CN202433485U - Ultrasonic discharge detecting device of medium voltage switch cabinet - Google Patents
Ultrasonic discharge detecting device of medium voltage switch cabinet Download PDFInfo
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- CN202433485U CN202433485U CN2011205526496U CN201120552649U CN202433485U CN 202433485 U CN202433485 U CN 202433485U CN 2011205526496 U CN2011205526496 U CN 2011205526496U CN 201120552649 U CN201120552649 U CN 201120552649U CN 202433485 U CN202433485 U CN 202433485U
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Abstract
The utility model discloses an ultrasonic discharge detecting device of a medium voltage switch cabinet, which is applied to an intelligent electric network. Three ultrasonic detecting units are positioned on different inner surfaces of the switch cabinet respectively and are connected with a monitoring unit body respectively; the monitoring unit body consists of a switch cabinet monitoring unit, a network communication unit, a power unit, a power filter circuit and three signal processing circuits; the outputs of the three ultrasonic detecting units are connected with the three signal processing circuits respectively; the outputs of three signal processing circuits are connected with the switch cabinet monitoring unit respectively; the switch cabinet monitoring unit is connected with the network communication unit; the power unit is connected with the power filter circuit and then connected with the three ultrasonic detecting units respectively; and the power unit is directly connected with the three signal processing circuits, the switch cabinet monitoring unit and the network communication unit respectively. The ultrasonic discharge detecting device of the medium voltage switch cabinet has the functions of online monitoring and network communication, can reliably detect the state of ultrasonic discharge inside the medium voltage switch cabinet and can fuse and position detection results.
Description
Technical field
Press the intelligent switchboard field during the utility model belongs to, relate in particular to the ultrasound wave discharging detection device of the middle pressure intelligent switchboard that is used for intelligent grid.
Background technology
Intelligent switchboard is an important component part in intelligent power station; Except that basic function with conventional switch cabinet; Also increase intelligent manipulation function, mechanical property on-line monitoring function, function of insulation online monitoring and stablized, reached fast reliable communication function, adapted to the requirement of intelligent grid.
One Chinese patent application number comprises sensor unit, data collector and background computer for " 200920136831.6 " name is called " online detection of switch cubicle shelf depreciation and management system ", and sensor unit comprises electric signal sensor and ultrasonic sensor; Function with online inspection detection and data analysis; Be a kind of portable equipment of patrolling and examining, its defective is: the reliability that does not fixedly mount formula is high, in addition; Sensor is installed too flexible, and it is unreliable to detect; And the number of sensors of same mechanism is less, and the detection that can not carry out same mechanism is merged even the location, and therefore, it is to the on-line monitoring insufficiency face of Medium Voltage Switchgear insulation status.
Summary of the invention
The purpose of the utility model is for the new demand that adapts to intelligent grid a kind of ultrasound wave discharging detection device with Medium Voltage Switchgear of digital measurement, fault judgement and Primary Location and RS485, Ethernet and CAN communication function to be provided.
The technical scheme of the utility model is: be made up of first, second, third ultrasound examination unit and monitoring means body, first, second, third ultrasound examination unit lays respectively on the different inside surface of switch cubicle and connects the monitoring means body respectively; The monitoring means body is made up of switch cubicle monitoring unit, network communication unit, power supply unit, electric source filter circuit and first, second, third signal processing circuit, and the output of first, second, third ultrasound examination unit connects first, second, third signal processing circuit respectively; The output of first, second, third signal processing circuit connects the switch cubicle monitoring unit respectively, and the switch cubicle monitoring unit connects network communication unit; Power supply unit connects first, second, third ultrasound examination unit respectively behind electric source filter circuit, power supply unit directly is connected with first, second, third signal processing circuit, switch cubicle monitoring unit, network communication unit respectively.
The utlity model has on-line monitoring and network communicating function, can carry out reliable detection the ultrasound wave discharged condition in the Medium Voltage Switchgear; Adopt the ultrasound examination unit of three fixed placement, can testing result be merged and the location.
