CN106383301A - Double-fracture circuit breaker DC steady state voltage distribution wiring loop and test method - Google Patents
Double-fracture circuit breaker DC steady state voltage distribution wiring loop and test method Download PDFInfo
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- CN106383301A CN106383301A CN201610881611.0A CN201610881611A CN106383301A CN 106383301 A CN106383301 A CN 106383301A CN 201610881611 A CN201610881611 A CN 201610881611A CN 106383301 A CN106383301 A CN 106383301A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a double-fracture circuit breaker DC steady state voltage distribution wiring loop and test method. The double-fracture circuit breaker DC steady state voltage distribution wiring loop comprises a circuit breaker which is provided with a grounding end fracture K1 and a high voltage end fracture K2. The high voltage end fracture K2 is connected with a DC voltage withstand complete device and a voltmeter U. The grounding end fracture K1 is grounded at one end, and the two ends are connected in parallel with discharge ball gaps. The DC voltage withstand complete device comprises a voltage boosting power supply cabinet DCVMS, a DC generator voltage multiplying cylinder, measurement impedance and a protective resistor Rp. The invention also discloses a double-fracture circuit breaker DC steady state voltage distribution test method. The distribution situation of the steady state voltage ratio is solved by using the mode of applying DC voltage with the ball gap distance acting as a variable. The real operation condition of the site is simulated as much as possible, and the voltage distribution situation of the circuit breaker under DC steady state voltage is inspected.
Description
Technical field
The present invention relates to DC transmission system O＆M technical field is and in particular to a kind of double-fracture chopper DC Steady is electric
Depress connection circuit and the test method of two fracture DC voltage distributions.
Background technology
Double-fracture chopper is widely used in power system, and wherein ac filter chopper is one of which, as
A kind of visual plant of current conversion station, can reduce the harmonic wave producing in alternating current-direct current conversion process it is ensured that the quality of power supply is up to standard.And hand over
Stream filter and breaker (hereinafter referred to as ACF chopper), due to its special application scenario, need to cut off capacitive load, switching frequency
Numerous, wherein two fracture DC voltage distributions can affect chopper and cut-off success rate, and comparing normal circuit breaker should be to its two fracture
DC voltage distribution measures.
When chopper cuts alternating current filter capacitive load, the change procedure of fracture both end voltage.Due to chopper and capacitive
After load, capacitive load voltage will not occur temporarily to become in theory, simultaneously because filter capacitor capacitance is larger, voltage declines more
Slowly, be therefore equivalent to and apply a DC voltage in chopper side.
At present, international standard, domestic standard and industry standard do not enter professional etiquette to the voltage's distribiuting of double-fracture chopper
Fixed, there is no corresponding test method and test connection loop yet.But because double-fracture chopper is predominantly located in open air, due to
Filthy presence, chopper sheet resistance can change, simultaneously because DC voltage is distributed according to sheet resistance, therefore studies
DC voltage distribution is significant.But because divider impedance is less, after being directly incorporated into fracture, its impedance can be changed,
Lead to voltage measurement distortion.
Content of the invention
For correct measurement DC voltage between breaker fracture distribution situation, an object of the present invention is based on survey
The needs of amount double-fracture chopper DC Steady voltage's distribiuting, provide a kind of double-fracture chopper DC Steady voltage's distribiuting test
The true operating condition of connection circuit, as far as possible simulated field, examination chopper is in DC Steady voltage distribution situation.
