CN104502819A - Arrester impact characteristics testing device and method - Google Patents
Arrester impact characteristics testing device and method Download PDFInfo
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- CN104502819A CN104502819A CN201410826691.0A CN201410826691A CN104502819A CN 104502819 A CN104502819 A CN 104502819A CN 201410826691 A CN201410826691 A CN 201410826691A CN 104502819 A CN104502819 A CN 104502819A
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Abstract
The invention discloses an arrester impact characteristic testing device and method. The arrester impact characteristic testing method includes steps of boosting a working frequency power supply through a transformer, charging capacitors by a high-voltage silicon stack and a charging resistor in parallel connection, discharging from sphere gaps, parallelly connecting the capacitors to generate high voltage and high current and applying to a test product. The arrester impact characteristic testing device and method solves the problems of measuring of lightning and operating impact characteristic of an integral arrester and current distribution of multiple arresters in parallel connection, solves the problem that a same testing device can generate four kinds of standard wave forms including lightning impact voltage waves, operating impact voltage waves, lightning impact current waves and operating impact current waves, is used for measuring and storing various impact voltage and current wave parameters and provides powerful testing data and guarantee for reliable operation of the arrester.
Description
Technical field
The present invention relates to test of lightning arrester, particularly a kind of lightning arrester impact characteristics test unit and test method.
Background technology
Lightning arrester is the important protective device of electric system; widespread use in electric system; lightning arrester impact characteristics decides the level of protection of lightning arrester, the measurement of lightning arrester impact characteristics parameter and research to lightning arrester and parameters of electric power system coordinate and protection is very important.The test of lightning arrester impact characteristics is measure on the proportional unit of lightning arrester at present, and be multiplied by scale-up factor to obtain the impact characteristics of whole lightning arrester, its degree of accuracy measuring the impact characteristics of lightning arrester is not high, needs to overlap test unit for surge voltage and dash current attribute testing more.
Summary of the invention
The object of the invention is to solve the problem, a kind of lightning arrester impact characteristics test unit and test method are provided.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
A kind of lightning arrester impact characteristics test unit, comprises transformer, high voltage silicon rectifier stack and the surge voltage of being struck by lightning for generation of simulation and operating of one or more groups series connection or the test unit unit of dash current; Power frequency supply, after transformer boost, is charged to test unit unit by high voltage silicon rectifier stack; During test unit cell discharge, by harmonic inductance, surge voltage or dash current are applied on test product.
Each group test unit unit comprises 2 charging resistors, 2 capacitors, 1 ball gap, 1 wave head impedance and 1 wave rear impedance; The high-pressure side of transformer is connected on the charging end of two capacitors respectively by high voltage silicon rectifier stack and 2 charging resistors, and the low pressure end of one of them capacitor is connected with the high-pressure side of wave head impedance, and the low pressure end of wave head impedance is connected with the low pressure end of transformer, and ground connection; The low pressure end of another capacitor is connected on the high-pressure side of wave rear impedance, and the low pressure end of wave rear impedance is connected with the high-pressure side of wave head impedance; The charging end of two capacitors is connected by ball gap.
The charging end of two capacitors of last group of test unit unit is connected with two charging resistors of rear battery of tests device unit respectively, and the high-pressure side of the wave rear impedance of last group of test unit unit is connected with the low pressure end of the wave head impedance of rear battery of tests device unit; Surge voltage and dash current as output terminal, and are applied on test product by harmonic inductance by the high-pressure side of the wave rear impedance of last group test unit unit.
When producing surge voltage ripple, wave head impedance adopts resistance; When producing dash current ripple, wave head impedance adopts inductance.
Produce switching impulse current ripple time, harmonic inductance is connected on test unit, produce other shock wave time with plain conductor by the short circuit of harmonic inductance.
