CN109471056A - A kind of pressure resistance of GIS lightning impulse and partial discharge test checking system and the method for inspection - Google Patents
A kind of pressure resistance of GIS lightning impulse and partial discharge test checking system and the method for inspection Download PDFInfo
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- CN109471056A CN109471056A CN201811641735.7A CN201811641735A CN109471056A CN 109471056 A CN109471056 A CN 109471056A CN 201811641735 A CN201811641735 A CN 201811641735A CN 109471056 A CN109471056 A CN 109471056A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
A kind of pressure resistance of GIS lightning impulse and partial discharge test checking system and the method for inspection, the system include lightning impulse pressure resistance generator (1), voltage transformer group (2), GIS(3), control instruction transmission unit (4), earthing or grounding means (5), signal processing unit (6), current transformer (7), signal capture and clipping unit (8), power module (9), programming interface (10), dsp processor (11), display unit (12) and communication unit (14)；Lightning impulse pressure resistance and partial discharge test detect GIS, control is carried out to test using digital signal processor and test parameters is measured in real time, have many advantages, such as that easy to operate, measurement accuracy is high, good reliability, integrated level are high, strong antijamming capability, for finding defect in time and ensuring that GIS safe operation has a very important significance.
Description
Technical field
The invention belongs to Cubicle Gas-Insulated Switchgear (GIS) inspection technology field, in particular to a kind of GIS thunder
Surge pressure resistance and partial discharge test checking system and inspection technology.
Background technique
GIS is one of most important power equipment in power grid, and operational reliability is directly related to entire electric system
It is safe and stable.In recent years, the fast-developing demand to electric power of national economy is continuously increased, and the market space of GIS is increasingly
Greatly, but in GIS device factory and operational process occur a lot of because the reasons such as manufacturing process, installation quality cause GIS to send out
Raw failure and accident.In order to improve GIS product quality, guarantee power network safety operation, row those skilled in the art constantly explore
Reliable technological means improves GIS mass and fault-detecting ability.
Summary of the invention
Goal of the invention:
A kind of pressure resistance of GIS lightning impulse and partial discharge test checking system and the method for inspection, it is previous the purpose is to solve
The problems of.
Technical solution:
A kind of GIS lightning impulse pressure resistance and partial discharge test checking system, it is characterised in that: the system includes thunder and lightning punching
Hit pressure-resistant generator (1), voltage transformer group (2), GIS (3), control instruction transmission unit (4), earthing or grounding means (5), at signal
Manage unit (6), current transformer (7), signal capture and clipping unit (8), power module (9), programming interface (10), at DSP
Manage device (11), display unit (12) and communication unit (14)；
The wherein experiment position and voltage transformer group of the voltage output end of lightning impulse pressure resistance generator (1) and GIS (3)
(2) signal measurement end is connected；The signal output end of voltage transformer group (2) is handled by signal processing unit (6) and DSP
The signal input part of device (11) is connected；GIS (3) is connected with earthing or grounding means (5), the measurement end connection of current transformer (7)
The branch line of GIS (3) and earthing or grounding means (5) composition, the signal output end and signal capture and clipping unit of current transformer (7)
(8) signal input part is connected, the signal of the signal output end and dsp processor (11) of signal capture and clipping unit (8)
Input terminal is connected, and the output end of power module (9) is connected with the power port of dsp processor (11), programming interface (10)
Signal output end be connected with the programming interface of dsp processor (11)；The signal input part and DSP of display unit (12) are handled
The signal output end of device (11) is connected；The communication interface phase of the signal input part of communication unit (14) and dsp processor (11)
Connection；The control signal output of dsp processor (11) is by control instruction transmission unit (4) and lightning impulse pressure resistance generator
1 control signal input is connected.
The system further includes alarm unit (13) and print unit (15), the signal input part and DSP of alarm unit (13)
The digital signal output end of processor (11) is connected；The signal input part of print unit (15) and the letter of dsp processor (11)
Number output end is connected.
