CN218974488U - Converter aging test system - Google Patents
Converter aging test system Download PDFInfo
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- CN218974488U CN218974488U CN202223422728.2U CN202223422728U CN218974488U CN 218974488 U CN218974488 U CN 218974488U CN 202223422728 U CN202223422728 U CN 202223422728U CN 218974488 U CN218974488 U CN 218974488U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model is suitable for the technical field of testing, and provides a converter aging test system. The converter aging test system comprises: a high-voltage direct-current power supply, a short-circuit reactor and a short-circuit copper bar; the input end of the high-voltage direct-current power supply is connected with an external power supply, and the output end of the high-voltage direct-current power supply is connected with a direct-current bus of the converter to be tested and is used for supplying power to the direct-current bus of the converter to be tested in an aging test; the short-circuit reactor is connected with the machine side of the current transformer to be tested and is used for carrying out short-circuit on the machine side of the current transformer to be tested; the short-seal copper bar is connected with the grid side of the current transformer to be tested and is used for carrying out short seal on the grid side of the current transformer to be tested. The aging test system for the converter can reduce the electric energy consumption in the aging test process, reduce the equipment cost and further reduce the test cost.
Description
Technical Field
The utility model belongs to the technical field of testing, and particularly relates to a converter aging testing system.
Background
The performance of the converter affects the operation of the wind power generation system. It is therefore necessary to burn-in the current transformer before it leaves the factory to test the reliability of the current transformer.
The traditional aging test system comprises high-power electric elements such as a circulating current transformer, a high-voltage switch cabinet and the like, the high-power electric elements have high electric energy consumption in the aging test process, the equipment cost is high, and the test cost is increased.
Disclosure of Invention
The embodiment of the utility model provides a converter aging test system, which aims to solve the technical problems that a high-power electric element in a traditional aging test system has high electric energy consumption and high equipment cost in the aging test process and the test cost is increased.
In a first aspect, an embodiment of the present utility model provides a system for testing aging of a converter, including: a high-voltage direct-current power supply, a short-circuit reactor and a short-circuit copper bar; the input end of the high-voltage direct-current power supply is connected with an external power supply, and the output end of the high-voltage direct-current power supply is connected with a direct-current bus of the converter to be tested and is used for supplying power to the direct-current bus of the converter to be tested in an aging test; the short-circuit reactor is connected with the machine side of the current transformer to be tested and is used for carrying out short-circuit on the machine side of the current transformer to be tested; the short-seal copper bar is connected with the grid side of the current transformer to be tested and is used for carrying out short seal on the grid side of the current transformer to be tested.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: an auxiliary power supply connected with the direct current bus of the converter to be tested; the auxiliary power supply is used for charging the direct current bus of the converter to be tested before the aging test.
With reference to the first aspect, in one possible implementation manner, the dc bus of the converter to be tested includes a positive dc bus and a negative dc bus; the output end of the high-voltage direct current power supply is respectively connected with the positive direct current bus and the negative direct current bus.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: an upper computer; the upper computer is connected with the current transformer to be tested and used for controlling the inversion voltage of the current transformer to be tested and for collecting and displaying the real-time parameters of the current transformer to be tested.
With reference to the first aspect, in one possible implementation manner, the converter to be tested includes a machine side rectifying module and a network side inverting module; the upper computer is used for controlling the inversion voltage of the converter to be tested through the duty ratio of the rectifying module at the control machine side and the duty ratio of the inversion module at the network side.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: a step-up transformer; the input end of the step-up transformer is connected with an external power supply, and the output end of the step-up transformer is connected with the input end of the high-voltage direct-current power supply and is used for supplying power to the high-voltage direct-current power supply.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: a direct current breaker; the direct current breaker is connected between the high-voltage direct current power supply and the direct current bus of the converter to be tested and used for carrying out overcurrent protection on the direct current bus of the converter to be tested.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: a direct current fuse; the direct current fuse is connected between the direct current breaker and the direct current bus of the current transformer to be tested and used for carrying out short-circuit protection on the direct current bus of the current transformer to be tested.
