CN104181376A - Lightning stroke variety recognition method based on lightning voltage waveform of electric transmission line - Google Patents
Lightning stroke variety recognition method based on lightning voltage waveform of electric transmission line Download PDFInfo
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Abstract
Disclosed is a lightning stroke variety recognition method based on the lightning voltage waveform of an electric transmission line. The method comprises the following steps that (1) the lightning voltage waveform is obtained through a detection device; (2) the overall waveform change condition of the lightning voltage waveform is analyzed to obtain the change condition of the three-phase voltage waveform; (3) the lightning stroke variety is judged according to the change condition, obtained in the step (2), of the three-phase voltage waveform, the lightning stroke is an induction stroke if three-phase voltage waveform changes are close and small in amplitude, the lightning stroke is a winding stroke if the three-phase voltage waveform has no buffer time and the voltage of a certain phase is suddenly increased starting from the lightning stroke moment, and if the three-phase voltage waveform firstly has a low-voltage stage and the voltage of the certain phase is suddenly increased after short time, the lightning stroke is direct lightning. The method has the advantages of being high in recognition speed, easy to implement and high in recognition precision.
Description
Technical field
The present invention relates to power information technical field, particularly, relate to a kind of thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating.
Background technology
Along with transmission line of electricity electric pressure is more and more higher, the height of shaft tower and circuit also constantly lifts, and transmission line lightning stroke fault is more and more frequent.Operating experience shows both at home and abroad, and thunderbolt is the main cause that causes transmission line malfunction, so lightning protection is the important measures of maintenance line security of operation always.Conventional Lighting Protection Measures sets up lightning conducter, lightning rod, reduces pole tower ground resistance, strengthens line insulation, installing lightning arrester etc.Even if but taked above measure, lightning outage rate is still high, its reason is due to the complicacy of thunder and lighting process and causes the reason of lightning strike accident varied, in order to grasp the evolution of lightning performance accurate analysis thunder and lightning, a large amount of monitoring systems of lightning location system and lightning current and lightning surge that adopt are carried out record trouble waveform at present, but because superpotential data are huge, and need expert to do ad hoc analysis, to carry out on-the-spot artificial treatment to it, analysis is difficult, the practicality of this on-Line Monitor Device that has just greatly limited thunder and lightning in fault analysis.Therefore, if can carry out online feature extraction classification to lightning surge waveform, both can fast finding trouble spot, shorten the repair time, realize fast recovery of power supply, can take targeted specifically lightning protection measures again, improve power supply reliability.The differentiation of power transmission line lightning shielding fault type has become the focal issue of lightning protection.And in electric system, the differentiation of direct attack, shielding, induction is very difficult, also there is no effective discriminant approach both at home and abroad.Therefore, lightning surge being carried out to Classification and Identification is of great significance guaranteeing safe operation of power system tool.
Summary of the invention
In order to overcome the defect of prior art, the invention provides a kind of thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating, the method discriminant approach is simple, easily realizes and promotes.
Inventive concept of the present invention is: first with on-line measuring device, detect transmission line of electricity three-phase voltage waveform.If circuit is struck by lightning, can in device, record the voltage waveform to three-phase conducting wire, then utilize by propose according to analysis waveform, thereby finally judge transmission line of lightning strike kind.
A thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating, comprises the following steps:
Step 1: use pick-up unit to obtain lightning voltage waveform;
Step 2: lightning voltage waveform is carried out to the analysis of waveform overall variation situation, obtain three-phase voltage wave form varies situation;
Step 3: the three-phase voltage wave form varies situation judgement thunderbolt kind obtaining according to step 2, if three-phase voltage wave form varies is close, and amplitude is less, is induction thunder; If three-phase voltage waveform has surge time constantly to start certain phase voltage from thunderbolt, not increasing suddenly, is around shocking; If three-phase voltage waveform first has a low pressure stage, after blink, certain phase voltage increases rapidly again, is direct lightning strike.
