CN201075247Y - Single phase electronic type cutting-supplying electricity wave carrier electric energy meter - Google Patents
Single phase electronic type cutting-supplying electricity wave carrier electric energy meter Download PDFInfo
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- CN201075247Y CN201075247Y CNU2007201156879U CN200720115687U CN201075247Y CN 201075247 Y CN201075247 Y CN 201075247Y CN U2007201156879 U CNU2007201156879 U CN U2007201156879U CN 200720115687 U CN200720115687 U CN 200720115687U CN 201075247 Y CN201075247 Y CN 201075247Y
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Abstract
The utility model relates to a cutoff and carrier wave electric energy meter of single-phase electronic type. With the startup of urban and rural power grid construction renovation project with large scale and the gradual execution of the policies of one household one meter and metering for each household, the traditional manual meter reading method exposes increasingly serious quality and efficiency problems; meter reading has become serious bottleneck of power marketing, and the fundamental way to solve the problem is to realize long-distance automatic centralized meter-reading. The utility model consists of a shell and a power circuit module arranged inside the shell; a power energy measurement module connected with the power circuit module through a circuit is integrated with a powerline carrier wave communication module on a piece of PCB plate; the front of the power energy measurement module is a signal sampling module; the circuit of the carrier wave communication module comprises a carrier wave concentrator; the power energy measurement module and the powerline carrier wave communication module are connected with a computer management center. The utility model is based on remote meter reading and control of computer communication.
Description
Technical field:
The utility model relates to a kind of full electronic electric energy metrical measure and control instrument.
Background technology:
The startup of building improvement project along with large-scale urban and rural power grids is with Every household has an ammeter, the progressively enforcement of the policy of reading the ammeter directly, and traditional manual meter reading method exposes serious day by day quality and efficiency.The link of checking meter has become the serious bottleneck of power marketing, and the fundamental way that addresses this problem is to adopt the advanced reading technique and the means of checking meter, and promptly realizes the remote centralized automatic data logging.
The implementation of remote centralized Automatic meter reading system: the remote automatic meter reading technology mainly contains power-line carrier communication and cable communicating technology.There are the intrinsic problems such as communication line is great in constructing amount, integrated cost is high, maintenance cost is high, the old urban area difficulty of construction is big of laying in cable communicating technology, and makes to be difficult to large-scale application.And power-line carrier communication adopts line of electric force as communication media, have the existing resource of making full use of, easily construction, integrated cost low, be not subjected to advantage such as environmental baseline restriction.Because the many regional low voltage electric network distribution line of China is difficult to reach standard at aspects such as standardization, cleanliness, impedance operator, cycle, voltages, makes external product all can not meet the demands at aspects such as communication capacity, stability, reliability, antijamming capabilities.
Summary of the invention:
The purpose of this utility model provides a kind of communication line that do not need additionally to lay, economical convenient, quantities is little, adopt multiple modulation technique to carry out power line carrier communication, accurately, reliably, the ability of checking meter is strong, has mutual automatic relay and remote meter reading, the electronic single-phase of the control function of operating a switch forfeits electric carrier electric energy meter.
The purpose of this utility model is achieved in that
Electronic single-phase is forfeited electric carrier electric energy meter, its composition comprises: shell, be installed in the power circuit module in the described shell, be integrated on the pcb board by electric energy metrical module and the Power Line Carrier Communication Module that circuit is connected with described power circuit module, the front end of described electric energy metrical module is the sample of signal module, and described carrier communication module circuit comprises that carrier wave concentrator, described electric energy metrical module are connected with management centre computer with Power Line Carrier Communication Module.
Described electronic single-phase is forfeited electric carrier electric energy meter, and described electric energy metrical module adopts analog device (ADI) the electric energy chip ADE7755 of company.
Described electronic single-phase is forfeited electric carrier electric energy meter, described sample of signal module comprises voltage divider and shunt, described sampling module is connected with multiplier circuit, the product signal of multiplier is connected with electric voltage frequency (V/F) converter by circuit, sends into the carrier wave spread spectrum chip of described Power Line Carrier Communication Module by connecting circuit through the pulse of frequency dividing circuit output.
