CN203849356U - Voltage transformer secondary wire connection inspection device - Google Patents
Voltage transformer secondary wire connection inspection device Download PDFInfo
- Publication number
- CN203849356U CN203849356U CN201420261585.8U CN201420261585U CN203849356U CN 203849356 U CN203849356 U CN 203849356U CN 201420261585 U CN201420261585 U CN 201420261585U CN 203849356 U CN203849356 U CN 203849356U
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Abstract
The utility model provides a voltage transformer secondary wire connection inspection device. A signal source module is used to apply a voltage signal for inspection onto the secondary winding of a voltage transformer according to the control instruction of a processing unit. A primary winding voltage is generated on the primary winding of the inspected voltage transformer. The primary winding voltage is converted into the level of the voltage signal for inspection through a mutual inductor module. The primary winding voltage of the inspected voltage transformer, the voltage signal for inspection and the residual winding voltage of the inspected voltage transformer are transmitted to a processing unit. The processing unit is used to perform analysis and comparison on the voltages and then display the inspection result on a display circuit. The utility model provides a voltage transformer secondary wire connection inspection method and device having advantages of simple structure, high line inspection efficiency and high accuracy, so the voltage transformer and corresponding loads can be well protected.
Description
Technical field
The utility model belongs to technical field of electricity, is specifically related to the wiring error inspection of the voltage transformer (VT) in voltage transformer (VT).
Background technology
Voltage transformer (VT), especially high voltage potential transformer be as the visual plant using in generating plant, transformer station, customer substation, and the correctness of its wiring is for the safety of power supply and stablely play important meaning.
The correctness of the secondary connection of the voltage transformer (VT) in voltage transformer cabinet, has been directly connected to the whether safety of security of operation of the even whole circuit of load.If the secondary connection mistake of voltage transformer (VT), can cause that electric energy metrical is inaccurate, protective relaying device malfunction or tripping, even can burn high voltage potential transformer or cause power failure.
Voltage transformer cabinet after the new installation of transformer station or maintenance all must carry out the inspection of the secondary connection of voltage transformer (VT).
Conventionally adopt at present the mode of the artificial line inspection to check that whether the secondary connection of voltage transformer (VT) is correct, it is lower which line inspection efficiency and mis-wired are found rate, and the mis-wired of not finding affects the safe operation of electrical network or causes the phenomenon that voltage transformer (VT) burns to happen occasionally.
Summary of the invention
The utility model aims to provide a kind of Secondary Connections of PTs testing fixture, can realize automatically the whether correct detection of Secondary Connections of PTs, has greatly improved line inspection efficiency and accuracy.
For solving the problems of the technologies described above, the utility model discloses and comprise the signal source module that inspection voltage signal is provided, the mutual inductor module of voltage of transformation level, also comprises display circuit, key circuit, remote control module, processing unit and multichannel AC voltage measurement module;
The voltage signal output end of described signal source module connects the voltage signal input end of remote control module, the bus interface of remote control module connects the communication interface of processing unit, the voltage signal output end of remote control module connects the Secondary Winding of tested voltage transformer (VT), a winding of tested voltage transformer (VT) connects the voltage signal input end of multichannel AC voltage measurement module by mutual inductor module, the voltage signal input end of multichannel AC voltage measurement module is the residue winding of the voltage signal output end of connecting signal source module and the Secondary Winding of tested voltage transformer (VT) also, the voltage signal output end of multichannel AC voltage measurement module connects the communication interface of processing unit, the push button signalling interface of described processing unit connects the output terminal of key circuit, the display interface of processing unit connects the signal input part of display circuit,
The operation that is also included as each circuit and module provides the DC circuit of direct supply, and provides the AC power circuit of ac voltage signal for the operation of device.
Further, described signal source module comprises signal source voltage mutual inductor, the primary winding of described signal source voltage mutual inductor connects civil power by power switch, secondary coil connects the voltage signal input end of remote control module, and the voltage signal input end of multichannel AC voltage measurement module.
Further, described remote control module comprises remote I/O module (Input/Outpu Remote control, technical grade remote collection and control module), the bus interface of described remote I/O module connects the communication interface of processing unit, processing unit sends steering order by communication interface to remote I/O module, the secondary coil of the voltage signal input end connecting signal source voltage transformer (VT) of remote I/O module, the voltage signal output end of remote I/O module connects the Secondary Winding of tested voltage transformer (VT).
