CN106093734A - Partial discharge pulse based on GIS signal detection generator and method thereof - Google Patents
Partial discharge pulse based on GIS signal detection generator and method thereof Download PDFInfo
- Publication number
- CN106093734A CN106093734A CN201610625496.0A CN201610625496A CN106093734A CN 106093734 A CN106093734 A CN 106093734A CN 201610625496 A CN201610625496 A CN 201610625496A CN 106093734 A CN106093734 A CN 106093734A
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- Prior art keywords
- power supply
- voltage
- partial discharge
- time delay
- precision
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Classifications
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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
-
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The present invention relates to a kind of partial discharge pulse based on GIS signal detection generator, including Switching Power Supply, after voltage source input switch power supply, running voltage is provided for control circuit and numerical control high-precision bipolarity high voltage power supply by Switching Power Supply, described control circuit includes single-chip microcomputer, relay action unit and DA signal feeding unit, it is characterized in that, described single-chip microcomputer connects the control end of numerical control high-precision bipolarity high voltage power supply to form output positive voltage and output negative voltage, described partial discharge pulse generator also includes pulse shaping loop, described pulse shaping loop includes high-voltage capacitance C, current-limiting resistance R, time delay cable and mercoid switch.Another technical scheme of the present invention there is provided a kind of rectangular pulse method for generation based on above-mentioned partial discharge pulse based on GIS signal detection generator.It is an advantage of the invention that the ideal signal source providing a simulation shelf depreciation to Cubicle Gas-Insulated Switchgear ultra high-frequency partial discharge sensor.
Description
Technical field
The present invention relates to a kind of ultrahigh-frequency pulse generator simulating local discharge signal and method thereof, its square wave front edge is steep
High and steep, energy continuous trigger, it is applied to the shelf depreciation of the Cubicle Gas-Insulated Switchgear (GIS) related in electric power network
Detection, belongs to power electronics industry.
Background technology
Partial Discharge Detection contributes to finding the multiple insulation defect within Cubicle Gas-Insulated Switchgear, is to examine
The important means of disconnected Cubicle Gas-Insulated Switchgear whether kilter, in Partial Discharge Detection, superfrequency local
The performance of discharge sensor plays vital effect, and it is when Cubicle Gas-Insulated Switchgear generator discharges
The ultrahigh-frequency signal produced, is converted into the signal of telecommunication by ultrahigh-frequency signal.In order to ensure the stability and accurately of shelf depreciation system
Property, need before putting equipment in service, after maintenance periodically to Cubicle Gas-Insulated Switchgear ultra high-frequency partial discharge sensor
Carry out field-checking.In order to the sensitivity of ultra high-frequency partial discharge sensor is tested, need to seal to gas-insulated metal
Make and break is closed device interior and is injected simulation local discharge signal.
Summary of the invention
It is an object of the invention to provide that a kind of square wave bandwidth is suitable, voltage magnitude accurate, the square-wave generator of frequency superelevation,
It is used for detecting GIS signal.
In order to achieve the above object, a technical scheme of the present invention there is provided a kind of office based on GIS signal detection
Portion's discharge pulse generator, including Switching Power Supply, after voltage source input switch power supply, is control circuit and numerical control by Switching Power Supply
Bipolarity high voltage power supply provides running voltage in high precision, and described control circuit includes single-chip microcomputer, relay action unit and DA letter
Number give cell, it is characterised in that described single-chip microcomputer connect numerical control high-precision bipolarity high voltage power supply control end defeated to be formed
Going out positive voltage and output negative voltage, described partial discharge pulse generator also includes that pulse shaping loop, described pulse shaping are returned
Road includes time delay cable and mercoid switch, the current-limiting resistance that current-limiting resistance R that high-voltage capacitance C, resistance are R1, characteristic impedance are R2
R is serially connected in the two ends of high-voltage capacitance C again after being sequentially connected in series time delay cable, mercoid switch and mating the load that impedance is R3, R1 is remote
More than R2, R2=R3, single-chip microcomputer controls described numerical control high-precision bipolarity high voltage power supply to described by DA signal feeding unit
The voltage of high-voltage capacitance C output, single-chip microcomputer controls mercury relay by relay action unit and then control mercoid switch breaks
Open or close.
Preferably, described relay action unit includes optical coupling isolation circuit and Darlington transistor circuit, optical coupling isolation circuit
Input be connected with the outfan of described single-chip microcomputer, the outfan of optical coupling isolation circuit connects the input of Darlington transistor circuit
End, the outfan of Darlington transistor circuit drives described mercury relay.
