CN107437849A - The online switch modulation digital communication control system of local power utilization network - Google Patents
The online switch modulation digital communication control system of local power utilization network Download PDFInfo
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- CN107437849A CN107437849A CN201710776490.8A CN201710776490A CN107437849A CN 107437849 A CN107437849 A CN 107437849A CN 201710776490 A CN201710776490 A CN 201710776490A CN 107437849 A CN107437849 A CN 107437849A
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- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 8
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Classifications
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- H02J13/0062—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses the online switch modulation digital communication control system of local power utilization network, including master network controller, from network controller.Master and slave network controller forms local communication network by supply line.Master network controller by information extraction electric circuit inspection and records the different instantaneous power-off pulse of pulsewidth to obtain information by controlling power switch to produce pulsewidth difference instantaneous power-off pulse in supply line to send information, from network controller.The present invention realizes that master network controller communicates with from the data between network controller according to the different data message of different pulsewidths representatives.Control mode of the present invention is succinct, long transmission distance, without the low beneficial effect of power consumption, cost, intelligent control can be realized to LED illumination and other electrical equipments.
Description
Technical field
The present invention relates to supply network control system, and in particular to the online switch modulation digital communication control of local power utilization network
System processed.
Background technology
The management of local power utilization network is the important management and control part in power utilization network management.With smart home, work
Industry Automated condtrol, the continuous development of Internet of Things remote information management, the market demand of the management of local power utilization network are more compeled
Cut.Under current techniques environment, GPRS is adopted in the network management of local electrical equipment more or corded power carrier wave is used for controlling a confession
The monitoring management of multiple electrical equipments in electric line, there is manufacturing cost height in which, number of devices is more, working service is cumbersome
And expense it is of a relatively high the problem of.
Patent No. CN201520416793 discloses a kind of local electrical equipment offline network management control system.This practicality
New to disclose a kind of local electrical equipment offline network management control system, the system includes a supply line, the confession
The power input top of electric line is in series with power control switch K1, the switch K1 and is connected in parallel to the offline net being serially connected
Network power source management controller and communication interface switch K2, and some electricity consumptions parallel with one another are also associated with the supply line
Device, each electrical appliance are connected to from network controller；The offline network power source management controller includes master network control
Device processed, the input of the master network controller are connected with power input interface, keyboard, internet interface and USB interface, institute
The output end for stating master network controller is connected with power output interface, data communication interface, display and warning lamp.The system
Artificial and automatic control switch power transmission function can be completed；Under off-line state prison is realized with carrying out data communication from one-chip computer
Control management function；It can be realized and the communication function of computer, mobile phone and internet by USB interface and internet interface.Should
Utility model communication function is single, can not meet the increasingly increased demand for control of electrical appliance.
Patent No. CN102118183A power carrier communication methods and device, comprise the following steps：Information gathering step, thing
Reason layer receives pilot signal to obtain channel condition information；Synchronization Status Message step, the physical layer and Data Transmission Controlling
The synchronous channel condition information of layer；Information handling step, according to the channel condition information, needed and can be communicated
Packet；Communication steps, the transmission of holding time section is described in turn needs and the packet that can communicate.Principle of Communication is complicated, makes
With inconvenience, poor practicability.
Therefore a kind of low cost is designed, control method is simple, is easy to basic unit technical staff to grasp the local power network used
Network communication control system turns into a kind of urgent requirement.
The content of the invention
The technical problem to be solved in the present invention is：Provide a kind of online switch modulation digital communication control of domain power utilization network
System, there is simple in construction, easy to operate, long transmission distance, communication efficiency height, the function that cost is low, practical.
The technical scheme of the technical problem to be solved in the present invention is：The online switch modulation digital communication control of local power utilization network
System processed, it is characterised in that：Including master network controller and from network controller.The master network controller is opened including power supply
Pass, drive control circuit, host microcontroller, power-off buffer circuit and the Internet of Things Network Communication mould with host microcontroller electrical connection
Block, keyboard, display unit, synchronized signal extracting circuit, main power source module.The power switch is serially connected in supply line
In, power-off buffer circuit is in series between the input and host microcontroller of the drive control circuit, drive control circuit
Output end and the control terminal of power switch are electrically connected, the main power source module and the power supply at the power network end of power switch input
Circuit is electrically connected, and the synchronized signal extracting circuit and the supply line of power switch output end rear end are electrically connected.
It is described to include from network controller from microcontroller, synch information extraction circuit, from power module, slave control unit, it is described
It is electrically connected from microcontroller and synch information extraction circuit, from power module, slave control unit, the synchronizing information input
Circuit, supply line's electrical connection from power module Yu power switch output end rear end.
Preferably, the supply line is Alternating Current Power Supply power network.
