CN201716400U - Test loop for being tangent to high-voltage circuit breaker of back to back capacitor unit - Google Patents
Test loop for being tangent to high-voltage circuit breaker of back to back capacitor unit Download PDFInfo
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- CN201716400U CN201716400U CN2010202414314U CN201020241431U CN201716400U CN 201716400 U CN201716400 U CN 201716400U CN 2010202414314 U CN2010202414314 U CN 2010202414314U CN 201020241431 U CN201020241431 U CN 201020241431U CN 201716400 U CN201716400 U CN 201716400U
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- short circuit
- circuit transformer
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Abstract
The utility model relates to the field of high power test of a high-voltage circuit breaker, and discloses a test loop for being tangent to the high-voltage circuit breaker of a back to back capacitor unit. The test loop comprises a short circuit generator, a first short circuit transformer and a second short circuit transformer, wherein both the primary side of the first short circuit transformer and the primary side of the second short circuit transformer are connected in parallel with the short circuit generator; the primary sides of the first short circuit transformer and the second short circuit transformer are connected in parallel in a reverse polarity manner, subtractive polarity end points of the two secondary sides are grounded after being connected in series, and an auxiliary switch, a test article breaker, a load resistor, a load inductor and a load capacitor are sequentially connected in series between the positive polarity end point of secondary side of the first short circuit transformer and the positive polarity end point of the secondary side of the second short circuit transformer; and a charging capacitor is arranged between the common node of the auxiliary switch and the test article circuit breaker and the positive polarity end point of the secondary side of the second short circuit transformer.
Description
Technical field
The utility model relates to primary cut-out high capacity test field, particularly a kind of test loop that is used to suit back-to-back capacitor group primary cut-out.
Background technology
More extra-high-voltage alternating current demonstration project and DC transmission engineering all need primary cut-out to organize shnt capacitor at the AC side switching and compensate, and suiting back-to-back capacitor group is a kind of common basic operation.In the above power transmission engineering, transmission line of electricity is long, transmission capacity is big, the specified capacity current value of isolating switch is bigger, as: the back-to-back current conversion station in Heihe is 900A with the back-to-back capacitor group of AC circuit breaker electric current, give DC transmission system again for ± 800 kilovolts and reach 1500A with the single capacitor group of AC circuit breaker electric current, extra-high voltage demonstration project opening-closing capacitor bank reaches 3500A with the single capacitor group of AC circuit breaker electric current; Back-to-back capacitor group electric current is 1600A.
During opening-closing capacitor bank,, can cause serious shoving and superpotential, electrical network is caused very big threat although electric current is little usually.Therefore, isolating switch suits the test of capacitor group and seems particularly important.Be used for suiting the test of back-to-back capacitor group primary cut-out, require the trial voltage height, capacity of capacitor bank is big, adopts testing requirementss such as traditional applied voltage test loop is difficult to satisfy power system capacity, the peak value that shoves.
Summary of the invention
At above-mentioned technical matters, the purpose of this utility model is to provide a kind of test loop that is used to suit back-to-back capacitor group primary cut-out, can improve power system capacity, and satisfies the testing requirements of shove peak value 20kA, frequency 4250Hz.
In order to address the above problem, the utility model is achieved by the following technical solutions.
A kind of test loop that is used to suit back-to-back capacitor group primary cut-out is characterized in that, comprises short-circuit generator, former limit first short circuit transformer and the second short circuit transformer in parallel respectively with short-circuit generator; Two former limit reversed polarity parallel connections of the described first short circuit transformer and the second short circuit transformer, the negative polarity end points of two secondary series connection back ground connection, the positive polarity end points of the first short circuit transformer secondary and and the positive polarity end points of the second short circuit transformer secondary between be in series with auxiliary switch, test product isolating switch, pull-up resistor, load inductance, load capacitance successively; Be connected with charging capacitor between the positive polarity end points of the common node of described auxiliary switch and test product isolating switch and the second short circuit transformer secondary.
