CN207977776U - A kind of DC power cabinet - Google Patents
A kind of DC power cabinet Download PDFInfo
- Publication number
- CN207977776U CN207977776U CN201820455948.XU CN201820455948U CN207977776U CN 207977776 U CN207977776 U CN 207977776U CN 201820455948 U CN201820455948 U CN 201820455948U CN 207977776 U CN207977776 U CN 207977776U
- Authority
- CN
- China
- Prior art keywords
- accumulator
- voltage
- output end
- power cabinet
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of DC power cabinets, including cabinet and the rectification module being set in cabinet, closing bus bar, voltage reduction module, accumulator, voltage transformation module and monitoring module, the input terminal of rectification module is electrically connected with exchanging, the output end of rectification module is connected with closing bus bar and accumulator respectively, closing bus bar is connected by voltage reduction module with control bus, accumulator is connected through voltage transformation module with control bus, and control bus exports DC voltage；Voltage transformation module includes the alternating voltage sampler being sequentially connected, the first controller, DC/DC converters and output filter, alternating voltage sampler is connected with the arbitrary two-phase of alternating current, output filter is connected with control bus, and the input terminal of DC/DC converters is also connected through electromagnetic interface filter with accumulator.The utility model is simple in structure, has the characteristics that regulation precision is high, output noise is small, can improve the precision of voltage regulation and service life of DC power cabinet, ensures that DC power cabinet safely and reliably works for a long time.
Description
Technical field
The utility model is related to power cabinet technical field more particularly to a kind of DC power cabinets.
Background technology
What the electric operation power in power plant and substation largely used is all DC power supply, and DC power cabinet is just
It is for supplying this DC power supply, its compound in order to control and living load and direct current emergency lighting load etc. provide power supply,
It is the basis of contemporary electric power system control and protection.When the principle of DC power cabinet is exchange normal power supply, alternating current is converted
It for direct current, charges a battery, while powering to closing bus bar and control bus；When exchanging dead electricity or failure, accumulator
It powers to closing bus bar and control bus.
DC power cabinet when in use, since the voltage of load is different, it is therefore desirable to which DC power cabinet becomes busbar voltage
Various required voltages are changed into, to meet the needs of different loads.Currently, the power supply conversion efficiency of DC power cabinet is extremely low,
Cause output voltage unstable, influences the normal use of load；In addition, accumulator is a kind of device being easy to loss, electric power storage
The working life in pond generally in 3-5, is influenced by charge/discharge current during the work time, accumulator can be caused to break down,
Backup power supply of the accumulator as Alternating Current Power Supply needs the working condition for monitoring accumulator, prevents to ensure that equipment works normally
There is overvoltage or under-voltage in accumulator, ensures that accumulator steadily provides power supply for load.
Utility model content
The purpose of this utility model is to provide a kind of DC power cabinets, can improve the precision of output voltage, ensure straight
The stabilization of power cabinet bus voltage is flowed, and the voltage value of accumulator can be detected in real time, ensures that storage battery safety reliably works.
To achieve the above object, the utility model adopts the following technical solution：
A kind of DC power cabinet, including cabinet and the rectification module, closing bus bar, voltage reduction module, the storage that are set in cabinet
Battery, voltage transformation module and monitoring module, the input terminal of the rectification module are electrically connected with exchanging, the output end of rectification module
It is connected respectively with closing bus bar and accumulator, rectification module is used to alternating current being converted to direct current, and to accumulator and combined floodgate
Bussed supply, closing bus bar are connected by voltage reduction module with control bus, and accumulator is through voltage transformation module and control bus phase
Even, control bus exports DC voltage, and monitoring module is obtained for being monitored automatically to each position in DC power cabinet
The various operating parameters and state of DC power cabinet；
The voltage transformation module include alternating voltage sampler, the first controller, electromagnetic interface filter, DC/DC converters and
Output filter, alternating voltage sampler are connected with the arbitrary two-phase of alternating current, the output end of alternating voltage sampler and first
Controller is connected, and the output end of the first controller is connected with DC/DC converters, and the input terminal of DC/DC converters is through electromagnetic interface filter
It is connected with accumulator, the output end of DC/DC converters is connected through output filter with control bus.
Preferably, the voltage transformation module further includes sampling feedback device and pulse width modulator, the input of sampling feedback device
End is connected with the output end of output filter, and the output end pulse width modulator of sampling feedback device is connected with DC/DC converters.
Preferably, alternating voltage sampler and sampling feedback device are all made of sampling resistor.
