Capacitance-adjusting type arc suppression coil complete device and operation mod of same

A technology for arc suppression coils and complete sets of equipment, which is applied to emergency protection circuit devices, electrical components, and circuit devices for limiting overcurrent/overvoltage, and can solve the problem of affecting the service life of vacuum contactors and increasing the number of vacuum contactor actions To reduce the number of mechanical actions, eliminate potential safety hazards, and prolong the life of equipment

Active Publication Date: 2011-01-19
上海思源光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The switching method of the current equipment is vacuum contactor switching. In this way, the calculation of switching times makes the number of vacuum contactor actions significantly increased, which affects the service life of the vacuum contactor.

Method used

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  • Capacitance-adjusting type arc suppression coil complete device and operation mod of same
  • Capacitance-adjusting type arc suppression coil complete device and operation mod of same
  • Capacitance-adjusting type arc suppression coil complete device and operation mod of same

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Embodiment Construction

[0035] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0036] The complete set of equipment provided by the invention is used in a 6kV-66kV neutral point grounding system through an arc-suppression coil, and can realize functions such as calculation of system capacitance current, automatic compensation, fault recording, and resistance line selection in parallel connection.

[0037] The present invention adopts the damping resistor placed on the secondary side and the design of the gear memory function, so that the complete set of equipment can not only prevent resonance, but also the compensation gear of the arc suppression coil does not change when the power is restored, and it is not easy to frequently adjust gears when the power is restored. .

[0038] see figure 1 , The complete set of equipmen...

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Abstract

The invention discloses an operation mode of capacitance-adjusting type arc suppression coil complete device. A damping resistance is arranged at the secondary winding side of the arc suppression coil, so as to prevent a system from generating resonance under normal condition, when in single phase earth fault, a secondary damping resistance automatically exits, the capacitance-adjusting type arc suppression coil automatically compensates induced current, residual current at fault point is restricted to be in the required range; wherein the operation mode that presetting is combined with real time adjusting is adopted, so that impact to system which is caused by system compensation is less, thus being safe and reliable.

Description

technical field [0001] The invention relates to a complete set of equipment for neutral point small current grounding compensation of a power distribution system, in particular to a complete set of capacity-adjusting arc-suppression coil equipment and the operation mode of the corresponding arc-suppression coil. Background technique [0002] With the continuous development of the power system, the power transmission capacity of the power grid is getting larger and larger. When a single-phase ground fault occurs, the system capacitive current flowing through the ground point is also increasing. The system capacitance current is compensated. The domestic power system generally adopts the neutral point operation mode in which the neutral point is connected to the arc suppression coil, that is, the neutral point resonance grounding mode. The inductive current flowing through the arc suppression coil under fault conditions is used to control the system capacitive current flowing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/08
Inventor 李刚易新超陈鹏飞魏立新
Owner 上海思源光电有限公司
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