CN106646173B - It is a kind of suitable for the power capacitor discharge test circuit of multi-parameter and method - Google Patents
It is a kind of suitable for the power capacitor discharge test circuit of multi-parameter and method Download PDFInfo
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- CN106646173B CN106646173B CN201611199487.6A CN201611199487A CN106646173B CN 106646173 B CN106646173 B CN 106646173B CN 201611199487 A CN201611199487 A CN 201611199487A CN 106646173 B CN106646173 B CN 106646173B
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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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
The present invention provides a kind of suitable for the power capacitor discharge test circuit of multi-parameter and method, including DC power supply, REgulatable reactor, adjustable resistor, discharge ball gap, circuit reconfiguration switch, measuring device and control system；DC power supply, discharge ball gap, adjustable resistor and the REgulatable reactor successively connects to form major loop along current direction, the low-pressure end ground connection of DC power supply；The circuit reconfiguration switchs the high-voltage end of one end connection discharge ball gap, and the other end connects the low-pressure end of REgulatable reactor；When test, test product capacitor one end is connect with power supply and discharge ball gap high-voltage end；Control system control connection DC power supply, measuring device and ball gap control device.Rationally cooperated by device parameter each in circuit, the test waveform for meeting standard requirements can be obtained, according to the test method of standard requirements, completes the various discharge tests of high and low pressure power capacitor.
Description
[technical field]
The present invention relates to power capacitor test loops, put more particularly to a kind of power capacitor suitable for multi-parameter
Electric test circuit and method.
[background technique]
Currently, power capacitor is applied to high-low pressure power transmission and distribution, high reliablity good to power capacitor requirement stability,
For the quality testing of power capacitor, more stringent requirements are proposed, and country, professional standard all try the electric discharge of power capacitor
It tests and proposes strict demand.
The discharge test of power capacitor is divided into two classes --- undamped electric discharge (short circuit dischange) test and damping electric discharge examination
It tests, whether the former is mainly used for examining the cooperation between power capacitor inner structural strength, each internal element of verifying proper；Afterwards
Person is mainly used for the concrete condition simulated power capacitor in actual use, carries out life appraisal etc. to it.
Current each producer can only meet partial discharge test requirements document, and damping discharge test can not be completed effectively.
Even for road discharge test, most of is also to use interim trial circuit, and failure is more when test, and for test parameters, wave
Shape can not be recorded effectively.
[summary of the invention]
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of power capacitors suitable for multi-parameter to put
Electric test circuit and method are rationally cooperated by device parameter each in circuit, can obtain the test waveform for meeting standard requirements,
According to the test method of standard requirements, the various discharge tests of high and low pressure power capacitor are completed.
To achieve the above object, the invention adopts the following technical scheme:
A kind of power capacitor discharge test circuit suitable for multi-parameter, including it is DC power supply, REgulatable reactor, adjustable
Resistor, discharge ball gap, circuit reconfiguration switch, measuring device and control system；It is the DC power supply, discharge ball gap, adjustable
Resistor and REgulatable reactor successively connect to form major loop along current direction, the low-pressure end ground connection of DC power supply；Described returns
Road reconfiguration switchs the high-voltage end of one end connection discharge ball gap, and the other end connects the low-pressure end of REgulatable reactor；When test, test product electricity
One end is connect with power supply and discharge ball gap high-voltage end；
The measuring device includes that voltage measuring apparatus makes and current measuring device, and voltage measuring apparatus acquires test product electricity
Container both end voltage, and collection voltages signal is transmitted to survey control system；Current measuring device acquires main circuit current, and will
Acquisition current signal is transmitted to survey control system；
The discharge ball gap includes copper ball gap and graphite nodule gap, and two ball gap parallel connections access circuit, discharge ball gap and ball gap
Control device connection, ball gap control device is for discharge ball gap selected to use and control discharge ball gap movement；
Control system control connection DC power supply, measuring device and ball gap control device.
As a further improvement of the present invention, 1 the continuous of the μ of μ H~4210 H of inductance parameters of the REgulatable reactor can
It adjusts.
As a further improvement of the present invention, resistance value 0.1 Ω~200 Ω's of the adjustable resistor is continuously adjustable.
As a further improvement of the present invention, the ball gap control device uses the solenoid valve control ball gap of PLC control
Pneumatic travel switch is with the division of ball gap selected to use and control ball gap.
As a further improvement of the present invention, the voltage measuring apparatus uses RC divider；The electric current is surveyed
It measures device and uses Rogowski coil；The DC power supply exports direct current by rectifier bridge using after pressure regulator series transformer
Voltage.