Preferably, the monitoring module includes accumulator checking unit, switching value unit and insulating monitoring unit, is stored
Battery inspection unit stops filling to accumulator when battery tension is excessively high for being detected the voltage of every piece of accumulator
Electricity stops accumulator when battery tension is too low to control bus power supply, and sends out alarm signal；Switching value unit is used
Open circuit or short circuit phenomenon whether occur in DC power cabinet in detecting；Insulating monitoring unit is used for the insulation feelings to DC power cabinet
Condition is monitored.
Preferably, the accumulator checking unit includes multiple digital optocoupler sample circuits, each number optocoupler sampling electricity
Road is all made of non-linear optocoupler, and the anode of non-linear optocoupler is connected through first resistor with the anode of each accumulator, nonlinear optical
The cathode of coupling is connected with the cathode of each accumulator, and the collector of non-linear optocoupler connects positive pole, the hair of non-linear optocoupler
Emitter-base bandgap grading is grounded through second resistance, and the emitter of non-linear optocoupler is also connected with multi-channel analog selecting switch, and multi-channel analog selection is opened
The output end of pass is connected through signal conditioner with AD samplers, and the output end of AD samplers is connected with second controller, accumulator
Input side and outlet side circuit on be both provided with relay, the output end control of second controller connects each relay.
Preferably, the output end of the second controller is additionally provided with audible-visual annunciator.
Preferably, the accumulator checking unit further includes linear optical coupling voltage signal conditioning circuit, linear optical coupling voltage
Signal conditioning circuit uses linear optical coupling, after each accumulator is sequentially connected in series, cathode successively through 3rd resistor and the 4th resistance with
The positive input of linear optical coupling is connected, the 5th resistance eutral grounding of common end of 3rd resistor and the 4th resistance, each accumulator
Anode is connected with the inverting input of linear optical coupling after series connection, and the normal phase input end of linear optical coupling is also through the 6th resistance and linearly
The inverting input of optocoupler is connected, and the both ends of the 6th resistance are parallel with the first zener diode and the first capacitance, linear light successively
The positive output end of coupling is connected through the 7th resistance with the normal phase input end of operational amplifier, and the inverting input of linear optical coupling is through
Eight resistance are connected with the inverting input of operational amplifier, and the inverting input of operational amplifier is also put through the 9th resistance with operation
The output end of big device is connected, the output end of operational amplifier A 1 through the second capacity earth, the output end of operational amplifier A 1 also with
AD samplers are connected.
Preferably, the non-linear optocoupler uses 4N series photoelectrical couplers, and the linear optical coupling is using PC817A series
Photoelectrical coupler.
The utility model uses backup power supply of the accumulator as AC power, female by control when alternating current normal operation
Line is powered for external loading, and when alternating current powers off, the voltage of accumulator is converted to control bus by voltage transformation module
Required voltage simultaneously loads on control bus, and voltage transformation module can adjust output voltage according to the needs of control bus
Value, to make control bus voltages keep constant；Accumulator checking unit is provided on accumulator, accumulator checking unit can
The voltage of every piece of accumulator is detected, stops charging to accumulator when battery tension is excessively high, in battery tension mistake
Stop accumulator when low to power to control bus, and send out alarm signal, accumulator overvoltage or under-voltage operation can be prevented, extended
The service life of accumulator ensures that storage battery safety reliably works.The utility model is simple in structure, can be automatically to direct current
Parameters in the cabinet of source are detected, and need adjustment output voltage values according to load, have regulation precision height, output noise
Small feature can improve the precision of voltage regulation and service life of DC power cabinet, ensure that DC power cabinet is safe and reliable for a long time
Ground works.
Description of the drawings
Fig. 1 is the principles of the present invention block diagram；
Fig. 2 is the functional block diagram of voltage conversion unit described in the utility model；
Fig. 3 is the circuit diagram of accumulator checking module described in the utility model.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described reality
The section Example that example is only the utility model is applied, instead of all the embodiments.Based on the embodiments of the present invention,
Other all embodiments that those of ordinary skill in the art are obtained without making creative work belong to this
The protection domain of utility model.
As shown in Figure 1 to Figure 3, a kind of DC power cabinet described in the utility model, including cabinet and be set in cabinet
Rectification module, closing bus bar, voltage reduction module, accumulator, voltage transformation module and monitoring module, the input terminal of rectification module with
Exchange is electrically connected, and the output end of rectification module is connected with closing bus bar and accumulator respectively, and rectification module is used to turn in alternating current
It is changed to direct current, and is powered to accumulator and closing bus bar, closing bus bar is connected by voltage reduction module with control bus, accumulator
It is connected with control bus through voltage transformation module, control bus exports DC voltage, and monitoring module is used for in DC power cabinet
Each position monitored automatically, obtain the various operating parameters and state of DC power cabinet, realize the complete of DC power cabinet
Automatic management.
