CN106501696B - A kind of 500kV high-voltage shunt reactor scene local discharge test system and method - Google Patents
A kind of 500kV high-voltage shunt reactor scene local discharge test system and method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
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Abstract
The present invention relates to a kind of 500kV high-voltage shunt reactor scene local discharge test system and methods, constitute test macro using three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, first capacitor device, the second capacitor, third capacitor, checking of great current impedance, PD meter and wave arrestment reactor.The present invention accesses measurement Partial discharge signal from compensation capacitor tail end with checking of great current impedance and wave arrestment reactor using increasing, compared with the mode from the highly resistance bottom shielding of bushing number of winning the confidence, the problem of serious, true Partial discharge signal does not acquire it is possible to prevente effectively from Partial discharge signal is decayed；In addition, the present invention changes inductance capacitance parameter in test loop, improves the authenticity of test loop Partial discharge signal signal-to-noise ratio and sampling by wave arrestment reactor.Based on above system, test method of the invention breaches current country 500kV highly resistance scene partial discharge and the case where pressure test voltage limits, is effectively examined to the highly resistance turn-to-turn insulation performance joined before putting into operation.
Description
Technical field
The present invention relates to electrical primary equipment high-potting field technical fields in electric system, more particularly to one kind
500kV high-voltage shunt reactor scene local discharge test system and method.
Background technique
500kV high-voltage shunt reactor is one of equipment important in electric system, it can improve along power-frequency voltage
Distribution, limit value switching overvoltage and compensation system reactive power, therefore, running health status is related to entirely
The stabilization of system.
In the prior art, a kind of partial discharge on-Line Monitor Device of highly resistance is provided, the sampling of the device includes electric signal (office
High-volume) and two parts of gas signal (oil chromatography).Wherein, when carrying out electric signal sampling, removed using differential balance method
Interference in electric signal, Partial Discharge Measurement System are made of narrow band system, and corresponding partial discharge pulse's tuned filter has
One oscillation output, continues several milliseconds.The maximum partial discharge discharge pulse in power frequency each half period is detected in peak-reading voltmeter circuit,
It is stored in a computer after each measured value digitlization, then, peak detector reset, the data to record half period,
Finally, according to partial discharge amount measurement data as a result, high-voltage isulation situation to judge reactor.But reactor is deposited in operation
In stronger electromagnetic interference, part caused by interference is contained in the partial discharge amount that on-Line Monitor Device can be measured that, so, no
True partial discharge amount inside reactor can be reflected；Also, the above-mentioned method of sampling does not carry out live highly resistance local discharge test research
Come the case where verifying device measurement data authenticity in operation, not analyzing insulation between coils inside highly resistance further.
Therefore, the voltage value requirement for meeting handover regulation, and lifting test circuit Partial discharge signal signal-to-noise ratio are realized, to development
500kV high-voltage shunt reactor scene partial discharge and pressure test are very necessary.
Summary of the invention
To overcome the problems in correlation technique, the present invention provides a kind of 500kV high-voltage shunt reactor scene partial discharge
Pilot system and method.
According to a first aspect of the embodiments of the present invention, a kind of 500kV high-voltage shunt reactor scene local discharge test system is provided
System, the system include three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, first capacitor device, the second capacitor,
Third capacitor, checking of great current impedance, PD meter and wave arrestment reactor, in which:
The output end of the three-phase alternating-current supply is electrically connected with one end of the switch, the other end of the switch with it is described
The input terminal of frequency changing power device is electrically connected, the low-pressure side electricity of the output end of the frequency changing power device and the intermediate transformer
Connection, the high-pressure side firewire of the intermediate transformer are electrically connected with the side of the first capacitor device, the first capacitor device
The other side is connect with the input terminal of tested shunt reactor, the output end and the intermediate transformer of the tested shunt reactor
High-pressure side zero curve electrical connection；
Second capacitor and the third capacitor are in parallel with the tested shunt reactor respectively；
The tested shunt reactor is connected in one end of the checking of great current impedance and second capacitor to export
One end electrical connection at end, other end ground connection, the PD meter are in parallel with the checking of great current impedance；
The tested shunt reactor output end is connected in the input terminal of the wave arrestment reactor and the third capacitor
One end electrical connection, output end ground connection.