Described electronic single-phase is forfeited electric carrier electric energy meter, and described data acquisition module adopts spread spectrum compression carrier communication technology, and all communication is finished by low-voltage power line.
This technical scheme has following beneficial effect:
1. the main means that realize power line communication at present are by adopting spread spectrum communication technology (SSC) to improve antijamming capability, pure spread spectrum technic does not reach the purpose of reliable and stable communication, pure spread spectrum technic has the limitation of its range of application, and external spread spectrum communication chip all belongs to pure spread spectrum technic category.The voltage power-line carrier communication technology that this product uses is on the basis of further investigation Modern Communication Theory and external spread spectrum communication product, design at China's low voltage electric network characteristic, electric network composition, residential building distribution situation, performance index surpass like product.The core technology of this project is to utilize software to realize that the accent of signal expands and despreading, and has incorporated pattern-recognition, fuzzy control and modern signal processing technology, has expanded pure spread spectrum communication theory, has improved communication performance greatly.Carried out deep research and a large amount of experiments at aspects such as signal coupling, impedance matching, interference protection measure, networking modes, the system that guaranteed realizes reliable data communication on very noisy, impedance variation is big, signal attenuation is big line of electric force.
2. the principle of work introduction of this product:
The electric energy measurement principle of work
The electric energy that the user consumed, sample of signal by voltage divider and shunt, deliver to multiplier circuit, product signal is delivered to electric voltage frequency (V/F) converter again, send into the carrier wave spread spectrum chip through the pulse of frequency dividing circuit output and carry out pulse data processing and storage, and driven in synchronism electricity register writes down total electric weight.
The power line carrier communication principle of work
Power line carrier communication and electric energy metrical are concurrent workings, and carrier communication has four class Bao Wen (frame format), both read the parameter class, the parameter class is set, broadcast type and control class.After receiving the parameter command that reads this destination address (ID, or claim table number) when the carrier communication chip, immediately with corresponding data (as total electric weight) with band spectrum modulation carrier signal mode feed-in line of electric force.After receiving the parameter command that this destination address (ID, or claim table number) is set when the carrier communication chip, local carrier unit corresponding data (as local ident, initial electric weight etc.) will be set, parameter is provided with the hardware protection measure.
Forfeit the electric control principle of work
Carrier chip adopts bidirectional pulse signal type of drive for the control of magnetic latching relay; Then adopt single-ended level signal type of drive for the control of shunted exciter tripping isolating switch.
3. this product is compared with conventional art bigger technical progress:
3.1, electric energy metrical part is partially integrated in a pcb board, cost performance height with power line carrier communication; The hardware design that electronic single-phase is forfeited electric carrier electric energy meter will be measured partly to return with carrier communication and be drawn to a PCB circuit board, all do abundant processing on design concept and antijamming capability, and authenticate by the EMI of national electrical instrument research institute.
3.2, measure forward and reverse active energy, and with same direction accumulative total active energy.
Utilize the characteristic of analog device (ADI) the electric energy chip ADE7755 of company, accomplish the rollforward of electric energy accumulative total.
3.3, error is stable, good linearity, long-term work must adjustment;
3.4, data acquisition module adopts spread spectrum compression carrier communication technology, all communication is finished by low-voltage power line.Our design as much as possible improves the receiving sensitivity of signal, reasonably select signal(-) carrier frequency (centre carrier frequency f0=270kHz), and utilize the interference free performance of spread spectrum communication uniqueness, and effective error correction/encoding method and digital filtering technique, make and under extremely low signal to noise ratio (S/N ratio) condition, realize reliable data transmission.
3.5, constitute Automatic meter reading system with carrier wave concentrator, management centre computer.