Further improvement of the utility model and characteristics are: the positive polarity end points of (1) described first short circuit transformer secondary and and the positive polarity end points of the second short circuit transformer secondary respectively correspondence be connected with first voltage sensor and second voltage sensor, the common node of described pull-up resistor and test product isolating switch is connected with the tertiary voltage sensor.
(2) end of incoming cables of described test product isolating switch is provided with current sensor.
(3) described short-circuit generator output terminal is disposed with protective breaker, combined floodgate switch and operating breaker.
The utility model adopts two short circuit transformers, be connected with the short-circuit generator output terminal after two former limit reversed polarity parallel connection, the negative polarity end points series connection back ground connection of two secondary forms testing power supply, improve the capacity of pilot system, reduced loop insulation voltage over the ground; The inrush phenomenon of test product isolating switch is regulated in charging capacitor, load capacitance and load inductance acting in conjunction, and load capacitance provides the capacity current of test product, pull-up resistor the shoving in the capacity current that be used to decay.
Description of drawings
Fig. 1 is the electrical connection diagram of back-to-back capacitor group and corresponding primary cut-out.
Fig. 2 is a concrete test loop of the present utility model schematic diagram; Among the figure: the G-short-circuit generator; QF
1-protective breaker; QM
1-combined floodgate switch; QF
2-operating breaker; The FK-auxiliary switch; T
1-the first short circuit transformer; T
2-the second short circuit transformer; SP-test product isolating switch; The impedance of Ls-mains side; The A-current sensor; C
1-charging capacitor; C
2-load capacitance; The R-pull-up resistor; The L-load inductance; V
1-the first voltage sensor; V
2-the second voltage sensor; V
3-tertiary voltage sensor.
Embodiment
With reference to Fig. 1, G1 is a generator; T is a transformer; Capacitor C 11, C12, C13 ... C1n composes in parallel back-to-back capacitor group; Primary cut-out k11, k12, k13 ... kn 11 be respectively corresponding capacitor C 11, C12, C13 ... C1n suits isolating switch.
With reference to Fig. 2, be example with the 550kV potting breaker, short-circuit generator G is through protective breaker QF
1, combined floodgate switch QM
1, mains side impedance Ls and operating breaker QF
2After, connect the first short circuit transformer T
1Former limit (low-pressure side).The second short circuit transformer T
2With the first short circuit transformer T
1Two former limit reversed polarity parallel connections, the negative polarity end points of two secondary series connection back ground connection, the first short circuit transformer T
1The positive polarity end points of secondary and and the second short circuit transformer T
2The positive polarity end points of secondary is drawn, as two output terminals of testing power supply.
Auxiliary switch FK, current sensor A, test product isolating switch SP, pull-up resistor R, load inductance L, load capacitance C successively connect between two output terminals of testing power supply
2, the leading-out terminal of auxiliary switch FK and the second short circuit transformer T
2Connect charging capacitor C between the positive polarity end points of secondary
1Charging capacitor C
1, load capacitance C
2With the inrush phenomenon of load inductance L acting in conjunction adjusting test product isolating switch, and load capacitance C
2Provide the capacity current of test product, pull-up resistor R the shoving in the capacity current that be used to decay.
