CN111610419B - Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor - Google Patents
Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor Download PDFInfo
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- CN111610419B CN111610419B CN202010490569.6A CN202010490569A CN111610419B CN 111610419 B CN111610419 B CN 111610419B CN 202010490569 A CN202010490569 A CN 202010490569A CN 111610419 B CN111610419 B CN 111610419B
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- 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
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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
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Abstract
The invention discloses a method for carrying out long-distance submarine cable voltage withstand test by using a reactive compensation reactor, which comprises the following steps: calculating a parallel compensation inductance value L according to reactance values of the land station reactive compensation reactor and the sea station reactive compensation reactor 2 (ii) a Calculating the inductance L of the test series adjustable reactor when the series-parallel resonance is reached according to a series-parallel resonance calculation formula 1 (ii) a Adjusting the inductance value of the test series adjustable reactor according to the calculated inductance value of the test series adjustable reactor 4, setting the frequency of a variable frequency power supply, then performing a slow boosting test, stopping boosting when the reading of the test capacitive voltage divider reaches a test voltage, maintaining the preset time, and disconnecting the variable frequency power supply for discharging after the time is over to finish the long-distance submarine cable voltage withstand test by using the reactive compensation reactor.
Description
Technical Field
The invention belongs to the field of high-voltage tests of power equipment, and relates to a method for performing a long-distance submarine cable voltage withstand test by using a reactive compensation reactor.
Background
Offshore wind power in China is becoming a new power for global offshore wind power development, and the supporting effect of offshore wind power on energy transformation in China will be more and more obvious. Submarine cables are an indispensable part of ocean wind power construction, and the ocean wind power is developed from shallow sea to deep sea at present, which means that the submarine cables are longer and longer, and a pressure test is taken as a key part in a cable handover test, so that the research and the discussion of pressure test schemes and specific test methods of the long-distance cables are significant.
At present, the submarine high-voltage cable is mainly a cross-linked polyethylene insulation composite cable, and an alternating current voltage withstand test is carried out according to the requirement in GB 50150 and 2016 electric equipment handover test standard in a voltage withstand mode. Because the high-voltage long-distance crosslinked polyethylene submarine cable has large capacity to ground, the requirement on withstand voltage test power supply equipment is high, the field test difficulty is high, and the alternating current withstand voltage test can be performed on the submarine cable by using a series-parallel resonance test method. The test method of series-parallel resonance utilizes the resonance principle, compensates the capacitance current of the ground capacitance of the submarine cable through series-connection and parallel-connection reactor groups, and achieves resonance through adjusting the frequency through the frequency conversion device, so as to achieve the purpose of enabling the submarine cable to achieve the test voltage under the condition of the minimum test power supply. However, with the increase of the length of the submarine cable, more parallel reactors and series reactors need to be configured according to the parameters of the submarine cable, and the test difficulty is still higher.
The offshore wind power plant mainly comprises a land booster station, an offshore booster station and various fans distributed in the sea area, wherein the offshore booster station is connected with the land booster station, and the fans are connected through submarine cables. Due to the long length of the submarine cables, large reactive compensation reactors are now deployed at sea and land stations to prevent operating overvoltage conditions in the submarine cables.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for performing a long-distance submarine cable voltage withstand test by using a reactive compensation reactor, the method can use the reactive compensation reactors configured in a land booster station and a marine booster station as parallel compensation reactors to perform an alternating current voltage withstand test on submarine cables, the capacity and the number of field test equipment are small, and the test difficulty and the test cost are low.
