CN107402342B - Signal regulation protection device and method for partial discharge ultrahigh frequency sensor - Google Patents
Signal regulation protection device and method for partial discharge ultrahigh frequency sensor Download PDFInfo
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- CN107402342B CN107402342B CN201710657161.1A CN201710657161A CN107402342B CN 107402342 B CN107402342 B CN 107402342B CN 201710657161 A CN201710657161 A CN 201710657161A CN 107402342 B CN107402342 B CN 107402342B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses a signal regulating and protecting device of a partial discharge ultrahigh frequency sensor, which comprises: the device comprises an induction voltage protection module, a radio frequency module, an overvoltage pulse absorption module, a first capacitor and a radio frequency interference suppression module. The induction voltage is removed through the induction voltage protection module, the safety of rear-end personnel and an acquisition device is guaranteed, and high-voltage pulse signals of the partial discharge ultrahigh-frequency sensor are quickly and effectively reduced through the voltage pulse absorption module; the radio frequency interference suppression module is used for effectively suppressing the noise of the signal of the partial discharge ultrahigh frequency sensor, and has the functions of conditioning and protecting the whole circuit, so that the circuit is not interfered by noise any more, and the potential safety hazard is greatly reduced.
Description
Technical Field
The invention relates to the field of partial discharge ultrahigh frequency sensors, in particular to a signal regulation and protection device and a signal regulation and protection method of a partial discharge ultrahigh frequency sensor.
Background
At present, the partial discharge ultrahigh frequency sensor directly receives ultrahigh frequency partial discharge detector or ultrahigh frequency partial discharge on-line monitoring system through radio frequency coaxial cable, and the signal that the inside antenna of ultrahigh frequency sensor couples to is not through any processing, directly passes to the rear end, leads to two problems like this, one: interference signals of unnecessary frequency bands can enter a post-stage acquisition module. II, secondly: the induction voltage and the interference signal of the high-voltage pulse signal directly enter the post-stage acquisition module. Therefore, the existing partial discharge ultrahigh frequency sensor signal has the defects of easy interference and large potential safety hazard.
Disclosure of Invention
In order to overcome the defects of the prior art, an object of the present invention is to provide a signal conditioning protection device for a partial discharge uhf sensor, which can solve the problems of easy interference and large potential safety hazard of a signal of the partial discharge uhf sensor.
The second objective of the present invention is to provide a signal conditioning protection method for a partial discharge ultrahigh frequency sensor, which can solve the problems of easy interference and large potential safety hazard of the partial discharge ultrahigh frequency sensor signal.
One of the purposes of the invention is realized by adopting the following technical scheme:
a signal conditioning protection device for a partial discharge uhf sensor, the device comprising: the device comprises an induction voltage protection module, a radio frequency module, an overvoltage pulse absorption module, a first capacitor and a radio frequency interference suppression module, wherein one end of the induction voltage protection module is connected with the radio frequency module, the radio frequency module is used for receiving a preliminary radio frequency signal, the induction voltage protection module is used for discharging induction voltage, and the other end of the induction voltage protection module is grounded;
one end of the overvoltage pulse absorption module is connected with the radio frequency module, and the overvoltage pulse absorption module is used for weakening a high-voltage pulse signal in the preliminary radio frequency signal;
the other end of the overvoltage pulse absorption module is connected with the first capacitor, a first port of the radio frequency interference suppression module is connected with the first capacitor, the radio frequency interference suppression module is used for removing noise in the radio frequency signals, and a second port of the radio frequency interference suppression module is grounded.
The radio frequency interference suppression device comprises a radio frequency interference suppression module, a rear-stage acquisition module and a digital signal conversion module, wherein the radio frequency interference suppression module comprises a third port, the rear-stage acquisition module is connected with the third port of the radio frequency interference suppression module, and the rear-stage acquisition module converts the radio frequency signal into the digital signal.
Furthermore, the overvoltage pulse absorption module comprises a radio frequency discharge tube, a second capacitor, a self-recovery fuse and a microwave diode, wherein one end of the radio frequency discharge tube is connected with the second capacitor, and the other end of the radio frequency discharge tube is grounded; the self-recovery fuse is respectively connected with the second capacitor and one end of the microwave diode, and the other end of the microwave diode is grounded.
Further, the induced voltage protection module is a radio frequency wire-wound inductor.
Further, the radio frequency interference suppression unit is a radio frequency filter.
