CN2153171Y - Diphonia multi-frequency distant trip signal transmission interface apparatus - Google Patents

Diphonia multi-frequency distant trip signal transmission interface apparatus Download PDF

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Publication number
CN2153171Y
CN2153171Y CN 93202887 CN93202887U CN2153171Y CN 2153171 Y CN2153171 Y CN 2153171Y CN 93202887 CN93202887 CN 93202887 CN 93202887 U CN93202887 U CN 93202887U CN 2153171 Y CN2153171 Y CN 2153171Y
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signal
circuit
frequency
dual
tone
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CN 93202887
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Chinese (zh)
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张志宏
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Abstract

The utility model belongs to the technical field of the relay protection of a power system, comprising the interface device of an emitting terminal and the interface device of a receiving terminal. The utility model is characterized in that the circuits of the interface device of an emitting terminal comprise a signal switching circuit, a signal indicating circuit for an input command, a dual-tone multi-frequency signal generator, an amplifying and matching circuit and a monitoring circuit for electric level; the interface device of a receiving terminal comprises a dual-tone multi-frequency signal receiving circuit, a receiving circuit for a monitoring signal, a digital logic circuit, an alarming circuit for signal indication / abnormality, the amplifying and matching circuit and an exit relay. The utility model overcomes the deficiency that the existing high-frequency distant tripping device of a power line, and has the advantages of strong anti-interference ability and high reliability.

