CN104360241B - Gas-insulated impulse voltage generator unit impacts resistance characteristics pilot system and method - Google Patents
Gas-insulated impulse voltage generator unit impacts resistance characteristics pilot system and method Download PDFInfo
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- CN104360241B CN104360241B CN201410504490.9A CN201410504490A CN104360241B CN 104360241 B CN104360241 B CN 104360241B CN 201410504490 A CN201410504490 A CN 201410504490A CN 104360241 B CN104360241 B CN 104360241B
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- 238000000034 method Methods 0.000 title description 15
- 238000009413 insulation Methods 0.000 claims abstract description 87
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 239000006187 pill Substances 0.000 claims abstract description 29
- 230000005684 electric field Effects 0.000 claims abstract description 9
- 229910018503 SF6 Inorganic materials 0.000 claims description 28
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 28
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 22
- 230000015556 catabolic process Effects 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 11
- 238000010998 test method Methods 0.000 claims description 5
- 239000012212 insulator Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses gas-insulated impulse voltage generator unit and impact resistance characteristics pilot system, the cylinder body of its first hoist cylinder is fixed on sealed insulation tank body base plate, the top of the first hoist cylinder piston rod is fixedly connected with insulation course, the cylinder body of the second hoist cylinder is fixed on sealed insulation tank body base plate, the output terminal of surge voltage lead-in bushing connects one end of high-voltage conductive rod, capacitor, ignition pill gap and resistant series are between high-voltage conductive rod and insulating bar, on insulating bar, cover has conducting ring, between conducting ring and insulating bar, there is gap, conducting ring connects the top of the second hoist cylinder by insulating support, conducting ring ground connection, sealed insulation tank body also offers inflation sample tap, sealed insulation tank body also ground connection.Present invention achieves impulse test under high voltage, experimental result of the present invention can embody the gas-insulated disruptive discharge characteristic of SF6 under severe non-uniform electric field condition.
Description
Technical field
The present invention relates to high-voltage test and insulation technology field, refer to that a kind of gas-insulated impulse voltage generator unit impacts resistance characteristics pilot system and method particularly.
Background technology
Because SF6 (sulfur hexafluoride) gas has the features such as good electrical insulating property and arc extinction performance, maturation is applied to GIS (GasInsulatedSwitchgear, gas-insulating and fully-enclosed combined electrical apparatus), GIL (Gas-InsulatedTransmissionLine, gas-insulated closed power transmission line) etc. high-tension apparatus, effectively improve the said equipment inner structure, thus carry out compactedness design, reduce the said equipment volume.If the high-pressure test devices such as impulse voltage generator adopt enclosure-type SF6 gas confinement insulation system, its volume and weight will reduce greatly, and transport and field erected difficulty are also readily solved.But, impulse voltage generator has that high, the inner one-piece construction of surge voltage is asymmetric, the feature of components and parts shape not rounding, whether insulated support and inner structure can there is edge flashing under high-voltage impact, whether gas gap insulation can be breakdown, all will have influence on the serviceability of impulse voltage generator.In addition, can severe non-uniform electric field be produced when impulse voltage generator runs, affect SF6 gas-insulated characteristic.Therefore, need specific test method and system, to measure and to determine the safe insulation distance range of gas gap, the unit insulation resistance characteristics of checking impulse voltage generator further.
Recent domestic has done many research work based on SF6 gas-insulated impact characteristics.As the one " under surge voltage the most advanced and sophisticated defect device of partial discharge test gas-insulated metal " that the publication number patent of invention that is CN103605051A provides, it is characterized in that: adjustable guide rod and upper aluminum substrate are threaded connection, under can realizing surge voltage, detection is put to GIS office, but do not have special high pressure to introduce design, be not suitable for impulse test under high voltage; Publication number is the one " under surge voltage local discharge of gas-insulator switchgear test unit and method " that the patent of invention of CN103605053A provides, research object is the comparatively uniform GIS device of internal electric field, does not consider the gas-insulated disruptive discharge characteristic of SF6 under severe non-uniform electric field condition.The situation of experimental result reflection is comprehensive not.
Summary of the invention
Object of the present invention will provide a kind of gas-insulated impulse voltage generator unit to impact resistance characteristics pilot system and method exactly, the creepage distance of the automatic adjustments of gas gap insulation distance of this system and method energy and insulating supporting structure, measures the test of unit impact resistance characteristics under can realizing gas-insulated state.
