CN108008178A - Wireless multifunctional power network signal Transmission system - Google Patents
Wireless multifunctional power network signal Transmission system Download PDFInfo
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- CN108008178A CN108008178A CN201711209956.2A CN201711209956A CN108008178A CN 108008178 A CN108008178 A CN 108008178A CN 201711209956 A CN201711209956 A CN 201711209956A CN 108008178 A CN108008178 A CN 108008178A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention relates to a kind of wireless multifunctional power network signal Transmission system,Including collection lateral circuit and receive lateral circuit,Collection lateral circuit includes Current Voltage interface,Power network signal sample circuit,Power network signal process circuit,Gather side CPU,RF wireless sending modules,Power grid phase sequence sets circuit,Power circuit,Collection lateral circuit, which can be realized, gathers the precision of electric network data,User can also set the collection to any phase in power grid three-phase,Receiving lateral circuit includes GPRS wireless transport modules,RF wireless receiving modules,RS485 modules,CAN module,Receiving side CPU,Keyboard input module,Power module,Display panel module,Receive a variety of transmission modes of the lateral circuit realization to electric network data,Improve circuit flexibility,RF wireless sending modules realize collection lateral circuit with RF wireless receiving modules wireless communication and receive the communication of lateral circuit,Greatly reduce the harness of signal transmission,Reduce system cost and cost of labor.
Description
Technical field
Of the invention and a kind of power network signal wireless transmitting system, more particularly to a kind of wireless multifunctional power network signal transmission system
System.
Background technology
Traditional digital display meter collection power network signal is adopted by accessing 220V power supplys or three-phase and four-line Current Voltage harness
Sample, not only circuit is complicated for such wiring, but also considerably increases construction cost and system cost, if complicated harness arranges
It is improper or even safety problem can be caused.Need to carry out circuit reactive-load compensation in some power distribution cabinets and carried out with computer
Data interaction, power distribution cabinet will set signal corresponding thereto transmission line.But user is not by power distribution cabinet or by computer
It cannot check the Various types of data of power grid, user cannot be notified at the first time emergency occurs, it is extremely inconvenient.
The content of the invention
In view of this, it is an object of the invention to provide one kind can realize power network signal be wirelessly transferred, electric network data it is a variety of
The wireless multifunctional power network signal Transmission system that transmission mode, sampling precision are high, circuit flexibility is good.
In order to realize the above object the present invention uses such a wireless multifunctional power network signal Transmission system, including adopt
Collect lateral circuit and receive lateral circuit, the collection lateral circuit includes Current Voltage interface, power network signal sample circuit, power network signal
Process circuit, collection side CPU, RF wireless sending module, power grid phase sequence set circuit, power circuit, the Current Voltage interface
Output terminal be connected respectively to the input terminal of power network signal sample circuit and power circuit, the output terminal of power network signal sample circuit
The input terminal of power network signal process circuit is connected to, the output terminal of power network signal process circuit is connected to the input of collection side CPU
End, the output terminal of collection side CPU are connected to the input terminal of RF wireless sending modules, and power grid phase sequence sets the output terminal connection of circuit
To the input terminal of collection side CPU, the output terminal of power circuit be connected respectively to power network signal process circuit, collection side CPU, RF without
The input terminal of line sending module.The reception lateral circuit includes GPRS wireless transport modules, RF wireless receiving modules, RS485 moulds
Block, CAN module, receiving side CPU, keyboard input module, power module, display panel module, the GPRS wireless transport modules, RF
Wireless receiving module, RS485 modules, CAN module connect receiving side CPU, the output terminal connection connection of keyboard input module respectively
The input terminal of receiving side CPU, the output terminal connection display panel module of receiving side CPU, power module is respectively that GPRS is wirelessly transferred
Module, RF wireless receiving modules, RS485 modules, CAN module, receiving side CPU, keyboard input module, display panel module power supply.
The RF wireless sending modules and RF wireless receiving module wireless communications, realize the wireless telecommunication of power network signal.
