Screening method for optimal phase sequence of quadruple circuit power transmission line on the same tower based on a self-built PSCAD/EMTDC phase sequence commutation module

2016 ◽  
Author(s):  
Yan Gao ◽  
Jinquan Zhao ◽  
Siyao Li ◽  
Xuemin Wang ◽  
Huanrui Liu
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Screening Method ◽  
Power Transmission Line ◽  
Phase Sequence ◽  
Circuit Power

scholarly journals Assessment of reliability of an overhead transmission line with a split back-up phase

2019 ◽  
Vol 11 (4) ◽  
pp. 294-298
Author(s):  
P. F. Vasilyev ◽  
A. S. Nesterov ◽  
V. P. Kobylin
Keyword(s):  
Transmission Line ◽  
Electric Power ◽  
Circuit Design ◽  
Power Transmission ◽  
Electrical Energy ◽  
Design Solution ◽  
Power Transmission Line ◽  
Overhead Transmission Line ◽  
Reliability Indicators ◽  
Circuit Power

Transmission of electrical energy is the most important component of an electric power system. Optimization, modernization of the electric power transport system, increasing the capacity, as well as variability of connection arrangements, while maintaining the required level of reliability and safety, is regarded today as an urgent task for the energy industry as a whole. The article is devoted to the problem of determining the efficiency of the circuit design solution for a double-circuit three-phase power transmission line with an additional mode of operation — «with a split back-up phase» and determining its main reliability indicators. A circuit design solution for a double-circuit power transmission line with expansion of operating modes is presented in detail. The functional redundancy of the transmission line in accordance with the circuit design solution is based on switching of a conventional double-circuit power transmission line in the emergency mode to the single-circuit split-phase mode, which is the second working circuit. The ways of increasing the natural power of a double-circuit power transmission line are considered. The results of calculation of the capacity of a line with a split back-up phase and a comparison of the main parameters of overhead transmission lines with an additional mode of operation — with a split back-up phase — and power lines in conventional modes of operation, are presented. The results of calculations of reliability indicators are presented, such as the probable relative number of hours of interruption of power supply and the undersupply of electrical energy. A comparison of options have shown that the probable relative under-supply of the electric power of a double-circuit overhead transmission line with an additional operating mode — with a split back-up phase, is lower by approximately 13% than that of a conventional double-circuit power line, which will positively affect the maneuverability and reliability of the entire system.

Stabilization of a Power Transmission Line Oscillations

2002 ◽  
Vol 29 (3-4) ◽  
pp. 9
Author(s):  
M. I. Kazakevitch ◽  
Ye. V. Horokhov ◽  
M. S. Khorol'sky ◽  
S. V. Turbin
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Power Transmission Line

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.

Sign in / Sign up

Export Citation Format

Share Document