CN108063457A - A kind of breaker intelligence control system - Google Patents
A kind of breaker intelligence control system Download PDFInfo
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- CN108063457A CN108063457A CN201711433353.0A CN201711433353A CN108063457A CN 108063457 A CN108063457 A CN 108063457A CN 201711433353 A CN201711433353 A CN 201711433353A CN 108063457 A CN108063457 A CN 108063457A
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- 230000005611 electricity Effects 0.000 claims abstract description 43
- 238000005070 sampling Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000006837 decompression Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 12
- 230000003111 delayed effect Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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Classifications
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides a kind of breaker intelligence control system, includes cpu control circuit；Line voltage sample circuit is electrically connected with electric network source, and is electrically connected with cpu control circuit；Circuit breaker position sample circuit, is electrically connected with cpu control circuit；Motor-drive circuit is electrically connected with cpu control circuit；Direct current generator is electrically connected with motor-drive circuit, and is connected with breaker；Switching power circuit is electrically connected with cpu control circuit, circuit breaker position sample circuit, motor-drive circuit and direct current generator.The present invention automatically cuts off alternating current and load when detecting utility grid power failure, decompression or overvoltage after certain time is delayed, and distributed grid-connected electricity generation system is made to be separated with utility grid.When utility grid voltage is normal, utility grid is cut automatically and is loaded, and distributed grid-connected electricity generation system is connected to the grid.When solving the disadvantages that distributed grid-connected electricity generation system accesses alternating current, power grid is susceptible to island effect, promotes the stability and security of operation of power networks.
Description
Technical field
The present invention relates to Electric control field, more particularly to a kind of breaker intelligence control system.
Background technology
Distributed solar energy photovoltaic generating system, as a kind of Renewable green energy, just from the supplement energy to alternative energy source
Direction changes.At present, various countries increasingly pay attention to distributed photovoltaic power generation system grid connection gas-to electricity.Since distributed grid-connected generates electricity
System directly will be sent to power grid after solar energy inversion, so needing safeguard measure, be particularly preventing for island effect.Isolated island is imitated
It should refer to：The power supply of Utilities Electric Co., due to failure accident or power failure repair during de- jump, the distributed grid-connected power generation of each user terminal is
System fails to detect power down mode in time and itself will cut off alternating current network, and is formed by distributed grid-connected electricity generation system and surrounding
The self-energizing isolated island that can not grasp of a Utilities Electric Co. that is formed of load.Island effect is to Utilities Electric Co.'s transmission line of electricity repair
Personnel cause safety hazard；Influence the protection switch operation program in distribution system；The power supply electricity that electric power isolated island region is occurred
Pressure and frequency are unstable etc..Therefore, it is necessary to eliminate island effect.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of breaker intelligent control systems
System, for solving that distributed grid-connected electricity generation system cannot be controlled automatically according to the operating condition of utility grid in the prior art
It is electrically disconnected or connect with city, and easily lead to the problem of island effect.
In order to achieve the above objects and other related objects, the present invention provides a kind of breaker intelligence control system, described disconnected
Road device is electrically connected with a distributed grid-connected electricity generation system and an electric network source, and the intelligence control system includes：CPU control electricity
Road；Line voltage sample circuit is electrically connected with the electric network source, and is electrically connected with the cpu control circuit；Circuit breaker position
Sample circuit is electrically connected with the cpu control circuit；Motor-drive circuit is electrically connected with the cpu control circuit；Direct current
Machine is electrically connected with the motor-drive circuit, and is connected with the breaker；Switching power circuit controls electricity with the CPU
Road, the circuit breaker position sample circuit, the motor-drive circuit and direct current generator electrical connection, and be the CPU
Control circuit, the circuit breaker position sample circuit, the motor-drive circuit and the direct current generator provide power supply.
In a specific embodiment of the invention, sampled in the electric network source, so that the cpu control circuit obtains
Take sampled result.
In an of the invention specific embodiment, the circuit breaker position sample circuit be used for the position of the breaker into
Row sampling, the position of the breaker include closing position and open position.