As a further improvement of the present invention, the REgulatable reactor, adjustable resistor and discharge ball gap are each attached to
It insulate on bogey.
As a further improvement of the present invention, the major loop is fixedly connected using 50mm × 10mm TMY bronze medal,
Major loop is flexible coupling using cross-sectional area not less than 500mm2Copper conductor connection；Between voltage measuring apparatus and major loop
Connection should be not less than 2.5mm using cross-sectional area2Copper conductor connection；Connection between current collecting device and TT&C system into
Row electrical isolation.
A kind of test method based on the power capacitor discharge test circuit for being suitable for multi-parameter, including short circuit dischange examination
Test step and damping discharge test:
1) short circuit dischange is tested,
1.1) REgulatable reactor and adjustable resistor are shorted using circuit reconfiguration switch；
1.2) discharge current approximate range is gone out by simulation calculation, ball gap control device selects suitable ball in discharge ball gap
Gap；
1.3) current measuring device range is adjusted under reduced test voltage to meet test needs；
1.4) test voltage and test number (TN) are inputted in control system, is tested；
2) discharge test is damped
2.1) disconnect circuit reconfiguration switch, so that REgulatable reactor and adjustable resistor is serially connected with major loop；
2.2) according to the test waveform frequency of oscillation f of test requirements document, peak value ratioAnd the first peak point current I1mAnd subject
Capacitor capacitance value C calculates the inductance L of REgulatable reactor, calculation formula
2.3) determine the mode of connection of REgulatable reactor according to calculated reactor inductance value L, and match be suitable for can
Adjust the resistance value R of resistor；
2.4) according to the first peak point current I1m, ball gap control device selects suitable ball gap in discharge ball gap；
2.5) current measuring device range is adjusted under reduced test voltage to meet test needs；
2.6) test voltage and test number (TN) are inputted in control system, is tested.
Compared with the existing technology, the invention has the following advantages:
Circuit of the invention utilizes adjustable reactance device, adjustable resistor, adjustable pneumatic ball gap and corresponding observing and controlling
The conventional equipments such as device and device are calculated by parameter and equipment rationally cooperate, can obtain the test wave for meeting test demand
Shape and data complete the discharge test of various types of high-low pressure power capacitors；It, can be complete, real-time by TT&C system
Record test relevant parameter and waveform；By simple circuit wire-connecting, can satisfy different test demands, (short circuit is put
Electricity and damping electric discharge).Circuit of the present invention can satisfy the test requirements document of different parameters test product, and capacitance parameter distribution is big,
From 1 μ of μ F~1000 F.
Further, REgulatable reactor forms regulative reactance using 5 mutually independent reactor units adjusted with tap
Device group can be realized the continuously adjustable of 1 μ of μ H~4210 H of inductance parameters, meet the electric discharge of the capacitor test product for multi-parameter
Test needs.
Further, adjustable resistor use is by 1 Ω noninductive resistance 10,10 Ω noninductive resistance 9,100 Ω noninductive resistances 1
A composition can resistance regulator, can be realized the continuously adjustable of resistance parameter 0.1 Ω~200 Ω, meet the electricity for multi-parameter
The discharge test of container test product needs.
Further, discharge ball gap 5, which has, uses 100mm copper ball gap and each one, 200mm graphite nodule gap, to meet different amplitudes
The needs of discharge current.
Test method of the invention, being disconnected by circuit reconfiguration switch, which realizes test battery circuit with closure, is able to carry out
Short circuit dischange test and damping discharge test, test operation is simple, and failure is more when test, and can not for test parameters, waveform
Effective record.The test waveform for meeting standard requirements can be obtained, according to the test method of standard requirements, completes high and low pressure
The various discharge tests of power capacitor.
[Detailed description of the invention]
Fig. 1 is present example connection schematic diagram；
In figure: 1, DC power supply；2, test product capacitor；3, REgulatable reactor；4, adjustable resistor；5, discharge ball gap；6,
Circuit reconfiguration switch；7, measuring device；8, control system.
