CN106501696A - A kind of 500kV high-voltage shunt reactors scene local discharge test system and method - Google Patents
A kind of 500kV high-voltage shunt reactors scene local discharge test system and method Download PDFInfo
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- CN106501696A CN106501696A CN201610911252.9A CN201610911252A CN106501696A CN 106501696 A CN106501696 A CN 106501696A CN 201610911252 A CN201610911252 A CN 201610911252A CN 106501696 A CN106501696 A CN 106501696A
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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 is with regard to a kind of 500kV high-voltage shunt reactors scene local discharge test system and method, constitutes test system using three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, the first capacitor, the second capacitor, the 3rd capacitor, checking of great current impedance, PD meter and wave arrestment reactor.The present invention accesses measurement Partial discharge signal with checking of great current impedance and wave arrestment reactor from compensation capacitor tail end using increasing, compared with the mode from the high anti-bottom shielding of bushing number of winning the confidence, the problem that serious, the true Partial discharge signal of Partial discharge signal decay is not collected can be effectively prevent；In addition, the present invention is by wave arrestment reactor, change inductance capacitance parameter in test loop, improve the verity of test loop Partial discharge signal signal to noise ratio and sampling.Said system is based on, the test method of the present invention breaches the situation that the country puts and pressure test voltage is limited at present with regard to the high anti-live offices of 500kV, and the high anti-turn-to-turn insulation performance before putting into operation to handing-over is effectively examined.
Description
Technical field
The present invention relates to electrical primary equipment high-potting art field in power system, more particularly to a kind of
500kV high-voltage shunt reactors scene local discharge test system and method.
Background technology
500kV high-voltage shunt reactors are one of important equipment in power system, and it can improve power-frequency voltage along the line
Distribution, limit value switching overvoltage and compensation system reactive power, therefore, its operating health status is related to entirely
System is stablized.
In prior art, there is provided on-Line Monitor Device is put in a kind of high anti-office, and the sampling of the device includes the signal of telecommunication (office
High-volume) and two parts of gas signal (oil chromatography).Wherein, when horizontal electrical signal sampling is entered, removed using differential balance method
Interference in the signal of telecommunication, Partial Discharge Measurement System are made up of narrow band system, and corresponding partial discharge pulse tuning filtering device has
One vibration output, continues several milliseconds.Most overall situation in detection each half period of power frequency of peak-reading voltmeter loop puts discharge pulse,
Store in a computer after each measured value digitized, then, peak detector reset, to record the data of half period,
Finally, according to office's high-volume measurement data result, judge the High-Voltage Insulation situation of reactor.But, reactor is deposited in operation
In stronger electromagnetic interference, office that on-Line Monitor Device can be measured that high-volume in contain the part that interference causes, so, no
Real office can be reflected inside reactor high-volume；Also, the above-mentioned method of sampling, does not carry out the high anti-local discharge test research in scene
To verify device measurement data verity in operation, the situation of high anti-internal insulation between coils is not further analyzed.
Therefore, realize that the magnitude of voltage for meeting handing-over code is required, and lifting test loop Partial discharge signal signal to noise ratio, to carrying out
500kV high-voltage shunt reactors scene office puts and pressure test is very necessary.
Content of the invention
For overcoming problem present in correlation technique, the present invention to provide a kind of 500kV high-voltage shunt reactors scene office and put
Pilot system and method.
A kind of first aspect according to embodiments of the present invention, there is provided 500kV high-voltage shunt reactors scene local discharge test system
System, the system include three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, the first capacitor, the second capacitor,
3rd capacitor, checking of great current impedance, PD meter and wave arrestment reactor, wherein：
The outfan of the three-phase alternating-current supply is electrically connected with one end of the switch, the other end of the switch with described
The input electrical connection of frequency changing power device, the outfan of the frequency changing power device are electric with the low-pressure side of the intermediate transformer
Connection, the high-pressure side live wire of the intermediate transformer are electrically connected with the side of first capacitor, first capacitor
Opposite side is connected with the input of tested shunt reactor, the outfan of the tested shunt reactor and the intermediate transformer
The electrical connection of high-pressure side zero line；
Second capacitor and the 3rd capacitor are in parallel with the tested shunt reactor respectively；
One end of the checking of great current impedance is exported with the tested shunt reactor is connected in second capacitor
One end electrical connection at end, other end ground connection, the PD meter are in parallel with the checking of great current impedance；
The input of the wave arrestment reactor is connected the tested shunt reactor outfan with the 3rd capacitor
One end electrical connection, output head grounding.
