CN1110153C - Communication system over data network of digitalized power transmission lines - Google Patents

Abstract

The present invention relates to a communication system over a data network of digitalized power transmission lines. The present invention is composed of a communication system over a combined service digital data network of digitalized power transmission lines, a communication system over a combined information data network of digitalized power distribution lines, and a communication system of remote meter reading data of a high voltage and a low voltage electric energy meters, wherein the communication systems are respectively provided with a transmission data terminal for receiving and emitting a digit. A digital signal between the terminals is connected with the transmission data terminal for receiving and emitting a digit by a computer management center. A telemetry machine data terminal for receiving and emitting a digit of the communication system of remote meter reading data of a high voltage and a low voltage electric energy meters is connected with a data interface of a remote meter reading central station of a user's electric energy meter. Data is sent through a data transmission protocol. The present invention can form an independent network for usage by oneself, and the communication systems of the present invention can mutually form a network for unified usage aiming at the existing 110KV electric distribution network, the existing 35/10KV electric distribution network and the existing low voltage electric distribution network.

Description

Communication system over data network of digitalized power transmission lines

The present invention relates to a kind of power line with the transferring electric power energy simultaneously as the system of the Digital Data Net of transmitting digital information.

Existing transmission InfoLine has cable, optical cable, microwave, satellite relay etc.It is big to build above-mentioned dedicated communication line investment, and the time is long, needs to safeguard specially.Power circuit exists in a large number, and in development constantly.Grind the examination proof, it is a kind of high-quality high speed digital information transmission line.Power line carrier function transmission arrowband analog telephone and the low-speed long-range data used already.What adopt because of its is the analogue technique that falls behind, and antijamming capability is weak, message capacity is little, speed is low, can not satisfy the requirement of power network automation, digital development.

I had invented " power line using telephone network system " and " power line using digital multi-channel phone and integrated information transmission system " in 1993,1997.In the recent period, state is extrapolated digital power line carrier and digitlization power transmission line system.There are many advantages in these Digital Electric line communication equipments and system than the simulation power line communications apparatus.But when they were used for the power circuit transmission, interference free performance was still not high enough, and speed and capacity are still big inadequately, and the scope of application is little, and equipment price height.

The object of the present invention is to provide a kind of communication system over data network of digitalized power transmission lines, it can realize that at existing 110,000 volts, 35/10 kilovolt and low-voltage network separate one-tenth net uses; The unification of can networking is mutually again used; And can on 110,000 volts of above transmission lines, transmit the integrated service digital data information.

Another object of the present invention is to provide a kind of communication system over data network of digitalized power transmission lines, it can be a kind of multichannel three tunnel high-speed figure integrated information communication systems, just telemetry system realizes the automation digital management for 35 and 10 KV distribution nets.

Another purpose of the present invention is to provide a kind of communication system over data network of digitalized power transmission lines, and it can be a kind of multichannel and road, and computer networking and real-time reliable remote data network communication system realize automation, digitlization for power distribution network.

A further object of the present invention provides a kind of communication system over data network of digitalized power transmission lines, and it can be the long-range meter reading data network of a kind of high and low pressure electric energy meter, low price communication system.

The object of the present invention is achieved like this:

A kind of communication system over data network of digitalized power transmission lines, it is made up of digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system and the long-range meter reading data communication system of high and low pressure electric energy meter, and wherein digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system connection two ends are respectively equipped with sending and receiving Digital Transmission data terminal separately; The receipts of digitlization power transmission line integrated service numerical data network communication system wherein, send out the Digital Transmission data terminal by the computer administration center of digital signal connection between digital terminal and sending out of digitlization distribution wire integrated information data network communication system, receiving the Digital Transmission data terminal connects, the receipts of digitlization distribution wire integrated information data network communication system, send out Digital Transmission data terminal and height, sending out of the long-range meter reading data communication system of low-voltage electric energy table, receiving digital telemetering machine data terminal interconnects by the computer administration center that digital signal between digital terminal connects, high, the receipts of the long-range meter reading data communication system of low-voltage electric energy table, send out the long-range meter reading central station data-interface that digital telemetering machine data terminal connects user's electric energy meter in succession, data send by Data Transport Protocol.

The computer administration center that digital signal connects between described digital terminal is connected to other digital channels.

A route ultrahigh speed smart mediation device, phone codec, direct distance dialing repeater are propped up in sending out that the sending and receiving Digital Transmission data terminal of described digitlization power transmission line integrated service numerical data network communication system is included, sync cap, superpower ability numeral error correction time-division multiplex remote data terminal and computer, digital fax, visual interface connect to form successively in real time; Signal sends through high-frequency single side band modulation, amplifier, differential transformer through intermediate frequency single-side band modulation and three road mixers again, and the revenue and expenditure road is formed through high frequency direction and single sideband filter, splitter and final synchronous demodulator.

A route tri-frequency divider of sending out, receive the Digital Transmission data terminal, eight frequency dividers, eight tunnel road strobe pulse generators, frame homogenous frequency signal generator, the seven great distance numbers of passes of described superpower ability numeral error correction time-division multiplex remote data terminal are formed according to timesharing gate and superpower ability numeral error correcting code circuitry;

Revenue and expenditure route demodulator be subjected to synchronization timing, the sign indicating number of collecting mail, tri-frequency divider, eight frequency dividers, frame swynchronization code search decoder, frame synchronization set up circuit, frame synchronization holding circuit road strobe pulse generator, the digital error decoding circuit of superpower ability and splitter and form.

The decoding rule of described superpower ability numeral error decoding circuit is: getting two in three is 1, promptly receives three bit line sign indicating numbers, and wherein two bits are identical, judge it with majority.

A route single channel integrate information terminal, single channel integrated data information first order single side-band modulator, four tunnel first group's mixers, 16 roadbed group mixers, basic group single side-band modulator, preeminent 64 road frequency spectrum built-up circuits, output power amplifier and eight tunnel preeminent and machine equipment compositions that the sending and receiving Digital Transmission data terminal of described digitlization distribution wire integrated information data network communication system is included;

Revenue and expenditure route high pass, direction band are logical, anti-final anti-synchronously device and automatic gain control amplifier, the single channel integrate information terminal receiver composition transferred of device, splitter, single channel of transferring of low noise amplifications, preeminent message pick-up, preeminent splitter, preeminent anti-accent device, basic group.

Described user reads the branch road that the electric energy meter machine comprises that single-chip microcomputer, analog switch, positive negative dc voltage interface, latch, frequency shift keyer, narrow-band pass filter and amplifying circuit, transformer are formed, also have by transformer, low noise amplifier, narrow-band pass filter, amplifier, the anti-revenue and expenditure road of transferring device, low pass filter, digital pulse shaping circuit and ternary buffering/line drive to form of frequency shift keying, finish the long-range meter reading communication equipment of user and send out with central station meter reading communication equipment and receive.

