Valve arrester action monitor calibration instrument

A lightning arrester and monitor technology, which is applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of inability to successfully calibrate and unsatisfactory results, and achieve the effects of uniform voltage division between capacitors, high test voltage, and reduced volume

Inactive Publication Date: 2018-03-30
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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AI Technical Summary

Problems solved by technology

[0003] During many annual preventive tests of the converter station, the traditional lightning strike counter calibrator was used to calibrate the action monitor of the valve arrester, but the effect was not ideal, and most of them could not be calibrated successfully. It is urgent to study a new type of calibrator. Not only can the valve arrester action monitor operate normally, but also can actively detect the action signal

Method used

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  • Valve arrester action monitor calibration instrument
  • Valve arrester action monitor calibration instrument
  • Valve arrester action monitor calibration instrument

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Embodiment 1

[0050] 1. Instructions for generating high voltage:

[0051] Adopting the high-frequency voltage doubler rectification mode can reduce the volume of the step-up transformer and the volume of the voltage doubler rectifier circuit.

[0052] Such as Figure 4 , T1 high-frequency transformer in the figure, the primary adopts PWM pulse width modulation mode, uses single-ended flyback mode to boost the low-voltage voltage 12V to high-voltage, and then obtains the required high-voltage voltage through voltage doubler rectification, R1 is used as a current-limiting resistor, R5 , R6, R7, R8, R12 form a voltage divider, and the voltage divider is used as high voltage feedback and high voltage measurement.

[0053] When the high voltage is set to 5000V, the feedback voltage is divided into 5000V*(100K / 160M)=3.12V. When the actual output voltage is not 3.12V, the PWM pulse width modulation (PWM-Ctr) will continue to increase the output pulse Wide, until the high-voltage voltage meets the...

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Abstract

The invention provides a valve arrester action monitor calibration instrument which comprises a booster and an optoelectronic receiver. The booster and the optoelectronic receiver are respectively connected to a valve arrester action monitor. The booster is used for generating and adjusting high voltage and acting on the valve arrester action monitor. The optoelectronic receiver is used for receiving an action light signal of the valve arrester action monitor and locking the action signal. The booster includes a high voltage generating circuit, a modulation adjustment circuit and a measurementdisplay circuit, and the high voltage generating circuit is connected to the modulation adjustment circuit and the measurement display circuit. The high frequency voltage-doubler rectification technology is used in the invention, the volume of a step-up transformer and the volume of a voltage-doubler rectifier circuit are reduced, high test voltage can be generated and large capacity charge is stored, voltage division between capacitors is uniform, discharge without damage is achieved, the valve arrester action monitor can effectively act, and the action signal is received and locked.

Description

technical field [0001] The invention relates to the field of equipment manufacturing, in particular to a valve arrester action monitor calibrator. Background technique [0002] The valve arrester is an important device to protect the converter valve from overvoltage damage. Its action monitor is the only device to monitor whether the valve arrester operates. This type of device is different from the magnetoelectric structure of the discharge counter of other position arresters. The structure of the valve arrester action monitor is a photoelectric structure, that is, the device includes a discharge gap, which is connected in parallel with a coil resistance. When the arrester is in normal operation, the resistance flows through the normal leakage current; when the overvoltage occurs, the voltage at both ends of the resistance rises and discharges to the gap. The light signal generated by the discharge is transmitted to the background through the optical fiber. [0003] Durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 刘春涛刘俊谭华安叶建铸齐向东谷裕黄学民陈为庆戚科孙
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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