CN108037429A - A kind of direct current arrester long wave screening test device and method - Google Patents
A kind of direct current arrester long wave screening test device and method Download PDFInfo
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- CN108037429A CN108037429A CN201810010799.0A CN201810010799A CN108037429A CN 108037429 A CN108037429 A CN 108037429A CN 201810010799 A CN201810010799 A CN 201810010799A CN 108037429 A CN108037429 A CN 108037429A
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- 238000012360 testing method Methods 0.000 title claims abstract description 131
- 238000012216 screening Methods 0.000 title claims abstract description 66
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- 238000005070 sampling Methods 0.000 claims description 15
- 230000001960 triggered effect Effects 0.000 claims description 13
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- 239000003990 capacitor Substances 0.000 claims description 9
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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
- G01R31/1227—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 of components, parts or materials
- G01R31/1236—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 of components, parts or materials of surge arresters
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Abstract
The invention discloses a kind of direct current arrester long wave screening test device, including resistor disc test product, current collector, alternating current-direct current divider, long wave screening test device, impact generating means and high direct voltage generating means, the resistor disc test product connects to form branch with current collector, and the branch both ends are in parallel with alternating current-direct current divider, long wave screening test device, impact generating means and high direct voltage generating means respectively.The present invention true overvoltage operating mode in simulation scene as far as possible, examines the energy capability of direct current arrester valve block, screens out the valve block of existing defects, improves the operational reliability of direct current arrester.
Description
Technical field
The present invention relates to direct current arrester experimental technique field, and in particular to a kind of direct current arrester long wave screening test dress
Put and method.
Background technology
Long range, low-loss, the ultra-high/extra-high voltage DC transmission system of large capacity are built, is China's economic development form
What resource distribution feature determined.The resources advantage in west area is converted into economic advantages by it, promotes regional economic coordination, balance
Development, is conducive to improve electric network composition, improves the security reliability of Operation of Electric Systems.The lasting high speed of China's economy increases at the same time
Long, the continuous of power load rises, the construction of the power plant of large capacity and high-capacity, is all created for the development of DC transmission system
Condition.
Current conversion station is the hinge of DC transmission engineering, is played a crucial role to whole DC transmission engineering, stand in AC and DC set
It is standby expensive, arrester is be unable to do without to the overvoltage protection of main equipment.Neutral bus arrester is to be arranged in current conversion station neutrality
A series of arresters combination on busbar, in straight-flow system normal operation, voltage is very low, but when some operations of generation or failure
When, overvoltage is also easy to produce on neutral bus, will cause to be connected to equipment damage on neutral bus when serious.Therefore, in limitation
Sexupara line overvoltage, protects the safety of equipment on neutral bus, the effect for the neutral bus arrester being installed on neutral bus
Seem extremely important.Be protection direct current field device from overvoltage damage, the arrester need to possess absorption up to tens megajoules,
The even ability of up to a hundred megajoules of energy, is generally composed in parallel by multicolumn arrester, produced when being subjected to impact with equal subsystem
Energy.
Neutral bus surge arrester failure event, serious threat system repeatedly occurs in domestic DC engineering system debug or operation
System safe and stable operation.Through the analysis to phenomenon of the failure, perforation or cracking of most failures for monolithic valve block, but arrester are found
The overvoltage effect that energy bears long duration without departing from global design value, and before neutral surge arrester failure is absorbed, about
50ms~200ms.At present, domestic standard provides：Carried out for the valve block of existing defects using rectangular impulse current resistance test
Screening, test waveform is 2ms square waves, resistance to by 2ms rectangular impulse currents with the actual waveform that bears of arrester there are larger difference
Defect valve block can not effectively be screened out by being put to the test.
The content of the invention
To solve the above-mentioned problems, the present invention provides a kind of direct current arrester long wave screening test device and method, to
Reach the true overvoltage operating mode in simulation scene, screen out the technique effect of the valve block of existing defects.
To achieve the above object, the technical scheme is that：
A kind of direct current arrester long wave screening test device, including resistor disc test product, current collector, alternating current-direct current partial pressure
Device, long wave screening test device, impact generating means and high direct voltage generating means, the resistor disc test product and current collector
Series connection forms branch, the branch both ends respectively with alternating current-direct current divider, long wave screening test device, impact generating means and direct current
High-voltage generator is in parallel.