The Data Transport Protocol that described long-range meter reading central station and user read between the electric energy meter machine is:

A, central station meter reading machine are to all user's electric energy meter meter reading communication equipment photos and sending messages bit streams;

B, in certain a number electric energy meter meter reading machine package information constantly;

Among c, the whole long-range meter reading user, only have a unique function translate in this number;

D, open this number electric energy meter and read to send data; Close the electric energy meter meter reading machine of previous moment (previous number) simultaneously;

E, the long-range meter reading communication equipment of central station receiving data stream.

According to technique scheme as can be known, the present invention compares with existing digital line and analog communication system technology, has very big innovation and improvement:

1, at first, power line electric power energy and digital information simultaneous interpretation theory and realization technology have been used, transmission of large capacity high rate data digital synthesis information reliably on the Digital Electric circuit, and needn't build special communication line in addition, this has just saved tellurian resource, save investment, the time of building circuit, simultaneously the maintenance circuit has also been brought convenience.

2, adopt this method, the Digital Electric line has very big transmission of digital data information capability; On 220,000 volts and 110,000 volts of transmission lines, when distance between sites equals less than 200 kilometers, adopt ultrahigh speed smart mediation device 28 and monolateral middle and high frequency modulation and the final combined synchronous demodulation technique be with, can make the two-way 120 way digital data channels of opening of circuit every time, unidirectional general speed was 8,000,000 ratio/seconds; On 35 kilovolts or 10 kilovolts of digitlization distribution lines, when distance equaled less than 50 kilometers between station (institute), every time circuit can two-wayly be opened 512 way digital data channels, and unidirectional general speed can reach more than 34,000,000 ratio/seconds.

3, the integrated service digital terminal of succeeding in developing is on the ultrahigh speed smart mediation device basis of the usefulness of surfing the Internet, and has developed real-time synchronous digital communications interface and agreement.Like this, 121 integrated service digital terminals have just possessed following digital communication functions:

(1) computer networking data communication;

(2) fast digital fax;

(3) digital image transmission;

(4) digital time-division multi-channel long transfer of data;

(5) high-quality two-forty digital telephone.

4,, developed successfully superpower ability numeral error correction time-division multiplex remote data terminal 32 for guaranteeing grid automation data communication high reliability and few mistake or zero defect.When the total speed of the every channel of multichannel telecontrol information was 9.6～11.2 thousand ratio/seconds, the every channel transmission rate of Digital Electric line was 28.8～33.6 thousand ratio/seconds.Like this, when discrete even mistake (error code) rate of transmission channel equals less than three/for the moment, adopt " getting two in three is one " digital error correction circuit 111, fully inerrably regenerating information through receiving end.

5, be power distribution network management of power use automation and note, charge computerization, the invention provides the good long-range meter reading data network of the high and low pressure electric energy meter communication system of a kind of capacity large economy, it has following technical characterstic: adopt arrowband frequency shift data transmission, " sign indicating number divide multiaddress " table number digital encryption is multiplely checked the communication protocol that the software algorithm of reading zero defect is guaranteed in error detection, error correcting technique.Accomplish that each 3 kilo hertzs of frequency band can be for 10,000 shared channels of table, when opening ten during with upper signal channel, can be for 100,000 long-range meter readings uses of above electric energy meter.Its transmission line is 220 volts and 10 (or 35) kilovolt Digital Electric line.

The present invention is described in further detail below in conjunction with the accompanying drawing specific embodiments.

Fig. 1 constitutes block diagram for system of the present invention;

Fig. 2 is a communication system over data network of digitalized power transmission lines pie graph of the present invention;

Fig. 3 is a digitlization power transmission line ISDN communications of the present invention system pie graph;

Fig. 4 sends out the branch road pie graph for superpower ability numeral error correction time-division multiplex of the present invention remote data terminal;

Fig. 5 is revenue and expenditure road, a superpower ability numeral error correction time-division multiplex remote data terminal of the present invention pie graph;

Fig. 6 sends out the branch road pie graph for digitlization distribution wire integrated information data network communication system of the present invention;

Fig. 7 is a digitlization distribution wire integrated information data network communication system revenue and expenditure of the present invention road pie graph;

Fig. 8 transmits long-range meter reading data communication system pie graph for Digital Electric line of the present invention;

Fig. 9 is the long-range meter reading communication protocol of an electric energy meter of the present invention pie graph;

Figure 10 is the long-range meter reading communication equipment of user's low-voltage electric energy table of the present invention (data telemetry communication equipment) structural representation.

Referring to Fig. 1, the present invention is a kind of communication system over data network of digitalized power transmission lines, it is made up of digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system and the long-range meter reading data communication system of high and low pressure electric energy meter, and wherein digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system connection two ends are respectively equipped with sending and receiving Digital Transmission data terminal separately; The receipts of digitlization power transmission line integrated service numerical data network communication system, send out the Digital Transmission data terminal by the computer administration center of digital signal connection between digital terminal and sending out of digitlization distribution wire integrated information data network communication system, receiving the Digital Transmission data terminal connects, the receipts of digitlization distribution wire integrated information data network communication system, send out Digital Transmission data terminal and height, sending out of the long-range meter reading data communication system of low-voltage electric energy table, receiving digital telemetering machine data terminal interconnects by the computer administration center that digital signal between digital terminal connects, high, the receipts of the long-range meter reading data communication system of low-voltage electric energy table, send out the long-range meter reading central station data-interface that digital telemetering machine data terminal connects user's electric energy meter in succession, data send by Data Transport Protocol.And the computer administration center that digital signal connects between digital terminal of the present invention is connected to other digital channels.

As shown in Figure 2, be a kind of Digital Electric line generalization information data network communication system that need not build circuit in addition of the present invention.The 1st, from the high-voltage power line of power plant or higher level transformer station.2 is 110,000 volts of above transformer stations.The 3rd, the trap of string between 2 and 4, it stops the high-frequency information carrier signal to flow into transformer station.4 is 110,000 volts of above ultra-high-tension power transmission lines, its effect not only the transmitted electric power energy but also transmitting digital information.The 5th, filter joint, its effect is coupling high-frequency digital information signal and isolated high voltage within the digital communication equipment.In the simulation electric line communication system, trap of having set up 3 and filter joint 5 still can use in Digital Electric line communication system.The 6th, digitlization power transmission line integrated information numerical data network communication system main frame.The 7th, integrated digital information is concentrated, exchange and computer center's station equipment.The 8th, next stage transformer station, 110KV/35KV or 110KV/10KV (kilovolt) transformer station for example, the former mostly is rural power grid usefulness, and the latter is city's electrical network, claims power distribution network to open and close the station again.The 9th, 35KV or 10KV (kilovolt) trap.The 10th, 35KV or 10KV filter joint, their effect is same with 3 and 5 respectively, but equipment is simpler.The 11st, digitlization distribution wire integrated data network communication system main frame.The 12nd, numeral connects and distribution network automated computer administration center station equipment between digitlization power transmission line digital data communication system and the digitlization distribution wire digital data communication system.The 13rd, 10KV or 35KV digitlization distribution line.The 14th, city's electrical network mesohigh beginning cabinet station, or 35KV/10KV electric substation in the rural power grid.The 15th, digitlization distribution wire multichannel, multichannel integrated data network communication host.The 16th, the distribution box on the 10KV circuit (chamber) can connect 15 distribution boxs on the 10KV circuit.The 17th, be located at closing between long-range meter reading tie line of three road 220V low-voltage customer electric energy meters that distribution box transformer (10KV/220V) locates and the 10KV track data transmission information/along separate routes and jumper device.The 18th, user's low-tension supply line, each the root live wire among its zero line and A, B, the C constitutes a pair of 220V (volt) power line.The 19th, long-range meter reading data communication system of user's low-voltage electric energy table and electric supply meter, load isolation module are inductance coil in fact.The 20th, the transmission coupling of long-range meter reading machine, security personnel's module are made up of capacitor, fuse.The 21st, the long-range meter reading communication equipment of low-voltage electric energy table.The 22nd, user's low-voltage electric energy table, it is digital.The 23rd, low pressure 220V or 380V load.

