CN107907800A - A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave - Google Patents

A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave Download PDF

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Publication number
CN107907800A
CN107907800A CN201711123027.XA CN201711123027A CN107907800A CN 107907800 A CN107907800 A CN 107907800A CN 201711123027 A CN201711123027 A CN 201711123027A CN 107907800 A CN107907800 A CN 107907800A
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China
Prior art keywords
electromagnetic wave
transformer
gap
antenna
signal
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Pending
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CN201711123027.XA
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Chinese (zh)
Inventor
辜超
杨祎
周大洲
林颖
黄锐
杜修明
吕俊涛
李程启
白德盟
秦佳峰
朱文兵
周加斌
朱孟兆
朱庆东
王建
王硕
王学磊
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State Grid Corp of China SGCC
Shandong Electric Power Research Institute
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State Grid Corp of China SGCC
Shandong Electric Power Research Institute
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Priority to CN201711123027.XA priority Critical patent/CN107907800A/en
Publication of CN107907800A publication Critical patent/CN107907800A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing 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
    • G01R31/1227Testing 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 of components, parts or materials
    • G01R31/1263Testing 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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08Measuring electromagnetic field characteristics
    • G01R29/0864Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G01R29/0878Sensors; antennas; probes; detectors

Abstract

The invention discloses a kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave, system is used to producing the signal source occurrence of equipment of electromagnetic wave by being arranged on inside transformer, is arranged on and is used to the electromagnetic wave receiving device for receiving electromagnetic wave in the gap of transformer and is connected to the data acquisition equipment of the electromagnetic wave signal that collection electromagnetic wave receiving device receives with the electromagnetic wave receiving device forming;Method adjusts PD clocks by control device and exports PD pulse signals, and gathers electromagnetic wave signal in power transformer gap or internal by antenna sensor and oscillograph, and the detection to transformer gap leakage electromagnetic wave is completed with this;The present invention can not only effectively detect power transformer gap leakage PD electromagnetic wave signals, and provide powerful support to carry out research to the electromagnetic wave regularity of distribution of (inside) in transformer gap.

