CN102025399B - Asymmetrical carrier communication system of electric energy meter - Google Patents
Asymmetrical carrier communication system of electric energy meter Download PDFInfo
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- CN102025399B CN102025399B CN 201010299644 CN201010299644A CN102025399B CN 102025399 B CN102025399 B CN 102025399B CN 201010299644 CN201010299644 CN 201010299644 CN 201010299644 A CN201010299644 A CN 201010299644A CN 102025399 B CN102025399 B CN 102025399B
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Abstract
The invention relates to an asymmetrical carrier communication system of an electric energy meter, comprising an electric energy meter gateway, a control network bridge and a white information appliance load, wherein the electric energy meter gateway is accessed between a phase line and an N phase in a three-phase four-wire system at the low voltage side of a 10 kV/0.4 kV distribution transformer of an electrical power system, the control network bridge is accessed between the phase line and N phase of the electrical power system by the electric energy meter gateway, the white information appliance load which is taken as a load is electrically connected with the control network bridge, and the digital communication is carried out between the electric energy meter gateway and the control network bridge and between the electric energy meter gateway and the white information appliance load; and a voltage mode FSK (frequency shift keying) or S-FSK (spread frequency shift keying) modulating signal is adopted for the communication between the electric energy meter gateway and the control network bridge, and a current mode FSK or S-FSK modulating signal is adopted for the communication from the control network bridge to the electric energy meter gateway.
Description
Technical field
The present invention relates to a kind of carrier communication system, be specifically related between electric energy meter main frame and the white information household electrical appliances slave, can carry out the carrier communication system that asymmetric electric power carrier digital communication is implemented control and information interaction.
Background technology
Current known electronic electric energy meter all is a kind of ammeter of electric energy metrical, or power carrier concentrator (main frame) carries out voltage coupled mode power line carrier electrical energy meter centralized automatic meter-reading by 380VAC three-phase and four-line power line and each power carrier electric energy meter (slave) in the platform change.It is current that also not have electric energy meter be gateway (main frame), the power line by electric energy meter output enter in the user family with user family in white information household electrical appliances (slave), carry out the power line carrier, PLC implementation information mutual with control.Current existing power line carrier electric energy meter automatic meter reading system is referring to accompanying drawing 1 and Fig. 2.
In order to make electronic electric energy meter carry out power line carrier communication by white information household electrical appliances in power line and the family, and as power line carrier communication gateway (main frame), and the white information household electrical appliances that electronic electric energy meter load below is inserted are as slave with electronic electric energy meter.That is to say, Asymmetric Electric powerline carrier communication electric energy meter gateway can only carry out the Asymmetric Electric powerline carrier communication with the white information household electrical appliances of Asymmetric Electric powerline carrier communication electric energy meter gateway output lower end power supply, and the 380VAC power line trunk of asymmetric power line carrier communication electric energy meter gateway upper end input does not have power line carrier, PLC device and carrier signal.The Asymmetric Electric power carrier communication is abbreviated as: APLC (Asymmetric Power line carrier).
Summary of the invention
In order to make existing electronic electric energy meter carry out Asymmetric Electric line of force carrier digital communication with the white information household electrical appliances, the invention provides a kind of electric energy meter, formation is main frame with Asymmetric Electric powerline carrier communication electric energy meter gateway, and the white information household electrical appliances are the electric energy meter of the asymmetric device for power line carrier communications of slave.
The power line carrier signal can enter the electricity consumption user at electric energy meter output power line, and be connected with user's white information man electric loading and carry out the Asymmetric Electric powerline carrier communication, and the electric energy meter that can manage white information household electrical appliances information data, be referred to as APLC electric energy meter gateway.
The present invention is in China
200410103051.3 number application for a patent for invention: on the basis of " a kind of asymmetric electric power carrier communication device ", realize that a kind of Asymmetric Electric powerline carrier communication electric energy meter gateway and load white information household electrical appliances slave carry out the device of power line carrier communication.
