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Grid current-limiting device and system design

A technology of current limiting device and power grid, which is applied in the direction of circuit device, emergency protection circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc., and can solve the problem of inability to limit the current of the power grid and the lack of installation and adjustment mechanism of the current limiting device , Affect the installation efficiency of the current limiting device of the power grid, etc., to achieve the effect of improving the current limiting effect, improving the installation efficiency, and facilitating the installation

Inactive Publication Date: 2019-08-23
沙志成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the composition mechanism of the current limiting device of the power grid in the prior art is relatively simple, and the outside of the current limiting device lacks a certain installation adjustment mechanism, which affects the installation efficiency of the current limiting device of the power grid, and the system composition of the current limiting system is comparatively relatively simple. Simple, unable to effectively limit the current of the power grid, and propose a power grid current limiting device and system design

Method used

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  • Grid current-limiting device and system design

Examples

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Embodiment 1

[0039] refer to Figure 1-2 , a power grid current limiting device and system design, including a base 1 and a support plate 2, the support plate 2 is horizontally arranged above the base 1, a cavity 3 is provided in the base 1 for setting a load-bearing rod 4, and the cavity 3 A load-bearing rod 4 is connected in rotation for supporting the support plate 2;

[0040] The load-bearing rod 4 is fixedly sleeved with a first gear 5 for driving the rotating rod 7 to rotate. A second gear 6 meshing with the first gear 5 is provided in the cavity 3 for driving the first gear 5 to rotate. The second gear 6 is rotationally connected with the inner wall of the cavity 3 through a rotating rod 7;

[0041] One end of the rotating rod 7 runs through the inner wall of the cavity 3 and is fixedly connected with a knob 8 for driving the rotating rod 7 to rotate, and the bottom of the supporting plate 2 is fixedly connected with a plurality of supporting rods 9 for supporting the supporting pl...

Embodiment 2

[0053] refer to Figure 1-2 , a power grid current limiting device and system design, including a base 1 and a support plate 2, the support plate 2 is horizontally arranged above the base 1, a cavity 3 is provided in the base 1 for setting a load-bearing rod 4, and the cavity 3 A load-bearing rod 4 is connected in rotation for supporting the support plate 2;

[0054]The load-bearing rod 4 is fixedly sleeved with a first gear 5 for driving the rotating rod 7 to rotate. A second gear 6 meshing with the first gear 5 is provided in the cavity 3 for driving the first gear 5 to rotate. The second gear 6 is rotationally connected with the inner wall of the cavity 3 through a rotating rod 7;

[0055] One end of the rotating rod 7 runs through the inner wall of the cavity 3 and is fixedly connected with a knob 8 for driving the rotating rod 7 to rotate, and the bottom of the supporting plate 2 is fixedly connected with a plurality of supporting rods 9 for supporting the supporting pla...

Embodiment 3

[0067] refer to Figure 1-2 , a power grid current limiting device and system design, including a base 1 and a support plate 2, the support plate 2 is horizontally arranged above the base 1, a cavity 3 is provided in the base 1 for setting a load-bearing rod 4, and the cavity 3 A load-bearing rod 4 is connected in rotation for supporting the support plate 2;

[0068] The load-bearing rod 4 is fixedly sleeved with a first gear 5 for driving the rotating rod 7 to rotate. A second gear 6 meshing with the first gear 5 is provided in the cavity 3 for driving the first gear 5 to rotate. The second gear 6 is rotationally connected with the inner wall of the cavity 3 through a rotating rod 7;

[0069] One end of the rotating rod 7 runs through the inner wall of the cavity 3 and is fixedly connected with a knob 8 for driving the rotating rod 7 to rotate, and the bottom of the supporting plate 2 is fixedly connected with a plurality of supporting rods 9 for supporting the supporting pl...

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Abstract

The invention discloses grid current-limiting device and system design. The grid current-limiting device comprises a base and a support plate, wherein the support plate is horizontally disposed abovethe base; a cavity is disposed in the base; a rotating rod is rotatably connected in the cavity; a first gear fixedly sleeves a load-bearing rod; a second gear meshed with the first gear is disposed in the cavity; and the second gear is rotatably connected to the inner wall of the cavity through the rotating rod. The current-limiting system includes a first current-limiting reactor, a first smartswitch, a first contactor, a second current-limiting reactor, a second smart switch, a second contactor, a controller, a voltage transformer, and a current transformer. The grid current-limiting device is convenient to install through the arrangement of a plurality of adjusting mechanisms, thereby improving the installation efficiency of the grid current-limiting device. Thus, the device can achieve the current-limiting monitoring of the power grid, thereby increasing the current-limiting effect of the current-limiting device.

Description

technical field [0001] The invention relates to the technical field of power grid current limiting, in particular to a power grid current limiting device and system design. Background technique [0002] Due to the development of the power grid, the maximum short-circuit current of the power grid in many areas exceeds the breaking capacity of the circuit breaker (currently the maximum is 63kA). Limited by this, a more effective short-circuit current breaking technology is required. [0003] In the early stage of domestic development, a large-capacity high-speed switch was developed that combined the explosive rapid breaking current-carrying bridge body, high-voltage current-limiting fuse, and high-energy-absorbing zinc oxide resistor. The large-capacity high-speed switch can be broken at the initial stage of short-circuit current rise. And limit its growth. When the short-circuit current reaches about 15% of the peak value, the short-circuit current can be cut off, and the a...

Claims

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Application Information

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IPC IPC(8): H02H9/02
CPCH02H9/021H02H9/025
Inventor 沙志成董霜刘威朱春萍郑帅王艳赵龙郑志杰张杰
Owner 沙志成