Preferably, the first capacitor device, second capacitor and the third capacitor are by voltage rating
200kV, three sub-capacitors that rated capacity is 90nF connect to be formed, and are equipped with grading ring on three sub-capacitors.
Preferably, the applicable voltage class of three grading rings is from the tested shunt reactor input terminal to output end
It is sequentially reduced.
Preferably, the other side of the first capacitor device passes through the input terminal of high pressure expanded diameter conductor and tested shunt reactor
The line footpath of connection, the high pressure expanded diameter conductor is more than or equal to 400mm2。
Preferably, second capacitor and the third capacitor pass through high pressure expanded diameter conductor respectively and are tested simultaneously with described
Join reactor parallel connection, the line footpath of the high pressure expanded diameter conductor is more than or equal to 400mm2。
Preferably, it is electrically connected between the three-phase alternating-current supply, the switch and frequency changing power device using cable, it is described
The line footpath of cable is more than or equal to 120mm2。
Preferably, the system also includes divider, the height of the side of the divider and the tested shunt reactor
Press bottom shielding of bushing connection, other side ground connection.
According to a second aspect of the embodiments of the present invention, a kind of 500kV high-voltage shunt reactor scene local discharge test is also provided
System and method, the system provided using first aspect of the embodiment of the present invention, comprising:
According to the principle of series resonant circuit, by condition of resonanceIt calculates by capacitor and is tested
The resonance frequency f of the test loop of shunt reactor composition, wherein L be the tested shunt reactor and the second capacitor and
The equivalent inductance of third capacitor, C1For the capacitance of first capacitor device；
Test voltage and pre- making alive are measured according to partial discharge, calculates electric current, the Yi Jisuo of the tested shunt reactor
State the compensation electric current of the second capacitor and third capacitor, wherein the partial discharge measures test voltage and isIt is described
Pre- making alive isThe highest operating voltage of shunt reactor is tested described in Um；
The compensation electric current that the electric current of the tested shunt reactor is subtracted to second capacitor and third capacitor, obtains
Electric current is exported to the high-pressure side of intermediate transformer；
According to the no-load voltage ratio of the intermediate transformer, calculates in frequency changing power device and measure test voltage pair with the partial discharge
The partial discharge measurement test current and pre-add electric current corresponding with the pre- making alive answered；
According to pressurization sequence, adjusts the frequency changing power device and export the partial discharge measurement test current and the pre- power-up
Stream, and the partial discharge value that shunt reactor is tested described in each pressure period is tested by PD meter.
Preferably, the method also includes:
Before carrying out partial discharge test, divider is connected at the end shield of high-voltage bushing of the tested shunt reactor；
System voltage check is carried out using the divider.
By above technical scheme as it can be seen that the 500kV high-voltage shunt reactor scene partial discharge examination that the embodiment of the present invention provides
Check system and method utilize three-phase alternating-current supply, switch, frequency changing power device, intermediate transformer, first capacitor device, the second electricity
The test macro that container, third 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 is electrically connected with the one end for connecting tested shunt reactor output end in the second capacitor, is another
One end ground connection, PD meter is in parallel with checking of great current impedance, the embodiment of the present invention use using increasing match checking of great current impedance and
Wave arrestment reactor accesses measurement Partial discharge signal from compensation capacitor tail end, and in the prior art, wins the confidence from highly resistance bottom shielding of bushing
Number mode compare, the problem of serious, true Partial discharge signal does not acquire it is possible to prevente effectively from Partial discharge signal is decayed；In addition,
The one end for connecting the tested shunt reactor output end in the input terminal of wave arrestment reactor and the third capacitor is electrically connected,
Output end ground connection, the present embodiment improve test loop Partial discharge signal noise by changing inductance capacitance parameter in test loop
Than and sampling authenticity.Based on above system, test method provided in this embodiment breaches the feelings of test voltage limitation
Condition, the highly resistance turn-to-turn insulation performance before putting into operation to handover are effectively examined.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of the basic of 500kV high-voltage shunt reactor scene provided in an embodiment of the present invention local discharge test system
Structural schematic diagram；
Fig. 2 is a kind of test of 500kV high-voltage shunt reactor scene provided in an embodiment of the present invention local discharge test system
Circuit equivalent circuit diagram.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
It is a kind of 500kV high-voltage shunt reactor scene provided in an embodiment of the present invention local discharge test system referring to Fig. 1
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, third capacitor 7, checking of great current impedance 8, PD meter 9 and wave arrestment reactor 10.