[specific embodiment]
The invention will be described in further detail with reference to the accompanying drawing:
As described in Figure 1, a kind of power capacitor discharge test circuit suitable for multi-parameter, including DC power supply 1 (use
Obtained after AC power source is rectified), REgulatable reactor 3, adjustable resistor 4, discharge ball gap 5, insulation bogey, ball gap control
Device, measuring device 7 and control system 8；REgulatable reactor 3, adjustable resistor 4 and the discharge ball gap 5 is each attached to it
It insulate on bogey；3 one end of REgulatable reactor and adjustable resistor 4；Adjustable resistor 4 is fixed with 5 low-pressure end of discharge ball gap
Connection；2 one end of test product capacitor is connect with power supply 1 and 5 high-voltage end of discharge ball gap, other end ground connection；1 other end of power supply ground connection；
Reconfiguration switch 6 one end in circuit connects the low-pressure end of REgulatable reactor 3, and the other end connects 5 low-pressure end of discharge ball gap.REgulatable reactor
3 and adjustable resistor 4 for adjusting loop parameter；Ball gap control device is dynamic for ball gap 5 selected to use and control ball gap 5
Make；Control system 8 is for functions such as control loop voltage, acquisition test waveform and record discharge times.
Measuring device 7 makes including voltage measuring apparatus and current measuring device, and voltage measuring apparatus acquires test product capacitor 2
Both end voltage, and collection voltages signal is transmitted to and surveys control system 8；Current measuring device acquires main circuit current, and will adopt
Colleeting comb signal, which is transmitted to, surveys control system 8；
Since type approval test faces the diversity of product, the test that laboratory allows for meeting different parameters test product is wanted
It asks, the problem of this brings simultaneously is exactly that capacitance parameter distribution is big, from the 1 μ F of μ F~1000, for the parameter of test loop
Adjustable range is a huge challenge.
When carrying out discharge current test, according to the test waveform frequency of oscillation f of test requirements document, peak value ratioAnd first peak
It is worth electric current I1mWith subject capacitor capacitance value C, the inductance L of REgulatable reactor, calculation formula are calculated
Take peak value ratioIt is 0.7, when test product capacitance is 40 μ F, when frequency of oscillation f requires to be 0.5kHz, theory access circuit
Reactance value is 2524.9 μ H；And when being 40kHz, the reactance value in theory access circuit is 0.4 μ H.
Table 1
| Discharge frequency kHz | C=1 μ F | C=10 μ F | C=50 μ F | C=100 μ F | C=500 μ F |
| 0.5 | 1010.0 | 202.0 | |||
| 1 | 2524.9 | 252.5 | 50.5 | ||
| 2.5 | 4039.8 | 404.0 | 4039.8 | 40.4 | 8.1 |
| 3 | 2805.4 | 280.5 | 2805.4 | 28.1 | 5.6 |
| 5 | 1010.0 | 101.0 | 1010.0 | 10.1 | 2.0 |
| 10 | 252.5 | 25.2 | 252.5 | 2.5 | 0.5 |
| 20 | 63.1 | 6.3 | 63.1 | 0.6 |
Note: it chooses
Further, REgulatable reactor 3 forms regulative reactance using 5 mutually independent reactor units adjusted with tap
Device group, 5 reactors be respectively as follows: adjust 1 μ H of step-length 10 μ H reactors 1, adjust 10 μ H of step-length 100 μ H reactors 2,
It adjusts the 1000 μ H reactors 1 of 100 μ H of step-length, adjust the 3000 μ H reactors 1 of 1000 μ H of step-length；Each reactor unit can
Different taps are used as needed, can be connected or are shorted between each unit, can be realized the continuous of 1 μ of μ H~4210 H of inductance parameters
It is adjustable, meet the discharge test needs of the capacitor test product for multi-parameter；
Further, 4 use of adjustable resistor is by 1 Ω noninductive resistance 10,10 Ω noninductive resistance 9,100 Ω noninductive resistances
1 composition can resistance regulator, can be combined as desired by the connection of serial or parallel connection between each resistance, can be realized resistance
Parameter 0.1 Ω~200 Ω's is continuously adjustable, meets the discharge test needs of the capacitor test product for multi-parameter.
Further, discharge ball gap 5 has with 100mm copper ball gap and each one, 200mm graphite nodule gap, two ball gap parallel connections access
Circuit, to meet the needs of different amplitude discharge currents.
Further, the pneumatic travel switch of solenoid valve control ball gap that ball gap control device is controlled using PLC is to select to use
Ball gap and control ball gap division.
Further, voltage measuring apparatus is acquired using RC divider, be transmitted to survey control system 8 carry out unified acquisition,
Record.
Further, current measuring device uses Rogowski coil, can there is effective isolated loop high voltage, current signal
It is transmitted to survey control system 8 and carries out unified acquisition, record.
