CN114113996A - Flexible direct-current power transmission converter valve submodule field test method and system - Google Patents
Flexible direct-current power transmission converter valve submodule field test method and system Download PDFInfo
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- CN114113996A CN114113996A CN202111311148.3A CN202111311148A CN114113996A CN 114113996 A CN114113996 A CN 114113996A CN 202111311148 A CN202111311148 A CN 202111311148A CN 114113996 A CN114113996 A CN 114113996A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000010998 test method Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 48
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 238000011990 functional testing Methods 0.000 abstract description 3
- 238000013522 software testing Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 14
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 1
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses a field test method and a field test system for a submodule of a flexible direct-current power transmission converter valve, and relates to the field of converter valve tests. The conventional test method can only test a single sub-module, and has low efficiency. The invention is characterized in that each sub-module port is provided with a switch module in parallel. The tester remotely controls to turn off the first submodule parallel switch module and turn on other submodule parallel switch modules to enable the 1 st submodule to be connected in series into a test loop and bypass other submodules, finally controls the tester to apply a test power supply to the tested submodule to start to perform functional test on the tested submodule, after the first submodule is tested, the second submodule parallel switch is turned off, other submodule parallel switches are closed, the steps are repeated, and the steps are circulated in sequence to complete the functional test of all submodules. This technical scheme has greatly improved efficiency of software testing, reduces the demand to the tester power, and low pressure detects just can, and effective reduce cost improves the security that detects simultaneously, avoids high-voltage danger.
Description
Technical Field
The invention relates to the field of converter valve tests, in particular to a field test method and a field test system for a flexible direct current transmission converter valve submodule.
Background
Modular multilevel flexible direct current transmission (MMC-HVDC) is a new generation of direct current transmission technology, and flexible direct current transmission is voltage source-based direct current transmission, and the voltage polarity of a direct current line is unchanged, so that multi-terminal direct current transmission is very easy to form, and power can be directly supplied to a small isolated load of a long-distance system, particularly a passive system. The number of the sub-modules of the flexible direct-current transmission converter valve is large, the conventional testing method can only test a single sub-module, and a testing connection line needs to be replaced by a person after testing. Automatic batch testing cannot be realized, and the efficiency is low.
Disclosure of Invention
The technical problem to be solved and the technical task provided by the invention are to perfect and improve the prior technical scheme, and provide a method and a system for testing a flexible direct current transmission converter valve submodule on site, so as to achieve the purpose. Therefore, the invention adopts the following technical scheme.
A flexible direct current transmission converter valve submodule field test method comprises the following steps:
1) each power unit of the converter valve is used as a submodule; each sub-module is connected with the tester through a connecting device; the connecting device is provided with a plurality of switch modules, one switch module is connected with one sub-module in parallel, and the plurality of switch modules are connected in series;
2) the tester controls the switch module connected with the first sub-module in parallel to be disconnected, and the switch modules connected with other sub-modules in parallel to be closed, so that the first sub-module is positioned in the tested loop;
3) controlling the tester to apply voltage to the sub-module to be tested, and starting to test the functions of the sub-module after the charged voltage reaches the test voltage;
4) and after the first sub-module is tested, disconnecting the parallel switch of the second sub-module, closing the parallel switches of other sub-modules, repeating the steps and carrying out the function test of the second sub-module. And circulating in sequence to complete the function test of all the submodules.
The technical scheme realizes that the tester automatically performs alternate operation test on the tested modules, and greatly improves the test efficiency. And the tester only needs to output single submodule piece test voltage can, has reduced the demand to the tester power, and low pressure detects just can, and effective reduce cost improves the security that detects simultaneously, avoids high-voltage danger. Compared with manual detection, the efficiency is improved, the capacitor discharge is not needed, the bypass can be directly realized, more than ten minutes of capacitor discharge does not need to be waited, a large amount of detection time can be saved for the converter valve with hundreds of sub-modules, the detection accuracy is high, and errors are avoided; meanwhile, the remote operation can be realized, and the safety is further improved.
