CN113419128A - Converter aging test platform and working method thereof - Google Patents
Converter aging test platform and working method thereof Download PDFInfo
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- CN113419128A CN113419128A CN202110729206.8A CN202110729206A CN113419128A CN 113419128 A CN113419128 A CN 113419128A CN 202110729206 A CN202110729206 A CN 202110729206A CN 113419128 A CN113419128 A CN 113419128A
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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 discloses a converter aging test platform and a working method thereof, and belongs to the technical field of converters. The power supply comprises a first converter, a second converter, a transformer, a circuit breaker and a control system; the circuit breaker is respectively connected with a power supply and the primary side of the transformer, the secondary side of the transformer is connected with the alternating current side of the first converter, the direct current side of the first converter is connected with the direct current side of the second converter, and the alternating current side of the second converter is connected with the alternating current side of the first converter; the first converter, the second converter, the transformer and the circuit breaker are all connected to the control system. According to the invention, the aging test of the two converters can be realized by building a set of test platform and wiring once, so that the test efficiency is improved, and the cost of platform building and equipment investment is reduced. In the test process, energy circularly flows in a loop of the system, so that the power consumption is greatly reduced. The platform is compact in structure, saves space and has a good application prospect compared with the construction of a specific aging test platform.
Description
Technical Field
The invention belongs to the technical field of converters, and particularly relates to a converter aging test platform and a working method thereof.
Background
The development of the energy storage market is accelerated by the double-carbon target, and the reliable stability of the converter is important as a core conversion device of an energy storage system. The full-power aging test is an important component of the reliability test of the converter, and how to improve the aging test efficiency and reduce the test cost has important significance for converter manufacturers.
At present, a motor-driven method is mostly adopted for aging tests of the current transformer, so that the running condition can be simulated really, but for products of a plurality of capacity series, a test platform needs to be established by consuming great cost and place.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a converter aging test platform and a working method thereof, which can efficiently perform an aging test on a converter, and are simple and convenient to operate, low in cost, and small in occupied space.
The invention is realized by the following technical scheme:
the invention discloses a converter aging test platform which comprises a first converter, a second converter, a transformer, a circuit breaker and a control system, wherein the first converter is connected with the second converter through a first connecting line; the circuit breaker is respectively connected with a power supply and the primary side of the transformer, the secondary side of the transformer is connected with the alternating current side of the first converter, the direct current side of the first converter is connected with the direct current side of the second converter, and the alternating current side of the second converter is connected with the alternating current side of the first converter; the first converter, the second converter, the transformer and the circuit breaker are all connected to the control system.
Preferably, the circuit breaker is a three-phase alternating current circuit breaker.
Preferably, the power supply is an ac mains.
Preferably, the transformer has a transformation ratio of 1: 1.
Preferably, the first converter and the second converter are both three-phase three-level T-shaped topological structures.
Preferably, the parameters of the first current transformer and the second current transformer are consistent.
Preferably, the control system has a timer module built in.
Preferably, the first converter and the second converter have a direct current source and two control modes of charging and discharging.
The working method of the converter aging test platform disclosed by the invention comprises the following steps of: setting a first converter to be in a direct current source mode, setting a second converter to be in a charging or discharging mode, closing a breaker, and operating for a mode period in a full-power state; the breaker is disconnected, the second converter is set to be in a direct-current source mode, the first converter is in a charging or discharging mode, the breaker is closed, and the breaker runs for a test period in a full-power state; the first converter and the second converter provide a constant voltage state at a direct current side in a direct current source mode; the first converter and the second converter work in a rectification state controlled by a voltage and current double loop in a charging mode; the first current transformer and the second current transformer work in an inversion state of a single current loop in a discharging mode; and circulating the modes until the aging test is completed.
Preferably, one mode period is 1.5 to 2.5 hours.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the converter aging test platform disclosed by the invention, the aging test of two converters can be realized by building one set of test platform and wiring once, the test efficiency is improved, and the cost of platform building and equipment investment is reduced. In the test process, energy circularly flows in a loop of the system, so that the power consumption is greatly reduced. The platform is compact in structure, saves space and has a good application prospect compared with the construction of a specific aging test platform.
Furthermore, the transformation ratio of the transformer is 1:1, so that an isolation effect can be achieved, and the safety of the system is improved.
Furthermore, parameters of the first converter and the second converter are consistent, so that the situation that the test result is influenced due to the fact that the working states are greatly different is avoided; meanwhile, the test platform can be fully utilized.
Furthermore, a timer module is arranged in the control system, so that time can be set, the working mode of the converter can be switched, and the automation degree is high.
The working method of the converter aging test platform disclosed by the invention has the advantages of high automation degree, high test efficiency and low energy consumption.
Furthermore, one mode period is 1.5-2.5 hours, so that the converter can be fully subjected to aging test.
Drawings
FIG. 1 is a topological diagram of a converter aging test platform according to the present invention;
fig. 2 is a schematic diagram of the main circuit of the converter.
In the figure: 1-a first current transformer; 2-a second converter; 3-a transformer; 4-circuit breaker.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the invention:
referring to fig. 1, the platform for testing converter aging of the present invention includes a first converter 1, a second converter 2, a transformer 3, a circuit breaker 4 and a control system; the circuit breaker 4 is respectively connected with a power supply and the primary side of the transformer 3, the secondary side of the transformer 3 is connected with the alternating current side A, B, C of the first converter 1, the direct current side BUS +, N, BUS-of the first converter 1 is correspondingly connected with the direct current side of the second converter 2, and the alternating current side of the second converter 2 is correspondingly connected with the alternating current side A, B, C of the first converter 1; the first converter 1, the second converter 2, the transformer 3 and the breaker 4 are all connected to the control system through signal lines.