Preferably, the synchronized signal extracting circuit includes the first current-limiting resistance, the second current-limiting resistance, the first rectification
Bridge, the first photoelectrical coupler, the ac input end of first rectifier bridge and the supply line of power switch output end rear end
0th, the first current-limiting resistance, the second current-limiting resistance, the DC output end series resistor of the first rectifier bridge are in series between live wire respectively
The positive and negative electrode with the first photoelectrical coupler input is electrically connected afterwards, and the emitter-base bandgap grading output pin of the first photoelectrical coupler and master are micro-
Controller is electrically connected, and colelctor electrode and the positive source of the first photoelectrical coupler are electrically connected.
Preferably, the synch information extraction circuit includes third and fourth current-limiting resistance, the second rectifier bridge, the second photoelectricity coupling
Clutch, the ac input end of second rectifier bridge and the supply line of power switch output end rear end zero, between live wire point
Be not in series with the 3rd current-limiting resistance, the 4th current-limiting resistance, after the DC output end series resistor of the second rectifier bridge with the second photoelectricity
The positive and negative electrode electrical connection of coupler input, the emitter-base bandgap grading output pin of the second photoelectrical coupler from microcontroller with electrically connecting
Connect, colelctor electrode pin and the positive source of the second photoelectrical coupler are electrically connected.
Preferably, described from power module is Switching Power Supply, and the Switching Power Supply is provided with energy-storage travelling wave tube, Switching Power Supply it is defeated
Enter the supply line of end and power switch output end rear end zero, live wire electrical connection, from power module outlet with from micro-control
Device processed electrical connection, the energy-storage travelling wave tube is ensureing the moment in supply line's power-off from one section of network controller normal work
Time.
Preferably, the power switch is contactor, and the normally opened contact of power switch is serially connected in supply line and connected with power network
The zero line electrical connection of the one end connect, coil windings one end of power switch and the supply line of power switch input front end.
Fire after the coil windings other end concatenation drive control circuit of power switch with the supply line of power switch input front end
Line is electrically connected.
Preferably, the switch driving circuit includes optocoupler, the five, the six resistance, electric capacity and controllable silicon.The optocoupler
Input and power-off buffer circuit electrical connection, the first end of output end of the five, the six resistant series in optocoupler and controllable
Between first main electrode of silicon, the second end of the output end of optocoupler and the gate pole of controllable silicon are electrically connected, one end of the electric capacity
It is electrically connected with the second main electrode of controllable silicon, the other end of electric capacity is connected between the five, the six resistance, and the one of the controllable silicon
Concatenate the coil windings of power switch between individual main electrode and the zero line of the supply line of power switch front end, controllable silicon it is another
Main electrode and the live wire of the supply line of power switch front end are electrically connected.
Preferably, it is described power-off buffer circuit include the 7th resistance, first and second diode, the second electric capacity, the 3rd electric capacity,
First and second triode, the eight, the nine, ten resistance.One end of 7th resistance as start electric signals control terminal, to
The base stage of the microcontroller electrical connection of master network controller, the other end of the 7th resistance and the first triode is electrically connected, the
The colelctor electrode electrical connection of two triodes, the anode electrical connection of the first diode, the negative electrode of first and second diode simultaneously connect
As power failure pulse signal control terminal, to connect the host microcontroller of master network controller, the anode of first diode
The colelctor electrode electrical connection of base stage with the first triode, the second triode respectively, the anode of the second diode and the two or three pole
The 9th resistance is serially connected between the base stage of pipe, the 8th is serially connected between the anode of the second diode and the colelctor electrode of the first triode
The 3rd electric capacity is serially connected between the emitter stage of resistance, the anode of the second diode and the second triode, second triode
Grounded emitter, one end of the tenth resistance and the positive pole of the second electric capacity simultaneously connect the positive pole VDD electrical connections with power supply afterwards, the
Two electric capacity negative pole ground connection, concatenate optocoupler between the other end of the tenth resistance and the colelctor electrode of the first triode, to
Drive control circuit, the grounded emitter of the first triode.