Lightning impulse pressure resistance generator (1) includes regulator (17), increasing apparatus (18), fairing (19), resistance
(R20), capacitor Ca (21), discharging gap (22), resistance Rf (23), capacitor Cb (24), resistance Rd (25), voltage transformer a
(26), resistance Ra (27), resistance Rb (28), resistance Rt (29), voltage transformer b (30) and resistance Rc (31)；
The input terminal of regulator (17) is connected with power grid (16), the output end of regulator (17) and increasing apparatus (18)
Input terminal be connected, one end of increasing apparatus (18) is connected with the input terminal of fairing (19), fairing (19)
Output end is connected with the input terminal of resistance R (20), and the output end of resistance R (20) is defeated with resistance Ra's (27) and capacitor Ca (21)
Enter end to be connected, the output end of capacitor Ca (21) is connected with one end of discharge ball gap (22), the other end of discharge ball gap (22)
It is connected with the input terminal of resistance Rf (23) and resistance Rt (29), the output end and resistance Rc (31) and capacitor Cb of resistance Rf (23)
(24) input terminal is connected, and the output end of capacitor Cb (24) is connected with one end of GIS (3), the other end and tune of GIS (3)
The other end of increasing apparatus (18), the other end of resistance Rb (28), the other end of capacitor Ca (21), resistance Rt (29) it is another
The other end at end, the other end of resistance Rd (25) and capacitor Cb (24) is connected, the other end and resistance Rb of resistance Ra (27)
(28), one end of voltage transformer a (26) is connected, the other end of resistance Rc (31) and resistance Rd (25), voltage transformer b
(30) one end is connected, and the control terminal of discharge ball gap (22) is connected with control instruction transmission unit (4) signal output end.
The bottom of lightning impulse pressure resistance generator (1) has pedestal (1-1), and pedestal (1-1) is faced by temporary fastening device
When fix；
Temporary fastening device includes transverse slat (111), external screw thread upright bar (222) and T-shaped pressing plate；
External screw thread upright bar (222) is two, and two external screw thread upright bars (222) pass through both ends (two outer spiral shells of transverse slat (111)
Line upright bar (222) passes through the through-hole at the both ends of transverse slat (111), and the diameter of the through-hole is straight slightly larger than external screw thread upright bar (222)
Diameter) so that transverse slat (111) can be moved up and down along the axial direction of external screw thread upright bar (222)；
T-shaped pressing plate includes pressing plate upright bar (333-1) and pressing plate transverse slat (333-2), and pressing plate upright bar (333-1) is vertically set
It sets and forms T-shaped structure in the pressing plate transverse slat upper end (333-2) and pressing plate transverse slat (333-2)；
The lower end of transverse slat (111) is provided with standpipe (111-1) and two vertical mandrils (111-2), two vertical mandrils (111-2)
Positioned at the two sides of standpipe (111-1), the upper end of pressing plate upright bar (333-1) puts in standpipe from the lower ending opening of standpipe (111-1)
In (111-1) and pressing plate upright bar (333-1) can relative riser (111-1) do axial stretching movement (pressing plate upright bar (333-1) will not
It is completely disengaged out of standpipe (111-1) completely, this method belongs to the prior art, such as can be on pressing plate upright bar (333-1)
A diameter is done at end, and greater than pressing plate upright bar, (cap of 333-1, the diameter and standpipe (111-1) internal diameter of cap are adapted, then in standpipe
The opening of the bottom (111-1) makees a locking cap, and the center of cap is opened one and led to what pressing plate upright bar (333-1) diameter was adapted
Hole, supply plate upright bar (333-1) pass through, and such pressing plate upright bar would not be completely fallen off！)；It is cased in pressing plate upright bar (333-1)
Spring (333-3), the upper end of spring (333-3) contact standpipe (111-1), and the lower end of spring (333-3) contacts pressing plate transverse slat
(333-2)；The bottom of pressing plate transverse slat (333-2) is provided with universal ball end (333-6) and (is also universal wheel, multi-directional ball, multi-directional ball axis
Hold etc. and to belong to existing component), the both ends of pressing plate transverse slat (333-2) are each provided with a through-hole, and down-pressed pole (333-4) passes through pressing plate
Two through-holes of transverse slat (333-2), and can move up and down in the through hole；(the direct and through-hole diameter of down-pressed pole (333-4)
It is adapted, as long as being just met for down-pressed pole (333-4) can move！)
Two vertical mandrils (111-2) respectively correspond the upper end of two down-pressed poles (333-4) and with two down-pressed poles (333-4)
Upper end keep gap；
The top of external screw thread upright bar (222) is provided with adjusting nut (222-1), and adjusting nut (222-1) is arranged in transverse slat
(111) top；The low side of external screw thread upright bar (222) is provided with sucker (222-2)；(using existing sucker)
In use, sucker (222-2) is adsorbed on ground, pedestal (1-1) is then placed in the bottom universal ball end (333-6)
Portion, fine jade twist adjusting nut (222-1), so that transverse slat (111) moves down and compressed spring (333-3), it is preliminary to pedestal (1-1) one