For achieving the above object, the present invention adopts the technical scheme that：
A kind of connection circuit of double-fracture chopper DC Steady voltage's distribiuting, including chopper, it has earth terminal and breaks
Mouthful K1 and high-pressure side fracture K2 it is characterised in that：Described high-pressure side fracture K2 is connected with DC break down voltage complexes and voltmeter
U, affiliated earth terminal fracture K1 is grounded at one end, and its two ends is parallel with ball discharge gap；Described DC break down voltage complexes bag
Booster power cabinet DCVMS, DC generator times pressure cylinder, measurement impedance and protective resistance R are includedp；Described booster power cabinet DCVMS
Square wave power is exported to DC generator times pressure cylinder after receiving control command；Described DC generator times pressure cylinder includes intermediate frequency transformation
Device TT, commutation diode D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1 and times voltage capacitance CS2, described intermediate frequency becomes
Depressor TT accesses the square wave current of booster power cabinet DCVMS, primary side string after an ammeter and times voltage capacitance Cs1 in primary side
Meet isolation resistance Re, described isolation resistance ReThe other end is positive to connect commutation diode D1 and times voltage capacitance CS2, times voltage capacitance CS2
The other end connects negative sense and connects commutation diode D2, and this end is also associated with the high-voltage output end of DC generator times pressure cylinder, described
The positive port of commutation diode D2 and commutation diode D1 negative sense port connect times voltage capacitance C altogetherS1 one end, this end is connected with directly
The low-voltage output of flow-generator times pressure cylinder, times voltage capacitance CS1 other end takes back intermediate-frequency transformer TT after an ammeter,
The low-voltage output ground connection of DC generator times pressure cylinder；Described measurement impedance one end connects the low pressure of DC generator times pressure cylinder 22
Outfan, the other end connects the high-pressure side fracture K2 of chopper；Protective resistance RpTwo ends respectively with high-pressure side fracture K2 and straight
The low-voltage output of flow-generator times pressure cylinder connects.
Further, also include earth-return circuit, it includes the earth resistance R being in serieseWith switch K, switch another termination of K
Ground, earth resistance ReThe other end connects high-pressure side fracture K2.
Another object of the present invention is to providing a kind of test method of double-fracture chopper DC Steady voltage's distribiuting, its
DC voltage is applied from actual measurement chopper as variable using ball discharge stand-off distance, realizes breaker fracture DC Steady voltage's distribiuting
The measurement of situation.
For achieving the above object, the present invention adopts the technical scheme that：
A kind of test method of double-fracture chopper DC Steady voltage's distribiuting is straight using the above-mentioned double-fracture chopper stated
The connection circuit of stream steady state voltage distribution, comprises the following steps：
Step 1, breakdown test is individually carried out to the ball discharge gap of fixed interval (FI) distance using DC generator times pressure cylinder, obtain
Ball gap dc breakdown magnitude of voltage under this gap, and it is designated as U1；；
Step 2, the high-pressure side fracture K2 to chopper apply high direct voltage, and the two ends that earth terminal fracture K1 is grounded simultaneously are simultaneously
The ball discharge gap of step 1 fixed interval (FI) distance on connection；
Step 3, by DC break down voltage assay device test voltage at the uniform velocity raise until ball gap puncture, record DC generator defeated
Going out voltage is U；
Step 4, increase ball discharge gap clearance distance, enter step 1 circulate operation, until clearance distance exceed threshold value away from
From rear stop circulation, and record different gap apart under U1, U；
Step 5, calculate different gap apart from earth terminal fracture DC Steady voltage accounting:U1/U.
Further, also include the ball discharge gap under each clearance distance is carried out three breakdown tests, and to obtaining
Ball gap dc breakdown magnitude of voltage U1 and DC generator output voltage U does average treatment.
Compared with prior art, its advantage is the present invention：Using DC voltage generator assay device and survey
Amount ball gap, applies high direct voltage in chopper one fracture, simultaneously another fracture ground connection, a wherein ground connection fracture both sides measurement in parallel
Ball gap, applies voltages to ball gap and punctures, then can calculate two fracture distributions and bear magnitude of voltage, reach measurement double-fracture chopper steady
The purpose of voltage's distribiuting under state DC voltage operating mode.
Brief description
Fig. 1 is the connection circuit schematic diagram of double-fracture chopper DC Steady voltage's distribiuting of the present invention；
Fig. 2 is the structural representation of double-fracture chopper；
Fig. 3 is the schematic flow sheet of the test method of double-fracture chopper DC Steady voltage's distribiuting of the present invention；
Specific embodiment
With reference to the accompanying drawings and detailed description present disclosure is described in further details.