The technical scheme realizes the operation under the single tower, and saves a large amount of line connecting and changing time. The efficiency of on-spot submodule piece test is further improved, traditional converter valve submodule piece test can only use the monomer submodule piece as the test object, and two testers cooperate, and personnel on the tower carry out the line change operation to every submodule piece that is surveyed, and personnel under the tower control the tester and realize the submodule piece functional test, inefficiency.
As a preferable technical means: at any moment, the tester controls one sub-module to be connected in series into the test loop, and the other sub-modules are bypassed by the switch modules connected in parallel. The detection voltage can be effectively reduced, high-voltage online detection is not needed, the equipment cost is reduced, and the safety is improved.
As a preferable technical means: the tester controls the switch module one-to-one, or the tester controls the switch module through a field bus. The tester can control the switch module through a relay or a semiconductor device and the like.
As a preferable technical means: the tester controls the connecting device in a wired or wireless manner. To accommodate different scenarios.
As a preferable technical means: the switch module comprises a switch and two connecting wires connected with the switch, the two connecting wires are connected with the positive pole wiring terminal and the negative pole wiring terminal of the corresponding sub-module, the switch is connected with the sub-module in parallel, and the tester remotely controls the on-off of the switch.
The invention further aims to provide the field test system for the flexible direct current transmission converter valve submodule.
A flexible direct current transmission converter valve submodule field test system comprises a tester and a connecting device connected with the tester; the connecting device is provided with a plurality of switch modules which are connected in series, each switch module is provided with a connecting lead, and the connecting leads are connected with the positive and negative connecting terminals of the sub-modules to enable one switch module to be connected with one sub-module in parallel; the tester controls the on-off of each switch module.
As a preferable technical means: the tester controls the switch module one-to-one, or the tester controls the switch module through a field bus.
As a preferable technical means: the tester is connected with the connecting device in a wired or wireless mode.
As a preferable technical means: the tester controls the on-off of the switch module through the relay or the semiconductor device.
Has the advantages that: the technical scheme realizes that the tester automatically performs alternate operation test on the tested modules, and greatly improves the test efficiency. And the tester only needs to output single submodule piece test voltage can, has reduced the demand to the tester power, and low pressure detects just can, and effective reduce cost improves the security that detects simultaneously, avoids high-voltage danger. Compared with manual detection, the efficiency is improved, the capacitor discharge is not needed, the bypass can be directly realized, more than ten minutes of capacitor discharge does not need to be waited, a large amount of detection time can be saved for the converter valve with hundreds of sub-modules, the detection accuracy is high, and errors are avoided; meanwhile, the remote operation can be realized, and the safety is further improved.
Drawings
FIG. 1 is a schematic diagram of a low-voltage pressurization test system of a flexible direct-current transmission converter valve.
In the figure: 1. a sub-module; 2. a connecting device; 3. a switch module; 4. and (4) a tester.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
As shown in fig. 1, the field test system for the sub-module of the flexible direct current transmission converter valve comprises a tester 4 and a connecting device 2 connected with the tester 4; the connecting device 2 is provided with a plurality of switch modules 3 which are connected in series, each switch module 3 is provided with a connecting lead, and the connecting leads are connected with the positive and negative connecting terminals of the sub-modules 1 to enable one switch module 3 to be connected with one sub-module 1 in parallel; the tester 4 controls the on/off of each switch module 3.
The tester 4 can control the switch modules 3 one-to-one, or the tester 4 controls the switch modules 3 through a field bus.
The tester 4 is connected to the connection device 2 by wire or wirelessly as necessary.
In order to consider the cost and the reliability of work, the tester 4 controls the on-off of the switch module 3 through a relay or a semiconductor device.
