CN102435907A - Polarity test method for electronic current transformer - Google Patents
Polarity test method for electronic current transformer Download PDFInfo
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- CN102435907A CN102435907A CN2011103373683A CN201110337368A CN102435907A CN 102435907 A CN102435907 A CN 102435907A CN 2011103373683 A CN2011103373683 A CN 2011103373683A CN 201110337368 A CN201110337368 A CN 201110337368A CN 102435907 A CN102435907 A CN 102435907A
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Abstract
The invention relates to a polarity test method for an electronic current transformer. The polarity test method comprises the following steps of: providing a forward pulse signal for a tested electronic current transformer; converting the forward pulse signal into an analogue signal through an output signal of the tested electronic current transformer; and judging the direction of the analogue signal to obtain the polarity of the tested electronic current transformer. According to the polarity test method for the electronic current transformer, which is provided by the invention, a judgment result can be directly obtained from a display interface, the polarity test of a plurality of electronic current transformers can be simultaneously realized and the functions of uploading and issuing the judgment result, carrying out remote cooperation and the like can be achieved; and the polarity test method is simple in operation and can be directly connected with a computer so as to reduce display devices.
Description
Technical field
The present invention relates to a kind of electronic current mutual inductor polarity test method.
Background technology
Because protective relaying device has the different polarities configuration requirement to the polarity of mutual inductor, therefore install or overhaul will be carried out transducer check after having changed mutual inductor in that this protective device is new, whether the configuration of testing its polarity is correct.If the harm that the polar configurations mistake will cause protective device misoperation or tripping to do.If tripping will cause overstep tripping (being upper level protection tripping operation), misoperation causes the serious consequence of mistakenly stop electricity.Because the subtractive polarity mask method mark polarity that electronic current mutual inductor can not use traditional current transformer to adopt; The electronic current mutual inductor body does not have the polarity mark of P1, P2, can not utilize the instantaneous charge-discharge principle of dry cell to detect its polarity when mounted.At present, the electronic mutual inductor of widespread use adopts traditional polarity test method to be difficult to detect in the intelligent substation, and the polarity detection method of field by using is extremely complicated at present, complex operation, wasting manpower and material resources.
Summary of the invention
The object of the present invention is to provide a kind of electronic current mutual inductor polarity test method, it is complicated to overcome existing electronic mutual inductor polarity detecting operation, reduces the shortcoming that detects cost.
For realizing above-mentioned purpose, the present invention provides a kind of electronic current mutual inductor polarity test method, and the step of this method is following:
Pulse signal is provided for tested electronic current mutual inductor;
With the output conversion of signals of described pulse signal through tested electronic current mutual inductor is simulating signal;
Judge that resulting analog signal waveform direction whether for just, draws the polarity of tested electronic current mutual inductor.
Describedly provide the step of pulse signal may further comprise the steps for tested electronic current mutual inductor: the polarity to tested electronic current mutual inductor is preset; Tested electronic current mutual inductor is linked to each other with pulse signal generator, and wherein, the positive pole of pulse signal extremely links to each other with the P1 of this electronic current mutual inductor, and negative pole extremely links to each other with P2.
Resulting analog signal waveform is judged; The step of polarity that draws tested electronic current mutual inductor is specific as follows: with the output conversion of signals of described pulse signal through tested electronic current mutual inductor is simulating signal; Judge that resulting analog signal waveform direction is whether for just; If polarity is for just; Then the polarity of described tested electronic current mutual inductor is consistent with preset polarity, if the waveform of the output signal of tested electronic current mutual inductor and pulse signal direction are negative, then the polarity of described tested electronic current mutual inductor is opposite with preset polarity.
Described method of testing can be used for the polarity test of many electronic current mutual inductors simultaneously.
Described method of testing operating personnel at the scene is equipped with under the situation of computing machine, can reduce display device, connects the direct display result of computing machine, and can realize that judged result uploads, issues, and function such as remote collaboration.