Description

Diphonia multi-frequency distant trip signal transmission interface apparatus
The utility model relay protection of power system technical field particularly relates to a kind of remote tripping signal transmission interface device.
The remote tripping signal of China's transmission at present normally utilizes the power line hf channel of 40--500KHZ, is realized by the high frequency remote tripping device.JYT-81 type remote tripping device and the Yangzhou telecommunication YTX-1 of instrument plant type remote tripping device as Nanjing Automation Research Institute.Problems such as these tripgears utilize the variation of having or not of high-frequency signal or frequency to transmit trip signal, exist antijamming capability relatively poor, and reliability is lower.When the power line of transmitting high-frequency signal broke down, high-frequency signal may be blocked, and caused protective device tripping accident.Power line hf channel frequency is crowded day by day in recent years in addition, disturbs increasingly, makes the application of power line high frequency remote tripping device be subjected to influence to a certain degree.
The purpose of this utility model is the weak point that overcomes existing power line high frequency remote tripping device, and a kind of not electrification line transmitting high-frequency signal and antijamming capability is strong, reliability is high trip signal transmission interface device are provided.
The utility model is divided into make a start interface arrangement and receiving end interface arrangement.Interface arrangement and the receiving end interface arrangement external structure of making a start is made up of shell, circuit board, standard plug, reset switch and various signal lamp respectively.The circuit part of interface arrangement of making a start comprises signal switching circuit, input command indicating circuit, dual tone multi-frequency signal generator, amplification matching circuit and level monitoring circuit.For protective device is avoided that forceful electric power disturbs or damaged, be provided with photoelectrical coupler at the input of the interface arrangement of making a start and isolate.Dual tone multi-frequency signal generator is made up of ic chip and quartz crystal, can obtain f 1--f 88 signal frequencies, frequency range is at 300HZ--2400HZ.These 8 signal frequencies make up in twos can form trip signal 1, signal 2, signal 3 and supervisory signal.Signal switching circuit is by ic chip 1, IC 2, and IC 3Form, this part circuit is responsible for the priority that trip signal switches and determine trip signal, and signal indicating circuit is by ic chip 8, IC 9Constitute with elements such as 3 d type flip flops and light-emitting diodes, in order to the trip signal of power supply and input is indicated.Amplification/match circuit is made up of elements such as ic chip and transformer B, is used for signal is amplified, and obtains required output level, and finishes imbalance/balanced transformation.The level monitoring circuit is by ic chip 7Form with element such as diode D, it detects output signal level, when output level has reduced dB than rated value, sends alarm indication signal automatically.
Receiving end interface arrangement circuit part comprises the touch-tone signal receiving circuit, supervisory signal receiving circuit, Digital Logical Circuits, signal indication/abnormality alarming circuit, amplification matching circuit, AND circuit and exit relay.Coupling/amplifying circuit is by audio frequency transformer B1 and ic chip 1Constitute Deng element, in order to finishing the balance/imbalance conversion, and the signal that receives is amplified.The touch-tone signal receiving circuit is by ic chip 5With simple signal receiving circuit IC 3, IC 4, form.IC 5DTMF high and low frequency band pass filter is contained in inside, zero-crossing detector, frequency digital detector, code conversion and latch, functional units such as crystal oscillator and control and monitoring logic.Work as IC 5Receive f 1And f 5During the supervisory signal formed, its four figures is exported 0001 code character according to output; When it received trip signal 1,2 or signal 3, its data output end was exported 0101,1001 or 0000 code character respectively, these data was delivered in the Digital Logical Circuits of back and was handled, and just can revert to various trip signal signals.When the frequency of touch-tone signal was higher, its demodulation speed was also very fast, when the transmission quality of telecommunication circuit when higher, can improve demodulation speed by raising make a start interface arrangement and receiving end interface arrangement and quartz crystal frequency to signal.Digital Logical Circuits is by ic chip 6, IC 7, IC 8, IC 10, IC 11, IC 12, IC 13Form with elements such as diode, resistance, the main effect of this part circuit is ic chip 3, IC 4And IC 5The signal that demodulates carries out comprehensive distinguishing and decoding, reverts to various trip signal signals.
The course of work of receiving end interface arrangement is as follows:
