CN105259489B - Extra-high voltage neutral reactor scene induced over voltage withstand test system and method - Google Patents
Extra-high voltage neutral reactor scene induced over voltage withstand test system and method Download PDFInfo
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- CN105259489B CN105259489B CN201510859087.2A CN201510859087A CN105259489B CN 105259489 B CN105259489 B CN 105259489B CN 201510859087 A CN201510859087 A CN 201510859087A CN 105259489 B CN105259489 B CN 105259489B
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- 238000012360 testing method Methods 0.000 title claims abstract description 96
- 230000007935 neutral effect Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title description 15
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- 238000002474 experimental method Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
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- 238000009413 insulation Methods 0.000 claims description 14
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- 238000001514 detection method Methods 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
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Abstract
The invention discloses a kind of extra-high voltage neutral reactor scene induced over voltage withstand test system, including frequency conversion experiment power supply, testing transformer, compensation capacitor unit, tested article unit, the frequency conversion experiment power supply, testing transformer, compensation capacitor unit, tested article unit are sequentially connected, the tested article unit includes neutral reactor and ac voltage measurement unit, and neutral reactor and the ac voltage measurement unit is in parallel.A kind of extra-high voltage neutral reactor scene induced voltage test is also disclosed, is calculated according to field device parameters, prevents the excessive damage equipment of electric current.The present invention, which breaches conventional reactor induced over voltage withstand test, can not carry out the bottleneck of high-voltage large current experiment at the scene, make it possible that 1000kV extra-high voltages neutral reactor scene carries out inducting-voltage proof, the blank of domestic live neutral reactor induced over voltage withstand test has been filled up, the reliable and secure operation of extra-high voltage project is effectively ensured.
Description
Technical field
The present invention relates to neutral reactor pressure test technical field, and in particular to a kind of extra-high voltage neutral reactor
Live induced over voltage withstand test system and method.
Background technology
After circuit is cut off from both sides, existing Capacitance Coupled and inductive between non-fault line and open-circuit line,
Continue to provide secondary arc current to faulty line, so as to which arc light passage goes to dissociate when seriously hindering short-circuit；Automatic reclosing simultaneously
Have and be possible to success after trouble point arc extinction and dielectric strength recover, if secondary arc current is too big, reclosing can be caused to lose
Lose.By installing the reactor of one group of delta connection additional on the line, capacitive coupling is compensated, so as to suppress a part of secondary arc current
Horizontal component；One group of star is installed additional in circuit head and end connects vertical component of the reactor for offsetting secondary arc current.Above-mentioned two groups of electricity
Anti- device can be equivalent to neutral point and install low reactance X additional over the groundNY-connection reactor.
By during the failure such as electromagnetic transient state procedure ATP-EMTP simulation analysis and in-site modeling single-phase short circuit reclosing
Wave-record chart, it is known that ultra-high voltage transformer station high-voltage shunt reactor neutral point is XNHead end may bear ceiling voltage
170.6kV.Particularly during the first bar 1000kV Test and pilot projects southeast Shanxi-Nanyang-Jingmen extra-high voltage debugging in the world, once
There is the problem of neutral reactor insulation breakdown, and the analysis found that to be due to that reactor turn-to-turn insulation is destroyed.But in mesh
In preceding live check test, the insulation examination for reactor is only limitted to apply pressure test outside, and the method only examines reactance
The major insulation of device, and the turn-to-turn insulation of itself is not examined effectively.There is research institution's centering point electricity both at home and abroad in recent years
Anti- device turn-to-turn insulation wire examination method has carried out trial Journal of Sex Research, as high-frequency impulse shakes method and lightning impulse voltage test, but not
See and be widely popularized in actual production.First, high-frequency impulse shakes method only to having there is the electricity of the defects of turn-to-turn insulation short circuit
Anti- device is effective, and can not then realize detection function to turn-to-turn insulation hidden danger be present and the reactor of insulation breakdown does not occur；
Secondly, turn-to-turn insulation is examined with lightning impulse voltage test, major defect is that action time is short, and energy is low, and visual examination is difficult
Distinguish, electrical parameter variable quantity is small caused by turn-to-turn short circuit in addition, is also difficult to distinguish from lightning impulse waveform；3rd, above method
Need huge testing equipment to put into, not only floor space is big, and transport, carry, wiring it is all very inconvenient.