Refer to shown in Fig. 1 and Fig. 2, a kind of connection circuit of double-fracture chopper DC Steady voltage's distribiuting, this loop
For testing this test item of double-fracture chopper, the chopper that described double-fracture chopper is generally used for alternating current filter is
220kV and the chopper of ratings above；Described connection circuit includes chopper 1, and it has earth terminal fracture K1 and high-pressure side breaks
Mouth K2, described high-pressure side fracture K2 are connected with DC break down voltage complexes 2 and voltmeter U, and affiliated earth terminal fracture K1 is at one end
Ground connection, and its two ends is parallel with ball discharge gap 3；Described DC break down voltage complexes 2 include booster power cabinet DCVMS, straight
Flow-generator times pressure cylinder 22, measurement impedance 23 and protective resistance Rp；Described booster power cabinet DCVMS exports after receiving control command
Square wave power is to DC generator times pressure cylinder 22；Described DC generator times pressure cylinder 22 includes intermediate-frequency transformer TT, rectification two pole
Pipe D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1 and times voltage capacitance CS2, described intermediate-frequency transformer TT is in primary side
Access the square wave current of booster power cabinet DCVMS after an ammeter 21 and times voltage capacitance Cs1, primary side concatenates isolation resistance
Re, described isolation resistance ReThe other end is positive to connect commutation diode D1 and times voltage capacitance CS2, times voltage capacitance CS2 other ends connect
Negative sense connects commutation diode D2, and this end is also associated with the high-voltage output end of DC generator times pressure cylinder 22, described rectification two pole
The positive port of pipe D2 and commutation diode D1 negative sense port connect times voltage capacitance C altogetherS1 one end, this end is connected with DC generator
The low-voltage output of times pressure cylinder 22, times voltage capacitance CS1 other end takes back intermediate-frequency transformer TT, direct current after an ammeter 21
The low-voltage output ground connection of generator voltage doubling cylinder 22；Described measurement impedance 23 one end connects the low pressure of DC generator times pressure cylinder 22
Outfan, the other end connects the high-pressure side fracture K2 of chopper 1；Protective resistance RpTwo ends respectively with high-pressure side fracture K2 and straight
The low-voltage output of flow-generator times pressure cylinder 22 connects.
As another embodiment, described connection circuit also includes earth-return circuit 24, and it includes the ground connection electricity being in series
Resistance ReWith switch K, switch K other end ground connection, earth resistance ReThe other end connects high-pressure side fracture K2.
Described booster power cabinet DCVMS：High voltage output scope selects different gears according to actual needs, is connected to boosting and refers to
After order, the variable square wave power of output amplitude is to DC generator times pressure cylinder 22.
Described DC generator times pressure cylinder 22, for square wave power is passed through its built-in intermediate-frequency transformer TT boosting, then
Through its interior commutation diode D1, D2 output high pressure.
Described
Its operation principle and work process are as follows：
1. input power is pre- steady：Because line voltage has fluctuation, so by supply voltage, stable output needs in advance first
The DC low voltage power supply wanted, due to needing to meet the output area of ultra-wide it is therefore an objective to reduction power network fluctuation amplitude is defeated to major loop
Go out direct current impact；
2. copped wave boosting (low pressure feedback)：The mode that pre- steady low-voltage dc power supply is boosted through copped wave exports can
With the out-put supply of zero, to export low pressure for feedback signal it is therefore an objective to export the high stable DC low voltage power supply that can adjust；
3. copped wave boosting (high-voltage feedback)：The mode that high stable DC low voltage power supply is boosted through copped wave exports low tension
Source, with high tension voltage for feedback signal it is therefore an objective to the fluctuation of high tension voltage can be automatically adjusted output high stable DC low-voltage electricity
Source；
4. bridge type inverse：High stable DC low voltage power supply is reverse into the adjustable square wave power of amplitude；
5. intermediate-frequency transformer TT, DC generator times pressure cylinder 22, measuring cylinder (not shown)：Square wave power is become through intermediate frequency
Depressor TT boosts, then exports high pressure through commutation diode D1, D2 rectification, and multiplication of voltage adopts doube bridge arm to export, it is possible to decrease ripple system
Number；High-tension measurement and high-pressure sampling signal adopt the high-tension resistive of high precision high stability degree Low Drift Temperature.
A kind of test method of double-fracture chopper DC Steady voltage's distribiuting of the present invention, in above-mentioned double-fracture chopper
On the basis of the connection circuit of DC Steady voltage's distribiuting, direct current is applied from actual measurement chopper as variable using ball discharge stand-off distance
Voltage, realizes the measurement of breaker fracture DC Steady voltage's distribiuting situation, referring to shown in Fig. 3, comprises the following steps：
Step 1, individually the ball discharge gap 3 of fixed interval (FI) distance is carried out puncturing examination using DC generator times pressure cylinder 22
Test, obtain the ball gap dc breakdown magnitude of voltage under this gap, and be designated as U1；In the present embodiment, select clearance distance to be 6mm,
12mm, 19mm and 30mm illustrate.
