—-Abstract: In view of when the Shengli Oilfield electrical power system between different type power line carrier communication equipment connection and network meets the technical question, introduced separately ZBD-3B and the ZJ-5 wave carrier from the shifting plate connection’s work and the transfer principle, how from does carry on the voice and the call control signal the analysis angle which combines and isolates, proposed the sound switches over oral plate’s principle of design and the method, and manufactures smoothly and debugs successfully, has solved the sea transformer substation and the control center correspondence question.
Key word: Wave carrier; From shifting plate; Connection; Design
Introduction
The Shengli Oilfield electrical network is the nation at present one of biggest enterprise electrical networks, and strengthens along with the oil field electrical network specialization management’s further deepening, corresponds the special net as the oil field electrical power system important component’s electric power is getting more and more important in the entire electrical network movement and the management status. As a result of the historical reason, in the Shengli Oilfield electrical power system communications network’s partial electric power special-purpose communication equipment in designs and in the technology already appears at present is relatively obsolete and is backward, causes between each kind of different equipment’s connection and the network function cannot satisfy the physical demand well. For example the power line carrier communication equipment uses now the main type is ZBD-3B and the ZJ-5 wave carrier, although transmission path part rational design, stable property, but its automatic exchange part takes with between other device attachment or the wave carrier network’s important connection, because of the productive time, the connection design aspect type are early few, the technology is backward, specially ZJ-5 wave carrier, in met with the ZBD-3B wave carrier when shifting plate’s audio frequency transfer network connects is inconvenient. This affected the entire power line carrier communication stability and unimpeded to a great extent, has restricted the electric power dispatch security and the economical movement.
To improve the equipment positively, the safeguard entire power line carrier communications network highly effective and the reliability service, we through independent development design, in the wave carrier network aspect has solved oil field new orphaned transformer substation ZBD-3B successfully and the ZJ-5 wave carrier different audio frequency transfer question from shifting plate’s between. In the electric power communication facility tapping latent potentialities efficiency, reduced aspects and so on cost and new function development has created the good benefit. 
Question statement
In the Shengli Oilfield electric power communications net the electric power carrier equipment has 2 types, namely ZBD-3B and ZJ-5 wave carrier. For guarantee entire electric power carrier communication network complete reliable and dispatcher telephone’s unimpeded, in the partial transformer substations must solve network connection problem well between the different type carrier equipment’s, meets the actual problem is solves new orphaned transformer substation ZBD-3B and the ZJ-5 wave carrier different transfers the network connection question sound from shifting plate’s, safeguards the control center and the new orphaned transformer substation and the sea power transformation interstation reliable telephone communication.
What new orphaned transformer substation original use is the early ZJ-5 wave carrier, the sea transformer substation is the newly built transformer substation, is apart from the control center to be away from remotely. In order to complete with the control center carrier-current communication, considered that by new changes takes orphaned the transit exchange, is operational the ZBD-3B wave carrier, applies the microcomputer from the shifting plate. But ZJ-5 wave carrier does not have the 4W E/M connection way from the shifting plate, only then 4 sounds transfer the mouth, therefore in new changes orphaned needs makes the electric circuit transformation and the design to 4W E/M and between the 4W way connection connection, like Figure 1.
the 4W E/M sound transfers the mouth the voice return route separately and “four receives” the transmission by “four rounds”, the signaling separately by way of the E line and the M line transmission, but the 4W sound transfers the mouth voice signal and the signaling signal is in identical to on-line transmission, therefore between them the connection method theoretically speaking is “the parting line system” transforms 4W E/M by the 4W connection recognition “the collinear system”, perhaps “the collinear system” separates “the parting line system which” the 4W connection 4W E/M needs.
The sound transfers the connection design proposal
As mentioned above, new changes orphaned in the oil field needs to solve the ZBD-3B wave carrier from the shifting plate and the ZJ-5 wave carrier from shifting plate’s transfer question. First analyzes next 2 kind of connections the working.
* ZBD-3B wave carrier from shifting plate 4W E/M connection working [1]
the 4W E/M relaying connection uses generally at present in the switchboard and between transmission system’s audio frequency terminal device, the 4W expression four-wire system voice transmission connection, E and M indicated separately uses to receive and the transmission mode signal E/M pilot wire. What the E/M pilot wire itself transmits is the direct-current signal, its transmitting range is limited. Therefore often needs through transmission facility’s signal terminal, transforms E and the M pilot wire’s status signal is advantageous the signal which transmits in the transmission system, generally transmits outside in the transmission voice signal frequency band’s frequency band, like this, E/M pilot wire’s signaling not distance limit.
