CN210517892U - DC standby power supply device of transformer substation protection device - Google Patents
DC standby power supply device of transformer substation protection device Download PDFInfo
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- CN210517892U CN210517892U CN201921903784.3U CN201921903784U CN210517892U CN 210517892 U CN210517892 U CN 210517892U CN 201921903784 U CN201921903784 U CN 201921903784U CN 210517892 U CN210517892 U CN 210517892U
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- power supply
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- standby power
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- protection device
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- 238000002955 isolation Methods 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 105
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Abstract
The utility model relates to a protection device power technical field of transformer substation is a protection device's of transformer substation direct current stand-by power supply device, and it includes isolation relay, dual power supply switching unit, stand-by power supply capacity detecting element, isolation relay coil is connected with dual power supply switching unit electricity, and isolation relay normally open contact is connected with stand-by power supply unit electricity, and stand-by power supply unit is connected with dual power supply switching unit electricity, and stand-by power supply capacity detecting element connects in parallel at stand-by power supply unit's both ends. The utility model discloses simple structure, wiring are simple, convenient to use, can pass through the stand-by power supply unit when the main power supply trouble and supply power to protection device, guarantee that protection device lasts reliable action to realize the reliable tripping operation of circuit breaker, correctly record the message and in time send fault information on, maintain the electric wire netting and move reliably.
Description
Technical Field
The utility model relates to a protection device power technical field of transformer substation is a protection device's of transformer substation direct current stand-by power supply device.
Background
The direct current system is a power source of a protection device of a transformer substation, is an important component of the transformer substation, and when the direct current system breaks down, the protection device of the transformer substation is prone to failure, override trip and the like. For example, in the event of 618 of 330kV transformer substation in southeast rural area in southeast Ann, the voltage of the whole station of 330kV transformer substation in southeast suburb is lost and the transformer is burnt out due to the fact that the direct current system is transformed and the battery insurance is not recovered. Therefore, when the direct current system of the transformer substation fails, not only the protection device cannot operate correctly, but also the current fault information cannot be stored and uploaded to the dispatching device, and the fault information cannot be judged timely and effectively.
At present, a single set of storage battery is adopted in the configuration of a direct current system of a 110kV transformer substation, when the conditions of non-installation of storage battery insurance, overlarge internal resistance of the direct current storage battery, unreliable connection and the like occur, the direct current system is easy to open during output in the actual discharging process, and faults occur, so that the transformer substation protection device is easy to have the conditions of refusal, override trip and the like.
Disclosure of Invention
The utility model provides a protection device's of transformer substation direct current stand-by power supply device has overcome above-mentioned prior art not enough, and it can effectively solve when the main power source that current transformer substation direct current system who adopts single set battery exists breaks down, does not have stand-by power supply, easily causes the problem of the protection device of transformer substation the condition such as refusing to move, tripping operation more than grade appears.
The technical scheme of the utility model is realized through following measure: the utility model provides a protection device's of transformer substation direct current stand-by power supply device, includes isolation relay, dual power supply switching unit, stand-by power supply capacity detecting element, isolation relay coil is connected with dual power supply switching unit electricity, and isolation relay normally open contact is connected with stand-by power supply unit electricity, and stand-by power supply unit is connected with dual power supply switching unit electricity, and stand-by power supply capacity detecting element connects in parallel at stand-by power supply unit's both ends.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the standby power supply capacity detection unit comprises a voltage detection module, a capacity detection relay, a manual capacity detection switch, a high-power load and a detection display module, wherein the manual capacity detection switch is electrically connected with a capacity detection relay coil, a standby power supply unit, a capacity detection relay normally open contact and the voltage detection module are sequentially connected in series, the voltage detection module is respectively electrically connected with the detection display module and the high-power load, and the capacity detection relay normally closed contact is respectively and electrically connected between the isolation relay normally open contact and the standby power supply unit and between the standby power supply unit and a dual-power switching unit.
The standby power supply capacity detection unit further comprises a time relay, a detection display module and a high-power load, the normally closed contact of the time relay is electrically connected between the normally open contact of the isolation relay and the standby power supply unit and between the standby power supply unit and the dual-power switching unit respectively, the standby power supply unit, the normally open contact of the capacity detection relay and the voltage detection module are connected in series according to the sequence, and the voltage detection module is electrically connected with the detection display module and the high-power load respectively.
