CN201107398Y - Low pressure platform zone load verification instrument transmitting device - Google Patents
Low pressure platform zone load verification instrument transmitting device Download PDFInfo
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- CN201107398Y CN201107398Y CNU2007201168857U CN200720116885U CN201107398Y CN 201107398 Y CN201107398 Y CN 201107398Y CN U2007201168857 U CNU2007201168857 U CN U2007201168857U CN 200720116885 U CN200720116885 U CN 200720116885U CN 201107398 Y CN201107398 Y CN 201107398Y
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Abstract
The utility model discloses a low-voltage transformer area load calibrater transmitter which includes terminals and secondary side A, B and C phases of a user transformer which are connected with the terminals; the ground wires of the secondary side A, B and C phases of the user transformer are mutually connected into an N phase and connected with the terminals, wherein, the secondary side A, B and C phases of the user transformer have the same structure; each phase includes a transformer unit, a power frequency voltage zero crossing detecting unit, a signal modulating unit, a control unit and a display unit; the transformer unit is connected with the power frequency voltage zero crossing detecting unit; the power frequency voltage zero crossing detecting unit is connected with the control unit; the control unit is respectively connected with the signal modulating unit and the display unit; the signal modulating unit is connected with the transformer unit. The low-voltage transformer area load calibrater transmitter has the advantages of high measuring precision, long transmission distance and applicability to complicated low-voltage distribution circuits of the city network, and can quickly, accurately, conveniently and directly determine the load of the transformer and the power phase of the initiating terminal and the terminal.
Description
(1) technical field
The utility model relates to a kind of collimation technique, is specifically related to a kind of transformer low voltage platform district's load verification instrument.
(2) background technology
City net low-voltage distribution wire ubiquity intersects and bridging phenomenon, such as comprising pole line, underground cable etc.In the daily servicing operation; the platform interval takes place and leads load condition in Shi Changhui; promptly owing to some on-the-spot reason; transformer first institute on-load is transferred to transformer second; by transformer second it is powered, this kind phenomenon easily causes the not clear operation drawback of the not cleer and peaceful underground cable trend of operating transformer institute on-load.Therefore need the low district's load of presenting a theatrical performance as the last item on a programme of prover to calibrate.
And only have a kind of transmission that high-frequency carrier signal carries out signal and " wire " of reception of adopting to be used for the low district's load verification of presenting a theatrical performance as the last item on a programme in the market, because detection signal is striden the transformer transmission, " harassing phenomenon " very easily takes place in the adjacent stations interval, and wrong phenomenon takes place to detect; Simultaneously, the network impedance time variation of low-voltage network, network decay property and interference noise are also very serious to the influence of transmission signals, and existing product to far away for load promptly with the frequent misalignment of detection or the failure of transformer lines distance power load far away, so need a kind of prover that can overcome above defective and carry out the district's load verification of low pressure platform on the market badly.
(3) summary of the invention
The purpose of this utility model is to provide a kind of measuring accuracy height, long transmission distance, be fit to the city nets complicated low-voltage distributing line, can be fast, accurately, convenient, intuitively determine transformer institute's on-load and the whole story two ends power phase low presenting a theatrical performance as the last item on a programme distinguish load verification instrument dispensing device.
The purpose of this utility model is achieved in that it comprises terminals and the user transformers secondary side A that is connected terminals, B, the C phase, user transformers secondary side A, B, the ground wire of C phase is connected to the N phase and connects terminals, user transformers secondary side A wherein, B, the C phase structure is identical, every transformer unit that comprises mutually, power-frequency voltage zero passage detection unit, the signal modulating unit, control module and display unit, transformer unit connects power-frequency voltage zero passage detection unit, power-frequency voltage zero passage detection unit connects control module, control module connects signal modulating unit and display unit respectively, and the signal modulating unit connects transformer unit.
