CN108132397B - Test system of converter - Google Patents
Test system of converter Download PDFInfo
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- CN108132397B CN108132397B CN201711308497.3A CN201711308497A CN108132397B CN 108132397 B CN108132397 B CN 108132397B CN 201711308497 A CN201711308497 A CN 201711308497A CN 108132397 B CN108132397 B CN 108132397B
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000005265 energy consumption Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003137 locomotive effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction 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
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Abstract
The invention provides a test system of a current transformer. The voltage range of the direct current converter which can be tested by the test system is 700V-5000V DC, and the maximum power of the test system is 800 kVA. The voltage range in which the ac converter can be tested is the voltage range: 280V-3600V AC, 2400kVA (twin trawling test working condition) of the maximum power of the test system, and the frequency range of 45 Hz-66 Hz is continuously, steplessly and adjustably controlled. The voltage and power of the traction converter can meet the requirements of full load tests of various traction converters and auxiliary converters installed on the conventional electric locomotive and internal combustion locomotive. When the full load is tested, the influence of the test system on the three-phase unbalance degree of the public power grid system is ensured to be less than 5%, and the harmonic wave influence (THD) of the whole test system on the public power grid is ensured to be less than 2%.
Description
Technical Field
The invention relates to the technical field of measurement of inverters, in particular to a test system of an inverter.
Background
With the increasingly wide application of converters in the field of rail transit, people have made increasingly higher demands on the performance of converters as a main component in the design of rail vehicles. Therefore, various tests need to be performed on the converter, and whether the function and performance of the converter meet the overall requirements of the auxiliary rail vehicle is verified.
The existing converter test system has large influence on the quality of a public power grid power supply, has a narrow test voltage range, and cannot be matched with tests of various converters.
Disclosure of Invention
The invention provides a test system of a current transformer, which aims to overcome the technical problem.
The invention relates to a test system of a current transformer, which comprises:
the device comprises a rectifying unit, a loading unit and a power supply unit;
the rectifying unit includes: the system comprises a 10kv incoming line switch cabinet, a rectifier transformer and a first rectifying unit;
the input end of the 10kV incoming line switch cabinet is connected with a 10kV bus, the output end of the 10kV incoming line switch cabinet is connected with the rectifier transformer, and the output end of the rectifier transformer is connected with the first rectifying unit; the output end of the first rectifying unit is respectively connected with the loading unit and the power supply unit;
the loading unit includes: the system comprises a first inverter, a second inverter, a first loading motor and a second loading motor; the output ends of the first inverter and the second inverter are respectively connected with the first loading motor and the second loading motor;
the power supply unit includes: the third inverter, the direct current power supply unit and the alternating current power supply unit;
the direct current power supply unit includes: the system comprises a first high-voltage switch cabinet, a single-phase/single-phase voltage regulator and a 3.6KV incoming line switch cabinet;
one end of the first high-voltage switch cabinet is connected with the output end of the third inverter, the other end of the first high-voltage switch cabinet is connected with the single-phase/single-phase voltage regulator, the other end of the single-phase/single-phase voltage regulator is connected with the 3.6KV incoming line switch cabinet, and the other end of the 3.6KV incoming line switch cabinet is connected with a direct-current tested unit;
the alternating current power supply unit includes: the system comprises a second high-voltage switch cabinet, a three-phase/three-phase voltage regulator, a 3.7KV incoming line switch cabinet, a 24-pulse phase-shifting transformer, a 24-pulse rectifying unit and a second rectifying unit;
the 24-pulse phase-shifting transformer comprises a second high-voltage switch cabinet connected with the output end of the third inverter and a three-phase/three-phase voltage regulator connected with the second high-voltage switch, the other end of the three-phase/three-phase voltage regulator is connected with a 3.7KV incoming line switch cabinet, the other end of the 3.7KV incoming line switch cabinet is connected with the 24-pulse phase-shifting transformer, the other end of the 24-pulse phase-shifting transformer is connected with a 24-pulse rectifying unit, the 24-pulse rectifying unit is connected with the second rectifying unit, the other end of the second rectifying unit is connected with an alternating current tested unit, and the 24-pulse rectifying unit is used for rectifying the multi-phase alternating current generated by the 24.
Further, still include:
a test load unit connected with a unit under test, comprising: the device comprises a variable frequency motor, an adjustable analog load, a storage battery pack and an energy consumption resistor.
Further, the 24-pulse rectification unit further includes:
the direct current bus discharging resistor is used for releasing energy when the direct current bus voltage is higher than a threshold value and restoring the direct current bus voltage to a normal voltage value.