Description

A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave
Technical field
The present invention relates to partial discharge of transformer Electromagnetic Wave Detection technical field, specifically a kind of transformer gap is let out Reveal the partial discharge detecting system and method for electromagnetic wave.
Background technology
Power transformer is expensive, is the power transmission and distribution core of electric system, and state of insulation is to determine power transformer Device can normal operation core.Shelf depreciation (Partial discharge, PD) causes electric power transformer insulated defect Main cause, while be also the major embodiment of insulation defect, extra-high frequency electromagnetic waves partial discharge detection method is high, clever as a kind of reliability The high detection means with strong antijamming capability of sensitivity, widely should obtain in Partial Discharge in Power Transformer defect inspection field With.
At present, the antenna sensor in power transformer PD superfrequencies Electromagnetic Wave Detection method mainly passes through hand hole, fuel outlet valve It is deep into inside transformer or external by medium window.The electromagnetism that built-in antenna can be shielded effectively in surrounding environment is done Disturb, but there are problems that two:1. built-in antenna can change inside transformer structure, so as to destroy inside transformer electromagnetic field Be uniformly distributed;2. for the transformer in being currently running, Utilities Electric Co. does not allow to transform it.And by increasing medium When the external way of window progress antenna can only be used in transformer production or overhaul, for the voltage device in being currently running But this method can not be used to carry out PD detections.
For the ease of installing and overhauling, (the tub transformer of the company such as ABB and Siemens production removes domestic electrical transformer Usually it is made of outside) head cover and babinet (or babinet and base), by insulating cell between head cover and babinet or babinet and base It is bolted sealing, is formed and couple gap around the transformer nonferromagnetic material of one week, there are PD to lack when inside transformer When falling into, it can be propagated by the electromagnetic wave signal of PD source radiations through connection gap, this is by detecting gap leakage PD Electromagnetic wave signal realizes that inside transformer partial discharge detection provides feasibility.
Although the method for inside transformer Partial Discharge Detection is realized by detecting gap leakage PD electromagnetic wave signals Certain application has been received, but to electromagnetic wave, the propagation characteristic of (inside) is mainly studied by emulation in gap, and There is no the Energy distribution that (inside) in gap is carried out by testing the method for detection to be studied, this is primarily due to be used for electricity Power equipment PD superfrequencies detection antenna sensor size relative to power transformer gap depth (750kV power transformers Gap depth is about 15cm-18cm) for, the two size is very nearly the same, and the performance of antenna sensor is influenced by surrounding metal Very big, when the depth that antenna sensor is inserted into gap is different, the performance of antenna sensor can also change a lot, from And the presence of bivariate is caused, the depth in power transformer gap can not be inserted into come in gap by adjusting antenna sensor Electromagnetic wave energy distribution characteristics carry out experimental study.Therefore, it is preferably real in order to be carried out to the electromagnetic wave regularity of distribution in gap Research is tested, is badly in need of a kind of new transformer leakage electromagnetic wave partial discharge detection scheme.
The content of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave And method, it effectively detects power transformer gap leakage PD electromagnetic wave signals, for (inside) in transformer gap The electromagnetic wave regularity of distribution carry out research and provide powerful support.
The present invention solves its technical problem and adopts the technical scheme that:
On the one hand, the partial discharge detecting system of a kind of transformer gap leakage electromagnetic wave provided in an embodiment of the present invention, can be with Including:
Signal source occurrence of equipment, is arranged on inside transformer, for producing electromagnetic wave;
Electromagnetic wave receiving device, is arranged in the gap of transformer, for receiving electromagnetic wave;
Data acquisition equipment, is connected with the electromagnetic wave receiving device, for gathering the electricity of electromagnetic wave receiving device reception Magnetostatic wave signal.
As a kind of possible implementation of the present embodiment, the signal source occurrence of equipment includes PD clocks and transmitting day Line, the transmitting antenna are connected by 50 ohm coaxial signal wires with the signal output part of PD clocks, and the PD clocks are defeated When going out different voltages, transmitting antenna then exports the high frequency electromagnetic wave signal of varying strength;The electromagnetic wave receiving device includes Antenna sensor, the antenna sensor are horizontally placed in the gap of transformer, and with the sides aligned parallel in gap;The data acquisition Equipment includes oscillograph, and the oscillograph is connected by 50 ohm coaxial signal wires with antenna sensor.
As a kind of possible implementation of the present embodiment, the transmitting antenna uses cylindrical type monopole antenna.
As a kind of possible implementation of the present embodiment, the antenna sensor uses cylindrical type monopole antenna.
As a kind of possible implementation of the present embodiment, the long 5cm of the cylindrical type monopole antenna, a diameter of 1mm, with The coaxial wire terminals of square flange high-frequency feed line SMA are base, and the length of side of the square flange is 1cm.
As a kind of possible implementation of the present embodiment, when the transmitting antenna is towards different directions, transmitting antenna High-frequency electromagnetic intensity of wave corresponding with PD clock output voltages is exported in a respective direction.
As a kind of possible implementation of the present embodiment, depth of the antenna sensor in transformer gap can be into Row is adjusted.
As a kind of possible implementation of the present embodiment, the oscillograph is more than the oscillograph of 5GHz using sample rate.
On the other hand, the partial discharge detection method of a kind of transformer gap leakage electromagnetic wave provided in an embodiment of the present invention, can To comprise the following steps:
Step 1, transformer-cabinet is opened, PD clocks and transmitting antenna are arranged on inside transformer, and day will be launched Line is connected by 50 ohm coaxial signal wires with the signal output part of PD clocks, while by the control terminal of PD clocks with being located at Control device connection outside transformer;
Step 2, sealing will be bolted by insulating cell between the babinet and base of transformer, and will be formed around change The depressor nonferromagnetic material of one week couples gap;
Step 3, antenna sensor is horizontally placed in the gap of transformer, and with the sides aligned parallel in gap, while by antenna Sensor is connected by 50 ohm coaxial signal wires with oscillograph;
