scholarly journals Non-contact voltage measurement of three-phase overhead transmission line based on electric field inverse calculation

2018 ◽  
Vol 12 (12) ◽  
pp. 2952-2957 ◽  
Author(s):  
Dongping Xiao ◽  
Yutong Xie ◽  
Qichao Ma ◽  
Qi Zheng ◽  
Zhanlong Zhang
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Voltage Measurement ◽  
Overhead Transmission Line ◽  
Contact Voltage ◽  
Three Phase

scholarly journals Research on UAV Three-Phase Transmission Line Tracking and Localization Method Based on Electric Field Sensor Array

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8400
Author(s):  
Chunguang Suo ◽  
Jiawen Zhao ◽  
Wenbin Zhang ◽  
Peng Li ◽  
Rujin Huang ◽  
...  
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
Sensor Array ◽  
Absolute Error ◽  
Maximum Absolute Error ◽  
Electric Field Sensor ◽  
Three Phase ◽  
Line Tracking ◽  
Phase Transmission

The tracking and positioning of transmission lines is a key element for UAVs (Unmanned Aerial Vehicles) to achieve autonomous inspection of transmission lines. Current methods are vulnerable to weather and environmental factors, have high costs, and have difficulties in data processing. Therefore, this paper proposes a transmission line tracking and localization method based on the electric field sensor array, which calculates the current UAV’s heading angle deflection angle, the distance between the transmission line and the UAV, and the elevation angle, providing a new idea to solve the problem of UAV inspection of transmission lines. At the same time, the electric field distribution of different arrangements of three-phase transmission lines was analyzed using COMSOL to determine the flight area of the UAV. By comparing the electric field distribution of the UAV flight area and single-phase transmission lines, it was verified that the current method is also applicable in the three-phase transmission line scenario, and it was further verified that the sensor array used can sense the change of the UAV position in the flight area, indicating that the electric field sensor array can realize the transmission line tracking and localization of transmission lines. The experimental results showed that, in the three-phase transmission line scenario, when the sensor array moves along the transmission straight wire, the maximum absolute error of the heading angle deflection angle calculated according to this method was 8.2°, the maximum absolute error of the distance between the array and the transmission line was 19.3 cm, and the maximum absolute error of the elevation angle was 11.37°; the error was within a reasonable range and can be used for the UAV to realize autonomous inspection.

scholarly journals Evaluation of Electric Field Integral Voltage Measurement Method of Transmission Line Based on Error Transmission and Uncertainty Analysis

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4340
Author(s):  
Jiarui Fan ◽  
Cheng Ai ◽  
Aofei Guo ◽  
Xiaojun Yan ◽  
Jingang Wang
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Numerical Integration ◽  
Error Propagation ◽  
Evaluation Criteria ◽  
Propagation Model ◽  
Voltage Measurement ◽  
Line Voltage ◽  
Integration Algorithms ◽  
Accuracy And Stability

Electric field numerical integration algorithms can realize the non-contact measurement of transmission line voltage effectively. Although there are many electric field numerical integration algorithms, lack of a comprehensive comparison of accuracy and stability among various algorithms results in difficulties in evaluating the measurement results of various algorithms. Therefore, this paper presents the G-L (Gauss–Legendre) algorithm, the I-G-L (improved Gauss–Legendre) algorithm, and the I-G-C (improved Gauss–Chebyshev) algorithm and proposes a unified error propagation model of the derived algorithms to assess the accuracy of each integration method by considering multiple error sources. Moreover, evaluation criteria for the uncertainty of transmission line voltage measurement are proposed to analyze the stability and reliability of these algorithms. A simulation model and experiment platform were then constructed to conduct error propagation and uncertainty analyses. The results show that the G-L algorithm had the highest accuracy and stability in the scheme with five integral nodes, for which the simulation error was 0.603% and the relative uncertainty was 2.130%. The I-G-L algorithm was more applicable due to the smaller number of integral nodes required, yet the algorithm was less stable in achieving the same accuracy as the G-L algorithm. In addition, the I-G-C algorithm was relatively less accurate and stable in voltage measurement.

scholarly journals Distribution of Voltage Induced by Parallel Transmission Line Along Dead and Grounded Line

2015 ◽  
Vol 4 (2) ◽  
pp. 48-55
Author(s):  
Токарский ◽  
A. Tokarskiy ◽  
Рубцова ◽  
Nina Rubtsova
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Dead Zone ◽  
Calculation Algorithm ◽  
Parallel Transmission ◽  
Overhead Transmission Line

Calculation algorithm for Currents and voltages induced by electric field of operating overhead transmission line (OTL) along dead and grounded parallel OTL is presented. The data indicates the coincidence of the results of calculation under OTL parameters outside the "dead zone" obtained by Carson’ method and calculation with hequ method not having a "dead zone".

Distribution of Currents and Voltages, Induced by Electric Field of Three-Phase Overhead Transmission Line along the Grounded Phase/Cable of Disconnected Parallel Power Line

2020 ◽  
Vol 9 (1) ◽  
pp. 31-40
Author(s):  
D. Demchenko ◽  
N. Rubcova ◽  
V. Ryabchenko ◽  
A. Tokarskiy
Keyword(s):  
Electric Field ◽  
Transmission Lines ◽  
Power Line ◽  
Induced Voltage ◽  
Limit Values ◽  
Health Maintenance ◽  
Overhead Transmission Line ◽  
Overhead Transmission Lines ◽  
Three Phase ◽  
Overhead Power Line

The health maintenance of linemen working at overhead transmission lines under induced voltage requires compliance of these voltages’ limit values. To ensure compliance with these requirements have been developed algorithms for calculating of currents and voltages distribution along the grounded phase/cable of disconnected power line, induced by the electric field of operating three-phase overhead power line without transposition, with full and incomplete complete phases transposition section .

scholarly journals Study and Experiment on Non-Contact Voltage Sensor Suitable for Three-Phase Transmission Line

Sensors ◽  
2015 ◽  
Vol 16 (1) ◽  
pp. 40 ◽  
Author(s):  
Qiang Zhou ◽  
Wei He ◽  
Dongping Xiao ◽  
Songnong Li ◽  
Kongjun Zhou
Keyword(s):  
Transmission Line ◽  
Voltage Sensor ◽  
Contact Voltage ◽  
Three Phase ◽  
Phase Transmission

scholarly journals Research on Transmission Line Voltage Measurement Method of D-Dot Sensor Based on Gaussian Integral

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2455 ◽  
Author(s):  
Jingang Wang ◽  
Yanhang Zhao ◽  
Wenjiang Li ◽  
Xianglong Zeng ◽  
Juan Tang ◽  
...  
Keyword(s):  
Inverse Problem ◽  
Electric Field ◽  
Transmission Line ◽  
Measurement System ◽  
Measurement Method ◽  
Voltage Measurement ◽  
Line Voltage ◽  
Voltage Sensors ◽  
Gaussian Integral ◽  
Sensor Voltage

D-dot sensors meet the development trend towards the downsizing, automation and digitalization of voltage sensors and is one of research hotspots for new voltage sensors at present. The traditional voltage measurement system of D-dot sensors makes possible the reverse solving of wire potentials according to the computational principles of the electric field inverse problem by measuring electric field values beneath the transmission line. Nevertheless, as it is limited by the solving method of the electric field inverse problem, the D-dot sensor voltage measurement system is struggling with solving difficulties and poor accuracy. To solve these problems, this paper suggests introducing a Gaussian integral into the D-dot sensor voltage measurement system to accurately measure the voltage of transmission lines. Based on studies of D-dot sensors, a transmission line voltage measurement method based on Gaussian integrals is proposed and used for the simulation of the electric field of a 220 kV and a 20 kV transmission line. The feasibility of the introduction of the Gaussian integral to solve transmission line voltage was verified by the simulation results. Finally, the performance of the Gaussian integral was verified by an experiment using the transmission line voltage measurement platform. The experimental results demonstrated that the D-dot sensor measurement system based on a Gaussian integral achieves high accuracy and the relative error is lower than 0.5%.

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