Preferably, first capacitor, second capacitor and the 3rd capacitor by rated voltage are
200kV, rated capacity are connected to be formed for three sub-capacitors of 90nF, are equipped with grading ring on three sub-capacitors.
Preferably, the applicable electric pressure of three grading rings is from the tested shunt reactor input to outfan
It is sequentially reduced.
Preferably, the opposite side of first capacitor passes through the input of high pressure expanded diameter conductor and tested shunt reactor
Connection, the line footpath of the high pressure expanded diameter conductor are more than or equal to 400mm2.
Preferably, second capacitor and the 3rd capacitor respectively by high pressure expanded diameter conductor with described tested simultaneously
Connection reactor is in parallel, and the line footpath of the high pressure expanded diameter conductor is more than or equal to 400mm2.
Preferably, electrically connected using cable between the three-phase alternating-current supply, the switch and frequency changing power device, described
The line footpath of cable is more than or equal to 120mm2.
Preferably, the system also includes potentiometer, the height of the side of the potentiometer and the tested shunt reactor
Pressure bottom shielding of bushing connection, opposite side ground connection.
Second aspect according to embodiments of the present invention, also provides a kind of 500kV high-voltage shunt reactors scene local discharge test
System and method, the system provided using embodiment of the present invention first aspect, including：
According to the principle of series resonant circuit, by condition of resonanceCalculate by capacitor and tested simultaneously
Resonant frequency f of the test loop of connection reactor composition, wherein, L is the tested shunt reactor and the second capacitor and the
The equivalent inductance of three capacitors, C1Capacitance for the first capacitor；
Experiment with measuring voltage and pre- making alive are put according to office, electric current, the Yi Jisuo of the tested shunt reactor is calculated
The compensation electric current of the second capacitor and the 3rd capacitor is stated, wherein, the office puts experiment with measuring voltage and isDescribed
Pre- making alive isThe highest operating voltage of tested shunt reactor described in Um；
The compensation electric current that the electric current of the tested shunt reactor is deducted second capacitor and the 3rd capacitor, obtains
High-pressure side output current to intermediate transformer；
According to the no-load voltage ratio of the intermediate transformer, calculate in frequency changing power device and experiment with measuring voltage pair is put with the office
Experiment with measuring electric current and pre-add electric current corresponding with the pre- making alive are put in the office that answers；
According to pressurization sequence, adjust the frequency changing power device output office and put experiment with measuring electric current and the pre- power-up
Stream, and value is put in the office for testing tested shunt reactor described in each pressure period by PD meter.
Preferably, methods described also includes：
Before carrying out office and putting test, at the end shield of high-voltage bushing of the tested shunt reactor, connect potentiometer；
System voltage check is carried out using the potentiometer.