Main website check meter management software and communication unit (abbreviation backstage)
The main website management software of checking meter is mounted in application software on each power supply department computing machine.Comprising database management module, network connecting module, long-range module, remote centralized meter-reading module, real-time monitoring module, the unmanned module etc. of being provided with.The keeper of main website can operate remote concentrator by master station computer; Also can start unmanned copy reading mode, timing automatic copy reading concentrator.Main website software can extract the user power utilization feature automatically and carry out analysis-by-synthesis, quotes suspicious phenomenon.The keeper of main website can start real-time monitoring electric energy meter function, monitors the ruuning situation of suspicious user electric energy meter in real time.
3.6, adopt the straight sequence spread spectrum communication technology (64 PN), noise resisting ability is strong, reliable communications;
Select suitable transfer rate:
Celestial farming (Shannon) formula: C=WLog2 (10 P/N)
C-channel capacity (the greatest limit speed with channel transmission information is measured)
The W-channel width
The P-signal power
N-white noise power
Shannon equation shows, under the given condition of channel capacity (C), channel width (W) and signal to noise ratio (S/N ratio) (P/N) can be exchanged.Promptly under the condition that channel capacity remains unchanged, can pass through to increase the method for frequency range, transmission information under lower signal to noise ratio (S/N ratio) P/N situation.This principle has directive significance to design of communication system, for theoretical foundation has been established in the development of spread spectrum communication communication.At present, we adopt 63 straight sequence spread spectrums codings, and message transmission rate is 300bps, and performance intuitively is about concentrator and copies and accepts 1 ammeter parameter per 1 second.Select suitable carrier frequency: centre frequency f0=270kHz, bandwidth BW=33kKHz.Select appropriate signal feed and filter network and guarantee to prevent various impact of interference on the electrical network and the destruction of thunderbolt.Improve the receiving sensitivity of special-purpose t communication chip, i.e. the ability of select-out signal from noise.
3.7, adopt multiple modulation technique to carry out power line carrier communication, accurately, reliable, the ability of checking meter is strong.
This product adopts the tailor-made algorithm of independent intellectual property right, has realized reliable data transmission on line of electric force by spread spectrum technic.Utilize low-voltage power line as data transmission channel, biggest advantage is that channel medium is existing, does not need additionally to lay communication line, and economical convenient, quantities is little.But, because low voltage electric network has impedance variation big (and having time variation), disturb strong, circuit is big to the decay of signal, and characteristic such as topological structure of electric complexity, in order to realize reliable data transmission having increased design difficulty under a kind of so comparatively abominable communication environment, this also is the technological difficulties that realize centralized automatic meter-reading.Data Transmission Feature at electrical network, the design object of this product is as much as possible to improve the receiving sensitivity of signal, reasonably select signal(-) carrier frequency (centre carrier frequency f0=270kHz), and utilize the interference free performance of spread spectrum communication uniqueness, and effective error correction/encoding method and digital filtering technique, make and under extremely low signal to noise ratio (S/N ratio) condition, realize reliable data transmission.For the characteristic of power line communication channel, increasing signal transmitting power is limited for improving the communication capacity effect, and high transmit power can be brought negative effect to the reliability of system, causes signal that the pollution of electrical network is increased simultaneously.Therefore, we have considered that all sidedly the selection of frequency and traffic rate, signal coupling, impedance matching, filter network, spreading gain and judgement threshold values etc. are all multifactor in system design
3.8, as long-range carrier meter reading terminal, can form remote auto meter reading system with carrier meter reading concentrator and master station computer, realize two-way electric energy metrical, in real time electric weight remote meter reading, electric quantity data teletransmission, realize the intelligent management of electricity consumption.
Economic benefit: the use of automatic meter reading system, can obviously control line loss.Under common line conditions, do not comprise the line loss of transformer portion in the platform district, can be controlled at 3%-5%, if surpass this value, great majority are to have tax evasion electricity feelings problem to exist in the platform district.With respect to stem-winder, for the electronics carrier wave meter, many power stealing means can't adopt, and also can reduce electric quantity loss in a certain sense.In addition, in master station computer, can monitor the ruuning situation of ammeter, resemble for management of power use department provides volume to check, and have certain deterrent force.