Three-phase conducting wire position is closely similar on locus with respect to induction thunder lightning strike spot, and induction thunder do not have direct contact power transmission circuit, and less on transmission line of electricity impact, if three-phase voltage wave form varies is close, and amplitude is less, is induction thunder; Around shocking is directly walked around lightning conducter and is got on three-phase conducting wire, does not puncture the transient state process of insulator, if having surge time constantly to start certain phase voltage from thunderbolt, three-phase voltage waveform do not increase suddenly, and be around shocking; Direct lightning strike is directly got on lightning conducter or shaft tower, then punctures certain phase insulator and makes its flashover, if three-phase voltage waveform first has a low pressure stage, after blink, certain phase voltage increases rapidly again, is direct lightning strike.
According to the thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating described in preferred embodiment of the present invention, pick-up unit adopts the voltage transformer (VT) that can monitor transmission line of electricity voltage waveform.
Compared with prior art, beneficial effect of the present invention is as follows:
The first, the present invention only need differentiate three-phase similarity and waveform overall variation situation can be determined thunderbolt kind, and recognition speed is fast, realizes simple.
The second, criterion of the present invention is clear and definite, and accuracy of identification is high, is easily applied in engineering.
The 3rd, the present invention can improve the present situation that present lightning monitoring device can only wave recording can not be differentiated thunder and lightning kind.
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Accompanying drawing explanation
Fig. 1 is the process flow diagram of the induction thunder that the present invention is based on power transmission line lightning shielding corrugating, direct lightning strike, around shocking recognition methods.
Embodiment
Below with reference to accompanying drawing of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description and discussion; obviously; as described herein is only a part of example of the present invention; it is not whole examples; embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to protection scope of the present invention.
Refer to Fig. 1, a kind of thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating, comprises the following steps:
A thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating, comprises the following steps:
Step 1: use pick-up unit to obtain lightning voltage waveform;
Step 2: lightning voltage waveform is carried out to the analysis of waveform overall variation situation, obtain three-phase voltage wave form varies situation;
Step 3: the three-phase voltage wave form varies situation judgement thunderbolt kind obtaining according to step 2, if three-phase voltage wave form varies is close, and amplitude is less, is induction thunder; If three-phase voltage waveform has surge time constantly to start certain phase voltage from thunderbolt, not increasing suddenly, is around shocking; If three-phase voltage waveform first has a low pressure stage, after blink, certain phase voltage increases rapidly again, is direct lightning strike.
If three-phase voltage waveform is close, and amplitude is less, is induction thunder; Not weak three-phase voltage waveform is not close, is likely direct lightning strike and around shocking.Judge before voltage significantly rises to and whether have a voltage coupling process, if had, short time amplitude is low rises to slow voltage coupling process, then certain phase voltage waveform increases rapidly, can be judged to be direct lightning strike, because this process is the presentation of the breakdown front and back of insulator; If voltage, with very fast speed rising, can be judged to be around shocking, because this is the presentation that thunder and lightning directly hits three phase line.
Three-phase conducting wire position is closely similar on locus with respect to induction thunder lightning strike spot, and induction thunder do not have direct contact power transmission circuit, and less on transmission line of electricity impact, if three-phase voltage wave form varies is close, and amplitude is less, is induction thunder; Around shocking is directly walked around lightning conducter and is got on three-phase conducting wire, does not puncture the transient state process of insulator, if having surge time constantly to start certain phase voltage from thunderbolt, three-phase voltage waveform do not increase suddenly, and be around shocking; Direct lightning strike is directly got on lightning conducter or shaft tower, then punctures certain phase insulator and makes its flashover, if three-phase voltage waveform first has a low pressure stage, after blink, certain phase voltage increases rapidly again, is direct lightning strike.
Particularly, pick-up unit adopts the voltage transformer (VT) that can monitor transmission line of electricity voltage waveform.
Disclosed is above only several specific embodiment of the present invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in protection scope of the present invention.
