CN208971183U - The safe discharge device for preventing DC bus from powering off - Google Patents
The safe discharge device for preventing DC bus from powering off Download PDFInfo
- Publication number
- CN208971183U CN208971183U CN201821593865.3U CN201821593865U CN208971183U CN 208971183 U CN208971183 U CN 208971183U CN 201821593865 U CN201821593865 U CN 201821593865U CN 208971183 U CN208971183 U CN 208971183U
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- Prior art keywords
- bus
- monitor
- fuse
- battery
- powering
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a kind of safe discharge devices for preventing DC bus from powering off.It includes the accumulator cell assembly connecting with DC bus (1), charging assembly (5) and discharge component；Wherein, accumulator cell assembly is that the both ends of battery group (9) are serially connected with the battery fuse (3) being made of anode fuse (31) and battery cathode fuse (32), the switch (6) and discharge load (8) that discharge component is connect by control terminal with the output end of monitor (7) compose in series, the diode (2) and current sensor (4) of concatenation are connected in parallel in the both ends of the anode fuse (31) of off-state, the cathode of diode (2) therein is connect with DC bus (1), the output end of current sensor (4) is connect with monitor (7), for when monitor (7) knows that current sensor (4) has output signal, shutdown switch (6).It can prevent the power-off of DC bus during proof discharge.
Description
Technical field
The utility model relates to a kind of safe discharge device, especially a kind of safe-discharge dress for preventing DC bus from powering off
It sets.
Background technique
Electric system accumulator direct current supply includes battery, charging unit and PC monitor unit for monitoring and controlling, it is power plant, becomes
The operation of power station indispensability and control power supply, while standby working power when being also forced outage.Battery is battery direct current
The energy storage device of power supply, especially in the case where forced outage, battery plays in terms of the operation for ensureing power plant, substation
Extremely important effect, the main object ensured is protection and control equipment in station, such as high-voltage circuitbreaker, comprehensive guarantors dress
It sets, backup auto-activating device, emergency bearing oil pump etc..For this purpose, country is in " electric system accumulator direct current supply device operation and maintenance skill
Art regulation (DLT724-2000) " in be distinctly claimed " in power plant or electric substation only have a group storage battery, cannot be out of service,
It cannot make full proof discharge ".However, in 110kV and the accumulator direct current supply of following level substation, universal at present
Configure a group storage battery.When substation carries out the maintenance of accumulator direct current supply, need to carry out capacity to battery therein
Proof discharge, it is common practice to battery is detached from after DC bus and discharged through discharge component, by charging unit to direct current
Bussed supply.In this way, once exchange power loss or charging unit break down, after DC bus power loss, it will directly result in protection
With the tripping or malfunction of control equipment, the normal operation of substation, or even damage equipment are influenced, the power failure thing of large area is caused
Therefore.
Utility model content
The technical problems to be solved in the utility model in order to overcome the shortcomings in the prior art place, a kind of pair of battery is provided
Carry out the safe discharge device for preventing DC bus from powering off when capacity proof discharge.
The technical issues of to solve the utility model, used technical solution are the safety for preventing DC bus from powering off
Electric discharge device includes the accumulator DC being made of accumulator cell assembly, charging assembly and monitor being electrically connected with DC bus
Source block, and the discharge component of electrical connection monitor, especially:
The accumulator cell assembly is that the both ends of battery group are serially connected with battery fuse, the battery fuse by battery just
Pole fuse and battery cathode fuse composition, anode fuse therein are in off-state；
The discharge component is composed in series by switch and discharge load, one end and anode fuse and battery group
Contact electrical connection, the other end be electrically connected with the contact of battery cathode fuse and DC bus, the control terminal of the switch and
The output end of monitor is electrically connected；
The both ends of the anode fuse in off-state are connected in parallel to the diode and current sense of concatenation
Device, wherein the cathode of diode is electrically connected with DC bus, and the output end of current sensor is electrically connected with monitor, for working as
When monitor knows that current sensor has output signal, shutdown switch.
Further improvement as the safe discharge device for preventing DC bus from powering off:
Preferably, it switchs as mechanical contact switch or electronic non-contact switch.
Preferably, monitor is comparator or single-chip microcontroller or digital signal processor or microcomputer.
Preferably, current sensor is current divider or electronic current mutual inductor or fibre optic current sensor.
Beneficial effect compared with the existing technology is:
With such a structure, during carrying out proof discharge to battery, when battery is detached from direct current mother
Line, i.e. anode fuse are in after off-state, and when AC power source is normal, DC bus is directly supplied by charging assembly
Electricity --- output voltage when being operated normally due to charging assembly is higher than the end voltage of the battery in electric discharge, and is based on two poles
The unilateal conduction characteristic of pipe prevents battery from discharging DC bus, and charging assembly can not charge to battery and (ensure that
The metering accuracy of proof discharge)；Once the voltage of DC bus is lower than the voltage of battery, battery will pass through two poles
For pipe automatically to DC bus powered, monitor can be turned off switch by the output of current sensor also to avoid storage battery energy
It is lost, to prevent the power-off of DC bus, it is ensured that the safe operation of DC power supply has prevented substation's large-area power-cuts
A possibility that accident occurs；And then make the utility model be extremely easy to widely commercial applications in 110kV and following level power transformation
The electric system stood is in accumulator direct current supply device, to carry out the safe-discharge of verification property to battery therein.
Detailed description of the invention
Fig. 1 is a kind of basic structure schematic diagram of the utility model.
Specific embodiment
The preferred embodiment of the utility model is described in further detail with reference to the accompanying drawing.