The beneficial effect of the utility model is: electronic current mutual inductor polarity test method proposed by the invention; With the output conversion of signals of described pulse signal through tested electronic current mutual inductor is simulating signal; Judge that resulting analog signal waveform direction whether for just, draws the polarity of tested electronic current mutual inductor.This method is simple to operate, can realize the polarity test of many electronic current mutual inductors simultaneously.
Description of drawings
Fig. 1 is the process flow diagram of electronic current mutual inductor method of testing;
Fig. 2 is the pie graph of electronic current mutual inductor polarity on-site testing device.
Embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
The embodiment of electronic current mutual inductor method of testing of the present invention
The used device of method of testing among the present invention is as shown in Figure 2, comprises pulse producer, signal processing unit and display device, also can replace signal processing unit and display device with computing machine.
According to shown in Figure 1, electronic current mutual inductor method of testing of the present invention is following:
1. at first the polarity of tested electronic current mutual inductor is preset the P1 utmost point and the P2 utmost point of preset tested electronic current mutual inductor.
2. utilize pulse signal generator that one pulse signal is provided; Signal generator can be selected forward low frequency step signal; Make the anode of pulse signal generator link the preset P1 utmost point of said electronic current mutual inductor, the negative terminal of pulse signal generator is linked the preset P2 utmost point of said electronic current mutual inductor.
3. be simulating signal with the output conversion of signals of described pulse signal after through tested electronic current mutual inductor.
4. convert described pulse signal into simulating signal.
5. the waveform with resultant above-mentioned two-way simulating signal compares; If the waveform of the output signal of tested electronic current mutual inductor is a forward; Then the polarity of described tested electronic current mutual inductor is consistent with preset polarity; If the waveform of the output signal of tested electronic current mutual inductor is a negative sense, then the polarity of described tested electronic current mutual inductor is opposite with preset polarity.
This method also can be carried out polarity test to a plurality of electronic current mutual inductors simultaneously, and to be that example describes to n electronic current mutual inductor, its detailed process is following below:
1. the polarity of n tested electronic current mutual inductor is preset, preset the P1 utmost point and the P2 utmost point of each tested electronic current mutual inductor.
2. utilize pulse signal generator that one pulse signal is provided; Make the anode of pulse signal generator link the preset P1 utmost point of described each tested electronic current mutual inductor, the negative terminal of pulse signal generator is linked the preset P2 utmost point of described each tested electronic current mutual inductor.
3. be simulating signal with resulting n road output conversion of signals behind n tested electronic current mutual inductor of described pulse signal process.
4. convert described pulse signal into simulating signal.
5. with the waveform of the simulating signal of the tested electronic current mutual inductor of said n routes that obtains; Judge that its waveform is positive and negative; If waveform is a forward, explain that then the polarity of this tested electronic current mutual inductor is consistent with preset polarity, the waveform of the output signal of tested electronic current mutual inductor is a negative sense; The polarity that this tested electronic current mutual inductor then is described is opposite with preset polarity, thereby judges the polarity of this n tested electronic current mutual inductor.
Claims (5)
1. electronic current mutual inductor polarity test method, it is characterized in that: the step of said method is following:
(1). the direct impulse signal is provided for tested electronic current mutual inductor;
(2). with described pulse signal through the output signal of tested electronic current mutual inductor through converting simulating signal into;
(3). judge resulting analog signal waveform direction, thereby judge the polarity of tested electronic current mutual inductor.
2. according to the said polarity test method of claim 1, it is characterized in that: described step (1) may further comprise the steps:
Polarity to tested electronic current mutual inductor is preset;
Tested electronic current mutual inductor is linked to each other with pulse signal generator, and wherein, the positive pole of pulse signal extremely links to each other with the preset P1 of this electronic current mutual inductor, and negative pole extremely links to each other with preset P2.
3. polarity test method according to claim 1 is characterized in that: the detailed process of described step (3) is following:
Resulting analog signal waveform is shown; If the waveform direction of the output signal of tested electronic current mutual inductor is for just; Then the polarity of described tested electronic current mutual inductor is consistent with preset polarity; If the waveform direction of the output signal of tested electronic current mutual inductor is for negative, then the polarity of described tested electronic current mutual inductor is opposite with preset polarity.
