CN206977018U - Intelligent direct-current controller applied to DC circuit Control protection system - Google Patents
Intelligent direct-current controller applied to DC circuit Control protection system Download PDFInfo
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- CN206977018U CN206977018U CN201720559811.4U CN201720559811U CN206977018U CN 206977018 U CN206977018 U CN 206977018U CN 201720559811 U CN201720559811 U CN 201720559811U CN 206977018 U CN206977018 U CN 206977018U
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Abstract
The utility model discloses a kind of intelligent direct-current controller applied to DC circuit Control protection system; including CPU, voltage acquisition module and current acquisition module; CPU is electrically connected with voltage acquisition module and current acquisition module respectively; CPU is gathered in real time to the voltage in voltage acquisition module and current acquisition module, electric current; when CPU judges circuit exception from the information collected, intelligent direct-current controller disconnects circuit by controlling CPU to send police instruction and dropout instruction.DC circuit Control protection system plays a protective effect for internal detection circuitry；Sample circuit uses linear isolation optocoupler, and is designed with anti-tampering protection element, and when external circuit is shocked by electricity or electrostatic interference or when signalling channel is interfered, interference signal will not go here and there in internal detection circuitry, protect internal circuitry.There is an isolation to electric signal in linear optical coupling, have the function that to isolate interference signal, the traditional exchange of ratio of precision is high, and existing linear rule is relatively good, smoother in itself.
Description
Technical field
It the utility model is related to low voltage equipment technical field, and in particular to one kind is applied to DC circuit control protection
The intelligent direct-current controller of system.
Background technology
The failures such as overload, short circuit, ground connection typically occur in low-voltage electrical distribution system, and these failures are for circuit and power supply
Equipment can cause greatly to endanger.Intelligent protection is all realized currently as the low voltage electrical equipment of power distribution protection, it is led
Want principle be exactly by detect the electric signal of electric wiring by control module differentiate circuit in whether faulty generation, if in the presence of
Failure, which then sends instruction, makes breaker actuation, and so as to realize its protection to distribution system, wherein core component is exactly controller.
Breaker is divided into primary cut-out and low-voltage circuit breaker by its use range.Low-voltage circuit breaker is that low-voltage distribution system plays break-make control
System and the important electrical equipment of protective effect, low-voltage circuit breaker are a kind of existing hand switch effects, and and can carries out decompression, under-voltage automatically
Electrical equipment.DC controller is that supporting breaker is applied to DC circuit Control protection system.
Due to being DC circuit, traditional transformer is not suitable in direct current network DC controller.Traditional transformer
It is generally used in AC network, traditional transformer linear rule is poor, it is necessary to which in house software compensates, in programming
It is upper cumbersome.The magnetic field of alternation is produced according to the electric current of alternation, the magnetic field of alternation produces the principle work of the electric current of alternation again.
And direct current network is different from AC network, so traditional transformer is not suitable in direct current network.
The content of the invention
The purpose of this utility model be exactly in order to solve the above-mentioned problems in the prior art, propose it is a kind of it is high electrically every
From characteristic, the intelligent direct-current controller applied to DC circuit Control protection system antistatic, high pressure resistant, precision is high.
The purpose of this utility model is achieved through the following technical solutions：Intelligence applied to DC circuit Control protection system
Energy DC controller, the intelligent direct-current controller include CPU, voltage acquisition module and current acquisition module, the CPU difference
It is electrically connected with the voltage acquisition module and the current acquisition module, the CPU is to voltage acquisition module and current acquisition
Voltage, electric current in module are gathered in real time, when the CPU judges circuit exception from the information collected, the intelligence
DC controller disconnects circuit by controlling the CPU to send police instruction and dropout instruction.
Preferably, the intelligent direct-current controller is also electrically connected with a current divider or Hall sensor, and the CPU passes through
The current divider is sampled to the electric current in circuit, and sampled signal then is sent into signal processing circuit simultaneously by linear optical coupling
The CPU is transmitted to be calculated.
Preferably, the intelligent direct-current controller is also connected with a wire harness, and the intelligent direct-current controller is straight by wire harness
Connect and be connected with power network and then the voltage in circuit is sampled, sampled signal is then sent to by signal transacting by linear optical coupling
Circuit is simultaneously transmitted to the CPU and calculated.
