CN201489070U - Arrester detecting device - Google Patents
Arrester detecting device Download PDFInfo
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- CN201489070U CN201489070U CN2009202222561U CN200920222256U CN201489070U CN 201489070 U CN201489070 U CN 201489070U CN 2009202222561 U CN2009202222561 U CN 2009202222561U CN 200920222256 U CN200920222256 U CN 200920222256U CN 201489070 U CN201489070 U CN 201489070U
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- lightning arrester
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Abstract
The utility model relates to the field of electric appliance detection, and provides an arrester detecting device used for overcoming the defects in arrestor detection of a capacitive current compensation device and a harmonic analysis device in the prior art. The device comprises an interface, an A/D converter and a selection unit, and is used for analyzing the harmonic component in a digital detection signal transmitted by the A/D converter so as to judge that the resistive current of an arrester to be detected is linear or nonlinear; if the resistive current is linear, a compensation analysis device is started to calculate the magnitude of the resistive current of the arrester at a linear interval and analyze the performance of the arrester; and if the resistive current is nonlinear, the harmonic analysis device is started to calculate the magnitude of the resistive current of the arrester at a nonlinear interval and analyze the performance of the arrester. The arrester detecting device has the advantages that: the advantages and defects of two methods can be balanced, and the interference of the harmonic of a bus on a harmonic method under normal working voltage is greatly reduced.
Description
Technical field
The utility model relates to the security appliance detection range, particularly a kind of lightning arrester pick-up unit.
Background technology
Metal oxide arrester (hereinafter referred MOA) has become the main overvoltage protective device of electric system.Because the zinc oxide resistance sheet of MOA bears working voltage for a long time, leakage current each resistance in series sheet of MOA that continued to flow is arranged, the size of this electric current depends on the degree of aging of the thermally-stabilised and resistor disc of MOA.If the generation deterioration, leakage current will increase, until the punch through damage that develops into MOA.So operating MOA carries out live monitoring, its quality condition of correct judgement is very important.
Common MOA bleeder current measurer device is divided into two kinds by its principle of work: capacitive current compensation method and harmonic analysis method.
Wherein, be illustrated in figure 1 as the structural representation of capacitive current compensation analytical equipment in the prior art, adopt this device to need to introduce reference voltage, be generally busbar voltage, in-site measurement has accident potential dangerous, and the accuracy that interphase interference is measured capacitive current compensation influences obviously.
Be illustrated in figure 2 as the structural representation of frequency analysis device in the prior art, though this method can overcome the influence of interphase interference, but in busbar voltage operate as normal interval, because this moment, current in resistance property was less and exist the interference of busbar voltage harmonic wave simultaneously, so though harmonic analysis method can more accurately reflect current in resistance property when the MOA deterioration, thus in routine duties not the MOA of deterioration may also can measure bigger current in resistance property and cause erroneous judgement.
The utility model content
The utility model embodiment provides a kind of lightning arrester pick-up unit, is used for solving the deficiency that prior art capacitive current compensation device and frequency analysis device detect lightning arrester.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of lightning arrester pick-up unit, and this device comprises: interface is used to receive the measuring-signal of detected lightning arrester; A/D converter, being used for the analog signal conversion by the lightning arrester of interface collection is digital signal; Selected cell is used for analyzing the harmonic components of the digital detection signal that A/D converter sends, if described harmonic components surpasses a threshold value then starts the compensation analytic unit, otherwise starts described frequency analysis unit; Described compensation analytic unit is used to calculate the size of the current in resistance property of described lightning arrester at linearity range, analyzes the performance of this lightning arrester; Described frequency analysis unit is used to calculate the size of the current in resistance property of described lightning arrester at non-linear section, analyzes the performance of this lightning arrester; Display unit is presented at the analysis result of described compensation analytic unit and frequency analysis unit on the display.
According to a further aspect of device described in the utility model, described interface comprises reference voltage interface and lightning arrester leakance interface, described reference voltage interface is used to receive described compensation analytic unit when carrying out analytical calculation used reference voltage; Described lightning arrester leakance interface is used to receive described compensation analytic unit and frequency analysis unit employed lightning arrester leakance when carrying out analytical calculation.
According to another further aspect of device described in the utility model, described selected cell is current just at detected lightning arrester according to the harmonic wave analysis of components in the described lightning arrester leakance.
Another further aspect according to device described in the utility model also comprises storer, estimation unit, input block;
Described interface includes only the lightning arrester leakance interface, is used to receive described lightning arrester leakance;
Described storer, the type and the corresponding capacity current parameter that are used to store lightning arrester;
Described estimation unit is used for the data according to described storer 408 storages, estimates the capacity current parameter of current detected lightning arrester, and sends described capacity current parameter to described compensation analytic unit by described selected cell;
Described input block is connected with described selected cell, is used to import controlled variable.
Another further aspect according to device described in the utility model also comprises detecting unit, is connected with described estimation unit, is used to detect the type of current detected lightning arrester.