From above technical scheme, examination is put in the 500kV high-voltage shunt reactors scene office that embodiments of the invention are provided
Check system and method, using three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, the first capacitor, the second electricity
The test system that container, the 3rd capacitor, checking of great current impedance, PD meter and wave arrestment reactor are constituted.The embodiment of the present invention
In, one end of checking of great current impedance electrically connected with the one end for being connected tested shunt reactor outfan in the second capacitor, another
One end is grounded, and PD meter is in parallel with checking of great current impedance, the embodiment of the present invention using using increasing match somebody with somebody checking of great current impedance and
Wave arrestment reactor accesses measurement Partial discharge signal from compensation capacitor tail end, and of the prior art, wins the confidence from high anti-bottom shielding of bushing
Number mode compare, Partial discharge signal can be effectively prevent and decayed the problem that serious, true Partial discharge signal do not collect；In addition,
The input of wave arrestment reactor be connected in the 3rd capacitor tested shunt reactor outfan one end electrically connect,
Output head grounding, the present embodiment improve test loop Partial discharge signal noise by changing inductance capacitance parameter in test loop
Than and sampling verity.Said system is based on, the test method that the present embodiment is provided breaches the feelings of test voltage restriction
Condition, the high anti-turn-to-turn insulation performance before putting into operation to handing-over are effectively examined.
It should be appreciated that above general description and detailed description hereinafter are only exemplary and explanatory, not
The present invention can be limited.
Description of the drawings
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement for meeting the present invention
Example, and the principle for being used for explaining the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of the basic of 500kV high-voltage shunt reactors scene local discharge test system provided in an embodiment of the present invention
Structural representation；
Fig. 2 is a kind of test of 500kV high-voltage shunt reactors scene local discharge test system provided in an embodiment of the present invention
Loop equivalent circuit diagram.
Specific embodiment
Here in detail exemplary embodiment will be illustrated, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with as appended by
The example of consistent apparatus and method in terms of some being described in detail in claims, of the invention.
Referring to Fig. 1, it is a kind of 500kV high-voltage shunt reactors scene local discharge test system provided in an embodiment of the present invention
Basic structure schematic diagram.The system includes three-phase alternating-current supply 1, switch 2, frequency changing power device 3, the 4, first electricity of intermediate transformer
Container 5, the second capacitor 6, the 3rd capacitor 7, checking of great current impedance 8, PD meter 9 and wave arrestment reactor 10.
In conjunction with the high anti-plans that have a power failure of 500kV in transformer station, the pilot system constituted using said apparatus just can be to high anti-
(capacity is in the range of 40000～70000kvar) carries out live office and puts and pressure test, and wherein, the connection of above-mentioned each device is closed
System and parameter are as follows：
Three-phase alternating-current supply 1, is that scene can be become using station not less than the power frequency of 300kVA capacity (50Hz) 380V power supplys
Depressor or emergency power generation vehicle, and corresponding earth leakage protective is equipped with, safe and reliable input power is provided for test system.The three-phase
Alternating current power supply 1 is not less than 120mm by three line footpaths2Cable is connected with one end of switch 2, and wherein, this enforcement breaker in middle 2 is selected
High current (630A) air switch, realizes connecting or breaking test power supply by operating absolutely empty air cock, provides for testing ground
Reliable source of power breakpoint, ensures field test safety.
Switch 2 is not less than 120mm by three line footpaths2Cable is electrically connected with the input of frequency changing power device 3, wherein,
3 input/output rated voltage of frequency changing power device is respectively 380V/350V, by frequency changing power device 3 realize output voltage with
Anticipate adjustable (0～350V), and then frequency conversion (20～300Hz) electricity can be provided for 500kV high-voltage shunt reactors scene local discharge test
Source.
The outfan of frequency changing power device 3 is not less than 120mm by both threads footpath2Cable 14 is low with intermediate transformer 4
The electrical connection of pressure side, wherein, intermediate transformer 4 can select rated capacity 200kVA, and its low pressure input has 350V and 400V two
Gear may be selected, and High voltage output has two gears of 6kV and 8kV may be selected, and then can provide high-voltage test electric power.
The high-pressure side live wire of intermediate transformer 4 is not less than 8mm by single line footpath25 tail end of cable and the first capacitor
Side electrically connects, and the opposite side of the first capacitor 5 is not less than 400mm by line footpath2High pressure expanded diameter conductor and tested in parallel electricity
The input connection of anti-device 11, the outfan of tested shunt reactor 11 are not less than 8mm by single line footpath2Cable and middle anaplasia
The high-pressure side zero line electrical connection of depressor 4.