In a specific embodiment of the invention, the cpu control circuit is used for the sampled result is default normal with one
Voltage range is compared, and when the sampled result belongs to the normal voltage range, is sent to the switching power circuit
Open command makes the Switching Power Supply in running order, and continues to obtain working as the circuit breaker position sampling circuit samples
Front position, and when the current location is not at the closing position, switching signal, institute are sent to the motor-drive circuit
It states motor-drive circuit and reclosing command is sent to the direct current generator according to the switching signal, make the direct current generator according to institute
It states reclosing command and performs closing operation, the breaker to be made to be in the closing position, and then send out the distributed grid-connected
Electric system is connected with the electric network source；When the sampled result exceeds the normal voltage range, to the Switching Power Supply
Circuit sends out code, and the Switching Power Supply is made to be in stop working state, after the default delay time of delay, is opened to described
Powered-down source circuit sends the open command, and continues to obtain the current location of the circuit breaker position sampling circuit samples, and
When the current location is not at the open position, sub-gate signal is sent to the motor-drive circuit, the motor drives
Dynamic circuit sends separating brake instruction according to the sub-gate signal to the direct current generator, and the direct current generator is made to be referred to according to the separating brake
Order perform sub-switching operation, the breaker to be made be in the open position, so make the distributed grid-connected electricity generation system and
The electric network source disconnects.
In a specific embodiment of the invention, the position of the breaker further includes clutch reset position；Wherein, it is described
Cpu control circuit sends to the motor-drive circuit after the completion of the closing operation or sub-switching operation is judged and resets letter
Number, the motor-drive circuit sends reset instruction according to the reset signal to the direct current generator, to make the direct current
Machine is performed according to the reset instruction resets operation, and then the breaker is made to be in the clutch reset position.
In a specific embodiment of the invention, the motor-drive circuit includes driving chip U1, passes through the chip U1
The 7th pin INA and the 8th pin INB be electrically connected with the cpu control circuit, and the 4th by the chip U1 draws
Foot OUTA and the 6th pin OUTB are electrically connected with the direct current generator.
In a specific embodiment of the invention, the circuit breaker position sample circuit includes examining the closing position
The first Hall element U2 for surveying, the second Hall element U3 being detected to the open position and to the clutch reset
The 3rd Hall element U4 that position is detected.
In a specific embodiment of the invention, the line voltage sample circuit includes carrying out half-wave to the electric network source
The diode D1 of rectification further includes the divider resistance being electrically connected with the diode D1, and the divider resistance is to through two pole
Electric network source after pipe D1 rectifications is exported by output terminal to the cpu control circuit after being divided.
In a specific embodiment of the invention, the line voltage sample circuit further includes a filter capacitor, the filtering
The first end ground connection of capacitance, the second end of the filter capacitor are electrically connected with the output terminal.
In a specific embodiment of the invention, the switching power circuit includes exchange input rectifying filter module, buffering
Module, PWM control modules, auxiliary power module, auxiliary feedback module, output rectification filter module, LDO Voltage stabilizing modules and AC/
DC switch control modules.
In a specific embodiment of the invention, the switching power circuit further includes a circuit protection module, the circuit
The varistor that protection module is electrically connected by one with the electric network source forms.
As described above, the breaker intelligence control system of the present invention, including cpu control circuit；Line voltage sample circuit,
It is electrically connected with the electric network source, and is electrically connected with the cpu control circuit；Circuit breaker position sample circuit is controlled with the CPU
Circuit electrical connection processed；Motor-drive circuit is electrically connected with the cpu control circuit；Direct current generator, with the motor-drive circuit
Electrical connection, and be connected with the breaker；Switching power circuit, with the cpu control circuit, circuit breaker position sampling electricity
Road, the motor-drive circuit and direct current generator electrical connection, and be the cpu control circuit, the circuit breaker position
Sample circuit, the motor-drive circuit and the direct current generator provide power supply.The present invention can detect utility grid in real time
No power failure, decompression or overvoltage.When detecting that utility grid has a power failure, decompression or automatically cuts off after certain time is delayed during overvoltage
Alternating current and load, make distributed grid-connected electricity generation system be separated with utility grid.When utility grid incoming call and normal voltage, automatically
Utility grid is cut and is loaded, and distributed grid-connected electricity generation system is connected to the grid.It solves distributed grid-connected electricity generation system to connect
When entering alternating current, the shortcomings that power grid is susceptible to island effect, promotes the stability and security of operation of power networks.
Description of the drawings
Fig. 1 is shown as the composition schematic diagram of the breaker intelligence control system of the present invention in one embodiment.
Fig. 2 is shown as the theory structure schematic diagram for the motor-drive circuit applied in the specific embodiment of the present invention.
Fig. 3 is shown as the theory structure signal for the line voltage sample circuit applied in the specific embodiment of the present invention
Figure.
Fig. 4 is shown as the theory structure signal for the circuit breaker position sample circuit applied in the specific embodiment of the present invention
Figure.
Fig. 5 is shown as the theory structure schematic diagram for the switching power circuit applied in the specific embodiment of the present invention.
Fig. 6 is shown as the theory structure schematic diagram for the cpu control circuit applied in the specific embodiment of the present invention.