Having a power failure plan in conjunction with 500kV highly resistance in substation can be to highly resistance using the pilot system of above-mentioned apparatus composition
(capacity is within the scope of 40000~70000kvar) carries out live partial discharge and pressure test, wherein the connection of above-mentioned each device is closed
System and parameter are as follows:
Three-phase alternating-current supply 1, for power frequency (50Hz) 380V power supply not less than 300kVA capacity, station change is can be used in scene
Depressor or emergency power generation vehicle, and it is equipped with corresponding earth leakage protective, safe and reliable input power is provided for test macro.The three-phase
AC power source 1 is not less than 120mm by three line footpaths2Cable is connect with one end of switch 2, wherein switch 2 is selected in this implementation
High current (630A) air switch is realized connection or breaking test power supply by operating absolutely empty air cock, is provided 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 terminal of frequency changing power device 3, wherein
3 input/output voltage rating 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 reactor scene local discharge test
Source.
The output end of frequency changing power device 3 is not less than 120mm by both threads diameter2Cable 14 is low with intermediate transformer 4
Press side electrical connection, wherein intermediate transformer 4 can select rated capacity 200kVA, and 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 firewire of intermediate transformer 4 is not less than 8mm by single line diameter2Cable and 5 tail end of first capacitor device
The other side of side electrical connection, first capacitor device 5 is not less than 400mm by line footpath2High pressure expanded diameter conductor with it is tested in parallel electric
The input terminal of anti-device 11 connects, and the output end for being tested shunt reactor 11 is not less than 8mm by single line diameter2Cable and intermediate change
The high-pressure side zero curve of depressor 4 is electrically connected.
Wherein, by three sections, (in Fig. 1, number is a, b, c) voltage rating 200kV, specified to first capacitor device 5 from top to bottom
The sub-capacitor of capacity 90nF is connected in series, and assembling mode is upper and lower closed assembly, and most upper knot capacitor a head end passes through line footpath not
Lower than 400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form series resonant tank, and in order to eliminate under high voltage
The interference of capacitor connecting portion corona, is respectively configured 600kV grading ring one, 400kV grading ring one at three section of upper, middle and lower
It is a, 200kV grading ring one.
Second capacitor 6 and third capacitor 7 are in parallel with tested shunt reactor 11 respectively, utilize 6 He of the second capacitor
Third capacitor 7 and tested shunt reactor 11 form shunt compensation circuit.
Wherein, shunt capacitor 6, (in Fig. 1, number is d, e, f) voltage rating 200kV, volume to You Sanjie from top to bottom
The sub-capacitor of constant volume 90nF is connected in series, and assembling mode is upper and lower closed assembly, and most upper knot capacitor d head end passes through line footpath
Not less than 400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form shunt compensation circuit, and in order to eliminate high voltage
Lower capacitor connecting portion corona interference, is respectively configured 600kV grading ring one, 400kV grading ring at three section of upper, middle and lower
One, 200kV grading ring one.
Shunt capacitor 7, (in Fig. 1, number is g, h, i) voltage rating 200kV, rated capacity to You Sanjie from top to bottom
The sub-capacitor of 90nF is connected in series, and assembling mode is upper and lower closed assembly, and most upper knot capacitor g head end is not less than by line footpath
400mm2High pressure expanded diameter conductor and tested shunt reactor 11 form shunt compensation circuit, and in order to eliminate capacitor under high voltage
Device connecting portion corona interference, be respectively configured at three section of upper, middle and lower 600kV grading ring one, 400kV grading ring one,
200kV grading ring one.