With reference to the first aspect, in one possible implementation manner, the converter burn-in test system further includes: the water cooling device is connected with the converter to be tested; the water cooling device is used for radiating the converter to be tested.
With reference to the first aspect, in one possible implementation manner, the transformation ratio of the step-up transformer is 400V/1140V.
According to the aging test system for the converter, the full-load state of the converter to be tested is simulated to be subjected to aging test, the aging test system only comprises one high-power electric element of the high-voltage direct-current power supply, and the high-voltage direct-current power supply only provides electric energy for the converter to be tested, so that the electric energy consumption in the aging test process is reduced, the equipment cost is reduced, and the test cost is further reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a current transformer aging test system and a current transformer to be tested according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a current transformer burn-in system according to another embodiment of the present application.
Reference numerals:
10: a high voltage DC power supply; 20: a short-sealed reactor; 30: short-sealing copper bars; 40: a step-up transformer; 50: a direct current breaker; 60: a direct current fuse; 70: an auxiliary power supply; 80: a water cooling device; q1: a machine side rectifying module; q2: a network side inversion module; l1: a positive direct current bus; l2: a negative direct current bus; c: DC bus capacitor.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model 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 scope of the utility model.
The performance of the converter affects the operation of the wind power generation system. It is therefore necessary to burn-in the current transformer before it leaves the factory to test the reliability of the current transformer. The traditional aging test system comprises high-power electric elements such as a circulating current transformer, a high-voltage switch cabinet and the like, the high-power electric elements have high electric energy consumption in the aging test process, the equipment cost is high, and the test cost is increased.
Based on the above problems, the embodiment of the application provides a converter aging test system, which is used for performing aging test on a converter to be tested by simulating the full-load state of the converter to be tested, and only comprises a high-power electrical element of a high-voltage direct-current power supply, wherein the high-voltage direct-current power supply only provides the electric energy of the converter to be tested, so that the electric energy consumption in the aging test process is reduced, the equipment cost is reduced, and the test cost is further reduced.
Fig. 1 is a schematic structural diagram of a current transformer aging test system and a current transformer to be tested according to an embodiment of the present application. As shown in fig. 1, the converter to be tested includes a machine side rectifying module Q1 and a grid side inverting module Q2, and the dc bus of the converter to be tested includes a positive dc bus L1 and a negative dc bus L2, where the positive dc bus L1 and the negative dc bus L2 are respectively connected between the machine side rectifying module Q1 and the grid side inverting module Q2. The direct current bus capacitor C is connected between the positive direct current bus L1 and the negative direct current bus L2 and is used for direct current support and direct current filtering.
As shown in fig. 1, the converter burn-in test system includes: a high voltage direct current power supply 10, a short-sealed reactor 20 and a short-sealed copper bar 30.
The input end of the high-voltage direct-current power supply 10 is connected with an external power supply, and the output end of the high-voltage direct-current power supply 10 is connected with a direct-current bus of the converter to be tested and is used for supplying power to the direct-current bus of the converter to be tested in an aging test.
The short-circuit reactor 20 is connected with the machine side of the current transformer to be tested and is used for short-circuit the machine side of the current transformer to be tested. The short-sealed copper bar 30 is connected with the grid side of the converter to be tested and is used for short-sealing the grid side of the converter to be tested.
Alternatively, the external power supply may be a box-type substation for a factory, and may supply ac power. The high-voltage direct-current power supply 10 converts alternating current provided by an external power supply into direct current and is used for supplying power to a direct-current bus of the converter to be tested in the aging test.
As can be seen from the foregoing, the dc bus of the converter to be tested includes a positive dc bus L1 and a negative dc bus L2, and the output end of the high-voltage dc power supply 10 is connected to the positive dc bus L1 and the negative dc bus L2, respectively.
Optionally, the short-sealed reactor 20 and the short-sealed copper bar 30 respectively seal the machine side and the network side of the converter to be tested, so as to simulate the actual running states of the machine side and the network side of the converter to be tested. That is, the loads of the machine side and the network side of the converter to be tested after the short-circuit are infinite, which is equivalent to simulating the full-load state of the converter to be tested, and then the aging test is carried out on the converter to be tested in the full-load state.