Component label instructions
100 breaker intelligence control systems
101 cpu control circuits
102 line voltage sample circuits
103 circuit breaker position sample circuits
104 motor-drive circuits
105 direct current generators
106 switching power circuits
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the case where there is no conflict, following embodiment and implementation
Feature in example can be mutually combined.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in illustrating then
It draws, kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its assembly layout kenel
It is likely more complexity.
In order to effectively eliminate the island effect in existing electric system, the present invention proposes a kind of breaker intelligent control
Whether system has a power failure, decompression or overvoltage for detecting utility grid in real time.When detect utility grid have a power failure, decompression or overvoltage
When automatically cut off after certain time is delayed alternating current with load, distributed grid-connected electricity generation system is made to be separated with utility grid.When
When utility grid incoming call and normal voltage, utility grid is cut automatically and is loaded, and distributed grid-connected electricity generation system is incorporated to electricity
Net.
Referring to Fig. 1, it is shown as the composition signal of the breaker intelligence control system of the present invention in one embodiment
Figure.The breaker is electrically connected with a distributed grid-connected electricity generation system and an electric network source, the breaker intelligent control system
System 100 for control the breaker open a sluice gate or separating brake, to make the distributed grid-connected electricity generation system and the power grid electricity
Source disconnects or connects, and the breaker intelligence control system 100 includes：Cpu control circuit 101, line voltage sample circuit
102nd, circuit breaker position sample circuit 103, motor-drive circuit 104, direct current generator 105 and switching power circuit 106.
The line voltage sample circuit 102 is electrically connected with the electric network source, and electric with the cpu control circuit 101
Connection；The circuit breaker position sample circuit 103 is electrically connected with the cpu control circuit 101；The motor-drive circuit 104
It is electrically connected with the cpu control circuit 101；The direct current generator 105 is electrically connected with the motor-drive circuit 104, and with institute
State breaker connection；The switching power circuit 106 and the cpu control circuit 101, the circuit breaker position sample circuit
103rd, the motor-drive circuit 104 and the direct current generator 105 are electrically connected, and are the cpu control circuit 101, described
Circuit breaker position sample circuit 103, the motor-drive circuit 104 and the direct current generator 105 provide power supply.
The line voltage sample circuit 102 is for sampling the electric network source, for the cpu control circuit
101 obtain sampled result.The circuit breaker position sample circuit 103 is described for being sampled to the position of the breaker
The position of breaker includes closing position and open position.
And the cpu control circuit 101 is used for the sampled result compared with a default normal voltage range.
When the sampled result belongs to the normal voltage range, send unlatching to the switching power circuit 106 and refer to
Order, makes the switching power circuit 106 in running order, and continues to obtain the circuit breaker position sample circuit 103 and sample
Current location, and when the current location is not at the closing position, sends and close a floodgate to the motor-drive circuit 104
Signal, the motor-drive circuit 104 sends reclosing command according to the switching signal to the direct current generator 105, to make
It states direct current generator 105 and closing operation is performed according to the reclosing command, the breaker to be made to be in the closing position, and then
The distributed grid-connected electricity generation system is made to be connected with the electric network source.
When the sampled result exceeds the normal voltage range, i.e., when electric network source power failure, decompression or overvoltage, to
The switching power circuit 106 sends out code, and the switching power circuit 106 is made to be in stop working state, is being delayed
After default delay time, the open command is sent to the switching power circuit 106, and continues to obtain the circuit breaker position
The current location that sample circuit 103 samples, and when the current location is not at the open position, driven to the motor
Circuit 104 sends sub-gate signal, and the motor-drive circuit 104 is sent according to the sub-gate signal to the direct current generator 105
Separating brake instructs, and sub-switching operation is performed so that the direct current generator 105 to be made to be instructed according to the separating brake, the breaker to be made to be in institute
Open position is stated, and then the distributed grid-connected electricity generation system is made to be disconnected with the electric network source, avoids the generation of island effect.
Preferably, the position of the breaker further includes clutch reset position；Wherein, the cpu control circuit 101 exists
After the completion of judging the closing operation or sub-switching operation, reset signal, the motor are sent to the motor-drive circuit 104
Driving circuit 104 sends reset instruction according to the reset signal to the direct current generator 105, to make the direct current generator 105
It is performed according to the reset instruction and resets operation, the breaker to be made to be in the clutch reset position, ensure to break with this
The handle of road device can use the free divide-shut brake of hand.