The first short circuit transformer T
1The positive polarity end points of secondary and and the second short circuit transformer T
2The positive polarity end points of secondary correspondence respectively is connected with the first voltage sensor V
1With the second voltage sensor V
2, the common node of pull-up resistor R and test product isolating switch SP is connected with tertiary voltage sensor V
3
During experiment, SP is placed on the insulated platform with the test product isolating switch, and its tank body insulation against ground also links to each other with fracture energized conductor one end.During test, close protective breaker QF earlier
1, operating breaker QF
2, combined floodgate switch QM
1, auxiliary switch FK, test product isolating switch SP is in the separating brake position, and short-circuit generator G is carried out excitation, charging capacitor C
1Charging, test product isolating switch SP two ends are with voltage.Then, close test product isolating switch SP earlier by test routine, test product isolating switch SP closes and to close capacity current, produces the pass of satisfying standard-required peak value, frequency and closes and shove, and the test loop is connected simultaneously, load capacitance C
2Be recharged.0.1 second back test product isolating switch SP separating brake, this moment, test product isolating switch SP need cut-off capacity current, and 1/2 utmost point fracture of test product isolating switch SP and energized conductor one end and tank body will bear very high recovery voltage (2 times trial voltages) simultaneously.0.3 second back operating breaker QF
2Separating brake carries out demagnetization to short-circuit generator G simultaneously, and test product isolating switch SP does not bear voltage, off-test in two ends.
This test loop and actual motion condition are approaching, shove peak value and the frequency that satisfy standard-required can be provided, and guarantee to apply correct voltage at two terminals of test product isolating switch, automatically correct power frequency recovery voltage, zero district's electric arc and loop occurring interacts, and operate the test loop and control is simple, the test efficiency height.
Claims (4)
1. a test loop that is used to suit back-to-back capacitor group primary cut-out is characterized in that, comprises short-circuit generator, former limit first short circuit transformer and the second short circuit transformer in parallel respectively with short-circuit generator; Two former limit reversed polarity parallel connections of the described first short circuit transformer and the second short circuit transformer, the negative polarity end points of two secondary series connection back ground connection, the positive polarity end points of the first short circuit transformer secondary and and the positive polarity end points of the second short circuit transformer secondary between be in series with auxiliary switch, test product isolating switch, pull-up resistor, load inductance, load capacitance successively; Be connected with charging capacitor between the positive polarity end points of the common node of described auxiliary switch and test product isolating switch and the second short circuit transformer secondary.
2. the test loop that is used to suit back-to-back capacitor group primary cut-out according to claim 1, it is characterized in that, the positive polarity end points of the described first short circuit transformer secondary and and the positive polarity end points of the second short circuit transformer secondary respectively correspondence be connected with first voltage sensor and second voltage sensor, the common node of described pull-up resistor and test product isolating switch is connected with the tertiary voltage sensor.
3. the test loop that is used to suit back-to-back capacitor group primary cut-out according to claim 1 is characterized in that the end of incoming cables of described test product isolating switch is provided with current sensor.
4. the test loop that is used to suit back-to-back capacitor group primary cut-out according to claim 1 is characterized in that described short-circuit generator output terminal is disposed with protective breaker, combined floodgate switch and operating breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202414314U CN201716400U (en) | 2010-06-29 | 2010-06-29 | Test loop for being tangent to high-voltage circuit breaker of back to back capacitor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202414314U CN201716400U (en) | 2010-06-29 | 2010-06-29 | Test loop for being tangent to high-voltage circuit breaker of back to back capacitor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201716400U true CN201716400U (en) | 2011-01-19 |
Family
ID=43462406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202414314U Expired - Lifetime CN201716400U (en) | 2010-06-29 | 2010-06-29 | Test loop for being tangent to high-voltage circuit breaker of back to back capacitor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201716400U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329068A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | Spark gap recover loop and the method for voltage test in a kind of series compensation device |
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch direct current sky fills current breaking test method |
-
2010
- 2010-06-29 CN CN2010202414314U patent/CN201716400U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329068A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | Spark gap recover loop and the method for voltage test in a kind of series compensation device |
| CN107329068B (en) * | 2017-06-30 | 2020-06-23 | 中国西电电气股份有限公司 | Circuit and method for performing voltage recovery test on spark gap in series compensation device |
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch direct current sky fills current breaking test method |
| CN110376515B (en) * | 2019-07-10 | 2021-11-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | DC high-speed switch DC air charging current on-off test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110119 |