The utility model of Application No. 200820067806.2 discloses a kind of controllable reactor induction voltage-resistant experiment power supply dress
Put and its method for measurement of partial discharge, be related to a kind of controlled reactor field test technology.The structure of the present invention is variable-frequency power sources
Cabinet (1), intermediate transformer (2), controlled reactor (6) are sequentially connected, and experiment power supply is provided for controlled reactor (6);Controllable electric
Anti- device (6), detection impedance (5), instrument for measuring partial discharge (7) are sequentially connected, the partial discharge quantity of detection controlled reactor (6);
Intermediate transformer (2), capacitive divider (3), voltmeter (4) are sequentially connected, the test voltage of measurement intermediate transformer (2);Mend
Repay reactor (8) and controlled reactor (6) connection, the reactive current of compensation controlled reactor (6).
The invention of Application No. 201310349281.7 is related to a kind of power supply device for controllable reactor induction voltage-resistant experiment, bag
Include variable-frequency power sources cabinet, intermediate transformer, voltmeter, controlled reactor and instrument for measuring partial discharge, described variable-frequency power sources cabinet with
Intermediate transformer forms circuit connection, and described intermediate transformer and voltmeter form circuit and be connected, described voltmeter and can
Control reactor and form circuit connection, described controlled reactor forms circuit with instrument for measuring partial discharge and is connected.
Above-mentioned two patent be all on reactor induction voltage-resistant experiment, but its design voltage swing 500kV power networks,
It can not meet the use of 1000kV power networks, in-between transformer current damages transformer equipment compared with conference when voltage is higher.
The content of the invention
In view of this, the purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of extra-high voltage neutral reactor
Live induced over voltage withstand test system and method, inducting-voltage proof examination can be carried out to 1000kV extra-high voltages neutral reactor scene
Test, boost operations of the scene of can completing to reactor.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of extra-high voltage neutral reactor scene induced over voltage withstand test system, including frequency conversion experiment power supply, experiment transformation
Device, compensation capacitor unit, tested article unit, it is the frequency conversion experiment power supply, testing transformer, compensation capacitor unit, tested
Article unit is sequentially connected, and the tested article unit includes neutral reactor and ac voltage measurement unit, the neutral point electricity
Anti- device and ac voltage measurement unit is in parallel.
Further, the testing transformer is exciting transformer.
Further, the compensation capacitor unit includes series compensation capacitor and parallel capacitor.
Further, the frequency conversion experiment power supply, testing transformer, series compensation capacitor, neutral reactor be successively
Connection, the parallel capacitor are in parallel with the neutral reactor.
Further, the frequency conversion experiment power supply includes high-tension switch cabinet and variable-frequency power sources.
Further, the ac voltage measurement unit includes kilovoltmeter.
A kind of extra-high voltage neutral reactor scene induced voltage test, comprises the following steps：
1）Calculating preview is carried out according to field device parameters, the excessive damage equipment of electric current is prevented, passes through neutral reactor
Parameter calculates induced over voltage withstand test magnitude of voltage U, according to 80% pressure-resistant level calculation, i.e. U=UL* 0.8, ULRepresent neutral point electricity
The voltage at anti-device both ends；
2）Electric current I to flowing through neutral reactor under test voltageLCalculated：
；
3）Electric current I to flowing through parallel capacitor under test voltageCCalculated：
；
4）Electric current I to flowing through series compensation capacitor and testing transformer2Calculated：
；
5）To electric current IC、I2Numerical value analyzed, parallel capacitor, series compensation capacitor and testing transformer
Technical parameter whether meet to require;
6) output of variable-frequency power sources high-frequency, centering point reactor, parallel capacitor, series compensation capacitor are kept
Analyzed with the size of current of testing transformer, whether judge the insulation examination of reactor has with power frequency during actual motion
Equivalence；
7）Calculate preview to finish, field equipment connecting, frequency conversion experiment power supply output voltage, analysis calculates neutral reactor
Heat endurance and dynamic stability whether meet to require；
8）Complete the live induced over voltage withstand test of neutral reactor.