Further, described mutual inductor module comprises three identical winding voltage mutual inductors, the primary winding of a described winding voltage mutual inductor connects a winding of tested voltage transformer (VT), and the secondary coil of a winding voltage mutual inductor connects the signal input part of multichannel AC voltage measurement module.
Further, described multichannel AC voltage measurement module comprises plurality of voltages analog acquisition element, be used for gathering ac voltage signal, the secondary coil of several voltage signal input ends difference connecting signal source voltage transformer (VT) of described plurality of voltages analogue collection module, the residual voltage winding of Secondary Winding and the secondary coil of three winding voltage mutual inductors of tested voltage transformer (VT), voltage signal output end connects the communication interface of processing unit by bus, processing unit relatively sends low and high level by analysis.
Further, the voltage signal input end of described plurality of voltages analogue collection module connects the residual voltage winding of the Secondary Winding of tested voltage transformer (VT) by immunity module, and described immunity module is a large bulk capacitance.
Described display circuit comprises ten identical light emitting diodes, and light emitting diode one end connects the display interface of processing unit, and one end connects DC circuit.
Further, described key circuit comprises three identical buttons, and button one end connects the push button signalling input end of processing unit, and one end connects the sensor electrical source interface of processing unit.
Described DC circuit comprises direct-current switch power supply, and described direct-current switch power supply connects civil power by power switch.
According to technical scheme disclosed in the utility model, can realize automatically the whether correct detection of Secondary Connections of PTs, greatly improve line inspection efficiency and accuracy, demonstrate intuitively check result by light emitting diode simultaneously.
Brief description of the drawings
Fig. 1 is the theory diagram of Secondary Connections of PTs testing fixture in the utility model embodiment;
Fig. 2 is the circuit theory diagrams of signal source module in the utility model embodiment, remote control module, measurement module and mutual inductor module;
Fig. 3 is the circuit theory diagrams of key circuit and display circuit in the utility model embodiment;
Fig. 4 is the circuit theory diagrams of DC circuit and AC power circuit in the utility model embodiment.
Embodiment
The utility model by applying inspection voltage signal in the Secondary Winding of tested voltage transformer (VT), detect again on a winding of tested voltage transformer (VT) and whether produce corresponding voltage signal, thereby whether the secondary connection that judges voltage transformer (VT) is correct, the type if false judgment makes mistake, and wrong position.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present utility model instead of whole embodiment.
The utility model embodiment provides a kind of Secondary Connections of PTs testing fixture, as shown in Figure 1, comprising: signal source module, for obtaining inspection voltage signal; Remote control module, remote control module, mutual inductor module, processing unit, display circuit, key circuit and multichannel AC voltage measurement module;
Described signal source module connects remote control module and multichannel AC voltage measurement module, remote control module connects the Secondary Winding of processing unit and tested voltage transformer (VT), a winding of tested voltage transformer (VT) connects multichannel AC voltage measurement module by mutual inductor module, multichannel AC voltage measurement module connects processing unit, and processing unit connects respectively key circuit and display circuit.
The operation that is also included as each circuit and module for the normal operation of assurance device provides the DC circuit of direct supply, and provides the AC power circuit of ac voltage signal for the operation of device.
Further, wherein, as shown in Figures 2 and 3, described signal source module provides inspection voltage signal for secondary connection inspection, comprise signal source voltage mutual inductor TV, the primary winding connectivity port JL1 of described signal source voltage mutual inductor TV, one end of JL2, secondary coil connects the voltage signal input end of remote control module and multichannel AC voltage measurement module, the other end of port JL1, JL2 connects AC power circuit, is the voltage signal of 1V left and right by signal source voltage mutual inductor TV by the voltage transition of AC power circuit.