Wherein, the first capacitor 5 saves by three that (in FIG, numbering is a, c) b, rated voltage 200kV, specified from top to bottom
The sub-capacitor of capacity 90nF is in series, and its assembling mode is upper and lower closed assembly, most goes up knot capacitor a head ends and passes through line footpath not
It is less than 400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form series resonant tank, and in order to eliminate under high voltage
Capacitor connecting portion corona is disturbed, and at three section of upper, middle and lower is respectively configured 600kV grading rings one, 400kV grading rings one
Individual, 200kV grading rings one.
Second capacitor 6 and the 3rd capacitor 7 are in parallel with tested shunt reactor 11 respectively, using 6 He of the second capacitor
3rd capacitor 7 forms shunt compensation loop with tested shunt reactor 11.
Wherein, shnt capacitor 6, by three sections, (in FIG, numbering is d, f) e, rated voltage 200kV, volume from top to bottom
The sub-capacitor of constant volume 90nF is in series, and its assembling mode is upper and lower closed assembly, most goes up knot capacitor d head ends by line footpath
It is not less than 400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form shunt compensation loop, and in order to eliminate high voltage
Lower capacitor connecting portion corona interference, is respectively configured 600kV grading rings one, 400kV grading rings at three section of upper, middle and lower
One, 200kV grading rings one.
Shnt capacitor 7, by three sections, (in FIG, numbering is g, i) h, rated voltage 200kV, rated capacity from top to bottom
The sub-capacitor of 90nF is in series, and its assembling mode is upper and lower closed assembly, most goes up knot capacitor g head ends and is not less than by line footpath
400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form shunt compensation loop, and in order to eliminate electric capacity under high voltage
Device connecting portion corona disturb, be respectively configured at three section of upper, middle and lower 600kV grading rings one, 400kV grading rings one,
200kV grading rings one.
One end of checking of great current impedance 8 and the one end for being connected 11 outfan of tested shunt reactor in the second capacitor 6
Electrical connection, other end ground connection, PD meter 9 are in parallel with checking of great current impedance 8；The input of wave arrestment reactor 10 and the 3rd electric capacity
Connect one end electrical connection, the output head grounding of 11 outfan of tested shunt reactor in device 7.
The embodiment of the present invention is using being connect from compensation capacitor tail end with checking of great current impedance and wave arrestment reactor using increasing
Enter to measure Partial discharge signal, and of the prior art, compare from the mode of the high anti-bottom shielding of bushing number of winning the confidence, office can be effectively prevent
The problem that serious, the true Partial discharge signal of discharge signal decay is not collected；In addition, the input of wave arrestment reactor and the described 3rd electricity
Connect one end electrical connection, the output head grounding of the tested shunt reactor outfan in container, the present embodiment is tried by changing
Inductance capacitance parameter in loop is tested, the verity of test loop Partial discharge signal signal to noise ratio and sampling is improved.
Further, check to realize the voltage to above-mentioned experimental system, the system also includes potentiometer, potentiometer
Side be connected with the end shield of high-voltage bushing of the tested shunt reactor 11, opposite side ground connection.After voltage has been checked, just can be with
The potentiometer is removed from experimental system, and then impact of the voltage divider capacitance to resonant tank can be avoided.
Using above-mentioned experimental system, the embodiment of the present invention additionally provides a kind of 500kV high-voltage shunt reactors scene office and puts
Test method.
The present embodiment is carried out to the test method of the present embodiment by taking the shunt reactor of individual capacity 60000kvar as an example
It is discussed in detail, the method specifically includes following steps：
Wherein, the main name plate information of testing equipment is simply listed in table 1～4.