Realize that the object of the invention technical scheme is: the asymmetric carrier communication system of a kind of electric energy meter, be provided with the electric energy meter gateway in the asymmetric carrier communication system of described electric energy meter, control bridge and white information man electric loading, the electric energy meter gateway inserts electric power system 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system (A phase, the B phase, the C phase, the N phase) between phase line and the N phase (center line), the control bridge inserts between the phase line and N phase of electric power system by the electric energy meter gateway, white information man electric loading is electrically connected as load and control bridge, described electric energy meter gateway and control bridge, white information man electric loading is carried out digital communication; Described electric energy meter gateway adopts voltage-type FSK or S-FSK modulation signal with the control bridging communication, and control bridge and electric energy meter gateway communication adopt current mode FSK or S-FSK modulation signal.
The present invention arranges Asymmetric Electric powerline carrier communication circuit in electric energy meter, make electric energy meter when finishing the electric energy metrical basic function, forms Asymmetric Electric powerline carrier communication electric energy meter gateway.And asymmetric power line carrier communication electric energy meter gateway can carry out digital communication with load, load can be white information household electrical appliances such as the network air-conditioner, network electric heater, network refrigerator of asymmetric power line carrier communication, and Asymmetric Electric powerline carrier communication and radio communication electric energy show control bridge etc.Described electric energy meter gateway is asymmetric power line carrier communication electric energy meter gateway, is the carrier circuit that forms at power line center line series connection high-frequency mutual inductance device, carries out the Asymmetric Electric powerline carrier communication.
Be provided with asymmetric electric power carrier communication device in the electric energy meter gateway, this device is: N phase (center line) the series connection isolated form high-frequency mutual inductance device in the electric energy meter gateway, the electric energy meter gateway produces voltage-type FSK(frequency shift keying by isolated form high-frequency mutual inductance device) modulation signal carries out power carrier communication with the control bridge, and the control bridge produces electric current FSK(frequency shift keying) modulation signal forms induction modulation FSK voltage signal and the electric energy meter gateway carries out electric line carrier communication at isolated form high-frequency mutual inductance device coil.The electric energy meter gateway is voltage-type FSK(frequency shift keying with the control bridging communication) modulation signal, control bridge and electric energy meter gateway communication are current mode FSK(frequency shift keyings) modulation signal, so be referred to as asymmetric electric line carrier communication.
Described electric energy meter gateway is made up of micro-processor interface circuit, Asymmetric Electric powerline carrier communication circuit, infrared communication circuit, RS-485 circuit, ic for energy metering and voltage stabilizing circuit.Also can be formed by micro-processor interface circuit, Asymmetric Electric powerline carrier communication circuit, infrared communication circuit, RS-485 telecommunication circuit, voltage stabilizing circuit 5 parts in the described Asymmetric Electric powerline carrier communication electric energy meter gateway, be formed the independent Asymmetric Electric powerline carrier communication gateway that does not have ic for energy metering.
Described electric energy meter gateway also can be the electric energy meter gateway of three-phase four-wire system.
The present invention's employing arranges gateway and carries out asymmetric carrier communication in electric energy meter, towards electric power system 10kV/0.4kV distribution transformer low-pressure side power load control bridge information terminal, realize measurement and control to each load bus.In 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system trunk power line, there is not main frame carrier communication signal among the present invention, and the electric energy meter gateway is the main frame as the APLC communication, and the input of electric energy meter gateway is to be connected in the distribution transformer low-pressure side three-phase four-wire system trunk power line, the output of electric energy meter gateway is the power line branch line in the trunk power line, so the electric energy meter gateway of APLC communication is the node of trunk power line and power line branch line.APLC electric energy meter gateway be a kind of on the electric power branch line with the electric power branch line on the APLC information terminal carry out the APLC communication.This moment, APLC electric energy meter gateway was main frame, APLC information terminal on the electric power branch line is slave, and the inner APLC circuit of APLC electric energy meter gateway host, be by center line series connection high-frequency mutual inductance device and phase line coupling capacitance, the voltage signal of voltage-type FSK or S-FSK modulation is coupling between the center line and phase line of center line series connection high-frequency mutual inductance device load one side, and the opposite side of center line series connection high-frequency mutual inductance device, by in the inner APLC circuit of APLC electric energy meter gateway host because coupling capacitance (CA2) is arranged between N line and phase line, so the voltage signal of the FSK of the power line input of APLC electric energy meter gateway or S-FSK modulation is coupled electric capacity (CA2) short circuit.Advantage of the present invention is to be parallel with a plurality of APLC electric energy meter gateways (power line node) in 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system trunk power line, and each APLC electric energy meter gateway can only with relevant electric power branch line on APLC information terminal slave carry out the APLC communication, and each APLC electric energy meter gateway does not have the voltage signal of FSK or S-FSK modulation each other in the trunk power line, make between each APLC electric energy meter gateway host when real-time communication, do not disturb mutually, improved reliability and anti-interference.The APLC information terminal slave of each electric power branch line is the current signal of the FSK that sends or S-FSK modulation in addition, the current signal of modulation can not flow in other electric power branch line, can only flow back in the 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system subgrade coil, so the APLC electric energy meter gateway host on the electric power branch line that APLC information terminal slave is the current signal of the FSK that sends or S-FSK modulation can only be correlated with receives.And the current signal of FSK or S-FSK modulation is difficult for disturbed in long transmission line, and FSK or S-FSK modulation that APLC information terminal slave can little current forms form the long distance of low power mode and carry out the APLC communication.