The voltage range of the direct current converter which can be tested by the test system is 700V-5000V DC, and the maximum power of the test system is 800 kVA. The voltage range in which the ac converter can be tested is the voltage range: 280V-3600V AC, 2400kVA (twin trawling test working condition) of the maximum power of the test system, and the frequency range of 45 Hz-66 Hz is continuously, steplessly and adjustably controlled. The voltage and power of the traction converter can meet the requirements of full load tests of various traction converters and auxiliary converters installed on the conventional electric locomotive and internal combustion locomotive. When the full load is tested, the influence of the test system on the three-phase unbalance degree of the public power grid system is ensured to be less than 5%, and the harmonic wave influence (THD) of the whole test system on the public power grid is ensured to be less than 2%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test system of the alternator of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a test system of an ac unit of the present invention, and as shown in fig. 1, the system of this embodiment may include:
the device comprises a rectifying unit 1, a loading unit 2 and a power supply unit 3;
the rectifying unit includes: a 10kv incoming line switch cabinet 101, a rectifier transformer 102 and a first rectifying unit 103;
the input end of the 10kV incoming line switch cabinet 101 is connected with a 10kV bus 104, the output end is connected with the rectifier transformer 102, and the output end of the rectifier transformer 102 is connected with the first rectifying unit 103; the output end of the first rectifying unit 103 is respectively connected with the loading unit and the power supply unit;
the loading unit 2 includes: a first inverter 201, a second inverter 202, a first loading motor 203, and a second loading motor 204; the output ends of the first inverter and the second inverter are respectively connected with the first loading motor and the second loading motor;
the power supply unit 3 includes: a third inverter 301, a dc power supply unit 302, and an ac power supply unit 303;
the dc power supply unit 302 includes: a first high voltage switch cabinet 310, a single-phase/single-phase voltage regulator 311, and a 3.6KV inlet switch cabinet 312;
one end of the first high-voltage switch cabinet 310 is connected to the output end of the third inverter 301, the other end of the first high-voltage switch cabinet is connected to the single-phase/single-phase voltage regulator 311, the other end of the single-phase/single-phase voltage regulator 311 is connected to the 3.6KV incoming line switch cabinet 312, and the other end of the 3.6KV incoming line switch cabinet 312 is connected to a direct-current tested unit;
the alternating current power supply unit includes: a second high-voltage switch cabinet 320, a three-phase/three-phase voltage regulator 321, a 3.7KV incoming switch cabinet 322, a 24-pulse phase-shifting transformer 323, a 24-pulse rectifying unit 324, and a second rectifying unit 325;
the 24-pulse phase-shifting transformer comprises a second high-voltage switch cabinet connected with the output end of the third inverter and a three-phase/three-phase voltage regulator connected with the second high-voltage switch, the other end of the three-phase/three-phase voltage regulator is connected with a 3.7KV incoming line switch cabinet, the other end of the 3.7KV incoming line switch cabinet is connected with the 24-pulse phase-shifting transformer, the other end of the 24-pulse phase-shifting transformer is connected with a 24-pulse rectifying unit, the 24-pulse rectifying unit is connected with the second rectifying unit, the other end of the second rectifying unit is connected with an alternating current tested unit, and the 24-pulse rectifying unit is used for rectifying the multi-phase alternating current generated by the 24.
Specifically, the loading unit of the test system is a first inverter, and the second inverter is a 900kW inverter. The first loading motor and the second loading motor are 800kW variable frequency motors. When the converter is tested, the 10kv incoming line switch cabinet 101 is closed first, the first rectifying unit 103 of the test system is started, and then the third inverter 301 in the power supply unit of the test system is started.
When an AC/AC single-phase test is carried out, the first high-voltage switch cabinet 310 is switched on, the second high-voltage switch cabinet 320 is switched off, the first high-voltage switch cabinet and the second high-voltage switch cabinet are interlocked, a power supply is provided for a tested AC current converter, the first inverter 201 of the loading unit of the test system is started according to specific test requirements, and the first loading motor 203 and the second loading motor 204 of the second inverter 202 are loaded in the test process. In the whole test process, the loading unit performs electric energy feedback through the direct current bus of the first rectifying unit 103 of the test system, so that the interference on a superior power grid is reduced. And the first rectifying unit 103 and the third inverter 301 have the capability of outputting 1600W in a single phase, which does not cause three-phase imbalance of the upper grid.
When an AC/DC test is carried out, the second high-voltage switch cabinet 320 is switched on, the first high-voltage switch cabinet 310 is switched off, the first high-voltage switch cabinet and the second high-voltage switch cabinet are interlocked, the 24-pulse phase-shifting transformer 323 supplies power to the second rectifying unit 325, the rectifying unit provides power for the DC/AC converter to be tested, after the tested system is started, the first inverter 201 and the second inverter 202 of the loading unit of the testing system are started to drive the first loading motor 203 and the second loading motor 204 to load in the testing process or load by using an adjustable analog load and a storage battery according to specific testing requirements, and the loading unit carries out electric energy feedback (or energy consumption resistance consumption) through a direct current bus of the rectifying unit 301 of the testing system in the whole testing process, so that the interference on a higher-level power grid is reduced.
The test process is monitored by test board monitoring software, a software test system monitors the states of temperature, switching on and off, current, voltage and the like of all equipment such as a high-voltage switch cabinet, an alternating current-direct current frequency converter, a transformer, a loading motor and the like, a real-time curve can be generated, and test data are stored in a database for subsequent report generation and printing. The TBS software protects the test system according to the monitored real-time data, including but not limited to overtemperature protection of a frequency converter, overtemperature protection of a transformer and interlocking protection of a high-voltage switch; meanwhile, the device is communicated with a tested frequency converter to read the actual state of the device, the device is interlocked and protected with a loading system, and the loading device stops running after a traction unit breaks down, so that dangerous accidents such as galloping and the like of the device are prevented.
Further, still include:
a test load unit connected with a unit under test, comprising: the device comprises a variable frequency motor, an adjustable analog load, a storage battery pack and an energy consumption resistor.
Further, the 24-pulse rectification unit further includes:
the direct current bus discharging resistor is used for releasing energy when the direct current bus voltage is higher than a threshold value and restoring the direct current bus voltage to a normal voltage value.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A test system for a current transformer, comprising:
the device comprises a rectifying unit, a loading unit and a power supply unit;
the rectifying unit includes: the system comprises a 10kv incoming line switch cabinet, a rectifier transformer and a first rectifying unit;
the 10kV incoming line switch cabinet is connected with a 10kV bus, the output end of the 10kV incoming line switch cabinet is connected with the rectifier transformer, and the output end of the rectifier transformer is connected with the first rectifying unit; the output end of the first rectifying unit is respectively connected with the loading unit and the power supply unit;
the loading unit includes: the system comprises a first inverter, a second inverter, a first loading motor and a second loading motor; the output ends of the first inverter and the second inverter are respectively connected with the first loading motor and the second loading motor;
the power supply unit includes: the third inverter, the direct current power supply unit and the alternating current power supply unit;
the alternating current power supply unit includes: the system comprises a first high-voltage switch cabinet, a single-phase/single-phase voltage regulator and a 3.6KV incoming line switch cabinet;
one end of the first high-voltage switch cabinet is connected with the output end of the third inverter, the other end of the first high-voltage switch cabinet is connected with the single-phase/single-phase voltage regulator, the other end of the single-phase/single-phase voltage regulator is connected with the 3.6KV incoming line switch cabinet, the other end of the 3.6KV incoming line switch cabinet is connected with an alternating current tested unit, and the first rectifying unit and the third inverter output in a single phase;
the direct current power supply unit includes: the system comprises a second high-voltage switch cabinet, a three-phase/three-phase voltage regulator, a 3.7KV incoming line switch cabinet, a 24-pulse phase-shifting transformer, a 24-pulse rectifying unit and a second rectifying unit;
the other end of the 24-pulse phase-shifting transformer is connected with the 24-pulse rectifying unit, the 24-pulse rectifying unit is connected with the second rectifying unit, the other end of the second rectifying unit is connected with the direct current tested unit, and the 24-pulse rectifying unit is used for rectifying the multi-phase alternating current generated by the 24-pulse phase-shifting transformer into direct current.
2. The system of claim 1, further comprising:
a test load unit connected with a unit under test, comprising: the variable frequency motor or the adjustable analog load or the storage battery pack or the energy consumption resistor.
3. The system of claim 1 or 2, wherein the 24-pulse rectification unit further comprises:
the direct current bus discharging resistor is used for releasing energy when the direct current bus voltage is higher than a threshold value and restoring the direct current bus voltage to a normal voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711308497.3A CN108132397B (en) | 2017-12-11 | 2017-12-11 | Test system of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711308497.3A CN108132397B (en) | 2017-12-11 | 2017-12-11 | Test system of converter |
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| Publication Number | Publication Date |
|---|---|
| CN108132397A CN108132397A (en) | 2018-06-08 |
| CN108132397B true CN108132397B (en) | 2020-10-30 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100533166C (en) * | 2007-06-29 | 2009-08-26 | 株洲南车时代电气股份有限公司 | Current converter test circuit |
| CN102435899B (en) * | 2011-10-14 | 2015-02-25 | 株洲南车时代电气股份有限公司 | Locomotive traction converter test apparatus and method thereof |
| CN202794404U (en) * | 2012-09-24 | 2013-03-13 | 株洲南车时代电气股份有限公司 | Factory-leaving routine power checking test platform of medium-pressure high-power converter |
| CN103257316B (en) * | 2013-05-17 | 2016-06-15 | 内蒙古久和能源科技有限公司 | A kind of Multifunctional test system of wind turbine generator system |
| WO2016165735A1 (en) * | 2015-04-13 | 2016-10-20 | FeCon GmbH | Method for testing an inverter device or a power converter device |
| CN204536455U (en) * | 2015-04-24 | 2015-08-05 | 永济新时速电机电器有限责任公司 | High power Traction AuCT test system |
| CN204666753U (en) * | 2015-06-15 | 2015-09-23 | 株洲南车时代电气股份有限公司 | A kind of test macro of city track traffic engineering car AuCT |
| CN205787052U (en) * | 2016-06-01 | 2016-12-07 | 北京交通大学 | It is applicable to the track traffic current transformer test platform of multi-standard |
| CN206002663U (en) * | 2016-07-29 | 2017-03-08 | 株洲中达特科电子科技有限公司 | A kind of comprehensive test system being applied to many motors |
| CN106771792B (en) * | 2017-03-29 | 2023-11-03 | 株洲中达特科电子科技有限公司 | Locomotive converter test system |
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