One end of tested 11 output end of shunt reactor is connected in one end of checking of great current impedance 8 and 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 terminal and third capacitor of wave arrestment reactor 10
One end electrical connection, the output end ground connection of 11 output end of tested shunt reactor are connected in device 7.
The embodiment of the present invention is used to be connect with checking of great current impedance and wave arrestment reactor from compensation capacitor tail end using increasing
Enter to measure Partial discharge signal, and it is in the prior art, it is compared from the mode of the highly resistance bottom shielding of bushing number of winning the confidence, it is possible to prevente effectively from office
Not the problem of serious, the true Partial discharge signal of discharge signal decaying does not acquire；In addition, the input terminal of wave arrestment reactor and third electricity
One end electrical connection, the output end ground connection of the tested shunt reactor output end are connected in container, the present embodiment is by changing examination
Inductance capacitance parameter in circuit is tested, the authenticity of test loop Partial discharge signal signal-to-noise ratio and sampling is improved.
Further, in order to realize the voltage check to above-mentioned experimental system, the system also includes divider, divider
Side connect with the end shield of high-voltage bushing of the tested shunt reactor 11, the other side ground connection.It, can after voltage has been checked
The divider is removed from experimental system, and then can influence to avoid voltage divider capacitance to resonant tank.
Using above-mentioned experimental system, the embodiment of the invention also provides a kind of 500kV high-voltage shunt reactor scene partial discharges
Test method.
The present embodiment carries out the test method of the present embodiment by taking the shunt reactor of individual capacity 60000kvar as an example
It is discussed in detail, this method specifically comprises the 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 |
| Voltage rating | 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 |
| Voltage rating | 200kV | Partial discharge amount | < 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 |
| Voltage rating | 8/6kV | Partial discharge amount | < 10pC under Un |
Table four: the main nameplate parameter of frequency changing power device
| Model | HVFS-300 | Rated capacity | 300kW |
| Output voltage | 0~350V | Export electric current | 0~875A |
| Frequency range | 20~300Hz | Partial discharge amount | Under Un≤10pC |
S110: according to the principle of series resonant circuit, by condition of resonanceCalculate by capacitor and
The resonance frequency f of the test loop of tested shunt reactor composition.
It as indicated with 2, is the test loop equivalent circuit diagram of above system, wherein C1For the capacitor of first capacitor device, C2For
The equivalent capacity of second capacitor and third capacitor, L1For the inductance for being tested shunt reactor, L0For the electricity of intermediate transformer
Sense.
By in this present embodiment, first capacitor device to third capacitor by three section rated capacity 90nF sub-capacitor string
Join, so C1And C2Capacitance are as follows:
According to the nameplate parameter of tested shunt reactor, device inductance L can be calculated1Are as follows:
According to the principle of series resonant circuit, by condition of resonanceIt is humorous that above-mentioned experimental loop can be found out
Vibration frequency f, L are the equivalent inductance for being tested reactor and shunt capacitor.
It is obtained according to formula (4),
By C1、C2And L1Occurrence substitute into formula (5) in, can calculate resonance frequency f be 229.05Hz.
S120: measuring test voltage and pre- making alive according to partial discharge, calculate the tested shunt reactor electric current, with
And the compensation electric current of second capacitor and third capacitor.
Wherein, the partial discharge measurement test voltage isThe pre- making alive isQuilt described in Um
Survey the highest operating voltage of shunt reactor.
S130: the electric current of the tested shunt reactor is subtracted to the compensation electricity of second capacitor and third capacitor
Stream obtains the high-pressure side output electric current of intermediate transformer.
S140: it according to the no-load voltage ratio of the intermediate transformer, calculates to measure in frequency changing power device with the partial discharge and test
Voltage corresponding partial discharge measurement test current and pre-add electric current corresponding with the pre- making alive.
When the pre- making alive of tested shunt reactor isWhen, it is tested the electric current of shunt reactor are as follows:
Equivalent parallel capacitor C2Compensation electric current are as follows:
IC2=ω C2Um=2*3.14*229.05*0.06*539.8*10-3=46.58A
Intermediate transformer exports electric current are as follows:
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 export electric current are as follows:
IFrequency conversion=23.3*20A=466A
B) when transformer voltage ratio is 17.14, intermediate transformer low-pressure side and frequency changing power device export electric current are as follows:
IFrequency conversion=23.3*17.14A=399.36A
According to feed cable according to every mm24A is born, is selected under (a) kind no-load voltage ratio, power supply device output cable is at least
120mm2, therefore the cable that the present embodiment is selected can satisfy above-mentioned output current requirements.