In practical application of the to-be-tested converter, the side of the to-be-tested converter is connected with the output end of the wind driven generator, and the inductance of the wind driven generator is high. Therefore, in this embodiment, the short-sealed reactor 20 is selected to short-seal the machine side of the current transformer to be tested, so as to increase the inductance of the machine side of the current transformer to be tested, and meanwhile, the short-sealed reactor 20 can also suppress the current harmonic wave in the circuit, and reduce the current impact. For example, the inductance of the short-circuit reactor 20 may be 300mH.
Optionally, in practical application of the to-be-tested converter, the network side of the to-be-tested converter is connected with the input end of the power grid, so that the inductance is small. Therefore, in this embodiment, the short-sealed copper bar 30 is selected to directly seal the network side of the current transformer to be tested.
Optionally, the converter burn-in system may further include: upper computer (not shown).
The upper computer is connected with the current transformer to be tested and used for controlling the inversion voltage of the current transformer to be tested and for collecting and displaying the real-time parameters of the current transformer to be tested.
As can be seen from the foregoing, the to-be-tested converter includes the machine side rectifying module Q1 and the grid side inverting module Q2, and the upper computer is respectively connected with the machine side rectifying module Q1 and the grid side inverting module Q2, and controls the inverting voltage of the to-be-tested converter by controlling the duty ratio of the machine side rectifying module Q1 and the duty ratio of the grid side inverting module Q2, so that the to-be-tested converter is in a constant voltage state in the aging test. The upper computer can be in communication connection with the converter to be tested in an RS485 wired communication mode.
In the actual aging test, the upper computer configures the inversion voltage of the to-be-tested converter, the machine side and the network side of the to-be-tested converter are respectively inverted, and the generated alternating current starts to age. The upper computer acquires and displays real-time parameters of the current transformer to be tested in the aging test in real time so as to detect the reliability of the current transformer to be tested according to the real-time parameters.
In one possible implementation, referring to fig. 2, the converter burn-in test system may further include: step-up transformer 40.
The input end of the step-up transformer 40 is connected with an external power supply, and the output end of the step-up transformer 40 is connected with the input end of the high-voltage direct-current power supply 10 for supplying power to the high-voltage direct-current power supply 10.
Alternatively, the step-up transformer 40 is used to step up the ac power supplied from the external power supply, and provide the dc power supply 10 with power. For example, the step-up transformer 40 may have a transformation ratio of 400V/1140V, i.e., 1140V of AC power is provided to the HVDC power supply 10.
Optionally, the converter burn-in system may further include: a dc breaker 50.
The dc breaker 50 is connected between the high-voltage dc power supply 10 and a dc bus of the current transformer to be tested, and is used for performing over-current protection on the dc bus of the current transformer to be tested.
Optionally, the converter burn-in system may further include: a dc fuse 60.
The dc fuse 60 is connected between the dc breaker 50 and a dc bus of the current transformer to be tested, and is used for performing short-circuit protection on the dc bus of the current transformer to be tested.
Referring to fig. 2, as can be seen from the foregoing description, the dc bus of the converter to be tested includes the positive dc bus L1 and the negative dc bus L2, and the number of the dc breakers 50 and the dc fuses 60 is two. One of the dc breakers 50 and one of the dc fuses 60 are connected in series and then connected between the high-voltage dc power supply 10 and the positive dc bus L1, and the other of the dc breakers 50 and the other of the dc fuses 60 is connected in series and then connected between the high-voltage dc power supply 10 and the negative dc bus L2.
Optionally, the converter burn-in system may further include: and an auxiliary power supply 70 connected to the dc bus of the current transformer to be tested.
The auxiliary power supply 70 is used for charging the dc bus of the converter to be tested before the burn-in test.