The beneficial effect of the utility model embodiment is, because it is whether linear according to current in resistance property by selected cell, capacitive current compensation method and harmonic analysis method are separately used, advantage and defect that can two kinds of methods of balance reduces greatly in the interference of normal working voltage Down Highway harmonic wave to the harmonic wave method.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Figure 1 shows that the structural representation of capacitive current compensation analytical equipment in the prior art;
Figure 2 shows that the structural representation of frequency analysis device in the prior art;
Figure 3 shows that a kind of lightning arrester pick-up unit example structure figure of the utility model embodiment;
Figure 4 shows that a kind of another example structure of lightning arrester pick-up unit figure of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of lightning arrester pick-up unit.Below in conjunction with accompanying drawing the utility model is elaborated.
Be illustrated in figure 3 as a kind of lightning arrester pick-up unit example structure figure of the utility model embodiment.
Wherein, described interface 301 is used to receive the measuring-signal of detected lightning arrester, for example comprises the leakage current of lightning arrester, reference voltage etc.
Described A/D converter 302, the analog signal conversion that is used for the lightning arrester that will be gathered by interface 301 is a digital signal.
Described selected cell 303, be used for analyzing the harmonic components of the digital detection signal that A/D converter 302 sends, judge whether this harmonic components surpasses a threshold value, if surpass described threshold value, think that described lightning arrester is linear, then start described compensation analytic unit 304, if do not surpass described threshold value, think that described lightning arrester is non-linear, then start described frequency analysis unit 305.
Wherein said threshold value can be 2% or 3%, and this threshold value can be set according to the regulation of the relevant quality of power supply of electric system, and for example the total harmonic wave of the above electric pressure of 35KV can not surpass 2%, and then described threshold value is 2%.
Described compensation analytic unit 304 is used to calculate the size of the current in resistance property of described lightning arrester at linearity range, analyzes the performance of this lightning arrester.Wherein, this compensation analytic unit can adopt capacitive current compensation analytic approach of the prior art, for example removes current component conduct the removing capacity current that becomes the pi/2 phase difference with busbar voltage, thereby obtains current in resistance property.
Described frequency analysis unit 305 is used to calculate the size of the current in resistance property of described lightning arrester at non-linear section, analyzes the performance of this lightning arrester.Wherein, this frequency analysis unit can adopt harmonic analysis method of the prior art, for example adopt digitized measurement and frequency analysis, measure circuital each harmonic components, from leakage current, isolate the first-harmonic value of current in resistance property according to current in resistance property harmonic wave and first-harmonic relation.
Described display unit 306 is presented at the analysis result of described compensation analytic unit 304 and frequency analysis unit 305 on the display.
As an embodiment of the present utility model, described interface 301 comprises reference voltage interface and lightning arrester leakance interface, described reference voltage interface is used to receive described compensation analytic unit 304 when carrying out analytical calculation used reference voltage, for example busbar voltage or the detection voltage that uses in order to detect described lightning arrester; Described lightning arrester leakance interface is used to receive described compensation analytic unit 304 and frequency analysis unit 305 employed lightning arrester leakance when carrying out analytical calculation.
As an embodiment of the present utility model, described selected cell 303 is current just at detected lightning arrester according to the harmonic wave analysis of components in the described lightning arrester leakance.
Be illustrated in figure 4 as a kind of another example structure of lightning arrester pick-up unit figure of the utility model embodiment.
Comprise: interface 401, A/D converter 402, selected cell 403, compensation analytic unit 404, frequency analysis unit 405, display unit 406, estimation unit 407, storer 408, input block 409.
Described A/D converter 402, selected cell 403, compensation analytic unit 404, frequency analysis unit 405, display unit 406 is with embodiment illustrated in fig. 3 similar.
Wherein interface 401 includes only the lightning arrester leakance interface, is used to receive described lightning arrester leakance;
Described storer 408, the type and the corresponding capacity current parameter that are used to store lightning arrester.
Described estimation unit 407, be connected with described selected cell 403, be used for data according to described storer 408 storages, estimate the capacity current parameter of current detected lightning arrester, and send described capacity current parameter to described compensation analytic unit 404 by described selected cell 403, be used to calculate the size of the current in resistance property of described lightning arrester, analyze the performance of this lightning arrester at linearity range.
Described input block 409 is connected with described selected cell 403, is used to import controlled variable, for example the parameters such as type of current detected lightning arrester.
As an embodiment of the present utility model, can also comprise a detecting unit 410, be connected with described estimation unit 407, be used to detect the type of current detected lightning arrester.
The beneficial effect of embodiment of the present utility model is, overcome the shortcoming of method of testing commonly used at present, distinguished the characteristic of current in resistance property at linearity range and non-linear section, lightning arrester when being in different qualities adopts distinct methods to detect, and has reduced greatly in the interference of normal working voltage Down Highway harmonic wave to the harmonic wave method.
