The Research on the Matching Method of High Voltage Arm Resistors for the High DC Voltage Dividers

2013 ◽  
Vol 718-720 ◽  
pp. 1482-1486
Author(s):  
Huang Hui Zhang ◽  
Jian Kang Song ◽  
Fei Peng Lin ◽  
Hai Ming Shao ◽  
Dan Lv ◽  
...  
Keyword(s):  
High Precision ◽  
High Voltage ◽  
Voltage Divider ◽  
Power Coefficient ◽  
Value Change ◽  
Matching Method ◽  
Dc Voltage ◽  
Voltage Coefficient ◽  
Voltage Variation ◽  
The Stability

The stability of the high voltage arm resistors has a strong influence on the performance of the resistance high DC voltage divider. So by analyzing the main parameters that affect the resistor value change, including voltage coefficient, power coefficient and so on, a new matching method is proposed to make a high precision high DC voltage divider in this paper. Based on the principle of pairing the resistors and adjusting the big and small ones, a high precision high DC voltage divider could be made with the voltage variation less than 0.005%, even on the condition of using high voltage coefficient and power coefficient resistors.

A high-precision high-voltage divider applied to electron beam energy measurements

2011 ◽  
Vol T144 ◽  
pp. 014063
Author(s):  
W Zhang ◽  
W Chen ◽  
M L Qiu ◽  
Y Q Fu ◽  
R Hutton ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Precision ◽  
High Voltage ◽  
Beam Energy ◽  
Voltage Divider ◽  
Electron Beam Energy

A Highly Stable 150 KV Supply

1971 ◽  
Vol 29 ◽  
pp. 8-9
Author(s):  
N. F. Ziegler
Keyword(s):  
High Voltage ◽  
Wide Band ◽  
Voltage Divider ◽  
Output Impedance ◽  
High Voltage Power Supply ◽  
Band Noise ◽  
Capacitive Divider ◽  
Cathode Follower ◽  
The Stability ◽  
Wide Band Noise

A high voltage power supply has been constructed for use with the ORNL Superconducting Microscope described elsewhere in these proceedings. A simplified schematic diagram of the system is shown in Figure 1. The regulator circuit employs a “bouncer” with a cathode-follower output. This configuration results in a low output impedance and the bouncer can thus drive a load capacitance over a wider bandwidth than the conventional common-cathode circuit. The voltage divider for the regulator is a dual unit originally developed to determine the stability of resistive high-voltage dividers. A dual capacitive divider is an integral part of the voltage divider as shown in Figure 1. The dual units have proven to be very useful in practice since one divider may be used in the regulator while the second is used to monitor the noise present on the high voltage. Mercury cells are used as reference elements in the regulator. Wide-band noise on the output is about one ppm at present. Modifications are now under way to eliminate at least two of the known sources of noise in the system.

Blocking Analysis of HVDC Caused by DC Voltage Divider with OPDL System

2011 ◽  
Vol 354-355 ◽  
pp. 993-997
Author(s):  
Xing Qi He
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Architectural Design ◽  
Voltage Divider ◽  
Transmission System ◽  
Dc Voltage ◽  
High Voltage Direct Current ◽  
Current Voltage ◽  
Direct Current Voltage ◽  
Blocking Analysis

A blocking accident was described which was caused by the architectural design bug of high-voltage direct current voltage divider. The bug of DC voltage divider architecture design was pointed out through the analysis, and the appropriate solutions for the similar bug or hidden trouble in high-voltage DC transmission system was proposed.

Method to determine the voltage coefficient of a dc high-voltage divider

2003 ◽  
Vol 52 (2) ◽  
pp. 469-473 ◽  
Author(s):  
Kyu-Tae Kim ◽  
Sang-Hwa Lee ◽  
Jae Kap Jung ◽  
Yang Sup Song
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
Voltage Coefficient

The Research of Divider Voltage Variation Measurement Based on Serial and Parallel Double-Voltage Method

2013 ◽  
Vol 718-720 ◽  
pp. 825-829
Author(s):  
Fei Peng Lin ◽  
Huang Hui Zhang ◽  
Hai Ming Shao ◽  
Yan Qiang Li ◽  
Wen Feng Li
Keyword(s):  
Measurement Uncertainty ◽  
High Voltage ◽  
Measurement Method ◽  
Voltage Divider ◽  
Generation Mechanism ◽  
Voltage Variation ◽  
Parallel Voltage ◽  
Better Than

The paper analyzed voltage variation generation mechanism of DC high voltage divider advances high voltage divider variation measurement method---serial and parallel voltage double-method, verifies the establishment condition of series and parallel double-voltage method in theory, measures the voltage variation of DC high voltage divider through experiment, the measurement uncertainty is better than 10-6.