When not sending out trip signal when making a start, what the receiving end interface arrangement received is by f 1And f 5The supervisory signal of forming, IC at this moment 3And IC 4Equal output low level, IC 5Q 4Q 3Q 2Q 10001 yard of end output is through IC 6And IC 7Carry out level and promote, deliver to IC 8, make IC 89 pin output high level.These level signals all can make IC 11Output low level signal, thereby locking IC 12And IC 13Input, the device can not move.When sending the trip signal signal when making a start, IC 3And IC 4All export high level signal, IC 5Export 0101 yard, make IC 89 pin become low level, 6 pin become high level.At this moment, IC 11Output become high level immediately, remove IC 12And IC 13The locking of input makes IC 8The high level of 6 pin output pass through IC 12, through R 16And C 13The 3mg delay circuit of forming passes through IC again 13, drive triode T 6, make the outlet relay J 1The demodulation of trip signal is finished in action, decoding and output.
The utlity model has following advantage:
1. Transmitting and Receiving End interface arrangement of the present utility model can be modulated into the strong dual-tone multifrequency frequency-shift type audio signal of antijamming capability to trip signal, can utilize various voice-grade channels to transmit.
2. the utility model antijamming capability is strong, demodulation speed is fast, and performance is better than common single-frequency frequency-shift type command signal mode.
3. the interface arrangement of making a start adopts the special-purpose dual tone multi-frequency signal generator of communication to match with quartz oscillator, and the signal frequency of output is highly stable; The receiving end interface arrangement adopts the phase-locked loop of touch-tone signal integrated circuit and high stability that signal is carried out demodulation, and working stability is reliable.
4. this device can transmit three trip signals, at the interface arrangement of making a start, adopts electronic switch that the signal of output is switched, and makes the shift frequency speed of signal very fast.
5. supervisory signal has the single-frequency blocking function to the outlet of receiving end interface arrangement, has further improved the safety and the reliability of device.
Embodiment of the present utility model is illustrated in conjunction with the accompanying drawings.
Fig. 1 is the utility model and miscellaneous equipment connection diagram (Figure of abstract).
Fig. 2 is the utility model shape assumption diagram.
Fig. 3 is the utility model interface arrangement circuit block diagram of making a start.
Fig. 4 is the utility model interface arrangement circuit theory diagrams of making a start.
Fig. 5 is the utility model receiving end interface arrangement circuit block diagram.
Fig. 6 is the utility model receiving end interface arrangement circuit theory diagrams.
As shown in Figure 1, square frame (1) is the transmission interface device, port 2-3,4-5,6-7, is three trip signal signal input parts; 16-17 is an audio signal output end; j 1, j 2, j 3, be local relay protection unit trip signal relay contact, the V that joins with port one 5 is a power supply side, port one 8 is an earth terminal.Square frame (2), (3) are communication equipment, and (8) are voice-frequency cable, and (9) are transmission channel.Square frame (4) is the receiving end interface arrangement, J 1, J 2, J 3Be the exit relay contact; Port 2-3,4-5,6-7 are the output of three trip signal signals; 16-17 is an audio signal input end; K, the K and the K that join with port 8,10,12 are permitted the trip signal input for filling; 9,11,13 ports are earth point.Square frame (5), (6), (7) are distant place relay protection device or high-voltage switch gear.
As shown in Figure 2,1---circuit board, 2---shell, 3---standard plug, 4,5,6 is the trip signal indicator light, when when making a start interface arrangement, is input indicator; When being the receiving end interface arrangement, be output indicator.7---the reset switch of signal self-hold circuit, 8---alarm indicator, 9---power supply indicator.The interface arrangement of making a start is identical with receiving end interface arrangement contour structures.
As shown in Figure 3, the interface arrangement of making a start comprises that photoelectrical coupler ［ 4 ］, ［ 5 ］, ［ 6 ］, ［ 7 ］ are signal switching circuit, ［ 8 ］ be the input order signal indicating circuit, ［ 9 ］ are dual tone multi-frequency signal generator, and this signal generator is connected with big 18MHZ quartz crystal.［ 10 ］ be amplification/match circuit, ［ 11 ］ are the level monitoring circuit.The interface arrangement of making a start is connected with local relay protection device ［ 1 ］, ［ 2 ］, ［ 3 ］ and communication equipment ［ 12 ］.
As shown in Figure 4, optocoupler circuit is mainly by ic chip 10, IC 11, IC 12And D 1, D 2, D 3Constitute.Three photoelectrical couplers respectively with the signal switching circuit ic chip 1, IC 2And IC 3Join IC 3Include K 1, K 2, K 3And K 4Four electronic switches, this part circuit are responsible for the switching of trip signal and the priority of decision trip signal.Dual tone multi-frequency signal generator is by IC 4Form the IC of the interface arrangement of originally making a start with the 5.18MHZ quartz crystal 4Adopt integrated package MK5087, its inside is made up of crystal oscillator, row and column counter, sine-wave generator, D/A converter, frequency divider, adder etc., and the outside is connected to the quartz crystal of 5.18MHZ, can obtain 8 signal frequencies.f 1～f 8Scope between 1000HZ to 2400HZ.f 1～f 8Can four groups of signal: supervisory signal 1015HZ, 