Table one：The main nameplate parameter of tested shunt reactor
| Model | BKDF-60000/550/110 | Rated capacity | 60000kvar |
| Rated voltage | 550/√3kV | Rated current | 188.95A |
| Rated frequency | 50Hz | Rated impedance | 1686.17Ω |
Table two：The main nameplate parameter of sub-capacitor
| Model | BAM200-90000 | Rated capacity | 90000pF |
| Rated voltage | 200kV | Office is high-volume | ＜ 10pC under 0.8Un |
Table three：The main nameplate parameter of intermediate transformer
| Model | YDW-200/6/8/0.35/0.4 | Rated capacity | 200kVA |
| Rated voltage | 8/6kV | Office is high-volume | ＜ 10pC under Un |
Table four：The main nameplate parameter of frequency changing power device
| Model | HVFS-300 | Rated capacity | 300kW |
| Output voltage | 0～350V | Output current | 0～875A |
| Frequency range | 20～300Hz | Office is high-volume | Under Un≤10pC |
S110：According to the principle of series resonant circuit, by condition of resonanceCalculate by capacitor and
Resonant frequency f of the test loop of tested shunt reactor composition.
As indicated with 2, be said system test loop equivalent circuit diagram, wherein, C1For the electric capacity of the first capacitor, C2For
Second capacitor and the equivalent capacity of the 3rd capacitor, L1For the inductance of tested shunt reactor, L0Electricity for intermediate transformer
Sense.
In due to the present embodiment, sub-capacitor string of the first capacitor to the 3rd capacitor by three section rated capacities 90nF
Connection is formed, so C1And C2Capacitance be：
According to the nameplate parameter of tested shunt reactor, device inductance value L can be calculated1For:
According to the principle of series resonant circuit, by condition of resonanceAbove-mentioned experimental loop resonance can be obtained
Frequency f, L are the equivalent inductance of tested reactor and shnt capacitor.
Drawn according to formula (4),
By C1、C2And L1Occurrence substitute in formula (5), resonant frequency f can be calculated for 229.05Hz.
S120：Experiment with measuring voltage and pre- making alive are put according to office, calculate the tested shunt reactor electric current, with
And the compensation electric current of second capacitor and the 3rd capacitor.
Wherein, the office puts experiment with measuring voltage and isThe pre- making alive isQuilt described in Um
Survey the highest operating voltage of shunt reactor.
S130：The compensation electricity that the electric current of the tested shunt reactor is deducted second capacitor and the 3rd capacitor
Stream, obtains the high-pressure side output current of intermediate transformer.
S140：According to the no-load voltage ratio of the intermediate transformer, calculate in frequency changing power device and experiment with measuring is put with the office
Experiment with measuring electric current and pre-add electric current corresponding with the pre- making alive are put in the corresponding office of voltage.
When the pre- making alive of tested shunt reactor isWhen, the electric current of tested shunt reactor is：
Equivalent parallel capacitor C2Compensation electric current be：
IC2=ω C2Um=2*3.14*229.05*0.06*539.8*10-3=46.58A
Intermediate transformer output current is：
IL0=IL-IC2=23.3A
Two kinds of no-load voltage ratios are selected to calculate intermediate transformer：
A), when transformer voltage ratio is 20, intermediate transformer low-pressure side and frequency changing power device output current are：
IFrequency conversion=23.3*20A=466A
B), when transformer voltage ratio is 17.14, intermediate transformer low-pressure side and frequency changing power device output current are：
IFrequency conversion=23.3*17.14A=399.36A
According to feed cable according to every mm24A is born, selects (a) to plant under no-load voltage ratio, supply unit output cable is at least
120mm2, cable that therefore the present embodiment is selected can meet above-mentioned output current and require.
Likewise, can obtainWithUnder, intermediate transformer low-pressure side and frequency changing power device
Output current.
S150：According to pressurization sequence, adjust the frequency changing power device and export the office and put experiment with measuring electric current and described
Pre-add electric current, and value is put in the office for testing tested shunt reactor described in each pressure period by PD meter.
In the present embodiment, the voltage that anti-device high to tested parallel connection applies includes
With
In the whole period for applying test voltage, the shelf depreciation of the high anti-device of tested parallel connection should be monitored by following methods：
1) the frequency changing power device output current value is adjusted, according to U1、U2And U3Boosting pressurized in sequence.