Voltage transformation module includes alternating voltage sampler, the first controller, electromagnetic interface filter, DC/DC converters and output
Filter, alternating voltage sampler are connected with the arbitrary two-phase of alternating current, the output end of alternating voltage sampler and the first control
Device is connected, and the output end of the first controller is connected with DC/DC converters, and the input terminal of DC/DC converters is through electromagnetic interface filter and storage
Battery is connected, and the output end of DC/DC converters is connected through output filter with control bus, the output end connection of output filter
There are sampling feedback device, the output end pulse width modulator of sampling feedback device to be connected with DC/DC converters, in the present embodiment, hands over
Galvanic electricity presses sampler and sampling feedback device to be all made of sampling resistor.It is external loading by control bus when alternating current normal operation
Power supply, when alternating voltage samplers sample to alternating current powers off, the first controller controls the work of DC/DC converters, and accumulator is defeated
The voltage gone out is converted to required voltage-drop loading in control bus through electromagnetic interface filter, DC/DC converters and output filter successively
On, sampling resistor acquires the output voltage of output filter, and pulse square wave input DC/DC is generated after pulse width modulator modulation and is become
Parallel operation adjusts output voltage values, to make control bus voltages keep constant by DC/DC converters according to this pulse signal.
Monitoring module includes accumulator checking unit, switching value unit and insulating monitoring unit, accumulator checking list
Member stops charging to accumulator when battery tension is excessively high, in accumulator for being detected the voltage of every piece of accumulator
Stop accumulator when brownout to power to control bus, and sends out alarm signal；Switching value unit is for detecting direct current
Whether open circuit or short circuit phenomenon are occurred in power cabinet；Insulating monitoring unit is for supervising the insulation situation of DC power cabinet
Control.
Accumulator checking unit includes multiple digital optocoupler sample circuits and linear optical coupling voltage signal conditioning circuit, number
Optocoupler sample circuit has multiple, is respectively used to acquire the voltage of every piece of accumulator, linear optical coupling voltage signal conditioning circuit is used for
The sampled result of digital optocoupler sample circuit is modified, the precision of measurement is improved.
Each number optocoupler sample circuit is all made of non-linear optocoupler OC1, and the anode of non-linear optocoupler OC1 is through first resistor
R1 is connected with the anode of each accumulator U0, and the cathode of non-linear optocoupler OC1 is connected with the cathode of each accumulator, nonlinear optical
The emitter of collector connection the positive pole VCC, non-linear optocoupler OC1 of coupling OC1 are grounded through second resistance R2, non-linear optocoupler
The emitter of OC1 is also connected with multi-channel analog selecting switch, and the output end of multi-channel analog selecting switch is through signal conditioner and AD
Sampler is connected, and the output end of AD samplers is connected with second controller, on the input side of accumulator and the circuit of outlet side
It is provided with relay, the output end control of second controller connects each relay, and the output end of second controller is additionally provided with
Audible-visual annunciator, digital optocoupler sample circuit acquire the voltage of each accumulator, when battery tension is excessively high, second controller
The relay for controlling accumulator input side disconnects, and stops charging to accumulator, when the brownout of accumulator, second controller
The relay for controlling accumulator outlet side disconnects, and accumulator stops charging to load, while audible-visual annunciator is alarmed.Nonlinear optical
Coupling OC1 plays the role of isolation and transmission analog voltage signal, flows through the size and accumulator of the current value of non-linear optocoupler OC1
Voltage it is related, the voltage of accumulator, which changes, can cause the light-dependent current in non-linear optocoupler OC1 to change, photosensitive electricity
Stream is voltage by resistance variations, by the voltage that can be obtained each accumulator to the detection of this voltage.