In order to achieve the purpose, the method for performing the long-distance submarine cable voltage withstand test by using the reactive compensation reactor comprises the following steps:
1) calculating the ground capacitance L of the submarine cable according to the length of the submarine cable and the equivalent capacitance per kilometer of the submarine cable to the ground 2 ；
2) Calculating a parallel compensation inductance value L according to reactance values of the land station reactive compensation reactor and the sea station reactive compensation reactor 2 ；
3) Setting rated frequency f of the land station reactive compensation reactor and the sea station reactive compensation reactor, and calculating inductance value L of the test series adjustable reactor when series-parallel resonance is achieved according to a series-parallel resonance calculation formula 1 ；
4) Disconnecting a land station reactor interval breaker, a land station reactor interval isolation disconnecting link, a sea station reactor interval breaker and a sea station reactor interval isolation disconnecting link, connecting one side of a variable frequency power supply with a test power supply, connecting the other side of the variable frequency power supply with the low-voltage side of a test transformer, connecting the high-voltage end of the high-voltage side of the test transformer with one end of a test series adjustable reactor, grounding the grounding end of the high-voltage side of the test transformer, connecting the other end of the test series adjustable reactor with a submarine cable and a connecting sleeve of a land station reactive compensation reactor, connecting a test capacitance voltage divider with the submarine cable and the connecting sleeve of the land station reactive compensation reactor, adjusting the inductance value of the test series adjustable reactor according to the calculated inductance value of the test series adjustable reactor 4, setting the frequency of the variable frequency power supply, and then performing a slow boost test, and stopping boosting when the reading of the test capacitive voltage divider reaches the test voltage, maintaining the preset time, and disconnecting the variable frequency power supply to discharge after the time is over so as to finish the long-distance submarine cable voltage withstand test by using the reactive compensation reactor.
The capacitance C of the submarine cable to ground capacitance is equal to the length of the submarine cable multiplied by the equivalent capacitance per kilometer of submarine cable to ground.
And 3) setting the rated frequency of the land station reactive compensation reactor and the sea station reactive compensation reactor to be 50 Hz.
And 4) setting the frequency of the variable frequency power supply to be 50 Hz.
The series-parallel resonance calculation formula is as follows:
the preset time is 60 min.
The invention has the following beneficial effects:
the method for carrying out the long-distance submarine cable voltage withstand test by utilizing the reactive compensation reactor comprises the steps of utilizing a land station reactive compensation reactor and a sea station reactive compensation reactor which are configured in a land booster station and a sea booster station as parallel compensation reactors, and calculating the inductance value L of a test series adjustable reactor when series-parallel resonance is achieved according to a series-parallel resonance calculation formula 1 During the experiment, only the inductance value of the test series reactor needs to be adjusted to the inductance value L 1 The device can perform long-distance submarine cable pressure-resistant test, the number and the capacity of test equipment are smaller, the requirements of the capacity of a test power supply and a test field are lower, the test difficulty and the test cost are lower, and the reactive compensation reactor cannot be damaged due to the fact that the pressure-resistant grade of the reactive compensation reactor is higher than that of a submarine cable.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The system comprises a test power supply 1, a variable frequency power supply 2, a test transformer 3, a test series adjustable reactor 4, a land station reactor spacing breaker 5, a land station reactor spacing isolation disconnecting link 6, a sea station reactor spacing breaker 7, a sea station reactor spacing isolation disconnecting link 8, a land station reactive compensation reactor 9, a test capacitance divider 10, a submarine cable ground capacitance 11 and a sea station reactive compensation reactor 12.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the method for performing a long-distance submarine cable voltage withstand test by using a reactive compensation reactor according to the present invention includes the following steps:
1) calculating the ground capacitance L of the submarine cable according to the length of the submarine cable and the equivalent capacitance per kilometer of the submarine cable to the ground 2 ；
2) Calculating the parallel compensation inductance value L according to the reactance values of the land station reactive compensation reactor 9 and the sea station reactive compensation reactor 12 2 ；
3) Setting the rated frequency f of the land station reactive compensation reactor 9 and the sea station reactive compensation reactor 12, and calculating the inductance L of the test series adjustable reactor 4 when the series-parallel resonance is achieved according to a series-parallel resonance calculation formula 1 ；
4) Disconnecting a land station reactor interval breaker 5, a land station reactor interval isolation disconnecting link 6, a sea station reactor interval breaker 7 and a sea station reactor interval isolation disconnecting link 8, connecting one side of a variable frequency power supply 2 with a test power supply 1, connecting the other side of the variable frequency power supply 2 with the low-voltage side of a test transformer 3, connecting the high-voltage end of the high-voltage side of the test transformer 3 with one end of a test series adjustable reactor 4, grounding the grounding end of the high-voltage side of the test transformer 3, connecting the other end of the test series adjustable reactor 4 with a submarine cable and a connecting sleeve of a land station reactive compensation reactor 9, connecting a test capacitive voltage divider 10 with the submarine cable and the connecting sleeve of the land station reactive compensation reactor 9, adjusting the inductance value of the test series adjustable reactor 4 according to the calculated inductance value of the test series adjustable reactor 4, setting the frequency of the variable frequency power supply 2, and then, performing a slow voltage boosting test, stopping boosting when the reading of the test capacitive voltage divider 10 reaches the test voltage, maintaining the preset time, and disconnecting the variable frequency power supply 2 for discharging after the time is over so as to finish the long-distance submarine cable voltage withstand test by using the reactive compensation reactor.