The test platform comprises necessary equipment installation positions, such as the test positions of the first current transformer 1 and the second current transformer 2, and required test instruments and safety devices.
The control system comprises but is not limited to a processor, a memory, a display interface, a communication module and a human-computer interaction interface, wherein the human-computer interaction interface can adopt mechanical keys such as a keyboard and a button, can also adopt a touch screen, and can also adopt a mode of combining the two.
In one embodiment of the present invention, the circuit breaker 4 is a three-phase ac circuit breaker.
In one embodiment of the invention, the power source is an ac power grid.
In one embodiment of the present invention, the transformation ratio of the transformer 3 is 1:1, i.e. the isolation transformer, can perform an isolation function, and improve the safety of the system.
In one embodiment of the present invention, the first converter 1 and the second converter 2 are both three-phase three-level T-type topologies, and the main circuit diagrams thereof are shown in fig. 2.
In a preferred embodiment of the invention, the parameters of the first current transformer 1 and the second current transformer 2 are identical or close.
In a preferred embodiment of the invention, a timer module is built into the control system.
The working method of the converter aging test platform comprises the following steps:
firstly, setting a first converter 1 to be in a direct current source mode, setting a second converter 2 to be in a charging or discharging mode, closing a breaker 4, wherein during charging, energy flows in a counterclockwise direction, as shown by a dotted arrow, and during discharging, energy flows in a clockwise direction, as shown by a solid arrow, and operating for a mode period in a full power state; the circuit breaker 4 is opened, the second converter 2 is set to be in a direct current source mode, the first converter 1 is in a charging or discharging mode, the circuit breaker 4 is closed, energy flows clockwise during charging, energy flows counterclockwise during discharging, and the circuit breaker runs for a test period in a full-power state as indicated by a dotted arrow; and circulating the modes until the aging test is completed.
The first converter 1 and the second converter 2 provide a direct current side constant voltage state in a direct current source mode; the first converter 1 and the second converter 2 work in a rectification state of voltage and current double-loop control in a charging mode; the first converter 1 and the second converter 2 work in the inversion state of single current loop in the discharging mode.
One mode period is 1.5 to 2.5 hours, and one mode period is generally set to 2 hours.
The above description is only a part of the embodiments of the present invention, and although some terms are used in the present invention, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention and are to be construed as any additional limitation which is not in accordance with the spirit of the invention. The foregoing is merely an illustration of the present invention for the purpose of providing an easy understanding and is not intended to limit the present invention to the particular embodiments disclosed herein, and any technical extensions or innovations made herein are protected by the present invention.
Claims (10)
1. The converter aging test platform is characterized by comprising a first converter (1), a second converter (2), a transformer (3), a circuit breaker (4) and a control system; the circuit breaker (4) is respectively connected with a power supply and the primary side of the transformer (3), the secondary side of the transformer (3) is connected with the alternating current side of the first converter (1), the direct current side of the first converter (1) is connected with the direct current side of the second converter (2), and the alternating current side of the second converter (2) is connected with the alternating current side of the first converter (1); the first converter (1), the second converter (2), the transformer (3) and the circuit breaker (4) are all connected to the control system.
2. Converter ageing test platform according to claim 1, characterized in that the circuit breaker (4) is a three-phase ac circuit breaker.
3. The converter aging test platform of claim 1, wherein the power source is an ac grid.
4. Converter ageing test platform according to claim 1, characterized in that the transformer (3) has a transformation ratio of 1: 1.
5. The converter aging test platform according to claim 1, characterized in that the first converter (1) and the second converter (2) are both three-phase three-level T-type topologies.
6. Converter ageing test platform according to claim 1, characterized in that the parameters of the first converter (1) and the second converter (2) are identical.
7. The converter weathering test platform of claim 1 wherein a timer module is built into the control system.
8. The converter aging test platform according to claim 1, characterized in that the first converter (1) and the second converter (2) have two control modes of direct current source and charge and discharge.
9. The working method of the converter aging test platform according to any one of claims 1 to 8, characterized by comprising the following steps: setting a first converter (1) to be in a direct current source mode, setting a second converter (2) to be in a charging or discharging mode, closing a breaker (4), and operating for a mode period in a full-power state; the circuit breaker (4) is opened, the second converter (2) is set to be in a direct current source mode, the first converter (1) is in a charging or discharging mode, the circuit breaker (4) is closed, and the circuit breaker operates for a test period in a full-power state; the first converter (1) and the second converter (2) provide a constant voltage state on a direct current side in a direct current source mode; the first converter (1) and the second converter (2) work in a rectification state of voltage and current double-loop control in a charging mode; the first current transformer (1) and the second current transformer (2) work in an inversion state of a single current loop in a discharging mode; and circulating the modes until the aging test is completed.
10. The working method of the converter aging test platform according to claim 9, wherein one mode period is 1.5 to 2.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729206.8A CN113419128A (en) | 2021-06-29 | 2021-06-29 | Converter aging test platform and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110729206.8A CN113419128A (en) | 2021-06-29 | 2021-06-29 | Converter aging test platform and working method thereof |
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| CN113419128A true CN113419128A (en) | 2021-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116184082A (en) * | 2023-02-10 | 2023-05-30 | 青岛鼎信通讯科技有限公司 | Opposite-dragging test platform and test method for AC/DC micro-grid converter |
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2021
- 2021-06-29 CN CN202110729206.8A patent/CN113419128A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116184082A (en) * | 2023-02-10 | 2023-05-30 | 青岛鼎信通讯科技有限公司 | Opposite-dragging test platform and test method for AC/DC micro-grid converter |
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