Control device and method for potential transfer current and arc in UHV live working

A technology for live operation and current transfer, applied in overhead lines/cable equipment, etc., it can solve the problems of decreased dielectric strength of gaps, large arc contact gaps, and large potential currents, and achieves reduction in arc energy and length, and arc length reduction. , the effect of the simple method

Active Publication Date: 2020-08-28
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of workers entering and exiting the equipotential, the potential current is too large, the arc is too long and the gap is too large, which may lead to a decrease in the insulation strength of the gap and cause a discharge accident

Method used

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  • Control device and method for potential transfer current and arc in UHV live working
  • Control device and method for potential transfer current and arc in UHV live working
  • Control device and method for potential transfer current and arc in UHV live working

Examples

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Embodiment 1

[0024] The invention of this example provides a control device and control method for potential transfer current and arc in UHV live working. Too long drawing arc will affect the insulation performance of the gap, which can effectively improve the safety of operators. Combined with the characteristics of the potential transfer rod operation in the process of entering and leaving the equipotential, the potential transfer current and the arc control loop are introduced, and the arc suppression control is realized by limiting the magnitude of the potential transfer current and the changed phase:

[0025] Insert an inductance 2 and resistance 3 loop in series in the potential transfer loop, as attached figure 1 As shown, in the process of entering and exiting the equipotentiality, the bypass switch 4 is in the open state, the potential transfer and the arc control loop enter the working mode, due to the effect of the inductance 2 and the resistance 3, the transient capacitance bet...

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Abstract

The present invention relates to a control device and method for potential transfer current and arc in UHV live work, the control device includes a potential transfer device, and the potential transfer device includes a potential transfer circuit; a potential transfer circuit is connected in series A control loop: the potential transfer device transfers the potential through the potential transfer loop, and limits the amplitude and arc length of the current generated during the potential transfer process through the control loop. The technical scheme of the invention is used to solve the influence of the potential transfer current amplitude on personnel and equipment during the potential transfer process of UHV live working, solve the effect of excessive arc drawing on the gap insulation performance, and effectively improve the safety of operators.

Description

technical field [0001] The invention relates to the field of live work, and more particularly relates to a control device and control method for potential transfer current and arc of UHV live work. Background technique [0002] Live work is a kind of operation method for maintenance and testing of power grid equipment without power failure or changing operation mode, which is of great significance to ensure the safety and reliability of power grid operation. For the live work of 110kV and above power grid equipment, the equipotential work method is mainly used, which has the advantages of simplicity, safety and high labor efficiency. Entering the equipotential is a key step in carrying out operations. When overhauling power grid equipment with a voltage level of 500kV and below, the amplitude of the potential transfer current is small, and the arcing distance is also small, which generally does not cause harm to operators and equipment. obvious impact. When performing live...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 吴田刘凯彭勇刘庭肖宾苏梓铭唐盼刘艳
Owner CHINA ELECTRIC POWER RES INST
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