CN213423350U - On-line detection device for lightning arrester of GIS (gas insulated switchgear) equipment of combined electrical apparatus - Google Patents
On-line detection device for lightning arrester of GIS (gas insulated switchgear) equipment of combined electrical apparatus Download PDFInfo
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- CN213423350U CN213423350U CN202022057134.0U CN202022057134U CN213423350U CN 213423350 U CN213423350 U CN 213423350U CN 202022057134 U CN202022057134 U CN 202022057134U CN 213423350 U CN213423350 U CN 213423350U
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Abstract
The utility model discloses an on-line measuring device to combined electrical apparatus GIS equipment arrester, include: the device comprises a first CPU module, a voltage detection module, a current measurement module, a first power module and a first 485 communication module, wherein the first CPU module is connected with the voltage detection module, signals of the current measurement module and the first 485 communication module, and the first power module is used for supplying power to the first CPU module; the voltage detection module is used for sensing and detecting a voltage signal and transmitting the voltage signal to the first CPU module, the current measurement module is used for detecting a current signal and transmitting the current signal to the first CPU module, and the first CPU module is used for sampling and processing the voltage signal and the current signal. The utility model discloses can be under the uninterrupted power supply, not dismantle the electric quantity data (total current and line voltage) of quantitative determination arrester under the arrester state, have and never influence the system operation, advantages such as operation safety, measurement accuracy height, removal flexibility, wiring are simple, investment economy.
Description
Technical Field
The utility model belongs to arrester monitoring field especially relates to an on-line measuring device to combined electrical apparatus GIS equipment arrester.
Background
A27.5 kV device of a domestic high-speed railway generally adopts a combined electrical cabinet (GIS for short) form, and the GIS cabinet is provided with a plug-in arrester which mainly plays a role in suppressing system overvoltage, protecting a bus and switching equipment. The zinc oxide valve plate of the lightning arrester is affected by system voltage, moisture, overheating and the like to be degraded, and the main performance is that the resistive current is increased. The continuous deterioration of valve block can cause the arrester to damage, explodes when serious, leads to damage such as GIS cabinet gas tank, sleeve pipe to withdraw from and transport.
Industry maintenance rule regulation should carry out insulation resistance to the arrester before every year thunderstorm season, reveal current detection, nevertheless receive GIS cabinet structure and arrester mounting means, the implementation of demolishd back detection scheme has been restricted, and present arrester on-line monitoring equipment need install in the factory when GIS high-voltage board product is stereotyped, there is not ripe scheme to the detection of past equipment, consequently present domestic existing high-speed railway circuit all does not implement to GIS cabinet plug arrester cycle detection work, there is very big potential safety hazard in equipment long-term overhaul.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides an on-line measuring device to combined electrical apparatus GIS equipment arrester can be under the uninterrupted power supply, not dismantle the arrester state quantitative detection arrester electric quantity data (total current and line voltage), has and never influence the system operation, advantages such as operation safety, measurement accuracy height, removal flexibility, wiring are simple, investment economy.
In order to achieve the above object, the utility model adopts the following technical scheme:
an on-line measuring device to combined electrical apparatus GIS equipment arrester includes: the device comprises a first CPU module, a voltage detection module, a current measurement module, a first power module and a first 485 communication module, wherein the first CPU module is connected with the voltage detection module, signals of the current measurement module and the first 485 communication module, and the first power module is used for supplying power to the first CPU module; the voltage detection module is used for sensing and detecting a voltage signal and transmitting the voltage signal to the first CPU module, the current measurement module is used for detecting a current signal and transmitting the current signal to the first CPU module, and the first CPU module is used for sampling and processing the voltage signal and the current signal.
Preferably, the voltage detection module includes a capacitance probe, a signal pickup circuit and a first signal conditioning circuit, an output of the capacitance probe is connected to an input end of the signal pickup circuit, an output end of the signal pickup circuit is connected to an input end of the first signal conditioning circuit, and an output end of the first signal conditioning circuit is connected to an input end of the first CPU module.
More preferably, the capacitance probe is used for detecting a high-voltage signal generated by a high-voltage bus of the lightning arrester in a non-contact manner, and the high-voltage signal is picked up by the signal pickup circuit, converted into a standard level signal by the first signal conditioning circuit and transmitted to the first CPU module.
More preferably, the signal wire of the capacitance probe adopts a metal pipe.
The optimization effect brought by the optimization scheme is that the space high-frequency radiation signal can be shielded; meanwhile, the capacitance probe is connected with the signal pickup circuit, and the signal pickup circuit carries out voltage division filtering processing on the signal, so that the interference of the high-frequency signal on the signal to be acquired is avoided.
Preferably, an analog-to-digital conversion input end of the first CPU module is connected to a reference voltage module.
Preferably, the current measuring module comprises a hall current sensor and a second signal conditioning circuit, the output of the hall current sensor is connected with the input end of the second signal conditioning circuit, and the output end of the second signal conditioning circuit is connected with the input end of the first CPU module.
More preferably, the hall current sensor is configured to detect a cable current and output a hall potential, and the hall potential is converted into a standard level signal by the second signal conditioning circuit and transmitted to the first CPU module.
Preferably, the system further comprises a temperature and humidity sensor and an air pressure sensor, wherein the temperature and humidity sensor and the air pressure sensor are connected with the first CPU module through an I2C bus.
Preferably, the first CPU module is further connected to a 4G communication module, and the 4G communication module is configured to transmit data processed by the first CPU module to a cloud.
Preferably, the intelligent control device further comprises a second CPU module, a display and key module, a second power module and a second 485 communication module, wherein the second CPU module is connected with the display and key module and the second 485 communication module, the second power module is used for supplying power to the second CPU module, and the second CPU module is communicated with the first CPU module through the second 485 communication module and the first 485 communication module.
Compared with the prior art, the beneficial effects of the utility model are that:
1. an on-line measuring device structure to combined electrical apparatus GIS equipment arrester retrench, for portable measurement, can regard as the test instrument of a specialty, monitor some key equipment for a long time, also can regard as test instrument to carry out periodic qualitative detection to equipment.
2. A to online detection device's of combined electrical apparatus GIS equipment arrester CPU module can support the multichannel and measure, have scalability, can test multiunit equipment simultaneously.
3. A to online detection device's of combined electrical apparatus GIS equipment arrester electric quantity collection have extremely strong interference immunity and the magnitude of a class characteristics of high accuracy, and the electric voltage volume is gathered for non-contact mode, does not influence the normal operating of system.
Drawings
Fig. 1 is a sampling part schematic structure diagram of an on-line measuring device for a GIS equipment arrester of a combined electrical appliance.
Fig. 2 is a display part structure schematic diagram of an on-line detection device for a lightning arrester of a GIS (gas insulated switchgear) equipment of a combined electrical appliance.
Fig. 3 is a schematic circuit diagram of a first power module according to the present invention.
Fig. 4 is a schematic circuit diagram of a first CPU module according to the present invention.
Fig. 5 is a schematic circuit diagram of a first 485 communication module according to the present invention.
Fig. 6 is a schematic circuit diagram of the voltage detection module of the present invention.
Fig. 7 is a schematic circuit diagram of a current measuring module according to the present invention.
Fig. 8 is a schematic diagram of a reference voltage module circuit according to the present invention.
Fig. 9 is a schematic circuit diagram of a second power module according to the present invention.
Fig. 10 is a schematic circuit diagram of a second CPU module according to the present invention.
Fig. 11 is a schematic circuit diagram of a second 485 communication module according to the present invention.
Fig. 12 is a schematic diagram of a display and key module circuit according to the present invention.
Wherein, 1, a first CPU module; 2. a second CPU module; 3. a capacitance probe 4, a signal pickup circuit; 5. a first signal conditioning circuit; 6. a Hall current sensor; 7. a second signal conditioning circuit; 8. a first power supply module; 9. a reference voltage module; 10. a first 485 communication module; 11. a second power supply module; 12. a second 485 communication module; 13. and a display and key module.
Detailed Description
For a better understanding of the present invention, the contents of the present invention will be further clarified below with reference to the accompanying drawings and examples, but the present invention is not limited to the following examples.