Management benefit: the use of automatic meter reading system, can be most basic ammeter power consumption in the management of power use department, be reflected in exactly in the computing machine, provide basic data accurately, realized the overall process computer management of electricity consumption department for management of power use department carries out business diagnosis.Robotization is checked meter and substituted manual metering is the inexorable trend of social development, and the use of centralized automatic meter-reading can bring tangible economic benefit, can bring the revolution of the management of checking meter.
3.9, stable performance, reliable, antijamming capability is strong;
Overvoltage protection: under actual operating position, exist zero line to start to exchange fire sometimes, promptly voltage is upgraded to the phenomenon of 380V, and the method to this kind situation mainly adopts the transformer withstand voltage to increase makes it under 380V voltage, can bear 4 hours normal working hours.Suitable anti-interference network: make the Recombinant Interferon of introducing from electrical network access effective inhibition.Increase lightning prevention circuit: opposing is from the high-intensity voltge surge of power end or other interface (for example telephone wire) introducing.The reliability of data:, use unique technical skill to solve at the data-storing of carrier electric energy meter inside and in up, down channel transmit.The accuracy of data: when conceptual design, guarantee the homology characteristics of data, as adopting the solution of electronics carrier electric energy meter.
3.10, have mutual automatic relay and a long-range control function of operating a switch.
Data acquisition unit makes each unit can finish the communication of bi-directional electric power line each other, thereby has the ability of mutual relaying because the duplex communication mode is replied in employing, prolongs communication distance.And can send appointment to concentrator by long-range PC, the single only table of user or many tables are forfeited electric control.Concentrator can self-teaching, the self-perfection topological structure of electric, makes the route of checking meter reach best.
Description of drawings:
Accompanying drawing 1 is this product shell synoptic diagram.
Accompanying drawing 2 is this product shell vertical views.
Accompanying drawing 3: the electrical schematic diagram that is this product electric energy part.
Accompanying drawing 4: be this product electric energy measurement fundamental diagram.
Accompanying drawing 5: the electrical schematic diagram that is this product power supply power pack.
Accompanying drawing 6: be the electrical schematic diagram that carrier signal received, sent part.
Accompanying drawing 7:FSK receiving unit electrical schematic diagram.
Accompanying drawing 8: the rear view that is accompanying drawing 1.
Accompanying drawing 9: the electrical schematic diagram that is this product carrier chip part.
Accompanying drawing 10: be this product, the electrical schematic diagram of forfeiting the collecting of electrical controls.
Embodiment:
Embodiment 1:
Electronic single-phase is forfeited electric carrier electric energy meter, its composition comprises: shell, be installed in the power circuit module in the described shell, be integrated on the pcb board by electric energy metrical module and the Power Line Carrier Communication Module that circuit is connected with described power circuit module, the front end of described electric energy metrical module is the sample of signal module, and described carrier communication module circuit comprises that carrier wave concentrator, described electric energy metrical module are connected with management centre computer with Power Line Carrier Communication Module.
Described electronic single-phase is forfeited electric carrier electric energy meter, and described electric energy metrical module can adopt analog device (ADI) the electric energy chip ADE7755 of company.
Described electronic single-phase is forfeited electric carrier electric energy meter, described sample of signal module can comprise voltage divider and shunt, described sampling module is connected with multiplier circuit, the product signal of multiplier is connected with electric voltage frequency (V/F) converter by circuit, sends into the carrier wave spread spectrum chip of described Power Line Carrier Communication Module by connecting circuit through the pulse of frequency dividing circuit output.
Described electronic single-phase is forfeited electric carrier electric energy meter, and described data acquisition module adopts spread spectrum compression carrier communication technology, and all communication is finished by low-voltage power line.
Embodiment 2:
Referring to Fig. 3: the electric energy that the user consumed, by resistance R 10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24 and C13, the signal of C14 capacitance compensation and shunt is through R25, R26 current limliting C11, the sampling of C12 capacitance compensation, deliver among the ADE7755, through the internal multiplier circuit, product signal is delivered to electric voltage frequency (V/F) converter again, through K1, K2, K3, K4, the SCF frequency dividing circuit, the pulse of F1 output, through resistance R 30 current limlitings, the E10 photoelectric coupling circuit is sent into fall into a trap row metering of carrier chip, through resistance R 31, LED shows.
Referring to accompanying drawing 5: electronic single-phase is forfeited civil power 220V among the electric carrier electric power apparent source power supply the principle figure, through the 20K51 voltage dependent resistor (VDR), connect T1-1 and T1-5, one group, through the transformer isolation step-down, and through the rectification of VC1 rectifier bridge, electrochemical capacitor C5 filtering, three terminal regulator TS2,78L05 output direct current 5V, 1 filtering of electrochemical capacitor C6 magnetic sheet capacitor C, output is for the carrier chip power supply.Two groups, through commutation diode VD1 rectification, electrochemical capacitor C7 filtering, three terminal regulator TS1,78L05 output direct current 5V, 2 filtering of electrochemical capacitor C8 magnetic sheet capacitor C, the output power supply can chip power.
Referring to accompanying drawing 6, accompanying drawing 7: electronic single-phase is forfeited electric carrier electric energy meter carrier signal and is received, sends in part, the FSK receiving unit schematic diagram
Through C40, the C41 coupling filters low frequency (alternating voltage that comprises 50H) from the carrier signal on the line of electric force (270KHZ), by middle week former limit couple a signal to secondary.P6KE22CA here, TVS1 play pulse to be suppressed, suppress on the line of electric force the bursty interference pulse and moment surge voltage, middle week play coupling, transmit signal, also play buffer action simultaneously, forceful electric power and signal circuit are isolated, make it not altogether, improve the signal antijamming capability.Its inductance value is 33UH, it and C40, and C41 forms series resonant circuit, and its oscillation center frequency is 270K, thereby has guaranteed the decay of garbage signal, and the passing through smoothly of useful carrier signal.
Carrier signal is by the secondary taking-up in middle week, through the R61 current limliting, respectively by L11, C70 and L12, series connection and antiresonant circuit frequency-selecting that C71 forms, VD2, VD3 amplitude limit, with the signal voltage clamper about 2V, signal is delivered to input end 16 pin of the frequency mixer of signal Processing analog front circuit AFE3361, AFE3361 includes mixting circuit, amplitude limiting amplifier circuit and signal transformation circuit.At first 1 pin is the local oscillation signal input pin, it goes out the 185K standard digital signals by 12 human hair combing wastes of carrier chip, inductance L 10, the antiresonant circuit that C69 forms forms the sinusoidal waveform of 185K, provide oscillator signal at the corresponding levels to mixting circuit, 270K signal mixing with 16 pin, by 3 pin output 455K mixed frequency signal, through ceramic filter CF61 filtering, waveform further improves after the filtering, sends into the amplitude limiting amplifier circuit that 5 pin are next stage, sound signal after the recovery is exported by 9 pin, send into 10 pin voltage comparators through R67 C65 R65 then behind R67,11 pin are the output of comparer, carry out shaping pulse, the enlargement factor of voltage comparator is determined by R66, signal is after treatment exported by 13 pin, and the 2 pin input signals of carrier chip ES16U just are by the carrier wave core
The relevant treatment of signal is carried out in sheet inside, has so far finished the receiving circuit Processing tasks of signal.
Referring to accompanying drawing 9, accompanying drawing 10: electronic single-phase is forfeited electric carrier electric energy meter carrier chip part, is forfeited in the collecting of electrical controls: the signal after handling through carrier chip ES16U, go out by 13 human hair combing wastes, (frequency is 270K to carrier wave digital signal after ovennodulation at this moment,) send into triode Q1 through R32 and amplify and be transformed into the simple alternating current waveform, L13, C46 forms series resonant network, with respect to its impedance infinity of 270KHz, stop the leakage of carrier signal to power supply, L13 provides operating voltage to Q1 again on the other hand, guarantees the Q1 operate as normal.4 pin in the week in C45 is coupled to of the signal after the amplification, Zhou Jinhang impedance conversion and coupling in the warp, the amplitude of signal decreases (Vp-p=11.4V) than the C level of amplifying circuit 2SD1782, and this is because TVS manages in action, through C40, the 270K signal that C41 will modulate mails to line of electric force.C40 here, C41 and middle week etc. are formed the reception and the transtation mission circuit of signal, are duplex channels transmitting signal.
Description of symbols in the accompanying drawing:
Fig. 1: 1, copper lead protection sealing nail. 2, table cover lead seal hole. 3, mechanical type register display window. 4, Power failure indicator. 5, the active energy indicator vein is jumped lights. 6, panel. 7, table cover. 8, terminal cap lead sealing The hole. 9, end button cover perforation fastener. 10, end button cover.
Fig. 2: 12, table loam cake. 13, electric current goes out. 14, electric current enters. 15, table drain pan. 16, loam cake is worn Hole copper lead protection sealing nail. 17, check pulse delivery outlet. 18, zero line enters. 19, table terminal. 20, zero line goes out.
Among Fig. 8: 21, the outer clothes-hook hole of electric energy meter. 22, electric energy meter hook. 23, the electric energy meter hook is fixed Nail. 24, electric energy meter bottom case. 25,27, the outer fixing hole of electric energy meter. 26,27, energy meter terminal is fixed The screw hole.
Claims (3)
1. an electronic single-phase is forfeited electric carrier electric energy meter, its composition comprises: shell, be installed in the power circuit module in the described shell, it is characterized in that: be integrated on the pcb board by electric energy metrical module and the Power Line Carrier Communication Module that circuit is connected with described power circuit module, the front end of described electric energy metrical module is the sample of signal module, and described carrier communication module circuit comprises that carrier wave concentrator, described electric energy metrical module are connected with management centre computer with Power Line Carrier Communication Module.
2. electronic single-phase according to claim 1 is forfeited electric carrier electric energy meter, it is characterized in that: described electric energy metrical module adopts the electric energy chip ADE7755 of ADI.
3. electronic single-phase according to claim 1 and 2 is forfeited electric carrier electric energy meter, it is characterized in that: described sample of signal module comprises voltage divider and shunt, described sampling module is connected with multiplier circuit, the product signal of multiplier is connected with electric voltage frequency V/F converter by circuit, sends into the carrier wave spread spectrum chip of described Power Line Carrier Communication Module by connecting circuit through the pulse of frequency dividing circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201156879U CN201075247Y (en) | 2007-03-05 | 2007-03-05 | Single phase electronic type cutting-supplying electricity wave carrier electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201156879U CN201075247Y (en) | 2007-03-05 | 2007-03-05 | Single phase electronic type cutting-supplying electricity wave carrier electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201075247Y true CN201075247Y (en) | 2008-06-18 |
Family
ID=39520506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201156879U Expired - Fee Related CN201075247Y (en) | 2007-03-05 | 2007-03-05 | Single phase electronic type cutting-supplying electricity wave carrier electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201075247Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912956A (en) * | 2018-09-17 | 2020-03-24 | 阿里巴巴集团控股有限公司 | Method and device for processing electric quantity information |
| CN115856423A (en) * | 2023-03-01 | 2023-03-28 | 青岛高科通信股份有限公司 | Electronic electric energy meter transformation device and meter reading system |
-
2007
- 2007-03-05 CN CNU2007201156879U patent/CN201075247Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912956A (en) * | 2018-09-17 | 2020-03-24 | 阿里巴巴集团控股有限公司 | Method and device for processing electric quantity information |
| CN115856423A (en) * | 2023-03-01 | 2023-03-28 | 青岛高科通信股份有限公司 | Electronic electric energy meter transformation device and meter reading system |
| CN115856423B (en) * | 2023-03-01 | 2023-07-07 | 青岛高科通信股份有限公司 | Electronic electric energy meter transformation device and meter reading system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20100305 |