For realizing this object, a kind of gas-insulated impulse voltage generator unit designed by the present invention impacts resistance characteristics pilot system, it is characterized in that: it comprises sealed insulation tank body, insulation course, be arranged on insulating bar on sealed insulation tank body base plate and the first hoist cylinder and the second hoist cylinder, be arranged on the capacitor at insulation course top, ignition pill gap and resistance, be arranged on the surge voltage lead-in bushing on sealed insulation tank body, be arranged on the taper voltage divider on sealed insulation tank body madial wall, wherein, the cylinder body of described first hoist cylinder is fixed on sealed insulation tank body base plate, the top of the first hoist cylinder piston rod is fixedly connected with insulation course, the cylinder body of described second hoist cylinder is fixed on sealed insulation tank body base plate, the output terminal of described surge voltage lead-in bushing connects one end of high-voltage conductive rod, described capacitor, ignition pill gap and resistant series are between the other end and insulating bar top of high-voltage conductive rod, on described insulating bar, cover has conducting ring, between described conducting ring and insulating bar, there is gap, described conducting ring connects the top of the second hoist cylinder piston rod by insulating support, described conducting ring ground connection, described sealed insulation tank body also offers inflation sample tap, described sealed insulation tank body also ground connection.
Impact a test method for resistance characteristics pilot system based on above-mentioned gas insulation impulse voltage generator unit, it comprises the steps:
Step 1: the piston rod of the first hoist cylinder and the second hoist cylinder is all retracted to lowermost end, is filled with sulfur hexafluoride gas by inflation sample tap in sealed insulation tank body;
Step 2: by surge voltage lead-in bushing surge voltage is incorporated in the loop be made up of high-voltage conductive rod, capacitor, ignition pill gap, resistance, insulating bar and conducting ring;
Step 3: increase surge voltage until the value of taper voltage divider is reduced to zero or observe the sulfur hexafluoride gas generation disruptive discharge phenomenon be filled with in sealed insulation tank body from glass window, record surge voltage value now, this value is the sulfur hexafluoride gas breakdown voltage value at conducting ring and lie farthest away place, insulating bar top, and the sulfur hexafluoride gas breakdown voltage value at capacitor, ignition pill gap and resistance and lie farthest away place, sealed insulation tank body top;
Step 4: the position fixing the first hoist cylinder, guarantee capacitor, ignition pill gap and the resistance farthest at distance sealed insulation tank body top, regulate the piston rod of the second hoist cylinder to rise to each different assigned address, obtain the sulfur hexafluoride gas breakdown voltage value of insulating bar when different creepage distance according to the mode of above-mentioned steps 2 and step 3;
Step 5: regulate the second hoist cylinder, guarantee that conducting ring is on insulating bar top, now the creepage distance of insulating bar is maximum, regulate the piston rod of the first hoist cylinder to each different assigned address, obtain sulfur hexafluoride gas breakdown voltage value when capacitor, ignition pill gap and resistance are in different assigned address according to the mode of above-mentioned steps 2 and step 3.
The present invention is compared with existing scheme, achieve impulse test under high voltage, and, the setting position of capacitor, ignition pill gap, resistance and conducting ring can arbitrarily adjust, make experimental result of the present invention can embody the gas-insulated disruptive discharge characteristic of SF6 under severe non-uniform electric field condition, compensate for blank of the prior art.