Examples
As shown in fig. 1 and fig. 3 to 5, an online detection device for a lightning arrester of a GIS device of a combined electrical appliance comprises: the intelligent power supply device comprises a first CPU module 1, a voltage detection module, a current measurement module, a first power module 8 and a first 485 communication module 10, wherein the first CPU module 1 is in signal connection with the voltage detection module, the current measurement module and the first 485 communication module 10, and the first power module 8 is used for supplying power for the first CPU module 1. In this embodiment, the first power module 8 is configured to convert a dc 12V voltage into a 5V voltage through a 78M05 integrated chip, so as to supply power to the first CPU module 1.
The voltage detection module is used for sensing and detecting a voltage signal and transmitting the voltage signal to the first CPU module 1, the current measurement module is used for detecting a current signal and transmitting the current signal to the first CPU module 1, and the first CPU module 1 is used for sampling and processing the voltage signal and the current signal. Now, the following is described in detail:
as shown in fig. 6, the voltage detection module includes a capacitance probe 3, a signal pickup circuit 4 and a first signal conditioning circuit 5, an output of the capacitance probe 3 is connected to an input of the signal pickup circuit 4, an output of the signal pickup circuit 4 is connected to an input of the first signal conditioning circuit 5, and an output of the first signal conditioning circuit 5 is connected to an input of the first CPU module 1. The capacitance probe 3 is used for detecting a high-voltage signal generated by a high-voltage bus of the lightning arrester in a non-contact manner, the high-voltage signal is picked up by the signal pickup circuit 4 and converted into a standard level signal by the first signal conditioning circuit 5 to be transmitted to the first CPU module 1.
The signal wire of the capacitance probe 3 is a metal tube, which can play a role in shielding space high-frequency radiation signals; meanwhile, the capacitance probe 3 is connected with the signal pickup circuit 4, and the signal pickup circuit 4 carries out voltage division filtering processing on the signal, so that the interference of a high-frequency signal to a signal to be acquired is avoided.
As shown in fig. 8, the analog-to-digital conversion input end of the first CPU module 1 is connected to a reference voltage module 9, in this embodiment, the reference voltage module 9 uses a precision reference chip MCP1525 to convert a 5V voltage into a 2.5V voltage, and the reference voltage is provided to the analog-to-digital conversion input end of the first CPU module 1 to complete analog-to-digital precision conversion.
As shown in fig. 7, the current measuring module includes a hall current sensor 6 and a second signal conditioning circuit 7, an output of the hall current sensor 6 is connected to an input end of the second signal conditioning circuit 7, and an output end of the second signal conditioning circuit 7 is connected to an input end of the first CPU module 1. The Hall current sensor 6 is used for detecting the current output Hall potential of the lightning arrester cable, and the Hall potential is converted into a standard level signal through the second signal conditioning circuit 7 and transmitted to the first CPU module 1. Select 2 hall current sensor 6 for use in this embodiment, mainly accomplish the current test of current test on the trunk circuit cable conductor and the current test of high frequency motor circuit, owing to adopt hall current sensor 6, can carry out the current test with the direct card of hall current sensor 6 on the cable, need not carry out the cable transformation, can not cause the test condition before changing. After being conditioned by a circuit, the output signal of the Hall current sensor 6 directly enters the first CPU module 1 for calculation processing.
The detection device further comprises a temperature and humidity sensor and an air pressure sensor, wherein the temperature and humidity sensor and the air pressure sensor are connected with the first CPU module 1 through an I2C bus, measured data are transmitted into the first CPU module 1, and then calculation processing is carried out.
The first CPU module 1 is further connected with a 4G communication module, and the 4G communication module is used for transmitting the processing data of the first CPU module 1 to a cloud end. Because the serial port level of the 4G communication module is inconsistent with the serial port level of the single chip microcomputer, the level conversion function of the single chip microcomputer and the 4G communication module is realized by adopting the triode circuit, and meanwhile, the output signal of the 4G communication module is adopted to drive the triode circuit to complete the indication of the working state of the 4G communication module and the connection state of the network and the server.