The communication party of the online switch modulation digital communication control system of local power utilization network according to claim 1
Method, it is characterised in that comprise the following steps：
Step 1, master network controller obtain control instruction, and the method for obtaining control instruction has：1.1, by keyboard and show
Show that control instruction is transferred in the microcontroller of master network controller by unit；1.2, by Internet of Things communication module, will control
Instruction is sent in the microcontroller of master network controller by computer or mobile phone；
Step 2, data modulation, it is specially：
Host microcontroller control power switch produces an instantaneous power-off pulse, the width of power failure pulse in supply line
The data length of symbol is represented, because the data length of each different therefore corresponding symbol of pulse width is also different, according to
Enter the coding of row information according to different symbol data length；
Obtained control instruction is converted into one group of symbol data by host microcontroller, then compiles this group of symbol data
Into the driver for producing different instantaneous power-off pulse widths, driving pulse is passed to drive control electricity by host microcontroller again
Road；
Step 3, the drive control circuit of master network controller control power switch to produce according to the instruction of host microcontroller
One group of instantaneous power-off pulse；
Step 4, data demodulation, it is specially：
Instantaneous power-off pulse is detected from network controller by synch information extraction circuit, and passes through the second photoelectrical coupler
Emitter-base bandgap grading output pin pass to from network controller from microcontroller, calculated from network controller from microcontroller instantaneous
The width of power failure pulse；
The single instantaneous power-off pulse information detected is converted into one group from microcontroller carried from network controller
The symbol of data message, and decoded according to default communication protocol, generate control instruction；
Step 5, from network controller from microcontroller control instruction is sent to from control unit, from control unit root
PWM and switch control information are produced according to control instruction to realize the control to electrical equipment.
The beneficial effects of the present invention are：
1st, the invention realizes communication by producing instantaneous power-off pulse in supply line, has and simplifies power supply and order wire
The beneficial effect on road；
2nd, the communication mode of the invention, which has, controls simple, long transmission distance, the beneficial effect not influenceed by line impedance
Fruit；
3rd, the invention realizes that the transmission of information has beneficial effect low in energy consumption by producing instantaneous power-off pulse；
4th, invention tool only needs to add master-slave network controller in supply line, has installation easily beneficial
Effect；
5th, the present invention has the characteristics of practical, applied widely, available for intelligent lighting, smart home, industry certainly
The fields such as dynamicization control.
Brief description of the drawings
Fig. 1 is the system construction drawing of the online switch modulation digital communication control system of local power utilization network of the present invention,
Fig. 2 is the electricity of the master network controller of the online switch modulation digital communication control system of local power utilization network of the present invention
Line structure figure,
Fig. 3 is the electricity from network controller of the online switch modulation digital communication control system of local power utilization network of the present invention
Line structure figure,
Fig. 4 is the electricity of the master network controller of the online switch modulation digital communication control system of local power utilization network of the present invention
Source switch, drive control circuit, the circuit structure diagram for powering off buffer circuit,
Fig. 5 is that the master-slave network controller of the online switch modulation digital communication control system of local power utilization network of the present invention is real
The schematic diagram now to communicate.
In figure：
1st, supply line, 2, master network controller, 21, power switch, 22, drive control circuit, 23, synchronized signal
Extract circuit, 24, power-off buffer circuit, 25, Internet of Things communication module, 26, keyboard, 27 display units, 3, from network controller,
31st, synchronizing information input circuit, 32, from control unit, 41, host microcontroller, 42, from microcontroller, 51, main power source module,
52nd, from power module.
Embodiment
To make technical scheme and beneficial effect clearer, embodiments of the present invention are done below further
Explain in detail.
As shown in figure 1, the online switch modulation digital communication control system of local power utilization network, including master network controller 2
With from network controller 3.Master and slave network controller 2,3 is connected by supply line 1, and forms the communication of local power utilization network
System.Preferably, supply line 1 is the single supply supply network of alternating current 220V, including a zero line and a live wire.Supply lines
The one end on road 1 is connected with mains-supplied power network, and master network controller 2 is arranged in supply line 1 close to mains-supplied power network
One end, it is provided with multiple from network controller 3 and is attempted by supply line 1.Master and slave network controller 2,3 can pass through master network
Controller 2, a local communication network realization communication is constituted from network controller 3 and supply line 1.
Master network controller 2 is the maincenter of whole system, is the person of sending of control command.As shown in Fig. 2 master network controls
Device 2 includes power switch 21, drive control circuit 22, host microcontroller 41, power-off buffer circuit 24 and and host microcontroller
The Internet of Things communication module 25 of 41 electrical connections, keyboard 26, display unit 27, synchronized signal extracting circuit 23, main power source
Module 51.In order to prevent influence of the instantaneous power-off pulse to master network controller 2, main power source module 51 inputs with power switch 21
The zero of front-end power circuit 1, live wire is held to be electrically connected, i.e. the confession of main power source module 51 and Switching Power Supply 21 close to one end of power network
Electric line 1 is electrically connected.The output end and host microcontroller 41 of main power source module 51 are electrically connected to master network controller 2
Power supply is provided.Keyboard 26, display unit 27, the Internet of Things Network Communication being electrically connected with the host microcontroller 41 of master network controller 2
Module 25 is realizing the acquisition of control instruction.Keyboard 26 and display unit 27 are realizing that the instruction of the display of data is defeated
Enter, the instruction on computer or mobile phone is delivered to master network control by Internet of Things communication module 25 to realize by way of communication
On the host microcontroller 41 of device 2 processed.Internet of Things communication module 25 is a kind of communication module for connecting terminal device and internet, it
The information of terminal device is passed on internet in order to being controlled by mobile phone and computer.