Preload pressure, at this point, because the effect of universal ball end (333-6), the position of pedestal (1-1) still can be finely adjusted, example
Such as angle！At this point, two vertical mandrils (111-2) do not contact with two down-pressed poles (333-4), keep at a distance！It is right as needed
The position of pedestal (1-1) is finely adjusted, and is then proceeded to fine jade and is twisted adjusting nut (222-1), so that two vertical mandrils (111-2) are continued
It moves down and withstands two down-pressed poles (333-4) and move down, until two down-pressed pole (333-4) lower ends are held out against pedestal (1-1), it is fixed to complete
Position.(at this point, continuing to move down due to transverse slat (111), so that pressure of the universal ball end (333-6) to the upper surface of pedestal (1-1)
It continues growing, forms the first order and compress, and compressed since the effect of two vertical mandrils (111-2) forms the second level, to including thunder and lightning
Impulse withstand voltage generator completes positioning, prevents it from moving or toppling over and affects to implementation process or equipment damage！It needs
When disassembly, reversed fine jade twists adjusting nut (222-1), moves up as the reset of spring (333-3) heads on transverse slat (111), and two vertical
Mandril (111-2) gradually leaves two down-pressed poles (333-4), pressing force is contacted, until spring (333-3) is completely recovered to initially
State, two-stage pressing force release, in addition, drawstring (111-3) can also haul two as two vertical mandril (111-2) move up
Down-pressed pole (333-4) moves up and leaves pedestal (1-1).
Drawstring (111-3) is connected between vertical mandril (111-2) and down-pressed pole (333-4).
The side wall of the upper and lower ends of down-pressed pole (333-4), which is each provided with one, prevents down-pressed pole (333-4) from pressing plate transverse slat
The fixture block (333-5) to fall off on (333-2).
The method of inspection implemented using a kind of above-mentioned GIS lightning impulse pressure resistance and partial discharge test checking system,
It is characterized by: dsp processor (11) sends experiment and starts control instruction, and the instruction is by control after pre-stage test is ready to complete
Instruction sending unit (4) processed arrives lightning impulse pressure resistance generator (1), and lightning impulse pressure resistance starts, and dsp processor (11) is by letter
Number processing unit (6) collection voltages mutual inductor group (2) voltage signal, dsp processor (11) pass through signal capture and clipping unit
(8) and the current signal of current transformer (7), specific voltage and current value is obtained after calculation process, in display unit
(12) shown on, if GIS (3) impulse withstand voltage test and partial discharge test it is unqualified if by alarm unit (13) into
Row alarm.
Pass through print unit (15) and communication unit (14) while alarm unit (13) is alarmed for experimental condition and test
As a result it is printed and is transmitted.
Lightning impulse pressure resistance generator (1) obtains high-voltage impact wave, impact electricity using capacitor charged in parallel, discharged in series
Corrugating is at process: regulator (17) makes the voltage of increasing apparatus (18) rise to required value, and fairing (19) is to capacitor
Ca (21) charging, then triggers discharge ball gap (22) by control instruction transmission unit (4), is that two balls spark conducting；Capacitor
Ca (21) forms the wave head of surge voltage wave through wave front resistance Rf (23) to capacitor Cb (24) charging, charges to capacitor Ca after peak value
(21) it discharges by wave terminal resistance Rt (29) with capacitor Cb (24) and forms the wave rear of surge voltage wave.
When apply test surge voltage appreciation predetermined value when, if GIS (3) is not breakdown or flashover, voltage transformer b
(30) show value is normal peak voltage, if GIS (3) is breakdown or discharges, is equivalent at GIS (3) short-circuit that is, electric
Hold two terminal shortcircuits of Cb (24), the test parameters of impulse circuit changes, and the peak value and waveform of output change therewith, voltage transformer
The show value of b (30) is lower than normal peak voltage value, is put according to the variation of crest voltage, shelf depreciation electric current or GIS (3) breakdown
Electrical phenomena can judge test result.
Advantageous effect:
Live industrial frequency withstand voltage test is pilot project important in the scene GIS commissioning test regulation, and test process can be sent out
The defects of being damaged during insulation filth, setup error, geometric dimension deviation and installation and debugging inside existing GIS device, for
Can judgement and equipment put into operation with decisive meaning, and guarantee the dielectric level of equipment, avoid that insulation thing occurs
Therefore important method.But although industrial frequency withstand voltage test can excite and expose defect, since its duration feature will be led
It causes equipment deficiency to expand, causes more macrolesion to equipment.The characteristics of lightning impulse pressure test is due to its " transient ", is exciting
Defect will not be expanded while with exposure defect, therefore GIS is detected using lightning impulse pressure resistance and partial discharge test,
For finding defect in time and ensuring that GIS safe operation has a very important significance.