The invention provides a kind of extra-high voltage neutral reactor scene induced over voltage withstand test system and method, alternating voltage
Measuring unit can be calculated with the voltage of centering point reactor, and alternating voltage is measured using kilovoltmeter, by
High-tension measurement part and low pressure display instrument are formed, it is ensured that the reactor voltage of pressure test is monitored, ensures meter
The value that counts is corresponding with measured value.Whether equipment technical parameters meet that requirement refers to the electric current or electricity for calculating gained in method
It is pressed within the nominal parameter of equipment, equipment will not be caused to damage, guarantee test is smoothed out.Exported in power supply high-frequency
In the case of, realize that series compensation capacitor and parallel capacitor each play the purpose of reactive-load compensation, by calculating
It is 252.4Hz to locate loop resonance frequency.The heat endurance and dynamic stability of reactor refer to specified KA Rms and specified
Peak value is resistant to electric current, can show whether it meets the requirement of field test by the experiment to two values.
The beneficial effects of the invention are as follows：
1）Induced over voltage withstand test can be carried out to 1000kV extra-high voltages neutral reactor scene, the scene of can completing is to electricity
The examination of anti-device turn-to-turn insulation；
2）Pressure build-up test transformer rated voltage is low needed for pilot system, reduces the manufacture difficulty of testing transformer；
3）Pilot system carries reactive-load compensation capacitor, and required active power supply capacity is small, it is possible to achieve field test is wanted
Ask；
4）Equipment conveying is convenient, and floor space is small, and test method is flexible and changeable, adapts to the transport between different tests scene.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the system construction drawing of induced over voltage withstand test system in extra-high voltage neutral reactor scene of the present invention；
Fig. 2 is the system construction drawing that each equipment of the present invention links in detail；
Fig. 3 is the electrical test schematic diagram of the present invention；
Fig. 4 flow charts of the method for the present invention.
Embodiment
It is as follows to the further displaying of inventive technique scheme, embodiment with reference to Fig. 1 to Fig. 4：
Embodiment one
Present embodiments provide a kind of extra-high voltage neutral reactor scene induced over voltage withstand test system, including frequency conversion experiment
Power supply 6, testing transformer 3, compensation capacitor unit 4, tested article unit 5, the frequency conversion experiment power supply 6, testing transformer 3,
Compensation capacitor unit 4, tested article unit 5 are sequentially connected, and the tested article unit 5 includes neutral reactor 9 and alternating current
Measuring unit 10 is pressed, the neutral reactor 9 and ac voltage measurement unit 10 are in parallel.Ac voltage measurement cell pairs
The test voltage of point reactor measures, and verifies the correctness of calculating
The testing transformer 3 includes exciting transformer, excites resonant tank, is made by frequency conversion experiment power supply output frequency
Obtain the inductance in loop and resonance occurs for electric capacity.
The compensation capacitor unit 4 includes series compensation capacitor 7 and parallel capacitor 8.
The frequency conversion experiment power supply 6, testing transformer 3, series compensation capacitor 7, neutral reactor 9 are sequentially connected,
The parallel capacitor 8 is in parallel with the neutral reactor 9.
The frequency conversion experiment power supply 6 includes high-tension switch cabinet 1 and variable-frequency power sources 2, and high-tension switch cabinet rises to testing transformer
To the effect of protection, the excessive damage equipment of electric current is prevented.
The ac voltage measurement unit 10 includes kilovoltmeter.Alternating voltage is surveyed using kilovoltmeter
Amount, is made up of high-tension measurement part and low pressure display instrument, it is ensured that the reactor voltage of pressure test is monitored, protected
It is corresponding with measured value to demonstrate,prove evaluation.
