CN102636768B - A kind of lightning arrester on-line computing model on-line testing method - Google Patents
A kind of lightning arrester on-line computing model on-line testing method Download PDFInfo
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Abstract
The invention discloses a kind of lightning arrester on-line computing model method of calibration, comprising: when detecting the milliammeter of lightning arrester on-line computing model: current measuring device and lightning arrester on-line computing model are connected in parallel, read the current value of milliammeter and current measuring unit; Judge the milliammeter whether fault of lightning arrester on-line computing model; When detecting the operation counter of lightning arrester on-line computing model, high pressure generator and lightning arrester on-line computing model being connected in parallel, and inputting high-tension current; Judge operation counter whether fault.Owing to can complete the detection of multiple lightning arrester on-line computing model in the present embodiment at the scene of transformer station, timing all lightning arrester on-line computing model are detected can be realized, so the security of transformer station effectively can be improved, and due to all lightning arrester on-line computing model of on-line checkingi can be got final product at transforming plant primary, need not dismantle lightning arrester on-line computing model and transport, so also improve work efficiency, save manpower and materials cost.
Description
Technical field
The present invention relates to field of electrical equipment, particularly a kind of lightning arrester on-line computing model method of calibration.
Background technology
The function of lightning arrester on-line computing model is size and the lightning arrester superpotential number of times of Real-Time Monitoring leakage current of an arrester, to reflect the performance quality of lightning arrester, according to " Diagnostic Examination And Repair of Electric Power Facilities code " not to making regular check on of doing required by lightning arrester on-line computing model itself.
Lightning arrester on-line computing model be in high-voltage alternating electric system with Zinc-Oxide Arrester matching used instrument, it is serially connected in arrester ground loop.Milliammeter in lightning arrester on-line computing model is for monitoring the leakage current by lightning arrester under working voltage, and for judging whether lightning arrester inside makes moist, whether inner member is aging, deteriorated; Operation counter in lightning arrester on-line computing model is for recording the superpotential number of times of lightning arrester.Because lightning arrester on-line computing model is directly connected to the safe operation of relevant lightning arrester, the test therefore for lightning arrester on-line computing model judges that performance quality is very important.
In the maintenance repair work of power equipment, the qualification for lightning arrester on-line computing model is tested and is normally carried out when off-line.Specifically, need first on-line computing model to be separated from ground loop to come, then test is carried out to independently on-line computing model and judge that whether its performance is good.
The shortcoming of prior art is, due in transformer station, include many lightning arrester on-line computing model, fault cannot be found timely by artificial visually examine, and then the periodic detection that also just cannot realize all lightning arrester on-line computing model, so there is very large potential safety hazard.And if all lightning arrester on-line computing model are disassembled from ground loop, then by lightning arrester on-line computing model transport back into row detect, then can waste a large amount of manpower and materials, make work efficiency low.
Summary of the invention
In view of this, embodiments provide a kind of lightning arrester on-line computing model method of calibration, to realize the security of raising transformer station and to improve work efficiency, save the object of manpower and materials cost.
The summary of the invention of the embodiment of the present invention is as follows:
A kind of lightning arrester on-line computing model method of calibration, comprising:
When detecting the milliammeter of lightning arrester on-line computing model:
Current measuring device and described lightning arrester on-line computing model are connected in parallel;
Read the current value of described milliammeter and described current measuring unit respectively;
When deviation between the current value and the current value of described current measuring unit of described milliammeter is greater than setting value, judge the milliammeter fault of described lightning arrester on-line computing model;
When detecting the operation counter of lightning arrester on-line computing model:
High pressure generator and lightning arrester on-line computing model are connected in parallel;
To described lightning arrester on-line computing model input high-tension current;
After input high-tension current, if described operation counter does not carry out respective record, judge the operation counter fault of described lightning arrester on-line computing model.
Preferably, in embodiments of the present invention, described to described lightning arrester on-line computing model input high-tension current, comprising:
Described high-tension current is set to instantaneous pressure electric current, repeatedly to described lightning arrester on-line computing model input high-tension current.
Preferably, in embodiments of the present invention, also step is comprised:
When not having Leakage Current by described lightning arrester on-line computing model, by Leakage Current analogue unit to described lightning arrester on-line computing model input persistent current.
Preferably, in embodiments of the present invention, also comprise:
The conversion between the milliammeter detection of lightning arrester on-line computing model and the operation counter detection of lightning arrester on-line computing model is carried out by switch unit.
Preferably, in embodiments of the present invention, comprising:
The internal resistance of described current measuring unit is set to the internal resistance being less than described lightning arrester on-line computing model.
Preferably, in embodiments of the present invention, comprising:
One of percentage being set to the internal resistance being less than described lightning arrester on-line computing model by the internal resistance of described current measuring unit.
Can be found out by technique scheme, in embodiments of the present invention, when detecting the milliammeter of lightning arrester on-line computing model, by current measuring unit and lightning arrester on-line computing model are connected in parallel, thus the Leakage Current of lightning arrester can be recorded, then, compared by the Leakage Current current value in the Leakage Current current value of lightning arrester that current measuring unit is recorded and lightning arrester on-line computing model, thus learn whether the milliammeter in online lightning arrester on-line computing model breaks down; In addition, when detecting the milliammeter of lightning arrester on-line computing model, in parallel with lightning arrester on-line computing model by unit that simulation is struck by lightning, to lightning arrester on-line computing model input high-tension current, by observation lightning arrester on-line computing model after passing through high-tension current, for reflecting whether lightning arrester can record this high-tension current through the operation counter of superpotential number of times, thus whether the operation counter that can record lightning arrester on-line computing model is normal.
Because the lightning arrester on-line computing model calibration equipment in the embodiment of the present invention can be carried with by testing staff, so after using the lightning arrester on-line computing model method of calibration in the present embodiment, the detection of multiple lightning arrester on-line computing model can be completed at the scene of transformer station, timing all lightning arrester on-line computing model are detected can be realized, so the security of transformer station effectively can be improved, and due to all lightning arrester on-line computing model of on-line checkingi can be got final product at transforming plant primary, need not dismantle lightning arrester on-line computing model and transport, so also effectively improve work efficiency, save a large amount of manpower and materials costs.
Accompanying drawing explanation
Fig. 1 is the step schematic diagram of the on-line computing model of lightning arrester described in embodiment of the present invention method of calibration;
Fig. 2 is the step schematic diagram of the on-line computing model of lightning arrester described in embodiment of the present invention method of calibration;
Fig. 3 is the electrical block diagram of the on-line computing model of lightning arrester described in embodiment of the present invention method of calibration calibration equipment used;
Fig. 4 is the another electrical block diagram of the on-line computing model of lightning arrester described in embodiment of the present invention method of calibration calibration equipment used.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In order to effectively improve the security of transformer station and improve work efficiency, save manpower and materials cost, embodiments provided a kind of lightning arrester on-line computing model method of calibration, comprising:
When detecting the milliammeter of lightning arrester on-line computing model, as shown in Figure 1, comprise step:
S11, current measuring unit and described lightning arrester on-line computing model to be connected in parallel;
S12, read the current value of described milliammeter and described current measuring unit respectively;
When S13, deviation between the current value and the current value of described current measuring unit of described milliammeter are greater than setting value, judge the milliammeter fault of described lightning arrester on-line computing model;
When detecting the operation counter of lightning arrester on-line computing model, as shown in Figure 2, comprise step:
S21, high pressure generator and lightning arrester on-line computing model to be connected in parallel,
S22, to lightning arrester on-line computing model input high-tension current;
S23, input high-tension current after, if described operation counter does not carry out respective record, judge the operation counter fault of described lightning arrester on-line computing model.
In embodiments of the present invention, employ a kind of lightning arrester on-line computing model calibration equipment, as shown in Figure 3, this device comprises current measuring unit 11, simulation thunderbolt unit 12 and power supply unit 13;
Current measuring unit 11 is for being connected in parallel with lightning arrester on-line computing model 14; Simulation thunderbolt unit 12 is for inputting high-tension current to the simulation lightning arrester on-line computing model 14 that unit 12 is connected in parallel that is struck by lightning; Power supply unit 13 is for providing power supply to simulation thunderbolt unit 12.
The main performance of lightning arrester on-line computing model 14 comprises: by the leakage current of milliammeter reflection lightning arrester wherein, in addition, also recorded by lightning arrester through superpotential number of times by operation counter, when these two performance are normal, then can think that lightning arrester on-line computing model is functional, does not exist fault.
