Capacitive voltage divider
A technology of capacitive voltage divider and low-voltage arm capacitor, which is applied in the direction of voltage divider, voltage/current isolation, etc., can solve the problems of large fluctuation of scale factor and unguaranteed linearity, and achieve simple structure, small damping resistance and high performance stable effect
Pending Publication Date: 2017-05-10
CHINA ELECTRIC POWER RES INST +1
View PDF6 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the different media of the high and low voltage arms, their temperature coefficients and voltage coefficients are also different, and the scale factor fluctuates greatly. Generally, only 3% accuracy can be guaranteed, and the linearity cannot be guaranteed. It cannot be used as a standard voltage divider to measure the transient state. Signal
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0032] Such as figure 1 As shown, a capacitive voltage divider includes a high-voltage guide rod, a damping resistor, a pressure equalizing ring, an upper flange, a glass fiber bushing, a high-voltage electrode, a data acquisition and wireless transmission device, a grounding electrode 1, a low-voltage electrode, and a grounding electrode 2. Insulating material plate and lower flange;
[0033] Among them, the high-voltage electrode, low-voltage electrode, ground electrode 1 and ground electrode 2 are all made of integral metal aluminum, the low-voltage electrode is connected to the lower flange through an insulating material block, the ground electrode 1 and ground electrode 2 are directly connected to the lower flange, and the lower flange is grounded . The pressure divider housing is filled with SF6 gas at 5 atmospheres. Use the principle o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a capacitive voltage divider, and the voltage divider comprises an upper flange and a lower flange, which are installed at the top and bottom of a glass fiber sleeve. A high-voltage electrode installed in the glass fiber sleeve is connected with the upper flange, and a low-voltage electrode installed in the glass fiber sleeve is connected with the lower flange through an insulating material plate. The voltage divider is simple in structure, is convenient for installation and conveying, and is stable in performance. A high-voltage arm capacitor is disposed between shielding capacitors, and is not affected by external stray capacitance. The internal structure of the voltage divider is a pure capacitor, and has no inductor, so the voltage divider is good in frequency response. A high-voltage lead employs a metal guide rod, is low in stray inductance, and is small in damping resistance.
Description
technical field [0001] The invention relates to a voltage divider, in particular to a capacitive voltage divider for measuring impulse voltage signals. Background technique [0002] The impulse voltage withstand test of power equipment is to simulate the voltage of the power system transmission line subjected to lightning impulse and the impulse voltage when the switch is opened and closed. The parameters that need to be measured during the test include the amplitude and time of the impulse voltage, and the impulse voltage divider involved is a voltage conversion device, which converts the high-voltage impulse voltage signal into a low-voltage signal that can be measured by the secondary measurement device. [0003] The impact voltage divider is mainly divided into two types: the resistance voltage divider and the capacitance voltage divider. The resistance voltage divider has the advantages of excellent step wave response, small waveform distortion, and good scale factor st...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01R15/06
CPCG01R15/06G01R15/16
Inventor 刘高佳龙兆芝涂琛孙浩良耿志辉李智成
Owner CHINA ELECTRIC POWER RES INST