Above-mentioned collection lateral circuit and reception lateral circuit are realized wireless by RF wireless sending modules and RF wireless receiving modules
Communication, realizes the transmission of power network signal, greatly reduces the harness of transmission signal, reduce human cost and system cost, connect
Receiving lateral circuit need to only connect with the mains in wireless coverage and can work, and the GPRS for receiving lateral circuit is wirelessly transferred mould
Block, RS485 modules, CAN module can realize that multi-signal transmits, and realize different functions.
The present invention, which is further arranged to GPRS wireless transport modules, includes communication chip M6311 and its peripheral cell resistance
R15, resistance R16, resistance R17, resistance R18, triode Q1, triode Q2, triode Q3, Light-emitting diode LED 1, the electricity
Resistance R15 and Light-emitting diode LED 1 are connected, and a termination high level of resistance R15, one end of Light-emitting diode LED 1 connects three poles
The collector of pipe Q1, resistance R16 one end connecting triode Q1 base stages, the indicator light of the other end connecting communication chip of resistance R16
Pin, the emitter ground connection of triode Q1, the conducting pin of the collector connecting communication chip of the triode Q2, resistance R17
The base stage of one end connecting triode Q2, the conducting pin of the other end connection receiving side CPU of resistance R17, the transmitting of triode Q2
Pole is grounded, the closing pin of the collector connecting communication chip of the triode Q3, the base of resistance R18 one end connecting triode Q3
Pole, the closing pin of the other end connection receiving side CPU of resistance R18, the emitter ground connection of triode Q3.
Above-mentioned GPRS wireless transport modules use the M6311GPRS communication modules of the newest release of China Mobile, without
Dismantle shell and place mobile phone card, it is possible to communicated by GPRS and terminal server, user need to only be taken by network access terminal
Business device can check the power load information of current and each period on mobile phone, can lead at the first time when emergency occurs
Know user.
The present invention, which is further arranged to RS485 modules, to be included RS485 transceivers and forms RS485 transceiver peripheral cells
Resistance R44, resistance R45, resistance R46, resistance R47, resistance R48, resistance R49, resistance R50, resistance R51, capacitance C29, three poles
Pipe Q4, the RS485 transceivers model Max13085, resistance R46 and resistance the R47 series connection, a termination of resistance R46
Ground, the RO pins of a termination RS485 transceivers of resistance R47, resistance R47 draw signal to receiving side with resistance R46 junctions
The RS485 data receivers of CPU, one end connection high level of the resistance R44, the other end connection RS485 transmitting-receivings of resistance R44
The RO pins of device, one end connection high level of the resistance R48, the DE of the other end connection RS485 transceivers of resistance R48 draw
Foot, the collector of the triode Q4 are connected to the DE pins of RS485 transceivers, the emitter ground connection of triode Q4, the electricity
R50 and resistance R51 series connection is hindered, one end of resistance R50 is connected in the base stage of triode, a termination high level of resistance R51, resistance
R50 draws signal to receiving side CPU with resistance R51 junctions
_ _ _ _ RS485 data sending terminals, the RE pins of RS485 transceivers are connected to DE pins, the DI of RS485 transceivers
Pin is grounded, and one end of the resistance R45 connects the VCC pin of RS485 transceivers and one end of capacitance C29, resistance R45 respectively
Other end connection RS485 transceivers A pins, the other end ground connection of capacitance C29, capacitance C29 and resistance R45 junctions connect height
Level, the B pins of one end connection RS485 transceivers of the resistance R49, the other end connection RS485 transceivers of resistance R49
GND pin, A pins and B pins the output signal of the RS485 transceivers.
Above-mentioned RS485 modules can realize that receive lateral circuit matches with intelligent electricity, combination switch respectively, in reactive-load compensation
Reactive power in complete set of equipments according to current system realizes reactive-load compensation work(come the operation for being put into and cutting out capacitor
Can, and reception lateral circuit and computer can be carried out communication and realize the functions such as data exchange by RS485 modules, and user can be by upper
Position machine software is come the data message checking and set digital display meter.