As shown in fig. 2 and fig. 9 to fig. 12, the detection device further includes a second CPU module 2, a display and key module 13, a second power module 11 and a second 485 communication module 12, the second CPU module 2 is connected to the display and key module 13 and the second 485 communication module 12, the second power module is used for supplying power to the second CPU module 2, and the second CPU module 2 communicates with the first CPU module 1 through the second 485 communication module 12 and the first 485 communication module 10.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an on-line measuring device to combined electrical apparatus GIS equipment arrester which characterized in that includes: the device comprises a first CPU module, a voltage detection module, a current measurement module, a first power module and a first 485 communication module, wherein the first CPU module is connected with the voltage detection module, signals of the current measurement module and the first 485 communication module, and the first power module is used for supplying power to the first CPU module; the voltage detection module is used for sensing and detecting a voltage signal and transmitting the voltage signal to the first CPU module, the current measurement module is used for detecting a current signal and transmitting the current signal to the first CPU module, and the first CPU module is used for sampling and processing the voltage signal and the current signal.
2. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance is characterized in that the voltage detection module comprises a capacitance probe, a signal pickup circuit and a first signal conditioning circuit, wherein the output end of the capacitance probe is connected with the input end of the signal pickup circuit, the output end of the signal pickup circuit is connected with the input end of the first signal conditioning circuit, and the output end of the first signal conditioning circuit is connected with the input end of the first CPU module.
3. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance is characterized in that the capacitance probe is used for detecting a high-voltage signal generated by a high-voltage bus of the lightning arrester in a non-contact manner, and the high-voltage signal is picked up by the signal pickup circuit, converted into a standard level signal by the first signal conditioning circuit and transmitted to the first CPU module.
4. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance according to claim 2, wherein the signal wire of the capacitance probe adopts a metal pipe.
5. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance according to claim 1, wherein the analog-to-digital conversion input end of the first CPU module is connected with a reference voltage module.
6. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance is characterized in that the current measurement module comprises a Hall current sensor and a second signal conditioning circuit, the output end of the Hall current sensor is connected with the input end of the second signal conditioning circuit, and the output end of the second signal conditioning circuit is connected with the input end of the first CPU module.
7. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance according to claim 6, wherein the Hall current sensor is used for detecting the current of the cable to output Hall potential, and the Hall potential is converted into a standard level signal by the second signal conditioning circuit and is transmitted to the first CPU module.
8. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance according to claim 1, further comprising a temperature and humidity sensor and an air pressure sensor, wherein the temperature and humidity sensor and the air pressure sensor are connected with the first CPU module through an I2C bus.
9. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance according to claim 1, wherein the first CPU module is further connected with a 4G communication module, and the 4G communication module is used for transmitting the processing data of the first CPU module to a cloud.
10. The on-line detection device for the lightning arrester of the GIS equipment of the combined electrical appliance is characterized by further comprising a second CPU module, a display and key module, a second power module and a second 485 communication module, wherein the second CPU module is connected with the display and key module and the second 485 communication module, the second power module is used for supplying power for the second CPU module, and the second CPU module is communicated with the first CPU module through the second 485 communication module and the first 485 communication module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022057134.0U CN213423350U (en) | 2020-09-18 | 2020-09-18 | On-line detection device for lightning arrester of GIS (gas insulated switchgear) equipment of combined electrical apparatus |
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| CN202022057134.0U CN213423350U (en) | 2020-09-18 | 2020-09-18 | On-line detection device for lightning arrester of GIS (gas insulated switchgear) equipment of combined electrical apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709025A (en) * | 2022-03-29 | 2022-07-05 | 中铁电气化局集团有限公司 | Rail transit information transmission cable shielding protection method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709025A (en) * | 2022-03-29 | 2022-07-05 | 中铁电气化局集团有限公司 | Rail transit information transmission cable shielding protection method and system |
| CN114709025B (en) * | 2022-03-29 | 2024-03-22 | 中铁电气化局集团有限公司 | Rail transit information transmission cable shielding protection method and system |
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