The master network controller 2 of the system in supply line 1 by producing the different instantaneous power-off of a pulse width
Pulse passed information to as the carrier of information be connected in supply line 1 from network controller 3.Therefore master network control
Device 2 needs a controllable switching device to be arranged in supply line 1, and the switching device is exactly power switch 21.Therefore by electricity
Source switch 21 is connected on one end of supply line 1 and mains-supplied power network, to realize instantaneous power-off pulse in supply line 1
Produce.In the prior art, contactor, relay can serve as power switch 21, with the development of Power Electronic Technique, make
Break-make control and a kind of more conventional mode are realized with components such as high-power two-phase IGCT, IGBT.
Preferably, as shown in figure 4, power switch 21 realizes the control of instantaneous power-off using contactor.Contactor is provided with
Normally closed, normally opened contact and coil windings.Have a power failure to realize, the normally opened contact of control relay be connected on mains-supplied network and
Between supply line 1, i.e., in the supply line 1 of all rear ends that the output end of power switch 21 is arranged on from network controller 3.
Preferably, the rated voltage of the coil windings of contactor is alternating current 220V.Therefore by one end of the coil windings of contactor and electricity
The zero line electrical connection of the supply line 1 of the grid side of source switch 21, other end concatenation drive control circuit 22 and power switch 21
The live wire electrical connection of the supply line 1 of supply line 1 of grid side.
Because power switch 21 is connected in 220V supply lines 1, if host microcontroller 41 directly controls power supply to open
21 are closed, interference can be produced or even the phenomenon of the scaling loss of host microcontroller 41 occurs, therefore power switch 21 needs a drive control
Circuit 22 realizes the isolation of strong and weak electricity.The control instruction driving power that drive control circuit 22 is sent according to host microcontroller 41
Switch 21 realizes the break-make of supply line 1.
Preferably, in order to realize energization and power-off of the drive control circuit 22 to the contactor coil winding of power switch 21
Control, drive control circuit 22 uses controllable silicon SCR as noncontacting switch.In order to realize and 220V mains-supplied networks
Isolation ensures the safety of master network controller 2, and optocoupler V3 is provided with drive control circuit 22.Drive control circuit 22 also wraps
Include the five, the six resistance R5, R6 and electric capacity C31.Optocoupler V3 input is to the electricity of host microcontroller 41 with master network controller 2
Gas connects.In the present invention, in order to ensure the safety from network controller 3, in host microcontroller 41 and drive control circuit 22
Between connected power-off buffer circuit 24, therefore the output end electrical connection of optocoupler V3 input and power-off buffer circuit 24.
The five, the six resistance R5, R6, optocoupler are in series between the first end of optocoupler V3 output end and the first main electrode of controllable silicon SCR
Second end of V3 output end and the gate pole of controllable silicon SCR are electrically connected, to drive the break-make of controllable silicon SCR.Electric capacity C31's
One end and the five, the six resistance R5, R6 tie point are electrically connected, the electric capacity C31 other end and the second main electrode of controllable silicon SCR
Electrical connection.First and second main electrode of controllable silicon SCR is controlling the coil windings of the contactor of power switch 21, you can control
One end of silicon SCR the first main electrode and the coil windings of power switch 21 is electrically connected, another main electrode and power switch 21
The electrical connection of the supply line 1 of input front end.
Preferably, in order to verify whether the control instruction that master network controller 2 is sent is correct, in master network controller 2
There is provided synchronized information extraction circuit 23.Synchronized information extraction circuit 23 to will be in supply line 1 instantaneous stop
Electric impulse signal, which is acquired and changed, to be then passed to the host microcontroller 41 of master network controller 2 and is handled.Power network is same
Walking signal extracting circuit 23 includes the first current-limiting resistance R1, the second current-limiting resistance R2, the first rectifier bridge BD1, the first photoelectric coupling
Device V1, the first current limliting is in series between the ac input end of the first rectifier bridge BD1 and the zero of supply line 1, live wire respectively
Resistance R1, the second current-limiting resistance R2, between the first rectifier bridge BD1 DC output end and the first photoelectrical coupler V1 both positive and negative polarity
Resistance is in series with, the first photoelectrical coupler V1 emitter-base bandgap grading output pin electrically connects with the host microcontroller 41 of master network controller 2
Connect.
