CN104502819B - Arrester impact characteristics testing device and method - Google Patents

Arrester impact characteristics testing device and method Download PDF

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Publication number
CN104502819B
CN104502819B CN201410826691.0A CN201410826691A CN104502819B CN 104502819 B CN104502819 B CN 104502819B CN 201410826691 A CN201410826691 A CN 201410826691A CN 104502819 B CN104502819 B CN 104502819B
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China
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current
voltage
divider
experimental rig
test
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CN201410826691.0A
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Chinese (zh)
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CN104502819A (en
Inventor
何计谋
苗发金
祝嘉喜
李小社
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中国西电电气股份有限公司
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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

A kind of arrester impact characteristics experimental rig and test method
Technical field
The present invention relates to test of lightning arrester, more particularly to a kind of arrester impact characteristics experimental rig and test method.
Background technology
Arrester is the important protection electrical equipment of power system, is extensively applied in power system, arrester impact characteristics The level of protection of arrester is decide, the measurement and research of arrester impact characteristics parameter is to arrester and parameters of electric power system Coordinate and protection is very important.The test of arrester impact characteristics is currently to measure on the proportional unit of arrester, and It is multiplied by proportionality coefficient to obtain the impact characteristics of whole arrester, the accuracy of the impact characteristics of its measurement arrester is not high, right Many set experimental rigs are needed in surge voltage and dash current attribute testing.
The content of the invention
It is an object of the invention to solve the above problems, there is provided a kind of arrester impact characteristics experimental rig and test side Method.
In order to achieve the above object, the present invention is employed the following technical solutions and is achieved:
A kind of arrester impact characteristics experimental rig, including the use of transformer, high voltage silicon rectifier stack and one or more groups of series connection In the experimental rig unit of the surge voltage or dash current for producing simulation thunderbolt and operating;Power frequency supply Jing transformer boosts Afterwards, experimental rig unit is charged by high voltage silicon rectifier stack;During experimental rig cell discharge, electricity will be impacted by harmonic inductance Pressure or dash current are applied on test product.
Each group of experimental rig unit includes 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, The low-pressure end of one of capacitor is connected with the high-pressure side of wave head impedance, the low-pressure end of wave head impedance and the low-pressure end of transformer It is connected, and is grounded;The low-pressure end of another capacitor is connected on the high-pressure side of wave rear impedance, the low-pressure end and ripple of wave rear impedance The high-pressure side of head impedance is connected;The charging end of two capacitors is connected by ball gap.
The charging end of two capacitors of previous group experimental rig unit respectively with two chargings of later group experimental rig unit Resistance is connected, the high-pressure side of the wave rear impedance of previous group experimental rig unit and the wave head impedance of later group experimental rig unit Low-pressure end is connected;The high-pressure side of the wave rear impedance of last group of experimental rig unit is incited somebody to action as output end by harmonic inductance Surge voltage and dash current are applied on test product.
When surge voltage ripple is produced, wave head impedance adopts resistance;When dash current ripple is produced, wave head impedance is using electricity Sense.
When switching impulse current ripple is produced, harmonic inductance connection is used on experimental rig when other shock waves are produced Plain conductor is short-circuit by harmonic inductance.
The test product is in series with current divider, is connected with current divider for measurement by the current waveform of test product and amplitude First measuring unit;The two ends of test product are parallel with the second divider, are connected with the second divider and are applied to test product for measurement The voltage waveform at two ends and the second measuring unit of amplitude;The charging end of two capacitors of first group of experimental rig unit and ground Between be connected to first divider, be connected with two first divider for measure capacitor charging voltage waveform and 3rd measuring unit of amplitude;The two ends of test product are also parallel with for improving experimental rig efficiency when operating impulse voltage is tested Load capacitor.
The test product is the arrester of 1 or many parallel connection, and current divider adopts divertor or current mutual inductor coil, And number is corresponding with arrester number.
First divider adopts resitstance voltage divider;Second divider adopts resistive-capacitive voltage divider when surge voltage ripple is measured Device, measuring when test product passes through the residual voltage of dash current ripple steep wave divider is adopted.
First measuring unit, the second measuring unit and the 3rd measuring unit gather the second partial pressure using capture card The current waveform of the voltage waveform and current divider of device and the first divider, and current waveform is analyzed and is calculated, it is determined that The current distribution factor of each lightning arrester connected in parallel;It is additionally provided with first measuring unit, the second measuring unit and the 3rd measuring unit The interface of communication is provided to host computer.