The M line’s function mainly transmits the line supervisory signal. In the short distance, the switchboard and the switchboard direct connection, line sends out the line supervisory signal from calling end switchboard E/M the relaying interface circuit’s M, like takes, the release, the answering signal, the line start is been called to carry E/M the relaying connection the E line, sends out the call request signal, is been called the end switchboard to prepare to receive and to process calls, vice versa. When from far, as a result of the voice weaken and the E/M interface circuit cocurrent loop resistance’s limit, between the switchboard needs through the long-distance transmission circuit, like transmission circuits and so on microwave, carrier. By now calling subscriber switchboard E/M the relaying interface circuit’s M line controlled the calling subscriber transmission circuit signal unit the M line, like this step by step passes to the called subscriber transmission circuit signal unit the E line, starts again is called the end switchboard, vice versa. M line’s other function is uses in transmitting the dial pulsing DP signal. In relays in the interface circuit often to need to transmit one kind the called subscriber number which expressed with the dial pulsing DP signal cabin off and on, this kind of signal is by way of generally the M line transmission.
The E line uses in receiving the control signal which sends to the end switchboard M line or the signal unit, the release, the reply, the confirmation and the dial pulsing DP signal and so on. The E line belongs by the pilot wire, receives and completes the M line the control function.
* ZJ-5 wave carrier from shifting plate 4W connection working
ZJ-5 the wave carrier 4W sound transfers the mouth the voice signal and the signaling signal is in identical to on-line transmission, what the 4W way adopts is the closed loop split-ring signaling way and the direct-current pulse digit dialing way. Figure 2 is the armor stands through second grade stands (transit exchange) to carry on the transfer to the third station the situation, in the chart, the second grade 1 machine and the second grade 2 machine users 1 is switches over the user.
* ZBD-3B and the ZJ-5 wave carrier’s sound transfers the connection design
As mentioned above, completes between the different carrier type for in the new orphaned transformer substation the different sound to transfer the connection the connection, must carry on the redesign to the corresponding electric circuit and transform, causes the 4W E/M connection and the ZJ-5 wave carrier sound transfers the connection the signal to be possible to transform mutually, thus completes the control center user and new changes orphaned and the sea changes between the carrier telephony user the automatic call.
Two kind of connections which says from front when uses in the audio frequency transfer the working and the signal condition may see, two seed grafting verbal message number transforms mutually the key lies to E, M two control signal processing and the transformation, how carries on the 4W voice signal and the call control signal the combination and the isolation is the circuit design transformation key.
Considered under the new orphaned transformer substation the telephone channel request, must retain the ZJ-5 wave carrier from the shifting plate. In the retention from shifting plate’s situation, two methods may realize the above transformation: One kind is makes the transformation to the ZJ-5 wave carrier from the shifting plate, one kind is other design manufacture together sound transfer oral plate, adds, in ZBD-3B wave carrier’s 4W E/M connection and ZJ-5 from shifting plate’s 4W sound transfers between the connection. The preceding method transformation wiring is more tedious, must affect the wave carrier from shifting plate’s function and the use, the latter method can maintain the original dispatching system custom use the way, does not change wave carrier’s original performance and the wiring, does not have any influence to the dispatching communication.
The surface is the sound switches over oral plate’s design, the manufacture and the debugging process.
(1) meets oral plate’s circuit design
in the 4W E/M connection E, the M line transmission is the direct-current ring circuit signal, including takes, the release, the answering signal and so on, E pilot wire interface circuit M line control, and needs certain drive current. Therefore, in the 4W signal the voice logical circuit call control signal’s separation and the combination may consider that uses the inductance and the capacitance section realizes.
E, in the M line transmits the line signaling, including the M on-line dial pulsing signal, may consider that uses the tip the movement transformation is the closed loop split-ring signaling way which and the direct-current pulse digit dialing way the 4W way requests. Figure 3 is meets oral plate’s circuit diagram.
When the sea changes the ZBD-3B wave carrier user calls primarily, new orphaned changes the ZBD-3B wave carrier user for is called, new changes orphaned the wave carrier receives the number which the sea changes sends in 9, namely takes the ZBD-3B wave carrier to transfer 1 connection from the shifting plate sound, delivers “” the signal by in 4W E/M line M1 for to meet oral plate’s M terminal, the J1 relay operates immediately, after the J1 contact attracts gathers, transforms the closed loop signal to pass to the sea changes the ZJ-5 wave carrier from shifting plate’s user 1 connection, the wave carrier sound transfers the electric circuit to complete takes off the process.
When the sea changes the user starts the digit dialing, the dial pulsing by off and on “” the way from meets oral plate’s M line to enter meets the oral plate, causes relay J1 off and on to operate, the J1 contact will transform the closed loop signal to pass to the ZJ-5 wave carrier, the wave carrier sends the bell electric circuit with it correspondence bell frequency signal sending-out control center, the control center user ringing, and will deliver the ring-back tone changes the user to the sea.