Description of drawings
Fig. 1 existing power line carrier communication electric energy meter automatic meter reading system sketch;
Fig. 2 existing power line carrier communication electric energy meter automatic meter reading system structural representation;
The asymmetric carrier communication system block diagram of Fig. 3 electric energy meter of the present invention;
Fig. 4 electric energy meter gateway of the present invention and control bridge syndeton block diagram;
Fig. 5 electric energy meter gateway circuit of the present invention schematic diagram.
Embodiment
With reference to accompanying drawing 3 and shown in Figure 4, the asymmetric carrier communication system of a kind of electric energy meter, be provided with electric energy meter gateway 1 in the asymmetric carrier communication system of electric energy meter, control bridge 2 and white information man electric loading 3, the electric energy meter gateway is located in the electric energy meter, electric energy meter inserts electric power system 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system (A phase, the B phase, the C phase, the N phase) between phase line and the N phase (center line), control bridge 2 is electrically connected with white information man electric loading 3, control bridge 2 inserts electric power system by electric energy meter gateway 1, and electric energy meter gateway 1 carries out digital communication by control bridge 2 and white information man electric loading 3.
Be provided with asymmetric electric power carrier communication device between electric energy meter gateway 1 and the control bridge 2, this device comprises: N phase (center line) the series connection isolated form high-frequency mutual inductance device 4 of electric energy meter gateway, electric energy meter gateway 1 produces voltage-type FSK(frequency shift keyings by isolated form high-frequency mutual inductance device 2) modulation signal carries out power carrier communication with control bridge 2, and control bridge 2 produces electric current FSK(frequency shift keyings) modulation signal forms induction modulation FSK voltage signal and electric energy meter gateway 1 carries out electric line carrier communication at isolated form high-frequency mutual inductance device coil.The electric energy meter gateway is voltage-type FSK(frequency shift keying with the control bridging communication) modulation signal, control bridge and electric energy meter gateway communication are current mode FSK(frequency shift keyings) modulation signal, so be referred to as asymmetric electric line carrier communication.
Shown in accompanying drawing 4, present embodiment electric energy meter gateway circuit schematic diagram comprises: micro-processor interface circuit 10, Asymmetric Electric powerline carrier communication circuit 20, infrared communication circuit 30, RS-485 circuit 40, voltage stabilizing circuit 60 and ic for energy metering 50 are formed.