In order to make patrolman accurately and easily whether can there is fault by the lightning arrester on-line computing model 14 detected in transformer station, lightning arrester on-line computing model 14 calibration equipment known in the embodiment of the present invention includes current measuring unit 11, simulation thunderbolt unit 12, when detecting the milliammeter of lightning arrester on-line computing model, what wherein current measuring unit 11 was concrete can be reometer, by reometer and lightning arrester on-line computing model 14 are connected in parallel, the detection current value of the Leakage Current of lightning arrester can be recorded by reometer, after the current value reading described milliammeter and described current measuring unit respectively, again the Leakage Current current value shown by this detection current value and lightning arrester on-line computing model 14 is compared, if when the deviation of the Leakage Current detection current value that current measuring unit 11 records and the Leakage Current current value shown by lightning arrester on-line computing model 14 is greater than setting value, then can judge that the milliammeter of lightning arrester on-line computing model 14 is as fault.
Next, when detecting the operation counter in lightning arrester on-line computing model 14, high pressure generator 12 and lightning arrester on-line computing model 14 can be connected in parallel, then high pressure generator 12 is simulated and thunderstorm hour generation superpotential is occurred, and inputs high-tension current to lightning arrester on-line computing model 14; Because the normal lightning arrester on-line computing model 14 of performance is after superpotential, its operation counter can perform corresponding operation of recording.So whether can detect the operation counter of lightning arrester on-line computing model 14 by mould high pressure generator 12 working properly.Concrete, if after input high-tension current, operation counter does not carry out respective record, then can judge that the operation counter of lightning arrester on-line computing model there occurs fault.
Preferably, in embodiments of the present invention, in order to test action counter repeatedly can be realized, to make test result more accurate, the high-tension current that high pressure generator 12 produces can be transient high-voltage discharge stream, like this, the test can carrying out repeatedly to lightning arrester on-line computing model 14, to improve the accuracy of test result.
In another embodiment of the invention, step can also be included:
When not having Leakage Current by described lightning arrester on-line computing model, by Leakage Current analogue unit 15 to described lightning arrester on-line computing model input persistent current:
Leakage Current analogue unit 15 inputs persistent current for being connected in parallel backward lightning arrester on-line computing model with lightning arrester on-line computing model.
After lightning arrester on-line computing model is removed, there is no Leakage Current by lightning arrester on-line computing model, or, in some cases, lightning arrester cannot transmit to lightning arrester on-line computing model the Leakage Current continued, in order to detect the performance of lightning arrester on-line computing model in the above case easily, the embodiment of the present invention can also provide the Leakage Current of simulation to lightning arrester on-line computing model by Leakage Current analogue unit 15.Like this, also can detect lightning arrester on-line computing model when not having Leakage Current by lightning arrester on-line computing model.Concrete, Leakage Current analogue unit 15 can provide power supply by power supply.
In order to must be detected milliammeter and the operation counter of lightning arrester on-line computing model respectively by a power supply, preferably, in embodiments of the present invention, can also step be included:
The conversion between the milliammeter detection of lightning arrester on-line computing model and the operation counter detection of lightning arrester on-line computing model is carried out by switch unit.
As shown in Figure 4, switch unit 16 for switch power supply unit 13 and simulation be struck by lightning unit 12 or, the connection of Leakage Current analogue unit 15.Thus can commutation circuit be passed through, when detecting the milliammeter of lightning arrester on-line computing model 14, switch unit 16 is communicated with Leakage Current analogue unit 15, for Leakage Current analogue unit 15 provides power supply, thus the lasting Leakage Current of simulation can be provided to lightning arrester on-line computing model 14, to complete the detection of the milliammeter of lightning arrester on-line computing model 14.When detecting the operation counter of lightning arrester on-line computing model 14, switch unit 16 is communicated with simulation thunderbolt unit 15, thus simulation thunderbolt unit 15 can be made to produce high pressure, to complete the detection of the operation counter of lightning arrester on-line computing model 14.
Preferably, in order to make when detecting the milliammeter of lightning arrester on-line computing model, data are more accurate, in embodiments of the present invention, also the internal resistance of current measuring unit are set to the internal resistance being less than lightning arrester on-line computing model.
Because the internal resistance of current measuring unit is less, current value measured by it more close to lightning arrester on-line computing model milliammeter should test value, so select the current measuring device that internal resistance value is less in embodiments of the present invention, concrete, when the internal resistance of current measuring unit is set to percent of the internal resistance being less than lightning arrester on-line computing model for the moment, measured value will be more accurate.