Lightning impulse pressure resistance and partial discharge test detect GIS, are carried out using digital signal processor to test
Control and test parameters are measured in real time, with easy to operate, measurement accuracy is high, good reliability, integrated level are high, anti-interference energy
The advantages that power is strong, for finding defect in time and ensuring that GIS safe operation has a very important significance.
In addition, reinforcing the fixation to lightning impulse pressure resistance generator, lightning impulse pressure resistance generator during test is prevented
Unstable, movement is toppled over to injury caused by test process and equipment itself.
Detailed description of the invention
Fig. 1 GIS lightning impulse pressure test process shelf depreciation checking system structure diagram；
Fig. 2 lightning impulse figure of resistance to voltage generator circuits
1, lightning impulse pressure resistance generator；2, voltage transformer group；3,GIS；4, control instruction transmission unit；5, ground connection dress
It sets；6, signal processing unit；7, current transformer；8, signal capture and clipping unit；9, power module；10, programming interface；
11, dsp processor；12, display unit；13, alarm unit；14, communication unit；15, print unit；16, power grid；17, pressure regulation
Device；18, increasing apparatus；19, fairing；20, resistance R；21, capacitor Ca；22, discharging gap；23, resistance Rf；24, capacitor
Cb；25, resistance Rd；26, voltage transformer a；27, resistance Ra；28 resistance Rb；29, resistance Rt；30, voltage transformer b；31, electric
Hinder Rc
Fig. 3 is the structure and use state diagram of temporary fastening device.
Specific embodiment
In order to achieve the above object of the invention, the present invention proposes the pressure resistance of GIS lightning impulse and partial discharge test checking system
And inspection technology, and propose that three kinds of variation of crest voltage, shelf depreciation electric current or GIS disruptive discharge phenomenon test results determine
Method.
The pressure resistance of GIS lightning impulse and partial discharge test checking system structure diagram as shown in Figure 1, checking system by thunder and lightning
Impulse withstand voltage generator 1, voltage transformer group 2, GIS3, control instruction transmission unit 4, earthing or grounding means 5, signal processing unit 6,
Current transformer 7, signal capture and clipping unit 8, power module 9, programming interface 10, dsp processor 11, display unit 12,
Alarm unit 13, communication unit 14, print unit 15, the wherein voltage output end of lightning impulse pressure resistance generator 1 and GIS3
Experiment position is connected with the signal measurement end of voltage transformer group 2, and the signal output end of voltage transformer group 2 is by signal
Reason unit 6 is connected with the signal input part of dsp processor 11, and GIS3 is connected with earthing or grounding means 5, the survey of current transformer 7
Amount end is connect with GIS3 with the branch line that earthing or grounding means 5 forms, the signal output end and signal capture and clipping of current transformer 7
The signal input part of unit 8 is connected, and the signal of signal capture and the signal output end and dsp processor 11 of clipping unit 8 is defeated
Enter end to be connected, the output end of power module 9 is connected with the power port of dsp processor 11, and the signal of programming interface 10 is defeated
Outlet is connected with the programming interface of dsp processor 11, and the signal of the signal input part and dsp processor 11 of display unit 12 is defeated
Outlet is connected, and the signal input part of alarm unit 13 is connected with the digital signal output end of dsp processor 11, communication unit
14 signal input part is connected with the communication interface of dsp processor 11, the signal input part and dsp processor of print unit 15
11 signal output end is connected, and the control signal output of dsp processor 11 is rushed by control instruction transmission unit 4 and thunder and lightning
The control signal input for hitting pressure-resistant generator 1 is connected.
As shown in figure 3, the bottom of lightning impulse pressure resistance generator (1) has pedestal (1-1), pedestal (1-1) passes through interim
Fixed device is fixed temporarily；
Temporary fastening device includes transverse slat (111), external screw thread upright bar (222) and T-shaped pressing plate；
External screw thread upright bar (222) is two, and two external screw thread upright bars (222) pass through both ends (two outer spiral shells of transverse slat (111)
Line upright bar (222) passes through the through-hole at the both ends of transverse slat (111), and the diameter of the through-hole is straight slightly larger than external screw thread upright bar (222)
Diameter) so that transverse slat (111) can be moved up and down along the axial direction of external screw thread upright bar (222)；
T-shaped pressing plate includes pressing plate upright bar (333-1) and pressing plate transverse slat (333-2), and pressing plate upright bar (333-1) is vertically set
It sets and forms T-shaped structure in the pressing plate transverse slat upper end (333-2) and pressing plate transverse slat (333-2)；
The lower end of transverse slat (111) is provided with standpipe (111-1) and two vertical mandrils (111-2), two vertical mandrils (111-2)
Positioned at the two sides of standpipe (111-1), the upper end of pressing plate upright bar (333-1) puts in standpipe from the lower ending opening of standpipe (111-1)
In (111-1) and pressing plate upright bar (333-1) can relative riser (111-1) do axial stretching movement (pressing plate upright bar (333-1) will not
It is completely disengaged out of standpipe (111-1) completely, this method belongs to the prior art, such as can be on pressing plate upright bar (333-1)
A diameter is done at end, and greater than pressing plate upright bar, (cap of 333-1, the diameter and standpipe (111-1) internal diameter of cap are adapted, then in standpipe
The opening of the bottom (111-1) makees a locking cap, and the center of cap is opened one and led to what pressing plate upright bar (333-1) diameter was adapted
Hole, supply plate upright bar (333-1) pass through, and such pressing plate upright bar would not be completely fallen off！)；It is cased in pressing plate upright bar (333-1)
Spring (333-3), the upper end of spring (333-3) contact standpipe (111-1), and the lower end of spring (333-3) contacts pressing plate transverse slat
(333-2)；The bottom of pressing plate transverse slat (333-2) is provided with universal ball end (333-6) and (is also universal wheel, multi-directional ball, multi-directional ball axis
Hold etc. and to belong to existing component), the both ends of pressing plate transverse slat (333-2) are each provided with a through-hole, and down-pressed pole (333-4) passes through pressing plate
Two through-holes of transverse slat (333-2), and can move up and down in the through hole；(the direct and through-hole diameter of down-pressed pole (333-4)
It is adapted, as long as being just met for down-pressed pole (333-4) can move！)
Two vertical mandrils (111-2) respectively correspond the upper end of two down-pressed poles (333-4) and with two down-pressed poles (333-4)
Upper end keep gap；
The top of external screw thread upright bar (222) is provided with adjusting nut (222-1), and adjusting nut (222-1) is arranged in transverse slat
(111) top；The low side of external screw thread upright bar (222) is provided with sucker (222-2)；(using existing sucker)
Drawstring (111-3) is connected between vertical mandril (111-2) and down-pressed pole (333-4).
The side wall of the upper and lower ends of down-pressed pole (333-4), which is each provided with one, prevents down-pressed pole (333-4) from pressing plate transverse slat
The fixture block (333-5) to fall off on (333-2).
In use, sucker (222-2) is adsorbed on ground, pedestal (1-1) is then placed in the bottom universal ball end (333-6)
Portion, fine jade twist adjusting nut (222-1), so that transverse slat (111) moves down and compressed spring (333-3), it is preliminary to pedestal (1-1) one
Preload pressure, at this point, because the effect of universal ball end (333-6), the position of pedestal (1-1) still can be finely adjusted, example
Such as angle！At this point, two vertical mandrils (111-2) do not contact with two down-pressed poles (333-4), keep at a distance！It is right as needed
The position of pedestal (1-1) is finely adjusted, and is then proceeded to fine jade and is twisted adjusting nut (222-1), so that two vertical mandrils (111-2) are continued
It moves down and withstands two down-pressed poles (333-4) and move down, until two down-pressed pole (333-4) lower ends are held out against pedestal (1-1), it is fixed to complete
Position.(at this point, continuing to move down due to transverse slat (111), so that pressure of the universal ball end (333-6) to the upper surface of pedestal (1-1)
It continues growing, forms the first order and compress, and compressed since the effect of two vertical mandrils (111-2) forms the second level, to including thunder and lightning
Impulse withstand voltage generator completes positioning, prevents it from moving or toppling over and affects to implementation process or equipment damage！It needs
When disassembly, reversed fine jade twists adjusting nut (222-1), moves up as the reset of spring (333-3) heads on transverse slat (111), and two vertical
Mandril (111-2) gradually leaves two down-pressed poles (333-4), pressing force is contacted, until spring (333-3) is completely recovered to initially
State, two-stage pressing force release, in addition, drawstring (111-3) can also haul two as two vertical mandril (111-2) move up
Down-pressed pole (333-4) moves up and leaves pedestal (1-1).