The capacitance value C of the submarine cable to ground capacitance 11 is equal to the length of the submarine cable multiplied by the equivalent capacitance per kilometre of submarine cable to ground.
And 3) setting the rated frequency of the land station reactive compensation reactor 9 and the sea station reactive compensation reactor 12 to be 50 Hz.
And 4) setting the frequency of the variable frequency power supply 2 to be 50 Hz.
The series-parallel resonance calculation formula is as follows:
the preset time is 60 min.
In conclusion, the land station reactive compensation reactor 9 and the sea station reactive compensation reactor 12 which are configured in the land booster station and the offshore booster station can be used as the parallel compensation reactors, and the alternating current withstand voltage test can be performed on the submarine cable by using the resonance principle only by configuring a proper series reactor through parameter calculation, so that the capacity and the number of field test equipment are reduced, and the test difficulty and the test cost are reduced.
Claims (6)
1. A method for carrying out long-distance submarine cable voltage withstand test by utilizing a reactive compensation reactor is characterized by comprising the following steps:
1) calculating the ground capacitance C of the submarine cable according to the length of the submarine cable and the equivalent capacitance of the submarine cable to the ground per kilometer;
2) calculating a parallel compensation inductance value L according to the reactance values of the land station reactive compensation reactor (9) and the sea station reactive compensation reactor (12) 2 ；
3) Setting rated frequency f of a land station reactive compensation reactor (9) and a sea station reactive compensation reactor (12), and calculating inductance L of a test series adjustable reactor (4) when series-parallel resonance is achieved according to a series-parallel resonance calculation formula 1 ；
4) Disconnecting a land station reactor interval breaker (5), a land station reactor interval isolation disconnecting link (6), a sea station reactor interval breaker (7) and a sea station reactor interval isolation disconnecting link (8), connecting one side of a variable frequency power supply (2) with a test power supply (1), connecting the other side of the variable frequency power supply (2) with the low-voltage side of a test transformer (3), connecting the high-voltage end of the high-voltage side of the test transformer (3) with one end of a test series adjustable reactor (4), grounding the grounding end of the high-voltage side of the test transformer (3), connecting the other end of the test series adjustable reactor (4) with a submarine cable and a connecting sleeve of a land station reactive compensation reactor (9), connecting a test capacitor voltage divider (10) with the submarine cable and the connecting sleeve of the land station reactive compensation reactor (9), adjusting the inductance of the test series adjustable reactor (4) according to the calculated inductance of the test series adjustable reactor (4), the frequency of the variable frequency power supply (2) is set, then a slow boosting test is carried out, boosting is stopped when the reading of the test capacitive voltage divider (10) reaches the test voltage, the preset time is maintained, after the time is over, the variable frequency power supply (2) is disconnected for discharging, and the long-distance submarine cable voltage withstand test by using the reactive compensation reactor is completed.
2. The method for the withstand voltage test of the long-distance submarine cable by using the reactive compensation reactor according to claim 1, wherein the capacitance C to ground of the submarine cable is equal to the length of the submarine cable multiplied by the equivalent capacitance per kilometer of the submarine cable to ground.
3. The method for long-distance submarine cable voltage withstand test by using reactive power compensation reactor according to claim 1, wherein the rated frequency of the land reactive power compensation reactor (9) and the submarine reactive power compensation reactor (12) is set to 50Hz in step 3).
4. The method for carrying out the long-distance submarine cable voltage withstand test by using the reactive power compensation reactor according to claim 1, wherein the frequency of the variable frequency power supply (2) is set to be 50Hz in the step 4).
5. The method for carrying out the long-distance submarine cable voltage withstand test by using the reactive power compensation reactor according to claim 1, wherein the series-parallel resonance calculation formula is as follows:
6. the method for carrying out the long-distance submarine cable voltage withstand test by using the reactive power compensation reactor according to claim 1, wherein the preset time is 60 min.