Shown in accompanying drawing 5, micro-processor interface circuit 10 is by IC1 microprocessor, IC2 analog switch, IC3 time circuit, TC4 EEPROM, IC5 temperature sensing chip, IC6 display circuit, IC7 reset circuit, and peripheral components is formed.The IC1 microprocessor adopts the P89LPC9XX family chip in the microcontroller circuit, and the communication serial port RXD of microprocessor is connected 9,11 and 1,3 of IC2 analog switch with TXD; The 8,10 and 2, the 4th of IC2 analog switch forms two-way communicate by letter serial port RXD1, RXD2 and TXD2, TXD1; The control end 5 of IC2 analog switch, 13 connects IC1 microprocessor P0.5, P0.4 mouth.RXD1, TXD1 connect U2 multichannel optical coupler A1, A2 in the RS-485 telecommunication circuit, and transmitting-receiving control optical coupler A3 is connected to the P0.2 mouth of IC1 microprocessor; RXD2, TXD2 connect IA1 modem chip RD, XD in the Asymmetric Electric power carrier communication circuit, and transmitting-receiving control mouthful RS is connected P0.6 mouth and the P0.3 mouth of IC1 microprocessor with detection mouthful CD; IC3 time circuit, TC4 eeprom memory, IC5 temperature sensing chip, IC6 display circuit are I2C bus interface SDA, the SCL that is connected to the IC1 microprocessor by I2C bus interface SDA, SCL correspondence; The RST of IC7 reset circuit connects the RST of IC1 microprocessor; Z1 is crystal oscillator in the circuit part 1, and corresponding peripheral resistance, capacitor element are formed.
Asymmetric Electric power carrier communication circuit 20 be to drive triode, TA2 switch triode, LA1 high-frequency mutual inductance device by IA1 modem chip, IA2 amplifier, TA1, and peripheral components is formed.The IA1 modem chip adopts MSM7512(or LM1893, AMIS-49587 in the Asymmetric Electric power carrier communication circuit), IA1 modem chip Ain mouth is the input of the modulation signal that sends of control bridge; The electric current fsk modulated signal that white information household appliance control bridge sends be will the coil through 4,5 ends of electric power center line LA1 high-frequency mutual inductance device in, the electric current fsk modulated signal induces the fsk modulated signal of small voltage value in the coil of 4,5 ends of high-frequency mutual inductance device at 1,3 ends of LA1 high-frequency mutual inductance device through inductance coupling high, deliver to IA2 amplifier positive terminal 1, IA2 amplifier by the amplification of RA4/RA1 ratio by capacitor C A3, RA2 resistance, and by RA4 and CA4 filtering, the fsk modulated signal that amplifies is inserted IA1 modem chip Ain mouth through capacitor C A5.IA1 modem chip Aout mouth is the voltage fsk modulated signal that sends, send into the base stage that TA1 drives triode through CA7, emitter is by resistance R A5, capacitor C A8 ground connection, collector electrode connects 3 ends of LA1 high-frequency mutual inductance device and 2 termination power VD of LA1 high-frequency mutual inductance device, this moment, 2 ends and 3 ends of LA1 high-frequency mutual inductance device had the voltage fsk modulated signal, through inductance coupling high 5 ends of LA1 high-frequency mutual inductance device=, 4 ends arrive through high-voltage capacitance CA2, have the higher fsk modulated signal of voltage to be sent to white information household appliance control bridge with two ends.Because the coil 4 of LA1 high-frequency mutual inductance device, 5 ends are to be connected in the power line center line, coil 4 ends are connected to end electric power phase line through high-voltage capacitance CA2, coil 5 end=ends are electric power center lines, and end is directly towards the center line of white information household electrical appliances power supply, so the higher fsk modulated signal of voltage of coupling can only carry out carrier communication at the white information household electrical appliances of power line load direction.TA2 switch triode, resistance R A6, RA7, RA8 form transmitting-receiving control, when the electric energy meter gateway is launched, the RS of IA1 modem chip, MOD1 are low level, the base stage of TA2 switch triode has base current, the conducting of TA2 switch triode, TA1 drives triode and enters the amplification service area; The RXD2 of IC2 analog switch, TXD2 connect IA1 modem chip RD, XD in the Asymmetric Electric power carrier communication circuit, and transmitting-receiving control mouthful RS is connected P0.6 mouth and the P0.3 mouth of IC1 microprocessor with detection mouthful CD; ZA1 is crystal oscillator, and DA is amplitude limiter.