The pressure resistance of GIS lightning impulse and the description of the partial discharge test checking system course of work: after pre-stage test is ready to complete,
Dsp processor 11 sends experiment and starts control instruction by control instruction transmission unit 4 to lightning impulse pressure resistance generator 1, thunder
Surge pressure resistance starts, and dsp processor 11 passes through 6 collection voltages mutual inductor group of signal processing unit, 2 voltage signal, DSP processing
Device 11 obtains specific electricity by the current signal of signal capture and clipping unit 8 and current transformer 7 after calculation process
Pressure and current value, show on display unit 12, if the test of GIS3 impulse withstand voltage and partial discharge test are unqualified, lead to
Alarm unit 13 is crossed to alarm, at the same can by print unit 15 and communication unit 14 by experimental condition and test result into
Row printing and transmission.
1 circuit of lightning impulse pressure resistance generator as shown in Fig. 2, lightning impulse pressure resistance generator by power grid 16, regulator
17, increasing apparatus 18, fairing 19, resistance R20, capacitor Ca21, discharging gap 22, resistance Rf23, capacitor Cb24, resistance
Rd25, voltage transformer a26, resistance Ra27, resistance Rb28, resistance Rt29, voltage transformer b30, resistance Rc31 composition, wherein
The output end of power grid 16 is connected with the input terminal of regulator 17, the input of the output end and fairing 18 of regulator 17
End is connected, and the output end of regulator 17 is connected with the input terminal of increasing apparatus 18, one end of increasing apparatus 18 and rectification
The input terminal of device 19 is connected, and the output end of fairing 19 is connected with the input terminal of resistance R20, the output end of resistance 20
It is connected with the input terminal of resistance Ra27 and capacitor Ca21, the output end of capacitor Ca21 is connected with one end of discharge ball gap 22,
The other end of discharge ball gap 22 is connected with the input terminal of resistance Rf23 and resistance Rt29, the output end and resistance of resistance Rf23
The input terminal of Rc31 and capacitor Cb24 are connected and the output end of capacitor Cb24 is connected with one end of GIS3, and GIS3's is another
Hold and increase the other end of pressure device 18, the other end of resistance Rb28, the other end of capacitor Ca21, resistance Rt29 the other end,
The other end of resistance Rd25, the other end of capacitor Cb24 are connected, the other end and resistance Rb28, voltage transformer of resistance Ra27
One end of a26 is connected, and the other end of resistance Rc31 is connected with one end of resistance Rd25, voltage transformer b30, discharge ball gap
22 control terminal is connected with 4 signal output end of control instruction transmission unit.
Lightning impulse pressure resistance generator 1 is a kind of special equipment for generating standard impulse wave, utilizes capacitor charged in parallel, string
Connection electric discharge obtains high-voltage impact wave, and High Voltage Impulse Waveform is at process: regulator 17 rises to the voltage of increasing apparatus 18
Required value, fairing 19 charge to capacitor Ca21, then trigger discharge ball gap 22 by control instruction transmission unit 4, are two balls
Spark conducting.Capacitor Ca21 charges to capacitor Cb24 with forming the wave head of surge voltage wave through wave front resistance Rf23, charges to
Capacitor Ca21 and capacitor Cb24 discharges to form the wave rear of surge voltage wave by wave terminal resistance Rt29 after peak value.
The output voltage signal that current transformer 7 may be implemented with clipping unit 8 in signal capture is quickly captured and is limited
Width guarantees that interference signal cannot be input to dsp processor 11, and the pressure resistance of GIS lightning impulse and partial discharge test process is avoided to believe
Number missing, while also successful of guarantee test.
When applying test surge voltage appreciation predetermined value at that time, if GIS3 is not breakdown or flashover, voltage transformer b30
Show value be normal peak voltage, if GIS3 is breakdown or electric discharge, be equivalent to GIS3 at short circuit, that is, capacitor Cb24
The test parameters of two terminal shortcircuits, impulse circuit changes, and the peak value and waveform of output change therewith, the display of voltage transformer b30
Value is lower than normal peak voltage value, can be right according to the variation of crest voltage, shelf depreciation electric current or GIS3 disruptive discharge phenomenon
Test result is judged.
