CN204256150U - Mutual inductor testing apparatus - Google Patents

Mutual inductor testing apparatus Download PDF

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Publication number
CN204256150U
CN204256150U CN201420790397.4U CN201420790397U CN204256150U CN 204256150 U CN204256150 U CN 204256150U CN 201420790397 U CN201420790397 U CN 201420790397U CN 204256150 U CN204256150 U CN 204256150U
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China
Prior art keywords
transformer
current
electricity consumption
voltage
mutual inductor
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Application number
CN201420790397.4U
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Chinese (zh)
Inventor
郭鹏武
王小峰
于文洁
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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Priority to CN201420790397.4U priority Critical patent/CN204256150U/en
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Abstract

The utility model provides a kind of mutual inductor testing apparatus.Mutual inductor testing apparatus comprises: experiment power supply, and experiment power supply provides test electricity consumption; Current lifting device, current lifting device is electrically connected with experiment power supply, and current lifting device is used for carrying out up-flow to test electricity consumption, and the test electricity consumption after up-flow is passed into current transformer primary system; Transformer, transformer is electrically connected with experiment power supply, and the no-load voltage ratio of transformer is identical with the no-load voltage ratio of voltage transformer (VT), and transformer is used for carrying out step-down to test electricity consumption, and the test electricity consumption after step-down is passed into voltage transformer secondary system; Relating rule instrument, relating rule instrument is electrically connected respectively with Current Transformer Secondary system and voltage transformer secondary system, and relating rule instrument is measured Current Transformer Secondary system and voltage transformer secondary system simultaneously.The technical solution of the utility model to efficiently solve in prior art and the problem of weak effect loaded down with trivial details for the detection of current transformer.

Description

Mutual inductor testing apparatus
Technical field
The utility model relates to technical field of electric power, in particular to a kind of mutual inductor testing apparatus.
Background technology
Install in transformer station capital construction, later stage of enlarging and retrofit work, need to check the wiring correctness of secondary loop of mutual inductor, verify.Groundwork is the inspection of inspection to Current Transformer Secondary polarity and secondary connection correctness.Usual meeting is after equipment power transmission, and before commencement of commercial operation, band actual load surveys phasor.
Existing Current Transformer Secondary polarity check method is: use battery positive and negative electrode between current transformer primary side two-terminal, frequently carry out " leading to ", " breaking " action, use in Current Transformer Secondary side multimeter to observe the polarity of its Secondary Winding induced voltage, and then judge the secondary connection polarity of current transformer.
The method of secondary wiring of current mutual inductor Correctness checking is: need to allow after equipment live, band actual load surveys phasor.Re-use relay protection check instrument to secondary circuit energising in protection screen, check the correctness of secondary connection.
But above-mentioned detection method is easy to occur causing the problem checking that secondary polarity makes a mistake because of the misoperation of staff.In addition, above-mentioned detection method also must make equipment belt actual load survey phasor, complex operation, cannot obtain the specifying information of secondary loop of mutual inductor wiring correctness simultaneously.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of mutual inductor testing apparatus, to solve in prior art and the problem of weak effect loaded down with trivial details for the detection of current transformer.
To achieve these goals, the utility model provides a kind of mutual inductor testing apparatus, mutual inductor comprises current transformer and voltage transformer (VT), current transformer comprises current transformer primary system summation current transformer electrical secondary system, voltage transformer (VT) comprises voltage transformer (VT) primary system and voltage transformer secondary system, mutual inductor testing apparatus comprises: experiment power supply, and experiment power supply provides test electricity consumption; Current lifting device, current lifting device is electrically connected with experiment power supply, and current lifting device is used for carrying out up-flow to test electricity consumption, and the test electricity consumption after up-flow is passed into current transformer primary system; Transformer, transformer is electrically connected with experiment power supply, and the no-load voltage ratio of transformer is identical with the no-load voltage ratio of voltage transformer (VT), and transformer is used for carrying out step-down to test electricity consumption, and the test electricity consumption after step-down is passed into voltage transformer secondary system; Relating rule instrument, relating rule instrument is electrically connected respectively with Current Transformer Secondary system and voltage transformer secondary system, and relating rule instrument is measured Current Transformer Secondary system and voltage transformer secondary system simultaneously.
Further, mutual inductor testing apparatus also comprises pressure regulator, mutual inductor testing apparatus also comprises pressure regulator, pressure regulator is connected electrically between current lifting device and experiment power supply, before current lifting device carries out up-flow to test electricity consumption, first carry out pressure regulation by pressure regulator to testing electricity consumption and the test electricity consumption after pressure regulation is accessed current lifting device.
Further, relating rule instrument is relay protection relating rule instrument.
Application the technical solution of the utility model, current lifting device carries out up-flow with electric current during analog machine band actual load to experiment power supply, and this electric current is passed into current transformer primary system, and Current Transformer Secondary system correspondingly will produce induction current.Meanwhile, adopt the no-load voltage ratio transformer identical with voltage transformer (VT) with the duty of analog voltage mutual inductor, and the experiment power supply after step-down is accessed voltage transformer secondary system.Finally, relating rule instrument carries out phasor measurement to Current Transformer Secondary system and voltage transformer secondary system simultaneously, obtain the phasor of electric current in Current Transformer Secondary system and the phasor of voltage transformer secondary system voltage, whether the difference comparing the two meets set difference just can judge that whether the wiring of Current Transformer Secondary system is correct.Certainly, whether the polarity of Current Transformer Secondary system is correct also can be found by the comparison of this difference and set difference.If find after comparing difference that the wiring of Current Transformer Secondary system is wrong, the roughly reason that the wiring that can also obtain Current Transformer Secondary system according to the comparison of this difference and set difference goes wrong, so that maintainer overhauls.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The Figure of description forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment according to mutual inductor testing apparatus of the present utility model.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
It should be noted that, mutual inductor comprises current transformer and voltage transformer (VT), and current transformer comprises current transformer primary system summation current transformer electrical secondary system, and voltage transformer (VT) comprises voltage transformer (VT) primary system and voltage transformer secondary system.The detection of usual voltage transformer (VT) completes in advance, ensure that the normal work of voltage transformer (VT) before whether normally detecting current transformer.
The mutual inductor testing apparatus of the present embodiment, this mutual inductor testing apparatus comprises experiment power supply, current lifting device, transformer and relating rule instrument.Wherein, experiment power supply provides test electricity consumption.Current lifting device is electrically connected with experiment power supply, and current lifting device is used for carrying out up-flow to test electricity consumption, and the test electricity consumption after up-flow is passed into current transformer primary system.Transformer is electrically connected with experiment power supply, and the no-load voltage ratio of transformer is identical with the no-load voltage ratio of voltage transformer (VT), and transformer is used for carrying out step-down to test electricity consumption, and the test electricity consumption after step-down is passed into voltage transformer secondary system.Relating rule instrument is electrically connected respectively with Current Transformer Secondary system and voltage transformer secondary system, and relating rule instrument is measured Current Transformer Secondary system and voltage transformer secondary system simultaneously.
As shown in Figure 1, in the present embodiment, current lifting device carries out up-flow with electric current during analog machine band actual load to experiment power supply, and this electric current is passed into current transformer primary system, and Current Transformer Secondary system correspondingly will produce induction current.Meanwhile, adopt the no-load voltage ratio transformer identical with voltage transformer (VT) with the duty of analog voltage mutual inductor, and the experiment power supply after step-down is accessed voltage transformer secondary system.Finally, relating rule instrument carries out phasor measurement to Current Transformer Secondary system and voltage transformer secondary system simultaneously, obtain the phasor of electric current in Current Transformer Secondary system and the phasor of voltage transformer secondary system voltage, whether the difference comparing the two meets set difference just can judge that whether the wiring of Current Transformer Secondary system is correct.Certainly, whether the polarity of Current Transformer Secondary system is correct also can be found by the comparison of this difference and set difference.If find after comparing difference that the wiring of Current Transformer Secondary system is wrong, the roughly reason that the wiring that can also obtain Current Transformer Secondary system according to the comparison of this difference and set difference goes wrong, so that maintainer overhauls.
In order to Current Transformer Secondary system carries out the accuracy of phasor measurement.Mutual inductor testing apparatus also comprises pressure regulator, and pressure regulator is connected electrically between current lifting device and experiment power supply, before current lifting device carries out up-flow to test electricity consumption, is first carried out pressure regulation by pressure regulator to testing electricity consumption and the test electricity consumption after pressure regulation is accessed current lifting device.Like this, experiment power supply just can be adjusted to a suitable value by pressure regulator, just can guarantee the stability of generation current in current transformer primary system, and then ensure that Current Transformer Secondary system carries out the accuracy of phasor measurement.
Preferably, in this mutual inductor testing apparatus, relating rule instrument is relay protection relating rule instrument.
From above description, can find out, the utility model the above embodiments achieve following technique effect: use simulation energising verification Current Transformer Secondary system can compare comprehensive inspection to Current Transformer Secondary system, the polarity of Current Transformer Secondary system can be checked by the method for simulation energising survey phasor, check the no-load voltage ratio of current transformer, check the wiring correctness etc. of Current Transformer Secondary system.Being particularly useful for after transformer station's power transmission cannot the occasion of generating plant outgoing line interval with having measured phasor before the occasion of the electric railway outgoing line interval of sustained load and power transmission.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (3)

1. a mutual inductor testing apparatus, mutual inductor comprises current transformer and voltage transformer (VT), described current transformer comprises current transformer primary system summation current transformer electrical secondary system, described voltage transformer (VT) comprises voltage transformer (VT) primary system and voltage transformer secondary system, it is characterized in that, described mutual inductor testing apparatus comprises:
Experiment power supply, described experiment power supply provides test electricity consumption;
Current lifting device, described current lifting device is electrically connected with described experiment power supply, and described current lifting device is used for carrying out up-flow to described test electricity consumption, and the described test electricity consumption after up-flow is passed into described current transformer primary system;
Transformer, described transformer is electrically connected with described experiment power supply, the no-load voltage ratio of described transformer is identical with the no-load voltage ratio of described voltage transformer (VT), and described transformer is used for carrying out step-down to described test electricity consumption, and the described test electricity consumption after step-down is passed into described voltage transformer secondary system;
Relating rule instrument, described relating rule instrument is electrically connected respectively with described Current Transformer Secondary system and described voltage transformer secondary system, and described relating rule instrument is measured described Current Transformer Secondary system and described voltage transformer secondary system simultaneously.
2. mutual inductor testing apparatus according to claim 1, it is characterized in that, described mutual inductor testing apparatus also comprises pressure regulator, described pressure regulator is connected electrically between described current lifting device and described experiment power supply, before described current lifting device carries out up-flow to described test electricity consumption, first by described pressure regulator pressure regulation is carried out to described test electricity consumption and the described test electricity consumption after pressure regulation is accessed described current lifting device.
3. mutual inductor testing apparatus according to claim 1, is characterized in that, described relating rule instrument is relay protection relating rule instrument.
CN201420790397.4U 2014-12-11 2014-12-11 Mutual inductor testing apparatus Active CN204256150U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420790397.4U CN204256150U (en) 2014-12-11 2014-12-11 Mutual inductor testing apparatus

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Application Number Priority Date Filing Date Title
CN201420790397.4U CN204256150U (en) 2014-12-11 2014-12-11 Mutual inductor testing apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104502879A (en) * 2014-12-11 2015-04-08 国家电网公司 Instrument transformer detection method and instrument transformer detection device
CN106291228A (en) * 2016-08-10 2017-01-04 国网浙江省电力公司金华供电公司 Power transformer enclosure CT no-load voltage ratio polarity test platform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104502879A (en) * 2014-12-11 2015-04-08 国家电网公司 Instrument transformer detection method and instrument transformer detection device
CN104502879B (en) * 2014-12-11 2017-09-22 国家电网公司 Transformer detection method and device
CN106291228A (en) * 2016-08-10 2017-01-04 国网浙江省电力公司金华供电公司 Power transformer enclosure CT no-load voltage ratio polarity test platform

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