Linear optical coupling voltage signal conditioning circuit use linear optical coupling OC2, after each accumulator U0 is sequentially connected in series, cathode according to
It is secondary to be connected with the positive input of linear optical coupling OC2 through 3rd resistor R3 and the 4th resistance R4,3rd resistor R3 and the 4th resistance
The 5th resistance R5 ground connection of common end of R4, the inverting input of anode and linear optical coupling OC2 after each accumulator U0 series connection
It is connected, the normal phase input end of linear optical coupling OC2 is also connected through the 6th resistance R6 with the inverting input of linear optical coupling OC2, and the 6th
The both ends of resistance R6 are parallel with the positive output end warp of the first zener diode D1 and the first capacitance C1, linear optical coupling OC2 successively
7th resistance R7 is connected with the normal phase input end of operational amplifier A 1, and the inverting input of linear optical coupling OC2 is through the 8th resistance R8
It is connected with the inverting input of operational amplifier A 1, the inverting input of operational amplifier A 1 is also put through the 9th resistance R9 with operation
The output end of big device A1 is connected, and the output end of operational amplifier A 1 is through the second capacitance C2 ground connection, the output end of operational amplifier A 1
Also it is connected with AD samplers.Linear optical coupling OC2 and operational amplifier A 1 can calculate the voltage deviation value of photoelectrical coupler, lead to
It crosses the compensation departure that controller calculates battery tension and utilizes nonlinear optical to obtain accurate battery tension value
Coupling OC1 and linear optical coupling OC2 are combined, and can ensure the precision measured.
In the present embodiment, non-linear optocoupler OC1 uses 4N series photoelectrical couplers, linear optical coupling OC2 to use PC817A
Serial photoelectrical coupler.
The utility model is simple in structure, is used as the backup power supply of AC power by accumulator, when alternating current normal operation,
It is powered for external loading by control bus, when alternating current powers off, is converted to the voltage of accumulator by voltage transformation module
On control bus, voltage transformation module can adjust voltage and load needed for control bus according to the needs of control bus
Output voltage values have the characteristics that regulation precision is high, output noise is small, Neng Gouti to make control bus voltages keep constant
The precision of voltage regulation and service life of high DC power cabinet ensure that DC power cabinet safely and reliably works for a long time.
Claims (8)
1. a kind of DC power cabinet, it is characterised in that：Including cabinet and the rectification module being set in cabinet, closing bus bar, drop
Die block, accumulator, voltage transformation module and monitoring module, the input terminal of the rectification module are electrically connected with exchanging, rectification mould
The output end of block is connected with closing bus bar and accumulator respectively, and rectification module is used to alternating current being converted to direct current, and to storage
Battery and closing bus bar power supply, closing bus bar is connected by voltage reduction module with control bus, accumulator through voltage transformation module and
Control bus is connected, and control bus exports DC voltage, and monitoring module is used to carry out certainly each position in DC power cabinet
Dynamic monitoring, obtains the various operating parameters and state of DC power cabinet；
The voltage transformation module includes alternating voltage sampler, the first controller, electromagnetic interface filter, DC/DC converters and output
Filter, alternating voltage sampler are connected with the arbitrary two-phase of alternating current, the output end of alternating voltage sampler and the first control
Device is connected, and the output end of the first controller is connected with DC/DC converters, and the input terminal of DC/DC converters is through electromagnetic interface filter and storage
Battery is connected, and the output end of DC/DC converters is connected through output filter with control bus.
2. a kind of DC power cabinet as described in claim 1, it is characterised in that：The voltage transformation module further includes that sampling is anti-
Feedback device and pulse width modulator, the input terminal of sampling feedback device are connected with the output end of output filter, the output of sampling feedback device
End pulse width modulator is connected with DC/DC converters.
3. a kind of DC power cabinet as claimed in claim 2, it is characterised in that：Alternating voltage sampler and sampling feedback device are equal
Using sampling resistor.
4. a kind of DC power cabinet as described in claim 1, it is characterised in that：The monitoring module includes accumulator checking list
Member, switching value unit and insulating monitoring unit, accumulator checking unit are used to be detected the voltage of every piece of accumulator,
Stop charging to accumulator when battery tension is excessively high, stops accumulator when battery tension is too low and supplied to control bus
Electricity, and send out alarm signal；Whether switching value unit occurs open circuit or short circuit phenomenon for detecting in DC power cabinet；Absolutely
Edge monitoring unit is for being monitored the insulation situation of DC power cabinet.
5. a kind of DC power cabinet as claimed in claim 4, it is characterised in that：The accumulator checking unit includes multiple numbers
Word optocoupler sample circuit, each number optocoupler sample circuit are all made of non-linear optocoupler, and the anode of non-linear optocoupler is through the first electricity
Resistance is connected with the anode of each accumulator, and the cathode of non-linear optocoupler is connected with the cathode of each accumulator, non-linear optocoupler
Collector connects positive pole, and the emitter of non-linear optocoupler is grounded through second resistance, the emitter of non-linear optocoupler also with it is more
Road analog selection switch is connected, and the output end of multi-channel analog selecting switch is connected through signal conditioner with AD samplers, AD samplings
The output end of device is connected with second controller, is both provided with relay on the input side of accumulator and the circuit of outlet side, and second
The output end control of controller connects each relay.