The present invention, which is further arranged to CAN module, to be included CAN transceiver and forms CAN transceiver peripheral cell resistance
R43, resistance R52, the CAN transceiver model TJA1040, the TXD pins of the CAN transceiver are connected to receiving side CPU
CAN data sending terminals, the RXD pins of CAN transceiver are connected to the CAN data receivers of receiving side CPU, CAN transceiver
VCC connects high level, the GND ground connection of CAN transceiver, the STB pins of one end connection CAN transceiver of the resistance R43, resistance
The other end ground connection of R43, the CANH pins of one end connection CAN transceiver of the resistance R52, the other end connection of resistance R52
The CANL pins of CAN transceiver, CANH pins and CANL pins the output signal of the CAN transceiver.
The intelligent capacitor and combination switch that above-mentioned CAN module can be produced with our company respectively match can be in reactive-load compensation
Reactive power in complete set of equipments according to current system realizes reactive-load compensation work(come the operation for being put into and cutting out capacitor
Energy.
The present invention, which is further arranged to power network signal sample circuit, includes current mode voltage transformer pt, secondary precision current
Mutual inductor CT2, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, capacitance C1, capacitance C2, capacitance C3, it is described
Resistance R4 is connected to the primary side side of current mode voltage transformer pt, and resistance R5 and capacitance C1 are in parallel, one end connection of resistance R5
In the secondary side of current mode voltage transformer pt, the other end ground connection of resistance R5, the resistance R7 is connected to secondary fine cipher telegram
The secondary side of current transformer CT2, one end of one end connection resistance R7 of resistance R6, one end connection resistance R7's of capacitance C2 is another
One end, the other end of resistance R6 and the other end common ground connection of capacitance C2, the resistance R8 are connected to secondary precision current mutual inductance
The secondary opposite side of device CT2, one end of one end connection resistance R8 of resistance R9, one end connection resistance R8's of capacitance C3 is another
End, the other end of resistance R9 and the other end common ground connection of capacitance C3, the current mode voltage transformer pt secondary output voltage
Sampled signal, secondary precision current transformer CT2 secondary output current sampled signal.
Above-mentioned resistance and capacitance are in parallel or connection in series-parallel is connected to secondary side signal output terminal, can filter out unwanted signal frequency
Part, has the function that filtering, and current signal is gathered by secondary precision current transformer, makes the voltage signal and electricity of sampling
It is high to flow signal accuracy.
The present invention be further arranged to power grid phase sequence set circuit include three-stage toggle switch and resistance R1, resistance R2,
Resistance R3, the three-stage toggle switch include switch S1, switch S2, switch S3, and the resistance R1 connects with switch S1, resistance
R2 connects with switch S2, and resistance R3 connects with switch S3, one end of the resistance R1, one end of resistance R2, one end of resistance R3
High level is commonly connected to, one end of the switch S1, switch one end of S2, switch one end common ground connection of S3.
Above-mentioned power grid phase sequence setting circuit components are few, and circuit is simple, and user need to only stir corresponding switch, and CPU is received
To switching signal, it is possible to set any one phase therein to three-phase to sample, improve circuit flexibility, facilitate user to grasp
Make.
Brief description of the drawings
Fig. 1 is collection lateral circuit functional-block diagram of the embodiment of the present invention.
Fig. 2 is receiving side circuit block diagram of the embodiment of the present invention.
Fig. 3 is GPRS wireless transport module circuit diagrams of the embodiment of the present invention.
Fig. 4 is GPRS wireless transport module peripheral circuit schematic diagrams of the embodiment of the present invention.
Fig. 5 is GPRS wireless transport module peripheral circuit schematic diagrams of the embodiment of the present invention.
Fig. 6 is GPRS wireless transport module peripheral circuit schematic diagrams of the embodiment of the present invention.
Fig. 7 is RS485 module circuit schematics of the embodiment of the present invention.
Fig. 8 is CAN module circuit diagram of the embodiment of the present invention.
Fig. 9 is power network signal sample circuit schematic diagram of the embodiment of the present invention.