Preferably, breaker of the invention uses grid-connected breaker, and grid-connected breaker is by having protection work(
The breaker of energy and the breaker for being exclusively used in photovoltaic parallel in system for performing operating mechanism composition.Operating mechanism is performed to be mainly used to
The separating brake and combined floodgate of breaker are controlled, power grid is made to disconnect and connect with load.And operating mechanism is by direct current generator and gear
Transmission mechanism drives the separating brake of breaker and feed motion, it is therefore necessary to have a driving circuit to control turning clockwise for motor
It moves, rotate counterclockwise, brake, so as to complete the separating brake of breaker and combined floodgate.
Specifically, Fig. 2~Fig. 6 is referred to, wherein, the circuit of the motor-drive circuit 104 and the direct current generator 105
Connection as shown in Fig. 2, the motor-drive circuit 104 include driving chip U1, pass through the pin INA and pin of the chip U1
INB is electrically connected with the cpu control circuit, and the pin OUTA and pin OUTB by the chip U1 and the direct current generator
Electrical connection.Specifically, the chip U1 is direct current generator special chip, make circuit simple while reliability is ensured, cost
Cheap, the chip U1 includes H bridges and driving circuit, directly controls the direct current generator 105.The second pin of the chip U1
VCC and the 3rd pin VM is power pins, and the DC power supply with a 12V is electrically connected, and is grounded by capacitance C1, the chip
The 7th pin INA of U1 and the 8th pin INB is logic control input pin；The 4th pin OUTA and the 6th of the chip U1
Pin OUTB is output motor load prongs, is electrically connected respectively with the anode of motor Motor1 and cathode.
As the 7th pin INA=1 and the 8th pin INB=1, the braking of the direct current generator 105 is realized；
As the 7th pin INA=1 and the 8th pin INB=0, realize that the up time of the direct current generator 105 rotates；Work as institute
When stating the 7th pin INA=0 and the 8th pin INB=1, rotating counterclockwise for the direct current generator 105 is realized；When described
7th pin INA=0 and during the 8th pin INB=0, realizes freely stopping for the direct current generator 105.Wherein ONC,
OFFC is communicated to connect respectively with the tenth pin RC0 and the 11st pin RA2 of the 101 chips U7 of cpu control circuit, when defeated
Go out ONC=1, during OFFC=1, INA=1, INB=1 realize the braking of direct current generator 105；As output ONC=1, OFFC=0
When, INA=1, INB=0 realize rotating clockwise for direct current generator 105, that is, when exporting the switching signal, to the direct current
Motor 105 sends the reclosing command that the direct current generator 105 is controlled to be rotated clockwise, and closes a floodgate so that the breaker is in
Position, i.e. the lock of the breaker is made to be displaced into the closing position, and then make the distributed grid-connected electricity generation system with it is described
Electric network source is connected；As output ONC=0, OFFC=1, INA=0 and INB=1 realize that the motor inverse time rotates, that is, export institute
When stating sub-gate signal, the separating brake that the direct current generator 105 is controlled to be rotated counterclockwise is sent to the direct current generator 105 and is referred to
Order, so that the breaker is in open position, i.e. the lock of the breaker is made to be displaced into the open position, and then makes institute
Distributed grid-connected electricity generation system is stated to disconnect with the electric network source；As output ONC=0, OFFC=0, INA=0 and INB=0,
It realizes freely stopping for the direct current generator 105, reduces circuit power consumption.Control breaker can be well realized in the chip U1
Separating brake or combined floodgate, make power grid and load it is open or closed.
Further, the motor-drive circuit 104 further includes resistance R1, resistance R2, resistance R3 and resistance R4.It is described
The first end of resistance R1 is electrically connected with the 8th pin INB of the first end of the resistance R4 with the chip U1, the resistance
The second end of R1 is electrically connected by the OFFC with the 11st pin RA2 of the chip U7, the first end of the resistance R2 with
Seventh pin INA of the first end of the resistance R3 with the chip U1 is electrically connected, and the second end of the resistance R2 passes through institute
The tenth pin RC0 that ONC is stated with the chip U7 is electrically connected, the second end of the second end of the resistance R4 and the resistance R3
It is grounded.
Since grid-connected intelligent breaker will be realized under power grid decompression, under-voltage and overpressure situation, breaker can be made automatically
Separating brake, voltage normally under can make breaker closing automatically, it is necessary to have the real-time sampling circuit to network voltage, calculate in real time
To the voltage of power grid, different breaker actuations is then made according to the size of voltage.As shown in figure 3, it is shown as the present invention's
The theory structure schematic diagram for the line voltage sample circuit applied in one specific embodiment.