The secondary connection inspection that described remote control module provides signal source module is transported to the Secondary Winding of test voltage mutual inductor with voltage signal, comprise remote I/O module CON, the secondary coil of voltage signal input end (pin is J2com) the connecting signal source voltage transformer (VT) TV of described remote I/O module CON, (pin is respectively D+ to the bus interface of remote I/O module CON, D-) connecting Programmable Logic Controller PLC(model by serial port is S7-224) communication interface (port is respectively 3, 8), (pin is respectively J0K to the voltage signal output end of remote I/O module CON, J1K, J2K) the connection terminal a of the Secondary Winding of connecting test voltage transformer (VT), b, c, (pin is respectively VCC to the power input of remote I/O module CON, GND) respectively by port ZL+, ZL-connects DC circuit.The remote transmission of utilizing described remote I/O module CON to carry out data is ripe prior art, and remote I/O module CON is commercial product.
Described mutual inductor module changes the voltage signal on a winding of tested voltage transformer (VT) into the level of the output voltage signal of signal source module, thereby be convenient to analyze relatively, comprise three identical winding voltage mutual inductors, be respectively winding voltage mutual inductor TVa the first one times, the second winding voltage mutual inductor TVb, a the three winding voltage mutual inductor TVc, the primary winding of described three winding voltage mutual inductors passes through respectively the connection terminal A of a winding of tested voltage transformer (VT), B, C connects a winding of tested voltage transformer (VT), secondary coil connects respectively the voltage signal input end of multichannel AC voltage measurement module.
Described multichannel AC voltage measurement module gathers voltage signal, transmission, comprise plurality of voltages analogue collection module M, first of described plurality of voltages analogue collection module M, two, (pin is respectively U8+ to three voltage signal input ends, U7+, U6+) connect respectively winding voltage mutual inductor TVa the first one times, the second winding voltage mutual inductor TVb, the positive output end of the secondary coil of a three winding voltage mutual inductor TVc, the negative output terminal of secondary coil connects the negative voltage signal input end (pin U6-) of plurality of voltages analogue collection module M, the 4th voltage signal input end (pin is U11+) of plurality of voltages analogue collection module M connects the connection terminal l of the Secondary Winding of tested voltage transformer (VT) by immunity module, thereby the voltage of residual voltage winding is input to plurality of voltages analogue collection module M, the secondary coil of the 5th voltage signal input end (pin is U0+) the connecting signal source voltage transformer (VT) TV of plurality of voltages analogue collection module M, thereby secondary connection inspection is input to plurality of voltages analogue collection module M with voltage signal, (pin is respectively D+ to the voltage signal output end of plurality of voltages analogue collection module M, D-) connecting Programmable Logic Controller PLC(model by serial port is S7-224) communication interface (port is respectively 3, 8), (pin is respectively VCC to the power input of plurality of voltages analogue collection module M, GND) respectively by port ZL+, ZL-connects DC circuit.Utilize described plurality of voltages analogue collection module M to carry out the collection of analog quantity voltage signal and be transmitted as ripe prior art, plurality of voltages analogue collection module M is commercial product.
Described immunity module, for the power frequency interference signals on filtering residue winding, comprises large bulk capacitance CAP, and described large bulk capacitance one end is connected with the residual voltage winding connection terminal l of the Secondary Winding of tested voltage transformer (VT), one end ground connection.
Described Programmable Logic Controller PLC is according to the voltage signal receiving, send corresponding low and high level and show check result, comparison procedure in Programmable Logic Controller PLC is: (port is respectively 3 to the communication interface of Programmable Logic Controller PLC, 8) remote I/O module CON is sent to steering order, make the corresponding voltage signal output end conducting of remote I/O module CON, thereby when a of the Secondary Winding to tested voltage transformer (VT), b, c add corresponding voltage signal on mutually successively:
1, the voltage signal that the multichannel AC voltage measurement module that Programmable Logic Controller also receives is successively carried, wiring is correct, and the respective pins of Programmable Logic Controller PLC is sent high level, and the light emitting diode joining is bright;
2, wherein have the voltage signal on a winding of a phase not to be transported to Programmable Logic Controller, judge corresponding phase wrong, type of error is phase shortage, and the respective pins of Programmable Logic Controller PLC is sent high level, and the light emitting diode joining is bright;
3, in the time giving in the corresponding addition of Secondary Winding voltage signal, when Programmable Logic Controller receives the voltage signal on an other corresponding winding, judge corresponding phase wrong, type of error is phase sequence wrong, the respective pins of Programmable Logic Controller PLC is sent high level, and the light emitting diode joining is bright; ;
4, the corresponding voltage signal that Programmable Logic Controller receives is negative value, judges corresponding phase wrong, and type of error is reverse polarity connection, and the respective pins of Programmable Logic Controller PLC is sent high level, and the light emitting diode joining is bright;
5, while being added voltage signal to one of Secondary Winding, when Programmable Logic Controller receives a three-phase voltage signal on winding, judge corresponding phase wrong, type of error is open-delta wrong, the respective pins of Programmable Logic Controller PLC is sent high level, and the light emitting diode joining is bright.