Embodiment two
Present embodiments provide a kind of extra-high voltage neutral reactor scene induced voltage test, including following step
Suddenly：
1）Calculating preview is carried out according to field device parameters, the excessive damage equipment of electric current is prevented, passes through neutral reactor
Parameter calculates induced over voltage withstand test magnitude of voltage U, according to 80% pressure-resistant level calculation, i.e. U=UL* 0.8, ULRepresent neutral point electricity
The voltage at anti-device both ends；
2）Electric current I to flowing through neutral reactor under test voltageLCalculated：
；
3）Electric current I to flowing through parallel capacitor under test voltageCCalculated：
；
4）Electric current I to flowing through series compensation capacitor and testing transformer2Calculated：
；
5）To electric current IC、I2Numerical value analyzed, parallel capacitor, series compensation capacitor and testing transformer
Technical parameter whether meet to require;
6) output of variable-frequency power sources high-frequency, centering point reactor, parallel capacitor, series compensation capacitor are kept
Analyzed with the size of current of testing transformer, whether judge the insulation examination of reactor has with power frequency during actual motion
Equivalence；
7）Calculate preview to finish, field equipment connecting, frequency conversion experiment power supply output voltage, analysis calculates neutral reactor
Heat endurance and dynamic stability whether meet to require；
8）Complete the live induced over voltage withstand test of neutral reactor.
Embodiment three
For certain power grid construction, 1000kV extra-high voltage neutral reactor scene induceds over voltage withstand test, calculated first
Preview, the Breaking capacity of high-tension switch cabinet is selected to select as 1250A；Variable-frequency power sources uses capacity as 450kW frequency conversion tanks, output electricity
0 ~ 350V of scope is pressed, exports maximum current 1285A, 30 ~ 300Hz of frequency range；Testing transformer uses excitation varying capacity
For 450kVA, low-pressure side is in parallel using 350V double windings, rated voltage 400V, rated current 1125A, high-pressure side rated voltage
20kV, rated current 22.5A；Series compensation capacitor is 50nF from separate unit capacitance, and shunt capacitor uses 5 capacitances
In parallel for 50nF capacitor, equivalent electric capacity is 250nF；It is tested neutral reactor rated capacity 329kvar, rated current
30A, the Ω of power frequency impedance value 412.49, inductance value are calculated as 1.313H.
By improving the frequency of out-put supply, to change the power output of whole reactive-load compensation capacitor, so as to realize string
Connection compensation capacitor and parallel capacitor each play the purpose of reactive-load compensation, and whole resistance to press fitting is calculated according to Circuit theory
It is 252.4Hz to put the loop resonance frequency formed in series compensation capacitor, parallel capacitor and test item.
As shown in figure 3, being the electrical test schematic diagram of the present invention, the electric current I of neutral reactor is flowed throughL：
；
The electric current I of parallel capacitor is flowed through under test voltageCCalculated：
；
Flow through the electric current I of series compensation capacitor and testing transformer2Calculated：
；
Drawn according to formula above three formula in the 60s of induced over voltage withstand test, the electric current for flowing through neutral reactor is
124A, and the electric current for flowing through series compensation capacitor and testing transformer is only 20A or so.If take usually used pure
Pure series resonant tank, the electric current for flowing through series compensation capacitor and testing transformer is up to 124A, seriously beyond examination
The rated current of transformer is tested, scene will be unable to realize；And if only the mode using parallel resonance, pass through the benefit of capacitor
Repay, the output current of testing transformer can be reduced, but the high-pressure side of testing transformer needs to export 260kV high voltage, if
It is too big to prepare the difficulty made, field test can not be applied to.The present invention by being transformed daily used pressurized system,
The mode being combined using connection in series-parallel realizes system resonance, has reached on the basis of existing equipment and has flowed through test item high voltage,
The purpose of high current.
To the equipment at scene：High-tension switch cabinet, variable-frequency power sources, testing transformer, series compensation capacitor, shunt compensation electricity
Container, neutral reactor and kilovoltmeter carry out wiring, carry out field test according to the result for calculating preview, detect reactance
The heat endurance and dynamic stability of device are satisfied by requiring.