Specifically, the auxiliary power supply 70 is connected to the positive dc bus L1 and the negative dc bus L2, respectively, and is used to charge the dc bus capacitor C between the positive dc bus L1 and the negative dc bus L2 before the burn-in test. That is, before the aging test, the auxiliary power supply 70 pre-charges the dc bus capacitor C of the converter to be tested, so that the voltage of the dc bus of the converter to be tested is close to the voltage of the high-voltage dc power supply 10, and the damage of the dc bus capacitor C and the dc fuse 60 caused by the larger impact current generated at the closing moment of the dc breaker 50 in the aging test is prevented, thereby realizing the protection of the converter to be tested.
Optionally, the converter burn-in system may further include: and a water cooling device 80 connected with the converter to be tested. The water cooling device 80 is used for radiating heat of the converter to be tested.
According to the aging test system for the converter, the full-load state of the converter to be tested is simulated to be subjected to aging test, the aging test system only comprises one high-power electric element of the high-voltage direct-current power supply, and the high-voltage direct-current power supply only provides electric energy for the converter to be tested, so that the electric energy consumption in the aging test process is reduced, the equipment cost is reduced, and the test cost is further reduced.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A converter burn-in system, comprising: a high-voltage direct-current power supply, a short-circuit reactor and a short-circuit copper bar;
the input end of the high-voltage direct-current power supply is connected with an external power supply, and the output end of the high-voltage direct-current power supply is connected with a direct-current bus of the converter to be tested and is used for supplying power to the direct-current bus of the converter to be tested in the aging test;
the short-circuit reactor is connected with the machine side of the converter to be tested and is used for short-circuit the machine side of the converter to be tested; the short-seal copper bar is connected with the network side of the to-be-tested converter and is used for carrying out short seal on the network side of the to-be-tested converter.
2. The converter burn-in system of claim 1, further comprising: an auxiliary power supply connected with the direct current bus of the converter to be tested;
and the auxiliary power supply is used for charging the direct current bus of the converter to be tested before the aging test.
3. The converter burn-in system of claim 1, wherein the dc bus of the converter under test comprises a positive dc bus and a negative dc bus;
and the output end of the high-voltage direct current power supply is respectively connected with the positive direct current bus and the negative direct current bus.
4. The converter burn-in system of claim 1, further comprising: an upper computer;
the upper computer is connected with the converter to be tested and used for controlling the inversion voltage of the converter to be tested and collecting and displaying real-time parameters of the converter to be tested.
5. The converter burn-in system of claim 4 wherein said converter under test comprises a machine side rectifier module and a grid side inverter module;
the upper computer is used for controlling the inversion voltage of the converter to be tested by controlling the duty ratio of the machine side rectifying module and the duty ratio of the network side inversion module.
6. The converter burn-in system of claim 1, further comprising: a step-up transformer;
the input end of the step-up transformer is connected with the external power supply, and the output end of the step-up transformer is connected with the input end of the high-voltage direct-current power supply and is used for supplying power to the high-voltage direct-current power supply.
7. The converter burn-in system of claim 1, further comprising: a direct current breaker;
the direct current circuit breaker is connected between the high-voltage direct current power supply and the direct current bus of the to-be-tested converter and is used for carrying out overcurrent protection on the direct current bus of the to-be-tested converter.
8. The converter burn-in system of claim 7, further comprising: a direct current fuse;
the direct current fuse is connected between the direct current breaker and the direct current bus of the to-be-tested converter and used for carrying out short circuit protection on the direct current bus of the to-be-tested converter.
9. The converter burn-in system of claim 1, further comprising: the water cooling device is connected with the converter to be tested;
the water cooling device is used for radiating the converter to be tested.
10. The converter burn-in system of claim 6 wherein said step-up transformer has a transformation ratio of 400V/1140V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223422728.2U CN218974488U (en) | 2022-12-20 | 2022-12-20 | Converter aging test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223422728.2U CN218974488U (en) | 2022-12-20 | 2022-12-20 | Converter aging test system |
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| Publication Number | Publication Date |
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| CN218974488U true CN218974488U (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223422728.2U Active CN218974488U (en) | 2022-12-20 | 2022-12-20 | Converter aging test system |
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| CN (1) | CN218974488U (en) |
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