The Digital Electric line generalization information data network communication system essential characteristic of being invented is that it need not build the communication system circuit in addition specially, thus investment little, set up fast, safeguard letter, and capacity is big, speed is high, good reliability.

Shown in Figure 3, for a kind of digitlization power transmission line ISDN communications of the present invention system constitutes.The 24th, general digital program controlled telephone exchange.The 25th, three switch or ad hoc automatic toll swtiching repeaters.26 and 27 is telephone signal codecs, adopts two-forty, high-quality waveform codec, and for example MC3418 or MC145540P integrated circuit are realized.The 28th, the data mediation device of commercially available personal computer online usefulness, i.e. RCV336ACF/SVD type MODEM for example.Be characterized in: two-wire system telephone wire transmitted in both directions; The information frequency spectrum is 300 to 3400 hertz, takies a standard analog telephones frequency band; The highest speed of delivering a letter was 33600 ratio/seconds; Can find the maximum possible transmission rate to satisfy error rate requirement automatically according to the circuit actual mass; These parts not only can be finished computer and digital fax communication, also can finish speech and transmit; But, it communicates the machine agreement by machine, does not have very strong real-time and do not resemble the plain old telephone.The 29th, user personal computer.The 30th, the connecting line between computer and the demodulator, interface standard is RS-232.The 31st, a kind of real-time, synchronous digital communications interface; Its characteristics are: have five connecting lines: send out, receive regularly line, send by demodulator; Photos and sending messages is sent by information source generator (for example MC3418); The breath of collecting mail is sent by demodulator; Also have single line to connect the shared ground wire of demodulator and number words information source.The information source generator is meant parts 26,27 and 32 herein.The 32nd, superpower ability numeral error correction time-division multiplex remote data terminal.26,27 and 32 all require the very strong communication of real-time.The 33rd, regulate the attenuator of level and form by three resistance.The 35th, the linear amplitude modulator of double-side band is finished by MC1496 type multiplier.The 34th, the carrier signal generator, it produces the good single frequency sinusoidal ripple signal of purity, is finished by crystal or mechnical oscillator.The 36th, the attenuator of coupling usefulness is made up of three resistance.36 and 33 variable attenuators are finished by three variable resistors.The 37th, monolateral band band pass filter is realized by LJSH-40K, LJSH-44K, LJSH-48K speech channel mechanical filter.Above-mentioned 33 to 37 modules are the monolateral band intermediate frequency Modulation of the first via, and its effect is that 28 several voice frequency spectrums of sending here are moved intermediate frequency, and the purpose of getting monolateral band is for saving line transmission frequency band.The 39th, resistor is sent the low level pilot signal from 34 through 39.38 is the second the tunnel and the monolateral band intermediate frequency Modulation of Third Road.39 to 40 devices are three road mixers, and wherein 40 is operational amplifiers.41 to 42 finish the second level with 33,35,36 devices, i.e. high-frequency single side band modulation, and wherein 41 is carrier signal generators that high frequency modulated is used, it is only high and variable at frequency of carrier signal with 34 differences, can be by changing the realization of crystal or mechnical oscillator fixed block.42 and 37 differences only are that frequency band is high and variable.The 43rd, small-signal operational amplifier, for example 1458 type amplifiers.The 44th, power amplifier.According to power transmission line distance between sites and circuit intermediateness, determine its performance number, be generally 20～80 watts, the available horsepower transistor, for example 3DA98C finishes.The 45th, high-frequency high-power output differential transformer.46 is two, four line shifting balance nets, is made of capacitor and resistor.The 47th, the overcurrent fuse.The 48th, the high voltage gas discharger.The 49th, the ground wire that earth resistance is very little, for example 0.05 ohm.The 50th, the high-frequency signal feeder line generally adopts the 1.2/4.4 small diameter coaxial cable.The 51st, withstand voltage lower, capacitor that capacity is bigger is for example about 0.1 μ.The 52nd, withstand voltage height, the less capacitor of capacity, for example 4000～10000PF.Withstand voltage is determined by the power transmission line phase voltage.The 53rd, the low frequency mutual inductor.The 54th, the interface of measurement circuit situation and capacitor situation.The 55th, earthed switch during maintenance.In the revenue and expenditure road, the 56th, high pass inductance, capacitive filter, its stop equal, less than 20 kilo hertzs of following power frequencies (50HZ), its frequency multiplication and other interference signal; By the high-frequency digital information signal more than 30 kilo hertzs.The 57th, receive direction band pass filter, the multichannel wideband digital signal that it will receive by local terminal.The 58th, low noise high-frequency wideband reception amplifier can be finished by transistor.The 59th, the monolateral band band pass filter of revenue and expenditure road multichannel and the other side send out the 42 identical of branch road.Above-mentioned high frequency filter all belongs to inductance, capacitor element is formed.The 60th, high-frequency digital information signal demodulator, to send out branch road 35 identical with the opposite end for it, also is to be finished by MC1496 or MC1596 analog multiplier integrated circuit.The 61st, above-mentioned high frequency counter modulation output signal spectrum is got monolateral band band pass filter, also is made up of inductor, capacitor.The 62nd, automatic gain level adjustment amplifier.The 63rd, capacitor, the 64th, inductor; Both form 65,66,67 3 band pass filter phase characteristic equalizing circuits along separate routes.65,66,67 and to cooperate circuit 36,58 be three way word information splitters.68 and 36 is that pilot signal is extracted circuit, is made up of LJT type narrow bandpass mechanical filter and three resistance attenuators.The 69 and 36, the 58th, pilot signal coupling amplification, rectification and filtering circuit, its effect is the pilot tone AC signal of will take out, the ratio of changing becomes dc level signal, in order to Control and Feedback amplifier 62.The 70th, manual variable potentiometer.The 71st, level indicator.It is artificial the supervision and the scope of regulating the proposition reference value.The 72nd, pilot signal, i.e. the carrier signal that intermediate frequency counter modulation is used is amplified and level adjustment circuit is made up of amplifier and potentiometer.The 73rd, the intermediate frequency demodulator, it and 68,72 realized final counter modulation synchronously.The 74th, monolateral low-pass filter is realized by resistance, electric capacity and amplifier.The 75th, amplifier and follower output, used realization circuit is identical with 43, and output level is adjustable.At last the digital audio information signal is delivered to the input of 28 demodulators.This demodulator output, incoming level are that (10)～(4) dB is an optimum value.