The line voltage sample circuit 102 includes carrying out the electric network source diode D1 of halfwave rectifier, also wraps
The divider resistance being electrically connected with the diode D1 is included, the divider resistance is to the electric network source after the diode D1 rectifications
It is exported after being divided by output terminal to the cpu control circuit.Specifically, the divider resistance includes resistance R5, resistance
R6 and resistance R7.The anode of the diode D1 is electrically connected, the diode D1 with the electric network source (power grid input L lines)
Cathode be electrically connected with the first end of the resistance R5, the second end of the resistance R5 and the first end of the resistance R6 are electrically connected
Connect, the first end of the second end of the resistance R6 and the resistance R7, and the second end of the resistance R6 by ADV with it is described
The 13rd pin AN0 electrical connections of 101 chips U7 of cpu control circuit.The second end ground connection of the resistance R7.Pass through partial pressure
Resistance obtains the small voltage signal ADV proportional with network voltage and inputs the progress of the cpu control circuit 101 AD samplings.
Further, the line voltage sample circuit 102 further includes a filter capacitor C2, for removing power grid burr,
Improve measurement voltage stabilization and reliability described in filter capacitor C2 first end ground connection, the second end of the filter capacitor C2 with
The output terminal electrical connection, i.e., the second end of described filter capacitor C2 pass through the ADV and 101 core of cpu control circuit
The 13rd pin AN0 electrical connections of piece U7.
It refers to shown in Fig. 4, is shown as the circuit breaker position sample circuit applied in the specific embodiment of the present invention
Theory structure schematic diagram.The grid-connected intelligent breaker that the present invention uses has closing position, open position and clutch reset
Position.Motor to the divide-shut brake action of breaker is acted accordingly according to these three positions.When network voltage decompression,
When under-voltage or over-pressed, if breaker is in closing position, the then progress of direct current generator 105 separating brake action；When network voltage is normal, such as
Breaker carries out feed motion in open position, then direct current generator 105.After the completion of divide-shut brake direct current generator 105 must carry out from
Clutch homing action, it is ensured that handle can use the free divide-shut brake of hand.Therefore, it is necessary to the sample circuit there are three position.The present invention
Position detection is carried out using Hall element induced magnetism principle as shown in Figure 4, the circuit breaker position sample circuit 103 wraps
Include the first Hall element U2 being detected to the closing position, the second Hall element being detected to the open position
U3 and the 3rd Hall element U4 being detected to the clutch reset position.First Hall element U2, the second Hall member
The structure and composition of part U3 and the 3rd Hall element U4 are identical, wherein, the first pin VCC of the first Hall element U2 connects
The DC level of 12V, the second pin OUT of the first Hall element U2 pass through ONP and the core of the cpu control circuit 101
Piece U7 second pin RA5 communication connection, the first Hall element U2 the 3rd pin ground connection, further include both ends respectively with institute
State the second pin of the first Hall element U2 and the capacitance C3 of the 3rd pin electrical connection.Wherein, the first of the second Hall element U3
Pin VCC connects the DC level of 12V, and the second pin OUT of the second Hall element U3 controls electricity by the OFFP and CPU
The 3rd pin RA4 communication connections of the chip U7 on road 101, the 3rd pin ground connection of the second Hall element U3, further include two
Hold the capacitance C4 being electrically connected respectively with the second pin of the second Hall element U3 and the 3rd pin.Wherein, the 3rd Hall member
The first pin VCC of part U4 connects the DC level of 12V, and the second pin OUT of the 3rd Hall element U4 passes through RSTP and institute
The 6th pin RC4 communication connections of the chip U7 of cpu control circuit 101 are stated, the 3rd pin of the 3rd Hall element U4 connects
Ground further includes the capacitance C3 that both ends are electrically connected respectively with the second pin of the 3rd Hall element U4 and the 3rd pin.
Wherein, the Hall element applied is when sensing a certain size magnetic field intensity, second pin and the 3rd pin
It connects, exports low level；It is not turned on during non-inductive magnetic field between second pin and the 3rd pin, exports high level.Three positions
Output inputs three pins of the chip U7 of the cpu control circuit 101 respectively, and the cpu control circuit 101 is according to these three
Whether the low and high level of pin judges the breaker in corresponding position.
Further, refering to Fig. 5, it is shown as the principle for the switching power circuit applied in the specific embodiment of the present invention
Structure diagram.The switching power circuit 106 include exchange input rectifying filter module, buffer module, PWM control modules,
Auxiliary power module, auxiliary feedback module, output rectification filter module, LDO Voltage stabilizing modules and AC/DC switch control modules.
Wherein, in figure, RV1 is varistor, absorbs surge energy, protects subsequent conditioning circuit in order to avoid being struck by lightning along bad.Two poles
Pipe D2 and capacitance C6 composition are described to exchange input rectifying filter module, and alternating current input power supplying is transformed into a stable dc power supply.
