Measuring device of converter station direct-current change-over switch, and measuring system and measuring method thereof

A technology of DC conversion and measurement device, applied in the field of electronics, can solve the problem that the micro measurement device cannot measure the voltage, etc., and achieve the effect of accurate synchronous measurement

Pending Publication Date: 2021-02-05
ANNING BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for high-voltage voltage measurement, large-scale high-voltage voltage divider resistors are commonly used, but micro-measurement devices cannot measure voltage through high-voltage voltage divider resistors.

Method used

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  • Measuring device of converter station direct-current change-over switch, and measuring system and measuring method thereof
  • Measuring device of converter station direct-current change-over switch, and measuring system and measuring method thereof
  • Measuring device of converter station direct-current change-over switch, and measuring system and measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Such as figure 1 As shown, a measuring device for the DC transfer switch of the converter station,

[0043] include,

[0044] The current measuring unit 101 is used for sampling the current of the LC oscillating circuit of the DC conversion switch and the top line of the arrester;

[0045] The electric field measuring unit 102 is used for sampling the electric field of the LC oscillating circuit of the DC conversion switch and the top line of the arrester;

[0046] The voltage-controlled oscillator 103 is used to output a precise clock signal and is also used for accurate synchronous sampling. The control terminal of the voltage-controlled oscillator 103 is connected to the controlled terminal of the electric field measurement unit 102. The voltage-controlled oscillator 103 The control is also connected to the controlled terminal of the current measurement unit 101, and the output terminal of the voltage-controlled oscillator 103 is connected to the input terminal of ...

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PUM

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Abstract

The invention relates to a measuring device of a converter station direct-current change-over switch, and a measuring system and a measuring method thereof. The measuring device comprises a current measuring unit, an electric field measuring unit, a frequency calculation and control unit, a voltage-controlled oscillator and a high-precision reference clock which are matched with each other. The device can be used for testing the electric field and current of the oscillation circuit of a direct-current circuit breaker and a lightning arrester of an ultrahigh-voltage and extra-high-voltage converter station, and can realize detailed monitoring of the state when the metal-ground of the direct-current change-over switch is mutually switched.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a measuring device, a measuring system and a measuring method for the electric field and current of a direct current transfer switch of an ultra-high voltage and ultra-high voltage converter station. Background technique [0002] The DC transfer switch is the key equipment of the DC field of the ultra-high voltage and ultra-high voltage DC project, and is mainly used for the conversion of various operating modes of the DC transmission system. Since the breaking of DC current does not take advantage of the zero-crossing point of AC current like that of AC current, the breaking of DC current must force zero-crossing. However, when the DC current is forced to cross zero, the DC system stores huge energy and needs to be released, and the released energy will generate an electric field on the circuit, causing the arc between the breaker breaks to re-ignite, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R29/12G01R19/00
CPCG01R19/00G01R29/12G01R31/3272
Inventor 刘劲松汪洋陈图腾张斌
Owner ANNING BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION
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