Preferably, the current acquisition module includes current collection circuit, and the current collection circuit inputs including positive pole
Hold input1, negative input input2, cathode output end VI+, cathode output end VI-, linear optical coupling U1, piezo-resistance
VAR1, bilateral diode D1, inductance R1, inductance R3, resistance R2, resistance R4, electric capacity C1, electric capacity C2, electrode input end input1
Electrically connected with piezo-resistance VAR1 first ends, bilateral diode D1 first ends, inductance R1 first ends, the ends of inductance R1 second and resistance
R2 first ends electrically connect, and the ends of resistance R2 second electrically connect with resistance R4 first ends, electric capacity C1 first ends, linear optical coupling U1 2 pin,
Negative input input2 electrically connects with the ends of piezo-resistance VAR1 second, the ends of bilateral diode D1 second, inductance R3 first ends, electricity
3 pin, 4 pin for feeling the ends of R3 second, the ends of resistance R4 second, the ends of electric capacity C1 second and linear optical coupling U1 are all grounded, linear optical coupling U1
1 pin electrically connected with power vd D2, linear optical coupling U1 8 pin electrically connect with power vd D1, electric capacity C2 first ends, electric capacity C2 second
End, linear optical coupling U1 5 pin are all grounded, and linear optical coupling U1 7 pin electrically connect with cathode output end VI+, linear optical coupling U1 6 pin
Electrically connected with cathode output end VI-.
Preferably, the voltage acquisition module includes voltage collection circuit, and the voltage collection circuit inputs including positive pole
Hold UIN1, negative input UIN2, cathode output end UO+, cathode output end UO-, linear optical coupling U2, bilateral diode D2, electricity
Resistance R5, resistance R6, resistance R7, electric capacity C3, electrode input end UIN1 electrically connect with resistance R5 first ends, resistance R5 the second end and
The 2 pin electrical connection of resistance R7 first end, bilateral diode D2 first end, electric capacity C3 first end, linear optical coupling, negative pole are defeated
Enter to hold UIN2 to be electrically connected with the ends of resistance R6 second, resistance R6 the second end and resistance R7 the second end, the of bilateral diode D2
Two ends, electric capacity C3 the second end electrical connection, the ends of electric capacity C3 second and linear optical coupling U2 3 pin, 4 pin are all grounded, linear optical coupling
U2 1 pin electrically connects with power vd D2, and linear optical coupling U2 8 pin electrically connect with power vd D1, electric capacity C4 first ends, electric capacity C4
Two ends, linear optical coupling U2 5 pin are all grounded, and linear optical coupling U2 7 pin electrically connect with cathode output end VI+, and the 6 of linear optical coupling U2
Pin electrically connects with cathode output end VI-.
Preferably, the intelligent direct-current controller and a breaker are electrically connected with, the input of the intelligent direct-current controller
End is connected with the output end of power network, and the input of the breaker is connected with the output end of power network.
The advantages of technical solutions of the utility model, is mainly reflected in：The DC circuit Control protection system detects for inside
Circuit plays a protective effect；Sample circuit uses linear isolation optocoupler, and is designed with anti-tampering protection element, when outer
Portion's circuit is shocked by electricity or electrostatic interference or when signalling channel is interfered, and interference signal will not go here and there around internal detection circuitry
In, protect internal circuitry.There is an isolation to electric signal in linear optical coupling, have the work of isolation interference signal in itself
With the traditional exchange of ratio of precision is high, and existing linear rule is relatively good, smoother.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model intelligent direct-current controller；
Fig. 2 is the structural representation of the utility model intelligent direct-current controller, current acquisition module and voltage acquisition module；
Fig. 3 is the current collection circuit of the utility model intelligent direct-current controller；
Fig. 4 is the voltage collection circuit of the utility model intelligent direct-current controller；
Fig. 5 is the Modbus of the utility model intelligent direct-current controller Principle of Communication figure；
Fig. 6 is the CAN communication schematic diagram of the utility model intelligent direct-current controller；
Fig. 7 is the power circuit diagram of the utility model intelligent direct-current controller.
Embodiment
The purpose of this utility model, advantage and feature, figure will be carried out by the non-limitative illustration of preferred embodiment below
Show and explain.These embodiments are only the prominent examples using technical solutions of the utility model, all to take equivalent substitution or wait
Effect conversion and formed technical scheme, all fall within the requires of the utility model protection within the scope of.
Such as Fig. 1 and as shown in Fig. 2 intelligent direct-current controller applied to DC circuit Control protection system, the intelligence
DC controller 1 includes CPU 2, voltage acquisition module 3 and current acquisition module 4.The CPU2 respectively with the voltage acquisition
Module 3 and the current acquisition module 4 are electrically connected with, and can be with setting electric current Protection parameters.The CPU 2 is to voltage acquisition mould
Voltage, electric current in block and current acquisition module are gathered in real time, and compared with set Protection parameters, when described
CPU 2 from the information collected judge circuit exception when, the intelligent direct-current controller 1 is by controlling the CPU 2 to send report
Alert instruction and dropout instruction disconnect circuit.