Control system 8 is acquired test data and waveform, records, while control loop divide-shut brake, control loop are tried
Electrical verification pressure, control ball gap control device movement etc..
Power supply exports DC voltage by rectifier bridge using after pressure regulator series transformer.
The present invention is based on the test method in the power capacitor discharge test circuit for being suitable for multi-parameter is as follows:
(1) short circuit dischange is tested
A kind of test method of power capacitor short circuit dischange, subject capacitor 2 are serially connected with after DC power supply 1；
1. reactor 3 and resistor 4 are shorted using circuit reconfiguration switch 6；
2. going out discharge current approximate range by simulation calculation, discharge ball gap 5 is selected；
3. current measuring device range is adjusted under reduced test voltage to meet test needs；
4. inputting test voltage and test number (TN) in control system 8, tested；
(2) discharge test is damped
A kind of test method of power capacitor damping electric discharge, subject capacitor 2 are serially connected with after DC power supply 1, will return
Road reconfiguration switch 6 disconnects, and reactor 3 and resistor 4 is made to be serially connected with circuit；
1. according to the test waveform frequency of oscillation f of test requirements document, peak value ratioAnd the first peak point current I1mWith subject electricity
Capacitor value C calculates the inductance L of REgulatable reactor, calculation formula
2. determining the mode of connection of reactor according to calculated reactor inductance value L, and match suitable resistance value R；
3. according to the first peak point current I1m, select discharge ball gap；
4. current measuring device range is adjusted under reduced test voltage to meet test needs；
5. inputting test voltage and test number (TN) in control system 8, tested.
It is fixedly connected using 50mm × 10mm TMY bronze medal, 500mm should be no less than using cross-sectional area by being flexible coupling2Copper
Conducting wire connection；Connection between voltage measuring apparatus and major loop should be no less than 2.5mm using cross-sectional area2Copper conductor connect
It connects；Connection between current collecting device and TT&C system need to have effective electrical isolation.
Disclosed above be only a kind of most representative embodiment of the present invention, cannot limit this certainly with this
The interest field of invention, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (8)
1. a kind of power capacitor discharge test circuit suitable for multi-parameter, which is characterized in that including DC power supply (1), can
Adjust reactor (3), adjustable resistor (4), discharge ball gap (5), circuit reconfiguration switch (6), measuring device (7) and control system
(8)；DC power supply (1), discharge ball gap (5), adjustable resistor (4) and the REgulatable reactor (3) is successively along current direction
Connection forms major loop, the low-pressure end ground connection of DC power supply (1)；Described circuit reconfiguration switch (6) one end connects discharge ball gap
(5) low-pressure end, the other end connect the low-pressure end of REgulatable reactor (3)；When test, test product capacitor (2) one end and power supply (1)
And the connection of discharge ball gap (5) high-voltage end, test product capacitor (2) other end ground connection；
The measuring device (7) includes that voltage measuring apparatus makes and current measuring device, and voltage measuring apparatus acquires test product electricity
Container (2) both end voltage, and collection voltages signal is transmitted to control system (8)；Current measuring device acquires main circuit current,
And acquisition current signal is transmitted to control system (8)；
The discharge ball gap (5) includes copper ball gap and graphite nodule gap, and two ball gap parallel connections access circuit, discharge ball gap (5) and ball
The connection of gap control device, ball gap control device is for discharge ball gap (5) selected to use and control discharge ball gap (5) movement；
Control system (8) control connection DC power supply (1), measuring device (7) and the ball gap control device.
2. the power capacitor discharge test circuit according to claim 1 suitable for multi-parameter, which is characterized in that described
REgulatable reactor (3) 1 μ of μ H~4210 H of inductance parameters it is continuously adjustable.
3. the power capacitor discharge test circuit according to claim 2 suitable for multi-parameter, which is characterized in that described
Adjustable resistor (4) resistance value 0.1 Ω~200 Ω it is continuously adjustable.
4. the power capacitor discharge test circuit according to claim 1 suitable for multi-parameter, which is characterized in that described
Ball gap control device using PLC control the pneumatic travel switch of solenoid valve control ball gap with ball gap selected to use and control ball
The division of gap.
5. the power capacitor discharge test circuit according to claim 1 suitable for multi-parameter, which is characterized in that described
Voltage measuring apparatus use RC divider；The current measuring device uses Rogowski coil；The direct current
Source (1) exports DC voltage by rectifier bridge using after pressure regulator series transformer.