Table 1 measuring voltage distribution is grouped
| Sphere gap length (mm) | Ball gap breakdown voltage U1 (kV) | DC side test voltage U (kV) | Ground connection fracture DC Steady voltage accounting (%) |
| 6 | / | / | / |
| 12 | / | / | / |
| 19 | / | / | / |
| 30 | / | / | / |
Step 2, the high-pressure side fracture K2 to chopper 1 apply high direct voltage, simultaneously the two ends of earth terminal fracture K1 ground connection
The ball discharge gap 3 of step 1 fixed interval (FI) distance in parallel connection；
Step 3, by DC break down voltage assay device test voltage at the uniform velocity raise until ball gap puncture, record DC generator defeated
Going out voltage is U, that is, be directed to table 1 and execute the detection that U is pressed in DC test electrical verification；
Step 4, the clearance distance of increase ball discharge gap 3, enter step 1 circulate operation, until clearance distance exceedes threshold value
Apart from rear stop circulation, and record different gap apart under U1, U；
Step 5, calculate different gap apart from earth terminal fracture DC Steady voltage accounting:U1/U.
As another embodiment, during test is pressure, because ball-gap discharge has certain dispersibility, therefore to each
Ball gap under clearance distance carries out three breakdown tests.Double-fracture chopper carries out test voltage according to packet in table 1, to obtaining
Ball gap dc breakdown magnitude of voltage U1 and DC generator output voltage U do average treatment, then can measure double-fracture chopper break
Mouth DC Steady voltage's distribiuting situation.
Illustrated with certain current conversion station 500kV double-fracture chopper DC Steady voltage's distribiuting test examples.Double-fracture breaks
Road device carries out Potential distribution measurement result using ball gap, as shown in table 2 below, can measure different sphere gaps apart under fracture
Potential distribution situation：
Table 2 different gap is apart from lower fracture Potential distribution situation
According to test data analyzer, of substantially equal under fracture DC Steady voltage's distribiuting positive-negative polarity, with ball stand-off distance from
Increase, ground connection fracture DC Steady voltage accounting increase, be 44% to the maximum, can accurately measure double-fracture DC Steady voltage
Distribution.
Above-described embodiment simply to illustrate that the technology design of the present invention and feature, its objective is to be to allow in the art
Those of ordinary skill will appreciate that present disclosure and implements according to this, can not be limited the scope of the invention with this.All
It is the equivalent change or modification made according to the essence of present invention, all should cover within the scope of the present invention.
Claims (4)
1. a kind of connection circuit of double-fracture chopper DC Steady voltage's distribiuting, including chopper (1), it has earth terminal and breaks
Mouthful K1 and high-pressure side fracture K2 it is characterised in that：Described high-pressure side fracture K2 is connected with DC break down voltage complexes (2) and voltage
Table U, affiliated earth terminal fracture K1 is grounded at one end, and its two ends is parallel with ball discharge gap (3)；Described DC break down voltage becomes suit
Put (2) and include booster power cabinet DCVMS, DC generator times pressure cylinder (22), measurement impedance (23) and protective resistance Rp；Described
Booster power cabinet DCVMS exports square wave power to DC generator times pressure cylinder (22) after receiving control command；Described direct current occurs
Device times pressure cylinder (22) includes intermediate-frequency transformer TT, commutation diode D1, commutation diode D2, isolation resistance Re, times voltage capacitance CS1
Voltage capacitance C againS2, described intermediate-frequency transformer TT access boosting electricity in primary side after an ammeter (21) and times voltage capacitance Cs1
The square wave current of source cabinet DCVMS, primary side concatenates isolation resistance Re, described isolation resistance ReThe other end is positive to connect rectification two pole
Pipe D1 and times voltage capacitance CS2, times voltage capacitance CS2 other ends connect negative sense and connect commutation diode D2, and this end is also associated with direct current and sends out
The high-voltage output end of raw device times pressure cylinder (22), the positive port of described commutation diode D2 is with commutation diode D1 negative sense port altogether
Connect times voltage capacitance CS1 one end, this end is connected with the low-voltage output of DC generator times pressure cylinder (22), times voltage capacitance CS1 other end
Intermediate-frequency transformer TT, the low-voltage output ground connection of DC generator times pressure cylinder (22) is taken back after an ammeter (21)；Institute
State the low-voltage output that measurement impedance (23) one end connects DC generator times pressure cylinder (22), the other end connects chopper (1)
High-pressure side fracture K2；Protective resistance RpTwo ends defeated with the low pressure of high-pressure side fracture K2 and DC generator times pressure cylinder (22) respectively
Go out end to connect.
