High Resolution Wind Flow Field Analysis around Power Transmission Lines Based on Computational Fluid Dynamics Method

2018 ◽  
Author(s):  
Xiaoyu Luo ◽  
Wenping Xie ◽  
Kai Xiao ◽  
Ming Nie
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Resolution ◽  
Transmission Lines ◽  
Power Transmission ◽  
Field Analysis ◽  
Wind Flow ◽  
Power Transmission Lines ◽  
Flow Field Analysis ◽  
Dynamics Method

Flow Field Analysis of Self-Energizing Oil Screen with Dynamic Filtration Rollers Based on Gear Train

2013 ◽  
Vol 716 ◽  
pp. 663-667
Author(s):  
Shao Jie Xin ◽  
Qing Ling Li
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Kinetic Energy ◽  
Pressure Field ◽  
Gear Train ◽  
Field Analysis ◽  
Field Distributions ◽  
Dynamic Filtration ◽  
Flow Field Analysis ◽  
Pump Inlet

A new structure of oil screen named self-energizing oil screen with dynamic filtration rollers based on gear train was put forward. It uses the pump inlet fluid kinetic energy which is produced by pump working stroke to drive the impeller to rotate. The driving moment is transmitted to the rollers by means of gear train. When the rollers rotate, sands are prevented and oil is filtered. Computational model of the screen was established by GAMBIT based on the computational fluid dynamics. The velocity filed and pressure field distributions were attained and the driving moment of the screen was computed by FLUENT solver. The results validate that the new designed self-energying oil screens structure is reasonable, it can filter the oil effectively when the pump works.

scholarly journals Wind Resource Assessment of the Southernmost Region of Thailand Using Atmospheric and Computational Fluid Dynamics Wind Flow Modeling

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1899
Author(s):  
Jompob Waewsak ◽  
Chana Chancham ◽  
Somphol Chiwamongkhonkarn ◽  
Yves Gagnon
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Resolution ◽  
Power Plants ◽  
Resource Assessment ◽  
Wind Data ◽  
Wind Flow ◽  
Flow Modeling ◽  
Wind Resource Assessment ◽  
Wind Resource

This paper presents the wind resource assessment of the southernmost region of Thailand using atmospheric and computational fluid dynamics (CFD) wind flow modeling. The predicted wind data by the Weather Research and Forecasting (WRF) atmospheric modeling, assimilated to a virtual met mast, along with high-resolution topographic and roughness digital data, are then used as the main input for the CFD microscale wind flow modeling and high resolution wind resource mapping at elevations of 80 m, 100 m, 120 m, and 140 m agl. Numerical results are validated using measured wind data. Results show that the potential area where the wind speeds at 120 m agl are above 8.0 m/s is 86 km2, corresponding to a technical power potential in the order of 300 MW. The installation of wind power plants in the areas with the best wind resource could generate 690 GWh/year of electricity, thus avoiding greenhouse gas emissions of 1.2 million tonnes CO2eq/year to the atmosphere. On the other hand, developing power plants with International Electrotechnical Commission (IEC) Class IV wind turbines in areas of lower wind resource, but with easier access, could generate nearly 3000 GWh/yr of energy, with a CO2eq emissions avoidance of 5 million tonnes CO2eq on a yearly basis.

METHOD OF SYNTHESIS OF CLOSED-LOOP SYSTEMS OF ACTIVE SHIELDING MAGNETIC FIELD OF POWER TRANSMISSION LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 8-10 ◽  
Author(s):  
B.I. Kuznetsov ◽  
◽  
A.N. Turenko ◽  
T.B. Nikitina ◽  
A.V. Voloshko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transmission Lines ◽  
Closed Loop ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Closed Loop Systems ◽  
Active Shielding

scholarly journals Time-Multiplexed Self-Powered Wireless Current Sensor for Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Hao Chen ◽  
Zhongnan Qian ◽  
Chengyin Liu ◽  
Jiande Wu ◽  
Wuhua Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Current Measurement ◽  
Current Sensor ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Current Sensing ◽  
Self Powered

Current measurement is a key part of the monitoring system for power transmission lines. Compared with the conventional current sensor, the distributed, self-powered and contactless current sensor has great advantages of safety and reliability. By integrating the current sensing function and the energy harvesting function of current transformer (CT), a time-multiplexed self-powered wireless sensor that can measure the power transmission line current is presented in this paper. Two operating modes of CT, including current sensing mode and energy harvesting mode, are analyzed in detail. Through the design of mode-switching circuit, harvesting circuit and measurement circuit are isolated using only one CT secondary coil, which eliminates the interference between energy harvesting and current measurement. Thus, the accurate measurement in the current sensing mode and the maximum energy collection in the energy harvesting mode are both realized, all of which simplify the online power transmission line monitoring. The designed time-multiplexed working mode allows the sensor to work at a lower transmission line current, at the expense of a lower working frequency. Finally, the proposed sensor is verified by experiments.

scholarly journals Decentralized Estimation of Two-port Equivalents for Power Transmission Lines

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Vedanta Pradhan ◽  
O. D. Naidu ◽  
Sinisa Zubic ◽  
Patrick Cost
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Decentralized Estimation
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