Step 4, PD clocks are adjusted by control device and exports PD pulse signals, and pass through antenna sensor and oscillography Electromagnetic wave signal in device collection transformer gap, the detection to transformer gap leakage electromagnetic wave is completed with this.
As a kind of possible implementation of the present embodiment, the detailed process of the step 4 is:
Step 41, adjust the PD pulse signals that crest voltage is specified in the output of PD clocks, and FRPA-Fixed Radiation Pattern Antenna towards certain A definite direction;Depth of the antenna sensor in transformer gap is adjusted respectively, and is passed by oscillograph multi collect antenna The detection signal of sensor data;According to the detection signal of collection come study inside transformer specify crest voltage caused by electromagnetism In the case of direction of wave travel, the regularity of distribution of electromagnetic wave in transformer gap;
Step 42, when PD signal sources specify crest voltage constant in output, transmitting antenna is adjusted respectively towards different Direction;Depth of the antenna sensor in transformer gap is adjusted, and by the inspection of oscillograph multi collect antenna sensor data Survey signal;When being changed according to the detection signal of collection to study inside transformer electromagnetic wave signal direction, electricity in transformer gap The regularity of distribution of magnetostatic wave signal;
Step 43, when ensureing that the direction of transmitting antenna institute direction is constant, changed by the output voltage for adjusting PD clocks The high-frequency electromagnetic intensity of wave of transmitting antenna output, adjusts antenna sensor in the case where PD clocks export different voltages respectively Depth in transformer gap, and by the detection signal of oscillograph multi collect antenna sensor data, according to the inspection of collection When surveying signal to study inside transformer PD Strength Changes, the regularity of distribution of electromagnetic wave signal in gap.
The technical solution of the embodiment of the present invention can have the advantage that as follows:
On the one hand, the signal source hair that technical solution of the embodiment of the present invention produces electromagnetic wave by being arranged on inside transformer to be used for Generating apparatus, be arranged in the gap of transformer (or inside gap) be used for receive electromagnetic wave electromagnetic wave receiving device and with it is described The data acquisition equipment that electromagnetic wave receiving device is connected to the electromagnetic wave signal that collection electromagnetic wave receiving device receives is formed, no The dimensional problem between existing UHF antenna sensor and gap depth is only overcome, can be detected by testing in gap The electromagnetic wave signal in (or inside gap) studies the electromagnetic wave regularity of distribution in (or inside gap) in gap, and solves It can not realize that transformer gap leakage PD electromagnetic wave signals distribution characteristics by testing the problem of detection is studied, has and disappears During being inserted into transformer gap except existing power transformer PD superfrequencies detection antenna sensor, when adjusting insertion depth And the advantages of being influenced by surrounding metal conductor and changing sensor performance, for by transformer gap leakage Electromagnetic Wave Detection come real The further research of PD defect inspections is laid a good foundation inside existing power transformer.
On the other hand, technical solution of the embodiment of the present invention adjusts PD clocks by control device and exports PD pulses letter Number, and the electromagnetic wave signal in power transformer gap (inside gap) is gathered by antenna sensor and oscillograph, it is complete with this The detection of paired transformer gap leakage electromagnetic wave, not only overcomes between existing UHF antenna sensor and gap depth Dimensional problem, can detect in gap the electromagnetic wave signal in (or inside gap) to (or inside gap) in gap by testing The electromagnetic wave regularity of distribution is studied, and is solved and can not be realized that transformer gap leakage PD electromagnetic wave signal distribution characteristics is led to The problem of experiment detection is studied is crossed, there is the existing power transformer PD superfrequencies detection antenna sensor of elimination to be inserted into change During depressor gap, the advantages of influenced when adjusting insertion depth by surrounding metal conductor and change sensor performance, it is Realize that the further research of PD defect inspections inside power transformer is laid by transformer gap leakage Electromagnetic Wave Detection Good basis.
Brief description of the drawings
Fig. 1 is a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave according to an exemplary embodiment Scheme of installation;
Fig. 2 is a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave according to an exemplary embodiment Schematic diagram;
Fig. 3 is a kind of partial discharge detection method of transformer gap leakage electromagnetic wave according to an exemplary embodiment Flow chart;
In figure, 1 signal source occurrence of equipment, 2 electromagnetic wave receiving devices, 3 data acquisition equipments, 4 transformers, 5 transformers Gap.
Embodiment
In order to clarify the technical characteristics of the invention, below by embodiment, and its attached drawing is combined, to this hair It is bright to be described in detail.Following disclosure provides many different embodiments or example is used for realizing the different knots of the present invention Structure.In order to simplify disclosure of the invention, hereinafter the component and setting of specific examples are described.In addition, the present invention can be with Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated Relation between various embodiments are discussed and/or are set.It should be noted that illustrated component is not necessarily to scale in the accompanying drawings Draw.Present invention omits the description to known assemblies and treatment technology and process to avoid the present invention is unnecessarily limiting.
Fig. 1 is a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave according to an exemplary embodiment Scheme of installation.A kind of as shown in Figure 1, partial discharge detection system of transformer gap leakage electromagnetic wave provided in an embodiment of the present invention System, can include:
Signal source occurrence of equipment 1, is arranged on inside transformer 4, for producing electromagnetic wave;
Electromagnetic wave receiving device 2, is arranged in the gap 5 of transformer, for receiving electromagnetic wave;
Data acquisition equipment 3, is connected with the electromagnetic wave receiving device 2, for gathering the reception of electromagnetic wave receiving device Electromagnetic wave signal, and the regularity of distribution of electromagnetic wave signal in transformer gap can be exported.
In a kind of possible implementation, as shown in Fig. 2, the signal source occurrence of equipment includes PD clocks and transmitting Antenna, the transmitting antenna are connected by 50 ohm coaxial signal wires with the signal output part of PD clocks, the PD clocks When exporting different voltages, transmitting antenna then exports the high frequency electromagnetic wave signal of varying strength;The electromagnetic wave receiving device bag Antenna sensor is included, the antenna sensor is horizontally placed in the gap of transformer (or inside gap), and is put down with the edge in gap OK;The data acquisition equipment includes oscillograph, and the oscillograph is connected by 50 ohm coaxial signal wires with antenna sensor.