Because power network has the phenomenon having a power failure in control process, due to the reclosing defencive function of power supply grid, meeting
The phenomenon of power transmission, the of short duration off interval of power network can make to occur that power-off is shut down from network controller 3 immediately after appearance power-off,
And certain initialization time is needed from restarting for network controller 3, in order to prevent that power network is quick again powered to from network control
The influence that device 3 processed is restarted, the power switch 21 in master network controller 2 is locked after grid cut-off, wait it is certain it
Between after the normal work from the circuit of network controller 3 is protected with this carrying out power transmission to supply line 1.Therefore in drive control
Connected between circuit 22 and microcontroller 41 power-off buffer circuit 24.
Preferably, powering off buffer circuit 24 includes the 7th resistance R7, first and second diode D1, D2, the second electric capacity C2, the
Three electric capacity C3, first and second triode Q1, Q2, the eight, the nine, ten resistance R8, R9, R10.
7th resistance R7 one end is as start electric signals control terminal, to be electrically connected with host microcontroller 41.The
The seven resistance R7 other end base stage with the first triode Q1 respectively, to drive the first triode Q1 conducting.First and second 2
The negative electrode of pole pipe D1, D2 is simultaneously used as instantaneous power-off pulse signal control terminal after connecing, to connect host microcontroller 41.One or two
The colelctor electrode electrical connection of pole pipe D1 anode and the first triode Q1 base stage, the second triode Q2.Second diode D2's
The 9th resistance R9 is serially connected between anode and the second triode Q2 base stage.Second diode D2 anode and the first triode Q1
Colelctor electrode between be serially connected with the 8th resistance R8.Concatenated between second diode D2 anode and the second triode Q2 emitter stage
There is the 3rd electric capacity C3.Second triode Q2 grounded emitter.First triode Q1 grounded emitter.Tenth resistance R10's
One end and the second electric capacity C2 positive pole simultaneously connect the positive pole VDD electrical connections with power supply afterwards.Second electric capacity C2 negative pole ground connection.Tenth
Output end of the resistance R10 other end and the first triode Q1 colelctor electrode as control signal.Tenth resistance in the invention
The optocoupler V3 of the R10 other end and the first triode Q1 colelctor electrode tandem drive control circuit 22, to electric with drive control
Controllable silicon SCR in road 22.
The input of the host microcontroller 41 of master network controller 2 and power-off buffer circuit 24 is electrically connected, power-off buffering
The output end of circuit 24 and the input electrical connection of drive control circuit 22, the output end and power supply of drive control circuit 22 are opened
Close 21 input electrical connection.Its operation principle is as follows：
1st, from the startup of network controller 3.From powering off buffer circuit 24 in master network controller circuit diagram 4, when opening
When machine signal control terminal is high level, the first triode Q1 conductings, the second triode Q2 cut-offs, optocoupler V3 is by driving conducting, light
Controllable silicon SCR conducting is controlled after coupling V3 conductings, the contactor coil winding of power switch 21 is powered to make the adhesive of power switch 21, from
And make to start from network controller 3 to supply line 1 is powered.
2nd, from the protection of network controller 3.Due to energy-storage travelling wave tubes such as the capacitor and inductor out of network controller 3 and chips
After needing the regular hour to carry out discharge reduction after a loss of power, it can normally start work from network controller 3.According to Fig. 4
The circuit structure of middle power-off buffer circuit 24 understands that after there is stopping signal, i.e. starting-up signal control terminal has high level to be changed into
During low level, power vd D dead electricity.The electric energy of now electric capacity C2 storages is through the tenth resistance R10, optocoupler V3, the 8th resistance R8, the 9th
Resistance R9, the second triode Q2 base stages are discharged over the ground, and drive the second triode Q2 conductings by the first triode Q1 base potentials
Drag down and the first triode Q1 is pinned with this kept it turned off, because optocoupler V3 is current drive-type, the electric energy of electric capacity C2 storages passes through
Eight, the nine resistance R8, R9 resistances make more greatly optocoupler V3 input current very little cause the output end cut-off for driving optocoupler V3, two-way
Controllable silicon loses trigger signal and ends control power switch 21 and discharge, when starting shooting high level signal as added again during this period
Pinning is dragged down because the first triode Q1 base potentials are turned on by the second triode Q2, therefore can not be started shooting in a period of time, is risen
To protection from the effect of the power-off restoration of network controller 3.Treat that electric capacity C2 discharge offs make the second triode Q2 have conducting to be changed into cutting
Only and to the first triode Q1 base stages unlock.Therefore after preventing personnel continuously to press start button and supply network power-off
Reclosing is to the influence from network controller 3.