In applied voltage U1Short time in, do not require read PD meter discharge capacity discharge waveform but should observe；Applying
Making alive U2And U3In, reading office should put and be worth and record reading respectively.
2) the frequency changing power device output current value is adjusted, according to U3、U2And U1Blood pressure lowering pressurized in sequence.
In applied voltage U2During whole, should continuously observe and a shelf depreciation be recorded by every 5min time intervals
Level；In applied voltage U3During whole, should continuously observe, read and value is put in the office of record；In applied voltage U1Short time
Interior, do not require to read the discharge capacity discharge waveform of PD meter but should observe.
If in the observation process of above-mentioned shelf depreciation, test voltage does not produce decline suddenly, and is applying test electricity
In pressure 60min, the continuous horizontal of the Apparent discharge magnitude in all measurement terminal, less than the limit value (500pC) of regulation, then test is
Qualified；
If within a period of time, the reading of Apparent discharge magnitude exceedes the limit value of regulation, but is less than this limit value again afterwards,
Then test need not be interrupted still being carried out continuously, during 60min thereafter in obtain acceptable reading till.Accidentally go out
Existing higher pulse is negligible.
According to testing conditions, to test result analysis, wherein, meet and test phase, partial discharge quantity satisfaction rule are put in office
Range request, and test voltage do not produced when suddenly declining two conditions, then judge that tested PD meter in parallel is qualified.
For improving test accuracy, methods described also includes：Before carrying out office and putting test, in the tested shunt reactor
End shield of high-voltage bushing at connect potentiometer, using the potentiometer, enter from tested shunt reactor high-pressure side injection standard block
Row system voltage is checked.
Further, before carrying out office and putting test, can also comprise the steps：
A) guarantee that short circuit is grounded tested high anti-current transformer secondary terminals；
B) Gao Kangxu completes whole routine tests and oil test, and including insulating oil chromatography test, conclusion is qualified；
C) more than 72 hours must be stood after high anti-vacuum oil；
D) bleed off at each side casing flange, the gas of radiator top etc. deposition.
From above technical scheme, the 500kV high-voltage shunt reactors scene local discharge test system that the present embodiment is provided
I.e. method, after Theoretical Calculation, testing equipment type selecting, parameter configuration and field test are detected, can achieve handing-over regulatory requirements
(experiment with measuring voltage is put to value in officePre- making alive is) test that specifies, it is achieved that to high anti-circle
Between insulating properties abundant examination, further strengthen the detection of anti-turn-to-turn insulation performance high to 500kV, lift high anti-networking
Testing inspection ability.
Those skilled in the art will readily occur to its of the present invention after the invention that consideration description and practice are invented here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
The common knowledge in the art that person's adaptations follow the general principle of the present invention and do not invent including the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And various modifications and changes can carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (9)
1. a kind of 500kV high-voltage shunt reactors scene local discharge test system, it is characterised in that including three-phase alternating-current supply (1),
Switch (2), frequency changing power device (3), intermediate transformer (4), the first capacitor (5), the second capacitor (6), the 3rd capacitor
(7), checking of great current impedance (8), PD meter (9) and wave arrestment reactor (10), wherein：
The outfan of three-phase alternating-current supply (1) is electrically connected with one end of the switch (2), the other end of switch (2)
Electrically connect with the input of the frequency changing power device (3), the outfan of frequency changing power device (3) and the middle transformation
The low-pressure side electrical connection of device (4), the high-pressure side live wire of intermediate transformer (4) are electric with the side of the first capacitor (5)
Connection, the opposite side of the first capacitor (5) are connected with the input of tested shunt reactor (11), the tested electricity in parallel
The outfan of anti-device (11) is electrically connected with the high-pressure side zero line of the intermediate transformer (4)；
Second capacitor (6) and the 3rd capacitor (7) are in parallel with tested shunt reactor (11) respectively；
The one end of checking of great current impedance (8) is connected the tested shunt reactor with the second capacitor (6)
(11) one end electrical connection of outfan, other end ground connection, PD meter (9) are in parallel with checking of great current impedance (8)；
The input of wave arrestment reactor (10) is connected tested shunt reactor (11) with the 3rd capacitor (7)
One end electrical connection of outfan, output head grounding.