4. according to claim 1,2 or 3 described polarity test methods, it is characterized in that: described method of testing can be used for the polarity test of many electronic current mutual inductors simultaneously.
5. according to claim 1,2 or 3 described polarity test methods; It is characterized in that: described method of testing is under office conditions; Perhaps operating personnel are equipped with under the situation of computing machine, can reduce display device, connect the direct display result of computing machine; And can realize that judged result uploads, issues, and function such as remote collaboration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103373683A CN102435907A (en) | 2011-10-31 | 2011-10-31 | Polarity test method for electronic current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103373683A CN102435907A (en) | 2011-10-31 | 2011-10-31 | Polarity test method for electronic current transformer |
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| CN102435907A true CN102435907A (en) | 2012-05-02 |
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| CN2011103373683A Pending CN102435907A (en) | 2011-10-31 | 2011-10-31 | Polarity test method for electronic current transformer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389483A (en) * | 2013-07-26 | 2013-11-13 | 国家电网公司 | System and method for calibrating polarity of current transformer |
| CN103389439A (en) * | 2013-07-29 | 2013-11-13 | 国家电网公司 | CT (computed tomography) polarity detecting instrument |
| CN104166072A (en) * | 2014-08-22 | 2014-11-26 | 江苏省电力公司常州供电公司 | Intelligent polarity detection device and method for four-star type voltage transformer |
| WO2016026231A1 (en) * | 2014-08-22 | 2016-02-25 | 江苏省电力公司常州供电公司 | Intelligent polarity detection apparatus and method for four-star type voltage transformer |
| CN105652145A (en) * | 2014-12-04 | 2016-06-08 | 国家电网公司 | Method, device and system for testing polarity of electronic mutual inductor |
| CN110244177A (en) * | 2019-07-30 | 2019-09-17 | 广东电网有限责任公司 | A kind of CT polarity tester and test method based on waveform differentiation |
| CN111025189A (en) * | 2020-01-08 | 2020-04-17 | 山东山大电力技术股份有限公司 | Low-current grounding line selection CT test system and test method |
| CN112731219A (en) * | 2020-12-01 | 2021-04-30 | 国网宁夏电力有限公司检修公司 | Polarity testing method, medium and system of mutual inductor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389483A (en) * | 2013-07-26 | 2013-11-13 | 国家电网公司 | System and method for calibrating polarity of current transformer |
| CN103389483B (en) * | 2013-07-26 | 2016-02-17 | 国家电网公司 | A kind of method of the verification current transformer polarity based on current transformer polarity check system |
| CN103389439A (en) * | 2013-07-29 | 2013-11-13 | 国家电网公司 | CT (computed tomography) polarity detecting instrument |
| CN104166072A (en) * | 2014-08-22 | 2014-11-26 | 江苏省电力公司常州供电公司 | Intelligent polarity detection device and method for four-star type voltage transformer |
| WO2016026231A1 (en) * | 2014-08-22 | 2016-02-25 | 江苏省电力公司常州供电公司 | Intelligent polarity detection apparatus and method for four-star type voltage transformer |
| CN104166072B (en) * | 2014-08-22 | 2017-07-18 | 江苏省电力公司常州供电公司 | The intelligent device for detecting polarity of four star-like voltage transformers and detection method |
| CN105652145A (en) * | 2014-12-04 | 2016-06-08 | 国家电网公司 | Method, device and system for testing polarity of electronic mutual inductor |
| CN110244177A (en) * | 2019-07-30 | 2019-09-17 | 广东电网有限责任公司 | A kind of CT polarity tester and test method based on waveform differentiation |
| CN111025189A (en) * | 2020-01-08 | 2020-04-17 | 山东山大电力技术股份有限公司 | Low-current grounding line selection CT test system and test method |
| CN112731219A (en) * | 2020-12-01 | 2021-04-30 | 国网宁夏电力有限公司检修公司 | Polarity testing method, medium and system of mutual inductor |
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Application publication date: 20120502 |