Described test product is in series with shunt, shunt is connected with the first measuring unit for measuring current waveform by test product and amplitude; The two ends of test product are parallel with the second voltage divider, the second voltage divider are connected with the second measuring unit for measuring voltage waveform and the amplitude being applied to test product two ends; Being connected to first voltage divider between the charging end of two capacitors of first group of test unit unit and ground, two first voltage dividers being connected with the 3rd measuring unit of charging voltage waveform for measuring capacitor and amplitude; The two ends of test product are also parallel with the load capacitor for improving test unit efficiency when operating impulse voltage is tested.
Described test product is 1 or many lightning arresters in parallel, and shunt adopts divertor or current mutual inductor coil, and number is corresponding with lightning arrester number.
Described first voltage divider adopts resitstance voltage divider; Second voltage divider adopts RC divider when measuring surge voltage ripple, adopts steep wave voltage divider when measurement test product passes through the residual voltage of dash current ripple.
Described first measuring unit, the second measuring unit and the 3rd measuring unit all adopt capture card to gather the voltage waveform of the second voltage divider and the first voltage divider and the current waveform of shunt, and analysis and calculation is carried out to current waveform, determine the current distribution factor of each lightning arrester connected in parallel; First measuring unit, the second measuring unit and the 3rd measuring unit are also provided with the interface providing communication to host computer.
Adopt a lightning arrester impact characteristics test method for test unit described in claim, comprise the following steps:
1) first close power frequency supply, power frequency supply, through transformer boost, by high voltage silicon rectifier stack and charging resistor to capacitor charged in parallel, controls charging voltage by the first voltage divider and the 3rd measuring unit;
2) then by controlling ball-gap discharge, making capacitor electrically upper series connection, producing high voltage and big current, be applied on test product;
3) obtain by the parameter of adjustment wave head impedance, wave rear impedance and harmonic inductance the lightning impulse voltage ripple be applied on test product, operating impulse voltage ripple, lightning impulse current involve switching impulse current ripple;
4) the first measuring unit gathers current waveform and the amplitude of each shunt respectively, by carrying out analyzing and storing in test product current waveform parameter acquisition to computing machine; For many lightning arresters in parallel, the distribution of current of each test product in parallel under different current wave can be obtained; Second measuring unit gathers voltage waveform and the amplitude of the second voltage divider;
5) the first measuring unit, the second measuring unit and the 3rd measuring unit are transferred in host computer by the voltage of test product, current waveform parameter and result of calculation gathering by the mode of communication cable, optical fiber or wireless telecommunications.
Compared with prior art, the present invention has following beneficial effect:
The present invention, by multiple test unit units in series, produces high surge voltage and dash current; The waveform being applied to different surge voltage on test product and dash current is obtained by the parameter of adjustment wave head impedance, wave rear impedance and harmonic inductance.Achieve and at same set of test unit, whole lightning arrester thunder and lightning and switching impulse characteristic are measured, and the measurement of the distribution of current of many lightning arrester connected in parallel.The invention solves whole lightning arrester thunder and lightning and the measurement problem of switching impulse characteristic, the distribution of current measurement problem to many lightning arrester connected in parallel, at 4 kinds of reference waveforms that same set of test unit can produce lightning impulse voltage ripple, operating impulse voltage ripple, lightning impulse current involve switching impulse current ripple, and the measurement of various surge voltage and current waveform parameter and storage, the reliability service for lightning arrester provides strong test figure and guarantee.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
In figure: 1 for comprising transformer; 2 is high voltage silicon rectifier stack; 3 is the first voltage divider; 4 is charging resistor; 5 is capacitor; 6 is wave head impedance; 7 is wave rear impedance; 8 is ball gap; 9 is harmonic inductance; 10 is load capacitor; 11 is the second voltage divider; 12 is test product; 13 is shunt; 14 is the first measuring unit; 15 is the second measuring unit; 16 is the 3rd measuring unit; 17 is test unit unit.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail:
See Fig. 1 test unit of the present invention, comprise transformer 1, high voltage silicon rectifier stack 2, first voltage divider 3, charging resistor 4, capacitor 5, wave head impedance 6, wave rear impedance 7, ball gap 8, harmonic inductance 9, load capacitor 10, second voltage divider 11, test product 12, shunt 13, first measuring unit 14, second measuring unit 15, the 3rd measuring unit 16, test unit unit 17.