A kind of arrester impact characteristics test method of experimental rig described in employing claim, comprises the following steps:
1) first close power frequency supply, power frequency supply Jing transformer boosts, by high voltage silicon rectifier stack and charging resistor to capacitor simultaneously Connection charges, and by the first divider and the 3rd measuring unit charging voltage is controlled;
2) and then by controlling ball-gap discharge so that capacitor is electrically connected, high voltage and high current are produced, is applied to On test product;
3) thunder and lightning being applied on test product punching is obtained by adjusting the parameter of wave head impedance, wave rear impedance and harmonic inductance Hit voltage wave, operating impulse voltage ripple, lightning impulse current and involve switching impulse current ripple;
4) the first measuring unit gathers respectively the current waveform and amplitude of each current divider, by test product current waveform parameter Collect and be analyzed in computer and store;For the arrester of many parallel connections, each test product in parallel can be obtained in different electricity CURRENT DISTRIBUTION under stream ripple;Second measuring unit gathers the voltage waveform and amplitude of the second divider;
5) the first measuring unit, the second measuring unit and the 3rd measuring unit pass through communication cable, optical fiber or wireless telecommunications Mode collection is transferred in host computer by the voltage of test product, current waveform parameter and result of calculation.
Compared with prior art, the invention has the advantages that:
The present invention is by the series connection of multiple experimental rig units, the high surge voltage of generation and dash current;By adjusting wave head The parameter of impedance, wave rear impedance and harmonic inductance is obtaining the ripple of the different surge voltages and dash current being applied on test product Shape.Realize whole arrester thunder and lightning and switching impulse characteristic are measured in same set of experimental rig, and many parallel connections The measurement of the CURRENT DISTRIBUTION of arrester.The present invention solve the problems, such as measurement to whole arrester thunder and lightning and switching impulse characteristic, CURRENT DISTRIBUTION measurement problem to many lightning arrester connected in parallel, in same set of experimental rig lightning impulse voltage ripple, behaviour can be produced Make 4 kinds of reference waveforms that surge voltage ripple, lightning impulse current involve switching impulse current ripple, and various surge voltages and electricity The measurement and storage of stream waveform parameter, the reliability service for arrester provides strong test data and guarantee.
Description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
In figure:1 is to include transformer;2 is high voltage silicon rectifier stack;3 is the first divider;4 is charging resistor;5 is capacitor;6 For wave head impedance;7 is wave rear impedance;8 is ball gap;9 is harmonic inductance;10 is load capacitor;11 is the second divider;12 are Test product;13 is current divider;14 is the first measuring unit;15 is the second measuring unit;16 is the 3rd measuring unit;17 are test dress Put unit.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention will be further described in detail:
Referring to Fig. 1 experimental rigs of the present invention, including transformer 1, high voltage silicon rectifier stack 2, the first divider 3, charging resistor 4, electricity Container 5, wave head impedance 6, wave rear impedance 7, ball gap 8, harmonic inductance 9, load capacitor 10, the second divider 11, test product 12, point Stream device 13, the first measuring unit 14, the second measuring unit 15, the 3rd measuring unit 16, experimental rig unit 17.
Power frequency supply Jing transformers 1 boost, by high voltage silicon rectifier stack 2 and charging resistor 4 to the charged in parallel of capacitor 5, by ball Gap 8 is discharged so that capacitor 5 is connected, and produces high voltage and high current, is applied on test product 12, by adjust wave head impedance 6, The parameter of wave rear impedance 7 and harmonic inductance 9 is obtaining the ripple of the different surge voltages and dash current being applied on test product 12 Shape;Adjustment wave head impedance 6, wave rear impedance 7 and the parameter of harmonic inductance 9, can produce lightning impulse voltage ripple, switching impulse Voltage wave, lightning impulse current involve switching impulse current ripple.Wave head impedance 7, when standard impulse voltage wave is produced, wave head resistance Anti- 7 adopt resistance;When dash current ripple is produced, wave head impedance 7 adopts inductance.Harmonic inductance 9, is producing switching impulse current During ripple, it is connected on experimental rig, it is with plain conductor that harmonic inductance 9 is short-circuit when other shock waves are produced.Load capacitor 10 is the efficiency for improving experimental rig when operating impulse voltage is tested;First measuring unit 14 utilizes capture card, adopts respectively Collect the current waveform and amplitude of each current divider 13, being analyzed in computer by the current waveform parameter acquisition of test product 12 and Storage, the arrester to many parallel connections is obtained CURRENT DISTRIBUTION of each test product in parallel under different current waves;Current divider 13 is adopted Divertor or current mutual inductor coil.Test product 12, is 1~8 arrester.Second measuring unit 15 utilizes capture card, adopts Collect the voltage waveform and amplitude of the second divider 11, the second divider 11 adopts resistive-capacitive voltage divider during measurement standard surge voltage ripple Device, measures test product 12 and passes through to adopt steep wave divider during the residual voltage of dash current ripple.3rd measuring unit 16 utilizes capture card, adopts Collect the voltage waveform and amplitude of the first divider 3, the first divider 3 adopts resitstance voltage divider.Second measuring unit 15 and the 3rd Measuring unit 16 includes capture card, and using capture card the voltage waveform of the second divider 11 and the first divider 3 is gathered respectively.The One measuring unit 14 includes capture card, and using capture card the current waveform of current divider 13 is gathered respectively, and is analyzed and calculates, 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 It is provided with the interface that communication is provided to host computer.