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| CN112305383A (en) * | 2020-10-13 | 2021-02-02 | 中广核工程有限公司 | Gas insulated bus installation test method |
| CN112964968B (en) * | 2021-02-04 | 2022-10-11 | 西安热工研究院有限公司 | System and method for testing long-distance submarine high-voltage cable voltage resistance of high-voltage bushing |
| CN113791664B (en) * | 2021-07-26 | 2023-04-18 | 广东电网有限责任公司广州供电局 | Power compensation device and power compensation method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6056269A (en) * | 1983-09-08 | 1985-04-01 | Fuji Electric Co Ltd | Ac withstand voltage testing method of transformer |
| US5194817A (en) * | 1991-07-18 | 1993-03-16 | James G. Biddle Co. | Apparatus and method for testing insulation using a pulsed resonant power supply |
| CN202119866U (en) * | 2011-05-25 | 2012-01-18 | 黑龙江省安装工程公司 | Variable-frequency series resonance voltage withstanding test device |
| CN104793116A (en) * | 2015-04-29 | 2015-07-22 | 国网辽宁省电力有限公司大连供电公司 | Voltage withstand test device for large-capacity equipment |
| CN105548833A (en) * | 2015-12-09 | 2016-05-04 | 天津二十冶建设有限公司 | High-voltage cable frequency conversion series resonance voltage withstand debugging method |
| CN205982527U (en) * | 2016-08-24 | 2017-02-22 | 扬州市鑫源电气有限公司 | 500kV and following length cable field test system off sea |
| CN109521338A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Frequency conversion parallel resonance pressure resistant test method based on Cascade boosting |
| CN109521339A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Based on the non-power frequency parallel resonance pressure resistant test method compensated entirely |
| CN109581165A (en) * | 2018-12-28 | 2019-04-05 | 黄江涛 | Novel cable ac voltage withstanding pilot system |
| CN110208661A (en) * | 2019-06-21 | 2019-09-06 | 中国电建集团河南工程有限公司 | Offshore boosting station transformer pressure resistance local discharge test method |
-
2020
- 2020-06-02 CN CN202010490569.6A patent/CN111610419B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6056269A (en) * | 1983-09-08 | 1985-04-01 | Fuji Electric Co Ltd | Ac withstand voltage testing method of transformer |
| US5194817A (en) * | 1991-07-18 | 1993-03-16 | James G. Biddle Co. | Apparatus and method for testing insulation using a pulsed resonant power supply |
| CN202119866U (en) * | 2011-05-25 | 2012-01-18 | 黑龙江省安装工程公司 | Variable-frequency series resonance voltage withstanding test device |
| CN104793116A (en) * | 2015-04-29 | 2015-07-22 | 国网辽宁省电力有限公司大连供电公司 | Voltage withstand test device for large-capacity equipment |
| CN105548833A (en) * | 2015-12-09 | 2016-05-04 | 天津二十冶建设有限公司 | High-voltage cable frequency conversion series resonance voltage withstand debugging method |
| CN205982527U (en) * | 2016-08-24 | 2017-02-22 | 扬州市鑫源电气有限公司 | 500kV and following length cable field test system off sea |
| CN109521338A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Frequency conversion parallel resonance pressure resistant test method based on Cascade boosting |
| CN109521339A (en) * | 2018-11-27 | 2019-03-26 | 汪锐 | Based on the non-power frequency parallel resonance pressure resistant test method compensated entirely |
| CN109581165A (en) * | 2018-12-28 | 2019-04-05 | 黄江涛 | Novel cable ac voltage withstanding pilot system |
| CN110208661A (en) * | 2019-06-21 | 2019-09-06 | 中国电建集团河南工程有限公司 | Offshore boosting station transformer pressure resistance local discharge test method |
Non-Patent Citations (2)
| Title |
|---|
| 500kV海南联网海底电缆试验技术研究;彭婵;《中国优秀硕士学位论文全文数据库工程科技II辑》;20120215;C042-14 * |
| Analysis on capacitance rise of 500kV XLPE submarine cable in AC voltage withstand test;Yong Yang et al.;《2019 8th Renewable Power Generation Conference》;20200319;1-5 * |
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