Further, the long wave screening test device include switch K1, DC charging power supply, capacitor C1~C10, can
Become inductance L1~L10 and triggered gap, the variable reactor L1~L10 to be connected in series, after series connection both ends respectively with switch K1,
Triggered gap connects, and every variable reactor is provided with the centre tap of one or more different induction values；The capacitor C1~
Its high-pressure side of C10 is connected with variable inductance L1~L10 high-voltage taps, and low-pressure end ground connection, chain is formed with variable reactor L1~L10
Formula discharge loop；Described switch K1 one end is connected with variable inductance L1~L10, and the other end is connected with DC charging power supply, described
The low-voltage end ground connection of DC charging power supply；Described triggered gap one end is connected with variable inductance L1~L10, the other end and long wave
Screening test complexes output terminal connects.
Further, the impact generating means includes switch K2, surge generator, and described switch K2 one end is hit with flinging
Generating means output terminal connects, and the other end is connected with resistor disc test product high-pressure side.
Further, the high direct voltage generating means includes switch K3, high voltage direct current generator, described switch K3 one end
It is connected with high direct voltage generating means output terminal, the other end is connected with resistor disc test product high-pressure side.
Further, the current collector uses divertor.
Direct current arrester long wave screening test method, comprises the following steps：
Test before step 1, long wave screening, it comprises the following steps：
Step 11, close K3, applies DC voltage to resistor disc test product by high direct voltage generating means, works as current acquisition
When the output current value of device reaches direct-current reference current, by alternating current-direct current divider, the DC reference for reading resistor disc test product is electric
Pressure, K3 is disconnected after measurement；
Step 12, close K2, applies 30/60 μ s surge voltages to resistor disc test product by impacting generating means, works as electric current
When the output current value of collector reaches operation cooperation electric current, by alternating current-direct current divider, the operation for reading resistor disc test product is residual
Pressure, K2 is disconnected after measurement；
Step 2, long wave screening test, it comprises the following steps：
Step 21, close a switch K1, is charged by DC charging power supply to capacitor C1~C10, adjusting can power transformation
Feel the tap of L1~L10, to obtain the high voltage of different wave length and amplitude, by triggered gap, be applied to resistor disc test product, try
Electrical verification pressure wavelength should be not less than the time specified in equipment code, and resistor disc test product Implantation Energy is design maximum energy；
Step 22, experiment should carry out 6 groups altogether using 3 Secondary Shocks as one group of progress.Each Secondary Shocks interval time cannot in every group
More than 60s, time interval answers long enough so that resistor disc test product is cooled to environment temperature between every group；
Step 23, by alternating current-direct current divider and current collector, gather the voltage on resistor disc test product in experiment every time
With current signal waveform parameter, and analyzed and stored；
Step 24, carry out visual examination to resistor disc test product, if resistor disc test product occurs puncturing or the phenomenon of flashover,
Judge experiment not by not finding the phenomenon of breakdown or flashover such as, carrying out next step experiment；
Tested after step 3, long wave screening, it comprises the following steps：
Step 31, close K3 again, and the resistor disc test product after long wave screening test is applied by high direct voltage generating means
Add DC voltage, when the output current value of current collector reaches direct-current reference current, by alternating current-direct current divider, read length
The DC reference voltage of resistor disc test product after ripple screening test, K3 is disconnected after measurement；
Step 32, close K2 again, applies 30/ to the resistor disc test product after long wave screening test by impacting generating means
60 μ s surge voltages, when the output current value of current collector, which reaches operation, coordinates electric current, by alternating current-direct current divider, read
The operation residual voltage of resistor disc test product after long wave screening test, K2 is disconnected after measurement.
Further, the decision method of result of the test：
When meeting following condition for the moment, direct current arrester long wave screening test does not pass through：
Test product occurs puncturing or flashover；
DC reference voltage change rate is more than 5% before and after test product long wave screening test；
Test product long wave screening test forward/backward operation residual voltage change rate is more than 5%.
Further, direct current arrester long wave screening test is sampling test, and sampling proportion is：
When direct current arrester valve block sum is less than 500, sampling proportion 3%, but sampling number is no less than 10；
When direct current arrester valve block sum is more than or equal to 500, sampling proportion 5%.
Compared with prior art, the present invention its advantage is：The true overvoltage operating mode in simulation scene as far as possible, examination
The energy capability of direct current arrester valve block, screens out the valve block of existing defects, improves the operational reliability of direct current arrester.