Figure 10 is power network signal sample circuit schematic diagram of the embodiment of the present invention.
Figure 11 is that power grid of embodiment of the present invention phase sequence sets circuit diagram.
Figure 12 is collection side cpu circuit schematic diagram of the embodiment of the present invention.
Figure 13 is receiving side cpu circuit schematic diagram of the embodiment of the present invention.
Embodiment
In order to make the purpose of the present invention, technical solution and a little clearer, with reference to the specific embodiment of the invention and
Respective figure is fully described by.Obviously, the embodiment described is the part of the embodiment invented, and is not whole implementations
Example.Based on the embodiment of the present invention, other realities that those skilled in the art obtains without making creative work
Example is applied, belongs to protection scope of the present invention.
As shown in Fig. 1,2,12,13, the present invention is a kind of wireless multifunctional power network signal Transmission system, including collection side electricity
Road and reception lateral circuit, the collection lateral circuit include Current Voltage interface, power network signal sample circuit, power network signal processing electricity
Road, collection side CPU, RF wireless sending module, power grid phase sequence set circuit, power circuit, the output of the Current Voltage interface
End is connected respectively to the input terminal of power network signal sample circuit and power circuit, and the output terminal of power network signal sample circuit is connected to
The input terminal of power network signal process circuit, the output terminal of power network signal process circuit are connected to the input terminal of collection side CPU, collection
The output terminal of side CPU is connected to the input terminal of RF wireless sending modules, and power grid phase sequence sets the output terminal of circuit to be connected to collection
The input terminal of side CPU, the output terminal of power circuit are connected respectively to power network signal process circuit, collection side CPU, RF wireless transmission
The input terminal of module.The reception lateral circuit includes GPRS wireless transport modules, RF wireless receiving modules, RS485 modules, CAN
Module, receiving side CPU, keyboard input module, power module, display panel module, the GPRS wireless transport modules, RF wirelessly connect
Receive module, RS485 modules, CAN module and connect receiving side CPU, the output terminal connection connection receiving side of keyboard input module respectively
The input terminal of CPU, the output terminal connection display panel module of receiving side CPU, power module is respectively GPRS wireless transport modules, RF
Wireless receiving module, RS485 modules, CAN module, receiving side CPU, keyboard input module, display panel module power supply.The RF without
Line sending module and RF wireless receiving module wireless communications, realize the wireless telecommunication of power network signal.
As shown in Fig. 3,4,5,6,13, GPRS wireless transport modules include communication chip M6311 and its peripheral cell resistance
R15, resistance R16, resistance R17, resistance R18, triode Q1, triode Q2, triode Q3, Light-emitting diode LED 1, the electricity
Resistance R15 and Light-emitting diode LED 1 are connected, and a termination high level of resistance R15, one end of Light-emitting diode LED 1 connects three poles
The collector of pipe Q1, resistance R16 one end connecting triode Q1 base stages, the indicator light of the other end connecting communication chip of resistance R16
Pin, the emitter ground connection of triode Q1, the conducting pin of the collector connecting communication chip of the triode Q2, resistance R17
The base stage of one end connecting triode Q2, the conducting pin of the other end connection receiving side CPU of resistance R17, the transmitting of triode Q2
Pole is grounded, the closing pin of the collector connecting communication chip of the triode Q3, the base of resistance R18 one end connecting triode Q3
Pole, the closing pin of the other end connection receiving side CPU of resistance R18, the emitter ground connection of triode Q3.