The standby power supply unit comprises a charging module and a super capacitor, and the charging module is electrically connected with the super capacitor.
The capacitor charging device further comprises an insulating shell, wherein the insulating shell is provided with an isolating relay, a charging module, a super capacitor, a double-power-supply switching unit, a voltage detection module, a capacity detection relay, a time relay and a high-power load, and the manual capacity detection switch and the detection display module are arranged on the insulating shell.
The insulation shell is further provided with a direct current input interface, a direct current output interface and a remote signal interface, the direct current input interface is electrically connected with the isolation relay, the direct current output interface is electrically connected with the double power supply switching unit, and the remote signal interface is electrically connected with the capacity detection relay coil.
The insulating shell is also provided with a main power supply indicating lamp capable of indicating the working state of the main power supply and a standby power supply indicating lamp group capable of indicating the charging and discharging working state of the standby power supply unit.
The utility model discloses simple structure, wiring are simple, convenient to use, can pass through the stand-by power supply unit when the main power supply trouble and supply power to protection device, guarantee that protection device lasts reliable action to realize the reliable tripping operation of circuit breaker, correctly record the message and in time send fault information on, maintain the electric wire netting and move reliably.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Fig. 2 is the utility model discloses can manually carry out the circuit structure schematic diagram that stand-by power supply unit capacity detected.
Fig. 3 is the utility model discloses can carry out the circuit structure schematic diagram that stand-by power supply unit capacity detected automatically.
Fig. 4 is a schematic front side three-dimensional structure of the insulating housing of the present invention.
Fig. 5 is a schematic diagram of a rear side three-dimensional structure of the insulating housing of the present invention.
The codes in the figures are respectively: KM1 is isolation relay coil, KM11 is isolation relay normally open contact, KM2 is capacity detection relay coil, KM21 is capacity detection relay normally closed contact, KM22 is capacity detection relay normally open contact, KM3 is time relay coil, KM31 is time relay normally closed contact, KM32 is time relay normally closed contact, 1 is insulating housing, 2 is the main power source pilot lamp, 3 is stand-by power source pilot lamp group, 4 is manual capacity detection switch, 5 is for detecting display module, 6 is the direct current input interface, 7 is the direct current output interface, 8 is the remote signal interface.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout pattern of fig. 3 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention will be further described with reference to the following examples and drawings:
as shown in the attached drawing 1, the direct-current standby power supply device of the transformer substation protection device comprises an isolation relay, a dual power supply switching unit, a standby power supply unit and a standby power supply capacity detection unit, wherein an isolation relay coil KM1 is electrically connected with the dual power supply switching unit, an isolation relay normally open contact KM11 is electrically connected with the standby power supply unit, the standby power supply unit is electrically connected with the dual power supply switching unit, and the standby power supply capacity detection unit is connected with two ends of the standby power supply unit in parallel.
The dual power supply switching unit is a conventional known technology, and the type of the dual power supply switching unit can be RUS-32B of south Beijing Australian Deds Electrical Co., Ltd, and is used for switching a main power supply and a standby power supply; the backup power supply capacity detection unit is used for detecting the capacity of the backup power supply unit. The standby power supply unit needs to provide a power supply of the protection device and a circuit breaker to control the power supply to correctly and completely act at least once, and the standby power supply unit normally runs for 10 minutes after the device acts.
The utility model discloses a concrete working process as follows:
the power supply process is as follows:
1. electrically connecting an isolation relay with a main power supply, and electrically connecting a dual-power switching unit with a protection device of a transformer substation;
2. when the main power supply is normal, the dual-power switching unit switches the main power supply to supply power to the protection device;
3. when the main power supply fails, the double-power-supply switching unit immediately disconnects the main power supply, the standby power supply unit is switched to supply power to the protection device, meanwhile, the isolation relay coil KM1 loses power, the isolation relay normally-open contact KM11 is disconnected, the main power supply is cut off, and reverse feeding is prevented.