Essential characteristic of the present invention is: 1, existing on the transmission line that power is big, under the wide disturbed condition of frequency spectrum, taking high efficiency narrow-band digital data transmission module 28,35,37,42 and superpower ability numeral error correction multiplex data terminal 32.Big capacity, two-forty, highly reliable digitlization power transmission line integrated data communication system have been obtained; Calculate with experiment and show: be on 200 kilometers the 220000 hint roads, to adopt frequency division system at distance between sites, now may have opened 120 road bi-directional digital paths, total speed was 4,000,000 ratio/seconds; On distance between sites is 100 kilometer 110,000 hint road, can open 320 road bi-directional digital paths, total speed was 10,000,000 ratio/seconds.2, described digitlization power transmission line integrated information communication system not only can be used to transmit computer, fax, digital image information, owing to adopted real-time sync cap 31, also can transmit demanding digital telephone of real-time and teledata.

Superpower ability numeral error correction time-division multiplex remote data terminal 32 specific implementation circuit provided by the invention such as Fig. 4, Fig. 5 show.It is that its clock frequency is 28.8 kilo hertzs, sends into 77 circuit from the sending out regularly of real-time sync cap 31 that Fig. 4 sends out in the branch road 76.The 77th, the three frequency division circuit, it is by 78 double D triggers, and its model is 7474 and 79 NAND gate, and its model is 7439 formations.The three frequency division circuit is output as 9.6 kilo hertzs of commutator pulses, and a direction sends into 80, and other direction sends into 81.80 is eight frequency dividing circuits, is finished by three d type flip flops, and it is output as 1.2 kilo hertzs of timings.81 is eight tunnel road strobe signal generators, is made up of with door eight d type flip flops and 82 7 inputs, and it is output as eight 1.2 kilo hertzs road strobe pulse, and wherein first road is decided to be same step, other road and the like.The 83rd, two-divider, 84 are and door, they are input as 1.2 kilo hertzs of timings and with the step strobe pulse, export 1010 of 1.2kb/s ... the synchronizing signal of sign indicating number type.85 is the moving terminal unit interfaces of seven great distances, and interface mode is a synchronized model, i.e. 1.2 kilo hertzs of timings are given the remote terminal unit unit by this terminal, and they want 1.2 thousand ratio/seconds of information transmitted, give this multiplex terminal unit 84 and.86 is moving seven gates of 1.2 thousand information ratio/second of seven great distances.Carry out the timesharing gating by seven strobe pulses respectively.87 be one tunnel synchronizing signal and seven great distance numbers of passes according to mixer, its interior 88 be seven or, the device model is 7432.89 is Schmidt triggers of 7414 models, and its effect is to eliminate an adder or a spike that causes.The 90th, the super error correction digital encoder, by 84 with the door finish, its operation rule is: one 9.6 thousand ratio/second information code with 28.8 kilo hertzs timings with send, be 28.8 thousand ratio/seconds three joined mark.The 91st, the NRZ type produces circuit.Non-return-to-zero digital information is sent into 31 the sign indicating number inlet of posting a letter by superpower ability numeral error correction multi-channel long data terminal at last.

Superpower ability numeral error correction multi-channel long data terminal revenue and expenditure road specific implementation circuit of the present invention such as Fig. 5 show.The 93rd, from 28.8 kilo hertzs of receipts timings of the real-time sync cap output of demodulator, send into tri-frequency divider 77 and reach eight frequency dividers 80 thereafter.The 94th, from the sign indicating number sequence of collecting mail 28.8 thousand ratio/seconds of circuit upon mediation device 28 and 31 outputs of real-time sync cap, send into 95 and 112 respectively.93 and 94 digital signals are bit synchronization relations.The 95th, frame synchronizing signal search and decoder way circuit parts.The 96th, the 128 bit shifting memories that frame synchronization letter code searching is used are serial code, and it is made up of 15 74595 type 8 bit shift devices or 8 16 bit shift register, its effect be move deposit receive contain frame synchronizing signal 28.8kb/s burst.97 is four inputs and door.98 is three groups of input not gates.Add that four inputs constitute the decoding circuit of initially setting up frame synchronization with door in two groups of sequences for three group 97 with door and two group of 98 not gate; When the collection of letters thousand ratio/seconds of 28.8 in shifting memory sign indicating number bit stream 111000111000111 sequences occur just on the wiring position of design, five 99 or door output 1 entirely.It is five inputs and door that this five bit 1 is input to 100,100 simultaneously.This moment just can five with gate output terminal occur 1.2 thousand ratio/second frame synchronization believe yard 1, it is strange frame calmly; The idol frame is 0, does not translate.For anti-false frame synchronization occurs, deposit first 1 of the strange frame synchronization that finds in 101,101st, frame synchronization is set up circuit, and it is made up of with door 103 and 98 not gates eight 74595 type shifting memories 102 and eight inputs, not gate all adopts 7,406 6 inverters, forms by 7408 with door.When signal that frame swynchronization code translates is 10101010 sequences in 102 shifting memories, 103 8 with door just export first 1, think that at this moment receipts frame synchronization sets up.That this is received that frame synchronization just builds 1 sends into 104,104th again, the frame synchronization holding circuit, and it is made of eight displacement storages 102 and 105 8 inputs or door institute, or door available 7432 is formed.As long as 1 input of the frame synchronization after 104 be characterized in built at the beginning of one can keep eight frames out-of-step free.1 signal that this frame synchronization keeps is sent into five group 97 through 106 inverters on the one hand, close that this sets up initially that frame synchronization uses with door; Simultaneously send into 107 again.The 107th, set up 9.6 kilo hertzs of required timings of revenue and expenditure road road strobe signal generator and door.This has just guaranteed with to receive frame synchronization consistent correctly.The 108th, revenue and expenditure road road strobe signal generator, it constitutes identical with a branch road 81.The 109th, the revenue and expenditure road frame synchronizing signal first via, promptly with full duty 1.2 kilohertz signal in step, send into 110 with door, also form by 7408.110 is five groups three two inputs and door.Opening these is to carry out superpower ability numeral error correction computing for the frame synchronization letter sign indicating number that occurred 28.8 thousand ratio/seconds with door.The 111st, superpower ability numeral error correction physical circuit, it is only to 1 error correction of 1.2 thousand ratios that may go out, promptly receive 28.8 thousand ratio/second bit frame stream be four kinds of possible composition sequences 111,011,101,110 o'clock, all be translated into frame synchronizing signal 1.This decoding circuit is by three inputs of 7411 types and door 116, and not gate 98, four inputs or door 99 constitute.The 115th, three bits 0 are translated the physical circuit of error correcting code, it is made of 98 not gates and inverter (Shi Laite negative circuit) 116 circuit.The frame synchronization letter sign indicating number of receiving may form be 000,100,010,001, is translated into 0 entirely.The output of 111 circuit of 115 circuit and its top 99 or the door addition just draw 1010 ... sign indicating number type frame synchronization sequence, this frame synchronization sequence letter sign indicating number is only useful in relay station deciliter pipeline equipment, and join with 91 NRZs and frame synchronization interface unit and miscellaneous equipment this moment again.To information console mode terminal, the unnecessary output of frame synchronization regeneration letter sign indicating number.Remaining the second the tunnel, Third Road ... the seven the road collects mail sign indicating number from its corresponding paths output, delivers to and receives interface 85.Send with 1.2 kilo hertzs of timings.

