CN108732441A - A kind of aging testing system based on current transformer product - Google Patents
A kind of aging testing system based on current transformer product Download PDFInfo
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- CN108732441A CN108732441A CN201810424126.XA CN201810424126A CN108732441A CN 108732441 A CN108732441 A CN 108732441A CN 201810424126 A CN201810424126 A CN 201810424126A CN 108732441 A CN108732441 A CN 108732441A
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- Prior art keywords
- current transformer
- rectifier
- inverter
- inductance
- product
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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
- G01R31/003—Environmental or reliability tests
Abstract
The present invention provides a kind of aging testing systems based on current transformer product, the ac input end of first rectifier of the first current transformer is connect with power grid, the ac output end of first inverter is connect with the input terminal of LC filter circuits, second rectifier of the second current transformer is connect with the output end of LC filter circuits, the ac output end of second inverter is connected with the primary side winding of isolating transformer, and the vice-side winding of isolating transformer is connect with power grid.Aging testing system of the present invention based on current transformer product, the product of setting, to the circuit dragged, can carry out manufacture test to the product of different capabilities, effectively save space resources, greatly reduce production cost with product.
Description
Technical field
The invention belongs to current transformer fields, more particularly, to a kind of aging testing system based on current transformer product.
Background technology
Current transformer manufacture test in, need test current transformer in each acquisition circuit during full-load run whether
It is abnormal, and the critical component of current transformer is semiconductor IGBT, and the premise of the good stable operation of IGBT is that heat dissipation is good, by
If insufficient can cause device failure etc. occur after product export to ask for the heat dissipation dependence test of current transformer in various reasons
Topic.It is always a big problem of current transformer producer currently for the problem of aging of current transformer product, because for different capabilities
Current transformer needs to set up the relatively high testing stand of cost respectively, currently the problem of aging about current transformer product, using method
It is motor to dragging to obtain method, in this way can be than more actually dry run situation, but for the product of multiple capacity series, need
It expends greatly at establishing testing stand originally.
Invention content
In view of this, the present invention is directed to propose a kind of aging testing system based on current transformer product, is directed to not with solution
Current transformer test with capacity needs to establish testing stand respectively, results in waste of resources, labor intensive, production cost is raised asks
Topic.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of aging testing system based on current transformer product, including the first current transformer, the second current transformer, isolating transformer
With LC filter circuits, first current transformer includes the first rectifier and the first inverter, and second current transformer includes second
Inverter and the second rectifier, the first end that one end of the isolating transformer is respectively connected to power grid, is connected to inductance L1, institute
The first end for stating inductance L1 is grounded through capacitance C1, and second end is through first rectifier, first inverter, inductance L3 connections
To the input terminal of the LC filter circuits, the output ends of the LC filter circuits is through inductance L4, second rectifier, described the
Two inverters are connected to one end of inductance L2, and the other end of the inductance L2 is grounded through capacitance C2, is connected to the isolation respectively
The other end of transformer.
Further, the LC filter circuits include inductance L5 and capacitance C3, and one end of the inductance L5 is respectively connected to
The inductance L3, it is grounded through the capacitance C3, the other end is connected to the inductance L4.
Further, first rectifier and second rectifier are PWM rectifier.
Further, first inverter and second inverter are PWM inverter.
Further, the isolating transformer is shielding isolating transformer.
Compared with the existing technology, the aging testing system of the present invention based on current transformer product has the advantage that：
(1) aging testing system of the present invention based on current transformer product, the product of setting and product are to the electricity that drags
Road can carry out manufacture test to the product of different capabilities, effectively save space resources, greatly reduce production cost.
(2) aging testing system of the present invention based on current transformer product, the first rectifier of setting and second inverse
Become device can effectively control the first current transformer, the second current transformer DC bus-bar voltage stabilization.
(3) the second rectifier of the aging testing system of the present invention based on current transformer product, setting can be effective
The size of entire circuit cycle power is controlled, ensures the accuracy of safety and the test of test system.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the topological diagram of the aging testing system based on current transformer product described in the embodiment of the present invention；
Fig. 2 is second of topological diagram in the embodiment described of the embodiment of the present invention.
Reference sign：
The first current transformers of 1-；The first rectifiers of 11-；The first inverters of 12-；The second current transformers of 2-；The second inverters of 21-；
The second rectifiers of 22-；3- isolating transformers；4-LC filter circuits.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of aging testing system based on current transformer product, as shown in Figure 1, including the first current transformer 1, the second current transformer
2, isolating transformer 3 and LC filter circuits 4, first current transformer 1 includes the first rectifier 11 and the first inverter 12, described
Second current transformer 2 includes that the second inverter 21 and the second rectifier 22, one end of the isolating transformer 3 are respectively connected to electricity
The first end of net, the first end for being connected to inductance L1, the inductance L1 is grounded through capacitance C1, and second end is through first rectifier
11, first inverter 12, inductance L3 are connected to the input terminal of the LC filter circuits 4, the output of the LC filter circuits 4
End is connected to one end of inductance L2 through inductance L4, second rectifier 22, second inverter 21, and the inductance L2's is another
One end is grounded, is connected to respectively the other end of the isolating transformer 3 through capacitance C2.
The LC filter circuits 4 include that inductance L5 and capacitance C3, one end of the inductance L5 are respectively connected to the inductance
L3, it is grounded through the capacitance C3, the other end is connected to the inductance L4.
First rectifier 11 and second rectifier 22 are PWM rectifier.