Brief description of the drawings
Fig. 1 is the circuit diagram of the present invention；
The implication of reference numeral in figure：1st, resistor disc test product, 2, current collector, 3, alternating current-direct current divider, 4, long wave sieve
Select experimental rig, 5, impact generating means, 6, high direct voltage generating means, 41, DC charging power supply, 42, triggered gap, 51,
Surge generator, 61, high voltage direct current generator.
Embodiment
Present disclosure is described in further details with reference to the accompanying drawings and detailed description.
Embodiment 1：
A kind of direct current arrester long wave screening test device, including resistor disc test product 1, current collector 2, alternating current-direct current partial pressure
Device 3, long wave screening test device 4, impact generating means 5 and high direct voltage generating means 6, the resistor disc test product 1 and electric current
Collector 2 series connection form branch, the electric current of resistor disc test product 1 is flowed through for measuring experiment process, the branch both ends respectively with friendship
Divider 3, long wave screening test device 4, impact generating means 5 and high direct voltage generating means 6 are in parallel, the alternating current-direct current
Divider 3 is used for the direct current and surge voltage at 1 both ends of resistor disc test product during measurement experiment, and the long wave screening test is complete
Device 4, high direct voltage generating means 6 and impact generating means 5 are used to produce long wave screening voltage, the DC voltage needed for experiment
And surge voltage.
Wherein, the long wave screening test device 4 include switch K1, DC charging power supply 41, capacitor C1~C10, can
Become inductance L1~L10 and triggered gap 42, the variable reactor L1~L10 to be connected in series, after series connection both ends respectively with switch
K1, triggered gap 42 connect, and every variable reactor is provided with the centre tap of one or more different induction values, pass through adjusting
Square-wave voltage of the tap of variable reactor L1~L10 using generation wavelength as 2ms~200ms；Its height of the capacitor C1~C10
Pressure side is connected with variable inductance L1~L10 high-voltage taps, low-pressure end ground connection, with variable reactor L1~L10 composition chain type electric discharges
Circuit, to produce the square-wave voltage of 4kV~8kV；Described switch K1 one end is connected with variable inductance L1~L10, the other end with it is straight
Current charge power supply 41 connects, the low-voltage end ground connection of the DC charging power supply 41；Described 42 one end of triggered gap with can power transformation
Feel L1~L10 connections, the other end is connected with 4 output terminal of long wave screening test complexes.
The impact generating means 5 includes switch K2, surge generator 51, and described switch K2 one end is with flinging the raw dress of percussion
The connection of 5 output terminals is put, the other end is connected with 1 high-pressure side of resistor disc test product, to produce 30/60 μ s surge voltages.
The high direct voltage generating means 6 includes switch K3, high voltage direct current generator 61, described switch K3 one end and direct current
6 output terminal of high-voltage generator connects, and the other end is connected with 1 high-pressure side of resistor disc test product, to produce the direct current of 4kV~8kV
Pressure.
The current collector 2 uses divertor.
Direct current arrester long wave screening test method, comprises the following steps：
Test before step 1, long wave screening, it comprises the following steps：
Step 11, close K3, applies DC voltage to resistor disc test product 1 by high direct voltage generating means 6, when electric current is adopted
When the output current value of storage 2 reaches direct-current reference current, by alternating current-direct current divider 3, the direct current for reading resistor disc test product 1 is joined
Voltage is examined, K3 is disconnected after measurement；
Step 12, close K2, applies 30/60 μ s surge voltages to resistor disc test product 1 by impacting generating means 5, works as electricity
When the output current value of stream collector 2 reaches operation cooperation electric current, pass through alternating current-direct current divider 3, read the behaviour of resistor disc test product 1
Make residual voltage, K2 is disconnected after measurement；
Step 2, long wave screening test, it comprises the following steps：
Step 21, close a switch K1, is charged by DC charging power supply 41 to capacitor C1~C10, adjusts variable
The tap of inductance L1~L10, to obtain the high voltage of different wave length and amplitude, by triggered gap 42, is applied to resistor disc examination
Product 1, test voltage wavelength should be not less than the time specified in equipment code, and 1 Implantation Energy of resistor disc test product is design maximum energy
Amount；
Step 22, experiment should carry out 6 groups altogether using 3 Secondary Shocks as one group of progress.Each Secondary Shocks interval time cannot in every group
More than 60s, time interval answers long enough so that resistor disc test product 1 is cooled to environment temperature between every group；
Step 23, by alternating current-direct current divider 3 and current collector 2, gather the electricity on resistor disc test product 1 in experiment every time
Pressure and current signal waveform parameter, and analyzed and stored；
Step 24, carry out visual examination to resistor disc test product 1, if resistor disc test product 1 occurs puncturing or the phenomenon of flashover,
Then judge experiment not by not finding the phenomenon of breakdown or flashover such as, carrying out next step experiment；
Tested after step 3, long wave screening, it comprises the following steps：
Step 31, close K3 again, by high direct voltage generating means 6 to the resistor disc test product 1 after long wave screening test
Apply DC voltage, when the output current value of current collector 2 reaches direct-current reference current, by alternating current-direct current divider 3, read
The DC reference voltage of the resistor disc test product 1 after long wave screening test is taken, K3 is disconnected after measurement；
Step 32, close K2 again, and the resistor disc test product 1 after long wave screening test is applied by impacting generating means 5
30/60 μ s surge voltages, when the output current value of current collector 2, which reaches operation, coordinates electric current, pass through alternating current-direct current divider
3, the operation residual voltage of the resistor disc test product 1 after long wave screening test is read, K2 is disconnected after measurement.