Experimental rig unit 17 is by 25,1, capacitor wave terminal resistances 7,1 of wave front resistance 6,1 of charging resistor 4,2 Ball gap 8 is constituted.Experimental rig can be connected by 1~40 experimental rig unit 17, produce 200kV~8000kV surge voltage and 0.1kA~40kA dash currents.
First divider 3 of the invention is connected between the high-pressure side of capacitor and ground, for measuring the charging voltage of capacitor; Ball gap 8 is discharged so that capacitor 5 is connected, and produces high voltage and high current, is applied on test product 12, by adjusting wave head impedance 6th, the parameter of wave rear impedance 7 and harmonic inductance 9 is obtaining the different surge voltage that is applied on test product 12 and dash current Waveform;Test product 12 is parallel with the second divider 11, for measuring the voltage of test product;Test product 12 is in series with current divider 13, for surveying The electric current of amount test product;Test product 12 is alternatively multiple arresters parallel connections, and each lightning arrester connected in parallel is in series with current divider 13.
Test method of the present invention is as follows:
When being tested, power frequency supply is first closed, power frequency supply Jing transformers 1 boost, by high voltage silicon rectifier stack 2 and charging resistor 4 pairs of charged in parallels of capacitor 5, by the first divider 3 and the 3rd measuring unit 16 charging voltage is controlled.Then control ball is passed through Gap 8 is discharged so that capacitor 5 is connected, and produces high voltage and high current, is applied on test product 12.By adjust wave head impedance 6, The parameter of wave rear impedance 7 and harmonic inductance 9 is obtaining the ripple of the different surge voltages and dash current being applied on test product 12 Shape, load capacitor 10 is the efficiency for improving experimental rig when operating impulse voltage is tested.First measuring unit 14 is utilized Capture card, gathers respectively the current waveform and amplitude of each current divider 13, by the current waveform parameter acquisition of test product 12 to calculating It is analyzed in machine and stores, the arrester to many parallel connections is obtained electric current of each test product in parallel under different current waves point Cloth.Second measuring unit 15 utilizes capture card, gathers the voltage waveform and amplitude of the second divider 11.
Further, when standard impulse voltage wave is produced, wave head impedance 7 adopts resistance, when dash current ripple is produced, ripple Head impedance 7 adopts inductance;When switching impulse current ripple is produced, harmonic inductance 9 is connected on experimental rig;First divider 3 adopt resitstance voltage divider;Second divider 11, adopts RC divider during measurement standard surge voltage ripple, measure test product 12 by adopting steep wave divider during the residual voltage of dash current ripple;Current divider 13 is using divertor or current transformer line Circle;First measuring unit 14, the second measuring unit 15 and the 3rd measuring unit 16 are provided with to host computer and provide communication Interface, by communication cable, optical fiber and wireless telecommunications collection by the voltage of test product 12, current waveform parameter and result of calculation In being transferred to host computer.
Above content technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every to press According to technological thought proposed by the present invention, any change done on the basis of technical scheme, claims of the present invention is each fallen within Protection domain within.

Claims (9)

1. a kind of arrester impact characteristics experimental rig, it is characterised in that:Including transformer (1), high voltage silicon rectifier stack (2) and one group Or the surge voltage for producing simulation thunderbolt or the experimental rig unit (17) of dash current of multigroup series connection;Power frequency supply Jing After transformer (1) boosting, experimental rig unit (17) is charged by high voltage silicon rectifier stack (2);Experimental rig unit (17) is put When electric, surge voltage or dash current are applied on test product (12) by harmonic inductance (9);
Each group of experimental rig unit (17) includes 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 respectively by high voltage silicon rectifier stack (2) and 2 charging resistors (4) It is connected on the charging end of two capacitors (5), the low-pressure end of one of capacitor (5) and the high-pressure side phase of wave head impedance (6) Even, the low-pressure end of wave head impedance (6) is connected with the low-pressure end of transformer (1), and is grounded;The low-pressure end of another capacitor (5) It is connected on the high-pressure side of wave rear impedance (7), the low-pressure end of wave rear impedance (7) is connected with the high-pressure side of wave head impedance (6);Two is electric The charging end of container (5) is connected by ball gap (8).