Generally speaking insulation distance of the present invention is adjustable, can apply HI high impact voltage, and external environment impact is little, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, 1-sealed insulation tank body, 2-insulating bar, the 3-the first hoist cylinder, the 4-the second hoist cylinder, 5-insulation course, 5.1-insulcrete, 5.2-insulating support rod, 6-capacitor, 7-ignition pill gap, 8-resistance, 9-glass window, 10-surge voltage lead-in bushing, 11-taper voltage divider, 12-high-voltage conductive rod, 13-conducting ring, 14-insulating support, 15-inflation sample tap, 16-glass light exposure window.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Gas-insulated impulse voltage generator unit shown in Fig. 1 impacts resistance characteristics pilot system, it comprises sealed insulation tank body 1, insulation course 5, be arranged on the insulating bar 2 on sealed insulation tank body 1 base plate and the first hoist cylinder 3 and the second hoist cylinder 4, be arranged on the capacitor 6 at insulation course 5 top, ignition pill gap 7 and resistance 8, be arranged on the surge voltage lead-in bushing 10 on sealed insulation tank body 1, be arranged on the taper voltage divider 11 on sealed insulation tank body 1 madial wall, wherein, the cylinder body of described first hoist cylinder 3 is fixed on sealed insulation tank body 1 base plate, the top of the first hoist cylinder 3 piston rod is fixedly connected with insulation course 5, the cylinder body of described second hoist cylinder 4 is fixed on sealed insulation tank body 1 base plate, the output terminal of described surge voltage lead-in bushing 10 connects one end of high-voltage conductive rod 12, described capacitor 6, ignition pill gap 7 and resistance 8 are connected between the other end of high-voltage conductive rod 12 and insulating bar 2 top, on described insulating bar 2, cover has conducting ring 13, between described conducting ring 13 and insulating bar 2, there is gap, described conducting ring 13 connects the top of the second hoist cylinder 4 piston rod by insulating support 14, described conducting ring 13 ground connection, described sealed insulation tank body 1 also offers inflation sample tap 15, described sealed insulation tank body 1 also ground connection (sealed insulation tank body 1 is by single point ground connection, the direct ground connection of earthing bar).
In technique scheme, the thickness d of described insulation course 5 obtains U by following formulae discovery
50%=k (pd)
n/ f
m, wherein, U
50%for the breakdown voltage value preset, k, n and m are default constant, and described p is the air pressure in sealed insulation tank body 1, and d is insulation course 5 thickness needing to ask, and f is electric field nonuniformity coefficient.
In technique scheme, described insulation course 5 comprises four layers of insulcrete 5.1 and Duo Gen insulating support rod 5.2, connected by insulating support rod 5.2 between adjacent two layers insulcrete 5.1, the insulcrete 5.1 of the described bottom connects the piston rod of the first hoist cylinder 3, and the insulcrete 5.1 of most top layer is provided with capacitor 6, ignition pill gap 7 and resistance 8.Stagger in insulating support rod 5.2 position of above-mentioned adjacent two layers insulcrete 5.1.Above-mentioned design can make the insulativity of insulation course 5 strengthen (can tolerate the surge voltage of 4000kV), the insulation withstand voltage below capacitor 6, ignition pill gap 7 and resistance 8 is made to be greater than insulation withstand voltage above capacitor 6, ignition pill gap 7 and resistance 8, carrying out smoothly of warranty test process.
In technique scheme, described default constant k is 139.2, and the constant n preset is 0.7347, and the constant m preset is 0.65, and electric field nonuniformity coefficient f is constant, and value is 11.43.
In technique scheme, the sidewall top of described sealed insulation tank body 1 is provided with glass light exposure window 16.The sidewall of described sealed insulation tank body 1 is provided with glass window 9.Above-mentioned glass light exposure window 16 is for providing illumination to sealed insulation tank body 1, and whether the sulfur hexafluoride gas that technician is observed in sealed insulation tank body 1 by glass window 9 disruptive discharge phenomenon occurs.
In technique scheme, capacitor 6, ignition pill gap 7 and resistance 8 can produce non-uniform electric field after powered up.
In technique scheme, capacitor 6 is fixed in the insulating fixing clip groove of epoxy resin making (being positioned at insulation course 5 top), and ignition pill gap 7 is fixed on capacitor 6 side (being positioned at insulation course 5 top) by insulating support; Be connected by damping resistance line between ignition pill gap 7 with capacitor 6.
In technique scheme, insulation course 5 is epoxide resin material.
This pilot system also can carry out the insulation resistance test of direct current 1200kV and power frequency 1200kV and following voltage, and the resistance characteristics test of other gas-insulated mediums.