The capacity detection process of the standby power supply unit comprises the following steps:
1. the standby power supply capacity detection unit disconnects the standby power supply unit from the normally open contact KM1 of the isolation relay and the dual-power switching unit, and isolates the standby power supply unit;
2. the backup power supply capacity detection performs capacity detection on the backup power supply unit.
The utility model discloses simple structure, wiring are simple, convenient to use, can pass through the stand-by power supply unit when the main power supply trouble and supply power to protection device, guarantee that protection device lasts reliable action to realize the reliable tripping operation of circuit breaker, correctly record the message and in time send fault information on, maintain the electric wire netting and move reliably.
The direct-current standby power supply device of the substation protection device can be further optimized or/and improved according to actual needs:
as shown in fig. 1 and 2, the standby power capacity detection unit includes a voltage detection module, a capacity detection relay, a manual capacity detection switch 3, a high-power load, and a detection display module 5, where the manual capacity detection switch 3 is electrically connected to a capacity detection relay coil KM2, the standby power unit, a capacity detection relay normally open contact KM22, and the voltage detection module are sequentially connected in series, the voltage detection module is respectively electrically connected to the detection display module 5 and the high-power load, and the capacity detection relay normally closed contact KM21 is respectively and electrically connected between the isolation relay normally open contact KM11 and the standby power unit, and between the standby power unit and the dual power supply switching unit.
The voltage detection module is a conventional technology, and can be a direct-current voltage relay for detecting the capacity of the standby power supply unit; the detection display module 5 is used for displaying the detection result of the voltage detection module, namely displaying two states of failure detection and detection in progress; the two ends of the manual capacity detection switch 3 are respectively connected with a power supply and a capacity detection relay coil KM2 and used for controlling whether the capacity detection relay coil KM2 is electrified or not, when the capacity detection of the standby power supply unit is needed, the manual capacity detection switch 3 is closed, the capacity detection relay coil KM2 is electrified, the capacity detection relay normally-open contact KM22 is closed, the capacity detection relay normally-closed contact KM21 is disconnected, the standby power supply unit is isolated, the voltage detection module is switched on, and the capacity detection of the standby power supply unit is started.
After the capacity detection of the standby power supply unit is completed, the staff can check whether the standby power supply unit has faults such as unqualified capacity or not through the detection display module 5, and if the faults occur, the staff can timely overhaul or replace the standby power supply unit.
As shown in fig. 1 and 3, the standby power capacity detection unit further includes a time relay, a detection display module 5 and a high-power load, the time relay normally-closed contact KM31 is electrically connected between the isolation relay normally-open contact KM11 and the standby power unit, and between the standby power unit and the dual power supply switching unit, the standby power unit, the capacity detection relay normally-open contact KM32 and the voltage detection module are sequentially connected in series, and the voltage detection module is electrically connected with the detection display module 5 and the high-power load.
The time relay is used for automatic detection of capacitance detection, namely after time relay delay reaches, a time relay coil KM3 is electrified, a time relay normally open contact KM32 is closed, and a time relay normally closed contact KM31 is disconnected, so that a standby power supply unit is isolated, a voltage detection module is switched on, and capacity detection of the standby power supply unit is started.
As shown in fig. 1, 2 and 3, the standby power supply unit includes a charging module and a super capacitor, and the charging module is electrically connected to the super capacitor. The charging module and the super capacitor are both in the prior known technology, and the super capacitor needs to provide a power supply of the protection device and a control power supply of the circuit breaker to correctly and completely act at least once, and normally run for 10 minutes after the device acts.
As shown in fig. 1, 2, 3, 4 and 5, the device further comprises an insulating housing 1, wherein an isolation relay, a charging module, a super capacitor, a dual power switching unit, a voltage detection module, a capacity detection relay, a time relay and a high-power load are all arranged on the inner side of the insulating housing 1, and a manual capacity detection switch 3 and a detection display module 5 are arranged on the insulating housing 1. The detection display module 5 may be a capacity detection indicator light set capable of indicating a capacity detection result.
