CN210517770U - Fire-proof equipment of transformer neutral point direct current magnetic biasing suppression device - Google Patents
Fire-proof equipment of transformer neutral point direct current magnetic biasing suppression device Download PDFInfo
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- CN210517770U CN210517770U CN201921015780.1U CN201921015780U CN210517770U CN 210517770 U CN210517770 U CN 210517770U CN 201921015780 U CN201921015780 U CN 201921015780U CN 210517770 U CN210517770 U CN 210517770U
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 24
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- 230000002411 adverse Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 206010000369 Accident Diseases 0.000 description 1
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Abstract
The utility model discloses a fire-proof equipment of transformer neutral point DC magnetic biasing suppression device, the equipment includes fire detector and signal extension device, the fire detector is installed at the top of DC magnetic biasing suppression device container, the fire detector and the signal extension device are electrically connected through respective wiring terminal, the signal extension device is electrically connected through its wiring terminal and grounding switch control box and fling-cut switch; the device can effectively prevent the transformer from losing neutral point grounding after the transformer neutral point direct current magnetic biasing suppression device is in fault fire, and simultaneously prevent the problem that the direct current magnetic biasing suppression device cannot be effectively isolated from occurring, thereby avoiding further expansion of power grid accidents.
Description
Technical Field
The utility model relates to a firebreak device specifically is a fire prevention equipment of transformer neutral point direct current magnetic biasing suppression device, belongs to power transmission and transformation power device and maintains technical field.
Background
The phenomenon that direct current components appear in magnetomotive force and magnetic flux of a large-scale transformer of a converter station or a transformer substation of a capacitive neutral point direct current magnetic bias suppression device or a resistive neutral point direct current magnetic bias suppression device adopted at home and abroad is called direct current magnetic bias, and the phenomenon can generate adverse effect on the normal operation of the transformer and cause the problems of loss increase, local overheating, insulation aging and the like. In recent years, with the increasing running number of direct current converter stations, the application range of direct current magnetic bias suppression devices in converter stations and substations near grounding electrodes is wider and wider, but no device is provided for automatically isolating the direct current magnetic bias suppression devices and preventing the further expansion of fire after fire occurs; the existing processing method mainly depends on the modes of manual control of the grounding knife switch by maintainers, manual separation of a fling-cut switch and the like to process fire accidents.
The device effectively inhibits the direct current magnetic bias of the transformer, and simultaneously carries the risk that the neutral point of the transformer loses grounding and an electrical fire can not be timely extinguished after the direct current magnetic bias inhibiting device fails. Especially, when the dc magnetic bias suppression device has a fault in the control loop of the bypass switch or the switch itself, and a huge unbalanced current flows through the dc magnetic bias suppression device, an electrical fire is easily caused, and if the neutral point of the transformer is not directly grounded and the dc magnetic bias suppression device is isolated in time, the transformer loses the grounding of the neutral point, and the fire of the dc magnetic bias suppression device cannot be extinguished.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a transformer neutral point direct current magnetic biasing suppression device's fire-proof equipment, this fire-proof equipment can prevent effectively that transformer neutral point direct current magnetic biasing suppression device trouble from being fired after, transformer neutral point loses the problem emergence that ground connection direct current magnetic biasing suppression device can not effectively be kept apart simultaneously, avoids the electric wire netting accident to further enlarge.
To the problem that prior art exists, the utility model discloses the technical scheme who takes is: the fire protection equipment of the transformer neutral point direct-current magnetic bias suppression device comprises a fire detector and a signal expansion device, wherein the fire detector is installed at the top of a container of the direct-current magnetic bias suppression device, the fire detector and the signal expansion device are electrically connected through respective wiring terminals, and the signal expansion device is electrically connected with a grounding knife switch control box and a fling-cut switch through the wiring terminals.
Furthermore, the number of the fire detectors is more than 2, and the fire detectors are electrically connected and symmetrically distributed on the top of the container of the direct current magnetic bias suppression device.
Furthermore, the fire detector is a photosensitive detector, and the photosensitive detector is connected in parallel to a 24V direct-current power supply.
Further, the photosensitive detector is one of an ultraviolet flame detector, an infrared flame detector or an ultraviolet-infrared composite flame detector.
Furthermore, a first normally open node of the signal expansion device is electrically connected with the grounding disconnecting link, and a second normally open contact of the signal expansion device is electrically connected with the fling-cut switch.
Furthermore, the number of the signal expansion devices is the same as that of the fire detectors, and the signal expansion devices are connected to a 110V direct-current power supply in parallel.
The utility model has the advantages that: through the combination of the fire detection part and the fire linkage part, a switch-on grounding knife switch instruction can be output instantly after a fire occurs, the transformer is prevented from losing neutral point grounding, the fire linkage part immediately outputs a separate switching switch instruction after the neutral point grounding, a direct-current magnetic bias suppression device with the fire is isolated, artificial misoperation is reduced, the fire extinguishing efficiency is improved, accident deterioration is avoided, current combustion supporting is reduced, and safety conditions are created for fire extinguishment and maintenance of firemen and maintainers; the occurrence of fire action can be efficiently captured by configuring two or more fire detectors, and the adverse effects caused by misoperation and failure of components in the transformer are effectively prevented;
drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the fire detector and the signal expansion device of the present invention after they are connected;
fig. 3 is a schematic diagram of the connection between the signal expansion device and the ground gate and the fling-cut switch.
