Simulation of Temperature Distribution Behavior of High Voltage Cable Joints with Typical Defects

2021 ◽  
Author(s):  
Ashfaque Ahmed Bhatti ◽  
Bin Yang ◽  
Xiaosheng Peng ◽  
Zhanran Xia ◽  
Lei Dong ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
High Voltage ◽  
Distribution Behavior

Analysis of Temperature Distribution Behavior of Motorcycle Brake Pads

2019 ◽  
pp. 13-24
Author(s):  
Khairul Shahril bin Shaffee ◽  
Mohd Khairuddin Hj. Ali Musa ◽  
Mohamad Sabri Mohamad Sidik ◽  
Mior Firdaus Mior Abd. Majid ◽  
Muhamad Husaini Abu Bakar
Keyword(s):  
Temperature Distribution ◽  
Brake Pads ◽  
Distribution Behavior

scholarly journals Electric Field and Temperature Simulations of High-Voltage Direct Current Cables Considering the Soil Environment

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4910
Author(s):  
Christoph Jörgens ◽  
Markus Clemens
Keyword(s):  
Temperature Distribution ◽  
Electric Field ◽  
High Voltage ◽  
Direct Current ◽  
Insulation Material ◽  
Soil Environment ◽  
High Voltage Direct Current ◽  
Weakly Coupled ◽  
Surrounding Soil ◽  
Symmetric Temperature

For long distance electric power transport, high-voltage direct current (HVDC) cable systems are a commonly used solution. Space charges accumulate in the HVDC cable insulations due to the applied voltage and the nonlinear electric conductivity of the insulation material. The resulting electric field depends on the material parameters of the surrounding soil environment that may differ locally and have an influence on the temperature distribution in the cable and the environment. To use the radial symmetry of the cable geometry, typical electric field simulations neglect the influence of the surrounding soil, due to different dimensions of the cable and the environment and the resulting high computational effort. Here, the environment and its effect on the resulting electric field is considered and the assumption of a possible radial symmetric temperature within the insulation is analyzed. To reduce the computation time, weakly coupled simulations are performed to compute the temperature and the electric field inside the cable insulation, neglecting insulation losses. The results of a weakly coupled simulation are compared against those of a full transient simulation, considering the insulation losses for two common cable insulations with different maximum operation temperatures. Due to the buried depth of HV cables, an approximately radial symmetric temperature distribution within the insulation is obtained for a single cable and cable pairs when, considering a metallic sheath. Furthermore, the simulations show a temperature increase of the earth–air interface above the buried cable that needs to be considered when computing the cable conductor temperature, using the IEC standards.

Coupled Field Thermoelectric Simulation of High Voltage Ceramic Cap and Pin Disc Type Insulator Assembly

2014 ◽  
Vol 4 (1) ◽  
pp. 69-86
Author(s):  
R. D. Palhade ◽  
V. B. Tungikar ◽  
G. M. Dhole ◽  
S. M. Kherde
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
High Voltage ◽  
Transmission Lines ◽  
Potential Field ◽  
Electrical Potential ◽  
Element Formulation ◽  
Electrical Load ◽  
Coupled Field ◽  
Electrical Potential Field

Transmission of high power at high voltages over very long distances has become very imperative. At present, throughout the globe, this task performed by overhead transmission lines. The dual task of mechanically supporting and electrically isolating the live phase conductors from the support tower is performed by insulators. The electrical potential, field and temperature distribution along the insulators governs the possible effects, which is quite detrimental to the system. However, a reliable data on electrical potential, field and temperature distribution in commonly employed insulators are rather scarce or access individually for thermal or electrical load only. Considering this, the present work has made an attempt to study accurately, thermal and electrical characteristics of 11 kV single cap and pin type ceramic disc distribution insulator assembly used for high voltage transmission. The coupled field thermo electrical finite element by using commercially available FEM software Ansys-11 is employed for the required field computations. This new set of ANSYS coupled-field elements enables users to accurately and efficiently analyze thermoelectric devices. This paper review the finite element formulation, which in addition to Joule heating, includes Seebeck, Peltier, Thomson effects and electrical load, i. e. by considering thermal and electric loads acting simultaneously. The Electrical voltage, electrical field and temperature distribution is deduced and compared with various other/individual analyses.

High Voltage Effects in Top Gate Amorphous Silicon Thin Film Transistors

2000 ◽  
Vol 621 ◽  
Author(s):  
N. Tosic ◽  
F. G. Kuper ◽  
T. Mouthaan
Keyword(s):  
Thin Film ◽  
Temperature Distribution ◽  
Amorphous Silicon ◽  
High Voltage ◽  
Thin Film Transistors ◽  
Channel Length ◽  
Thermal Heating ◽  
Silicon Thin Film ◽  
Self Heating ◽  
Channel Lengths

ABSTRACTIn this paper, an analysis of the high voltage induced degradation in top gate amorphous silicon Thin Film Transistors (TFT) will be shown, including the aspect of self-heating. It will be shown through experimental results that the degradation level under high voltages on drain and gate is different for TFT's with different channel lengths. In addition, the temperature distribution over the TFT area for devices with different channel length is simulated. Simulation shows that the peak of temperature distribution is located at the drain/channel edge and that level of thermal heating depends on the channel length.

scholarly journals A STUDY ON TEMPERATURE DISTRIBUTION OF THE HIGH VOLTAGE PORCELAIN INSULATOR STRING

2021 ◽  
Vol 47 (05) ◽  
Author(s):  
LE VAN DAI
Keyword(s):  
Temperature Distribution ◽  
High Voltage ◽  
Transmission Lines ◽  
Remote Detection ◽  
Voltage Distribution ◽  
Porcelain Insulator ◽  
Detection Technology ◽  
Infrared Technology ◽  
Stability Time ◽  
High Voltage Porcelain

Nowadays, porcelain string insulators are commonly used in high voltage transmission lines. The study of temperature distribution is extensively performed in the design and development of high voltage insulations. As known, the infrared technology has opened the door to a variety of applications and especially it is also used as a kind of non-contact remote detection technology which has the advantage for detecting high voltage faulty porcelain insulator. Thanks to it, this paper uses the infrared technology to investigate the temperature distribution of the 220kV power grid insulator string. The experiments were done in climate chamber to study. Firstly, determining the thermal stability time of the high voltage porcelain insulator called XP-70 type composing of 14 pieces under the tested voltage of 127kV based on the temperature and voltage distribution. And then the temperature distribution along the normal and fault insulator string experiments. The experimental results show that it may detect and compare the insulator metal cap temperature of faulty insulator in the porcelain insulator string and determine the location of them. And especially based on the unchangeable voltage distribution, it may detect the temperature distribution characteristic for the fault insulator string. Therefore, this research results can provide a reference to detect the faulty porcelain insulator strings

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