Claims (10)
1. a kind of GIS lightning impulse pressure resistance and partial discharge test checking system, it is characterised in that: the system includes lightning impulse
Pressure-resistant generator (1), voltage transformer group (2), GIS (3), control instruction transmission unit (4), earthing or grounding means (5), signal processing
Unit (6), current transformer (7), signal capture and clipping unit (8), power module (9), programming interface (10), DSP processing
Device (11), display unit (12) and communication unit (14)；
The wherein experiment position and voltage transformer group (2) of the voltage output end of lightning impulse pressure resistance generator (1) and GIS (3)
Signal measurement end be connected；The signal output end of voltage transformer group (2) passes through signal processing unit (6) and dsp processor
(11) signal input part is connected；GIS (3) is connected with earthing or grounding means (5), and the measurement end of current transformer (7) connects GIS
(3) branch line formed with earthing or grounding means (5), signal output end and signal capture and clipping unit (8) of current transformer (7)
Signal input part be connected, the signal output end of signal capture and clipping unit (8) and the signal of dsp processor (11) input
End is connected, and the output end of power module (9) is connected with the power port of dsp processor (11), the letter of programming interface (10)
Number output end is connected with the programming interface of dsp processor (11)；The signal input part and dsp processor of display unit (12)
(11) signal output end is connected；The signal input part of communication unit (14) is connected with the communication interface of dsp processor (11)
It connects；The control signal output of dsp processor (11) is by control instruction transmission unit (4) and lightning impulse pressure resistance generator 1
Control signal input be connected.
2. a kind of GIS lightning impulse pressure resistance according to claim 1 and partial discharge test checking system, feature exist
In: the system further includes alarm unit (13) and print unit (15), the signal input part and dsp processor of alarm unit (13)
(11) digital signal output end is connected；The signal input part of print unit (15) and the signal of dsp processor (11) export
End is connected.
3. a kind of GIS lightning impulse pressure resistance according to claim 1 or 2 and partial discharge test checking system, feature
Be: lightning impulse pressure resistance generator (1) includes regulator (17), increasing apparatus (18), fairing (19), resistance
(R20), capacitor Ca (21), discharging gap (22), resistance Rf (23), capacitor Cb (24), resistance Rd (25), voltage transformer a
(26), resistance Ra (27), resistance Rb (28), resistance Rt (29), voltage transformer b (30) and resistance Rc (31)；
The input terminal of regulator (17) is connected with power grid (16), and the output end of regulator (17) is defeated with increasing apparatus (18)
Enter end to be connected, one end of increasing apparatus (18) is connected with the input terminal of fairing (19), the output of fairing (19)
End is connected with the input terminal of resistance R (20), the output end and the input terminal of resistance Ra (27) and capacitor Ca (21) of resistance R (20)
It is connected, the output end of capacitor Ca (21) is connected with one end of discharge ball gap (22), the other end and electricity of discharge ball gap (22)
The input terminal of resistance Rf (23) and resistance Rt (29) are connected, the output end and resistance Rc (31) and capacitor Cb (24) of resistance Rf (23)
Input terminal be connected, the output end of capacitor Cb (24) is connected with one end of GIS (3), the other end of GIS (3) and increases pressure
The other end of device (18), the other end of resistance Rb (28), the other end of capacitor Ca (21), resistance Rt (29) the other end, electricity
The other end and the other end of capacitor Cb (24) for hindering Rd (25) are connected, the other end of resistance Ra (27) and resistance Rb (28),
One end of voltage transformer a (26) is connected, the other end of resistance Rc (31) and resistance Rd (25), voltage transformer b (30)
One end is connected, and the control terminal of discharge ball gap (22) is connected with control instruction transmission unit (4) signal output end.