Programmable Logic Controller compares to the received signal, and to send low and high level according to comparative result be ripe prior art.
The input terminal common port (interface is respectively M, 2M, 1M) of Programmable Logic Controller PLC is connected, and output common port (interface is respectively 1L, 2L, 3L) connects the negative pole of DC circuit.
Described key circuit is for sending action command to Programmable Logic Controller PLC, start button S1, the S2 that stops key, selection key S3, described beginning button S1, the push button signalling input end (interface is respectively l1.2, l0.2, l0.5) of stop key S2 and selection key S3 one end connection Programmable Logic Controller PLC, the other end all connects the sensor voltage output terminal (interface is L+) of Programmable Logic Controller PLC.
Described display circuit is for showing check result, comprise ten identical light emitting diodes, taking the first light emitting diode L1 as example, first light emitting diode L1 one end connects the display output terminal (interface is Q1.1) of Programmable Logic Controller PLC, and the other end connects DC circuit by port ZL+.
Described AC power circuit, for the operation of device provides ac voltage signal, comprises power switch S, and described power switch S connects civil power by socket P.
As shown in Figure 4, described DC circuit provides direct supply for the operation of each circuit and module, comprise first, second, third direct-current switch power supply G1, G2, G3, the ac input end (pin is respectively N, L, E) of first, second, third direct-current switch power supply G1, G2, G3 all connects power switch S, and the DC output end (pin is respectively V+, V-) of the first DC power supply switch G1 connects 110V direct current connection terminal; The DC output end (pin is respectively V+, V-) of the second DC power supply switch G2 connects 220V direct current connection terminal; DC output end (pin is respectively V+, V-) connectivity port ZL+, the ZL-of the 3rd DC power supply switch G3, thereby first, second direct-current switch power supply G1, G2 provide the direct current operative power source of 110V and 220V for tested voltage transformer (VT), the 3rd direct-current switch power supply G3 provides direct supply for the operation of each circuit and module.
The utility model by applying inspection voltage signal in the Secondary Winding of tested voltage transformer (VT); and collection checks a winding voltage with voltage signal and tested voltage transformer (VT); thereby whether the secondary connection that judges voltage transformer (VT) is correct; it is simple in structure, line inspection efficiency is high, accuracy rate is high, can protect well voltage transformer (VT) and corresponding load.
Claims (9)
1. a Secondary Connections of PTs testing fixture, it is characterized in that: comprise the signal source module checking with voltage signal is provided, the mutual inductor module of voltage of transformation level, also comprises display circuit, key circuit, remote control module, processing unit and multichannel AC voltage measurement module;
The voltage signal output end of described signal source module connects the voltage signal input end of remote control module, the bus interface of remote control module connects the communication interface of processing unit, the voltage signal output end of remote control module connects the Secondary Winding of tested voltage transformer (VT), a winding of tested voltage transformer (VT) connects the voltage signal input end of multichannel AC voltage measurement module by mutual inductor module, the voltage signal input end of multichannel AC voltage measurement module is the residue winding of the voltage signal output end of connecting signal source module and the Secondary Winding of tested voltage transformer (VT) also, the voltage signal output end of multichannel AC voltage measurement module connects the communication interface of processing unit, the push button signalling interface of described processing unit connects the output terminal of key circuit, the display interface of processing unit connects the signal input part of display circuit,
The operation that is also included as each circuit and module provides the DC circuit of direct supply, and provides the AC power circuit of ac voltage signal for the operation of device.
2. Secondary Connections of PTs testing fixture as claimed in claim 1, it is characterized in that: described signal source module comprises signal source voltage mutual inductor, the primary winding of described signal source voltage mutual inductor connects civil power by power switch, secondary coil connects the voltage signal input end of remote control module, and the voltage signal input end of multichannel AC voltage measurement module.