Description of drawings
Fig. 1 is the structure composition frame chart of the utility model;
Fig. 2 is the composition frame chart of the arbitrary unit in the first, second, third ultrasound examination unit 8,9,10 among Fig. 1;
Among the figure: 1. switch cubicle monitoring unit; 2. network communication unit; 3. power supply unit; 4. electric source filter circuit; 5. first signal processing circuit; 6. secondary signal treatment circuit; 7. the 3rd signal processing circuit; 8. the first ultrasound examination unit; 9. the second ultrasound examination unit; 10. the 3rd ultrasound examination unit; 11. monitoring means body; 12. ultrasonic probe; 13. amplifying circuit; 14. high-pass filtering circuit; 15. low-pass filter circuit; 16. baric flow change-over circuit.
Embodiment
As shown in Figure 1; The utility model is made up of first, second, third ultrasound examination unit 8,9,10 and monitoring means body 11; First, second, third ultrasound examination unit 8,9,10 lays respectively on the different inside surface of switch cubicle, and first, second, third ultrasound examination unit 8,9,10 connects monitoring means body 11 respectively.Monitoring means body 11 is made up of switch cubicle monitoring unit 1, network communication unit 2, power supply unit 3, electric source filter circuit 4 and first, second, third signal processing circuit 5,6,7.The output that the output of the first ultrasound examination unit 8 connects output connection secondary signal treatment circuit 6, the three ultrasound examination unit 10 of first signal processing circuit, 5, the second ultrasound examination unit 9 connects the 3rd signal processing circuit 7.The output of first, second, third signal processing circuit 5,6,7 connects switch cubicle monitoring unit 1 respectively; Switch cubicle monitoring unit 1 is made up of DSP, clock, ferroelectric, RAM and card reader, and the different port of DSP connects clock, ferroelectric, RAM and card reader respectively.The output of first, second, third signal processing circuit 5,6,7 connects the input port of DSP respectively.Switch cubicle monitoring unit 1 connects network communication unit 2, and network communication unit 2 links to each other with DSP in the switch cubicle monitoring unit 1, and network communication unit 2 passes through RS485, CAN or Ethernet and links to each other with the upper station control computer.
Power supply unit 3 connects first, second, third ultrasound examination unit 8,9,10 respectively behind electric source filter circuit 4; Electric source filter circuit 4 is a two-port network; It is single to flow to three ultrasound examinations after the electric energy filtering of electric source filter circuit 4 with power supply unit 3, also stops simultaneously to be delivered to the interference anti-pass of introducing on the power lead of three ultrasound examination unit and to return in the monitoring means body 11.Power supply unit 3 directly is connected with first, second, third signal processing circuit 5,6,7, switch cubicle monitoring unit 1, network communication unit 2 respectively.
Like Fig. 2, the structure of first, second, third ultrasound examination unit 8,9,10 is formed identical, composes in series mutually successively by ultrasonic probe 12, amplifying circuit 13, high-pass filtering circuit 14, low-pass filter circuit 15 and baric flow change-over circuit 16.Power supply unit 3 connects amplifying circuit 13, high-pass filtering circuit 14, low-pass filter circuit 15 and baric flow change-over circuit 16 respectively behind electric source filter circuit 4, power supply is provided.
Ultrasonic probe 12 is selected highly sensitive ultrasonic probe for use, and frequency span is 20 to 180KHz.It is the in-phase amplification circuit of core that amplifying circuit 13 adopts with highly sensitive amplifier.The ultrasonic signal of ultrasonic probe 12 detected voltage form is amplified.High-pass filtering circuit 14 is the active high-pass filtering circuit of second order, and its corner frequency design is carried out high-pass filtering at the 20KHz place with the ultrasound wave voltage signal after the amplification of amplifying circuit 13 outputs.Low-pass filter circuit 15 is the second order active low-pass filter circuit; Its corner frequency design is at the 120KHz place; With after the high-pass filtering of high-pass filtering circuit 14 output and the ultrasound wave voltage signal that amplified carry out LPF, combine high-pass filtering circuit 14 realizations bandpass filtering to the ultrasound wave voltage signal that amplified.Baric flow change-over circuit 16 is used electronic devices and components such as operational amplifier and triode, and the form that amplifies and filtered ultrasound wave voltage signal converts the current signal of agreement to is seen off to monitoring means body 11.