Impact a test method for resistance characteristics pilot system based on above-mentioned gas insulation impulse voltage generator unit, it comprises the steps:
Step 1: the piston rod of the first hoist cylinder 3 and the second hoist cylinder 4 is all retracted to lowermost end, and (now capacitor 6, ignition pill gap 7 and resistance 8 are 1500mm apart from the insulation distance at sealed insulation tank body 1 top, insulator creepage distance is 4000mm), in sealed insulation tank body 1, be filled with sulfur hexafluoride gas by inflation sample tap 15;
Step 2: surge voltage (this surge voltage can be the substandard standard lightning impulse voltage of IEC60060-3, standard switching impulse voltage, oscillation mode lightning impulse voltage or oscillation mode operating impulse voltage, and above-mentioned four kinds of voltages can make resistance test voltage peak reach more than 3000kV) is incorporated in the loop be made up of high-voltage conductive rod 12, capacitor 6, ignition pill gap 7, resistance 8, insulating bar 2 and conducting ring 13 by surge voltage lead-in bushing 10;
Step 3: increase surge voltage until the value of taper voltage divider 11 is reduced to zero or observe the sulfur hexafluoride gas generation disruptive discharge phenomenon be filled with in sealed insulation tank body 1 from glass window 9, record surge voltage value now, this value is the sulfur hexafluoride gas breakdown voltage value of conducting ring 13 and lie farthest away place, insulating bar 2 top (now a corresponding insulator creepage distance), and the sulfur hexafluoride gas breakdown voltage value at capacitor 6, ignition pill gap 7 and resistance 8 and lie farthest away place, sealed insulation tank body 1 top;
Step 4: the position fixing the first hoist cylinder 3, guarantee capacitor 6, ignition pill gap 7 and resistance 8 farthest at distance sealed insulation tank body 1 top, regulate the piston rod of the second hoist cylinder 4 (step-length with 100mm mono-grade) to rise to each different assigned address, obtain the sulfur hexafluoride gas breakdown voltage value of insulating bar 2 when different creepage distance according to the mode of above-mentioned steps 2 and step 3;
Step 5: regulate the second hoist cylinder 4, guarantee that conducting ring 13 is on insulating bar 2 top, now the creepage distance of insulating bar 2 is maximum, regulate the piston rod (step-length with 100mm mono-grade) of the first hoist cylinder 3 to each different assigned address, obtain sulfur hexafluoride gas breakdown voltage value when capacitor 6, ignition pill gap 7 and resistance 8 are in different assigned address according to the mode of above-mentioned steps 2 and step 3.
In technique scheme, in described sealed insulation tank body 1, the atmospheric pressure value of sulfur hexafluoride gas is 0.35 ~ 0.65MPa scope, is preferably 0.4Mpa.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (8)
1. a gas-insulated impulse voltage generator unit impacts resistance characteristics pilot system, it is characterized in that: it comprises sealed insulation tank body (1), insulation course (5), be arranged on insulating bar (2) on sealed insulation tank body (1) base plate and the first hoist cylinder (3) and the second hoist cylinder (4), be arranged on the capacitor (6) at insulation course (5) top, ignition pill gap (7) and resistance (8), be arranged on the surge voltage lead-in bushing (10) on sealed insulation tank body (1), be arranged on the taper voltage divider (11) on sealed insulation tank body (1) madial wall, wherein, the cylinder body of described first hoist cylinder (3) is fixed on sealed insulation tank body (1) base plate, the top of the first hoist cylinder (3) piston rod is fixedly connected with insulation course (5), the cylinder body of described second hoist cylinder (4) is fixed on sealed insulation tank body (1) base plate, the output terminal of described surge voltage lead-in bushing (10) connects one end of high-voltage conductive rod (12), described capacitor (6), ignition pill gap (7) and resistance (8) are connected between the other end of high-voltage conductive rod (12) and insulating bar (2) top, the upper cover of described insulating bar (2) has conducting ring (13), between described conducting ring (13) and insulating bar (2), there is gap, described conducting ring (13) connects the top of the second hoist cylinder (4) piston rod by insulating support (14), described conducting ring (13) ground connection, described sealed insulation tank body (1) also offers inflation sample tap (15), described sealed insulation tank body (1) also ground connection.
2. gas-insulated impulse voltage generator unit according to claim 1 impacts resistance characteristics pilot system, it is characterized in that: the thickness d of described insulation course (5) obtains U by following formulae discovery
50%=k (pd)
n/ f
m, wherein, U
50%for the breakdown voltage value preset, k, n and m are default constant, and described p is the air pressure in sealed insulation tank body (1), and d is insulation course (5) thickness needing to ask, and f is electric field nonuniformity coefficient.