1760HZ composed as follows; Trip signal (1) 1116HZ, 1927HZ; Trip signal (2) 1240HZ, 2130HZ; Trip signal (3) 1353HZ, 2380HZ.Stabilized voltage power supply is by ic chip 5Constitute with electric capacity, voltage is stabilized in 5V.Amplification matching circuit is mainly by operational amplifier IC 6With transformer B 1Constitute, be used for signal is amplified, obtain required output level, and finish imbalance/balanced transformation, D 4, D 5, D 6Constitute output protection circuit, the damage that may cause device in order to the strong jamming that prevents to scurry into from audio output port.The level monitoring phone is by two operational amplifier IC 7-1And IC 7-2And diode D 7, D 8Form, when the ratio rated value of output level reduces by 3 decibels, send alarm signal automatically.Signal indicating circuit is by three d type flip flop IC 8-1, IC 8-2And IC 9And four light-emitting diode D 9, D 10, D 11, D 12
Constitute, be used for the trip signal signal of power supply and input is indicated.
As shown in Figure 5, the receiving end interface arrangement comprises coupling amplifying circuit ［ 2 ］, touch-tone signal receiving circuit ［ 3 ］, prison discharge signal receiving circuit ［ 4 ］ and ［ 5 ］, Digital Logical Circuits ［ 6 ］, signal indication/abnormality alarming circuit ［ 7 ］, AND circuit ［ 8 ］ ［ 9 ］ ［ 10 ］, exit relay ［ 11 ］ ［ 12 ］ ［ 13 ］.Coupling amplifying circuit ［ 2 ］ is connected with communication equipment ［ 1 ］, and exit relay ［ 11 ］ ［ 12 ］ ［ 13 ］ is connected with distant place adaptive polarizing memory voltage time constant ［ 14 ］ ［ 15 ］ ［ 16 ］ respectively.Be connected to respectively on the AND circuit ［ 8 ］ ［ 9 ］ ［ 10 ］ and fill trip signal input K perhaps 1, K 2And K 3
As shown in Figure 6, the coupling amplifying circuit is by audio frequency transformer B 1, operational amplifier IC 1And diode D 1, D 2, D 3Constitute with element such as resistance, in order to finishing the balance/imbalance conversion, and amplify to the received signal.D 1, D 2And D 3Be used for preventing the damage that the strong jamming of scurrying into from audio input port may cause device.Supervisory signal f 1And f 5Receiving circuit by ic chip 3And IC 4Part constitutes, and the integrated package model that embodiment provides is NE567, and it is the phase-locked loop tone signal demodulator circuit with high stability, when it receives the signal of a given frequency, and can output low level.IC 3To f 1Receive IC separately 4To f 5Receive separately, to realize f 1And f 5To the single-frequency blocking function of device outlet, the antijamming capability of intensifier.Ic chip 2Part is a stabilized voltage power supply.The touch-tone signal receiving circuit is important in ic chip 5Constitute with the 5.18MHZ quartz crystal.IC 5Can select multiple integrated package for use, as if being example with MT8870, functional units such as DTMF high and low frequency band pass filter, zero-crossing detector, frequency digital detector, code conversion and latch, crystal oscillator and control and monitoring logic are contained in its inside.When MT8870 receives by f 1And f 5During the supervisory signal formed, its four figures is according to output Q 4, Q 3, Q 2, Q 1Export 0001 code character; When it received trip signal 1,2 or signal 3, the output of its data was respectively 0101,1001 or 0000 code character.These data are delivered in the Digital Logical Circuits handle, just can revert to various trip signal signals.Reduce MT8870 external capacitor C 11Can improve the demodulation speed to signal, the demodulation time, the 40ms by standard reduced to below the 12ms, had satisfied the needs of device to the signal demodulation speed.Digital Logical Circuits is by ic chip 6, IC 7, IC 8, IC 10, IC 11, IC 12, IC 13Constitute with other element such as electric capacity, resistance, main effect is IC 3, IC 4And IC 5The signal that demodulates is comprehensively judged and is deciphered, and reverts to various trip signal signals.IC 6And IC 7Adopt the CD40109 integrated package, be used for an IC 5The low level signal (5V) of output promotes and is high level signal (13.5V), to improve the antijamming capability of signal.IC 8Adopting four---16 decoder CD4514 are used for to IC 5The signal of output is deciphered, and can export supervisory signal, trip signal 1, trip signal 2, trip signal 3 high level signals respectively.Ic chip 9Part is a stabilized voltage power supply.IC 10-1, IC 11-1And IC 11-2Constitute the supervisory signal exclusive circuit, locking IC 12-1, IC 12-2And IC 12-3Input.IC 10-2, IC 11-3And R 13, C 12Form the 100ms timing circuit Deng element, make behind supervisory signal disappearance 100ms IC 11-3Output low level makes the atretostomia that of device.IC 13-1, IC 13-2And IC 13-3Constitute AND circuit.R 16, R 17, R 18And C 13, C 14, C 15Constitute the 3ms delay circuit, in order to eliminate impulse disturbances.Signal indication/abnormality alarming circuit is by IC 14, IC 15And D 5, D 6, D 15, D 16, D 17Constitute Deng element.Wherein, D 5Be power supply indicator; D 15, D 16,
It is respectively the indicator light of output trip signal signal 1,2,3; D 6Be the abnormality alarming indicator light, when channel failure taking place make signal interruption or disturb abnormal conditions such as excessive, plant failure, this lantern festival is sent the alarm indication immediately.J in the circuit 1, J 2And J 3Be exit relay.