Resistance R9, capacitance C7, resistance R10 and diode D3 form the buffer module, the electricity of chip T1 when absorbing chip U5 shut-offs
Feel the flyback energy of NP1 and inductance NP2, protection U5 is in order to avoid along bad.Resistance R13, diode D4 and capacitance C8 form the auxiliary
Power module generates DC power supply to provide working power for the PWM chip U5 as PWM control modules.Resistance R14 and resistance
R15 forms the auxiliary feedback module, for chip U5 into line output voltage feedback regulation, ensures the stabilization of output voltage 12V.Electricity
The primary side operating current of R11 configuration switch power supplys is hindered, it is related with output power of power supply, it is carried out after being calculated according to actual loading situation
The selection of resistance value.Diode D5 and capacitance C10 forms the output rectification filter module, and the DC voltage for making output is more steady
It is fixed.Diode D6, capacitance C11, chip U6 and capacitance C12 form the LDO Voltage stabilizing modules, provide the cpu control circuit
101 3.3V power supplys.The diode D6 plays blocking, the discharge time that the 11.3V tension discharge times is made to be more than 12V.Electricity
The control circuit that R12 and capacitance C9 forms the switching power circuit 106 is hindered, specifically, the first end connection of resistance R12
PowerCN, and the 8th pin RC2 of the chip U7 of the cpu control circuit 101 is connected to PowerCN, works as PowerCN=0
When, the switching power circuit 106 works；As PowerCN=1, the switching power circuit 106 is stopped.In order to protect
Card Switching Power Supply after 10s delays at network voltage abnormal (power failure, decompression or overvoltage) exports 12V voltages to drive direct current
The load break switch of machine 105, so that breaker open operation, the present invention makes PowerCN=1 when measuring network voltage exception, closes
Switching Power Supply works.At this moment the high voltage direct current on capacitance C6 is always maintained at, when 10s delay to after, make PowerCN=0, open
Switching Power Supply works, and to export 12V power supplys, driving direct current generator 105 completes the sub-switching operation of breaker.The switch power supply
The circuit connection on road 106 specifically includes：The first end of the varistor RV1 is electrically connected with power grid input L lines, the pressure-sensitive electricity
The first end ground connection of RV1 is hindered, the first end of resistance R8 is electrically connected with power grid input L lines, the second end of resistance R8 and two poles
The anode electrical connection of pipe D2, the cathode of the diode D2 are electrically connected with the anode of the capacitance C6, the cathode of the capacitance C6
Ground connection, the first end of the resistance R9 are electrically connected with the cathode of the diode D2 and the first end of capacitance C7, resistance R9's
Second end is electrically connected with the first end of resistance R10 and the second end of capacitance C7, the second end of resistance R10 and the moon of diode D3
Pole is electrically connected, and the anode of diode D3 draws with the 6th of the second pin NP2 of chip T1, the 5th pin of chip U5 and chip U5
Foot is electrically connected, and the first end of capacitance C9 and the cathode of capacitance C8 are grounded, the second end of capacitance C9 and the second end electricity of resistance R12
Connection, and the second end of capacitance C9 is electrically connected with the second pin ZC of chip U5, the anode of capacitance C8 draws with the first of chip U5
Foot VDD is electrically connected, and the first end of resistance R11 is electrically connected with the 4th pin CS of chip U5, the second end ground connection of resistance R11, electricity
Hold cathode of the anode of C8 also with diode D4 to be electrically connected, the anode of diode D4 is electrically connected with the first end of resistance R13, resistance
The second end of R13 is electrically connected with the first end of resistance R14, and the second end of resistance R14 is electrically connected with the first end of resistance R15, electricity
The second end ground connection of R15 is hindered, the second end of resistance R13 is also electrically connected with the 4th pin NB2 of chip T1, the anode of diode D5
It is electrically connected with the 8th pin NS1 of chip T1, the cathode of diode D5 is electrically connected with the anode of capacitance C10, the cathode of capacitance C10
It being grounded with the 5th pin NS2 of chip T1, the first end of resistance R16 is electrically connected with the anode of diode D6, and the of resistance R16
Two ends are grounded, the anode output 12V level of diode D6, the level of the cathode output 11.3V of diode D6, the sun of capacitance C11
Pole is electrically connected with the cathode of diode D6, the minus earth of capacitance C11.The level of the first pin OUT outputs 3.3V of chip U6,
The level of the 11.3V of the cathode output of the second pin IN and diode D6 of chip U6 is electrically connected, the 3rd pin GND of chip U6
Ground connection, further includes a capacitance C12, and the first end of capacitance C12 is electrically connected with the first pin OUT of chip U6, and the second of capacitance C12
End ground connection.