3, the generation of instantaneous power-off pulse.When starting-up signal control terminal is high level in power-off buffer circuit 24, power supply is opened
Close 21 and be in closure state.When instantaneous power-off pulse signal occurs, the main control terminal of micro controller 41 passes through first and second diode
D1, D2 export a low level pulse signal, therefore by the voltage pull-down of the first triode Q1 base stage, make the first triode Q1
Shut-off, and control power switch 21 to disconnect by drive control circuit 22, i.e. instantaneous power-off pulse starts.Simultaneously because the 2nd 2
The voltage pull-down of second triode Q2 base stage turns off the second triode Q2, during power failure pulse by pole pipe D2 effect
Effectively relieve power-off protection function, when power failure end-of-pulsing be the main control terminal of micro controller 41 by first and second diode D1,
D2 outputs have low level to turn on the first triode Q1 when switching to high level, and control the bidirectional triode thyristor of drive control circuit 22
SCR conductings and driving power switch 21 adhesives, the generation process of one instantaneous power-off pulse of completion.The instantaneous power-off burst length is
More than ten milliseconds.
Master network controller 2 is to send data or control instruction, from network controller 3 receiving data and control
Instruction.As shown in figure 3, from network controller 3 include from microcontroller 42, synch information extraction circuit 31, from power module 52,
Slave control unit 32.It is the basic circuit run from network controller 3 from microcontroller 42 and from power module 52.Synchronous letter
Breath extracts circuit 31 the instantaneous power-off pulse signal in supply line 1 is acquired and changed and passed to from microcontroller
Device 42.From control unit 32 performing the control instruction obtained from network controller 3 in supply line 1.
Preferably, synch information extraction circuit 31 includes third and fourth current-limiting resistance R3, R4, the second rectifier bridge BD2, second
Photoelectrical coupler V2, is in series between the ac input end of the second rectifier bridge BD2 and the zero of supply line, live wire respectively
Three current-limiting resistance R3, the 4th current-limiting resistance R4, the second rectifier bridge BD2 DC output end and the second photoelectrical coupler V2 both positive and negative polarities
Between be in series with resistance, to the second photoelectrical coupler V2 current limlitings.Second photoelectrical coupler V2 emitter-base bandgap grading output pin with from
Network controller 3 is electrically connected from microcontroller 42, to pass to from microcontroller 42 instantaneous power-off pulse signal
The processing of row data.
Preferably, it is disconnected from network controller 3 in order to prevent from instantaneous power-off pulses generation causing from network controller 3
Electricity, in the Switching Power Supply that energy-storage travelling wave tube is carried from power module 52 from network controller 3.From the input of power module 52 and
The supply line 1 of the output end rear end of power switch 21 zero, live wire electrical connection, from the output end of power module 52 with from micro-
Controller 42 is electrically connected.Energy-storage travelling wave tube to ensure supply line 1 power off moment being capable of normal work from network controller 3
Make.Preferably, in the prior art, more conventional energy-storage travelling wave tube is electrochemical capacitor, and two electrodes of electrochemical capacitor are attempted by
The output end of Switching Power Supply, after the alternating current dead electricity of Switching Power Supply, the electric energy of electrochemical capacitor memory storage is given from network controller 3
In each element provide power supply.The control system data-transmission mode is not applied only in ac distribution network, can also be applied
In DC suppling network.
Above is the description of the structure of the online switch modulation digital communication control system of local area power utilization network, below to this
The master and slave network controller 2,3 of system realizes that the specific method of communication is described.As shown in figure 5, its method includes following step
Suddenly：
Step 1, master network controller 2 obtain control instruction.The method for obtaining control instruction has：
1.1, control instruction is input to the host microcontroller 41 of master network controller 2 by keyboard 26 and display unit 27
In；
1.2, by Internet of Things communication module 25, control instruction is sent to master network controller by computer or mobile phone
In 2 host microcontroller 41；
Step 2, data modulation.Specially：
Host microcontroller 41 controls power switch 21 to produce single instantaneous power-off pulse, power failure pulse in supply line 1
Width represent the data length of symbol, due to each different therefore corresponding symbol of pulse width data length not yet
Together, the coding of row information is entered according to different symbol data length；
Obtained control instruction is converted into one group of symbol data by host microcontroller 41, then turns this group of symbol data
Change the driver for producing different instantaneous power-off pulses into, driving pulse is passed to drive control circuit by host microcontroller 41 again
22。
Step 3, the drive control circuit 22 of master network controller 2 control power switch according to the instruction of host microcontroller 41
21 produce instantaneous power-off pulse information in supply line 1.
Step 4, data demodulation.Specially：
Instantaneous power-off pulse is detected from network controller 3 by synch information extraction circuit 31, and passes through the second photoelectricity coupling
Clutch V2 emitter-base bandgap grading output pin is passed to from network controller 3 from microcontroller 42, from network controller 3 from microcontroller
Device 42 calculates the width of instantaneous power-off pulse；
The single instantaneous power-off pulse information detected is converted into one from network controller (3) from microcontroller (42)
Symbol of the group with data message, and decoded according to default communication protocol, generate control instruction；
Step 5, from network controller 3 from microcontroller 42 control instruction is sent to from control unit 32, from control
Unit 32 produces the control information such as PWM and switch and to the control of electrical equipment according to control instruction.