In a kind of possible implementation, the transmitting antenna uses cylindrical type monopole antenna.
In a kind of possible implementation, the antenna sensor uses cylindrical type monopole antenna.
In a kind of possible implementation, the long 5cm of the cylindrical type monopole antenna, a diameter of 1mm, with square flange The coaxial wire terminals of disk high-frequency feed line SMA are base, and the length of side of the square flange is 1cm.
In a kind of possible implementation, when the transmitting antenna is towards different directions, transmitting antenna is corresponding High-frequency electromagnetic intensity of wave corresponding with PD clock output voltages is exported on direction.
In a kind of possible implementation, the antenna sensor in transformer gap (or inside gap) depth It can be adjusted according to testing scheme.In a kind of possible implementation, the oscillograph is using sample rate more than 5GHz's Oscillograph.
The present embodiment is used to produce the signal source occurrence of equipment of electromagnetic wave, is arranged on transformer by being arranged on inside transformer Gap in be used for receive electromagnetic wave electromagnetic wave receiving device and with the electromagnetic wave receiving device be connected to collection electromagnetism The electromagnetic wave of ripple receiving device reception simultaneously exports the data acquisition equipment structure of the regularity of distribution of electromagnetic wave signal in transformer gap Into, the dimensional problem between existing UHF antenna sensor and gap depth is not only overcome, can be by testing detection seam The electromagnetic wave signal in (or inside gap) studies the electromagnetic wave regularity of distribution in (or inside gap) in gap in gap, and Solve the problems, such as not realizing that transformer gap leakage PD electromagnetic wave signal distribution characteristics is studied by testing detection have There is the existing power transformer PD superfrequencies detection antenna sensor of elimination to be inserted into during transformer gap, it is deep when adjusting insertion The advantages of being influenced by surrounding metal conductor when spending and change sensor performance, to pass through transformer gap leakage Electromagnetic Wave Detection To realize that the further research of PD defect inspections inside power transformer is laid a good foundation.
Fig. 3 is a kind of partial discharge detection method of transformer gap leakage electromagnetic wave according to an exemplary embodiment Flow chart.As shown in figure 3, a kind of partial discharge detection method of transformer gap leakage electromagnetic wave provided in an embodiment of the present invention, can To comprise the following steps:
Step 1, transformer-cabinet is opened, PD clocks and transmitting antenna are arranged on inside transformer, and day will be launched Line is connected by 50 ohm coaxial signal wires with the signal output part of PD clocks, while by the control terminal of PD clocks with being located at Control device connection outside transformer;
Step 2, sealing will be bolted by insulating cell between the babinet and base of transformer, and will be formed around change The depressor nonferromagnetic material of one week couples gap;
Step 3, antenna sensor is horizontally placed in the gap of transformer (or inside gap), and is put down with the edge in gap OK, while by antenna sensor by 50 ohm coaxial signal wires it is connected with oscillograph;
Step 4, PD clocks are adjusted by control device and exports PD pulse signals, and pass through antenna sensor and oscillography The electromagnetic wave signal in (or inside gap), the inspection to transformer gap leakage electromagnetic wave is completed with this in device collection transformer gap Survey.
In a kind of possible implementation, the detailed process of the step 4 is:
Step 41, adjust the PD pulse signals that crest voltage is specified in the output of PD clocks, and FRPA-Fixed Radiation Pattern Antenna towards certain A definite direction;Antenna sensor is adjusted respectively according to Electromagnetic Wave Detection scheme in the power transformer gap set in advance to exist The depth in (or inside gap) in transformer gap, and by the detection signal of oscillograph multi collect antenna sensor data;Root In the case of specifying Electromagnetic Wave Propagation direction caused by crest voltage according to the detection signal of collection studying inside transformer, become The regularity of distribution of (or inside gap) electromagnetic wave in depressor gap;
Step 42, when PD signal sources specify crest voltage constant in output, transmitting antenna is adjusted respectively towards different Direction;In the power transformer gap set in advance Electromagnetic Wave Detection scheme adjust antenna sensor in transformer gap (or Inside gap) depth, and by the detection signal of oscillograph multi collect antenna sensor data;According to the detection signal of collection When changing to study inside transformer electromagnetic wave signal direction, the distribution of (or inside gap) electromagnetic wave signal in transformer gap Rule;
Step 43, when ensureing that the direction of transmitting antenna institute direction is constant, changed by the output voltage for adjusting PD clocks The high-frequency electromagnetic intensity of wave of transmitting antenna output, the electric power set in advance in the case where PD clocks export different voltages respectively In transformer gap Electromagnetic Wave Detection scheme adjust antenna sensor in transformer gap (or inside gap) depth, and by The detection signal of oscillograph multi collect antenna sensor data, it is strong to study inside transformer PD according to the detection signal of collection During degree change, the regularity of distribution of (or inside gap) electromagnetic wave signal in gap.
The present embodiment adjusts PD clocks by control device and exports PD pulse signals, and by antenna sensor and shows The electromagnetic wave signal in (or inside gap), is completed to transformer gap leakage electromagnetism with this in ripple device collection power transformer gap The detection of ripple, not only overcomes the dimensional problem between existing UHF antenna sensor and gap depth, can pass through experiment The electromagnetic wave signal in (or inside gap) grinds the electromagnetic wave regularity of distribution in (or inside gap) in gap in detection gap Study carefully, and solve and can not realize that transformer gap leakage PD electromagnetic wave signals distribution characteristics is studied by testing detection Problem, there is the existing power transformer PD superfrequencies detection antenna sensor of elimination to be inserted into during transformer gap, work as tune The advantages of being influenced by surrounding metal conductor when saving insertion depth and change sensor performance, to pass through transformer gap leakage electricity To realize, further studying for PD defect inspections is laid a good foundation inside power transformer for magnetic wave detection.
The present invention can not only effectively detect power transformer gap leakage PD electromagnetic wave signals, and for becoming The electromagnetic wave regularity of distribution in (or inside gap) carries out research and provides powerful support in depressor gap.
The above is the preferred embodiment of the present invention, for those skilled in the art, Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also regarded as this hair Bright protection domain.