As shown in fig. 1, 2, 3, 4, and 5, a dc input interface 6, a dc output interface 7, and a remote signal interface 8 are further disposed on the insulating housing 1, the dc input interface 6 is electrically connected to the isolation relay, the dc output interface 7 is electrically connected to the dual power switching unit, and the remote signal interface 8 is electrically connected to the capacity detection relay coil.
The direct current input interface 6 is used for connecting a main power supply, the direct current output interface 7 is used for connecting a protection device, and the remote signal interface 8 is used for scheduling capacity measurement of a remote storage battery and uploading signals. The utility model discloses in set up above-mentioned interface and can simplify the wiring process, make things convenient for the staff to use.
As shown in fig. 1, 2, 3, 4, and 5, a main power indicator light capable of indicating the operating state of the main power and a backup power indicator light group 2 capable of indicating the charging/discharging operating state of the backup power unit are further disposed on the insulating housing 1.
Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.
Claims (7)
1. The utility model provides a protection device's of transformer substation direct current stand-by power supply device which characterized in that, includes isolation relay, dual power supply switching unit, stand-by power supply capacity detecting element, isolation relay coil and dual power supply switching unit electricity are connected, and isolation relay normally open contact is connected with stand-by power supply unit electricity, and stand-by power supply unit is connected with dual power supply switching unit electricity, and stand-by power supply capacity detecting element connects in parallel at stand-by power supply unit's both ends.
2. The direct-current standby power supply device of the substation protection device according to claim 1, wherein the standby power supply capacity detection unit comprises a voltage detection module, a capacity detection relay, a manual capacity detection switch, a high-power load and a detection display module, the manual capacity detection switch is electrically connected with a coil of the capacity detection relay, the standby power supply unit, a normally open contact of the capacity detection relay and the voltage detection module are sequentially connected in series, the voltage detection module is electrically connected with the detection display module and the high-power load respectively, and the normally closed contact of the capacity detection relay is electrically connected between the normally open contact of the isolation relay and the standby power supply unit and between the standby power supply unit and the dual power supply switching unit respectively.
3. The direct-current standby power supply device of the substation protection device according to claim 1, wherein the standby power supply capacity detection unit further comprises a time relay, a detection display module and a high-power load, the normally closed contact of the time relay is electrically connected between the normally open contact of the isolation relay and the standby power supply unit and between the standby power supply unit and the dual power supply switching unit respectively, the standby power supply unit, the normally open contact of the capacity detection relay and the voltage detection module are connected in series in sequence, and the voltage detection module is electrically connected with the detection display module and the high-power load respectively.
4. The direct-current backup power supply device of the substation protection device according to claim 1 or 2 or 3, characterized in that the backup power supply unit comprises a charging module and a super capacitor, the charging module and the super capacitor being electrically connected.
5. The direct-current standby power supply device of the substation protection device according to claim 4, further comprising an insulating housing, wherein the isolation relay, the charging module, the super capacitor, the dual power switching unit, the voltage detection module, the capacity detection relay, the time relay and the high-power load are all arranged inside the insulating housing, and the manual capacity detection switch and the detection display module are arranged on the insulating housing.
6. The direct-current standby power supply device of the substation protection device according to claim 5, wherein a direct-current input interface, a direct-current output interface, and a remote signal interface are further provided on the insulating housing, the direct-current input interface is electrically connected to the isolation relay, the direct-current output interface is electrically connected to the dual power switching unit, and the remote signal interface is electrically connected to the capacity detection relay coil.
7. The direct-current standby power supply device of the substation protection device according to claim 5 or 6, wherein a main power supply indicator lamp capable of indicating the working state of the main power supply and a standby power supply indicator lamp group capable of indicating the charging and discharging working state of the standby power supply unit are further provided on the insulating housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921903784.3U CN210517892U (en) | 2019-11-06 | 2019-11-06 | DC standby power supply device of transformer substation protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921903784.3U CN210517892U (en) | 2019-11-06 | 2019-11-06 | DC standby power supply device of transformer substation protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210517892U true CN210517892U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921903784.3U Active CN210517892U (en) | 2019-11-06 | 2019-11-06 | DC standby power supply device of transformer substation protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210517892U (en) |
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2019
- 2019-11-06 CN CN201921903784.3U patent/CN210517892U/en active Active
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