RS-485 telecommunication circuit 30 be to drive chip, U2 multichannel optical coupler by U1 RS-485, and peripheral components is formed.The RS-485 telecommunication circuit, adopting U1 RS-485 driving chip SP485E, U2 multichannel optical coupler is that electricity is isolated U1 RS-485 driving chip SP485E; U2 multichannel optical coupler and U1 RS-485 drive chip SP485E and between the power supply of connecting circuit be independent current source VEE and GND; 1 end of U2 multichannel optical coupler is connected RXD1, the TXD1 of IC2 analog switch with 4 ends, 6 ends connect IC1 microprocessor P0.2 for the transmitting-receiving control end, and this partial circuit power supply is VDD and relative ground; 1 end that U1 RS-485 drives chip SP485E is connected 11 ends and 10 ends of U2 multichannel optical coupler with 4 ends, be connected in parallel 7 ends of U2 multichannel optical coupler of 2 ends of driving chip SP485E and 3 ends; A, the B end that 6 ends of RS-485 driving chip SP485E and 7 ends are the RS-485 bus, bus interface is JK1; DU1 is amplitude limiter in the circuit part 3, and corresponding peripheral resistance, capacitor element are formed.
The infrared communication circuit adopts the infrared receiving chip TOP1838 of JD, and infrared receiving chip TOP1838 exports 1 end and connects RXD2; FD infrared-emitting diode EIR-305 and T1 modulation triode, T2 drive triode and corresponding peripheral resistance device, form 38KHz modulated digital communication infrared emission circuit; Wherein T2 drives transistor base by resistance R 20 connection TXD2, and T1 modulation transistor base connects IC1 microprocessor P0.1 by resistance R 18, and P0.1 is 38KHz modulation signal output, also is the control port of infrared communication radiating circuit simultaneously; The infrared communication radiating circuit ends when P0.1 is high level; When P0.1 is the output of 38KHz modulation signal, the work of infrared communication radiating circuit; R21 is current-limiting resistance in the circuit part 4, and R17, R19 are pull-up resistor.
Ic for energy metering 50 is by IB1 electric energy computation chip, IB2 reset circuit, IB6 multichannel optical coupler, IB3 voltage regulator chip, and peripheral components is formed.
Ic for energy metering, IB1 electric energy computation chip are the ADE7755 chips that adopts current American ADI company (or China produces corresponding chip BL6503), and U.S. ADI company provides known ic for energy metering; Resistance R B1, RB2, RB3 in the known ic for energy metering, capacitor C B1, CB2, CB3 form current sampling circuit, resistance R B1 is manganin shunt (the about hundreds of μ of resistance Ω), electric power phase line current is through resistance R B1 when the user load electricity consumption, resistance R B1 has voltage drop voltage, this voltage drop voltage is connected to 5 ends and 6 ends of IB1 electric energy computation chip ADE7755 through RB2, RB3, capacitor C B1, CB2 are filter capacitor, capacitor C B3 is phase difference correction electric capacity, and connector J6 can open a way or short circuit when needing to revise; RB4-RB15 is composed in series bleeder circuit in the ic for energy metering, resistance R B4 one terminates to the electric power center line, bleeder circuit is 220VAC voltage to be carried out dividing potential drop drop to the hundreds of millivolt, wherein RB9-RB13 resistance is to there being branch pressure voltage value revision connector J1-J5, connector J1-J5 can open a way respectively or the branch pressure voltage value is revised in short circuit, the end of resistance R B15 and RB16 is connected to the electric power phase line by inductance L B1, and resistance R B15 is connected 8 ends and 7 ends of IB1 electric energy computation chip ADE7755 with the other end of RB16; The IB2 reset circuit adopts MAX809, the MAX809 RST end that resets to connect the RST end of IB1 electric energy computation chip ADE7755; 13,14,14,16 ends of IB1 electric energy computation chip ADE7755 are chip internal amplifier gain and frequency division selecting side, can pass through connector J7-J10 and select high level or low level; 22 ends of IB1 electric energy computation chip ADE7755 are outputs of electric energy frequency inverted, frequency output pulse is connected to B1 optical coupler 1 end among the multichannel optical coupler IB6 by RB19, light-emitting diode DB6, the B1 optical coupler is to connect with 2 ends of B2 optical coupler with 3 ends, 4 ends of B2 optical coupler connect DGND, the B1 optical coupler is exported 16 ends and is connected JK2 with 15 ends, JK2 is pulse output external tapping, and output 14 ends of B2 optical coupler connect IC1 microprocessor count T1 mouth; 20 ends of IB1 electric energy computation chip ADE7755 are to judge that the electric current on the resistance R B1 is forward or reverse output, 20 ends of ADE7755 are connected to B3 optical coupler 5 ends among the multichannel optical coupler IB6 by RB20, B3 optical coupler 6 ends connect DGND, and the B3 optical coupler is exported 12 ends and connected IC1 microprocessor count P2.6 mouth; 17,18 ends of ADE7755 connect crystal oscillator ZB1; The voltage stabilizing circuit that ic for energy metering uses is made up of piezo-resistance MOV, resistance R B22, capacitor C B12, voltage stabilizing didoe DB1, rectifier diode DB2, filter capacitor CB13, CB14, IB3 voltage regulator chip, filter capacitor CB15, CB16, CB17, inductance L B1, and voltage stabilizing circuit is a floating type voltage stabilizing circuit.