As Fig. 6, shown in Figure 7, for a kind of speed height of the present invention, capacity digitlization distribution wire integrated information data network communication system big, good reliability realize circuit, the former is for sending out branch road, and the latter is the revenue and expenditure road.The 120th, digital time-division multichannel integrated information data terminal.The 121st, the single channel integrate information terminal, it comprises: 26 voice encryption devices, 28 ultrahigh speed smart mediation devices, 29 is computer, 30 is the RS-232 interface circuit, the 31st, real-time sync cap circuit, 32 is superpower digital error correction multi-channel long data terminal.28 demodulators output flank speed was 33.6 thousand ratio/seconds, and its information frequency spectrum is 0.3～3.4 kilo hertz.The 122nd, by the integrated data information first order single-side band modulation circuit of 28 outputs, by 33 variable attenuators, 34 cosine carrier signal generators, 35 analog multipliers, 36 attenuators, 37 monolateral band band pass filters and 39 resistance are formed.The busy line band separation of every road is 4 kilo hertzs.The 123rd, form 4 tunnel first groups by four 121 and 122.The 124th, differential transformer, effect is that four single channel are closed Lu Weichu group, circuit frequency band total linear spacing is 16 kilo hertzs.Then, four 123 are closed the road through second 124 differential transformer again is 16 roadbed groups, and total bandwidth is 64 kilo hertzs, has 16 first order modulators and finishes, with frequency spectrum shift to 128～192 kilo hertz frequency range.The 125th, second level single-side band modulation circuit, its circuit form of the composition is identical with the first order, and different is that the modulation signal of importing is 16 roadbed group signals, and spectrum position is 128～192 kilo hertzs, and carrier frequency is very high, for example is 2 megahertzes; Empty four basic group second level modulated carriers of dividing and institute's monolateral band frequency spectrum of getting entirely with, for example get upper sideband, then spectrum position is 2128～2192 kilo hertzs.The 126th, second level modulated carrier signal generator is 2 megahertzes, also can be realized by the crystal oscillator solid block greater than this value.The 127th, third level single-side band modulation, its circuit form is the same.Its task is that four 16 roadbed train frequency spectrums are moved to line transmission frequency spectrum, forms 64 tunnel preeminent frequency bands.So carrier frequency difference of four 127.128,129, the 130 and 131 carrier signal generators that are respectively them are also realized by crystal oscillator.Modulated carrier frequencies is 2224 kilo hertzs, after the modulation of basic group spectrum, takes off sideband, and then line frequency configuration is 32～96 kilo hertzs, and second three grades of modulated carriers is 2312 kilo hertzs, takes off sideband behind the accent, and line frequency configuration is 120～184 kilo hertzs.The 3rd basic group frequency spectrum shift, carrier frequency is 2400 kilo hertzs, and line frequency configuration is 208～272 kilo hertzs, and it is 2488 kilo hertzs that the 4th basic group moved carrier frequency, and line frequency configuration is 296～360 kilo hertzs.64 the tunnel is preeminent through the 3rd differential transformer 124, and closing the road frequency spectrum is 32～360 kilo hertzs.132 is 64 tunnel preeminent signal transmitting line equipment, and wherein 133 is high-frequency triode 3DA190 small signal amplifiers, the 134th, and the line direction filter is made of inductor and capacitor.The 135th, realize buffer amplifier by the 3AD98A high-frequency triode.The 136th, 3DA98C type transistor combined power amplifier.Every channel average power is no more than three watts when the circuit distance is no more than 50 kilometers, and the line power that distance is ten kilometers is less than 1 watt.The 134th, and the road device, it is to be finished for many windings high frequency transformer by elementary.This example provides eight ones 64 tunnel parallel operation transmitters, is frequency division system between them.Eight ones 64 road integrated data transmitting apparatus synthesize 512 the tunnel, and the highest total speed of circuit is two-way 17.2 million ratio/seconds, and unidirectional band bandwidth is about 2 megahertzes.Two-wayly then double.The 135th, big current fuse for example is 5A.The 136th, the high-voltage discharge short-circuiting device.135,136,137 is identical with 47,48,49 effects among Fig. 3, but parameter is different.The 137th, security personnel's ground wire requires that contact resistance is littler over the ground, for example 0.01 ohm.The 138th, the standard coaxial cable feeder line.The 139th, the protective earth switch of maintenance usefulness.The 140th, low withstand voltage large value capacitor.The 141st, inductor.The 142nd, instrument transformer.The 143rd, the interface of measurement circuitry transmission and capacitance mass change state.The 144th, high withstand voltage low value capacitor.The parameter of these devices also with Fig. 3 in different, 10KV line for example, the withstand voltage specification of capacitor is different with 220KV.