First inverter 12 and second inverter 21 are PWM inverter.
The ac input end of first rectifier 11 of the first current transformer 1 is connect with power grid, and the exchange of the first inverter 12 is defeated
Outlet is connect with the input terminal of LC filter circuits 4, the output end of the second rectifier 22 and LC filter circuits 4 of the second current transformer 2
Connection, the ac output end of the second inverter 21 are connected with the primary side winding of isolating transformer 3,3 secondary sides of isolating transformer
Winding is connect with power grid.
By three-phase AC grid voltage commutation at steady dc voltage, the first inverter 12 will be stablized first rectifier 11
DC bus-bar voltage be reverse into the alternating current of three phase variable frequency, by 4 unsteady flow three phase sine voltage of LC filter circuits, second
The three phase sine voltage commutation that rectifier 22 exports LC filter circuits 4 is at direct current, then by the second inverter 21 by direct current
Pressure is reverse into three-phase alternating current and completes cycle by 3 foldback of isolating transformer telegram in reply net.
First rectifier, 11 main target is to control the stabilization of 1 DC bus-bar voltage of the first current transformer, the second inverter 21
Main target be control 2 DC bus-bar voltage of the second current transformer stabilization；The main target of first inverter 12 is control LC
The stabilization of 4 output AC voltage of filter circuit, the main target of the second rectifier 22 are to control the power of entire circuit cycle
Size.
The isolating transformer 3 is shielding isolating transformer.
As shown in Fig. 2, for a topology deformation in technical solution, wherein the first rectifier 11 and the second rectifier 22 become
Three-phase uncontrollable rectifier bridge, in order to reach the target of power cycle, the direct current of the first current transformer of target control 1 of the first rectifier 11
Busbar voltage is stablized, and the DC bus-bar voltage of the second current transformer of target control 2 of the second rectifier 22 is stablized, the first inverter 12
4 output AC voltage of target control LC filter circuits stabilization, the control targe of the second inverter 21 is the entire circuit of control
The size of the power of cycle.
A kind of operation principle of the aging testing system based on current transformer product is：
By three-phase AC grid voltage commutation at steady dc voltage, the first inverter 12 will be stablized first rectifier 11
DC bus-bar voltage be reverse into the alternating current of three phase variable frequency, by 4 unsteady flow three phase sine voltage of LC filter circuits, second
The three phase sine voltage commutation that rectifier 22 exports LC filter circuits 4 is at direct current, then by the second inverter 21 by direct current
Pressure is reverse into three-phase alternating current and completes cycle by 3 foldback of isolating transformer telegram in reply net.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of aging testing system based on current transformer product, it is characterised in that：Including the first current transformer (1), the second unsteady flow
Device (2), isolating transformer (3) and LC filter circuits (4),
First current transformer (1) includes the first rectifier (11) and the first inverter (12), and second current transformer (2) includes
One end of second inverter (21) and the second rectifier (22), the isolating transformer (3) is respectively connected to power grid, is connected to electricity
Feel the first end of L1, the first end of the inductance L1 is grounded through capacitance C1, and second end is through first rectifier (11), described the
One inverter (12), inductance L3 are connected to the input terminal of the LC filter circuits (4), the output end of the LC filter circuits (4)
One end of inductance L2 is connected to through inductance L4, second rectifier (22), second inverter (21), the inductance L2's
The other end is grounded, is connected to respectively the other end of the isolating transformer (3) through capacitance C2.
2. a kind of aging testing system based on current transformer product according to claim 1, it is characterised in that：The LC filters
Wave circuit (4) includes that one end of inductance L5 and capacitance C3, the inductance L5 are respectively connected to the inductance L3, through the capacitance C3
Ground connection, the other end are connected to the inductance L4.
3. a kind of aging testing system based on current transformer product according to claim 1, it is characterised in that：Described first
Rectifier (11) and second rectifier (22) are PWM rectifier.
4. a kind of aging testing system based on current transformer product according to claim 1, it is characterised in that：Described first
Inverter (12) and second inverter (21) are PWM inverter.
5. a kind of aging testing system based on current transformer product according to claim 1, it is characterised in that：The isolation
Transformer (3) is shielding isolating transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424126.XA CN108732441A (en) | 2018-05-07 | 2018-05-07 | A kind of aging testing system based on current transformer product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424126.XA CN108732441A (en) | 2018-05-07 | 2018-05-07 | A kind of aging testing system based on current transformer product |
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| Publication Number | Publication Date |
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| CN108732441A true CN108732441A (en) | 2018-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810424126.XA Pending CN108732441A (en) | 2018-05-07 | 2018-05-07 | A kind of aging testing system based on current transformer product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579906A (en) * | 2020-05-19 | 2020-08-25 | 天津瑞能电气有限公司 | High-power inverter test platform |
| CN112924863A (en) * | 2021-01-27 | 2021-06-08 | 臻驱科技（上海）有限公司 | System and method for testing load shedding of motor under test platform |
| CN114076865A (en) * | 2021-09-29 | 2022-02-22 | 广东新昇电业科技股份有限公司 | Converter aging testing system |
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Effective date of registration: 20211022 Address after: 300308 100 Hangtian Road, Airport Economic Zone, Binhai New Area, Tianjin Applicant after: TIANJIN RUIYUAN ELECTRICAL Co.,Ltd. Address before: No.1 Xinghua No.7 Branch Road, economic development zone, Xiqing District, Tianjin Applicant before: Tianjin Ruineng electric Co.,LTD. |
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