As shown in Fig. 7,13, RS485 modules include RS485 transceivers and form RS485 transceiver peripheral cell resistance
R44, resistance R45, resistance R46, resistance R47, resistance R48, resistance R49, resistance R50, resistance R51, capacitance C29, triode Q4,
The RS485 transceivers model Max13085, resistance R46 and resistance the R47 series connection, one end ground connection of resistance R46, resistance
The RO pins of a termination RS485 transceivers of R47, resistance R47 draw signal to receiving side CPU's with resistance R46 junctions
RS485 data receivers, one end connection high level of the resistance R44, the other end connection RS485 transceivers of resistance R44
RO pins, one end connection high level of the resistance R48, the DE pins of the other end connection RS485 transceivers of resistance R48, institute
The collector for stating triode Q4 is connected to the DE pins of RS485 transceivers, the emitter ground connection of triode Q4, the resistance R50
Connect with resistance R51, one end of resistance R50 is connected in the base stage of triode, a termination high level of resistance R51, resistance R50 and electricity
Hinder R51 junctions and draw signal to the RS485 data sending terminals of receiving side CPU, RS485 transceiversPin is connected to DE
Pin, the DI pins ground connection of RS485 transceivers, one end of the resistance R45 connect respectively RS485 transceivers VCC pin and
One end of capacitance C29, the A pins of the other end connection RS485 transceivers of resistance R45, the other end ground connection of capacitance C29, capacitance
C29 connects high level with resistance R45 junctions, and one end of the resistance R49 connects the B pins of RS485 transceivers, resistance R49's
The other end connects the GND pin of RS485 transceivers, A pins and B pins the output signal of the RS485 transceivers.
As shown in Fig. 8,13, CAN module includes CAN transceiver and forms CAN transceiver peripheral cell resistance R43, electricity
R52, the CAN transceiver model TJA1040 are hindered, the TXD pins of the CAN transceiver are connected to the CAN numbers of receiving side CPU
According to transmitting terminal, the RXD pins of CAN transceiver are connected to the CAN data receivers of receiving side CPU, and the VCC of CAN transceiver connects height
Level, the GND ground connection of CAN transceiver, the STB pins of one end connection CAN transceiver of the resistance R43, resistance R43's is another
End ground connection, the CANH pins of one end connection CAN transceiver of the resistance R52, the other end connection CAN transceiver of resistance R52
CANL pins, the CAN transceiver CANH pins and CANL pins output signal.
As shown in Figures 9 and 10, power network signal sample circuit includes current mode voltage transformer pt, secondary precision current mutual inductance
Device CT2, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, capacitance C1, capacitance C2, capacitance C3, the resistance
R4 is connected to the primary side side of current mode voltage transformer pt, and resistance R5 and capacitance C1 are in parallel, and one end of resistance R5 is connected to electricity
The secondary side of flow pattern voltage transformer pt, the other end ground connection of resistance R5, it is mutual that the resistance R7 is connected to secondary precision current
The secondary side of sensor CT2, one end of one end connection resistance R7 of resistance R6, one end connection resistance R7's of capacitance C2 is another
End, the other end of resistance R6 and the other end common ground connection of capacitance C2, the resistance R8 are connected to secondary precision current transformer
The secondary opposite side of CT2, one end of one end connection resistance R8 of resistance R9, the other end of one end connection resistance R8 of capacitance C3,
The other end of resistance R9 and the other end common ground connection of capacitance C3, the current mode voltage transformer pt secondary output voltage sampling
Signal, secondary precision current transformer CT2 secondary output current sampled signal.
As shown in figure 11, power grid phase sequence sets circuit to include three-stage toggle switch and resistance R1, resistance R2, resistance R3,
The three-stage toggle switch includes switch S1, switch S2, switchs S3, and the resistance R1 connects with switch S1, and resistance R2 is with opening
S2 series connection is closed, resistance R3 connects with switch S3, and one end of the resistance R1, one end of resistance R2, one end of resistance R3 are commonly connected to
High level, one end of the switch S1, switch one end of S2, switch one end common ground connection of S3.
According to above example, user can set circuit to set and a three-phase wherein phase is adopted by power grid phase sequence
Sample, a collection lateral circuit collection wherein phase voltage current signal obtain voltage, electric current, power, harmonic wave, the frequency of power grid by processing
The data such as rate, electric energy, the RF wireless receiving modules for receiving lateral circuit are sent to by RF wireless sending modules, are eliminated substantial amounts of
Signal transmission harness, avoids the generation of the fortuitous event such as short circuit, fire caused by wiring is unreasonable.Receive lateral circuit then
Can realize the multi-signal way of output, GPRS module uploads data to terminal server, user can be checked by mobile phone it is current and
The power load information of each period, user can be notified at the first time when emergency occurs；CAN module and RS485 modules
Idle work(that can be in reactive-load compensation complete equipment according to current system can be matched with intelligent capacitor and combination switch respectively
Rate realizes no-power compensation function come the operation for being put into and cutting out capacitor；In addition RS485 modules can be led to computer
The functions such as reliable existing data exchange, the data message that user can be by upper computer software to check and set digital display meter.