Test method of the present invention is clear, and breaching conventional reactor induced over voltage withstand test, can not to carry out high voltage at the scene big
The bottleneck of current testing, make it possible that 1000kV extra-high voltages neutral reactor scene carries out inducting-voltage proof, filled up the country
The blank of live neutral reactor induced over voltage withstand test, the reliable and secure operation of extra-high voltage project is effectively ensured.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (6)
- A kind of 1. extra-high voltage neutral reactor scene induced voltage test, it is characterised in that：Comprise the following steps：1）Calculated according to field device parameters, prevent the excessive damage equipment of electric current, calculated by neutral reactor parameter Go out induced over voltage withstand test magnitude of voltage U, according to 80% pressure-resistant level calculation, i.e. U=UL* 0.8, ULNeutral reactor is represented to dispatch from the factory Pressure voltage；2）Electric current I to flowing through neutral reactor under test voltageLCalculated：；3）Electric current I to flowing through parallel capacitor under test voltageCCalculated：；4）Electric current I to flowing through series compensation capacitor and testing transformer2Calculated：；5）To electric current IC、I2Numerical value analyzed, the skill of parallel capacitor, series compensation capacitor and testing transformer Whether art parameter, which meets, requires;6) output of variable-frequency power sources high-frequency, centering point reactor, parallel capacitor, series compensation capacitor and examination are kept The size of current for testing transformer is analyzed, and whether the insulation examination of reactor has equivalence with power frequency during actual motion；7）Calculate preview to finish, field equipment connecting, frequency conversion experiment power supply output voltage, analysis calculates the heat of neutral reactor Whether stability and dynamic stability meet to require；8）Complete the live induced over voltage withstand test of neutral reactor；The extra-high voltage neutral reactor scene induced voltage test should including extra-high voltage neutral reactor presence Pressure test system, the extra-high voltage neutral reactor scene induced over voltage withstand test system include frequency conversion experiment power supply, experiment Transformer, compensation capacitor unit, tested article unit, the frequency conversion experiment power supply, testing transformer, compensation capacitor unit, Tested article unit is sequentially connected, and the tested article unit includes neutral reactor and ac voltage measurement unit, the neutrality Point reactor and ac voltage measurement unit are in parallel.
- 2. extra-high voltage neutral reactor scene induced voltage test as claimed in claim 1, it is characterised in that：It is described Testing transformer is exciting transformer.
- 3. the extra-high voltage neutral reactor scene induced voltage test described in claim 1, it is characterised in that：The benefit Repaying capacitor unit includes series compensation capacitor and parallel capacitor.
- 4. the extra-high voltage neutral reactor scene induced voltage test described in claim 3, it is characterised in that：The change Frequency experiment power supply, testing transformer, series compensation capacitor, neutral reactor are sequentially connected, the parallel capacitor It is in parallel with the neutral reactor.
- 5. the extra-high voltage neutral reactor scene induced voltage test described in claim 1, it is characterised in that：The change Frequency experiment power supply includes high-tension switch cabinet and variable-frequency power sources.
- 6. the extra-high voltage neutral reactor scene induced voltage test described in claim 1, it is characterised in that：The friendship Stream voltage measurement unit includes kilovoltmeter.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974290B (en) * | 2016-07-22 | 2018-12-04 | 国网河南省电力公司电力科学研究院 | A kind of dry-type air-core reactor turn-to-turn insulation performance detecting system and method |
| CN106501696B (en) * | 2016-10-19 | 2019-09-06 | 云南电网有限责任公司电力科学研究院 | A kind of 500kV high-voltage shunt reactor scene local discharge test system and method |
| CN106771911A (en) * | 2016-12-09 | 2017-05-31 | 广西电友科技发展有限公司 | A kind of elementary errors compensation industrial frequency withstand voltage experimental rig in parallel |
| CN109932578B (en) * | 2017-12-15 | 2024-04-02 | 广州西门子能源变压器有限公司 | Method and device for carrying out temperature rise test on transformer to be tested |
| CN109633386A (en) * | 2018-12-05 | 2019-04-16 | 国网甘肃省电力公司电力科学研究院 | A kind of extra-high voltage 1100kVGIS Field AC Withstand Voltage Test test method |
| CN110398674A (en) * | 2019-08-30 | 2019-11-01 | 国网山西省电力公司电力科学研究院 | A kind of extra-high voltage parallel reactance is pressure-resistant and local discharge test device |
| CN111650442B (en) * | 2020-06-11 | 2022-07-26 | 山东电力设备有限公司 | Test loop structure and test method for measuring loss of shunt reactor |
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| JP3432402B2 (en) * | 1997-10-29 | 2003-08-04 | 三菱電機株式会社 | Electrical equipment test equipment |
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| CN201611376U (en) * | 2010-03-05 | 2010-10-20 | 湖北省电力试验研究院 | Local alternative-current pressure test power supply device of a 1000kV alternative-current extra-high voltage switch device |
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