4. a kind of GIS lightning impulse pressure resistance according to claim 1 and partial discharge test checking system, feature exist
In: the bottom of lightning impulse pressure resistance generator (1) has pedestal (1-1), and pedestal (1-1) is temporarily solid by temporary fastening device
It is fixed；
Temporary fastening device includes transverse slat (111), external screw thread upright bar (222) and T-shaped pressing plate；
External screw thread upright bar (222) is two, and two external screw thread upright bars (222) pass through the both ends of transverse slat (111), so that transverse slat
(111) it can be moved up and down along the axial direction of external screw thread upright bar (222)；
T-shaped pressing plate includes pressing plate upright bar (333-1) and pressing plate transverse slat (333-2), and pressing plate upright bar (333-1) is vertically set on
The pressing plate transverse slat upper end (333-2) and pressing plate transverse slat (333-2) form T-shaped structure；
The lower end of transverse slat (111) is provided with standpipe (111-1) and two vertical mandrils (111-2), and two vertical mandrils (111-2) are located at
The upper end of the two sides of standpipe (111-1), pressing plate upright bar (333-1) puts in standpipe (111-1) from the lower ending opening of standpipe (111-1)
Interior and pressing plate upright bar (333-1) energy relative riser (111-1) does axial stretching movement；Spring is cased in pressing plate upright bar (333-1)
(333-3), the upper end of spring (333-3) contact standpipe (111-1), and the lower end of spring (333-3) contacts pressing plate transverse slat (333-
2)；The bottom of pressing plate transverse slat (333-2) is provided with universal ball end (333-6), and the both ends of pressing plate transverse slat (333-2) are each provided with one
A through-hole, down-pressed pole (333-4) pass through two through-holes of pressing plate transverse slat (333-2), and can move up and down in the through hole；
Two vertical mandrils (111-2) respectively correspond the upper end of two down-pressed poles (333-4) and upper with two down-pressed poles (333-4)
End keeps gap；
The top of external screw thread upright bar (222) is provided with adjusting nut (222-1), and adjusting nut (222-1) is arranged in transverse slat (111)
Top；The low side of external screw thread upright bar (222) is provided with sucker (222-2)；
In use, sucker (222-2) is adsorbed on ground, pedestal (1-1) is then placed in the bottom universal ball end (333-6), fine jade
It twists adjusting nut (222-1), so that transverse slat (111) moves down and compressed spring (333-3), gives pedestal (1-1) one preliminary pre-
Compaction forces are as needed finely adjusted the position of pedestal (1-1), then proceed to fine jade and twist adjusting nut (222-1), so that two
Vertical mandril (111-2), which continues to move down and withstand two down-pressed poles (333-4), to be moved down, until two down-pressed pole lower ends (333-4) top
Tight pedestal (1-1), completes positioning.
5. a kind of GIS lightning impulse pressure resistance according to claim 4 and partial discharge test checking system, feature exist
In: drawstring (111-3) is connected between vertical mandril (111-2) and down-pressed pole (333-4).
6. a kind of GIS lightning impulse pressure resistance according to claim 4 or 5 and partial discharge test checking system, feature
Be: the side wall of the upper and lower ends of down-pressed pole (333-4), which is each provided with one, prevents down-pressed pole (333-4) from pressing plate transverse slat
The fixture block (333-5) to fall off on (333-2).
7. being implemented using a kind of GIS lightning impulse pressure resistance described in Claims 2 or 33 and partial discharge test checking system
The method of inspection, it is characterised in that: after pre-stage test is ready to complete, dsp processor (11) sends experiment and starts control instruction, this refers to
It enables and arrives lightning impulse pressure resistance generator (1) by control instruction transmission unit (4), lightning impulse pressure resistance starts, dsp processor
(11) pass through signal processing unit (6) collection voltages mutual inductor group (2) voltage signal, dsp processor (11) passes through signal capture
With the current signal of clipping unit (8) and current transformer (7), specific voltage and current value is obtained after calculation process,
It is shown on display unit (12), passes through alarm if the test of GIS (3) impulse withstand voltage and partial discharge test are unqualified
Unit (13) is alarmed.
8. the method for inspection according to claim 7, it is characterised in that: pass through printing list while alarm unit (13) is alarmed
Experimental condition and test result are printed and are transmitted by first (15) and communication unit (14).
9. the method for inspection according to claim 7, it is characterised in that: lightning impulse pressure resistance generator (1) utilizes capacitor simultaneously
Connection charging, discharged in series obtain high-voltage impact wave, and High Voltage Impulse Waveform is at process: regulator (17) makes increasing apparatus (18)
Voltage rise to required value, fairing (19) charges to capacitor Ca (21), is then triggered by control instruction transmission unit (4)
Discharge ball gap (22) is that two balls spark conducting；Capacitor Ca (21) is through wave front resistance Rf (23) to capacitor Cb (24) charging shape
At the wave head of surge voltage wave, capacitor Ca (21) and capacitor Cb (24) is by wave terminal resistance Rt (29) electric discharge shape after charging to peak value
At the wave rear of surge voltage wave.
10. the method for inspection according to claim 7 or 9, it is characterised in that: test surge voltage appreciation predetermined value when applying
When, if GIS (3) is not breakdown or flashover, the show value of voltage transformer b (30) is normal peak voltage, if GIS (3)
Breakdown or electric discharge is equivalent to short circuit at GIS (3), that is, two terminal shortcircuits of capacitor Cb (24), the test parameters of impulse circuit
Changing, the peak value and waveform of output change therewith, and the show value of voltage transformer b (30) is lower than normal peak voltage value, according to
Variation, shelf depreciation electric current or GIS (3) disruptive discharge phenomenon of crest voltage can judge test result.
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