Correspondingly, the field test method for the flexible direct-current transmission converter valve submodule comprises the following steps:
1. each power unit of the converter valve is used as a submodule 1; each sub-module 1 is connected with a tester 4 through a connecting device 2; the connecting device 2 is provided with a plurality of switch modules 3, one switch module 3 is connected with one sub-module 1 in parallel, and the plurality of switch modules 3 are connected in series;
2. the tester 4 controls the switch module 3 connected with the first sub-module 1 in parallel to be disconnected, and the switch modules 3 connected with other sub-modules 1 in parallel to be closed, so that the first sub-module 1 is positioned in a tested loop;
3. the tester 4 is controlled to apply voltage to the sub-module 1 to be tested, and the function test of the sub-module 1 is started after the voltage reaches the test voltage;
4. and after the first sub-module 1 is tested, disconnecting the parallel switch of the second sub-module 1, closing the parallel switches of other sub-modules 1, repeating the steps and carrying out the function test of the second sub-module 1. And circulating in sequence to complete the function test of all the sub-modules 1.
According to the technical scheme, the tested modules are automatically tested by the tester 4 in an alternate operation mode, and the testing efficiency is greatly improved. And the tester 4 only needs to output the test voltage of the single submodule 1, thus reducing the requirement on the power supply of the tester 4, detecting at low voltage, effectively reducing cost, improving the detection safety and avoiding high-voltage danger. Compared with manual detection, the efficiency is improved, the capacitors do not need to be discharged, the bypass can be directly realized, more than ten minutes of capacitor discharging does not need to be waited, a large amount of detection time can be saved for the converter valves with hundreds of sub-modules 1, the detection accuracy is high, and errors are avoided; meanwhile, the remote operation can be realized, and the safety is further improved.
In order to realize low-voltage testing, at any moment, the tester 4 controls one sub-module 1 to be connected in series into a testing loop, and other sub-modules 1 are bypassed by the switch modules 3 connected in parallel. The detection voltage can be effectively reduced, high-voltage online detection is not needed, the equipment cost is reduced, and the safety is improved.
The field test method and system for the sub-module of the flexible direct current transmission converter valve shown in fig. 1 are specific embodiments of the present invention, have shown the substantial features and progress of the present invention, and can make equivalent modifications in shape, structure and the like according to the practical use requirements and under the teaching of the present invention, which are within the protection scope of the present scheme.
Claims (9)
1. A flexible direct current transmission converter valve submodule field test method is characterized in that: the method comprises the following steps:
1) each power unit of the converter valve is used as a submodule (1); each sub-module (1) is connected with a tester (4) through a connecting device (2); the connecting device (2) is provided with a plurality of switch modules (3), one switch module (3) is connected with one sub-module (1) in parallel, and the plurality of switch modules (3) are connected in series;
2) the tester (4) controls the switch module (3) connected with the first sub-module (1) in parallel to be disconnected, and the switch modules (3) connected with other sub-modules (1) in parallel to be closed, so that the first sub-module (1) is positioned in a tested loop;
3) the control tester (4) applies voltage to the sub-module (1) to be tested, and the function test of the sub-module (1) is started after the charged voltage reaches the test voltage;
4) after the first sub-module (1) is tested, the parallel switch of the second sub-module (1) is disconnected, the parallel switches of other sub-modules (1) are closed, the steps are repeated, and the function test of the second sub-module (1) is carried out; and circulating in sequence to finish the function test of all the sub-modules (1).
2. The field test method for the submodule of the flexible direct current transmission converter valve according to claim 1, characterized by comprising the following steps: at any moment, the tester (4) controls one sub-module (1) to be connected in series into the test loop, and the other sub-modules (1) are bypassed by the switch modules (3) connected in parallel.
3. The field test method for the submodule of the flexible direct current transmission converter valve according to claim 2, characterized by comprising the following steps: the tester (4) controls the switch modules (3) one by one, or the tester (4) controls the switch modules (3) through a field bus.