Another technical scheme of the present invention there is provided a kind of based on above-mentioned shelf depreciation based on GIS signal detection
The rectangular pulse method for generation of pulse generator, it is characterised in that comprise the following steps into:
It is described high-voltage capacitor charging by described numerical control high-precision bipolarity high voltage power supply, forms the high pressure that amplitude is U0
After, on the time delay cable that characteristic impedance is R2 after current-limiting resistance R, therefore also form on the distribution capacity of time delay cable
Amplitude is the high pressure of U0, when described mercoid switch closes under the control of described control circuit, due to the coupling impedance of load
R3 is equal with the characteristic impedance R2 of time delay cable, therefore the moment closed at described mercoid switch, what load obtained is that amplitude is
The high pressure of 1/2U0, owing to the adhesive of described K mercoid switch causes the impedance in loop to be undergone mutation, remainder amplitude is 1/2U0
High pressure reflect to described numerical control high-precision bipolarity high voltage power supply direction through time delay cable, when reflexing to current-limiting resistance R,
Owing to the impedance R1 of this current-limiting resistance R is far longer than the characteristic impedance R2 of time delay cable, cause the second time of waveform to reflect, formed
Open-circuit reflection, the waveform of reflection is anti-phase, and reflects to load direction with the amplitude of-1/2U0, when arriving load, just with
Original amplitude is that the high pressure phase of 1/2U0 is offset, and then defining an amplitude in load is the high pressure of 1/2U0, and width is
Electromagnetic wave uploads a rectangular pulse of the time passing 2 times at time delay cable.
It is an advantage of the invention that and provide one to Cubicle Gas-Insulated Switchgear ultra high-frequency partial discharge sensor
The ideal signal source of individual simulation shelf depreciation.Traditional Partial discharge signal source voltage magnitude is less than 50V, and pulsewidth 400ns, frequency is less than
50Hz.In the case of the signal source that the present invention provides solves voltage magnitude up to 400V, rising edge remains less than wanting of 300ps
Ask, and pulse width adjustable (10ns-500ns, stepping 50ns), frequency is up to 100Hz (1Hz stepping).
Accompanying drawing explanation
The circuit block diagram of a kind of ultrahigh-frequency pulse generator that Fig. 1 provides for the present invention；
Fig. 2 is relay action unit circuit diagram；
Fig. 3 is that DA gives element circuit figure；
Fig. 4 is pulse shaping loop circuit figure.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As it is shown in figure 1, a kind of based on GIS signal detection the ultrahigh-frequency pulse generator that the present invention provides includes switch electricity
Source, control circuit, high voltage power supply and pulse shaping loop.After the voltage input switch power supply of 220V, Switching Power Supply it is high pressure
Power supply and control circuit provide running voltage.Below main circuit part is further spread out description:
Control circuit:
Control circuit is mainly used in controlling the part such as mercury relay, high voltage power supply.The core of the control circuit of the present invention
It is single-chip microcomputer P89V51RD2, the most also includes other some peripheral circuits and liquid crystal display circuit and function button etc.
Other necessary input and output device a bit, it also includes relay action unit and DA signal feeding unit.
In conjunction with Fig. 2, in relay action unit, the output of single-chip microcomputer P89V51RD2 is through 8255 ECP Extended Capabilities Ports, then
Through optical coupling isolation circuit, prevent relay adhesive from disconnecting and the impulsive disturbance that brings, eventually pass reaching in chip ULN2003
Islington pipe amplifies rear drive mercury relay, and then is formed the mercoid switch K disconnection in loop by mercury relay driving pulse
Or Guan Bi.
As it is shown on figure 3, in DA signal feeding unit, single-chip microcomputer P89V51RD2 is to analog-digital chip MAX531 mono-
12 Bits Serial signals, through digital-to-analogue conversion and after discharge circuit amplifies, then add input resistance after voltage follower circuit
Anti-, produce certain analog voltage amount, be used for supplying high voltage power supply as semaphore, thus the voltage controlling high voltage power supply is defeated
Go out, it is ensured that the software adjustability of waveforms amplitude and precision.
In the present embodiment, high voltage power supply uses numerical control high-precision bipolarity high voltage power supply, and polarity different from the past is rear
The level form of relay switching, single-chip microcomputer P89V51RD2 is directly in numerical control high-precision bipolarity high voltage power supply in the present invention
Control end control positive and negative switching, form positive output voltage or negative output voltage.
Pulse shaping circuit:
Pulse shaping circuit is then to be formed after square wave by Cable delay or directly export, or in connect 50 ohm negative
Export after load.Its physical circuit as shown in Figure 4, including high-voltage capacitance C, impedance be the current-limiting resistance R of R1, characteristic impedance be R2's
Time delay cable 1, mercoid switch K.
