CN201750182U - Direct current power supply cabinet with voltage-reducing protection function - Google Patents
Direct current power supply cabinet with voltage-reducing protection function Download PDFInfo
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- CN201750182U CN201750182U CN 201020273394 CN201020273394U CN201750182U CN 201750182 U CN201750182 U CN 201750182U CN 201020273394 CN201020273394 CN 201020273394 CN 201020273394 U CN201020273394 U CN 201020273394U CN 201750182 U CN201750182 U CN 201750182U
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Abstract
The utility model discloses a direct current power supply cabinet with a voltage-reducing protection function, which comprises a voltage-reducing control module, wherein the voltage-reducing control module is connected in series between a switching-in power bus and a control bus and further comprises a voltage-reducing silicon chain unit, a voltage-reducing controller and an open circuit protection unit; the voltage-reducing silicon chain unit comprises a plurality of serially-connected voltage-stabilizing tubes; the voltage-reducing controller is connected with a plurality of relays in one-to-one correspondence to the voltage-stabilizing tubes and is used for executing the disconnection or closing of the relays when the voltage is detected to be greater than a set value in the controller, changing the voltage-reducing value of the voltage-reducing silicon chain and ensuring that the voltage value of the control bus is within the specified range; the open circuit protection unit is used for monitoring the state of the voltage-reducing silicon chain unit and immediately acts to execute the shorted connection of the open circuit part of the silicon chain when voltage-reducing silicon chain unit has open circuit faults; and meanwhile, an alarm circuit acts to send a silicon chain open circuit alarm signal. According to the utility model, a voltage-reducing control bus is arranged between a control feed line and the switching-in bus and the voltage of the control bus is adjusted in the normal range.
Description
Technical field
The utility model relates to industrial power control field, is specifically related to a kind of DC power cabinet with step-down defencive function.
Background technology
The non-maintaining DC power supply panel of intelligence is called for short direct current cabinet and is used for supplying this DC power supply.What the electric power operation power supply in power plant and the transformer station adopted now all is DC power supply, and it provides power supply for controlling load and living load and direct current emergency lighting load etc., is the basis of contemporary electric power system control, protection.Direct current cabinet is made up of mating electric unit, charging module unit, DC feedback unit, power monitoring unit, monitoring module unit and insulating monitoring unit.Be mainly used in the middle-size and small-size power plant of electric power system, hydroelectric station, all kinds of transformer station; with other user'ss (as petrochemical industry, mine, railway etc.) who uses DC equipment, be applicable to the occasions such as instrument, instrument, relaying protection and fault illumination in switch divide-shut brake and the secondary circuit.
But the DC power system of prior art, when storage battery is carried out equalizing charge, the output voltage of charging module can be higher than the load voltage value (being generally 220V) of control loop, can cause damage to output voltage and power digital circuit if control loop voltage is higher than 220V, for example burn out problems such as circuit.
Output voltage that so how to guarantee DC power supply is no more than rated voltage, is the technical problem of joint research in the industry.
The utility model content
At above-mentioned defective, the purpose of this utility model provides a kind of DC power cabinet with step-down defencive function, does not have the step-down defencive function with the DC power cabinet that solves prior art, damages the technical problem of system easily.
For achieving the above object, the utility model has adopted following technical scheme:
A kind of DC power cabinet with step-down defencive function comprises a step-down control module, and it is serially connected between combined floodgate power bus and the control bus, and this step-down control module further comprises:
Step-down silicon chain element, it comprises the voltage-stabiliser tube of a plurality of series connection;
Buck controller, connected a plurality of and described voltage-stabiliser tube relay one to one,, carried out the disjunction or the closure of relay in order to when detecting voltage and be higher than set point in the controller, change the step-down value of step-down silicon chain, guarantee to control bus voltage value within the limits prescribed; And
The open-circuit-protection unit, in order to monitor the state of step-down silicon chain element, when step-down silicon chain element generation open fault, action at once, with silicon chain open circuit part short circuit, simultaneously, silicon chain open circuit alarm signal is sent in the warning circuit action.
According to the described DC power cabinet of the utility model preferred embodiment, described open-circuit-protection unit comprises many group lead-in wires, is connected across respectively on the voltage-stabiliser tube of described step-down silicon chain element.
According to the described DC power cabinet of the utility model preferred embodiment, described relay is respectively at described voltage-stabiliser tube parallel connection.
Owing to adopted above technical characterictic, make the utility model than prior art, have following advantage and good effect:
The utility model is provided with step-down control bus between control feeder line and closing bus bar, control the work of step-down silicon chain element in manual or automatic mode, thereby the voltage that guarantees control circuit maintains near the rated voltage; And when a silicon chain element was opened a way, behind the protective circuit automatic fault detection unit, with its short circuit, thereby the voltage that guarantees the control bus was adjusted in normal range (NR).
Description of drawings
Fig. 1 is a block diagram of the present utility model;
Fig. 2 is the schematic diagram of step-down control module of the present utility model.
Embodiment
For ease of understanding,, preferred embodiment of the present utility model done being described in further detail below in conjunction with accompanying drawing.