6. the power capacitor discharge test circuit according to claim 1 suitable for multi-parameter, which is characterized in that described
REgulatable reactor (3), adjustable resistor (4) and discharge ball gap (5) be each attached to insulation bogey on.
7. the power capacitor discharge test circuit according to claim 1 suitable for multi-parameter, which is characterized in that described
Major loop be fixedly connected using 50mm × 10mm TMY bronze medal, being flexible coupling for major loop is not less than using cross-sectional area
500mm2Copper conductor connection；Connection between voltage measuring apparatus and major loop should be not less than 2.5mm using cross-sectional area2's
Copper conductor connection；Connection between current collecting device and control system (8) carries out electrical isolation.
8. a kind of test method based on the power capacitor discharge test circuit described in claim 1 suitable for multi-parameter,
It is characterised in that it includes short circuit dischange test procedure and damping discharge test:
1) short circuit dischange is tested,
1.1) REgulatable reactor (3) and adjustable resistor (4) are shorted using circuit reconfiguration switch (6)；
1.2) discharge current approximate range is gone out by simulation calculation, ball gap control device selects suitable ball in discharge ball gap (5)
Gap；
1.3) current measuring device range is adjusted under reduced test voltage to meet test needs；
1.4) test voltage and test number (TN) are inputted in control system (8), is tested；
2) discharge test is damped
2.1) circuit reconfiguration switch (6) is disconnected, REgulatable reactor (3) and adjustable resistor (4) is made to be serially connected with major loop；
2.2) according to the test waveform frequency of oscillation f of test requirements document, peak value ratioFirst peak point current I1mAnd second peak value electricity
Flow I2mWith subject capacitor capacitance value C, the inductance L of REgulatable reactor is calculated0, calculation formula
2.3) it determines the mode of connection of REgulatable reactor (3) according to calculated reactor inductance value L, and matches be suitable for adjustable
The resistance value R of resistor (4)；
2.4) according to the first peak point current I1m, ball gap control device selects suitable ball gap in discharge ball gap (5)；
2.5) current measuring device range is adjusted under reduced test voltage to meet test needs；
2.6) test voltage and test number (TN) are inputted in control system (8), is tested.
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| CN201611199487.6A CN106646173B (en) | 2016-12-22 | 2016-12-22 | It is a kind of suitable for the power capacitor discharge test circuit of multi-parameter and method |
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| CN106646173B true CN106646173B (en) | 2019-01-25 |
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Citations (5)
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|---|---|---|---|---|
| US4721899A (en) * | 1987-02-20 | 1988-01-26 | Keytek Instrument Corp. | Combined air-direct testing simulator |
| CN2227343Y (en) * | 1995-10-06 | 1996-05-15 | 杨大成 | Voltage measuring device for main frequency experimental |
| CN104007378A (en) * | 2014-05-05 | 2014-08-27 | 合容电气股份有限公司 | Testing device and method for damping discharging of series capacitor |
| CN105223484A (en) * | 2015-10-27 | 2016-01-06 | 西安交通大学 | A kind of dry reactor higher-order of oscillation impulse voltage endurance test method and system thereof |
| CN205317867U (en) * | 2015-12-03 | 2016-06-15 | 国家电网公司 | Power capacitor tolerance blasting energy testing apparatus |
-
2016
- 2016-12-22 CN CN201611199487.6A patent/CN106646173B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721899A (en) * | 1987-02-20 | 1988-01-26 | Keytek Instrument Corp. | Combined air-direct testing simulator |
| CN2227343Y (en) * | 1995-10-06 | 1996-05-15 | 杨大成 | Voltage measuring device for main frequency experimental |
| CN104007378A (en) * | 2014-05-05 | 2014-08-27 | 合容电气股份有限公司 | Testing device and method for damping discharging of series capacitor |
| CN105223484A (en) * | 2015-10-27 | 2016-01-06 | 西安交通大学 | A kind of dry reactor higher-order of oscillation impulse voltage endurance test method and system thereof |
| CN205317867U (en) * | 2015-12-03 | 2016-06-15 | 国家电网公司 | Power capacitor tolerance blasting energy testing apparatus |
Non-Patent Citations (1)
| Title |
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| 干式空心电抗器匝间绝缘试验电压的产生方法研究;聂洪岩 等;《电力科学与技术学报》;20160630;第31卷(第2期);45-50 |
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Effective date of registration: 20210818 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an province high tech Zone No. 7 Tang Xing Lu Patentee before: CHINA XD ELECTRIC Co.,Ltd. Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |