Algorithm Research on Tower Grounding Resistance On-Line Measurement

2012 ◽  
Vol 239-240 ◽  
pp. 372-375
Author(s):  
Tao Wang ◽  
Bing Li ◽  
Hong Xing Yang
Keyword(s):  
Data Processing ◽  
Transmission Line ◽  
Matlab Simulation ◽  
Grounding Resistance ◽  
Line Measurement ◽  
On Line ◽  
Good Conductor

Traditional transmission line tower grounding resistance measurements have many shortcomings, in order to make up the defects the model of transmission line tower with good conductor wires and multiple grounding leads was builded, and then the algorithm of tower grounding resistance on-line measurement was proposed. On this condition, a system based on this algorithm was designed and further analysis of the error during data processing was conducted. At last, the MATLAB simulation indicates that the algorithm has a accuracy that meets the practical requirements.

scholarly journals On-line Measurement Method and Technical Scheme of Transmission Line Crossing Point Based on Machine Vision

2021 ◽  
Vol 2143 (1) ◽  
pp. 012035
Author(s):  
Jie Tang ◽  
Zhidu Huang ◽  
Zhimei Cui
Keyword(s):  
Machine Vision ◽  
Transmission Line ◽  
Measurement Method ◽  
Accuracy Measurement ◽  
Line Measurement ◽  
On Line ◽  
Increasing Demand ◽  
Measurement Efficiency ◽  
Crossing Point ◽  
Line Crossing

Abstract With the increasing demand for high voltage and UHV transmission, higher and higher requirements are put forward for transmission line monitoring and fault diagnosis. The traditional line measurement method has many shortcomings, which cannot ensure the measurement accuracy, measurement efficiency and high cost. Based on this, this paper first studies the principle of machine vision on-line measurement, then analyses the on-line measurement process of transmission line crossing point based on machine vision, and finally gives the error source and amelioration measures of transmission line crossing point on-line measurement.

A device for on-line electromigration measurements of radioelements in free electrolytes

2000 ◽  
Vol 88 (7) ◽  
Author(s):  
E. Mauerhofer ◽  
O. Kling ◽  
K. Hiller ◽  
Frank Rösch
Keyword(s):  
Data Processing ◽  
Processing System ◽  
Data Processing System ◽  
High Reproducibility ◽  
Γ Radiation ◽  
Line Measurement ◽  
On Line ◽  
Radioactive Species ◽  
Migration Velocities ◽  
Better Than

An electromigration device has been developed for the on-line measurement of absolute individual ion mobilities of radioactive species in free electrolytes. The device is composed of a migration cell, a γ-radiation scanning unit and a data processing system. The performance of two BGO-scintillators as scanning unit and the reliability of an on-line data processing system were studied with calibrated radioactive sources of given velocities. The system was found to work with a high reproducibility rate. The migration velocities were determined with an accuracy better than 1%.

scholarly journals Study on Energy Acquisition Scheme and Parameter Optimization for Double-Insulated Ground Wire of Overhead Transmission Lines

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Lifu He ◽  
Bo Li ◽  
Guoyong Zhang ◽  
Xiudong Zhou ◽  
Jing Luo
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Equivalent Circuit Analysis ◽  
Load Impedance ◽  
Grounding Resistance ◽  
Overhead Transmission Line ◽  
Acquisition Scheme ◽  
On Line ◽  
Energy Acquisition ◽  
Analysis Models

An energy acquisition system for the ground wire of an overhead transmission line can provide a continuous and stable power supply for an on-line monitoring device. Its key issue is how to obtain enough power. To solve this problem, an energy acquisition scheme based on the double-insulated ground wire of an overhead transmission line has been investigated in this study. Three energy acquisition schemes were proposed, equivalent circuit analysis models of the three energy acquisition schemes were established, and the maximum power acquired was theoretically analyzed. The energy acquisition power of the three energy acquisition schemes for different tower-type sizes was also analyzed. A simulation model was built in PSCAD. The effects of load impedance, length of energy acquisition wire, grounding resistance, and load current on the power acquired were analyzed. The research results of this paper provide theoretical guidance for choosing an energy acquisition scheme and for designing key parameters in practice.

Thickness Measurement in the AEM by Macintosh-Based Analysis of Two-Beam Convergent Beam Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 504-505
Author(s):  
John F. Mansfield ◽  
Douglas C. Crawford
Keyword(s):  
Electron Microscope ◽  
Video Camera ◽  
Thickness Measurement ◽  
Specimen Thickness ◽  
Crystalline Materials ◽  
Beam Dynamic ◽  
Line Measurement ◽  
On Line ◽  
Image Position ◽  
Convergent Beam

A method has been developed that allows on-line measurement of the thickness of crystalline materials in the analytical electron microscope. Two-beam convergent beam electron diffraction (CBED) patterns are digitized from a JEOL 2000FX electron microscope into an Apple Macintosh II microcomputer via a Gatan #673 CCD Video Camera and an Imaging Systems Technology Video 1000 frame-capture board. It is necessary to know the lattice parameters of the sample since measurements are made of the spacing of the diffraction discs in order to calibrate the pattern. The sample thickness is calculated from measurements of the spacings of the fringes that are seen in the diffraction discs. This technique was pioneered by Kelly et al, who used the two-beam dynamic theory of MacGillavry relate the deviation parameter (Si) of the ith fringe from the exact Bragg condition to the specimen thickness (t) with the equation:Where ξg, is the extinction distance for that reflection and ni is an integer.

Control Strategies for a Highly Loaded Biological Ammonia Elimination Process

1993 ◽  
Vol 28 (11-12) ◽  
pp. 531-538 ◽  
Author(s):  
B. Teichgräber
Keyword(s):  
Closed Loop ◽  
Control Strategies ◽  
Level Control ◽  
Sludge Dewatering ◽  
Loop Control ◽  
Reject Water ◽  
Line Measurement ◽  
Control Pattern ◽  
On Line ◽  
Treatment Facilities

A nitrification/denitrification process was applied to reject water treatment from sludge dewatering at Bottrop central sludge treatment facilities of the Emschergenossenschaft. On-line monitoring of influent and effluent turbidity, closed loop control of DO and pH, and on-line monitoring of nitrogen compounds were combined to a three level control pattern. Though on-line measurement of substrate and product showed substantial response time it could be used to operate nitrification/denitrification within process boundaries.

On-line measurement of pulverized coal fineness on a 300 MWe power plant with pulsed digital inline holography

2021 ◽  
Author(s):  
Qiwen Jin ◽  
Xijiong Chen ◽  
Pei Li ◽  
Yonggang Zhou ◽  
Yingchun Wu ◽  
...  
Keyword(s):  
Power Plant ◽  
Pulverized Coal ◽  
Line Measurement ◽  
On Line
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