Show with above-mentioned transmitting system corresponding receiving system specific implementation circuit such as Fig. 7.The 148th, the coaxial-cable feeder that sending and receiving are shared.Sending and receiving are the frequency division system bi-directional transmission of information in this system.The 149th, revenue and expenditure road high pass filtration device, it stops 20 kilo hertzs with interfering signal by high-frequency information more than 32 kilo hertzs.36 is attenuators that three resistance are formed, and is that 150 parts match are used.The 150th, receiving directional filter, promptly the information frequency range of coming by the other side is restrained the echo that local terminal sends information.The 151st, low noise broadband transistor reception amplifier.The 152nd, the high-frequency wideband transformer that extension set is used.153 is eight ones and the receiver that connects, and every receiver is made up of with the attenuator and the high-frequency amplifier of its coupling the different inductance of frequency band, capacitor strap bandpass filter.The 154th, one the 60 tunnel preeminent collection of letters is ceased the differential transformer that frequency spectrum is divided into four 16 roadbed group information signals, these four basic groups are frequency division system, promptly each 16 roadbed group takies different line frequency configuration positions.The 155th, the demodulator of corresponding originating party third level modulation, it is by the different band pass filter in passband position, with the attenuator of its coupling, analog multiplier, for example formations such as MC1496 integrated package and amplifier.156,157,158,159 be respectively the CF signal generator that four demodulators are used, realize by crystal oscillating circuit.160 is four second level demodulators, and it is by same frequency band band pass filter, attenuator, and MC1496 analog multiplier and amplifier constitute.161 is four CF signal generators that demodulator is shared, also is made of crystal oscillator.Four 16 roadbed groups are the empty relations of dividing, and promptly carry out final counter modulation synchronously with different side circuits respectively.The 162nd, be four four road group's differential transformers just along separate routes with one 16 roadbed group.The 163rd, with each just the group be the differential transformer that the integrated data information revenue and expenditure road of four single channel is used again along separate routes.164 be four at the beginning of the group system, wherein each just the group form by four unipaths, each unipath system is made up of 165 and 166 modules.The 165th, the make a start anti-accent device of 122 first order modulation of correspondence.The 166th, the make a start receiving unit of 121 integrate information terminals of correspondence.165 comprise two parts circuit: the one, and final demodulator synchronously, the 2nd, received signal level automatic gain control circuit.The 167th, the lower sideband information signal band pass filter of second level counter modulation output, its spectral range is 128～192 kilo hertzs, each one-way passage band separation is 4 kilo hertzs, is realized by LJXH-128K type speech channel machinery hand-pass filter.The 168th, automatic gain control amplifier, the FEEDBACK CONTROL level is from 169,170 and 171.The 169th, narrow band filter and matched attenuator, it can be pilot tone and two, three grades of anti-carrier frequency error of transferring device by signal, adopts LJT type narrow bandpass mechanical filter herein.The 170th, the adjustable low frequency amplifier of level.The 171st, pilot signal rectification, filter, it receives 168 on the one hand as negative feedback DC level control 168, receives level indicator 172 on the other hand.The 27th, the digital telephone decoder.

At this, the present invention has adopted narrow-band high-speed rate data mediation device 28 and monolaterally has been with three grades of modulation 122,125,127 and corresponding monolateral band counter modulation 155,160 and arrowband synchronous demodulation 165 etc., thereby saved the digital channel transmission band and reduced noise level, improved anti-interference, obtained the big capacity of two-forty, high noise immunity.

Be power distribution network management of power use automation and electricity consumption note, charge computerization, a kind of long-range meter reading communication system of Digital Electric line transmission constitutes to be shown as Fig. 8, Fig. 9, i.e. the data telemetry communication equipment.The civil power power distribution network is to stand 110 kilovolts/10 kilovolts from opening and closing, and rural power grid is counted from 35 kilovolts/10 kv substations 8.9,10,13 be respectively inductor, capacitor and 10 kilovolt.The 14th, the high-tension switch cabinet station.The 175th, the long-range meter reading central station of high-voltage electric energy meter communication equipment, it comprises: 176 high frequency multichannel sending and receiving letter machine; 177 be 2.4 to 4.8 thousand ratio/second demodulator.One of every channel.The 178th, intelligent single chip circuit, it and multichannel demodulator and long-range meter reading computer interface.The 179th, the long-range meter reading central station computer of high-voltage electric energy meter system, it comprises: the 180th, computer; The 181st, disk or CD mass storage; The 182nd, printer output equipment.The 173rd, high-tension switch cabinet station track way outlet high-voltage electric energy meter, one of every loop line, this table are digital and intelligentized.The single-chip microcomputer of the 174th and 173 interfaces, it links with 177 again, finishes and 178 communication task.When dividing the multi-address communication agreement by sign indicating number, opened these 173 o'clock, finish the electric energy meter data of this number and read.The 192nd, 10 kilovolts/220 volts transformers of distribution box (chamber).The 193rd, this distribution box (chamber) high-voltage line outlet high-voltage electric energy meter.The 194th, the long-range meter reading trunking traffic of high-voltage electric energy meter machine, it comprises two 176,177 and 186 assemblies.The 195th, the long-range meter reading terminal communication of high-voltage electric energy meter machine, it comprises: 176,177 and 186.The 183rd, the long-range meter reading central station of low-voltage electric energy table multichannel communication machine, it is made of following module; The 184th, hf transceiver, the every channel of sender power are less than one watt, and the every channel of receiver bandwidth equals less than 4 kilo hertzs; The 185th, demodulator, every channel are two-way 300 ratio/seconds.The 186th, by the intelligent concentrator that single-chip microcomputer 89C51 software and hardware is formed, finish multi channel demodulator and 188 computer interfaces, communicate by communication protocol and user's meter reading communication equipment.The 187th, the central station of the long-range meter reading of low-voltage electric energy table, it constitutes by 188,189,190 and 191.The 188th, computer, for example 586 personal computers.The 189th, mass storage, the 190th, output equipment, for example printer etc.The 191st, to the data wire of electrically charge specialty sub-department of bank.196 is four low-voltage power lines, and a zero line and a live wire constitute a pair of 220 volts of power lines, totally three live wires.The consumer electronics power line is parallel on 220 volts of power circuits.197 is a low voltage electric network user area load and the long-range meter reading communication equipments of low-voltage electric energy table within power supply transformer station 192 scopes.The 198th, data information signal is crossed over the transformer circuit module, and it is become with 202 high frequency sending and receiving letter mechanism by 203 demodulators.The 18th, 220 volts of power circuits of low pressure.The 23rd, 220 volts of loads of user's low pressure.The 201st, the digital intelligent low-voltage electric energy table of customer charge.Though herein 202 and 203 with high-voltage electric energy meter with claiming hf transceiver and demodulator, real inequality.203 power are little, and 202 speed are low.The 204th, single-chip microcomputer, it with central station on 186 single-chip microcomputers between communicate by letter and finish long-range meter reading task.The 20th, be connected to the coupling capacitor on 220 hint roads.The 19th, the inductor of prevention high-frequency information inflow transformer or load, i.e. high frequency retardation coil.The 207th, elementary is one group of coil, and secondary is the transformer of three groups of coils.Play high-frequency information shunt, mixer effect.The 208th, receive 10 kilovolts of hf transceivers on the high-voltage power line 13, be generally the dual-capacitor coupling, connect 207 on the other hand.The 206th, be connected on the inductor at transformer place.