The control center user opens the machine-hour, the line signal stops, and delivers the closed loop signal changes to the sea the ZJ-5 wave carrier transfers 1 connection from shifting plate’s sound, connected meets oral plate’s sound with it to transfer the mouth is also the closed loop, relay J2 operates, the E line sends out “” the signal changes to the sea the ZBD-3B wave carrier from shifting plate’s E1 line, by now, the control center user and the sea changed the user arrive at the telephone conversation condition.
When bilateral telephone conversation, the sea changes the user the voice signal from “four heals” enters meets the oral plate, after electric capacity C1, C2 enters ZJ-5 wave carrier user 1, passes through the wave carrier sending a letter leg sending-out control center user again. The control center user’s pronunciation enters the ZJ-5 wave carrier’s sound by the receiving leg to transfer 1 connection, transfers the mouth from the sound to enter meets the oral plate, after electric capacity C3, C4 enters the sea changes the ZBD-3B wave carrier “four round of mouths”, from this constitutes the receiving and dispatching separated four talking circuit.
When the sea changes the user does calls, opens machine the signaling from the control center wave carrier user to send, changes by the sea the ZJ-5 wave carrier transfers 1 connection from shifting plate’s sound to enter meets the oral plate, transforms after the J2 relay passes to the ZBD-3B wave carrier by “” the signal from shifting plate’s E1 line, the dial pulsing way and above same.
When bilateral users over and out opened the line restoration, if were the sea changes the user the first on-hook restoration, in new orphaned changed sends in meets the oral plate M line “” the loss of signal, met the oral plate relay J1 release, its contact split-ring, caused the ZJ-5 wave carrier corresponding subscriber circuit and other electric circuit restoration. If is the control center user the first on-hook restoration, then new will change orphaned the ZJ-5 wave carrier sound transfers 1 connection first to receive the split-ring signal, will thus cause meets the oral plate J2 relay de-energized, “” the signal will stop for the E line delivers, the ZBD-3B wave carrier will recover correspondingly from the shifting plate, circuit entire line restoration.
(2) connection circuit wafer manufacture
Met the oral plate circuit design to finish, the next step work was the circuit wafer manufacture. First determines the board the size. Because meets the oral plate is installs, in new changes orphaned the carrier communication engine room 2 ZBD-3B and between the ZJ-5 wave carrier, meets the oral plate to be possible to install on any kind of rack, considered ZBD-3B machine also has free time slot position, therefore the choice and ZBD-3B machine inserts general scrutinizes the same size board, then drew the board circuit diagram according to the circuit diagram, the request Department concerned has manufactured.
Primary device’s choice. C1, C2, C3, C4 select CL20-160V-2μF the high quality polyester fiber electric capacity, the inductance select 125mH, the diode choose 1N4007, the relay to choose DS2E-S-DC24V.
Welds the above part in manufactures on the good board, draws out 4 to send, 4 to receive, the M line, the E line and with the registered permanent address wiring, the sound transfers the mouth wiring, - the 24V power-supply wiring, makes the label. Makes an appropriate back plate front end the board, labelling “the sound transfer oral plate”, inserts in a ZBD-3B rack’s dead slot.
(3) meets oral plate’s debugging
Meets oral plate’s lead-out wire 4 to send, 4 to receive, the M line, the E line and the ZBD-3B machine rack from shifting plate JX2 post 4F1, 4S1, Me1, the E1 docking, the Mc1 post earth. The lead-out wire with the registered permanent address wiring, the sound transfers the mouth wiring and the ZJ-5 rack transfers 1 terminal docking from shifting plate’s user 1 chord, - the 24V power line meets the ZBD-3B machine power source.
After the connection finished, has carried on the experiment which the electric circuit cleared. According to the digit dialing way which the sound transfers, the control center user and the sea change the user have carried on the mutual digit dialing and the telephone conversation, discovered that takes off, the digit dialing and the recuperation basic normal, but the telephone conversation static is big, the volume is small. After meeting the oral plate introduction creates the transmission level weaken result after the analysis, according to two wave carrier four circuit’s receiving and dispatching level requests, has adjusted two rack’s four receiving and dispatching attentuators, after experiment connection quality obvious change for the better.
Concluding remark
The sea transformer substation is one newly built located at the seashore remote 110kV transformer substation, is away from the control center more than 100 kilometers, the surroundings not any communication link, the production initial period and the control center dispatching communication has 1 Blower telephone. Same time newly built and new changes orphaned after electric power carrier communication, in new changes orphaned using the manufacture sound transfer oral plate may complete 2 type wave carrier’s transfer, thus may establish the sea transformer substation and the control center information link, such sea transformer substation’s carrier telephony may enter the control center the switching network. In sea transformer substation ZBD-3B wave carrier application microcomputer after the shifting plate, might change for the sea increases 4 telephones, in the station corresponds also obtained the corresponding solution. From now on other transformer substations like will meet the similar transfer question, may apply and promotes this plan solve.