Please refer to Fig. 1; it is a kind of system block diagram with a kind of embodiment of DC power cabinet of step-down defencive function of the utility model; as seen; it comprises the system monitoring unit; a plurality of charging modules, and batteries also comprise a step-down control module; it is serially connected between combined floodgate power bus and the control bus, is used for guaranteeing that the magnitude of voltage of controlling bus is no more than the rated voltage that also is not less than 220V.
Please further with reference to figure 2, Fig. 2 is the realization schematic diagram of step-down control module in the utility model, and the step-down control module further comprises:
Step-down silicon chain element, it comprises the voltage-stabiliser tube of a plurality of series connection, these voltage-stabiliser tubes are the buck diode that silicon is made, and when electric current passes through voltage-stabiliser tube, can produce corresponding pressure drop, a plurality of voltage-stabiliser tubes series connection, the pressure drop that can produce controlled range.
Buck controller, connected a plurality of and described voltage-stabiliser tube relay one to one, its inside is provided with control circuit, constantly detect the voltage of control bus, when detecting voltage and be higher than set point in the controller, part relay (K1, K2, K3, K4, K5 all or part of) cuts out, thereby make the voltage-stabiliser tube conducting in parallel respectively, the purpose of realization step-down with these relays.When detecting brownout, then with the part relay closes, change the step-down value of step-down silicon chain, reduce the pressure drop of voltage-stabiliser tube, guarantee to control bus voltage value within the limits prescribed; And
The open-circuit-protection unit comprises many group lead-in wires, is connected across respectively on the voltage-stabiliser tube of described step-down silicon chain element.It has anti-function of open and shock resistance function.
The open-circuit-protection unit is in order to monitor the state of step-down silicon chain element, when step-down silicon chain element generation open fault; discern the funny face open circuit part in the step-down silicon chain element rapidly; action at once with silicon chain open circuit part short circuit, can guarantee that then remaining silicon chain part works on.
Simultaneously, silicon chain open circuit alarm signal is sent in the warning circuit action, reminds the attendant in time to change voltage-stabiliser tube, to recover the operate as normal of step-down silicon chain element.
In sum,, make the utility model, have following advantage and good effect than prior art owing to adopted above technical characterictic:
The utility model is provided with step-down control bus between control feeder line and closing bus bar, control the work of step-down silicon chain element in manual or automatic mode, thereby the voltage that guarantees control circuit maintains near the rated voltage; And when a silicon chain element was opened a way, behind the protective circuit automatic fault detection unit, with its short circuit, thereby the voltage that guarantees the control bus was adjusted in striving the product scope.
More than disclosed only be preferred embodiment of the present utility model; but be not to be used for limiting itself; anyly have the knack of those skilled in the art, change and change, all should drop in the protection range of the present utility model in the equalization of under the situation of the utility model spiritual connotation, being done.
Claims (3)
1. the DC power cabinet with step-down defencive function is characterized in that, comprises a step-down control module, and it is serially connected between combined floodgate power bus and the control bus, and this step-down control bus further comprises:
Step-down silicon chain element, it comprises the voltage-stabiliser tube of a plurality of series connection;
Buck controller, connected a plurality of and described voltage-stabiliser tube relay one to one,, carried out the disjunction or the closure of relay in order to when detecting voltage and be higher than set point in the controller, change the step-down value of step-down silicon chain, guarantee to control bus voltage value within the limits prescribed; And
The open-circuit-protection unit, in order to monitor the state of step-down silicon chain element, when step-down silicon chain element generation open fault, action at once, with silicon chain open circuit part short circuit, simultaneously, silicon chain open circuit alarm signal is sent in the warning circuit action.
2. DC power cabinet as claimed in claim 1 is characterized in that, described open-circuit-protection unit comprises many group lead-in wires, is connected across respectively on the voltage-stabiliser tube of described step-down silicon chain element.
3. DC power cabinet as claimed in claim 1 is characterized in that, described relay is respectively at described voltage-stabiliser tube parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020273394 CN201750182U (en) | 2010-07-27 | 2010-07-27 | Direct current power supply cabinet with voltage-reducing protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020273394 CN201750182U (en) | 2010-07-27 | 2010-07-27 | Direct current power supply cabinet with voltage-reducing protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201750182U true CN201750182U (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020273394 Expired - Fee Related CN201750182U (en) | 2010-07-27 | 2010-07-27 | Direct current power supply cabinet with voltage-reducing protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201750182U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989742A (en) * | 2009-08-04 | 2011-03-23 | 汤征宁 | No-load protection circuit for capacitor step-down |
| CN106849027A (en) * | 2016-12-27 | 2017-06-13 | 酒泉钢铁(集团)有限责任公司 | A kind of hotline maintenance method of straight-flow system regulator |
-
2010
- 2010-07-27 CN CN 201020273394 patent/CN201750182U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989742A (en) * | 2009-08-04 | 2011-03-23 | 汤征宁 | No-load protection circuit for capacitor step-down |
| CN106849027A (en) * | 2016-12-27 | 2017-06-13 | 酒泉钢铁(集团)有限责任公司 | A kind of hotline maintenance method of straight-flow system regulator |
| CN106849027B (en) * | 2016-12-27 | 2019-06-25 | 酒泉钢铁(集团)有限责任公司 | A kind of hotline maintenance method of direct current system regulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20150727 |
|
| EXPY | Termination of patent right or utility model |