysis . The examination and displaying of pinnacle is done utilizing FE based ANSYS programming. The heaps following up on the pinnacle reflected are numb burden, live burden and dynamic burdens .in this Paper the most extreme twisting joined anxieties and characteristic frequencies ,bowing minute shear constrain are gotten.

scholarly journals Effect of Earthing Enhancing Compound (EEC) on Improving Tower Footing Resistance of a 500 kV Tower in a Rocky Area

2021 ◽  
Vol 11 (12) ◽  
pp. 5623
Author(s):  
Nur Alia Farina Mohd Nasir ◽  
Mohd Zainal Abidin Ab Kadir ◽  
Miszaina Osman ◽  
Muhamad Safwan Abd Rahman ◽  
Ungku Anisa Ungku Amirulddin ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Comparative Analysis ◽  
Transmission Line ◽  
Structure Analysis ◽  
Current Distribution ◽  
Soil Profile ◽  
Soil Structure ◽  
Soil Resistivity ◽  
Transmission Towers ◽  
Rocky Soil

This paper presents a comparative analysis of different earthing designs’ performances, with particular interest on the use of earthing enhancing compound (EEC) for a selected earthing design of 500 kV transmission towers in a rocky soil, using the SESCAD tool of the Current distribution, electromagnetic field grounding and soil structure analysis (CDEGS) software. The simulation included the interpretation of soil profile and comparison between designs A, B and C, which are currently used for the 500 kV tower footing resistance (TFR) improvement. Results showed each design had reduced the TFR by 66%, 54.7% and 63.2% for the towers T42, T48 and T50, respectively. In some cases, further improvement of TFR is required, especially in the rocky area where the soil resistivity (SR) value is of more than 500 Ω⋅m. In this case, EEC was used in Design C, encasing both the vertical and horizontal electrodes, and it reduced the TFR further by 16% to 20%. The characteristics of the soil and earthing arrangement design play an important role in achieving a low TFR value, which is directly proportional to the backflashover occurrence and thus to the transmission line performance.

Ultrasonic unilateral double-position excitation lamb wave defect detection and quantification method for ground electrode of transmission tower

2021 ◽  
pp. 1-15
Author(s):  
Kuan Ye ◽  
Kai Zhou ◽  
Ren Zhigang ◽  
Ruizhe Zhang ◽  
Chunsheng Li ◽  
...  
Keyword(s):  
Guided Waves ◽  
Power Transmission ◽  
Geometric Model ◽  
Guided Wave ◽  
Quantization Error ◽  
Dispersion Function ◽  
Stable Operation ◽  
Transmission Tower ◽  
Ultrasonic Guided Wave ◽  
Transmission Towers

The power transmission tower’s ground electrode defect will affect its normal current dispersion function and threaten the power system’s safe and stable operation and even personal safety. Aiming at the problem that the buried grounding grid is difficult to be detected, this paper proposes a method for identifying the ground electrode defects of transmission towers based on single-side multi-point excited ultrasonic guided waves. The geometric model, ultrasonic excitation model, and physical model are established, and the feasibility of ultrasonic guided wave detection is verified through the simulation and experiment. In actual inspection, it is equally important to determine the specific location of the defect. Therefore, a multi-point excitation method is proposed to determine the defect’s actual position by combining the ultrasonic guided wave signals at different excitation positions. Besides, the precise quantification of flat steel grounding electrode defects is achieved through the feature extraction-neural network method. Field test results show that, compared with the commercial double-sided excitation transducer, the single-sided excitation transducer proposed in this paper has a lower defect quantization error in defect quantification. The average quantization error is reduced by approximately 76%.

scholarly journals A Vibration-Based Structural Health Monitoring System for Transmission Line Towers

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 515 ◽  
Author(s):  
Long Zhao ◽  
Xinbo Huang ◽  
Ye Zhang ◽  
Yi Tian ◽  
Yu Zhao
Keyword(s):  
Structural Health Monitoring ◽  
Transmission Line ◽  
Natural Frequency ◽  
Health Monitoring ◽  
Structural Changes ◽  
Natural Frequencies ◽  
Transmission Tower ◽  
Health Monitoring System ◽  
Wind Speeds ◽  
Before And After

In this paper, we present a vibration-based transmission tower structural health monitoring system consisting of two parts that identifies structural changes in towers. An accelerometer group realizes vibration response acquisition at different positions and reduces the risk of data loss by data compression technology. A solar cell provides the power supply. An analyser receives the data from the acceleration sensor group and calculates the transmission tower natural frequencies, and the change in the structure is determined based on natural frequencies. Then, the data are sent to the monitoring center. Furthermore, analysis of the vibration signal and the calculation method of natural frequencies are proposed. The response and natural frequencies of vibration at different wind speeds are analysed by time-domain signal, power spectral density (PSD), root mean square (RMS) and short-time Fouier transform (STFT). The natural frequency identification of the overall structure by the stochastic subspace identification (SSI) method reveals that the number of natural frequencies that can be calculated at different wind speeds is different, but the 2nd, 3rd and 4th natural frequencies can be excited. Finally, the system was tested on a 110 kV experimental transmission line. After 18 h of experimentation, the natural frequency of the overall structure of the transmission tower was determined before and after the tower leg was lifted. The results show that before and after the tower leg is lifted, the natural frequencies of each order exhibit obvious changes, and the differences in the average values can be used as the basis for judging the structural changes of the tower.

scholarly journals High speed electrical transmission line design and characterization

2017 ◽  
Vol 12 (02) ◽  
pp. C02002-C02002
Author(s):  
R. Bates ◽  
C. Buttar ◽  
J. Buytaert ◽  
L. Eklund ◽  
L.F.S. de Acedo ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Speed ◽  
Electrical Transmission ◽  
Electrical Transmission Line ◽  
Line Design

GAP solitons in bi-inductance electrical transmission line

1995 ◽  
Vol 52 (6) ◽  
pp. 609-613 ◽  
Author(s):  
B Z Essimbi ◽  
A A Zibi ◽  
T C Kofane
Keyword(s):  
Transmission Line ◽  
Electrical Transmission ◽  
Electrical Transmission Line ◽  
Gap Solitons

scholarly journals Improved Performance of Electrical Transmission Tower Structure Using Connected Foundation in Soft Ground

Energies ◽  
2015 ◽  
Vol 8 (6) ◽  
pp. 4963-4982 ◽  
Author(s):  
Doohyun Kyung ◽  
Youngho Choi ◽  
Sangseom Jeong ◽  
Junhwan Lee
Keyword(s):  
Soft Ground ◽  
Transmission Tower ◽  
Electrical Transmission ◽  
Tower Structure ◽  
Improved Performance
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