Specifically, the CPU 2 gathers circuit voltage and current signal and circuit is checked in real time, when discovery circuit is different
Often, the intelligent direct-current controller 1 can enter defence program, and make police instruction or hair dropout instruction（Sub-gate signal）, make
The dc circuit breaker separating brake, disconnecting circuit is to protect electrical equipment.The intelligent direct-current controller is also with a current divider 5 or suddenly
You are electrically connected with sensor, and the CPU1 is sampled by the current divider 5 to the electric current in circuit, then passes through linear light
Sampled signal is sent to signal processing circuit and is transmitted to the CPU and calculated by coupling.
The main control unit is also electrically connected with a current divider 5 or Hall sensor, and the current divider 5 is resistive very little
Resistance, when high current produce small voltage signal, i.e., current divider be one can be by the resistance of extreme currents, its D.C. resistance
It is strictly to mix up to be serially connected in DC circuit, DC current flows through current divider, and current divider both ends produce millivolt level DC voltage letter
Number, sample circuit is acquired to the voltage signal, and current value size in circuit is calculated through CPU.Sample circuit uses line
Sexual isolation optocoupler, and be designed with anti-tampering protection element, when external circuit is shocked by electricity or electrostatic interference or when signal leads to
When road is interfered, interference signal will not go here and there in internal detection circuitry, to protect the work of internal circuitry normal reliable
Make.The linear optical coupling plays a protective effect for internal detection circuitry, and linear optical coupling has one to electric signal in itself
Isolation, and can be antistatic or high pressure resistant, the traditional exchange of ratio of precision is high, and existing linear rule is relatively good, smoother.
The current acquisition module 4 includes current collection circuit.It is illustrated in figure 3 intelligent direct-current controller current acquisition electricity
Road, current collection circuit include electrode input end input1, negative input input2, cathode output end VI+, cathode output end
VI-, linear optical coupling U1, piezo-resistance VAR1, bilateral diode D1, inductance R1, inductance R3, resistance R2, resistance R4, electric capacity C1,
Electric capacity C2, electrode input end input1 and piezo-resistance VAR1 first end, bilateral diode D1 first ends, inductance R1 first ends electricity
Connection, the ends of inductance R1 second electrically connect with resistance R2 first ends, the ends of resistance R2 second and resistance R4 first ends, electric capacity C1 first
End, linear optical coupling U1 2 pin electrical connection, negative input input2 and the ends of piezo-resistance VAR1 second, bilateral diode D1 the
Two ends, the electrical connection of inductance R3 first ends, the ends of inductance R3 second, the ends of resistance R4 second, the ends of electric capacity C1 second and linear optical coupling U1
3 pin, 4 pin be all grounded, linear optical coupling U1 1 pin electrically connects with power vd D2, linear optical coupling U1 8 pin and power vd D1, electricity
Hold the electrical connection of C2 first ends, the ends of electric capacity C2 second, linear optical coupling U1 5 pin are all grounded, and linear optical coupling U1 7 pin and positive pole export
VI+ electrical connections are held, linear optical coupling U1 6 pin electrically connect with cathode output end VI-.Wherein, VAR1 is piezo-resistance, and D1 is transient state
Suppress diode, R1, R3 are inductance, and R2, R4 are divider resistance, and U1 is linear optical coupling, VDD1 and the working power that VDD2 is U1.
The voltage signal that current divider both ends come out enters current sampling circuit by Input1 and Input2, then through R2, R4 resistance point
After pressure, small voltage signal that R4 electric resistance partial pressures are obtained is sent in linear optical coupling U1, after U1 isolates, by the small of same ratio
Voltage signal is sent in signal processing circuit, and then CPU is AD converted to the analog signal in signal processing circuit, is calculated
The real current value gone out in circuit, whether decision circuitry is normal, makes corresponding instruction.
The intelligent direct-current controller 1 is also connected with a wire harness, the intelligent direct-current controller 1 by wire harness directly with electricity
Net is connected and then the voltage in circuit is sampled, and sampled signal then is sent into signal processing circuit simultaneously by linear optical coupling
The CPU is transmitted to be calculated.The linear optical coupling is used to be isolated input signal and output signal, the linear optical coupling
Itself an isolation to electric signal be present.