3. gas-insulated impulse voltage generator unit according to claim 2 impacts resistance characteristics pilot system, it is characterized in that: described insulation course (5) comprises four layers of insulcrete (5.1) and many insulating support rods (5.2), connected by insulating support rod (5.2) between adjacent two layers insulcrete (5.1), the insulcrete (5.1) of the described bottom connects the piston rod of the first hoist cylinder (3), and the insulcrete (5.1) of most top layer is provided with capacitor (6), ignition pill gap (7) and resistance (8).
4. gas-insulated impulse voltage generator unit according to claim 2 impacts resistance characteristics pilot system, it is characterized in that: described default constant k is 139.2, and the constant n preset is 0.7347, and the constant m preset is 0.65.
5. gas-insulated impulse voltage generator unit according to claim 1 impacts resistance characteristics pilot system, it is characterized in that: the sidewall top of described sealed insulation tank body (1) is provided with glass light exposure window (16).
6. gas-insulated impulse voltage generator unit according to claim 1 impacts resistance characteristics pilot system, it is characterized in that: the sidewall of described sealed insulation tank body (1) is provided with glass window (9).
7. impact a test method for resistance characteristics pilot system based on gas-insulated impulse voltage generator unit described in claim 1 ~ 6 any one, it is characterized in that, it comprises the steps:
Step 1: the piston rod of the first hoist cylinder (3) and the second hoist cylinder (4) is all retracted to lowermost end, is filled with sulfur hexafluoride gas by inflation sample tap (15) in sealed insulation tank body (1);
Step 2: by surge voltage lead-in bushing (10) surge voltage is incorporated in the loop be made up of high-voltage conductive rod (12), capacitor (6), ignition pill gap (7), resistance (8), insulating bar (2) and conducting ring (13);
Step 3: increase surge voltage until the value of taper voltage divider (11) is reduced to zero or observe the sulfur hexafluoride gas generation disruptive discharge phenomenon be filled with in sealed insulation tank body (1) from glass window (9), record surge voltage value now, this value is the sulfur hexafluoride gas breakdown voltage value at conducting ring (13) and lie farthest away place, insulating bar (2) top, and capacitor (6), the sulfur hexafluoride gas breakdown voltage value at ignition pill gap (7) and resistance (8) and lie farthest away place, sealed insulation tank body (1) top,
Step 4: the position fixing the first hoist cylinder (3), guarantee capacitor (6), ignition pill gap (7) and resistance (8) farthest at distance sealed insulation tank body (1) top, regulate the piston rod of the second hoist cylinder (4) to rise to each different assigned address, obtain the sulfur hexafluoride gas breakdown voltage value of insulating bar (2) when different creepage distance according to the mode of above-mentioned steps 2 and step 3;
Step 5: regulate the second hoist cylinder (4), guarantee that conducting ring (13) is on insulating bar (2) top, now the creepage distance of insulating bar (2) is maximum, regulate the piston rod of the first hoist cylinder (3) to each different assigned address, obtain sulfur hexafluoride gas breakdown voltage value when capacitor (6), ignition pill gap (7) and resistance (8) are in different assigned address according to the mode of above-mentioned steps 2 and step 3.
8. test method according to claim 7, is characterized in that: the atmospheric pressure value of the interior sulfur hexafluoride gas of described sealed insulation tank body (1) is 0.35 ~ 0.65MPa.
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| CN109655728A (en) * | 2019-01-21 | 2019-04-19 | 西南交通大学 | A kind of impulse voltage generator and the simulation Lightning Test device comprising it |
| CN109633397B (en) * | 2019-01-23 | 2021-02-02 | 武汉大学 | Gas-insulated GIL size effect test electrode device and manufacturing and testing methods thereof |
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| CN112379137B (en) * | 2020-11-30 | 2022-05-10 | 合肥航太电物理技术有限公司 | Test application of direct current electrostatic high-voltage generator |
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| JP2005241297A (en) * | 2004-02-24 | 2005-09-08 | J-Power Systems Corp | Withstand voltage test method of power equipment |
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| US4549132A (en) * | 1982-08-20 | 1985-10-22 | Hitachi, Ltd. | Method of testing and verifying a performance for insulation to ground of a disconnecting switch when breaking a charging current |
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