Claims (6)
- A kind of 1. wireless multifunctional power network signal Transmission system, it is characterised in that：The wireless multifunctional power network signal transmission system System includes gathering lateral circuit and receives lateral circuit,The collection lateral circuit includes Current Voltage interface, power network signal sample circuit, power network signal process circuit, collection side CPU, RF wireless sending module, power grid phase sequence set circuit, power circuit, and the output terminal of the Current Voltage interface connects respectively To power network signal sample circuit and the input terminal of power circuit, the output terminal of power network signal sample circuit is connected at power network signal The input terminal of circuit is managed, the output terminal of power network signal process circuit is connected to the input terminal of collection side CPU, and collection side CPU's is defeated Outlet is connected to the input terminal of RF wireless sending modules, and power grid phase sequence sets the output terminal of circuit to be connected to the defeated of collection side CPU Enter end, the output terminal of power circuit is connected respectively to power network signal process circuit, gathers the defeated of side CPU, RF wireless sending module Enter end,The reception lateral circuit includes GPRS wireless transport modules, RF wireless receiving modules, RS485 modules, CAN module, reception Side CPU, keyboard input module, power module, display panel module, the GPRS wireless transport modules, RF wireless receiving modules, RS485 modules, CAN module connect receiving side CPU respectively, and the output terminal connection connection receiving side CPU's of keyboard input module is defeated Enter end, the output terminal connection display panel module of receiving side CPU, power module is respectively that GPRS wireless transport modules, RF wirelessly connect Module, RS485 modules, CAN module, receiving side CPU, keyboard input module, display panel module power supply are received,The RF wireless sending modules and RF wireless receiving module wireless communications, realize the wireless telecommunication of power network signal.
- 2. wireless multifunctional power network signal Transmission system according to claim 1, it is characterised in that：The GPRS is wirelessly passed Defeated module include communication chip M6311 and its peripheral cell resistance R15, resistance R16, resistance R17, resistance R18, triode Q1, Triode Q2, triode Q3, Light-emitting diode LED 1, the resistance R15 and Light-emitting diode LED 1 are connected, and the one of resistance R15 Terminate high level, the collector of one end connecting triode Q1 of Light-emitting diode LED 1, resistance R16 one end connecting triode Q1 bases Pole, the light pin of the other end connecting communication chip of resistance R16, the emitter ground connection of triode Q1, the triode Q2 Collector connecting communication chip conducting pin, the base stage of resistance R17 one end connecting triode Q2, the other end of resistance R17 Connect the conducting pin of receiving side CPU, the emitter ground connection of triode Q2, the collector connecting communication chip of the triode Q3 Closing pin, the base stage of resistance R18 one end connecting triode Q3, the closing of the other end connection receiving side CPU of resistance R18 draws Foot, the emitter ground connection of triode Q3.