Power frequency supply boosts through transformer 1, by high voltage silicon rectifier stack 2 and charging resistor 4 pairs of capacitor 5 charged in parallels, discharged by ball gap 8, capacitor 5 is connected, produce high voltage and big current, be applied on test product 12, obtained the waveform being applied to different surge voltage on test product 12 and dash current by the parameter of adjustment wave head impedance 6, wave rear impedance 7 and harmonic inductance 9; The parameter of adjustment wave head impedance 6, wave rear impedance 7 and harmonic inductance 9, can produce lightning impulse voltage ripple, operating impulse voltage ripple, lightning impulse current involve switching impulse current ripple.Wave head impedance 7, when producing standard impulse voltage wave, wave head impedance 7 adopts resistance; When producing dash current ripple, wave head impedance 7 adopts inductance.Harmonic inductance 9, when producing switching impulse current ripple, is connected on test unit, when producing other shock wave, with plain conductor by harmonic inductance 9 short circuit.The efficiency of test unit when load capacitor 10 is used to improve operating impulse voltage test; First measuring unit 14 utilizes capture card, gather current waveform and the amplitude of each shunt 13 respectively, by carrying out analyzing and storing in test product 12 current waveform parameter acquisition to computing machine, to many lightning arresters in parallel, the distribution of current of each test product in parallel under different current wave can be obtained; Shunt 13 adopts divertor or current mutual inductor coil.Test product 12 is 1 ~ 8 lightning arrester.Second measuring unit 15 utilizes capture card, gathers voltage waveform and the amplitude of the second voltage divider 11, the second voltage divider 11, adopts RC divider during measurement standard surge voltage ripple, measures when test product 12 passes through the residual voltage of dash current ripple and adopts steep wave voltage divider.3rd measuring unit 16 utilizes capture card, and gather voltage waveform and the amplitude of the first voltage divider 3, the first voltage divider 3 adopts resitstance voltage divider.Second measuring unit 15 and the 3rd measuring unit 16 comprise capture card, utilize capture card to gather the voltage waveform of the second voltage divider 11 and the first voltage divider 3 respectively.First measuring unit 14 comprises capture card, utilizes capture card to gather the current waveform of shunt 13 respectively, and carries out analysis and calculation, determine the current distribution factor of each lightning arrester connected in parallel.First measuring unit 14, second measuring unit 15 and the 3rd measuring unit 16 are provided with the interface providing communication to host computer.
Test unit unit 17 is made up of 2 charging resistors, 4,2 capacitors, 5,1 wave front resistance, 6,1 wave terminal resistance, 7,1 ball gap 8.Test unit can be connected by 1 ~ 40 test unit unit 17, produces surge voltage and 0.1kA ~ 40kA dash current of 200kV ~ 8000kV.
The present invention first voltage divider 3 is connected between the high-pressure side of capacitor and ground, is used for measuring the charging voltage of capacitor; Ball gap 8 is discharged, and capacitor 5 is connected, and produces high voltage and big current, is applied on test product 12, is obtained the waveform being applied to different surge voltage on test product 12 and dash current by the parameter of adjustment wave head impedance 6, wave rear impedance 7 and harmonic inductance 9; Test product 12 is parallel with the second voltage divider 11, is used for measuring the voltage of test product; Test product 12 is in series with shunt 13, is used for measuring the electric current of test product; It is in parallel that test product 12 also can be multiple lightning arrester, and each lightning arrester connected in parallel is in series with shunt 13.