The utility model also has some technical characterictics like this:
1, described transformer unit comprises transformer A1, diode D1-D4 and stabilized voltage supply U1, diode D1-D4 forms full-wave rectifying circuit and connects transformer A1 and stabilized voltage supply U1 respectively, stabilized voltage supply U1 connects other unit respectively, and the terminals of transformer A1 connect electrical network, signal modulating unit and power-frequency voltage zero passage detection unit;
2, described power-frequency voltage zero passage detection unit comprises low-pass filter U2, transport and placing device U3, triode T1, resistance R 1-R2, capacitor C 1 and diode D5-D6, resistance R 1, capacitor C 1 connect low-pass filter U2 respectively, low-pass filter U2 connects transport and placing device U3, diode D5, D6 be connected in parallel low-pass filter U2 and transport and placing device U3, the output terminal of transport and placing device U3 connects triode T1 base stage, the input end IN1 of low-pass filter U2 connects transformer A1, the collector of triode T1 connects resistance R 2 and connects transformer unit, and the output terminals A of triode T1 connects control module;
3, described signal modulating unit comprises inductance L 1, controllable silicon U5, resistance R 3-R5, capacitor C 2, photoisolator U4 and triode T2, resistance R 3, capacitor C 2 and controllable silicon U5 parallel connection, the one end OUT1 and the resistance R 3 of inductance L 1, capacitor C 2, one end OUT2 of controllable silicon U5 parallel connection connects two terminals of transformer A1 respectively, resistance R 3, capacitor C 2, the other end of controllable silicon U5 parallel connection is connected with the other end of inductance L 1, connect resistance R 4 simultaneously, resistance R 4 is connected photoisolator U4 with controllable silicon U5, photoisolator U4 connects resistance R 5 and triode T2, resistance R 5 connects direct supply, and the input end B of triode T2 connects control module;
4, described display unit is light emitting diode or LCD module.
The terminals of the utility model dispensing device connect user transformers secondary side A, B, C, N phase respectively, and stabilized voltage supply U1 provides power supply.Behind the power connection, A, B, C three-phase send power frequency zero passage modulated voltage signal simultaneously, comprise each phase phase information, after the receiving trap that user side connects is received respective phase information, show the phase information of receiving trap terminals.The utility model control module is made up of single-chip microcomputer, be applicable to the calibration of the checking of transformer institute on-load, buried feed cable trend and institute's on-load, also can be used for simultaneously cable installation, set up, overhaul, belong to and differentiate line of electric force circuit two ends at whole story power phase whether consistent detection, indicating device.The power-frequency voltage zero passage detection unit of the utility model design and control module can effectively overcome the interval influence that easily takes place network impedance time variation, network decay property and the interference noise of " harassing phenomenon " and low-voltage network to transmission signals of adjacent stations, to the accuracy of detection height for load far away, have long transmission distance, be fit to the advantage that complicated low-voltage distributing line is netted in the city, can be fast, convenient, intuitively determine transformer institute's on-load and the whole story two ends power phase, be the low district's load verification instrument of presenting a theatrical performance as the last item on a programme of a new generation.
(4) description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the circuit theory diagrams of transformer unit;
Fig. 3 is the circuit theory diagrams of power-frequency voltage zero passage detection unit;
Fig. 4 is the circuit theory diagrams of signal modulating unit;
Fig. 5 is the circuit theory diagrams of control module;
Fig. 6 is circuit theory diagrams of the present utility model.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
In conjunction with Fig. 1, present embodiment comprises terminals and the user transformers secondary side A that is connected terminals, B, the C phase, user transformers secondary side A, B, the ground wire of C phase is connected to the N phase and connects terminals, user transformers secondary side A wherein, B, the C phase structure is identical, every transformer unit that comprises mutually, power-frequency voltage zero passage detection unit, the signal modulating unit, control module and display unit, transformer unit connects power-frequency voltage zero passage detection unit, power-frequency voltage zero passage detection unit connects control module, control module connects signal modulating unit and display unit respectively, and the signal modulating unit connects transformer unit.
In conjunction with Fig. 6, be example mutually with A, the course of work of present embodiment dispensing device is described:
In conjunction with Fig. 2, transformer unit is mainly by transformer A1, diode D1～D4, and stabilized voltage supply U1 forms.Diode D1～D4 forms full-wave rectifying circuit and stabilized voltage supply U1 provides power supply for whole operating circuit.The purpose of transformer unit is: for whole operating circuit provides power supply, for power-frequency voltage zero passage detection unit provides power frequency component, the output signal of signal modulating unit is coupled to electrical network.
In conjunction with Fig. 3, power-frequency voltage zero passage detection unit is mainly by low-pass filter U2 and transport and placing device U3, and triode T1 forms.R1, C1 are provided with the centre frequency of wave filter U2 and by frequency.Transport and placing device U3 is connected into the comparer form, adopts the method for in-phase end ground connection to carry out the power-frequency voltage zero passage detection, and diode D5, D6 play the amplitude limit effect.Triode T1 works the comparator circuit output level effect of regulating.The input end IN1 of power frequency component zero passage detection unit connects terminal of transformer A1, and output terminals A output power frequency synchronizing pulse is connected to the single-chip microcomputer external interrupt.Power frequency component zero passage detection unit purpose is the accuracy that guarantees synchronizing signal, the reliable location when reaching the modulation of power frequency zero passage voltage signal.
In conjunction with Fig. 4, the signal modulating unit mainly is made up of inductance L 1, controllable silicon U5, resistance R 3-R5, capacitor C 2, photoisolator U4 and triode T2.Resistance R 3, capacitor C 2 and controllable silicon U5 parallel connection, one end OUT2 of one end OUT1 of inductance L 1 and resistance R 3, capacitor C 2, controllable silicon U5 parallel connection connects two terminals of transformer A1 respectively, the other end of resistance R 3, capacitor C 2, controllable silicon U5 parallel connection is connected with the other end of inductance L 1, connect resistance R 4 simultaneously, resistance R 4 is connected photoisolator U4 with controllable silicon U5, photoisolator U4 connects resistance R 5 and triode T2, and resistance R 5 connects direct supply, and the input end B of triode T2 connects control module.Input end B connects the I/O delivery outlet of single-chip microcomputer.Under the control of single-chip microcomputer; controllable silicon U5 is when power-frequency voltage near zero-crossing point triggering and conducting, and inductance L 1 will produce an induced electromotive force, is modulated to by modulation transformer A1 and forms a power frequency zero passage modulated voltage signal on the electrical network; resistance R 3, capacitor C 2 play the amplitude limit effect, the protection controllable silicon.The purpose of signal modulating unit is: the power frequency zero passage modulated voltage signal that comprises phase information in the control modulated of single-chip microcomputer; its advantage is the program control pulse conducting triode T2 of elder generation that single-chip microcomputer sends; control the conducting of controllable silicon U5 again by photoisolator U4; effectively suppressed the false triggering of controllable silicon U5; the two ends crest voltage is no more than its ratings during the 2 protection controllable silicon U5 conductings of resistance R 3, capacitor C, prolongs equipment service time.
In conjunction with Fig. 5, the present embodiment control module adopts Single-chip Controlling, and the display unit device adopts the LCD module, all adopts prior art to realize, does not just describe in detail here.
Claims (9)
1, a kind of low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme, it comprises terminals and the user transformers secondary side A that is connected terminals, B, the C phase, user transformers secondary side A, B, the ground wire of C phase is connected to the N phase and connects terminals, it is characterized in that user transformers secondary side A, B, the C phase structure is identical, every transformer unit that comprises mutually, power-frequency voltage zero passage detection unit, the signal modulating unit, control module and display unit, transformer unit connects power-frequency voltage zero passage detection unit, power-frequency voltage zero passage detection unit connects control module, control module connects signal modulating unit and display unit respectively, and the signal modulating unit connects transformer unit.
2, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 1, it is characterized in that described transformer unit comprises transformer A1, diode D1-D4 and stabilized voltage supply U1, diode D1-D4 forms full-wave rectifying circuit and connects transformer A1 and stabilized voltage supply U1 respectively, stabilized voltage supply U1 connects other unit respectively, and the terminals of transformer A1 connect electrical network, signal modulating unit and power-frequency voltage zero passage detection unit.
3, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 1 and 2, it is characterized in that described power-frequency voltage zero passage detection unit comprises low-pass filter U2, transport and placing device U3, triode T1, resistance R 1-R2, capacitor C 1 and diode D5-D6, resistance R 1, capacitor C 1 connects low-pass filter U2 respectively, low-pass filter U2 connects transport and placing device U3, diode D5, D6 be connected in parallel low-pass filter U2 and transport and placing device U3, the output terminal of transport and placing device U3 connects triode T1 base stage, the input end IN1 of low-pass filter U2 connects transformer A1, the collector of triode T1 connects resistance R 2 and connects transformer unit, and the output terminals A of triode T1 connects control module.
4, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 1 and 2, it is characterized in that described signal modulating unit comprises inductance L 1, controllable silicon U5, resistance R 3-R5, capacitor C 2, photoisolator U4 and triode T2, resistance R 3, capacitor C 2 and controllable silicon U5 parallel connection, the one end OUT1 and the resistance R 3 of inductance L 1, capacitor C 2, one end OUT2 of controllable silicon U5 parallel connection connects two terminals of transformer A1 respectively, resistance R 3, capacitor C 2, the other end of controllable silicon U5 parallel connection is connected with the other end of inductance L 1, connect resistance R 4 simultaneously, resistance R 4 is connected photoisolator U4 with controllable silicon U5, photoisolator U4 connects resistance R 5 and triode T2, resistance R 5 connects direct supply, and the input end B of triode T2 connects control module.
5, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 3, it is characterized in that described signal modulating unit comprises inductance L 1, controllable silicon U5, resistance R 3-R5, capacitor C 2, photoisolator U4 and triode T2, resistance R 3, capacitor C 2 and controllable silicon U5 parallel connection, the one end OUT1 and the resistance R 3 of inductance L 1, capacitor C 2, one end OUT2 of controllable silicon U5 parallel connection connects two terminals of transformer A1 respectively, resistance R 3, capacitor C 2, the other end of controllable silicon U5 parallel connection is connected with the other end of inductance L 1, connect resistance R 4 simultaneously, resistance R 4 is connected photoisolator U4 with controllable silicon U5, photoisolator U4 connects resistance R 5 and triode T2, resistance R 5 connects direct supply, and the input end B of triode T2 connects control module.
6, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 1 and 2 is characterized in that described display unit is light emitting diode or LCD module.
7, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 3 is characterized in that described display unit is light emitting diode or LCD module.
8, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 4 is characterized in that described display unit is light emitting diode or LCD module.
9, low district's load verification instrument dispensing device of presenting a theatrical performance as the last item on a programme according to claim 5 is characterized in that described display unit is light emitting diode or LCD module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201168857U CN201107398Y (en) | 2007-08-31 | 2007-08-31 | Low pressure platform zone load verification instrument transmitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201168857U CN201107398Y (en) | 2007-08-31 | 2007-08-31 | Low pressure platform zone load verification instrument transmitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201107398Y true CN201107398Y (en) | 2008-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201168857U Expired - Fee Related CN201107398Y (en) | 2007-08-31 | 2007-08-31 | Low pressure platform zone load verification instrument transmitting device |
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|---|---|
| CN (1) | CN201107398Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698643A (en) * | 2013-12-25 | 2014-04-02 | 浙江图维电力科技有限公司 | Low-voltage power distribution area identification method and power distribution area instrument |
| CN108896821A (en) * | 2018-05-09 | 2018-11-27 | 国网黑龙江省电力有限公司哈尔滨供电公司 | A kind of low-voltage platform area load identification device |
-
2007
- 2007-08-31 CN CNU2007201168857U patent/CN201107398Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698643A (en) * | 2013-12-25 | 2014-04-02 | 浙江图维电力科技有限公司 | Low-voltage power distribution area identification method and power distribution area instrument |
| CN108896821A (en) * | 2018-05-09 | 2018-11-27 | 国网黑龙江省电力有限公司哈尔滨供电公司 | A kind of low-voltage platform area load identification device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 Termination date: 20100831 |