Refering to Fig. 6, the theory structure for being shown as the cpu control circuit applied in the specific embodiment of the present invention is illustrated
Figure.Wherein, the 3.3V that the first pin VDD connections of the chip U7 of cpu control circuit 101 switching power circuit 106 exports
Power supply, the second pin RA5 of chip U7 communicated to connect by the second pin OUT of ONP and chip U2, and the 3rd of chip U7 draws
Foot RA4 is communicated to connect by the second pin OUT of OFFP and chip U3, and the 6th pin RC4 of chip U7 passes through OFFP and chip
The second pin OUT communication connections of U4, the first end communication link that the 8th pin RC2 of chip U7 passes through PowerCN resistance R12
It connects, the tenth pin RC0 of chip U7 is communicated to connect by the second end of ONC and resistance R2, and the 11st pin RA2 of chip U7 leads to
The second end for crossing OFFC and resistance R1 communicates to connect, and the 13rd pin AN0 of chip U7 is led to by the second end of ADV and resistance R6
Letter connection, the 14th pin ground connection of chip U7.
The cpu control circuit 101 is the core circuit of the breaker intelligence control system 100 of the present invention, to complete
The logic control of entire circuit, network voltage sampling calculates and drive and control of electric machine.The mains voltage signal input chip of sampling
The 13rd pin AN0 of U7 carries out digital sample with analog channel 0.Three position signals of breaker input chip U7 respectively
Second pin, the 3rd pin and the 6th pin, cpu chip U7 performs corresponding after judging the position signal collected
Action.OFFC and ONC is two motor drive signals of output, and control direct current generator 105 makes breaker open operation or combined floodgate.
PowerCN is used for controlling being turned on and off for switching power circuit 106.
Entire control logic be when detect network voltage decompression, it is under-voltage or over-pressed when, export PowerCN=1, closing is opened
Powered-down source is delayed after 10s, exports PowerCN=0, opens Switching Power Supply, and driving direct current generator 105 makes breaker open operation, completes
Power grid and the disconnection of load.Island effect is avoided to occur.When detecting that network voltage is normal, PowerCN=0 is exported, is opened
Switching Power Supply is delayed after 10s, and driving motor makes breaker closing, completes power grid and the connection of load.Use the CPU of the present invention
Circuit complexity and reliability can be substantially reduced after control.
In conclusion the breaker intelligence control system of the present invention includes cpu control circuit；Line voltage sample circuit,
It is electrically connected with the electric network source, and is electrically connected with the cpu control circuit；Circuit breaker position sample circuit is controlled with the CPU
Circuit electrical connection processed；Motor-drive circuit is electrically connected with the cpu control circuit；Direct current generator, with the motor-drive circuit
Electrical connection, and be connected with the breaker；Switching power circuit, with the cpu control circuit, circuit breaker position sampling electricity
Road, the motor-drive circuit and direct current generator electrical connection, and be the cpu control circuit, the circuit breaker position
Sample circuit, the motor-drive circuit and the direct current generator provide power supply.The present invention can detect utility grid in real time
No power failure, decompression or overvoltage.When detecting that utility grid has a power failure, decompression or automatically cuts off after certain time is delayed during overvoltage
Alternating current and load, make distributed grid-connected electricity generation system be separated with utility grid.When utility grid incoming call and normal voltage, automatically
Utility grid is cut and is loaded, and distributed grid-connected electricity generation system is connected to the grid.It solves distributed grid-connected electricity generation system to connect
When entering alternating current, the shortcomings that power grid is susceptible to island effect, promotes the stability and security of operation of power networks.So present invention
It effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (11)
1. a kind of breaker intelligence control system, which is characterized in that the breaker and a distributed grid-connected electricity generation system and
One electric network source is electrically connected, and the intelligence control system includes：
Cpu control circuit；
Line voltage sample circuit is electrically connected with the electric network source, and is electrically connected with the cpu control circuit；
Circuit breaker position sample circuit is electrically connected with the cpu control circuit；
Motor-drive circuit is electrically connected with the cpu control circuit；
Direct current generator is electrically connected with the motor-drive circuit, and is connected with the breaker；
Switching power circuit, with the cpu control circuit, the circuit breaker position sample circuit, the motor-drive circuit with
And the direct current generator electrical connection, and be the cpu control circuit, the circuit breaker position sample circuit, motor driving
Circuit and the direct current generator provide power supply.
2. breaker intelligence control system according to claim 1, it is characterised in that：The line voltage sample circuit is used
It is sampled in the electric network source, so that the cpu control circuit obtains sampled result.