The second purpose of the invention is realized by adopting the following technical scheme:
a signal conditioning protection method for a partial discharge ultrahigh frequency sensor comprises the following steps:
step A: judging whether the primary radio frequency signal has an induction voltage, if so, releasing the induction voltage, and if not, executing the step B;
and B: judging whether the preliminary radio frequency signal is a high-voltage pulse signal or not, if so, executing a step C, and if not, performing noise suppression processing on the preliminary radio frequency signal;
and C: weakening the preliminary radio frequency signal to obtain a processed radio frequency signal; judging whether the processed radio frequency signal is a medium-voltage pulse signal, if so, cutting off a transmission channel of the processed radio frequency signal, and carrying out voltage clamping processing and noise suppression processing on the transmitted processed radio frequency signal, otherwise, carrying out noise suppression processing on the processed radio frequency signal.
Further, the voltage clamping processing on the processed radio frequency signal specifically includes: clamping the voltage of the processed radio frequency signal to +/-0.7V.
Compared with the prior art, the invention has the beneficial effects that: according to the signal regulation protection device of the partial discharge ultrahigh frequency sensor, the induction voltage is removed through the induction voltage protection module, the safety of rear-end personnel and a collection device is guaranteed, and the high-voltage pulse signals of the partial discharge ultrahigh frequency sensor are quickly and effectively reduced through the voltage pulse absorption module; the radio frequency interference suppression module is used for effectively suppressing the noise of the signal of the partial discharge ultrahigh frequency sensor, and has the functions of conditioning and protecting the whole circuit, so that the circuit is not interfered by noise any more, and the potential safety hazard is greatly reduced.
Drawings
FIG. 1 is a block diagram of a signal conditioning protection device of a partial discharge UHF sensor according to the present invention;
FIG. 2 is a schematic diagram of a signal conditioning protection device of a partial discharge UHF sensor according to the present invention;
fig. 3 is a flow chart of a signal conditioning protection method of a partial discharge uhf sensor according to the present invention.
In the figure 1, a radio frequency module; 2. an induced voltage protection module; 3. an overvoltage pulse absorption module; 31. a radio frequency discharge tube; 32. a second capacitor; 33. a self-healing fuse; 34. a microwave diode; 4. a first capacitor; 5. a radio frequency interference suppression module; 6. and a rear-stage acquisition module.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that, in the premise of no conflict, the following described embodiments or technical features may be arbitrarily combined to form a new embodiment:
a signal conditioning protection device for a partial discharge uhf sensor as shown in fig. 1, the system comprising: the device comprises an induction voltage protection module, a radio frequency module, an overvoltage pulse absorption module, a first capacitor, a radio frequency interference suppression module and a rear-stage acquisition module, wherein the overvoltage pulse absorption module comprises a radio frequency discharge tube, a second capacitor, a self-recovery fuse and a microwave diode. The radio frequency module is used for receiving preliminary radio frequency signals, and the induced voltage protection module is used for releasing induced voltage, overvoltage pulse absorbs the module and is used for weakening high-voltage pulse signals in the preliminary radio frequency signals and guarantee preliminary radio frequency signals's safe transmission, the radio frequency interference suppression module is used for getting rid of noise in the radio frequency signals.
The specific connection mode of each component of the device is shown in a schematic diagram of fig. 2, a radio frequency module 1 is a radio frequency antenna, the radio frequency module 1 is connected with one end of an induction voltage protection module 2, the other end of the induction voltage protection module 2 is grounded, the induction voltage protection module 2 is a radio frequency wire-wound inductor, the radio frequency module 1 is connected with one end of an overvoltage pulse absorption module 3, the other end of the overvoltage pulse absorption module 3 is connected with a first capacitor 4, a radio frequency interference suppression module 5 is a radio frequency filter, and the radio frequency filter is a three-port device and comprises a first port, a second port and a third port; the first port of the radio frequency interference suppression module 5 is connected with the first capacitor 4, the third port of the radio frequency interference suppression module 5 is connected with the rear-stage acquisition module 6, the second port of the radio frequency interference suppression module 5 is grounded, and the rear-stage acquisition module 6 is grounded. The internal connection relationship of the overvoltage pulse absorption module 3 is as shown in fig. 2, one end of the radio frequency discharge tube 31 is connected with the second capacitor 32, and the other end of the radio frequency discharge tube 31 is grounded; one end of the automatic recovery fuse 33 is connected to the second capacitor 32, the other end of the automatic recovery fuse is connected to the microwave diode 34, and one end of the microwave diode 34 is grounded.