Wherein, the decision method of result of the test：
When meeting following condition for the moment, direct current arrester long wave screening test does not pass through：
Test product occurs puncturing or flashover；
DC reference voltage change rate is more than 5% before and after test product long wave screening test；
Test product long wave screening test forward/backward operation residual voltage change rate is more than 5%.
Direct current arrester long wave screening test is sampling test, and sampling proportion is：
When direct current arrester valve block sum is less than 500, sampling proportion 3%, but sampling number is no less than 10；
When direct current arrester valve block sum is more than or equal to 500, sampling proportion 5%.
Above-described embodiment is in the art the purpose is to be to allow simply to illustrate that the technical concepts and features of the present invention
Those of ordinary skill can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent change or modification that the essence of content according to the present invention is made, should all covers within the scope of the present invention.
Claims (8)
1. a kind of direct current arrester long wave screening test device, it is characterised in that including resistor disc test product, current collector, friendship
Divider, long wave screening test device, impact generating means and high direct voltage generating means, the resistor disc test product and electricity
Stream collector connects to form branch, which fills with alternating current-direct current divider, long wave screening test device, impact respectively
Put in parallel with high direct voltage generating means.
2. direct current arrester long wave screening test device according to claim 1, it is characterised in that the long wave screening examination
Experiment device includes switch K1, DC charging power supply, capacitor C1~C10, variable inductance L1~L10 and triggered gap, it is described can
Become reactor L1~L10 to be connected in series, both ends are connected with switch K1, triggered gap respectively after series connection, and every variable reactor is set
It is equipped with the centre tap of one or more different induction values；Described its high-pressure side of capacitor C1~C10 and variable inductance L1~L10
High-voltage tap connects, and low-pressure end ground connection, chain type discharge loop is formed with variable reactor L1~L10；Described switch K1 one end with
Variable inductance L1~L10 connections, the other end are connected with DC charging power supply, the low-voltage end ground connection of the DC charging power supply；
Described triggered gap one end is connected with variable inductance L1~L10, and the other end is connected with long wave screening test complexes output terminal.
3. direct current arrester long wave screening test device according to claim 1, it is characterised in that the impact fills
Put including switch K2, surge generator, described switch K2 one end is connected with flinging percussion generating apparatus output terminal, the other end and resistance
Piece test product high-pressure side connects.
4. direct current arrester long wave screening test device according to claim 1, it is characterised in that the high direct voltage hair
Generating apparatus includes switch K3, high voltage direct current generator, and described switch K3 one end is connected with high direct voltage generating means output terminal, separately
One end is connected with resistor disc test product high-pressure side.
5. direct current arrester long wave screening test device according to claim 1, it is characterised in that the current collector
Using divertor.