In summary, only presently preferred embodiments of the present invention, not it is used for limiting the scope of the present invention, by above-mentioned
Description, relevant staff can carry out various change without departing from the scope of the technological thought of the present invention' completely
More and change.The technical scope of the present invention is not limited to the content on specification, all claimed range institutes under this invention
The shape stated, construction, feature and the so-called equivalent changes and modifications of spirit, all should include and scope of the presently claimed invention
It is interior.
Claims (9)
1. the online switch modulation digital communication control system of local power utilization network, it is characterised in that：
Including master network controller (2) and from network controller (3),
The master network controller (2) includes power switch (21), drive control circuit (22), host microcontroller (41), power-off
Buffer circuit (24) and the Internet of Things communication module (25) being electrically connected with host microcontroller (41), keyboard (26), display list
First (27), synchronized signal extracting circuit (23), main power source module (51),
The power switch (21) is serially connected in supply line (1), input and the main micro-control of the drive control circuit (22)
Power-off buffer circuit (24), the output end of drive control circuit (22) and the control of power switch (21) are in series between device (41) processed
End electrical connection processed, the main power source module (51) and the supply line (1) at the power network end of power switch (21) input are electric
Connection, the synchronized signal extracting circuit (23) and the supply line (1) of power switch (21) output end rear end electrically connect
Connect,
It is described to include from network controller (3) from microcontroller (42), synch information extraction circuit (31), from power module
(52), slave control unit (32), it is described from microcontroller (42) and synch information extraction circuit (31), from power module
(52), slave control unit (32) is electrically connected, and the synchronizing information input circuit (31), is opened from power module (52) with power supply
Close supply line (1) electrical connection of (21) output end rear end.
2. the online switch modulation digital communication control system of local power utilization network according to claim 1, its feature in：
The supply line (1) is Alternating Current Power Supply power network.
3. the online switch modulation digital communication control system of local power utilization network according to claim 1, it is characterised in that：
The synchronized signal extracting circuit (23) includes the first current-limiting resistance (R1), the second current-limiting resistance (R2), first whole
Bridge (BD1), the first photoelectrical coupler (V1) are flowed, the ac input end and power switch (21) of first rectifier bridge (BD1) are defeated
Go out to hold the zero of the supply line (1) of rear end, be in series with the first current-limiting resistance (R1), the second current-limiting resistance respectively between live wire
(R2), the positive and negative electrode after the DC output end series resistor of the first rectifier bridge (BD1) with the first photoelectrical coupler (V1) input
Electrical connection, emitter-base bandgap grading output pin and the host microcontroller (41) of the first photoelectrical coupler (V1) are electrically connected, the first photoelectricity coupling
The colelctor electrode of clutch (V1) is electrically connected with positive source.
4. the online switch modulation digital communication control system of local power utilization network according to claim 1, it is characterised in that：
The synch information extraction circuit (31) includes third and fourth current-limiting resistance (R3, R 4), the second rectifier bridge (BD2), second
Photoelectrical coupler (V2), the ac input end of second rectifier bridge (BD2) and the power supply of power switch (21) output end rear end
Circuit (1) zero, be in series with the 3rd current-limiting resistance (R3), the 4th current-limiting resistance (R4), the second rectifier bridge respectively between live wire
(BD2) positive and negative electrode after DC output end series resistor with the second photoelectrical coupler (V2) input is electrically connected, the second light
The emitter-base bandgap grading output pin of electric coupler (V2) from microcontroller (42) with being electrically connected, the colelctor electrode of the second photoelectrical coupler (V2)
Pin is electrically connected with positive source.
5. the online switch modulation digital communication control system of local power utilization network according to claim 1, it is characterised in that：
Described from power module (52) is Switching Power Supply, and the Switching Power Supply is provided with energy-storage travelling wave tube, the input of Switching Power Supply and
The supply line (1) of power switch (21) output end rear end zero, live wire electrical connection, from power module (52) output end with from
Microcontroller (42) is electrically connected, and the energy-storage travelling wave tube is ensureing the moment in supply line (1) power-off from network controller
(3) normal operation.
6. the online switch modulation digital communication control system of local power utilization network according to claim 1, it is characterised in that:
The power switch (21) is contactor, and the normally opened contact of power switch (21) is serially connected in supply line (1) and connected with power network
The zero line of the one end connect, coil windings one end of power switch (21) and the supply line (1) of power switch (21) front end is electric
Connection, coil windings other end concatenation drive control circuit (22) confession with power switch (21) front end afterwards of power switch (21)
The live wire electrical connection of electric line (1).
