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A back-arc field emission current measurement and compensation system for arc extinguishing chamber

A field emission and current measurement technology, applied in the field of arc extinguishing chamber, can solve the problem of inability to compensate the field emission current online, and achieve the effect of online compensation

Active Publication Date: 2021-05-28
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect that the above-mentioned prior art cannot compensate the field emission current on-line, the present invention provides a measurement and compensation system for the field emission current after the arc extinguishing chamber

Method used

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  • A back-arc field emission current measurement and compensation system for arc extinguishing chamber
  • A back-arc field emission current measurement and compensation system for arc extinguishing chamber

Examples

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Embodiment 1

[0035] This embodiment provides a back-arc field emission current measurement and compensation system for an arc extinguishing chamber, such as figure 1 As shown, the system includes a recovery voltage measurement module, a field emission current measurement module and a current compensation module;

[0036] The recovery voltage measurement module includes a high voltage probe 1 and a first oscilloscope;

[0037] The field emission current measurement module includes a non-inductive resistor 2 and a second oscilloscope;

[0038] The current compensation module includes a differential circuit unit and an adder, and the adder includes a first input end of the adder, a second input end of the adder, and an output end of the adder;

[0039] The high-voltage probe 1 collects the voltage signal of the arc extinguishing chamber, the output end of the high-voltage probe 1 is connected to the input end of the first oscilloscope, the output end of the first oscilloscope is connected to...

Embodiment 2

[0045] This embodiment provides a back-arc field emission current measurement and compensation system for an arc extinguishing chamber, such as figure 2 As shown, the system includes a recovery voltage measurement module, a field emission current measurement module and a current compensation module;

[0046] The recovery voltage measurement module includes a high voltage probe 1 and a first oscilloscope;

[0047] The field emission current measurement module includes a non-inductive resistor 2 and a second oscilloscope;

[0048] The current compensation module includes a differential circuit unit and an adder, and the adder includes a first input end of the adder, a second input end of the adder, and an output end of the adder;

[0049] The high-voltage probe 1 collects the voltage signal of the arc extinguishing chamber, the output end of the high-voltage probe 1 is connected to the input end of the first oscilloscope, the output end of the first oscilloscope is connected t...

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Abstract

The invention provides a back-arc field emission current measurement and compensation system for an arc extinguishing chamber. The system includes a recovery voltage measurement module, a field emission current measurement module and a current compensation module. Wherein: the recovery voltage measurement module includes a high-voltage probe and a first oscilloscope for measuring the recovery voltage of the arc extinguishing chamber contact gap; the field emission current measurement module includes a non-inductive resistor and a second oscilloscope for measuring the non-inductive Resistance voltage; the obtained contact gap recovery voltage and the obtained back-arc non-inductive resistance voltage are adjusted and compensated by the current compensation module, and then output an accurate field emission current. The invention realizes the online compensation of the field emission current.

Description

technical field [0001] The invention relates to the technical field of arc extinguishing chambers, and more specifically, to a measurement and compensation system for field emission current after arc extinguishing for arc extinguishing chambers. Background technique [0002] The power system is an instant balance system. A large amount of reactive power will be generated during the operation of the system, and the reactive power will cause the voltage of the power system to deviate and cause losses; important role. When reactive power compensation is performed in the power system, switching capacitor banks is the most economical and effective way to generate reactive power. The vacuum circuit breaker can break it when the high frequency generated by pre-breakdown, re-ignition and re-breakdown crosses zero. There is a high risk of re-strike when switching back-to-back capacitor banks. Among them, the field emission current is considered to be one of the important factors c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 陈道品武利会陈邦发金向朝李强霍丹陈思翔何子兰
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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