Claims (7)
1. asymmetric carrier communication system of electric energy meter, it is characterized in that, be provided with electric energy meter gateway, control bridge and white information man electric loading in the asymmetric carrier communication system of described electric energy meter, the electric energy meter gateway inserts between the phase line and N phase of electric power system 10kV/0.4kV distribution transformer low-pressure side three-phase four-wire system, the control bridge inserts between the phase line and N phase of electric power system by the electric energy meter gateway, white information man electric loading is electrically connected as load and control bridge, and described electric energy meter gateway and control bridge, white information man electric loading are carried out digital communication; Described electric energy meter gateway adopts voltage-type FSK or S-FSK modulation signal with the control bridging communication, and control bridge and electric energy meter gateway communication adopt current mode FSK or S-FSK modulation signal.
2. the asymmetric carrier communication system of electric energy meter according to claim 1, it is characterized in that, be provided with asymmetric electric power carrier communication device in the electric energy meter gateway, this device is the N of the electric energy meter gateway isolated form high-frequency mutual inductance device that is in series, the electric energy meter gateway carries out power carrier communication by isolated form high-frequency mutual inductance device generation voltage-type fsk modulated signal with control bridge or white information household electrical appliances, and control bridge generation electric current fsk modulated signal carries out electric line carrier communication at isolated form high-frequency mutual inductance device coil formation induction modulation FSK voltage signal and electric energy meter gateway.
3. the asymmetric carrier communication system of electric energy meter according to claim 1 is characterized in that, described electric energy meter gateway is made up of micro-processor interface circuit, Asymmetric Electric powerline carrier communication circuit, infrared communication circuit, RS-485 circuit and voltage stabilizing circuit.
4. the asymmetric carrier communication system of electric energy meter according to claim 3, it is characterized in that described micro-processor interface circuit is made up of IC1 microprocessor, IC2 analog switch, IC3 time circuit, TC4 EEPROM, IC5 temperature sensing chip, IC6 display circuit, IC7 reset circuit and peripheral components.
5. the asymmetric carrier communication system of electric energy meter according to claim 3 is characterized in that, the infrared communication circuit is made up of infrared receiving chip JD, infrared-emitting diode FD, modulation triode T1, driving triode T2 and peripheral components.
6. the asymmetric carrier communication system of electric energy meter according to claim 3 is characterized in that, also comprises ic for energy metering in the described electric energy meter gateway.
7. the asymmetric carrier communication system of electric energy meter according to claim 6 is characterized in that, ic for energy metering is made up of electric energy computation chip IB1, reset circuit IB2, multichannel optical coupler IB6, voltage regulator chip IB3 and peripheral components.
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| CN103018510B (en) * | 2012-07-10 | 2015-11-18 | 郭建国 | Isolation spi bus electric energy metering module and APLC ammeter thereof |
| TWI517079B (en) | 2013-07-30 | 2016-01-11 | 財團法人工業技術研究院 | Method for identifying electronic device and apparatus and system using the same |
| CN106448122A (en) * | 2016-02-26 | 2017-02-22 | 陈建丰 | System and method for achieving data transmission directly through power line |
| CN108415338A (en) * | 2018-04-23 | 2018-08-17 | 吉林化工学院 | A kind of students' dormitory safety monitoring system and method |
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