When the partial discharge ultrahigh frequency sensor is in a working state, the electrified radio frequency module 1 of the partial discharge ultrahigh frequency sensor receives a preliminary radio frequency signal, the induction voltage protection module 2 has frequency selectivity, the impedance to the ultrahigh frequency signal is extremely large and is equivalent to an open circuit, but the impedance to direct current and power frequency signals is extremely small and is equivalent to a short circuit, and when induction voltage exists in the radio frequency module 1, the induction voltage protection module 2 (namely radio frequency wire-wound inductor) directly discharges the induction voltage through the ground; when the preliminary radio frequency signal passes through the radio frequency discharge tube 31, if the preliminary radio frequency signal is a high-voltage pulse signal, the radio frequency discharge tube 31 weakens the high-voltage pulse signal to obtain a processed radio frequency signal, the processed radio frequency signal passes through the self-recovery fuse 33, once the self-recovery fuse 33 detects that the voltage in the processed radio frequency signal is a medium-voltage pulse signal, the processed radio frequency signal (pulse signal) is cut off and transmitted to the rear-stage acquisition module, and the safety of the rear-stage acquisition module is guaranteed; however, before the processed radio frequency signal is judged to be a pulse signal and the self-recovery fuse 33 is automatically disconnected, part of the processed radio frequency signal still passes through the transmission channel, at the moment, the voltage of the processed radio frequency signal passing through the self-recovery fuse 33 is clamped to +/-0.7V by the microwave diode 34, so that the voltage value is in the safe acquisition range of the rear-stage acquisition module, the medium-voltage pulse signal in the processed radio frequency signal after voltage clamping by the microwave diode 34 passes through the radio frequency interference suppression module 5 (radio frequency filter) to remove noise, mainly remove non-high-frequency interference signals, and enable the non-high-frequency interference signals not to enter the rear-stage acquisition module after grounding; and for the ultrahigh frequency signal of the partial discharge, the ultrahigh frequency signal directly conducts the post-stage acquisition module, and finally enters the post-stage acquisition module 6, and the post-stage acquisition module converts the processed radio frequency signal into a digital signal.
As shown in fig. 3, a signal conditioning protection method for a partial discharge ultrahigh frequency sensor includes:
step A: judging whether the primary radio frequency signal has an induced voltage or not, and acquiring the primary radio frequency signal before the judgment; if yes, the induction voltage is discharged, and if not, the step B is executed;
and B: judging whether the preliminary radio frequency signal is a high-voltage pulse signal or not, if so, executing a step C, and if not, performing noise suppression processing on the preliminary radio frequency signal;
and C: weakening the preliminary radio frequency signal to obtain a processed radio frequency signal; judging whether the processed radio frequency signal is a medium-voltage pulse signal, if so, cutting off a transmission channel of the processed radio frequency signal, and carrying out voltage clamping processing and noise suppression processing on the transmitted processed radio frequency signal, otherwise, carrying out noise suppression processing on the processed radio frequency signal.
The voltage clamping processing of the processed radio frequency signal is specifically as follows: the voltage of the processed radio frequency signal is clamped to +/-0.7V.
In the application, a signal conditioning protection device of partial discharge ultrahigh frequency sensor, get rid of induced voltage through induced voltage protection module, guarantee rear end personnel and collection system's safety, weaken the high-voltage pulse signal in the partial discharge ultrahigh frequency sensor into medium voltage pulse signal through the radio frequency discharge tube, and cut off transmission channel after preventing pulse voltage too high through the self-resuming fuse, the voltage value of the radio frequency signal that microwave clamp diode clamping part passes through, make the voltage value in the acquisition range of back level collection module, use the effectual noise that has suppressed the signal of partial discharge ultrahigh frequency sensor of radio frequency interference suppression mould, the effect of conditioning and protection has been played to whole circuit, make it no longer receive noise interference and very big reduction potential safety hazard.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (7)
1. A signal conditioning protection device for a partial discharge uhf sensor, comprising: the device comprises an induction voltage protection module, a radio frequency module, an overvoltage pulse absorption module, a first capacitor and a radio frequency interference suppression module, wherein one end of the induction voltage protection module is connected with the radio frequency module, the radio frequency module is used for receiving a preliminary radio frequency signal, the induction voltage protection module is used for discharging induction voltage, and the other end of the induction voltage protection module is grounded;
one end of the overvoltage pulse absorption module is connected with the radio frequency module, and the overvoltage pulse absorption module is used for weakening a high-voltage pulse signal in the preliminary radio frequency signal;
the other end of the overvoltage pulse absorption module is connected with the first capacitor, a first port of the radio frequency interference suppression module is connected with the first capacitor, the radio frequency interference suppression module is used for removing noise in the radio frequency signals, and a second port of the radio frequency interference suppression module is grounded.