2. arrester impact characteristics experimental rig according to claim 1, it is characterised in that:Previous group experimental rig unit (17) charging end of two capacitors (5) is connected respectively with two charging resistors of later group experimental rig unit (17), previous group The high-pressure side of the wave rear impedance (7) of experimental rig unit (17) and the low pressure of the wave head impedance (6) of later group experimental rig unit End is connected;The high-pressure side of the wave rear impedance (7) of last group of experimental rig unit (17) as output end, and by harmonic inductance (9) surge voltage or dash current are applied on test product (12).
3. arrester impact characteristics experimental rig according to claim 1 and 2, it is characterised in that:Producing surge voltage During ripple, wave head impedance (6) adopts resistance;When dash current ripple is produced, wave head impedance (6) adopts inductance.
4. arrester impact characteristics experimental rig according to claim 1 and 2, it is characterised in that:Producing switching impulse During current wave, harmonic inductance (9) is connected on experimental rig, when other shock waves are produced with plain conductor by harmonic inductance (9) short circuit.
5. arrester impact characteristics experimental rig according to claim 1 and 2, it is characterised in that:Test product (12) string Current divider (13) is associated with, is connected with current divider (13) for measurement by the current waveform of test product (12) and the first survey of amplitude Amount unit (14);The two ends of test product (12) are parallel with the second divider (11), and the second divider is connected with for measuring on (11) It is applied to the voltage waveform at test product (12) two ends and second measuring unit (15) of amplitude;First group of experimental rig unit (17) First divider (3) is connected between the charging end and ground of two capacitors (5), is connected on two first divider (3) There is 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 For improving the load capacitor of experimental rig efficiency when operating impulse voltage is tested.
6. arrester impact characteristics experimental rig according to claim 5, it is characterised in that:The test product (12) is 1 Or the arrester of many parallel connections, current divider (13) is using divertor or current mutual inductor coil, and number and arrester are individual Number is corresponding.
7. arrester impact characteristics experimental rig according to claim 5, it is characterised in that:First divider (3) Using resitstance voltage divider;Second divider (11) adopts RC divider when surge voltage ripple is measured, in measurement test product (12) By adopting steep wave divider during the residual voltage of dash current ripple.
8. arrester impact characteristics experimental rig according to claim 5, it is characterised in that:First measuring unit (14) current waveform of current divider (13) is gathered using capture card, the second measuring unit (15) gathers the second partial pressure using capture card The voltage waveform of device (11), the 3rd measuring unit (16) gathers the voltage waveform of the first divider (3), capture card using capture card Current waveform is analyzed and is calculated, determine the current distribution factor of each lightning arrester connected in parallel;First measuring unit (14), second The interface that communication is provided to host computer is additionally provided with measuring unit (15) and the 3rd measuring unit (16).
9. the arrester impact characteristics test method of experimental rig described in a kind of employing claim 5, it is characterised in that include with Lower step:
1) power frequency supply, power frequency supply Jing transformers (1) boosting, by high voltage silicon rectifier stack (2) and charging resistor (4) to electric capacity are first closed Device (5) charged in parallel, by the first divider (3) and the 3rd measuring unit (16) charging voltage is controlled;
2) and then by control ball gap (8) discharge so that capacitor (5) is electrically connected, produce high voltage and high current, apply To on test product (12);
3) it is applied to test product (12) to obtain by adjusting the parameter of wave head impedance (6), wave rear impedance (7) and harmonic inductance (9) On lightning impulse voltage ripple, operating impulse voltage ripple, lightning impulse current involve switching impulse current ripple;
4) the first measuring unit (14) gathers respectively the current waveform and amplitude of each current divider (13), by test product (12) electric current Waveform parameter collects and be analyzed in computer and store;For the arrester of many parallel connections, each test product in parallel can be obtained CURRENT DISTRIBUTION under different current waves;Second measuring unit (15) gathers the voltage waveform and amplitude of the second divider (11);
5) the first measuring unit (14), the second measuring unit (15) and the 3rd measuring unit (16) by communication cable, optical fiber or The mode of wireless telecommunications is transferred to host computer collection by the voltage of test product (12), current waveform parameter and result of calculation In.
CN201410826691.0A 2014-12-25 2014-12-25 Arrester impact characteristics testing device and method CN104502819B (en)

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CN105510753B (en) * 2016-01-08 2018-08-31 国家电网公司 A kind of 100kA thunder and lightning flow-generators for the test of earthing or grounding means impact characteristics
CN106646163B (en) * 2016-12-22 2019-07-02 中国西电电气股份有限公司 For condenser type compound insulated bus system lightning impulse test circuit and method
CN108037399B (en) * 2018-02-07 2020-10-02 国网湖北省电力有限公司电力科学研究院 35kV lightning arrester power frequency follow current interruption capability testing device and method
CN108107300A (en) * 2018-02-27 2018-06-01 南方电网科学研究院有限责任公司 Arrester checks circuit and device
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