4. The field test method for the submodule of the flexible direct current transmission converter valve according to claim 3, characterized by comprising the following steps: the tester (4) controls the connecting device (2) in a wired or wireless manner.
5. The field test method for the submodule of the flexible direct current transmission converter valve according to claim 4, characterized by comprising the following steps: the switch module (3) comprises a switch and two connecting wires connected with the switch, the two connecting wires are connected with the anode connecting terminal and the cathode connecting terminal of the corresponding sub-module (1) to enable the switch to be connected with the sub-module (1) in parallel, and the tester (4) remotely controls the on-off of the switch.
6. The field test system for the flexible direct-current transmission converter valve submodule according to any one of claims 1-5, which adopts the field test method for the flexible direct-current transmission converter valve submodule, is characterized in that: comprises a tester (4) and a connecting device (2) connected with the tester (4); the connecting device (2) is provided with a plurality of switch modules (3) which are connected in series, each switch module (3) is provided with a connecting lead, and the connecting leads are connected with the positive and negative connecting terminals of the sub-modules (1) to enable one switch module (3) to be connected with one sub-module (1) in parallel; the tester (4) controls the on-off of each switch module (3).
7. The field test system for the submodule of the flexible direct current transmission converter valve according to claim 6, is characterized in that: the tester (4) controls the switch modules (3) one by one, or the tester (4) controls the switch modules (3) through a field bus.
8. The field test system for the submodule of the flexible direct current transmission converter valve according to claim 7, is characterized in that: the tester (4) is connected with the connecting device (2) in a wired or wireless mode.
9. The field test system for the submodule of the flexible direct current transmission converter valve according to claim 7, is characterized in that: the tester (4) controls the on-off of the switch module (3) through a relay or a semiconductor device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311148.3A CN114113996A (en) | 2021-11-08 | 2021-11-08 | Flexible direct-current power transmission converter valve submodule field test method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111311148.3A CN114113996A (en) | 2021-11-08 | 2021-11-08 | Flexible direct-current power transmission converter valve submodule field test method and system |
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| CN114113996A true CN114113996A (en) | 2022-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580521A (en) * | 2013-11-18 | 2014-02-12 | 南京南瑞继保电气有限公司 | Multi-level voltage source current converter and control method thereof |
| WO2015081897A1 (en) * | 2013-12-05 | 2015-06-11 | 国家电网公司 | Device and method for testing steady-state operation of mmc flexible direct current sub-module |
| CN105301485A (en) * | 2015-07-29 | 2016-02-03 | 重庆大学 | Multi-IGBT quick power circulation accelerated aging device |
| CN109946600A (en) * | 2019-04-03 | 2019-06-28 | 国网冀北电力有限公司电力科学研究院 | Detect the device and control method of converter valve submodule internal electric performance |
| CN112345844A (en) * | 2020-09-25 | 2021-02-09 | 许继集团有限公司 | Low-voltage testing method and device for flexible direct-current converter valve |
-
2021
- 2021-11-08 CN CN202111311148.3A patent/CN114113996A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580521A (en) * | 2013-11-18 | 2014-02-12 | 南京南瑞继保电气有限公司 | Multi-level voltage source current converter and control method thereof |
| WO2015081897A1 (en) * | 2013-12-05 | 2015-06-11 | 国家电网公司 | Device and method for testing steady-state operation of mmc flexible direct current sub-module |
| CN105301485A (en) * | 2015-07-29 | 2016-02-03 | 重庆大学 | Multi-IGBT quick power circulation accelerated aging device |
| CN109946600A (en) * | 2019-04-03 | 2019-06-28 | 国网冀北电力有限公司电力科学研究院 | Detect the device and control method of converter valve submodule internal electric performance |
| CN112345844A (en) * | 2020-09-25 | 2021-02-09 | 许继集团有限公司 | Low-voltage testing method and device for flexible direct-current converter valve |
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Application publication date: 20220301 |