High precision high voltage divider and its application to electron beam ion traps

2008 ◽  
Vol 79 (12) ◽  
pp. 123304 ◽  
Author(s):  
W. D. Chen ◽  
J. Xiao ◽  
Y. Shen ◽  
Y. Q. Fu ◽  
F. C. Meng ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Precision ◽  
High Voltage ◽  
Voltage Divider ◽  
Ion Traps

Traceability of DC and AC high voltage measurements using voltage divider calibration

2018 ◽  
Vol 55 (2) ◽  
pp. 109-119 ◽  
Author(s):  
Hala M Abdel Mageed ◽  
Faisal Q Alenezi
Keyword(s):  
High Voltage ◽  
International System ◽  
Voltage Divider ◽  
Calibration Method ◽  
Industrial Applications ◽  
Theory And Practice ◽  
National Standards ◽  
Dc Voltage ◽  
Acceptable Accuracy ◽  
System Of Units

This paper focuses on achieving traceability of high voltage measurements up to 200 kV at the Egyptian National Institute of Standards. The measurement system consists of an AC/DC voltmeter and a universal resistive/capacitive high voltage divider. The voltmeter shows measured voltage values based on the scale factor of the voltage divider. The divider ensures a stable capacitance for AC voltage measurements and an additional resistive parallel path for DC voltage measurements. Both the divider and the voltmeter are calibrated in AC and DC modes. All uncertainty components are taken into account to obtain measured values with an acceptable accuracy. The calibration results in traceability to the national standards, which make measurements using the international system of units. The proposed calibration method is useful for the theory and practice of high voltage measurements in education, industrial applications, and electrical metrology studies.

100 KV Scanning Microscope

1972 ◽  
Vol 30 ◽  
pp. 472-473 ◽  
Author(s):  
A. V. Crewe ◽  
M. W. Retsky
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
Electron Gun ◽  
Objective Lens ◽  
Parallel Beam ◽  
Emission Point ◽  
Error Amplifier ◽  
External Reference ◽  
Scanning Transmission ◽  
Transmission Microscope

A 100 kv scanning transmission microscope has been built. Briefly, the design is as follows: The electron gun consists of a field emission point and a 3 cm Butler gun. The beam has a crossover outside the gun and is collimated by a condenser lens.The parallel beam passes through a defining aperture and is focused by the objective lens onto the specimen. The elastic electrons are detected by two annular detectors, each subtending a different angle, and the unscattered and inelastic electrons are collected by a third detector. The spectrometer that will separate the inelastic and unscattered electrons has not yet been built.The lens current supplies are stable to within one part per million per hour and have been described elsewhere.The high voltage is also stable to 1 ppm/hr. It consists of the raw supply from a 100 kv Spellman power supply controlled by an external reference voltage, high voltage divider, and error amplifier.

Study on Selective Leakage Protection System of Mine High Voltage Grid Based on Harmonic Phase Comparison

2015 ◽  
Vol 9 (1) ◽  
pp. 253-262
Author(s):  
Liu Zhongfu ◽  
Zhang Junxing ◽  
Shi Lixin ◽  
Yang Yaning
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Neutral Point ◽  
Arc Suppression Coil ◽  
Zero Sequence ◽  
Harmonic Extraction ◽  
Power Direction ◽  
The Stability

As for the wide application of arc suppression coil to the grounding in neutral point of mine high voltage grid, grid leakage fault rules and harmonic characteristics of the neutral point grounding system through arc suppression coil are analyzed, the selective leakage protection program “zero-sequence voltage starts, fifth harmonics of grid zerosequence voltage and zero-sequence current are extracted for phase comparison” is proposed, and corresponding fifth harmonic extraction circuit and power direction discrimination circuit are designed. The experimental results show that the protective principle applies not only to the neutral point insulated power supply system, but also to the power supply system in which neutral point passes arc suppression coil, which can solve selective leakage protection problems under different neutral grounding ways, improving the reliability of selective leakage and guaranteeing the stability of the action value.

scholarly journals Demulsification of Liquid Membrane Emulsion using High Voltage Glass Coated Electrode in Batch System

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
N. Othman ◽  
A. Ahmad ◽  
M. A. Piramali
Keyword(s):  
High Voltage ◽  
Liquid Membrane ◽  
Alternate Current ◽  
Cost Effective ◽  
Electrical Field ◽  
Electrical Field Strength ◽  
Oil Emulsion ◽  
Internal Phase ◽  
The Stability ◽  
Time Required

Demulsification is one of the key processes in emulsion liquid membrane application. This study involved the effect of electrical field on demulsification of water in oil using batch high voltage demulsifier system. This technique widely used because of its advantages of easy manipulation of applied field direction and strength, offers cost–effective separation and minimal environmental impact combined with mechanical simplicity. Influence of various values of frequency (400–1500 Hz) and voltage was studied experimentally using Alternate Current (AC) High Voltage Demulsifier with insulated electrode. The emulsion consists of kerosene as organic phase, sulfuric acid as internal phase and span 80 (3 and 5 w/v %) as a surfactant. The effect of emulsion preparation such as homogenizer speed, internal phase and surfactant concentrations on the stability of water–in–oil emulsion was also investigated. The results showed that the attractive forces between the water droplets under an electrical field increase by raising the applied electrical field strength. Meanwhile, the time required for the emulsion to separate and coalescence under electrical field increased when the stability of emulsion increased.

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