In the figure: 1-a fire detector; 2-signal expansion means; 21-a first normally open node; 22-second normally open node.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As can be seen from fig. 1, 2 and 3, the fire protection device comprises a fire detector 1 and a signal expansion device 2, wherein the fire detector 1 is installed on the top of a container of the dc magnetic biasing suppression device, and the fire detector 1 and the signal expansion device 2 are electrically connected through respective connection terminals; the first normally open node 21 arranged in the signal expansion device 2 wiring terminal is electrically connected with the grounding switch, and the second normally open contact 22 arranged in the signal expansion device 2 wiring terminal is electrically connected with the fling-cut switch.
The ultraviolet fire detector 1 adopts a GS9208/UV type ultraviolet flame detector, the rated voltage is DC24V, the visual angle range is 120 degrees, an output signal interface meeting various industrial standards can be provided, and the ultraviolet fire detector can be matched with control hosts of various other brands for use; the number of the ultraviolet flame detectors 1 is 4, and the 4 ultraviolet fire detectors 1 are symmetrically distributed and fixedly arranged on the top of the container of the direct current magnetic bias suppression device; the ultraviolet fire detector 1 is connected in parallel to a 24V direct current power supply through a transformer.
The signal expansion device 2 adopts a VM-120 type intelligent signal expansion device of a licensed relay electric company, the signal expansion device 2 and the fire detector 1 are matched for use, the number of the signal expansion devices is 4, and the signal expansion devices are connected to a 110V direct-current power supply in parallel.
The working process of the fire-proof equipment of the transformer neutral point direct-current magnetic bias suppression device is as follows: four ultraviolet fire detector 1 that are located four angles at direct current magnetic biasing suppression device container top detect the owner equipment fire state in the container, and its detection range can cover whole container owner equipment, after fire detector 1 detected the fire disaster, its normally open contact was closed, fire detector 1 sends the contact signal, gives signal extension device 2 with it one-to-one through 24V signal of telecommunication conveying. The first normally open contacts 21 and the second normally open contacts 22 of the four signal expansion devices 2 are used in parallel, when any ultraviolet detector 1 detects a fire signal, the first normally open contacts 21 are closed, the signal expansion devices 2 send 110V electric signals to the grounding disconnecting link control box, a grounding disconnecting link closing contactor control loop executes a switching-on operation, and a grounding disconnecting link is closed immediately; after the second normally open contact 22 is closed and a grounding switch closing contact signal is connected in series, the signal expansion device 2 sends a 110V electric signal to switch on a switching switch opening contactor control loop and separate a switching switch, so that a direct current magnetic bias suppression device in a fire disaster is isolated from a main power grid, a fire prevention strategy is realized, and a fire fighter can rapidly deal with the fire disaster and a maintainer can maintain power grid equipment.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the principles and spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. The utility model provides a transformer neutral point direct current magnetic biasing suppression device's fire prevention equipment which characterized in that: the fire detector is installed at the top of a container of the direct-current magnetic bias suppression device, the fire detector is electrically connected with the signal expansion device through respective wiring terminals, and the signal expansion device is electrically connected with the grounding switch control box and the fling-cut switch through the wiring terminals.
2. The fire protection device of the transformer neutral point direct current magnetic bias suppression device according to claim 1, wherein: the number of the fire detectors is more than 2, and the fire detectors are electrically connected and symmetrically distributed on the top of the container of the direct current magnetic bias suppression device.
3. The fire protection device of a transformer neutral point dc magnetic bias suppression device according to claim 2, wherein: the fire detector is a photosensitive detector, and the photosensitive detector is connected in parallel to a 24V direct-current power supply.
4. The fire protection device of the transformer neutral point direct current magnetic bias suppression device according to claim 3, wherein: the photosensitive detector is one of an ultraviolet flame detector, an infrared flame detector or an ultraviolet-infrared composite flame detector.
5. The fire protection device of a transformer neutral point dc magnetic bias suppression device according to claim 1, wherein: the first normally open node of the signal expansion device is electrically connected with the grounding disconnecting link, and the second normally open contact of the signal expansion device is electrically connected with the fling-cut switch.
6. The fire protection device of a transformer neutral point dc magnetic bias suppression device according to claim 3, wherein: the number of the signal expansion devices is the same as that of the fire detectors, and the signal expansion devices are connected to a 110V direct-current power supply in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015780.1U CN210517770U (en) | 2019-07-02 | 2019-07-02 | Fire-proof equipment of transformer neutral point direct current magnetic biasing suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015780.1U CN210517770U (en) | 2019-07-02 | 2019-07-02 | Fire-proof equipment of transformer neutral point direct current magnetic biasing suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210517770U true CN210517770U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015780.1U Active CN210517770U (en) | 2019-07-02 | 2019-07-02 | Fire-proof equipment of transformer neutral point direct current magnetic biasing suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210517770U (en) |
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2019
- 2019-07-02 CN CN201921015780.1U patent/CN210517770U/en active Active
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