Ultrasonic probe 12 is arranged on the cabinet face place of Medium Voltage Switchgear, and the amplification of ultrasound wave voltage signal, bandpass filtering that the first ultrasound examination unit 8 picks up the ultrasonic probe of cabinet face installation place, place and the current signal that converts the agreement form to are seen off to first signal processing circuit 5; First signal processing circuit 5 is restored and ultrasonic signal that converted current signal cabinet face installation place with 8 detected places, the first ultrasound examination unit for the voltage signal that amplified by its contrary modulation signal and is sent switch cubicle monitoring unit 1 to.The amplification of ultrasound wave voltage signal, bandpass filtering that the ultrasonic probe of cabinet face installation place, 9 places, the second ultrasound examination unit picks up and the current signal that converts the agreement form to are seen off to secondary signal treatment circuit 6; Cabinet face installation place and ultrasonic signal that converted current signal to restores for the voltage signal that amplified by its contrary modulation signal and sends switch cubicle monitoring unit 1 to secondary signal treatment circuit 69 detected places, the second ultrasound examination unit.The amplification of ultrasound wave voltage signal, bandpass filtering that the ultrasonic probe of cabinet face installation place, 10 places, the 3rd ultrasound examination unit picks up and the current signal that converts the agreement form to are seen off to the 3rd signal processing circuit 7; Cabinet face installation place and ultrasonic signal that converted current signal to restores for the voltage signal that amplified by its contrary modulation signal and sends switch cubicle monitoring unit 1 to the 3rd signal processing circuit 7 10 detected places, the 3rd ultrasound examination unit.
Claims (2)
1. the ultrasound wave discharging detection device of a Medium Voltage Switchgear; Be made up of first, second, third ultrasound examination unit (8,9,10) and monitoring means body (11), it is characterized in that: first, second, third ultrasound examination unit (8,9,10) lay respectively on the different inside surface of switch cubicle and connect monitoring means body (11) respectively; Monitoring means body (11) is made up of switch cubicle monitoring unit (1), network communication unit (2), power supply unit (3), electric source filter circuit (4) and first, second, third signal processing circuit (5,6,7), and the output of first, second, third ultrasound examination unit (8,9,10) connects first, second, third signal processing circuit (5,6,7) respectively; The output of first, second, third signal processing circuit (5,6,7) connects switch cubicle monitoring unit (1) respectively, and switch cubicle monitoring unit (1) connects network communication unit (2); Power supply unit (3) connects first, second, third ultrasound examination unit (8,9,10) respectively behind electric source filter circuit (4), power supply unit (3) directly is connected with first, second, third signal processing circuit (5,6,7), switch cubicle monitoring unit (1), network communication unit (2) respectively.
2. the ultrasound wave discharging detection device of a kind of Medium Voltage Switchgear according to claim 1; It is characterized in that: the structure of said first, second, third ultrasound examination unit (8,9,10) is formed identical, composes in series mutually successively by ultrasonic probe (12), amplifying circuit (13), high-pass filtering circuit (14), low-pass filter circuit (15) and baric flow change-over circuit (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205526496U CN202433485U (en) | 2011-12-27 | 2011-12-27 | Ultrasonic discharge detecting device of medium voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205526496U CN202433485U (en) | 2011-12-27 | 2011-12-27 | Ultrasonic discharge detecting device of medium voltage switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN202433485U true CN202433485U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205526496U Expired - Fee Related CN202433485U (en) | 2011-12-27 | 2011-12-27 | Ultrasonic discharge detecting device of medium voltage switch cabinet |
Country Status (1)
| Country | Link |
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| CN (1) | CN202433485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926513A (en) * | 2014-04-30 | 2014-07-16 | 国网河南省电力公司商丘供电公司 | Portable ultrasonic online detection partial discharge diagnostic device |
-
2011
- 2011-12-27 CN CN2011205526496U patent/CN202433485U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926513A (en) * | 2014-04-30 | 2014-07-16 | 国网河南省电力公司商丘供电公司 | Portable ultrasonic online detection partial discharge diagnostic device |
| CN103926513B (en) * | 2014-04-30 | 2016-08-17 | 国家电网公司 | A kind of portable supersonic on-line checking shelf depreciation diagnostic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20181227 |