Claims (3)

1, a kind of dual-tone multifrequency remote tripping signal transmission interface device, comprise make a start interface arrangement and receiving end mouth device, two supporting interface arrangements are made up of shell, circuit board, standard plug, reset switch and various signal lamp respectively, and the circuit of the interface arrangement that it is characterized in that making a start comprises signal switching circuit, input order signal indicating circuit, dual tone multi-frequency signal generator, amplification matching circuit, level monitoring circuit; The receiving end interface arrangement comprises touch-tone signal receiving circuit, supervisory signal receiving circuit, Digital Logical Circuits, signal indication/abnormality alarming circuit, amplification matching circuit and exit relay.
2, dual-tone multifrequency remote tripping signal transmission interface device according to claim 1, the dual tone multi-frequency signal generator of interface arrangement of it is characterized in that making a start comprises inner by crystal oscillator, row and column counter, the lower edge wave producer, the D/A converter, frequency divider, the dual tone multi-frequency signal generator IC4(MK5087 that adder is formed) and quartz crystal, can obtain frequency range and comprise hex inverter IC1(CD4069) at the signal switching circuit of 8 signal frequencies (f1-f8) of 300Hz-2400Hz, 33 inputs and door IC2(CD4073) and four bidirectional switch IC3(CD4066), IC3 contains 4 electronic switch K1, K2, K3 and K4.
3, dual-tone multifrequency remote tripping signal transmission interface device according to claim 1, the touch-tone signal receiving circuit that it is characterized in that the receiving end interface arrangement comprises touch-tone signal receiver IC5(MT8870) and the quartz crystal formation, the external capacitor C 11 that improves the signal demodulation speed of this circuit, the receiving circuit of supervisory signal f1 and f5 comprises the phase-locked loop circuit IC3(NE567 that the f1 frequency is received separately) and IC4(NE567), the Digital Logical Circuits that the signal that IC5 demodulates carries out comprehensive distinguishing and decoding comprises four level translator IC6(CD40109) and IC7(CD40109), 4 lines-16 line decoder IC8(CD4514), hex inverter IC10(CD4069), 42 inputs and door IC11(CD4081) and IC12(CD4081), 33 inputs and door IC13(CD4073) and electric capacity, elements such as resistance.
CN 93202887 1993-01-28 1993-01-28 Diphonia multi-frequency distant trip signal transmission interface apparatus Expired - Fee Related CN2153171Y (en)

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Application Number Priority Date Filing Date Title
CN 93202887 CN2153171Y (en) 1993-01-28 1993-01-28 Diphonia multi-frequency distant trip signal transmission interface apparatus

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Application Number Priority Date Filing Date Title
CN 93202887 CN2153171Y (en) 1993-01-28 1993-01-28 Diphonia multi-frequency distant trip signal transmission interface apparatus

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CN2153171Y true CN2153171Y (en) 1994-01-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929235A (en) * 2010-09-29 2014-07-16 江苏省电力公司常州供电公司 Optical path switching interface mechanism used for fiber channel test of relay protection device
CN103929240A (en) * 2010-09-29 2014-07-16 江苏省电力公司常州供电公司 Work method of optical path switching interface mechanism of relay protection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929235A (en) * 2010-09-29 2014-07-16 江苏省电力公司常州供电公司 Optical path switching interface mechanism used for fiber channel test of relay protection device
CN103929240A (en) * 2010-09-29 2014-07-16 江苏省电力公司常州供电公司 Work method of optical path switching interface mechanism of relay protection device
CN103929235B (en) * 2010-09-29 2016-06-15 江苏省电力公司常州供电公司 A kind of optical path switching interface mechanism for fiber channel test of protective relaying device
CN103929240B (en) * 2010-09-29 2016-12-07 江苏省电力公司常州供电公司 A kind of method of work of the switching-over light path interface agency of protective relaying device

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