3. breaker intelligence control system according to claim 2, it is characterised in that：The circuit breaker position sample circuit
It is sampled for the position to the breaker, the position of the breaker includes closing position and open position.
4. breaker intelligence control system according to claim 3, it is characterised in that：The cpu control circuit is used for will
The sampled result compared with a default normal voltage range,
When the sampled result belongs to the normal voltage range, open command is sent to the switching power circuit, makes institute
It states that Switching Power Supply is in running order, and continues to obtain the current location of the circuit breaker position sampling circuit samples, and work as institute
When stating current location and being not at the closing position, switching signal, the motor driving electricity are sent to the motor-drive circuit
Road sends reclosing command according to the switching signal to the direct current generator, and the direct current generator is made to be held according to the reclosing command
Row closing operation, the breaker to be made to be in the closing position, and then make the distributed grid-connected electricity generation system with it is described
Electric network source is connected；
When the sampled result exceeds the normal voltage range, out code is sent to the switching power circuit, makes institute
It states Switching Power Supply and is in stop working state, after the default delay time of delay, opened to described in switching power circuit transmission
Instruction is opened, and continues to obtain the current location of the circuit breaker position sampling circuit samples, and when the current location is not at
During the open position, sub-gate signal is sent to the motor-drive circuit, the motor-drive circuit is believed according to the separating brake
Number to the direct current generator send separating brake instruction, make the direct current generator according to the separating brake instruct perform sub-switching operation, with order
The breaker is in the open position, and then the distributed grid-connected electricity generation system is made to be disconnected with the electric network source.
5. breaker intelligence control system according to claim 4, it is characterised in that：The position of the breaker further includes
Clutch reset position；Wherein, the cpu control circuit is after the completion of the closing operation or sub-switching operation is judged, to institute
It states motor-drive circuit and sends reset signal, the motor-drive circuit is sent according to the reset signal to the direct current generator
Reset instruction resets operation so that the direct current generator to be made to be performed according to the reset instruction, and then the breaker is made to be in institute
State clutch reset position.
6. breaker intelligence control system according to claim 1, it is characterised in that：The motor-drive circuit includes driving
Dynamic chip U1, is electrically connected by the 7th pin INA and the 8th pin INB of the chip U1 with the cpu control circuit, and
It is electrically connected by the 4th pin OUTA and the 6th pin OUTB of the chip U1 with the direct current generator.
7. breaker intelligence control system according to claim 5, it is characterised in that：The circuit breaker position sample circuit
Including the first Hall element U2 being detected to the closing position, the second Hall member being detected to the open position
Part U3 and the 3rd Hall element U4 being detected to the clutch reset position.
8. breaker intelligence control system according to claim 1, it is characterised in that：The line voltage sample circuit bag
The diode D1 that halfwave rectifier is carried out to the electric network source is included, further includes the divider resistance being electrically connected with the diode D1,
The divider resistance is exported by output terminal to the CPU after being divided to the electric network source after the diode D1 rectifications
Control circuit.
9. breaker intelligence control system according to claim 8, it is characterised in that：The line voltage sample circuit is also
Including a filter capacitor, the first end ground connection of the filter capacitor, the second end of the filter capacitor is electrically connected with the output terminal
It connects.
10. breaker intelligence control system according to claim 1, it is characterised in that：The switching power circuit includes
Exchange input rectifying filter module, buffer module, PWM control modules, auxiliary power module, auxiliary feedback module, output rectification
Filter module, LDO Voltage stabilizing modules and AC/DC switch control modules.
11. breaker intelligence control system according to claim 10, it is characterised in that：The switching power circuit also wraps
A circuit protection module is included, the varistor that the circuit protection module is electrically connected by one with the electric network source forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433353.0A CN108063457A (en) | 2017-12-26 | 2017-12-26 | A kind of breaker intelligence control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433353.0A CN108063457A (en) | 2017-12-26 | 2017-12-26 | A kind of breaker intelligence control system |
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| CN108063457A true CN108063457A (en) | 2018-05-22 |
Family
ID=62140372
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| CN201711433353.0A Pending CN108063457A (en) | 2017-12-26 | 2017-12-26 | A kind of breaker intelligence control system |
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| CN109861198A (en) * | 2019-03-08 | 2019-06-07 | 广东美的制冷设备有限公司 | Fan power circuit, fan assembly and air conditioner |
| CN117641642A (en) * | 2024-01-26 | 2024-03-01 | 江西众一信息产业股份有限公司 | Single fire intelligent lighting switch circuit |
| CN117641642B (en) * | 2024-01-26 | 2024-05-17 | 江西众一信息产业股份有限公司 | Single fire intelligent lighting switch circuit |
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