The long-range meter reading communication protocol of electric energy meter as shown in Figure 9, among the figure for example parameter be example with the low-voltage electric energy table.The 210th, the meter reading message bit stream that central station communication equipment 183 sends.Each user's low-voltage electric energy table communication equipment 202,203 all can receive, but only have user's electric energy meter number (password) on could 204 be translated in this communication equipment, and can open this shop's electric energy meter and read electric energy data, send to central station and receive.The 211st, certain number table will be carved the central station that carries out long-range meter reading at this moment and send packet.The bag internal information has: the 212nd, and packet header, for example 30.The 213rd, channel number, as representing with 4 bits, 16 channel numbers able to programme, the 214th, the table number that read is used 14 bit number, and in fact it is the secret letter sign indicating number number behind user's table number encrypted code.In user's receiver 204 translated is this secret letter sign indicating number number.The 215th, the information category that read, for example meter reading information branch: in time, reads (14 periods on the one), day reads, month reads, year reads, looks at random and read, and once reads, and reads or the like, represents with 4 bits for 2 times.The 216th, the bag tail takies 2 bits complete 1.Bao Changwei 27 bits.Can express user's electric energy table number number altogether is 2 ¹⁴=16384.217 is previous moment packets of 211, the 218th, constantly a packet thereafter, promptly the meter reading central station issue forward and backward adjacent between the packet of user's table number.The 219th, time reference is marked.

The 220th, the meter reading data flow of sending out to central station by each user's meter reading communication equipment.The 221st, certain is sent to the packet of central station communication equipment constantly by the meter reading communication equipment in translating.Attention: in the time of certain signal communication machine sender of opening in translating, also just closed the previous moment by the sender of meter reading.Comprise in 221 packets: the 222nd, packet header is made up of 2 bits 0; The 223rd, the meter reading data class is made of 3 bits; The 224th, electric flux numerical value, when being represented by 19 bits, can reach the electric flux greatest measure that shows is 2 ¹⁹=524288, for example define it and be 524.288Kwh; The 225th, parity check bit is expressed with 1 bit; The 226th, the bag tail is expressed by 2 bits complete 1.The 227th, previous moment, another meter reading communication equipment packets of information; The 228th, the packet data streams of back one constantly long-range meter reading machine transmission.

In order to improve reliability with credible, characteristics of the present invention are to carry out encrypted transmission, and deciphering receives.Every table communication equipment has an independently cipher code set, and letter sign indicating number in wrapping is added, deciphers, and computing is carried out in 186,204 scm softwares.Its calculating process sees that Fig. 9 shows.The 229th, unencrypted letter sign indicating number, it comprises packet header 230, bag literary composition 231, bag tail 232, they can be corresponding with last figure package information.The 233rd, the pseudorandom cipher sequence, its Bao Changyu 229 equates, but to wrap tails be known in 234 packet header and 236, for example is complete 0, not encrypted code.The 235th, pseudo noise code password packet sequence, bit number equate with 231, for example are 23 bits.The pseudo-code number of permutations of issuable 23 bit long is 2 ²³-1=8388607, each household table number and meter reading information select a pseudo-code to arrange.The 237th, mould two false add algorithms, i.e. 0 1=1,1 0=1,1 1=0,0 0=0.Arrow is the bit stream transmission direction among the figure.The 238th, encrypt the bit information flow that transmit the back.239 and 230; 241 and 232 correspondent equals; 240 do not equate with 231, but [231] [235]=[240], [240] are encrypted bitstream.The 241st, the mould two false add algorithms of receiving end deciphering usefulness, the 244th, receiving end password bit sequence 233 equates with making a start, so [244] [240]=[229] solve the package informatin bit stream of transmission.

Another characteristics of the present invention are to guarantee the correctness of long-range meter reading data, have taked multiple superpower digital error checking and correction (ECC) technology for this reason: at first be the correctness of determining to receive package informatin with parity check code, if to then depositing it, otherwise retransmit; The package informatin of receiving for the second time of sending is checked check code earlier right once more, if retransmit then finishing, otherwise retransmits once more, and general the repeating transmission is no more than 4 times.During to 4 transmitting-receivings, take to get in four three error correction again and receive.

The invention is characterized in: because of the speed of demodulator is low, can adopt shift frequency to send narrow-band reception, strong interference immunity, and user capacity is big.Above-mentioned each each household meter reading amount of information is 27 bits, and circuit transmission data are 108 bits.Read to calculate on time, one day 14 period, be used for carrying out in wherein nearly 10 hours day, month, year, with machine-readable.Like this, average every table per hour the circuit transmitted data amount be 108 bits.When adopting 300 bps demodulators, it is 10,000 that then every channel can hold user's low-voltage electric energy table number.

The long-range meter reading communication equipment of user's electric energy meter of 220 volts of power lines of a kind of usefulness of the present invention and high-voltage power line transmission is specifically realized circuit as shown in figure 10.The 300th, user's low-voltage electric energy table, this table has long-range meter reading interface for the digital intelligent ammeter.The 301st, the 89C51 type single-chip microcomputer in the long-range meter reading communication equipment.Numeral 89C51 exit in 301 frames number.302 is 11.0592 megahertz crystal, the 303rd, and capacitor, the two constitutes the external oscillator of 89C51.The 304th, the TL182 analog switch.The 305th, on the occasion of direct voltage, open the ammeter reading and use.The 306th, negative value direct voltage, reading are finished and are closed ammeter usefulness.307 is 74373 types, eight D-latchs.308 is the ternary buffering/line drives of 74244 types, eight homophases.Long-range meter reading process is as follows: by above-mentioned communication protocol, receive the meter reading information packet that central station is sent, be input to single-chip microcomputer through 308, after translating, send high level through 25 pin, 304 require electronegative potential logical, so through not gate, get through 305 dc positive powers and be input to electric energy meter, this promptly is that the beginning signal is opened in meter reading.Send into through single-chip microcomputer 1 pin again and require meter reading kind of information data, after this send electric quantity data to single-chip microcomputer 2 pin by microcomputer in the table.At last by single-chip microcomputer with packing data, 11 pin through 301, by 307 outputs, upper signal channel sends.After reading was finished in electric energy meter, single-chip microcomputer sent instruction from 26 pin, negative supply 306 is connected with electric energy meter can be closed electric energy meter to external data output.The 309th, frequency-shift modulator is finished by SE/NE-567 high stability low frequency integrated phase-locked loop.Numeral in the square frame is a pin number.The 310th, resistor, the 311st, capacitor, the two decision carrier oscillation frequency.This carrier frequency value is in 100～500 kilohertz range.The 312nd, electrolytic capacitor, the 313rd, ordinary capacitor.The 314th, model is 8050 transistor.The 315th, positive 8 volts of direct voltages.The 316th, high freguency bandpass filter, centre frequency and carrier frequency with, pass band width is 3 kilo hertzs, can be realized by 4 inductors and 4 capacitors or ceramic filter.317 is transistors of 945 types.The 318th, retardation coil.The 319th, semiconductor diode.The 320th, model is the D669A transistor.The 321st, model is the transistor of D1138.Above-mentioned two triodes are done radio frequency power amplifier and are used.The 322nd, power is two watts resistance.323 is the non-polar condenser of 1 microfarad.324 is three groups of coil high frequency transformers.The 325th, inductor in high frequency.The 326th, withstand voltage is 630 volts capacitor.The 327th, fuse.328 is 220 volts of 50 hertz of AC power line jacks.305 is 12 volts of DC power supply.The 330th, revenue and expenditure road high frequency transformer.331 is transistors of 9014 models.The 332nd, band pass filter, the passband bandwidth is 3 kilo hertzs, also be made of pottery or inductance and capacitive filter, but the passband position is different with local terminal hair band logical 316.But depend on that the central station hair band leads to frequency.333,334 and 335 3 resistance constitute matched attenuator.The 336th, the demodulator of shift frequency modulation adopts the demodulation of phase locking technology, is also finished by SE/NE-567 phase-locked loop integrated package.334 resistance and 340 two capacitors constitute low pass filter, output low frequency digital pulse signal.The 337th, phase-locked indicating device, when on the carrier frequency that the oscillator locking on this revenue and expenditure road is receiving, these 567 integrated package, 8 pin become low level by high level, become high level through inverter, and indicator light is bright.338, the 339th, the resistance and the capacitor of the external oscillator of SE/NE-567 integrated circuit, its value is by receiving the carrier frequency decision.The 341st, model is 7419 six anti-phase Schmidt triggers, and its effect is that the digital pulse signal that demodulator is exported is carried out shaping.