Through the above description of the embodiments, those skilled in the art can be well understood to the utility model and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical solution of the utility model can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the utility model.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is an embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. lightning arrester pick-up unit is characterized in that this device comprises:
Interface is used to receive the measuring-signal of detected lightning arrester;
A/D converter, being used for the analog signal conversion by the lightning arrester of interface collection is digital signal;
Selected cell is used for analyzing the harmonic components of the digital detection signal that A/D converter sends, if described harmonic components surpasses a threshold value then starts the compensation analytic unit, otherwise starts described frequency analysis unit;
Described compensation analytic unit is used to calculate the size of the current in resistance property of described lightning arrester at linearity range, analyzes the performance of this lightning arrester;
Described frequency analysis unit is used to calculate the size of the current in resistance property of described lightning arrester at non-linear section, analyzes the performance of this lightning arrester;
Display unit is presented at the analysis result of described compensation analytic unit and frequency analysis unit on the display.
2. device according to claim 1 is characterized in that, described interface comprises reference voltage interface and lightning arrester leakance interface, described reference voltage interface is used to receive described compensation analytic unit when carrying out analytical calculation used reference voltage; Described lightning arrester leakance interface is used to receive described compensation analytic unit and frequency analysis unit employed lightning arrester leakance when carrying out analytical calculation.
3. device according to claim 2 is characterized in that, described selected cell is current just at detected lightning arrester according to the harmonic wave analysis of components in the described lightning arrester leakance.
4. device according to claim 1 is characterized in that, also comprises storer, estimation unit, input block;
Described interface includes only the lightning arrester leakance interface, is used to receive described lightning arrester leakance;
Described storer, the type and the corresponding capacity current parameter that are used to store lightning arrester;
Described estimation unit is used for the data according to described storer (408) storage, estimates the capacity current parameter of current detected lightning arrester, and sends described capacity current parameter to described compensation analytic unit by described selected cell;
Described input block is connected with described selected cell, is used to import controlled variable.
5. device according to claim 4 is characterized in that, also comprises detecting unit, is connected with described estimation unit, is used to detect the type of current detected lightning arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222561U CN201489070U (en) | 2009-08-31 | 2009-08-31 | Arrester detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222561U CN201489070U (en) | 2009-08-31 | 2009-08-31 | Arrester detecting device |
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| CN201489070U true CN201489070U (en) | 2010-05-26 |
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| CN2009202222561U Expired - Fee Related CN201489070U (en) | 2009-08-31 | 2009-08-31 | Arrester detecting device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820160A (en) * | 2015-05-08 | 2015-08-05 | 宁夏中科天际防雷技术有限公司 | Lightning protection grounding test system |
| CN105137163A (en) * | 2015-07-29 | 2015-12-09 | 王富元 | Metal oxide varistor(MOV)-type arrester or surge protector resistive leakage current online monitoring method |
| CN105334406A (en) * | 2014-08-07 | 2016-02-17 | 国家电网公司 | Fault detection method and device and fault indicator of lightning arrester |
| CN105548821A (en) * | 2015-11-16 | 2016-05-04 | 国家电网公司 | Lightning arrester live detection method |
| CN106066437A (en) * | 2016-07-08 | 2016-11-02 | 南京信息工程大学 | A kind of on-line monitoring device of metallic oxide arrester and monitoring method thereof |
| CN111751598A (en) * | 2020-06-30 | 2020-10-09 | 国网福建省电力有限公司检修分公司 | Resistive current compensation method for lightning arrester |
-
2009
- 2009-08-31 CN CN2009202222561U patent/CN201489070U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334406A (en) * | 2014-08-07 | 2016-02-17 | 国家电网公司 | Fault detection method and device and fault indicator of lightning arrester |
| CN104820160A (en) * | 2015-05-08 | 2015-08-05 | 宁夏中科天际防雷技术有限公司 | Lightning protection grounding test system |
| CN104820160B (en) * | 2015-05-08 | 2017-10-13 | 宁夏中科天际防雷股份有限公司 | Lightning protection test system |
| CN105137163A (en) * | 2015-07-29 | 2015-12-09 | 王富元 | Metal oxide varistor(MOV)-type arrester or surge protector resistive leakage current online monitoring method |
| WO2017016361A1 (en) * | 2015-07-29 | 2017-02-02 | 王富元 | Online monitoring method for resistive leakage current of metal-oxide-varistor lightning arrester or surge protection device |
| CN105137163B (en) * | 2015-07-29 | 2019-02-15 | 王富元 | The resistive leakage current on-line monitoring method of metal oxide piezoresistive arrester or Surge Protector |
| CN105548821A (en) * | 2015-11-16 | 2016-05-04 | 国家电网公司 | Lightning arrester live detection method |
| CN106066437A (en) * | 2016-07-08 | 2016-11-02 | 南京信息工程大学 | A kind of on-line monitoring device of metallic oxide arrester and monitoring method thereof |
| CN106066437B (en) * | 2016-07-08 | 2018-11-23 | 南京信息工程大学 | A kind of on-line monitoring device of metallic oxide arrester and its monitoring method |
| CN111751598A (en) * | 2020-06-30 | 2020-10-09 | 国网福建省电力有限公司检修分公司 | Resistive current compensation method for lightning arrester |
| CN111751598B (en) * | 2020-06-30 | 2022-09-06 | 国网福建省电力有限公司检修分公司 | Resistive current compensation method for lightning arrester |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20180831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |