CN104090168A - Transformer direct-current resistance and no-load voltage ratio testing device - Google Patents
Transformer direct-current resistance and no-load voltage ratio testing device Download PDFInfo
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- CN104090168A CN104090168A CN201410356548.XA CN201410356548A CN104090168A CN 104090168 A CN104090168 A CN 104090168A CN 201410356548 A CN201410356548 A CN 201410356548A CN 104090168 A CN104090168 A CN 104090168A
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Abstract
The invention discloses a transformer direct-current resistance and no-load voltage ratio testing device. The testing device comprises a direct-current testing power source, a direct-current sampling unit, an alternating-current testing power source, an alternating-current sampling unit, a logic switching unit and a central processing unit, wherein the direct-current testing power source and the direct-current sampling unit are used for conducting direct-current resistance testing, and the alternating-current testing power source and the alternating-current sampling unit are used for conducting no-load voltage ratio testing. The central processing unit conducts switching between the two testing power sources and switching between the two sampling units according to operation commands of a tester through the logic switching unit, and transformer direct-current resistance and no-load voltage ratio testing is accordingly completed. Transformer direct-current resistance and no-load voltage ratio testing can be completed through one-time connection between the device and a transformer, and therefore the detection efficiency of the transformer is improved.
Description
Technical field
The present invention relates to field transformer, relate in particular a kind of DC Resistance of Transformer and transformation ratio test device.
Background technology
At present, DC Resistance of Transformer test and transformer voltage ratio test be transformer interruption maintenance must survey project, complete above-mentioned detection and just need to configure respectively direct-current resistance tester for transformer and transformer voltage ratio tester.Due to the function difference of two kinds of instruments, thereby all need to carry two kinds of instruments while testing at every turn, also need to carry out twice test preliminary work and twice wiring and take out stitches, so just reduced the detection efficiency of transformer.
Summary of the invention
In view of this, the invention provides a kind of DC Resistance of Transformer and no-load voltage ratio pick-up unit, to improve the detection efficiency of transformer.
For achieving the above object, the invention provides following technical scheme:
A kind of DC Resistance of Transformer and transformation ratio test device, comprising:
DC test power supply, described DC test power supply is for exporting DC test electric current to tested transformer;
Alternating-current measurement power supply, described alternating-current measurement power supply is used for to tested transformer output AC measuring current;
Direct current sampling unit, described direct current sampling unit is for gathering the DC feedback signal of tested transformer under the DC test function of current;
AC sampling unit, described AC sampling unit is for gathering the interchange feedback signal of tested transformer under the alternating-current measurement function of current;
The logical switch unit being connected with described DC test power supply, described alternating-current measurement power supply, described direct current sampling unit and described AC sampling unit respectively, described logical switch unit is used between described DC test power supply and described alternating-current measurement power supply, and switches between described direct current sampling unit and described interchange employing unit.
The central processing unit being connected with described logical switch unit, described direct current sampling unit and described AC sampling unit, described central processing unit for according to operational order to described logical switch unit output switching signal, and according to described DC feedback signal and described direct current resistance and the no-load voltage ratio that exchanges feedback signal and calculate tested transformer.
Preferably, described proving installation also comprises: the man-machine interaction unit being connected with described central processing unit.
Preferably, described direct current sampling unit comprises: D.C. current detecting circuit and DC voltage testing circuit.
Preferably, described AC sampling unit comprises: alternating current testing circuit and ac voltage detection circuit.
Preferably, between described direct current sampling unit, described AC sampling unit and described central processing unit, be also provided with described DC feedback signal and the filtering circuit that exchanges feedback signal and carry out filtering processing.
Preferably, described proving installation also comprises: be connected with described central processing unit, and the storage unit of store test data.
Preferably, described storage unit is ferroelectric memory.