2. the connection circuit of double-fracture chopper DC Steady voltage's distribiuting according to claim 1 is it is characterised in that go back
Include earth-return circuit (24), it includes the earth resistance R being in serieseWith switch K, switch K other end ground connection, earth resistance Re
The other end connects high-pressure side fracture K2.
3. a kind of test method of double-fracture chopper DC Steady voltage's distribiuting, using described in any one of claim 1-2
The connection circuit of double-fracture chopper DC Steady voltage's distribiuting is it is characterised in that comprise the following steps：
Step 1, individually the ball discharge gap (3) of fixed interval (FI) distance is carried out puncturing examination using DC generator times pressure cylinder (22)
Test, obtain the ball gap dc breakdown magnitude of voltage under this gap, and be designated as U1；
Step 2, the high-pressure side fracture K2 to chopper (1) apply high direct voltage, and the two ends that earth terminal fracture K1 is grounded simultaneously are simultaneously
The ball discharge gap (3) of step 1 fixed interval (FI) distance on connection；
Step 3, by DC break down voltage assay device test voltage at the uniform velocity raise until ball gap puncture, record DC generator output electricity
Press as U；
Step 4, increase ball discharge gap (3) clearance distance, enter step 1 circulate operation, until clearance distance exceed threshold value away from
From rear stop circulation, and record different gap apart under U1, U；
Step 5, calculate different gap apart from earth terminal fracture DC Steady voltage accounting:U1/U.
4. the test method of double-fracture chopper DC Steady voltage's distribiuting according to claim 3 is it is characterised in that go back
Including the ball discharge gap under each clearance distance is carried out with three breakdown tests, and to the ball gap dc breakdown magnitude of voltage obtaining
U1 and DC generator output voltage U does average treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881611.0A CN106383301B (en) | 2016-09-30 | 2016-09-30 | Wiring loop of double-fracture circuit breaker direct-current steady-state voltage distribution and testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610881611.0A CN106383301B (en) | 2016-09-30 | 2016-09-30 | Wiring loop of double-fracture circuit breaker direct-current steady-state voltage distribution and testing method |
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| Publication Number | Publication Date |
|---|---|
| CN106383301A true CN106383301A (en) | 2017-02-08 |
| CN106383301B CN106383301B (en) | 2023-02-24 |
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| CN202676815U (en) * | 2012-05-03 | 2013-01-16 | 中国西电电气股份有限公司 | Follow current interrupting test circuit for externally gapped line arrester |
| CN105021980A (en) * | 2015-06-23 | 2015-11-04 | 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 | AC filter circuit breaker double-break voltage distribution feature evaluation system and method |
| CN105137135A (en) * | 2015-08-13 | 2015-12-09 | 国家电网公司 | Simulated electromagnetic disturbance source for isolating switch |
| CN105785247A (en) * | 2016-04-29 | 2016-07-20 | 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 | Circuit-breaker alternating current and direct current mixing voltage withstanding wiring loop used for alternating current filter and test method thereof |
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2016
- 2016-09-30 CN CN201610881611.0A patent/CN106383301B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253317A (en) * | 2011-04-28 | 2011-11-23 | 南方电网科学研究院有限责任公司 | High-altitude power transmission grade alternating current, direct current and impact combined superimposed voltage test method |
| CN202676815U (en) * | 2012-05-03 | 2013-01-16 | 中国西电电气股份有限公司 | Follow current interrupting test circuit for externally gapped line arrester |
| CN105021980A (en) * | 2015-06-23 | 2015-11-04 | 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 | AC filter circuit breaker double-break voltage distribution feature evaluation system and method |
| CN105137135A (en) * | 2015-08-13 | 2015-12-09 | 国家电网公司 | Simulated electromagnetic disturbance source for isolating switch |
| CN105785247A (en) * | 2016-04-29 | 2016-07-20 | 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 | Circuit-breaker alternating current and direct current mixing voltage withstanding wiring loop used for alternating current filter and test method thereof |
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| CN106383301B (en) | 2023-02-24 |
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