The 343rd, the localpower transformer.The 344th, rectistack.345 is that three of 7812 types are rectified 12 volts of pressurizers.346 is negative 12 volts of pressurizers of three ends of 7912 types.The 347th, filtering is with the electrolytic capacitor of high capacitance value.The 313rd, non-polar condenser.The 305th, positive 12 volts of DC power supply.The 348th, dropping resistor, about 1 watt of power.The 306th, negative 12 volts of DC power supply.The essential characteristic of this patent circuit is used few, the good economy performance of components and parts, integrated package.

Claims (8)

1, a kind of communication system over data network of digitalized power transmission lines, it is made up of digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system and the long-range meter reading data communication system of high and low pressure electric energy meter, it is characterized in that: digitlization power transmission line integrated service numerical data network communication system, digitlization distribution wire integrated information data network communication system connection two ends are respectively equipped with sending and receiving Digital Transmission data terminal separately; The receipts of digitlization power transmission line integrated service numerical data network communication system wherein, send out the Digital Transmission data terminal by the computer administration center of digital signal connection between digital terminal and sending out of digitlization distribution wire integrated information data network communication system, receiving the Digital Transmission data terminal connects, the receipts of digitlization distribution wire integrated information data network communication system, send out Digital Transmission data terminal and height, sending out of the long-range meter reading data communication system of low-voltage electric energy table, receiving digital telemetering machine data terminal interconnects by the computer administration center that digital signal between digital terminal connects, high, the receipts of the long-range meter reading data communication system of low-voltage electric energy table, send out the long-range meter reading central station data-interface that digital telemetering machine data terminal connects user's electric energy meter in succession, data send by Data Transport Protocol.

2, communication system over data network of digitalized power transmission lines according to claim 1 is characterized in that: the computer administration center that digital signal connects between described digital terminal is connected to other digital channels.

3, communication system over data network of digitalized power transmission lines according to claim 1 is characterized in that: a route ultrahigh speed smart mediation device, phone codec, direct distance dialing repeater are propped up in sending out that the sending and receiving Digital Transmission data terminal of described digitlization power transmission line integrated service numerical data network communication system is included, sync cap, superpower ability numeral error correction time-division multiplex remote data terminal and computer, digital fax, visual interface connect to form successively in real time; Signal sends through high-frequency single side band modulation, amplifier, differential transformer through intermediate frequency single-side band modulation and three road mixers again, and the revenue and expenditure road is formed through high frequency direction and single sideband filter, splitter and final synchronous demodulator.

4, communication system over data network of digitalized power transmission lines according to claim 3 is characterized in that: a route tri-frequency divider of sending out, receive the Digital Transmission data terminal, eight frequency dividers, eight tunnel road strobe pulse generators, frame synchronizing signal generator, the seven great distance numbers of passes of described superpower ability numeral error correction time-division multiplex remote data terminal are formed according to timesharing gate and superpower ability numeral error correcting code circuitry;

The receipts synchronization timing of revenue and expenditure route demodulator, the sign indicating number of collecting mail, tri-frequency divider, eight frequency dividers, frame swynchronization code search decoder, frame synchronization are set up circuit, frame synchronization holding circuit, road strobe pulse generator, superpower ability numeral error decoding circuit and splitter and are formed.

5, communication system over data network of digitalized power transmission lines according to claim 4, it is characterized in that: the decoding rule of described superpower ability numeral error decoding circuit is: getting two in three is 1, promptly receive three bit line sign indicating numbers, wherein two bits are identical, judge it with majority.

6, communication system over data network of digitalized power transmission lines according to claim 1 is characterized in that: a route single channel integrate information terminal, single channel integrated data information first order single side-band modulator, four tunnel first group's mixers, 16 roadbed group mixers, basic group single side-band modulator, preeminent 64 road frequency spectrum combiner circuits, output power amplifier and eight tunnel preeminent and machine equipment compositions that the sending and receiving Digital Transmission data terminal of described digitlization distribution wire integrated information data network communication system is included;

Revenue and expenditure route high pass, direction band are logical, anti-final anti-synchronously device and automatic gain control amplifier, the single channel integrate information terminal receiver composition transferred of device, splitter, single channel of transferring of low noise amplifications, preeminent message pick-up, preeminent splitter, preeminent anti-accent device, basic group.

7, communication system over data network of digitalized power transmission lines according to claim 1, it is characterized in that: described user's electric energy meter meter reading machine comprises single-chip microcomputer, analog switch, positive negative dc voltage interface, latch, frequency shift keyer, narrow-band pass filter and amplifying circuit, the branch road that transformer is formed, also have by variable, low noise amplifier, narrow-band pass filter, amplifier, the anti-device of transferring of frequency shift keying, low pass filter, the revenue and expenditure road of digital pulse shaping circuit and ternary buffering/line drive composition is finished the long-range meter reading communication equipment of user and is sent out with central station meter reading communication equipment and receive.

8, communication system over data network of digitalized power transmission lines according to claim 1 is characterized in that: the Data Transport Protocol that described long-range meter reading central station and user read between the electric energy meter machine is:

A, central station meter reading machine are to all user's electric energy meter meter reading communication equipment photos and sending messages bit streams;

B, one constantly certain number electric energy meter meter reading machine transmit package information;

Among c, the whole long-range meter reading user, only have a unique function translate in this number;

D, open this number electric energy meter and read to send data; Close previous moment simultaneously, be the electric energy meter meter reading machine of previous number;

E, the long-range meter reading communication equipment of central station receiving data stream.

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