6. a kind of DC power cabinet as claimed in claim 5, it is characterised in that：The output end of the second controller is also set up
Sound light crossing-signal.
7. a kind of DC power cabinet as claimed in claim 5, it is characterised in that：The accumulator checking unit further includes linear
Optocoupler voltage signal conditioning circuit, linear optical coupling voltage signal conditioning circuit use linear optical coupling, each accumulator to be sequentially connected in series
Afterwards, cathode is connected through 3rd resistor and the 4th resistance with the positive input of linear optical coupling successively, 3rd resistor and the 4th resistance
The 5th resistance eutral grounding of common end, anode is connected with the inverting input of linear optical coupling after the series connection of each accumulator, linearly
The normal phase input end of optocoupler is also connected through the 6th resistance with the inverting input of linear optical coupling, and the both ends of the 6th resistance are in parallel successively
There are the first zener diode and the first capacitance, the positive output end of linear optical coupling defeated through the positive of the 7th resistance and operational amplifier
Enter end to be connected, the inverting input of linear optical coupling is connected through the 8th resistance with the inverting input of operational amplifier, operation amplifier
The inverting input of device is also connected through the 9th resistance with the output end of operational amplifier, and the output end of operational amplifier A 1 is through second
The output end of capacity earth, operational amplifier A 1 is also connected with AD samplers.
8. a kind of DC power cabinet as claimed in claim 7, it is characterised in that：The non-linear optocoupler uses 4N series photoelectricity
Coupler, the linear optical coupling use PC817A series photoelectrical couplers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820455948.XU CN207977776U (en) | 2018-04-03 | 2018-04-03 | A kind of DC power cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820455948.XU CN207977776U (en) | 2018-04-03 | 2018-04-03 | A kind of DC power cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207977776U true CN207977776U (en) | 2018-10-16 |
Family
ID=63763867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820455948.XU Expired - Fee Related CN207977776U (en) | 2018-04-03 | 2018-04-03 | A kind of DC power cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207977776U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177440A1 (en) * | 2019-03-01 | 2020-09-10 | 普联技术有限公司 | Ups circuit, power supply circuit, and electronic device |
| CN114039342A (en) * | 2021-12-03 | 2022-02-11 | 广西电网有限责任公司钦州供电局 | DC equipment inspection device in DC power supply system |
-
2018
- 2018-04-03 CN CN201820455948.XU patent/CN207977776U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177440A1 (en) * | 2019-03-01 | 2020-09-10 | 普联技术有限公司 | Ups circuit, power supply circuit, and electronic device |
| CN114039342A (en) * | 2021-12-03 | 2022-02-11 | 广西电网有限责任公司钦州供电局 | DC equipment inspection device in DC power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202004479U (en) | Discharging device of single-group storage battery of DC system | |
| CN110794293A (en) | Method for detecting automatic nuclear capacity switch state of storage battery | |
| CN101667747A (en) | Conversion module for extracting working power from high-voltage power | |
| CN109274182A (en) | The long-range integrated monitoring platform of DC power supply | |
| CN207977776U (en) | A kind of DC power cabinet | |
| CN111799880A (en) | Off-grid integrated communication power supply system, control method and storage medium | |
| CN102074994B (en) | Charging device of direct-current (DC) system | |
| CN107611794A (en) | Fire-fighting power distribution cabinet based on bas and fas monitoring systems | |
| CN109449944B (en) | Bidirectional direct-current power supply control system and method for transformer substation | |
| CN209208784U (en) | A kind of railway signals equipment mobile monitoring device based on DSP | |
| CN108964259A (en) | A kind of power grid intelligence control system | |
| CN210985631U (en) | Monitoring equipment | |
| CN115514067B (en) | Energy storage battery pack management system device | |
| CN108988454B (en) | Energy storage type bus circuit structure and direct-current power supply system | |
| CN114448084A (en) | Portable direct current power supply | |
| CN211790926U (en) | Intelligent low-voltage controller, low-voltage switch control system and device | |
| CN103904776A (en) | Intelligent power distribution room power system | |
| CN209979769U (en) | Collection terminal is equipped with electric patch box | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton | |
| CN209134135U (en) | Ring network cabinet emergency operation power supply | |
| CN208860936U (en) | A kind of open circuit afterflow of battery group and over-discharge alarm device | |
| CN207742305U (en) | The electric energy-stored system comprehensive evaluating device of high-voltage circuitbreaker | |
| CN201868939U (en) | DC system charging device | |
| CN101442200A (en) | Self-power digital overcurrent relay | |
| CN205377313U (en) | Switch bypass circuit, converter and direct current network deployment conversion system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181016 |