The voltage acquisition module 3 includes voltage collection circuit, is illustrated in figure 4 voltage collection circuit, and the voltage is adopted
Collector includes electrode input end UIN1, negative input UIN2, cathode output end UO+, cathode output end UO-, linear optical coupling
U2, bilateral diode D2, resistance R5, resistance R6, resistance R7, electric capacity C3, electrode input end UIN1 are electrically connected with resistance R5 first ends
Connect, resistance R5 the second end and resistance R7 first end, bilateral diode D2 first end, electric capacity C3 first end, linear light
The 2 pin electrical connection of coupling, negative input UIN2 electrically connect with the ends of resistance R6 second, resistance R6 the second end and the second of resistance R7
End, the second end electrical connection at bilateral diode D2 the second end, electric capacity C3, the ends of electric capacity C3 second and linear optical coupling U2 3 pin,
4 pin are all grounded, and linear optical coupling U2 1 pin electrically connects with power vd D2, linear optical coupling U2 8 pin and power vd D1, electric capacity C4 the
One end is electrically connected, and the ends of electric capacity C4 second, linear optical coupling U2 5 pin are all grounded, linear optical coupling U2 7 pin and cathode output end VI+
Electrical connection, linear optical coupling U2 6 pin electrically connect with cathode output end VI-.Wherein, D2 is Transient Suppression Diode, will be protected
Circuit in voltage respective terminal on controller is directly guided to by wire（UIN+ and UIN-）, by sample circuit
R5, R6, R7 divider resistance, the ohmically small voltage signals of R7 are sent to signal processing circuit by isolating linear optical coupling, then
CPU is AD converted to the analog signal in signal processing circuit, and the true voltage value in circuit is calculated, and decision circuitry is
It is no normal, make corresponding instruction.
By the voltage in shielded circuit directly by wire guide to respective terminal UIN+ and UIN on controller-, lead to
R1, R2, R3 divider resistance in over-sampling circuit, small voltage signal is sent to signal processing circuit by isolating linear optical coupling,
Then calculate and judge through the CPU.The intelligent direct-current controller is electrically connected with a breaker 6, the intelligent DC
The input of controller is connected with the output end of power network, and the input of the breaker is connected with the output end of power network.
Fig. 5, Fig. 6 are the Principle of Communication figure of controller, and specifically, Fig. 5 is Modbus Principle of Communication figure, and Fig. 6 leads to for CAN
Schematic diagram is interrogated, all data of controller working can be read out by operating personnel by communicating, operating personnel
The running status of circuit and controller need not be understood to live can.When operating personnel read data, CPU receives finger
Order, the data for needing to read then are sent to communication chip, operating personnel are sent to after communication chip is changed.Communication chip
Controller internal circuit can be isolated with external communication circuit, ensure that external disturbance will not cause brokenly to internal wiring
It is bad.
Chip plays judgement in the circuit, it is assumed that during normal work, what chip detected is 1.5V small voltages, works as electricity
Short circuit occurs for source circuit, and at this moment electric current is bigger, and what chip detected is not that 1.5V small voltages are probably 3V voltages, and controller enters
Enter defence program and make dropout instruction, magnetic flux is projected out plug-in strip and separated, and protects electrical equipment, and chip sends dropout instruction, taken off
Button makes breaker open operation by magnetic flux, after separating brake, breaker disconnection.
Fig. 7 is intelligent direct-current controller power circuit diagram, becomes pulse direct current after the rectified bridge DB1 of external communication, then pass through
Power supply chip U1 and inductance L1, obtains desired voltage signal, and the power circuit can connect AC power, can also connect dc source,
And large power supply can be provided for internal circuit, ensure the normal work of circuit.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit and essential characteristics of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model, any reference in claim should not be considered as into limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (6)
1. the intelligent direct-current controller applied to DC circuit Control protection system, it is characterised in that：The intelligent DC control
Device（1）Including CPU（2）, voltage acquisition module（3）And current acquisition module（4）, the CPU（2）Respectively with the voltage acquisition
Module（3）With the current acquisition module（4）It is electrically connected with, the CPU（2）To voltage acquisition module（3）With current acquisition mould
Block（4）In voltage, electric current gathered in real time, as the CPU（2）It is described when judging circuit exception from the information collected
Intelligent direct-current controller（1）By controlling the CPU（2）Sending police instruction and dropout instruction disconnects circuit.
2. the intelligent direct-current controller according to claim 1 applied to DC circuit Control protection system, its feature exists
In：The intelligent direct-current controller（1）Also with a current divider（5）Or Hall sensor connection, the CPU（2）Pass through described point
Flow device（5）Electric current in circuit is sampled, sampled signal is then sent to by signal processing circuit by linear optical coupling and passed
To the CPU（2）Calculated.