A kind of 6. direct current arrester long wave screening test method using experimental rig described in claim 1, it is characterised in that bag
Include following steps：
Test before step 1, long wave screening, it comprises the following steps：
Step 11, close K3, applies DC voltage to resistor disc test product by high direct voltage generating means, when current collector
When output current value reaches direct-current reference current, by alternating current-direct current divider, the DC reference voltage of resistor disc test product is read, is surveyed
K3 is disconnected after amount；
Step 12, close K2, applies 30/60 μ s surge voltages to resistor disc test product by impacting generating means, works as current acquisition
When the output current value of device reaches operation cooperation electric current, pass through alternating current-direct current divider, read the operation residual voltage of resistor disc test product, survey
K2 is disconnected after amount；
Step 2, long wave screening test, it comprises the following steps：
Step 21, close a switch K1, is charged by DC charging power supply to capacitor C1~C10, adjusts variable inductance L1
The tap of~L10, to obtain the high voltage of different wave length and amplitude, by triggered gap, is applied to resistor disc test product, experiment electricity
Pressure wavelength should be not less than the time specified in equipment code, and resistor disc test product Implantation Energy is design maximum energy；
Step 22, experiment should carry out 6 groups altogether using 3 Secondary Shocks as one group of progress.Each Secondary Shocks interval time is no more than in every group
60s, time interval answers long enough so that resistor disc test product is cooled to environment temperature between every group；
Step 23, by alternating current-direct current divider and current collector, gather voltage and electricity on resistor disc test product in experiment every time
Signal waveform parameter is flowed, and is analyzed and is stored；
Step 24, carry out visual examination to resistor disc test product, if resistor disc test product occurs puncturing or the phenomenon of flashover, judges
Experiment is not by finding the phenomenon of breakdown or flashover such as, carrying out next step experiment；
Tested after step 3, long wave screening, it comprises the following steps：
Step 31, close K3 again, the resistor disc test product after long wave screening test is applied by high direct voltage generating means straight
Galvanic electricity pressure, when the output current value of current collector reaches direct-current reference current, by alternating current-direct current divider, reads long wave sieve
The DC reference voltage of resistor disc test product after choosing experiment, K3 is disconnected after measurement；
Step 32, close K2 again, applies 30/60 μ s to the resistor disc test product after long wave screening test by impacting generating means
Surge voltage, when the output current value of current collector, which reaches operation, coordinates electric current, by alternating current-direct current divider, reads long wave
The operation residual voltage of resistor disc test product after screening test, K2 is disconnected after measurement.
7. direct current arrester long wave screening test method according to claim 6, it is characterised in that the judgement of result of the test
Method：
When meeting following condition for the moment, direct current arrester long wave screening test does not pass through：
Test product occurs puncturing or flashover；
DC reference voltage change rate is more than 5% before and after test product long wave screening test；
Test product long wave screening test forward/backward operation residual voltage change rate is more than 5%.
8. direct current arrester long wave screening test method according to claim 6, it is characterised in that direct current arrester long wave
Screening test is sampling test, and sampling proportion is：
When direct current arrester valve block sum is less than 500, sampling proportion 3%, but sampling number is no less than 10；
When direct current arrester valve block sum is more than or equal to 500, sampling proportion 5%.
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Cited By (6)
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| CN110361640A (en) * | 2019-08-05 | 2019-10-22 | 国网宁夏电力有限公司 | A kind of fusing type arrester group experimental rig |
| CN110618356A (en) * | 2019-08-05 | 2019-12-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Long-time voltage tolerance test device and method for direct current transfer switch lightning arrester |
| CN111722065A (en) * | 2020-05-21 | 2020-09-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch |
| CN111812458A (en) * | 2020-05-21 | 2020-10-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing temporary overvoltage limit tolerance characteristic of lightning arrester of direct current transfer switch |
| CN113960423A (en) * | 2021-10-19 | 2022-01-21 | 广东电网有限责任公司 | Method for evaluating impact energy tolerance capability of valve plate of lightning arrester |
| CN114062810A (en) * | 2021-11-11 | 2022-02-18 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line arrester |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361640A (en) * | 2019-08-05 | 2019-10-22 | 国网宁夏电力有限公司 | A kind of fusing type arrester group experimental rig |
| CN110618356A (en) * | 2019-08-05 | 2019-12-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Long-time voltage tolerance test device and method for direct current transfer switch lightning arrester |
| CN111722065A (en) * | 2020-05-21 | 2020-09-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch |
| CN111812458A (en) * | 2020-05-21 | 2020-10-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing temporary overvoltage limit tolerance characteristic of lightning arrester of direct current transfer switch |
| CN111722065B (en) * | 2020-05-21 | 2021-08-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch |
| CN113960423A (en) * | 2021-10-19 | 2022-01-21 | 广东电网有限责任公司 | Method for evaluating impact energy tolerance capability of valve plate of lightning arrester |
| CN114062810A (en) * | 2021-11-11 | 2022-02-18 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line arrester |
| CN114062810B (en) * | 2021-11-11 | 2023-07-25 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line lightning arrester |
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Application publication date: 20180515 |