Claims (10)

1. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave, it is characterized in that, including:
Signal source occurrence of equipment, is arranged on inside transformer, for producing electromagnetic wave;
Electromagnetic wave receiving device, is arranged in the gap of transformer, for receiving electromagnetic wave;
Data acquisition equipment, is connected with the electromagnetic wave receiving device, for gathering the electromagnetic wave of electromagnetic wave receiving device reception Signal.
2. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 1, it is characterized in that,
The signal source occurrence of equipment includes PD clocks and transmitting antenna, and the transmitting antenna passes through 50 ohm coaxial signal wires It is connected with the signal output part of PD clocks, when the PD clocks export different voltages, transmitting antenna then exports different strong The high frequency electromagnetic wave signal of degree;
The electromagnetic wave receiving device includes antenna sensor, and the antenna sensor is horizontally placed in the gap of transformer, and with The sides aligned parallel in gap;
The data acquisition equipment includes oscillograph, and the oscillograph is connected by 50 ohm coaxial signal wires and antenna sensor Connect.
3. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 2, it is characterized in that, the hair Penetrate antenna and use cylindrical type monopole antenna.
4. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 2, it is characterized in that, the day Line sensor uses cylindrical type monopole antenna.
5. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as described in claim 3 or 4, it is characterized in that, institute The long 5cm of cylindrical type monopole antenna, a diameter of 1mm are stated, using the coaxial wire terminals of square flange high-frequency feed line SMA as base, institute The length of side for stating square flange is 1cm.
6. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 2, it is characterized in that, the hair When penetrating antenna towards different directions, transmitting antenna exports high frequency corresponding with PD clock output voltages in a respective direction Electromagnetic intensity.
7. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 2, it is characterized in that, the day Depth of the line sensor in transformer gap can be adjusted.
8. a kind of partial discharge detecting system of transformer gap leakage electromagnetic wave as claimed in claim 2, it is characterized in that, it is described to show Ripple device is more than the oscillograph of 5GHz using sample rate.
9. a kind of partial discharge detection method of transformer gap leakage electromagnetic wave, it is characterized in that, comprise the following steps:
Step 1, transformer-cabinet is opened, PD clocks and transmitting antenna are arranged on inside transformer, and transmitting antenna is led to Cross 50 ohm coaxial signal wires to be connected with the signal output part of PD clocks, while by the control terminal of PD clocks and be located at transformation Control device connection outside device;
Step 2, sealing will be bolted by insulating cell between the babinet and base of transformer, and is formed around transformer The nonferromagnetic material connection gap of one week;
Step 3, antenna sensor is horizontally placed in the gap of transformer, and with the sides aligned parallel in gap, while antenna is sensed Device is connected by 50 ohm coaxial signal wires with oscillograph;
Step 4, PD clocks are adjusted by control device and exports PD pulse signals, and adopted by antenna sensor and oscillograph Collect the electromagnetic wave signal in transformer gap, the detection to transformer gap leakage electromagnetic wave is completed with this.
10. a kind of partial discharge detection method of transformer gap leakage electromagnetic wave as claimed in claim 9, it is characterized in that, it is described The detailed process of step 4 is:
Step 41, the PD pulse signals that crest voltage is specified in the output of PD clocks are adjusted, and FRPA-Fixed Radiation Pattern Antenna is true towards some Fixed direction;Depth of the antenna sensor in transformer gap is adjusted respectively, and by oscillograph multi collect antenna sensor The detection signal of data;According to the detection signal of collection come study inside transformer specify crest voltage caused by electromagnetic wave pass In the case of broadcasting direction, the regularity of distribution of electromagnetic wave in transformer gap;
Step 42, when PD signal sources specify crest voltage constant in output, transmitting antenna is adjusted respectively towards different directions; Depth of the antenna sensor in transformer gap is adjusted, and is believed by the detection of oscillograph multi collect antenna sensor data Number;When being changed according to the detection signal of collection to study inside transformer electromagnetic wave signal direction, electromagnetic wave in transformer gap The regularity of distribution of signal;
Step 43, when ensureing that the direction of transmitting antenna institute direction is constant, transmitting is changed by the output voltage for adjusting PD clocks The high-frequency electromagnetic intensity of wave of antenna output, adjusts antenna sensor in the case where PD clocks export different voltages respectively and is becoming Depth in depressor gap, and by the detection signal of oscillograph multi collect antenna sensor data, believed according to the detection of collection During number studying inside transformer PD Strength Changes, the regularity of distribution of electromagnetic wave signal in gap.
CN201711123027.XA 2017-11-14 2017-11-14 A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave Pending CN107907800A (en)