In the present embodiment, mercoid switch K selects Japan's Inlet water acupuncture needle mechanical switch to switch as high pressure pulse discharge,
By utilizing overcurrent principle, driving hydrargyrum pin, by this design, in its switching speed can be substantially larger than electronic applications, routine makes
The opening speed (ns level) of electrical switch, pulse front edge can be made to reach about 300ps, be different from the ns level announced before
Square wave, only waveform forward position reach the other pulse generator of picosecond and just can be specifically designed to ultra high-frequency partial discharge sensor and carry
Ideal signal source for a simulation shelf depreciation.The concrete annexation of pulse shaping circuit is:
Current-limiting resistance R is serially connected in the two ends of high-voltage capacitance C after being sequentially connected in series time delay cable 1, switch K and load.Load can
With connect built-in load can also client oneself external, its coupling impedance be R3, in the present embodiment, R3=R2=50 ohm, R1
=100K ohm, is far longer than R2.
Present invention also offers a kind of rectangular pulse method for generation based on above-mentioned pulse generator, comprise the following steps:
Being controlled high voltage power supply by control circuit to charge to high-voltage capacitance C, after charging, the amplitude of high voltage power supply is the output of U0
High pressure after current-limiting resistance R on the time delay cable 1 that characteristic impedance is R2, therefore also shape on the distribution capacity of time delay cable 1
The high pressure having become amplitude to be U0.When mercoid switch K closes, due to R3=R2=50 ohm, therefore in the wink of mercoid switch K Guan Bi
Between, load obtains be amplitude be the high pressure of 1/2U0.Owing to the adhesive of mercoid switch K causes the impedance in loop to be undergone mutation,
Remainder amplitude is that the high pressure of 1/2U0 to reflect to high voltage power supply direction through time delay cable 1, when reflexing to current-limiting resistance R
Time, due to RI=100K ohm, it is far longer than R2, therefore causes the second time of waveform to reflect, form open-circuit reflection, the waveform of reflection
Anti-phase, and reflect to load direction with the amplitude of-1/2U0, when arriving load, it is just 1/2U0's with original amplitude
High pressure phase is offset, and then defining an amplitude in load is the high pressure of 1/2U0, and width is that electromagnetic wave is uploaded at time delay cable
Pass a rectangle arteries and veins of the time of 2 times.
Although the present invention discloses as above with preferred embodiment, so it is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when making a little amendment and perfect, the therefore protection model of the present invention
Enclose when with being as the criterion that claims are defined.
Claims (3)
1. partial discharge pulse based on a GIS signal detection generator, including Switching Power Supply, voltage source input switch power supply
After, Switching Power Supply provide running voltage, described control circuit bag for control circuit and numerical control high-precision bipolarity high voltage power supply
Include single-chip microcomputer, relay action unit and DA signal feeding unit, it is characterised in that it is double that described single-chip microcomputer connects numerical control high-precision
The control end of polarity high voltage power supply is to form output positive voltage and output negative voltage, and described partial discharge pulse generator also includes
Pulse shaping loop, described pulse shaping loop includes that current-limiting resistance R that high-voltage capacitance C, resistance are R1, characteristic impedance are R2's
Time delay cable (1) and mercoid switch (K), current-limiting resistance R is sequentially connected in series time delay cable (1), mercoid switch (K) and coupling impedance and is
Being serially connected in the two ends of high-voltage capacitance C after the load of R3 again, R1 is much larger than R2, R2=R3, and single-chip microcomputer passes through DA signal feeding unit
Controlling the voltage that described numerical control high-precision bipolarity high voltage power supply exports to described high-voltage capacitance C, single-chip microcomputer is moved by relay
Make unit control mercury relay and then control mercoid switch (K) is opened or closed.
A kind of partial discharge pulse based on GIS signal detection generator, it is characterised in that institute
State relay action unit and include optical coupling isolation circuit and Darlington transistor circuit, the input of optical coupling isolation circuit and described monolithic
The outfan of machine is connected, and the outfan of optical coupling isolation circuit connects the input of Darlington transistor circuit, Darlington transistor circuit defeated
Go out end and drive described mercury relay.