Test method of the present invention is as follows:
When testing, first close power frequency supply, power frequency supply boosts through transformer 1, by high voltage silicon rectifier stack 2 and charging resistor 4 pairs of capacitor 5 charged in parallels, controls charging voltage by the first voltage divider 3 and the 3rd measuring unit 16.Then discharging by controlling ball gap 8, capacitor 5 being connected, produces high voltage and big current, be applied on test product 12.The waveform being applied to different surge voltage on test product 12 and dash current is obtained, the efficiency of test unit when load capacitor 10 is used to improve operating impulse voltage test by the parameter of adjustment wave head impedance 6, wave rear impedance 7 and harmonic inductance 9.First measuring unit 14 utilizes capture card, gather current waveform and the amplitude of each shunt 13 respectively, by carrying out analyzing and storing in test product 12 current waveform parameter acquisition to computing machine, to many lightning arresters in parallel, the distribution of current of each test product in parallel under different current wave can be obtained.Second measuring unit 15 utilizes capture card, gathers voltage waveform and the amplitude of the second voltage divider 11.
Further, when producing standard impulse voltage wave, wave head impedance 7 adopts resistance, and when producing dash current ripple, wave head impedance 7 adopts inductance; When producing switching impulse current ripple, harmonic inductance 9 is connected on test unit; First voltage divider 3 adopts resitstance voltage divider; Described second voltage divider 11, adopts RC divider during measurement standard surge voltage ripple, measures when test product 12 passes through the residual voltage of dash current ripple and adopts steep wave voltage divider; Shunt 13 adopts divertor or current mutual inductor coil; First measuring unit 14, second measuring unit 15 and the 3rd measuring unit 16 are provided with the interface providing communication to host computer, are transferred in host computer gathering by communication cable, optical fiber and wireless telecommunications by the voltage of test product 12, current waveform parameter and result of calculation.
Above content is only and technological thought of the present invention is described; protection scope of the present invention can not be limited with this; every technological thought proposed according to the present invention, any change that technical scheme basis is done, within the protection domain all falling into claims of the present invention.
Claims (10)
1. a lightning arrester impact characteristics test unit, is characterized in that: comprise transformer (1), high voltage silicon rectifier stack (2) and one or more groups test unit unit (17) for generation of the surge voltage or dash current of simulating thunderbolt of connecting; Power frequency supply, after transformer (1) boosting, is charged to test unit unit (17) by high voltage silicon rectifier stack (2); During test unit unit (17) electric discharge, by harmonic inductance (9), surge voltage or dash current are applied on test product (12).
2. lightning arrester impact characteristics test unit according to claim 1, is characterized in that: each group test unit unit (17) comprises 2 charging resistors (4), 2 capacitors (5), 1 ball gap (8), 1 wave head impedance (6) and 1 wave rear impedance (7); The high-pressure side of transformer (1) is connected on the charging end of two capacitors (5) respectively by high voltage silicon rectifier stack (2) and 2 charging resistors (4), the low pressure end of one of them capacitor (5) is connected with the high-pressure side of wave head impedance (6), the low pressure end of wave head impedance (6) is connected with the low pressure end of transformer (1), and ground connection; The low pressure end of another capacitor (5) is connected on the high-pressure side of wave rear impedance (7), and the low pressure end of wave rear impedance (7) is connected with the high-pressure side of wave head impedance (6); The charging end of two capacitors (5) is connected by ball gap (8).
3. lightning arrester impact characteristics test unit according to claim 2, it is characterized in that: the charging end of two capacitors (5) of last group of test unit unit (17) is connected with two charging resistors of rear battery of tests device unit (17) respectively, and the high-pressure side of the wave rear impedance (7) of last group of test unit unit (17) is connected with the low pressure end of the wave head impedance (6) of rear battery of tests device unit; Surge voltage and dash current as output terminal, and are applied on test product (12) by harmonic inductance (9) by the high-pressure side of the wave rear impedance (7) of last group test unit unit (17).
4. the lightning arrester impact characteristics test unit according to Claims 2 or 3, is characterized in that: when producing surge voltage ripple, and wave head impedance (7) adopts resistance; When producing dash current ripple, wave head impedance (7) adopts inductance.
5. the lightning arrester impact characteristics test unit according to claim 1 or 2 or 3, it is characterized in that: when producing switching impulse current ripple, harmonic inductance (9) is connected on test unit, produce other shock wave time with plain conductor by harmonic inductance (9) short circuit.