2. A signal conditioning protection arrangement for a partial discharge uhf sensor as claimed in claim 1, wherein: the radio frequency interference suppression device comprises a radio frequency interference suppression module and a rear-stage acquisition module, wherein the radio frequency interference suppression module further comprises a third port, the rear-stage acquisition module is connected with the third port of the radio frequency interference suppression module, and the rear-stage acquisition module converts radio frequency signals into digital signals.
3. A signal conditioning protection arrangement for a partial discharge uhf sensor as claimed in claim 1, wherein: the overvoltage pulse absorption module comprises a radio frequency discharge tube, a second capacitor, a self-recovery fuse and a microwave diode, one end of the radio frequency discharge tube is connected with the second capacitor, and the other end of the radio frequency discharge tube is grounded; the self-recovery fuse is respectively connected with the second capacitor and one end of the microwave diode, and the other end of the microwave diode is grounded.
4. A signal conditioning protection arrangement for a partial discharge uhf sensor as claimed in claim 1, wherein: the induction voltage protection module is a radio frequency wire-wound inductor.
5. A signal conditioning protection arrangement for a partial discharge uhf sensor as claimed in claim 1, wherein: the radio frequency interference suppression unit is a radio frequency filter.
6. A signal regulation protection method of a partial discharge ultrahigh frequency sensor is characterized by comprising the following steps:
step A: judging whether the primary radio frequency signal has an induction voltage, if so, releasing the induction voltage, and if not, executing the step B;
and B: judging whether the preliminary radio frequency signal is a high-voltage pulse signal or not, if so, executing a step C, and if not, performing noise suppression processing on the preliminary radio frequency signal;
and C: weakening the preliminary radio frequency signal to obtain a processed radio frequency signal; judging whether the processed radio frequency signal is a medium-voltage pulse signal, if so, cutting off a transmission channel of the processed radio frequency signal, and carrying out voltage clamping processing and noise suppression processing on the transmitted processed radio frequency signal, otherwise, carrying out noise suppression processing on the processed radio frequency signal.
7. The signal conditioning protection method for the partial discharge uhf sensor of claim 6, wherein: the voltage clamping processing of the processed radio frequency signal specifically comprises: clamping the voltage of the processed radio frequency signal to +/-0.7V.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776726A (en) * | 2010-01-28 | 2010-07-14 | 广东电网公司电力科学研究院 | Signal receiving conditioner of UHF partial discharge detecting system |
| CN102608502A (en) * | 2012-03-01 | 2012-07-25 | 华北电力大学 | Intelligent ultrahigh frequency local charge sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4445596C2 (en) * | 1994-12-20 | 2002-11-14 | Hagenuk Kmt Kabelmestechnik Gm | Method and device for partial discharge measurement on a cable |
| GB0200867D0 (en) * | 2002-01-15 | 2002-03-06 | Univ Glasgow | Electric motor monitoring system |
| KR100851038B1 (en) * | 2007-11-01 | 2008-08-12 | 한국전기연구원 | Multiple method for removing noise included in partial discharge signal |
| CN105116306B (en) * | 2015-09-09 | 2018-05-15 | 国家电网公司 | The acquisition method and device of substation's partial discharge electrification detection electromagnetic interference |
| CN105137306B (en) * | 2015-09-16 | 2018-06-26 | 杭州柯林电气股份有限公司 | The tracking of superfrequency partial discharge active noise inhibits measuring system and its method of work |
| CN106771935A (en) * | 2017-02-23 | 2017-05-31 | 全球能源互联网研究院 | A kind of extra-high video sensor drawn game portion discharge on-line monitoring system |
| CN207198285U (en) * | 2017-08-03 | 2018-04-06 | 杭州柯林电气股份有限公司 | A kind of Signal Regulation protection device of partial-discharge ultrahigh-frequency sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776726A (en) * | 2010-01-28 | 2010-07-14 | 广东电网公司电力科学研究院 | Signal receiving conditioner of UHF partial discharge detecting system |
| CN102608502A (en) * | 2012-03-01 | 2012-07-25 | 华北电力大学 | Intelligent ultrahigh frequency local charge sensor |
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