Also can use when there is no external power supply to make lightning arrester on-line computing model on-line testing device, in embodiments of the present invention, power supply unit can also include direct supply and inverter, direct supply is dc-battery, for lightning arrester on-line computing model on-line testing device provides power supply after DC current being converted to alternating current by inverter.
In addition, the power supply unit in the embodiment of the present invention can also comprise AC power interface, thus can the AC power of external vicinity easily.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a lightning arrester on-line computing model method of calibration, is characterized in that, comprising:
When detecting the milliammeter of lightning arrester on-line computing model:
Current measuring device and described lightning arrester on-line computing model are connected in parallel;
Read the current value of described milliammeter and described current measuring unit respectively;
When deviation between the current value and the current value of described current measuring unit of described milliammeter is greater than setting value, judge the milliammeter fault of described lightning arrester on-line computing model;
When detecting the operation counter of lightning arrester on-line computing model:
High pressure generator and lightning arrester on-line computing model are connected in parallel;
To described lightning arrester on-line computing model input high-tension current;
After input high-tension current, if described operation counter does not carry out respective record, judge the operation counter fault of described lightning arrester on-line computing model;
Described to described lightning arrester on-line computing model input high-tension current, comprising:
Described high-tension current is set to instantaneous pressure electric current, repeatedly to described lightning arrester on-line computing model input high-tension current;
When not having Leakage Current by described lightning arrester on-line computing model, by Leakage Current analogue unit to described lightning arrester on-line computing model input persistent current.
2. lightning arrester on-line computing model method of calibration according to claim 1, is characterized in that, also comprise:
The conversion between the milliammeter detection of lightning arrester on-line computing model and the operation counter detection of lightning arrester on-line computing model is carried out by switch unit.
3. lightning arrester on-line computing model method of calibration according to claim 2, is characterized in that, comprising:
The internal resistance of described current measuring unit is set to the internal resistance being less than described lightning arrester on-line computing model.
4. lightning arrester on-line computing model method of calibration according to claim 3, is characterized in that, comprising:
One of percentage being set to the internal resistance being less than described lightning arrester on-line computing model by the internal resistance of described current measuring unit.
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| CN103630865A (en) * | 2013-12-20 | 2014-03-12 | 国家电网公司 | Automatic tester of online monitor for electric lightning arrester |
| CN104215862A (en) * | 2014-09-24 | 2014-12-17 | 国网河南省电力公司平顶山供电公司 | Arrester and state discriminated method of online monitoring meter thereof |
| CN104777444B (en) * | 2015-04-14 | 2018-04-06 | 国网辽宁省电力有限公司抚顺供电公司 | Arrester discharge counter comprehensive calibrator and method of calibration |
| CN105676044A (en) * | 2016-04-22 | 2016-06-15 | 南彦勃 | Online test method and system for lightning arrester and monitor thereof |
| CN107037337A (en) * | 2017-04-25 | 2017-08-11 | 四川诺特科技有限公司 | Arrester simulates the test system of true environment |
| CN107589389A (en) * | 2017-10-16 | 2018-01-16 | 国家电网公司 | Arrester discharge counter calibration equipment and method of calibration |
| CN108732526A (en) * | 2018-08-10 | 2018-11-02 | 广东电网有限责任公司 | Arrester charge counter tester and detection device |
| CN109814059A (en) * | 2019-03-18 | 2019-05-28 | 西安旭之辉机电科技有限公司 | A kind of million volts of lightning arrester monitor calibration equipments |
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Inventor after: Dong Jianda Inventor after: Lin Minghui Inventor after: Zhang Guofeng Inventor after: Xu Ke Inventor after: Lv Shibin Inventor after: Sun Long Inventor after: Du Jiayi Inventor after: Chen Zhongmei Inventor after: Wu Yingjun Inventor after: Liu Shuai Inventor after: Weng Hui Inventor after: Mao Yongming Inventor after: Gao Linfeng Inventor after: Shui Yaping Inventor before: Chen Zhongmei Inventor before: Xu Ke Inventor before: Lv Shibin Inventor before: Sun Long Inventor before: Wu Yingjun Inventor before: Liu Shuai Inventor before: Weng Hui Inventor before: Mao Yongming Inventor before: Gao Linfeng Inventor before: Shui Yaping Inventor before: Lin Minghui Inventor before: Zhang Guofeng |
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