7. the online switch modulation digital communication control system of local power utilization network according to claim 6, it is characterised in that:
The switch driving circuit (22) includes optocoupler (V3), the five, the six resistance (R5, R6), electric capacity (C31) and controllable silicon
(SCR), the input of the optocoupler (V3) and power-off buffer circuit (24) electrical connection, the five, the six resistance (the R5, R6) string
It is associated between the first end of the output end of optocoupler (V3) and the first main electrode of controllable silicon (SCR), the output end of optocoupler (V3)
Second end and the gate pole of controllable silicon (SCR) are electrically connected, one end of the electric capacity (C31) and the second main electricity of controllable silicon (SCR)
Pole is electrically connected, and the other end of electric capacity (C31) is connected between the five, the six resistance (R5, R6), and the one of the controllable silicon (SCR)
The coil windings of power switch (21) are concatenated between individual main electrode and the zero line of the supply line (1) of power switch front end, it is controllable
Another main electrode of silicon (SCR) and the live wire of the supply line (1) of power switch (21) front end are electrically connected.
8. the online switch modulation digital communication control system of local power utilization network according to claim 7, it is characterised in that:
The power-off buffer circuit (24) includes the 7th resistance (R7), first and second diode (D1, D2), the second electric capacity (C2), the
Three electric capacity (C3), first and second triode (Q1, Q2), the eight, the nine, ten resistance (R8, R9, R10),
One end of 7th resistance (R7) is as start electric signals control terminal, to micro- with the master of master network controller (2)
Controller (41) is electrically connected, the other end of the 7th resistance (R7) and the base stage of the first triode (Q1), the second triode (Q2)
Colelctor electrode, the first diode (D1) anode electrical connection, the negative electrode of first and second diode (D1, D2) simultaneously connects conduct
Power failure pulse signal control terminal, to connect the host microcontroller of master network controller (2) (41), first diode (D1)
Anode and the base stage of the first triode (Q1), the colelctor electrode of the second triode (Q2) be electrically connected, the second diode (D2)
The 9th resistance (R9), the anode and the one or three of the second diode (D2) are serially connected between the base stage of anode and the second triode (Q2)
It is serially connected with the 8th resistance (R8) between the colelctor electrode of pole pipe (Q1), the anode of the second diode (D2) and the second triode (Q2)
The 3rd electric capacity (C3), the grounded emitter of second triode (Q2), the tenth resistance (R10) are serially connected between emitter stage
One end and the positive pole and connecing of the second electric capacity (C2) be electrically connected afterwards with the positive pole VDD of power supply, the negative pole of the second electric capacity (C2) connects
Ground, optocoupler (V3) is concatenated between the other end of the tenth resistance (R10) and the colelctor electrode of the first triode (Q1), to control
Drive control circuit (22), the grounded emitter of the first triode (Q1).
9. the communication means of the online switch modulation digital communication control system of local power utilization network according to claim 1,
It is characterized in that comprise the following steps：
Step 1, master network controller (2) obtain control instruction, and the method for obtaining control instruction has：
1.1, control instruction is transferred to the host microcontroller of master network controller (2) by keyboard (26) and display unit (27)
(41) in；
1.2, by Internet of Things communication module (25), control instruction is sent to master network controller by computer or mobile phone
(2) in host microcontroller (41)；
Step 2, data modulation, it is specially：
Host microcontroller (41) control power switch (21) produces an instantaneous power-off pulse, power failure arteries and veins in supply line (1)
The width of punching represents the data length of symbol, due to the data length of each different therefore corresponding symbol of pulse width
Difference, the coding of row information is entered according to different symbol data length；
Obtained control instruction is converted into one group of symbol data by host microcontroller (41), then compiles this group of symbol data
Into the driver for producing different instantaneous power-off pulse widths, driving pulse is passed to drive control by host microcontroller (41) again
Circuit (22)；
Step 3, the drive control circuit (22) of master network controller (2) control power supply to open according to the instruction of host microcontroller (41)
Close (21) and produce one group of instantaneous power-off pulse；
Step 4, data demodulation, it is specially：
Instantaneous power-off pulse is detected from network controller (3) by synch information extraction circuit (31), and passes through the second photoelectricity coupling
The emitter-base bandgap grading output pin of clutch (V2) is passed to from network controller (3) from microcontroller (42), from network controller (3)
The width of instantaneous power-off pulse is calculated from microcontroller (42)；
Detect one group of instantaneous power-off pulse information is converted into one group of band from network controller (3) from microcontroller (42)
There is the symbol of data message, and decoded according to default communication protocol, generate control instruction；
Step 5, from network controller (3) from microcontroller (42) control instruction is sent to from control unit (32), from control
Unit (32) processed produces PWM according to control instruction and switchs control of the control information realization to electrical equipment.
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