Likewise, can find outWithUnder, intermediate transformer low-pressure side and frequency changing power device
Export electric current.
S150: it according to pressurization sequence, adjusts the frequency changing power device and exports the partial discharge measurement test current and described
Pre-add electric current, and the partial discharge value that shunt reactor is tested described in each pressure period is tested by PD meter.
In the present embodiment, include to the voltage of tested highly resistance device application in parallel
With
In the entire period for applying test voltage, the shelf depreciation of tested highly resistance device in parallel 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.
Applying voltage U1Short time in, do not require read PD meter discharge capacity discharge waveform but should observe；It is applying
Making alive U2And U3In, partial discharge value should be read respectively and records reading.
2) the frequency changing power device output current value is adjusted, according to U3、U2And U1Decompression pressurized in sequence.
Applying voltage U2During entire, it should continuously observe and record a shelf depreciation by every 5min time interval
It is horizontal；Applying voltage U3During entire, it should continuously observe, read and record partial discharge value；Applying voltage U1Short time
It is interior, it does not require the discharge capacity discharge waveform for reading PD meter but should observe.
If test voltage does not generate unexpected decline, and is applying test electricity in the observation process of above-mentioned shelf depreciation
It presses in 60min, the continuous horizontal of the Apparent discharge magnitude in all measurement terminals, is lower than defined limit value (500pC), then test is
It is qualified；
If whithin a period of time, the reading of Apparent discharge magnitude is more than defined limit value, but is lower than this limit value again later,
Then test need not be interrupted and can be still carried out continuously, until acceptable reading is obtained during 60min hereafter.Accidentally go out
Existing higher pulse is negligible.
According to testing conditions, to test result analysis, wherein meet and meet rule in partial discharge test phase, partial discharge quantity
Range request, and test voltage does not generate when declining two conditions suddenly, then and the tested PD meter in parallel of judgement is qualified.
To improve test accuracy, the method also includes: before carrying out partial discharge test, in the tested shunt reactor
End shield of high-voltage bushing at connect divider, using the divider, from tested shunt reactor high-voltage end inject standard block into
Row system voltage is checked.
Further, before carrying out partial discharge test, can also include the following steps:
A) ensure to be tested highly resistance Current Transformer Secondary terminal and be shorted ground connection；
B) highly resistance must complete whole routine tests and oil test, including insulating oil chromatography test, and conclusion is qualified；
72 hours c) must be stood after highly resistance vacuum oil or more；
D) it bleeds off at each side casing flange, the gas of radiator top etc. deposition.
By above technical scheme as it can be seen that 500kV high-voltage shunt reactor provided in this embodiment scene local discharge test system
That is method, it can be achieved that handover regulatory requirements after being detected by theoretical calculation, testing equipment type selecting, parameter configuration and field test
(partial discharge measures test voltage to valuePre- making alive is) as defined in test, realize to highly resistance circle
Between insulation performance abundant examination, further strengthen the detection to 500kV highly resistance turn-to-turn insulation performance, promote highly resistance and network
Testing inspection ability.