- 3. wireless multifunctional power network signal Transmission system according to claim 1 or 2, it is characterised in that：The RS485 moulds Block include RS485 transceivers and form RS485 transceiver peripheral cell resistance R44, resistance R45, resistance R46, resistance R47, Resistance R48, resistance R49, resistance R50, resistance R51, capacitance C29, triode Q4, the RS485 transceivers model Max13085, resistance R46 and resistance the R47 series connection, one end ground connection of resistance R46, a termination RS485 transmitting-receivings of resistance R47 The RO pins of device, resistance R47 draw signal to the RS485 data receivers of receiving side CPU, the electricity with resistance R46 junctions One end connection high level of resistance R44, the RO pins of the other end connection RS485 transceivers of resistance R44, the one of the resistance R48 End connection high level, the DE pins of the other end connection RS485 transceivers of resistance R48, the collector connection of the triode Q4 To the DE pins of RS485 transceivers, the emitter of triode Q4 is grounded, resistance R50 and resistance the R51 series connection, resistance R50's One end is connected in the base stage of triode, a termination high level of resistance R51, and resistance R50 and resistance R51 junctions extraction signal is to connecing The RS485 data sending terminals of side CPU are received, RS485 transceiversPin is connected to DE pins, the DI pins of RS485 transceivers Ground connection, one end of the resistance R45 connect the VCC pin of RS485 transceivers and one end of capacitance C29 respectively, and resistance R45's is another One end connects the A pins of RS485 transceivers, the other end ground connection of capacitance C29, and capacitance C29 connects high electricity with resistance R45 junctions It is flat, the B pins of one end connection RS485 transceivers of the resistance R49, the other end connection RS485 transceivers of resistance R49 GND pin, A pins and B pins the output signal of the RS485 transceivers.
- 4. wireless multifunctional power network signal Transmission system according to claim 1 or 2, it is characterised in that：The CAN module Including CAN transceiver and form CAN transceiver peripheral cell resistance R43, resistance R52, the CAN transceiver model TJA1040, the TXD pins of the CAN transceiver are connected to the CAN data sending terminals of receiving side CPU, and the RXD of CAN transceiver draws Foot is connected to the CAN data receivers of receiving side CPU, and the VCC of CAN transceiver meets high level, the GND ground connection of CAN transceiver, institute The STB pins of one end connection CAN transceiver of resistance R43 are stated, the other end ground connection of resistance R43, one end of the resistance R52 connects The CANH pins of CAN transceiver are connect, the other end of resistance R52 connects the CANL pins of CAN transceiver, the CAN transceiver CANH pins and CANL pins output signal.
- 5. wireless multifunctional power network signal Transmission system according to claim 1, it is characterised in that：The power network signal is adopted Sample circuit includes current mode voltage transformer pt, secondary precision current transformer CT2, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, capacitance C1, capacitance C2, capacitance C3, the resistance R4 are connected to the original of current mode voltage transformer pt Side side, resistance R5 and capacitance C1 are in parallel, and one end of resistance R5 is connected to the secondary side of current mode voltage transformer pt, resistance The other end ground connection of R5, the resistance R7 are connected to the secondary side of secondary precision current transformer CT2, and one end of resistance R6 connects One end of connecting resistance R7, the other end of one end connection resistance R7 of capacitance C2, the other end of resistance R6 and the other end of capacitance C2 Common ground connection, the resistance R8 are connected to the secondary opposite side of secondary precision current transformer CT2, one end connection electricity of resistance R9 One end of R8 is hindered, the other end of one end connection resistance R8 of capacitance C3, the other end of resistance R9 and the other end of capacitance C3 are altogether Connection, the current mode voltage transformer pt secondary output voltage sampled signal, secondary precision current transformer CT2 secondary output Current sampling signal.
- 6. wireless multifunctional power network signal Transmission system according to claim 1 or 5, it is characterised in that：The power grid phase Sequence sets circuit to include three-stage toggle switch and resistance R1, resistance R2, resistance R3, and the three-stage toggle switch includes switch S1, switch S2, switch S3, the resistance R1 connect with switch S1, and resistance R2 connects with switch S2, resistance R3 and switch S3 strings Connection, one end of the resistance R1, one end of resistance R2, one end of resistance R3 are commonly connected to high level, and one end of the switch S1, open Close one end of S2, switch one end common ground connection of S3.
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| CN201711209956.2A CN108008178A (en) | 2017-11-28 | 2017-11-28 | Wireless multifunctional power network signal Transmission system |
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| CN201711209956.2A CN108008178A (en) | 2017-11-28 | 2017-11-28 | Wireless multifunctional power network signal Transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485746A (en) * | 2020-11-20 | 2021-03-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Wireless transmission system for secondary signals of alternating current-direct current high-voltage divider |
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