Referring to Fig. 1, the composition for the safe discharge device for preventing DC bus from powering off is as follows:
The accumulator DC being made of accumulator cell assembly, charging assembly 5 and monitor 7 is electrically connected on DC bus 1
Source block and discharge component.Wherein:
Accumulator cell assembly is that the both ends of battery group 9 are serially connected with battery fuse 3, and the battery fuse 3 is by anode
Fuse 31 and battery cathode fuse 32 form, and anode fuse 31 therein is in off-state.
Discharge component is composed in series by switch 6 and discharge load 8, one end and anode fuse 31 and battery group
9 contact is electrically connected, the other end is electrically connected with the contact of battery cathode fuse 32 and DC bus 1；The control of switch 6 therein
End processed is electrically connected with the output end of monitor 7, and switch 6 is mechanical contact switch (or electronic non-contact switch), monitor 7
For comparator (or single-chip microcontroller or digital signal processor or microcomputer).
The both ends of the above-mentioned anode fuse 31 in off-state are connected in parallel to the diode 2 and electric current of concatenation
The cathode of sensor 4, diode 2 therein is electrically connected with DC bus 1, and output end and the monitor 7 of current sensor 4 are electrically connected
It connects, current sensor 4 is current divider (or electronic current mutual inductor or fibre optic current sensor).
The electric parameter of aforementioned each component is applied to voltage class in electric system by it and required capacity determines.
The utility model is in the process for carrying out proof discharge with the battery in accumulator direct current supply to electric system
In, when AC power source is normal, under the monitoring of monitor 7, charging assembly 5 provides DC voltage, battery to DC bus 1
Group 9 carries out proof discharge through 6 pairs of discharge loads 8 of battery cathode fuse 32 and the switch of closure；When AC power source power loss or
When charging assembly 5 breaks down, the voltage on DC bus 1 will be less than the voltage of battery group 9, and battery group 9 at this time is just
It can automatically power through diode 2 and current sensor 4 to DC bus 1, monitor 7 knows the output letter of current sensor 4
After number, switch 6 can be immediately turned off to stop the electric discharge to battery group 9, to ensure the power supply to DC bus 1.
Obviously, those skilled in the art can be to the safe discharge device for preventing DC bus from powering off of the utility model
Various modification and variations are carried out without departing from the spirit and scope of the utility model.If in this way, these to the utility model
Modifications and variations belong to the scope of the claims of the present invention and its equivalent technology, then the utility model is also intended to encompass
Including these modification and variations.
Claims (7)
1. a kind of safe discharge device for preventing DC bus from powering off, including being electrically connected with DC bus (1) by battery group
The accumulator direct current supply component of part, charging assembly (5) and monitor (7) composition, and the discharge part of electrical connection monitor (7)
Part, it is characterised in that:
The accumulator cell assembly be battery group (9) both ends be serially connected with battery fuse (3), the battery fuse (3) by
Anode fuse (31) and battery cathode fuse (32) composition, anode fuse (31) therein is in disconnection shape
State；
The discharge component is composed in series by switching (6) and discharge load (8), one end and anode fuse (31) and storage
The contact electrical connection of battery pack (9), the other end are electrically connected with the contact of battery cathode fuse (32) and DC bus (1), institute
The control terminal for stating switch (6) is electrically connected with the output end of monitor (7)；
The both ends of the anode fuse (31) in off-state are connected in parallel to the diode (2) of concatenation and electric current passes
Sensor (4), wherein the cathode of diode (2) is electrically connected with DC bus (1), the output end and monitor of current sensor (4)
(7) it is electrically connected, for when monitor (7) knows that current sensor (4) has output signal, shutdown to switch (6).
2. the safe discharge device according to claim 1 for preventing DC bus from powering off, it is characterized in that switch (6) is machinery
Formula contact switch or electronic non-contact switch.
3. it is according to claim 1 prevent DC bus power off safe discharge device, it is characterized in that monitor (7) be than
Compared with device.
4. the safe discharge device according to claim 1 for preventing DC bus from powering off, it is characterized in that monitor (7) is single
Piece machine.
5. the safe discharge device according to claim 1 for preventing DC bus from powering off, it is characterized in that monitor (7) is number
Word signal processor.
6. the safe discharge device according to claim 1 for preventing DC bus from powering off, it is characterized in that monitor (7) is micro-
Type computer.
7. the safe discharge device according to claim 1 for preventing DC bus from powering off, it is characterized in that current sensor (4)
For current divider or electronic current mutual inductor or fibre optic current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593865.3U CN208971183U (en) | 2018-09-28 | 2018-09-28 | The safe discharge device for preventing DC bus from powering off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593865.3U CN208971183U (en) | 2018-09-28 | 2018-09-28 | The safe discharge device for preventing DC bus from powering off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971183U true CN208971183U (en) | 2019-06-11 |
Family
ID=66757791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821593865.3U Active CN208971183U (en) | 2018-09-28 | 2018-09-28 | The safe discharge device for preventing DC bus from powering off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994721A (en) * | 2019-12-06 | 2020-04-10 | 盖士炎 | Transformer substation direct current system storage battery pack checking discharge circuit |
-
2018
- 2018-09-28 CN CN201821593865.3U patent/CN208971183U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994721A (en) * | 2019-12-06 | 2020-04-10 | 盖士炎 | Transformer substation direct current system storage battery pack checking discharge circuit |
| CN110994721B (en) * | 2019-12-06 | 2021-08-13 | 盖士炎 | Transformer substation direct current system storage battery pack checking discharge circuit |
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