Those skilled in the art will readily occur to of the invention its after considering specification and the invention invented here of practice
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
The common knowledge in the art that person's adaptive change follows general principle of the invention and do not invent including the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (8)
1. a kind of 500kV high-voltage shunt reactor scene local discharge test method utilizes 500kV high-voltage shunt reactor scene partial discharge
Pilot system, which is characterized in that the system comprises:
Three-phase alternating-current supply (1), switch (2), frequency changing power device (3), intermediate transformer (4), first capacitor device (5), second
Capacitor (6), third capacitor (7), checking of great current impedance (8), PD meter (9) and wave arrestment reactor (10), in which:
The output end of the three-phase alternating-current supply (1) is electrically connected with one end of the switch (2), the other end of the switch (2)
It is electrically connected with the input terminal of the frequency changing power device (3), the output end of the frequency changing power device (3) and the intermediate transformation
The low-pressure side of device (4) is electrically connected, the side electricity of the high-pressure side firewire of the intermediate transformer (4) and the first capacitor device (5)
Connection, the other side of the first capacitor device (5) are connect with the input terminal of tested shunt reactor (11), the tested electricity in parallel
The output end of anti-device (11) is electrically connected with the high-pressure side zero curve of the intermediate transformer (4)；
Second capacitor (6) and the third capacitor (7) are in parallel with tested shunt reactor (11) respectively；
The tested shunt reactor is connect in one end of the checking of great current impedance (8) and second capacitor (6)
(11) one end electrical connection of output end, other end ground connection, the PD meter (9) are in parallel with checking of great current impedance (8)；
The tested shunt reactor (11) is connect in the input terminal of the wave arrestment reactor (10) and the third capacitor (7)
One end electrical connection of output end, output end ground connection；
The described method includes:
According to the principle of series resonant circuit, by condition of resonanceIt calculates by capacitor and tested electricity in parallel
The resonance frequency f of the test loop of anti-device composition, wherein L is the tested shunt reactor and the second capacitor and third electricity
The equivalent inductance of container, C1For the capacitance of first capacitor device；
Test voltage and pre- making alive are measured according to partial discharge, calculates the electric current and described the of the tested shunt reactor
The compensation electric current of two capacitors and third capacitor, wherein the partial discharge measures test voltage and isThe pre-add
Voltage isThe highest operating voltage of shunt reactor is tested described in Um；
Compensation electric current that the electric current of the tested shunt reactor is subtracted to second capacitor and third capacitor, obtains
Between transformer high-pressure side export electric current；
According to the no-load voltage ratio of the intermediate transformer, calculate corresponding with partial discharge measurement test voltage in frequency changing power device
Partial discharge measures test current and pre-add electric current corresponding with the pre- making alive；
According to pressurization sequence, adjusts the frequency changing power device and exports the partial discharge measurement test current and the pre-add electric current,
And the partial discharge value that shunt reactor is tested described in each pressure period is tested by PD meter.
2. 500kV high-voltage shunt reactor according to claim 1 scene local discharge test method, which is characterized in that described
Method further include:
Before carrying out partial discharge test, divider is connected at the end shield of high-voltage bushing of the tested shunt reactor；
System voltage check is carried out using the divider.
3. 500kV high-voltage shunt reactor according to claim 1 scene local discharge test method, which is characterized in that described
First capacitor device (5), second capacitor (6) and the third capacitor (7) are 200kV, specified appearance by voltage rating
Amount is that three sub-capacitors of 90nF connect to be formed, and is equipped with grading ring on three sub-capacitors.
4. 500kV high-voltage shunt reactor according to claim 3 scene local discharge test method, which is characterized in that three
The applicable voltage class of the grading ring is sequentially reduced from tested shunt reactor (11) input terminal to output end.
5. 500kV high-voltage shunt reactor according to claim 1 scene local discharge test method, which is characterized in that described
The other side of first capacitor device (5) is connect by high pressure expanded diameter conductor with the input terminal of tested shunt reactor (11), the height
The line footpath of expanded diameter conductor is pressed to be more than or equal to 400mm2。
6. 500kV high-voltage shunt reactor scene local discharge test method according to claim 1 or 5, which is characterized in that institute
The second capacitor (6) and the third capacitor (7) 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。
7. 500kV high-voltage shunt reactor according to claim 1 scene local discharge test method, which is characterized in that described
It is electrically connected between three-phase alternating-current supply (1), switch (2) and the frequency changing power device (3) using cable, the line footpath of the cable
More than or equal to 120mm2。
8. 500kV high-voltage shunt reactor according to claim 1 scene local discharge test method, which is characterized in that described
System further includes divider, the side of the divider connect with the end shield of high-voltage bushing of the tested shunt reactor (11),
Other side ground connection.
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)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106501696A CN106501696A (en) | 2017-03-15 |
| CN106501696B true CN106501696B (en) | 2019-09-06 |
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