2. 500kV high-voltage shunt reactors according to claim 1 scene local discharge test system, it is characterised in that described
First capacitor (5), second capacitor (6) and the 3rd capacitor (6) are 200kV, specified appearance by rated voltage
Measure three sub-capacitors for 90nF to connect to be formed, on three sub-capacitors, be equipped with grading ring.
3. 500kV high-voltage shunt reactors according to claim 2 scene local discharge test system, it is characterised in that three
The applicable electric pressure of the grading ring is sequentially reduced from tested shunt reactor (11) input to outfan.
4. 500kV high-voltage shunt reactors according to claim 1 scene local discharge test system, it is characterised in that described
The opposite side of the first capacitor (5) is connected with the input of tested shunt reactor (11) by high pressure expanded diameter conductor, the height
The line footpath of pressure expanded diameter conductor is more than or equal to 400mm2.
5. the live local discharge test system of 500kV high-voltage shunt reactors according to claim 1 or 4, it is characterised in that institute
The second capacitor (6) and the 3rd capacitor (6) are stated respectively by high pressure expanded diameter conductor and the tested shunt reactor
(11) in parallel, the line footpath of the high pressure expanded diameter conductor is more than or equal to 400mm2.
6. 500kV high-voltage shunt reactors according to claim 1 scene local discharge test system, it is characterised in that described
Electrically connected using cable between three-phase alternating-current supply (1), the switch (2) and frequency changing power device (3), the line footpath of the cable
It is more than or equal to 120mm2.
7. 500kV high-voltage shunt reactors according to claim 1 scene local discharge test system, it is characterised in that described
System also includes potentiometer, the side of the potentiometer is connected with the end shield of high-voltage bushing of tested shunt reactor (11),
Opposite side is grounded.
8. a kind of 500kV high-voltage shunt reactors scene local discharge test method, using the arbitrary described system of claim 1 to 7,
Characterized in that, including：
According to the principle of series resonant circuit, by condition of resonanceCalculate by capacitor and tested electricity in parallel
Resonant frequency f of the test loop of anti-device composition, wherein, L is the tested shunt reactor and the second capacitor and the 3rd electricity
The equivalent inductance of container, C1Capacitance for the first capacitor；
Experiment with measuring voltage and pre- making alive are put according to office, the electric current and described of the tested shunt reactor is calculated
Two capacitors and the compensation electric current of the 3rd capacitor, wherein, the office puts experiment with measuring voltage and isThe pre-add
Voltage isThe highest operating voltage of tested shunt reactor described in Um；
The compensation electric current that the electric current of the tested shunt reactor is deducted second capacitor and the 3rd capacitor, in obtaining
Between transformator high-pressure side output current；
According to the no-load voltage ratio of the intermediate transformer, calculate that experiment with measuring voltage to be put with the office in frequency changing power device corresponding
Experiment with measuring electric current and pre-add electric current corresponding with the pre- making alive are put in office；
According to pressurization sequence, adjust the frequency changing power device output office and put experiment with measuring electric current and the pre-add electric current,
And value is put in the office for testing tested shunt reactor described in each pressure period by PD meter.
9. 500kV high-voltage shunt reactors according to claim 8 scene local discharge test method, it is characterised in that described
Method also includes：
Before carrying out office and putting test, at the end shield of high-voltage bushing of the tested shunt reactor, connect potentiometer；
System voltage check is carried out using the potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911252.9A CN106501696B (en) | 2016-10-19 | 2016-10-19 | A kind of 500kV high-voltage shunt reactor scene local discharge test system and method |
Applications Claiming Priority (1)
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