3. a rectangular pulse based on partial discharge pulse based on the GIS signal detection generator described in claim 1 is sent out
Generation method, it is characterised in that comprise the following steps into:
It is described high-voltage capacitance (C) charging by described numerical control high-precision bipolarity high voltage power supply, after forming the high pressure that amplitude is U0,
To in time delay cable (1) that characteristic impedance is R2 after current-limiting resistance R, therefore also shape on the distribution capacity of time delay cable (1)
The high pressure having become amplitude to be U0, when described mercoid switch (K) closes under the control of described control circuit, due to load
Join impedance R3 equal with the characteristic impedance R2 of time delay cable (1), therefore the moment closed at described mercoid switch (K), in load
To be amplitude be the high pressure of 1/2U0, owing to the adhesive of described K mercoid switch (K) causes the impedance in loop to be undergone mutation, residue
Partial amplitude is that the high pressure of 1/2U0 reflects to described numerical control high-precision bipolarity high voltage power supply direction through time delay cable (1), when
When reflexing to current-limiting resistance R, owing to the impedance R1 of this current-limiting resistance R is far longer than the characteristic impedance R2 of time delay cable (1), cause
The second time reflection of waveform, forms open-circuit reflection, and the waveform of reflection is anti-phase, and the amplitude with-1/2U0 is anti-to load direction
Penetrate, when arriving load, just offset with the high pressure phase that original amplitude is 1/2U0, then in load, define a width
Value is the high pressure of 1/2U0, and width is that electromagnetic wave uploads a rectangular pulse of the time passing 2 times at time delay cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625496.0A CN106093734A (en) | 2016-08-02 | 2016-08-02 | Partial discharge pulse based on GIS signal detection generator and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610625496.0A CN106093734A (en) | 2016-08-02 | 2016-08-02 | Partial discharge pulse based on GIS signal detection generator and method thereof |
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| CN106093734A true CN106093734A (en) | 2016-11-09 |
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| CN201610625496.0A Pending CN106093734A (en) | 2016-08-02 | 2016-08-02 | Partial discharge pulse based on GIS signal detection generator and method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771932A (en) * | 2017-01-23 | 2017-05-31 | 贵州电网有限责任公司电力科学研究院 | A kind of method of GIS partial discharge signal source and simulation shelf depreciation |
| CN107561468A (en) * | 2017-06-27 | 2018-01-09 | 广东电网有限责任公司佛山供电局 | A kind of superfrequency partial enlargement signal generator |
| CN108362964A (en) * | 2018-02-09 | 2018-08-03 | 北京京航计算通讯研究所 | A kind of high-voltage square-wave clock of simulation complex electromagnetic environment |
| CN108809277A (en) * | 2018-06-25 | 2018-11-13 | 中国人民解放军火箭军工程大学 | A kind of pulse signal generation device |
| CN109212447A (en) * | 2018-08-14 | 2019-01-15 | 国网陕西省电力公司电力科学研究院 | A kind of portable fast pulse generating device and preparation method thereof |
| CN110045199A (en) * | 2019-03-20 | 2019-07-23 | 杭州通鉴科技有限公司 | A kind of EFT/ESD/CS analysis of electromagnetic interference instrument |
| CN110554343A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | Ultrahigh frequency partial discharge signal simulation device |
| CN111416543A (en) * | 2020-03-13 | 2020-07-14 | 华中科技大学 | Square wave pulse power supply for positioning cable intermediate joint |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771932A (en) * | 2017-01-23 | 2017-05-31 | 贵州电网有限责任公司电力科学研究院 | A kind of method of GIS partial discharge signal source and simulation shelf depreciation |
| CN107561468A (en) * | 2017-06-27 | 2018-01-09 | 广东电网有限责任公司佛山供电局 | A kind of superfrequency partial enlargement signal generator |
| CN108362964A (en) * | 2018-02-09 | 2018-08-03 | 北京京航计算通讯研究所 | A kind of high-voltage square-wave clock of simulation complex electromagnetic environment |
| CN110554343A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | Ultrahigh frequency partial discharge signal simulation device |
| CN108809277A (en) * | 2018-06-25 | 2018-11-13 | 中国人民解放军火箭军工程大学 | A kind of pulse signal generation device |
| CN108809277B (en) * | 2018-06-25 | 2021-09-24 | 中国人民解放军火箭军工程大学 | Pulse signal generating device |
| CN109212447A (en) * | 2018-08-14 | 2019-01-15 | 国网陕西省电力公司电力科学研究院 | A kind of portable fast pulse generating device and preparation method thereof |
| CN109212447B (en) * | 2018-08-14 | 2021-08-24 | 国网陕西省电力公司电力科学研究院 | Portable fast pulse generating device and manufacturing method thereof |
| CN110045199A (en) * | 2019-03-20 | 2019-07-23 | 杭州通鉴科技有限公司 | A kind of EFT/ESD/CS analysis of electromagnetic interference instrument |
| CN110045199B (en) * | 2019-03-20 | 2024-05-03 | 杭州通鉴科技有限公司 | EFT/ESD/CS electromagnetic interference analyzer |
| CN111416543A (en) * | 2020-03-13 | 2020-07-14 | 华中科技大学 | Square wave pulse power supply for positioning cable intermediate joint |
| CN111416543B (en) * | 2020-03-13 | 2021-11-19 | 华中科技大学 | Square wave pulse power supply for positioning cable intermediate joint |
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