Claims (2)
1. the thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating, is characterized in that, comprises the following steps:
Step 1: use pick-up unit to obtain lightning voltage waveform;
Step 2: lightning voltage waveform is carried out to the analysis of waveform overall variation situation, obtain three-phase voltage wave form varies situation;
Step 3: the three-phase voltage wave form varies situation judgement thunderbolt kind obtaining according to step 2, if three-phase voltage wave form varies is close, and amplitude is less, is induction thunder; If three-phase voltage waveform has surge time constantly to start certain phase voltage from thunderbolt, not increasing suddenly, is around shocking; If three-phase voltage waveform first has a low pressure stage, after blink, certain phase voltage increases rapidly again, is direct lightning strike.
2. the thunderbolt kind recognition methods based on power transmission line lightning shielding corrugating according to claim 1, is characterized in that, described pick-up unit adopts the voltage transformer (VT) that can monitor transmission line of electricity voltage waveform.
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| CN201410412488.9A CN104181376A (en) | 2014-08-20 | 2014-08-20 | Lightning stroke variety recognition method based on lightning voltage waveform of electric transmission line |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN108845177A (en) * | 2018-07-18 | 2018-11-20 | 广东电网有限责任公司 | A kind of lightning stroke monitoring for power distribution network and recognition methods, device and equipment |
| CN112083278A (en) * | 2020-08-23 | 2020-12-15 | 昆明理工大学 | Power distribution network direct lightning strike and inductive lightning identification method based on station-side fault current broadband detection |
| CN112083269A (en) * | 2020-08-12 | 2020-12-15 | 昆明理工大学 | 10kV power distribution network lightning overvoltage identification method based on voltage correlation analysis |
| CN112730964A (en) * | 2020-12-23 | 2021-04-30 | 国网河南省电力公司洛阳供电公司 | Lightning overvoltage identification method based on overvoltage waveform characteristics |
| CN113063993A (en) * | 2021-03-10 | 2021-07-02 | 国网安徽省电力有限公司电力科学研究院 | Lightning trip-out monitoring device and method thereof |
| CN115575783A (en) * | 2022-12-09 | 2023-01-06 | 昆明理工大学 | Multiple Lei Raoji and counterattack recognition method and system for alternating-current power transmission line |
| CN115575726A (en) * | 2022-11-21 | 2023-01-06 | 昆明理工大学 | Method and system for judging multiple lightning stroke properties of power transmission line |
-
2014
- 2014-08-20 CN CN201410412488.9A patent/CN104181376A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN105911433B (en) * | 2016-06-30 | 2018-12-18 | 上海交通大学 | The recognition methods of transmission line lightning stroke type |
| CN108845177A (en) * | 2018-07-18 | 2018-11-20 | 广东电网有限责任公司 | A kind of lightning stroke monitoring for power distribution network and recognition methods, device and equipment |
| CN112083269A (en) * | 2020-08-12 | 2020-12-15 | 昆明理工大学 | 10kV power distribution network lightning overvoltage identification method based on voltage correlation analysis |
| CN112083278A (en) * | 2020-08-23 | 2020-12-15 | 昆明理工大学 | Power distribution network direct lightning strike and inductive lightning identification method based on station-side fault current broadband detection |
| CN112730964A (en) * | 2020-12-23 | 2021-04-30 | 国网河南省电力公司洛阳供电公司 | Lightning overvoltage identification method based on overvoltage waveform characteristics |
| CN113063993A (en) * | 2021-03-10 | 2021-07-02 | 国网安徽省电力有限公司电力科学研究院 | Lightning trip-out monitoring device and method thereof |
| CN115575726A (en) * | 2022-11-21 | 2023-01-06 | 昆明理工大学 | Method and system for judging multiple lightning stroke properties of power transmission line |
| CN115575783A (en) * | 2022-12-09 | 2023-01-06 | 昆明理工大学 | Multiple Lei Raoji and counterattack recognition method and system for alternating-current power transmission line |
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Application publication date: 20141203 |