6. the lightning arrester impact characteristics test unit according to Claims 2 or 3, it is characterized in that: described test product (12) is in series with shunt (13), shunt (13) being connected with for measuring by the current waveform of test product (12) and first measuring unit (14) of amplitude; The two ends of test product (12) are parallel with the second voltage divider (11), the second voltage divider (11) is connected with and is applied to the voltage waveform at test product (12) two ends and second measuring unit (14) of amplitude for measuring; Being connected to first voltage divider (3) between the charging end of two capacitors (5) of first group of test unit unit (17) and ground, two first voltage dividers (3) being connected with the 3rd measuring unit (16) of charging voltage waveform for measuring capacitor and amplitude; The two ends of test product (12) are also parallel with the load capacitor for improving test unit efficiency when operating impulse voltage is tested.
7. lightning arrester impact characteristics test unit according to claim 6, it is characterized in that: described test product (12) is 1 or many lightning arresters in parallel, shunt (13) adopts divertor or current mutual inductor coil, and number is corresponding with lightning arrester number.
8. lightning arrester impact characteristics test unit according to claim 6, is characterized in that: described first voltage divider (3) adopts resitstance voltage divider; Second voltage divider (11) adopts RC divider when measuring surge voltage ripple, adopts steep wave voltage divider when measuring test product (12) residual voltage by dash current ripple.
9. lightning arrester impact characteristics test unit according to claim 6, it is characterized in that: described first measuring unit (14), the second measuring unit (15) and the 3rd measuring unit (16) all adopt capture card to gather the voltage waveform of the second voltage divider (11) and the first voltage divider (16) and the current waveform of shunt (13), and analysis and calculation is carried out to current waveform, determine the current distribution factor of each lightning arrester connected in parallel; First measuring unit (14), the second measuring unit (15) and the 3rd measuring unit (16) are also provided with the interface providing communication to host computer.
10. adopt a lightning arrester impact characteristics test method for test unit described in claim 6, it is characterized in that, comprise the following steps:
1) first power frequency supply is closed, power frequency supply boosts through transformer (1), by high voltage silicon rectifier stack (2) and charging resistor (4) to capacitor (5) charged in parallel, control charging voltage by the first voltage divider (3) and the 3rd measuring unit (16);
2) then by controlling ball gap (8) electric discharge, making capacitor (5) electrically upper series connection, producing high voltage and big current, be applied on test product (12);
3) obtain by the parameter of adjustment wave head impedance (6), wave rear impedance (7) and harmonic inductance (9) the lightning impulse voltage ripple be applied on test product (12), operating impulse voltage ripple, lightning impulse current involve switching impulse current ripple;
4) the first measuring unit (14) gathers current waveform and the amplitude of each shunt (13) respectively, carries out analyzing and storing by test product (12) current waveform parameter acquisition to computing machine; For many lightning arresters in parallel, the distribution of current of each test product in parallel under different current wave can be obtained; Second measuring unit (15) gathers voltage waveform and the amplitude of the second voltage divider (11);
5) the first measuring unit (14), the second measuring unit (15) and the 3rd measuring unit (16) are transferred in host computer by the voltage of test product (12), current waveform parameter and result of calculation gathering by the mode of communication cable, optical fiber or wireless telecommunications.
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| CN112572828A (en) * | 2019-09-28 | 2021-03-30 | 苏州电器科学研究院股份有限公司 | Movable aircraft lightning test system |
| CN112904116A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | System and method for evaluating dynamic characteristics of valve plate of lightning arrester under action of impact current |
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
| CN113608031B (en) * | 2021-08-04 | 2024-02-02 | 北京英瑞来科技有限公司 | Impact impedance monitoring method and device for substation lightning arrester |
| CN114509635A (en) * | 2022-04-18 | 2022-05-17 | 合肥航太电物理技术有限公司 | Novel strong current continuous wave generating device for airplane lightning test |
| CN114509635B (en) * | 2022-04-18 | 2022-07-05 | 合肥航太电物理技术有限公司 | Airplane lightning test strong current continuous wave generating device |
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