3. the intelligent direct-current controller according to claim 1 applied to DC circuit Control protection system, its feature exists
In：The intelligent direct-current controller（1）Also it is connected with a wire harness, the intelligent direct-current controller（1）By wire harness directly with electricity
Net is connected and then the voltage in circuit is sampled, and sampled signal then is sent into signal processing circuit simultaneously by linear optical coupling
It is transmitted to the CPU（2）Calculated.
4. the intelligent direct-current controller according to claim 1 applied to DC circuit Control protection system, its feature exists
In：The current acquisition module includes current collection circuit, and the current collection circuit includes electrode input end input1, negative pole
Input input2, cathode output end VI+, cathode output end VI-, linear optical coupling U1, piezo-resistance VAR1, bilateral diode
D1, inductance R1, inductance R3, resistance R2, resistance R4, electric capacity C1, electric capacity C2, electrode input end input1 and piezo-resistance VAR1 the
One end, bilateral diode D1 first ends, the electrical connection of inductance R1 first ends, the ends of inductance R1 second electrically connect with resistance R2 first ends,
The ends of resistance R2 second electrically connect with resistance R4 first ends, electric capacity C1 first ends, linear optical coupling U1 2 pin, negative input
Input2 electrically connects with the ends of piezo-resistance VAR1 second, the ends of bilateral diode D1 second, inductance R3 first ends, inductance R3 second
End, the ends of resistance R4 second, the ends of electric capacity C1 second and linear optical coupling U1 3 pin, 4 pin are all grounded, linear optical coupling U1 1 pin and electricity
Source VDD2 is electrically connected, and linear optical coupling U1 8 pin electrically connect with power vd D1, electric capacity C2 first ends, the ends of electric capacity C2 second, linear light
Coupling U1 5 pin are all grounded, and linear optical coupling U1 7 pin electrically connect with cathode output end VI+, and linear optical coupling U1 6 pin and negative pole are defeated
Go out to hold VI- to electrically connect.
5. the intelligent direct-current controller according to claim 1 applied to DC circuit Control protection system, its feature exists
In：The voltage acquisition module includes voltage collection circuit, and it is defeated that the voltage collection circuit includes electrode input end UIN1, negative pole
Enter to hold UIN2, cathode output end UO+, cathode output end UO-, linear optical coupling U2, bilateral diode D2, resistance R5, resistance R6, electricity
Resistance R7, electric capacity C3, electrode input end UIN1 electrically connect with resistance R5 first ends, resistance R5 the second end and the first of resistance R7
End, the 2 pin electrical connection of bilateral diode D2 first end, electric capacity C3 first end, linear optical coupling, negative input UIN2 and electricity
Hinder the electrical connection of R6 second ends, resistance R6 the second end and resistance R7 the second end, bilateral diode D2 the second end, electric capacity C3
Second end is electrically connected, and the ends of electric capacity C3 second and linear optical coupling U2 3 pin, 4 pin are all grounded, linear optical coupling U2 1 pin and power supply
VDD2 is electrically connected, and linear optical coupling U2 8 pin electrically connect with power vd D1, electric capacity C4 first ends, the ends of electric capacity C4 second, linear optical coupling
U2 5 pin are all grounded, and linear optical coupling U2 7 pin electrically connect with cathode output end VI+, and linear optical coupling U2 6 pin and negative pole export
Hold VI- electrical connections.
6. the intelligent direct-current controller according to claim 1 applied to DC circuit Control protection system, its feature exists
In：The intelligent direct-current controller（1）With a breaker（6）It is electrically connected with, input and the electricity of the intelligent direct-current controller
The output end of net is connected, and the input of the breaker is connected with the output end of power network.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016213355482 | 2016-12-07 | ||
| CN201621335548 | 2016-12-07 |
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| Publication Number | Publication Date |
|---|---|
| CN206977018U true CN206977018U (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720559811.4U Active CN206977018U (en) | 2016-12-07 | 2017-05-19 | Intelligent direct-current controller applied to DC circuit Control protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579647A (en) * | 2019-07-26 | 2019-12-17 | 中国南方电网有限责任公司超高压输电公司梧州局 | Control protection system with insulation monitoring and active prevention functions |
-
2017
- 2017-05-19 CN CN201720559811.4U patent/CN206977018U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579647A (en) * | 2019-07-26 | 2019-12-17 | 中国南方电网有限责任公司超高压输电公司梧州局 | Control protection system with insulation monitoring and active prevention functions |
| CN110579647B (en) * | 2019-07-26 | 2020-10-09 | 中国南方电网有限责任公司超高压输电公司梧州局 | Control protection system with insulation monitoring and active prevention functions |
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