3. Secondary Connections of PTs testing fixture as claimed in claim 2, it is characterized in that: described remote control module comprises remote I/O module, the bus interface of described remote I/O module connects the communication interface of processing unit, processing unit sends steering order by communication interface to remote I/O module, the secondary coil of the voltage signal input end connecting signal source voltage transformer (VT) of remote I/O module, the voltage signal output end of remote I/O module connects the Secondary Winding of tested voltage transformer (VT).
4. Secondary Connections of PTs testing fixture as claimed in claim 3, it is characterized in that: described mutual inductor module comprises three identical winding voltage mutual inductors, the primary winding of a described winding voltage mutual inductor connects a winding of tested voltage transformer (VT), and the secondary coil of a winding voltage mutual inductor connects the signal input part of multichannel AC voltage measurement module.
5. Secondary Connections of PTs testing fixture as claimed in claim 4, it is characterized in that: described multichannel AC voltage measurement module comprises plurality of voltages analog acquisition element, be used for gathering ac voltage signal, several voltage signal input ends of described plurality of voltages analogue collection module secondary coil of connecting signal source voltage transformer (VT) respectively, the secondary coil of the residual voltage winding of the Secondary Winding of tested voltage transformer (VT) and three winding voltage mutual inductors, voltage signal output end connects the communication interface of processing unit by bus, processing unit relatively sends low and high level by analysis.
6. Secondary Connections of PTs testing fixture as claimed in claim 5, it is characterized in that: the voltage signal input end of described plurality of voltages analogue collection module connects the residual voltage winding of the Secondary Winding of tested voltage transformer (VT) by immunity module, described immunity module is a large bulk capacitance.
7. Secondary Connections of PTs testing fixture as claimed in claim 6, is characterized in that: described display circuit comprises ten identical light emitting diodes, and light emitting diode one end connects the display interface of processing unit, and one end connects DC circuit.
8. Secondary Connections of PTs testing fixture as claimed in claim 7, it is characterized in that: described key circuit comprises three identical buttons, button one end connects the push button signalling input end of processing unit, and one end connects the sensor electrical source interface of processing unit.
9. Secondary Connections of PTs testing fixture as claimed in claim 8, is characterized in that: described DC circuit comprises direct-current switch power supply, described direct-current switch power supply connects civil power by power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261585.8U CN203849356U (en) | 2014-05-21 | 2014-05-21 | Voltage transformer secondary wire connection inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261585.8U CN203849356U (en) | 2014-05-21 | 2014-05-21 | Voltage transformer secondary wire connection inspection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849356U true CN203849356U (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420261585.8U Withdrawn - After Issue CN203849356U (en) | 2014-05-21 | 2014-05-21 | Voltage transformer secondary wire connection inspection device |
Country Status (1)
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|---|---|
| CN (1) | CN203849356U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954883A (en) * | 2014-05-21 | 2014-07-30 | 中国化学工程第十一建设有限公司 | Voltage transformer secondary connection inspecting method and device |
| CN106908687A (en) * | 2016-12-28 | 2017-06-30 | 国网浙江省电力公司台州供电公司 | Secondary loop of mutual inductor detection means |
| CN114252674A (en) * | 2021-12-15 | 2022-03-29 | 中国化学工程第十一建设有限公司 | Secondary wiring detection device and method |
-
2014
- 2014-05-21 CN CN201420261585.8U patent/CN203849356U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954883A (en) * | 2014-05-21 | 2014-07-30 | 中国化学工程第十一建设有限公司 | Voltage transformer secondary connection inspecting method and device |
| CN106908687A (en) * | 2016-12-28 | 2017-06-30 | 国网浙江省电力公司台州供电公司 | Secondary loop of mutual inductor detection means |
| CN114252674A (en) * | 2021-12-15 | 2022-03-29 | 中国化学工程第十一建设有限公司 | Secondary wiring detection device and method |
| CN114252674B (en) * | 2021-12-15 | 2023-09-22 | 中国化学工程第十一建设有限公司 | Secondary wiring detection device and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140924 Effective date of abandoning: 20160629 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |