CN220381272U - Short circuit test system for wind power converter - Google Patents
Short circuit test system for wind power converter Download PDFInfo
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- CN220381272U CN220381272U CN202321684126.6U CN202321684126U CN220381272U CN 220381272 U CN220381272 U CN 220381272U CN 202321684126 U CN202321684126 U CN 202321684126U CN 220381272 U CN220381272 U CN 220381272U
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 230000016507 interphase Effects 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process 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
- 238000010998 test method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses a short circuit test system of a wind power converter, which comprises a tested converter, an upper computer, a control main board, a short circuit test device for simulating a motor and an electric stress acquisition module for acquiring electric stress of a power module when an interphase short circuit or an interphase ground short circuit occurs, wherein the net side of the tested converter is connected with a power grid, the machine side of the tested converter is connected with the short circuit test device in a three-phase manner, and the short circuit test device comprises a three-phase reactor, an interphase circuit breaker and an interphase ground circuit breaker; the interphase breaker is connected with any two phases of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter; the short circuit test system of the converter can truly reflect the electric stress condition of the power module when the wind power converter is in short circuit in the operation loading process under the condition that the generator is not damaged, truly reflect whether the wind power converter can be protected when the short circuit occurs in the operation period, and reduce the risk in the test.
Description
Technical Field
The utility model relates to the technical field of short circuit test of converters, in particular to a short circuit test system of a wind power converter.
Background
The short circuit test of the wind power converter is mainly applied to the related field of the short circuit test technology of the converter in the new energy industry, and aiming at the limit test working conditions of the converter, the short circuit test belongs to a test mode with higher cost and higher risk in a test means; and there is great limitation, namely can't simulate the short-circuit condition that the true scene takes place, wherein mainly consider the point and lie in: 1. the laboratory motor has limited resources and the generator has high price; 2. the converter is still in a short circuit test stage, and the protection capability of the converter is still uncertain; 3. the uncertainty of the protection capability of the short-circuit test converter in the test phase in turn leads to a too high risk of damage to the motor caused by the test in case of a short-circuit in the connection generator simulating an actual site.
Based on the above consideration, under the condition of open loop wave generation adopted when the short circuit test of the current transformer is carried out, the short circuit between the machine side interphase and the short circuit between the machine side are adopted, and the test method can reflect the protection capability of the short circuit of the current transformer to a certain extent, but the test mode and the real short circuit of the current transformer still have great difference, and the current transformer is in an unloaded stage at the moment of short circuit, so that the limit working condition assessment of the current transformer is still light, and the real condition is difficult to simulate.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a short circuit test system for a wind power converter, which can truly reflect the electric stress condition of a power module when the wind power converter is in short circuit in the operation loading process under the condition that a generator is not damaged, truly reflect whether the wind power converter can be protected when the short circuit occurs in the operation period, and reduce the risk in the test.
In order to solve the technical problems, the utility model provides a short circuit test system of a wind power converter, which comprises a tested converter, a transformer, an upper computer, a control main board, a short circuit test device for simulating a motor and an electric stress acquisition module for acquiring electric stress of a power module when an interphase short circuit or a phase-to-ground short circuit occurs, wherein the network side of the tested converter is connected with a power grid, the machine side of the tested converter is connected with the short circuit test device in a three-phase manner, and the short circuit test device comprises a three-phase reactor, an interphase breaker and a phase-to-ground breaker; the interphase breaker is connected with any two phases of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter; one end of the phase-to-ground circuit breaker is connected with one phase of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter, and the other end of the phase-to-ground circuit breaker is grounded; the tested current transformer comprises a machine side module and a net side module, the machine side module and the net side module are connected through a direct current bus, the electric stress acquisition module is connected with the machine side module and the net side module, and the upper computer is connected with the phase-to-phase breaker or the phase-to-ground breaker through the control main board.
Preferably, when the inter-phase short circuit test is carried out, the inter-phase circuit breaker is conducted, and any two phases of the circuit between the three-phase reactor and the output end of the tested converter are short-circuited; when the phase-ground short circuit test is carried out, the phase-ground circuit breaker is conducted, and a phase of a circuit between the three-phase reactor of the short circuit test device and the output end of the tested converter is in short circuit with the ground.
Preferably, the tested converter further comprises a machine side inductor L1 and a network side inductor L2, the machine side inductor L1 is connected between the machine side module and the input end of the short circuit testing device, and the network side inductor L2 is connected between the network side module and the power grid.
Preferably, the front end of the machine side inductor L1 is connected through a contactor Q1 power grid, the tested converter further comprises a soft start loop, one end of the soft start loop is connected with the direct current bus, and the other end of the soft start loop is connected with the input end of the contactor Q1.
Preferably, the power grid supplies power to the upper computer through a transformer, the upper computer is in communication connection with the tested converter and the electric stress acquisition module, and the control main board further comprises an intermediate relay for controlling the phase-to-phase breaker or the phase-to-ground breaker.
After the system is adopted, the short circuit test system of the wind power converter comprises a tested converter, a transformer, an upper computer, a control main board, a short circuit test device for simulating a motor and an electric stress acquisition module for acquiring electric stress of a power module when the phase is short-circuited or the phase-ground is short-circuited, wherein the net side of the tested converter is connected with a power grid, the machine side of the tested converter is in three-phase connection with the short circuit test device, and the short circuit test device comprises a three-phase reactor, a phase-to-phase breaker and a phase-to-ground breaker; the interphase breaker is connected with any two phases of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter; one end of the phase-to-ground circuit breaker is connected with one phase of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter, and the other end of the phase-to-ground circuit breaker is grounded; the tested current transformer comprises a machine side module and a net side module, the machine side module and the net side module are connected through a direct current bus, the electric stress acquisition module is connected with the machine side module and the net side module, and the upper computer is connected with the phase-to-phase breaker or the phase-to-ground breaker through the control main board; the short circuit test system for the wind power converter can truly reflect the electric stress condition of the power module when the wind power converter is in short circuit in the operation loading process under the condition that a generator is not damaged, truly reflect whether the wind power converter can be protected when the short circuit occurs in the operation period, and reduce the risk in the test.
Drawings
Fig. 1 is an overall circuit diagram of a short circuit test system of a wind power converter.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the application clearer and more obvious, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is an overall circuit diagram of a short circuit test system of a wind power converter according to the present utility model.
The embodiment discloses a short circuit test system of a wind power converter, which comprises a tested converter 11, an upper computer 13, a control main board 14, a short circuit test device 12 for simulating a motor and an electric stress acquisition module 15 for acquiring electric stress of a power module during interphase short circuit or phase-ground short circuit, wherein the network side of the tested converter 11 is connected with a power grid, the machine side of the tested converter 11 is connected with three phases of the short circuit test device 12, and the short circuit test device 12 comprises a three-phase reactor L3, an interphase breaker S1 and a phase-ground breaker S2; the interphase breaker S1 is connected with any two phases of a circuit between the three-phase reactor L3 of the short circuit testing device 12 and the output end of the tested converter 11; one end of the phase-to-ground circuit breaker S2 is connected with one phase of a circuit between the three-phase reactor L3 of the short circuit testing device 12 and the output end of the tested converter 11, and the other end of the phase-to-ground circuit breaker S2 is grounded; the tested converter 11 includes a machine side module 111 and a grid side module 112, the machine side module 111 and the grid side module 112 are connected through a direct current bus, the electric stress acquisition module 15 is connected with the machine side module 111 and the grid side module 112, and the upper computer 13 is connected with the phase-to-phase breaker S1 or the phase-to-ground breaker S2 through the control main board 14.
Example two
In this embodiment, when the inter-phase short circuit test is performed, the inter-phase breaker S1 is turned on, and any two phases of the circuit between the three-phase reactor L3 and the output terminal of the tested converter 11 are short-circuited; when the phase-to-ground short circuit test is performed, the phase-to-ground circuit breaker S2 is turned on, and a circuit between the three-phase reactor L3 of the short circuit test device 12 and the output terminal of the tested converter 11 is short-circuited to one phase and ground.
The upper computer 13 controls the tested converter 11 to load the current value under the test working condition, after the tested converter 11 runs stably, the upper computer selects interphase short circuit or phase-to-ground short circuit, and then gives a closing driving command of the interphase relay corresponding to the control main board 14 to simulate the short circuit test of the wind power converter.
Example III
In this embodiment, the tested converter 11 further includes a machine side inductor L1 and a net side inductor L2, the machine side inductor L1 is connected between the machine side module and the input end of the short circuit testing device, the net side inductor L2 is connected between the net side module and the power grid, and the front end of the machine side inductor L1 is connected with the power grid through a contactor Q1;
in this embodiment, the tested converter 11 further includes a soft start loop, where one end of the soft start loop is connected to the dc bus, and the other end of the soft start loop is connected to the input end of the contactor Q1.
The power grid supplies power to the upper computer 13 through the transformer, the upper computer 13 is in communication connection with the tested converter 11 and the electric stress acquisition module 15, and the control main board 14 further comprises an intermediate relay for controlling the phase-to-phase breaker or the phase-to-ground breaker.
The short circuit test system for the wind power converter can truly reflect the electric stress condition of the power module when the wind power converter is in short circuit in the operation loading process under the condition that a generator is not damaged, truly reflect whether the wind power converter can be protected when the short circuit occurs in the operation period, and reduce the risk in the test.
The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the present application shall fall within the scope of the claims of the present application.
Claims (5)
1. The short circuit test system of the wind power converter is characterized by comprising a tested converter, an upper computer, a control main board, a short circuit test device for simulating a motor and an electric stress acquisition module for acquiring electric stress of a power module when an interphase short circuit or an interphase ground short circuit occurs, wherein the net side of the tested converter is connected with a power grid, the machine side of the tested converter is connected with the short circuit test device in a three-phase manner, and the short circuit test device comprises a three-phase reactor, an interphase circuit breaker and an interphase ground circuit breaker; the interphase breaker is connected with any two phases of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter; one end of the phase-to-ground circuit breaker is connected with one phase of a circuit between the three-phase reactor of the short circuit testing device and the output end of the tested converter, and the other end of the phase-to-ground circuit breaker is grounded; the tested current transformer comprises a machine side module and a net side module, the machine side module and the net side module are connected through a direct current bus, the electric stress acquisition module is connected with the machine side module and the net side module, and the upper computer is connected with the phase-to-phase breaker or the phase-to-ground breaker through the control main board.
2. The short-circuit test system of the wind power converter according to claim 1, wherein when the inter-phase short-circuit test is performed, the inter-phase circuit breaker is conducted, and any two phases of the circuit between the three-phase reactor and the output end of the tested converter are short-circuited; when the phase-ground short circuit test is carried out, the phase-ground circuit breaker is conducted, and a phase of a circuit between the three-phase reactor of the short circuit test device and the output end of the tested converter is in short circuit with the ground.
3. The short circuit test system of a wind power converter according to claim 1, wherein the tested converter further comprises a machine side inductance L1 and a grid side inductance L2, the machine side inductance L1 being connected between the machine side module and an input of the short circuit test device, the grid side inductance L2 being connected between the grid side module and a grid.
4. A wind power converter short circuit test system according to claim 3, wherein the front end of the machine side inductor L1 is connected through a contactor Q1 power grid, the tested converter further comprises a soft start loop, one end of the soft start loop is connected with the direct current bus, and the other end of the soft start loop is connected with the input end of the contactor Q1.
5. The short-circuit test system of a wind power converter according to claim 1, wherein a power grid supplies power to the upper computer through a transformer, the upper computer is in communication connection with the tested converter and the electric stress acquisition module, and the control main board further comprises an intermediate relay for controlling the phase-to-phase breaker or the phase-to-ground breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684126.6U CN220381272U (en) | 2023-06-29 | 2023-06-29 | Short circuit test system for wind power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684126.6U CN220381272U (en) | 2023-06-29 | 2023-06-29 | Short circuit test system for wind power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220381272U true CN220381272U (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321684126.6U Active CN220381272U (en) | 2023-06-29 | 2023-06-29 | Short circuit test system for wind power converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220381272U (en) |
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2023
- 2023-06-29 CN CN202321684126.6U patent/CN220381272U/en active Active
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