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CN109557432A (en) * 2018-11-30 2019-04-02 西安电子科技大学 A kind of method for measurement of partial discharge
CN109557382A (en) * 2018-11-30 2019-04-02 西安电子科技大学 A kind of electromagnetic radiation measuring method

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CN203870238U (en) * 2013-11-21 2014-10-08 云南省电力设计院 Ultrahigh-frequency sensor arrangement evaluation device for GIS
CN204719183U (en) * 2015-06-15 2015-10-21 南京华帅科技有限公司 Sensor is put in a kind of external transformer UHF office
CN204789893U (en) * 2015-07-22 2015-11-18 广州供电局有限公司 Air gap defect discharge model and GIS defects simulation device
CN105353282A (en) * 2015-11-27 2016-02-24 国家电网公司 Transmission characteristic simulation method and system for partial discharge ultrahigh-frequency electromagnetic wave signal of transformer
CN106199478A (en) * 2016-06-30 2016-12-07 杭州西湖电子研究所 The examination calibration equipment of a kind of high frequency electric method Partial discharge detector and method
CN107192929A (en) * 2017-06-21 2017-09-22 贵州电网有限责任公司电力科学研究院 The GIS Partial discharge signals source system and application method verified for superfrequency monitoring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109557432A (en) * 2018-11-30 2019-04-02 西安电子科技大学 A kind of method for measurement of partial discharge
CN109557382A (en) * 2018-11-30 2019-04-02 西安电子科技大学 A kind of electromagnetic radiation measuring method

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Application publication date: 20180413