Known via above-mentioned technical scheme, compared with prior art, the present invention openly provides a kind of DC Resistance of Transformer and transformation ratio test device.This proving installation comprises DC test power supply and the direct current sampling unit for carrying out direct current resistance test, for carrying out alternating-current measurement power supply and AC sampling unit, logical switch unit and the central processing unit of no-load voltage ratio test.Wherein, central processing unit switches testing power supply and sampling unit by logical switch unit according to tester's operational order, thereby completes the test of DC Resistance of Transformer and no-load voltage ratio.Because this device and transformer primary connection can complete direct current resistance test and the no-load voltage ratio test to transformer, improve the detection efficiency of transformer.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 shows the structural representation of an embodiment of a kind of DC Resistance of Transformer of the present invention and transformation ratio test device;
Fig. 2 shows the structural representation of another embodiment of a kind of DC Resistance of Transformer of the present invention and transformation ratio test device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
After triple channel direct-current resistance tester for transformer can once all be received on transformer by high and low pressure current/voltage p-wire, in test process, need not fall again p-wire, can complete all test events of direct current resistance.And three-phase transformer no-load voltage ratio group tester also needs once high and low pressure current/voltage p-wire all to be received on transformer, complete the test of three-phase no-load voltage ratio.There is the public property of the mode of connection in two kinds of instruments, different is that test philosophy is different, direct resistance metering adopts DC source and direct current sampling, and no-load voltage ratio adopts alternating current source and AC sampling, thereby can lean on soft and hardware to switch the output of two kinds of test sources and the work of two sampling units, realize a proving installation and can test the direct current resistance of transformer and the function of no-load voltage ratio simultaneously.
Embodiment (one)
Show the structural representation of an embodiment of a kind of DC Resistance of Transformer of the present invention and transformation ratio test device referring to Fig. 1.
As shown in Figure 1, this proving installation is integrated with DC test power supply 1, direct current sampling unit 2, alternating-current measurement power supply 3, AC sampling unit 4, logical switch unit 5 and central processing unit 6.
Wherein, DC test power supply 1 and direct current sampling unit 2 are for carrying out direct current resistance test to tested transformer 7.DC test power supply 1 is connected with tested transformer 8 by high-low pressure connection terminal with direct current sampling unit 2, with to tested transformer 8 input direct-current measuring currents and gather the DC feedback signal of tested transformer 8 under the DC test function of current, this DC feedback signal comprises DC voltage feedback signal and DC current feedback signal.Direct current sampling unit 2 is sent to the DC feedback signal collecting in central processing unit 6.Central processing unit 6 calculates the direct current resistance of tested transformer according to the DC feedback signal receiving.
Alternating-current measurement power supply 3 and AC sampling unit 4 are for carrying out no-load voltage ratio test to tested transformer 7.Alternating-current measurement power supply 3 is connected with tested transformer 8 by high-low pressure connection terminal equally with 4, with to tested transformer 8 input AC test signals and gather the interchange feedback signal of tested transformer 8 under the alternating-current measurement function of current.The interchange feedback signal that central processing unit 6 collects according to AC sampling unit 4 is calculated the no-load voltage ratio of tested transformer 8.
It should be noted that, be those skilled in the art's common technology means according to the DC feedback signal of transformer with the direct current resistance and the no-load voltage ratio that exchange feedback signal calculating transformer, and therefore not to repeat here in the present invention.
Can detect direct current resistance and the no-load voltage ratio of tested transformer 8 in order to realize same testing apparatus simultaneously.This device is also provided with logical switch unit 5 in the present invention.
Logical switch unit 5 respectively DC test power supply 1, direct current sampling unit 2, alternating-current measurement power supply 3, AC sampling unit 4 is connected with central processing unit 6.Operating personnel can transmit control signal to central processing unit 6 with controlling change-over switch, and then central processing unit 6 is to logical switch unit 5 output switching signals, to realize DC test power supply 1 and alternating-current measurement power supply 3, and switching between direct current sampling unit 2 and AC sampling unit 4.
Embodiment (two)
In direct current resistance in reality to transformer and the testing process of no-load voltage ratio, DC feedback signal with exchange be usually the interfered impact of signal of feedback signal, reduced the accuracy of detection of device.Impact for fear of undesired signal on test.Show the structural representation of another embodiment of a kind of DC Resistance of Transformer of the present invention and transformation ratio test device referring to Fig. 2.
Different from a upper embodiment, between direct current sampling unit, AC sampling unit and central processing unit, be also provided with filtering circuit 9 in the present embodiment.This filtering circuit 9 can be in real time to DC feedback signal with exchange feedback signal through row filtering processing, the undesired signal of adulterating in disposing DC feedback signal and exchanging feedback signal.
In addition, in the present embodiment, this proving installation also comprises the storer being connected with central processing unit, to store the every data in test process, such as adopting the larger ferroelectric memory of memory space.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the application.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. DC Resistance of Transformer and a transformation ratio test device, is characterized in that, comprising:
DC test power supply, described DC test power supply is for exporting DC test electric current to tested transformer;
Alternating-current measurement power supply, described alternating-current measurement power supply is used for to tested transformer output AC measuring current;
Direct current sampling unit, described direct current sampling unit is for gathering the DC feedback signal of tested transformer under the DC test function of current;
AC sampling unit, described AC sampling unit is for gathering the interchange feedback signal of tested transformer under the alternating-current measurement function of current;
The logical switch unit being connected with described DC test power supply, described alternating-current measurement power supply, described direct current sampling unit and described AC sampling unit respectively, described logical switch unit is used between described DC test power supply and described alternating-current measurement power supply, and switches between described direct current sampling unit and described interchange employing unit;
The central processing unit being connected with described logical switch unit, described direct current sampling unit and described AC sampling unit, described central processing unit for according to operational order to described logical switch unit output switching signal, and according to described DC feedback signal and described direct current resistance and the no-load voltage ratio that exchanges feedback signal and calculate tested transformer.
2. proving installation according to claim 1, is characterized in that, described proving installation also comprises: the man-machine interaction unit being connected with described central processing unit.
3. proving installation according to claim 1, is characterized in that, described direct current sampling unit comprises: D.C. current detecting circuit and DC voltage testing circuit.
4. proving installation according to claim 1, is characterized in that, described AC sampling unit comprises: alternating current testing circuit and ac voltage detection circuit.
5. proving installation according to claim 1, is characterized in that, is also provided with described DC feedback signal and the filtering circuit that exchanges feedback signal and carry out filtering processing between described direct current sampling unit, described AC sampling unit and described central processing unit.
6. proving installation according to claim 1, is characterized in that, described proving installation also comprises: be connected with described central processing unit, and the storage unit of store test data.
7. proving installation according to claim 5, its feature is being, described storage unit is ferroelectric memory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410356548.XA CN104090168A (en) | 2014-07-24 | 2014-07-24 | Transformer direct-current resistance and no-load voltage ratio testing device |
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| CN201410356548.XA CN104090168A (en) | 2014-07-24 | 2014-07-24 | Transformer direct-current resistance and no-load voltage ratio testing device |
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| CN104090168A true CN104090168A (en) | 2014-10-08 |
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| CN201410356548.XA Pending CN104090168A (en) | 2014-07-24 | 2014-07-24 | Transformer direct-current resistance and no-load voltage ratio testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104391210A (en) * | 2014-12-10 | 2015-03-04 | 国家电网公司 | Testing platform of distribution transformer |
| CN104698319A (en) * | 2015-03-20 | 2015-06-10 | 国家电网公司 | Comprehensive tester for transformer parameters |
| CN106324353A (en) * | 2016-08-17 | 2017-01-11 | 国家电网公司 | Inductive filtering converter transformer harmonic wave impedance measurement method and device |
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| CN103558573A (en) * | 2013-11-14 | 2014-02-05 | 中国三冶集团有限公司电气安装工程公司 | Performance testing method for voltage transformer |
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| CN2901330Y (en) * | 2006-04-20 | 2007-05-16 | 青岛艾诺电子仪器有限公司 | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit |
| DE202009012198U1 (en) * | 2009-09-08 | 2010-02-11 | Maschinenfabrik Reinhausen Gmbh | Test drive for tap-changer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391210A (en) * | 2014-12-10 | 2015-03-04 | 国家电网公司 | Testing platform of distribution transformer |
| CN104698319A (en) * | 2015-03-20 | 2015-06-10 | 国家电网公司 | Comprehensive tester for transformer parameters |
| CN106324353A (en) * | 2016-08-17 | 2017-01-11 | 国家电网公司 | Inductive filtering converter transformer harmonic wave impedance measurement method and device |
| CN106324353B (en) * | 2016-08-17 | 2018-10-19 | 国家电网公司 | A kind of induction filtering converter power transformer harmonic impedance measurement method and device |
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