CN101436792A - Electricity-fetching method for high voltage overhead transmission line on-line monitoring device - Google Patents
Electricity-fetching method for high voltage overhead transmission line on-line monitoring device Download PDFInfo
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- CN101436792A CN101436792A CNA2008102367325A CN200810236732A CN101436792A CN 101436792 A CN101436792 A CN 101436792A CN A2008102367325 A CNA2008102367325 A CN A2008102367325A CN 200810236732 A CN200810236732 A CN 200810236732A CN 101436792 A CN101436792 A CN 101436792A
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Abstract
The invention relates to a power supply method for on-line equipment of a high-voltage overhead transmission line. The method comprises: taking the overhead transmission line and the ground as a first capacitor C1; constructing a second capacitor C2 near the overhead transmission line; inducing an electrical potential difference by using voltage division effect generated between the first capacitor C1 and the second capacitor C2; and using the electrical potential difference as a power supply to supply power to the on-line equipment. The method is free from influences of electric short circuit, does not require manual hot-line work and has high reliability.
Description
Technical field
The present invention relates to a kind of electricity-fetching method that is used for the aerial high-voltage power transmission line on-line equipment.
Background technology
At present, the on-line condition monitoring device of high voltage overhead line is mainly by storage battery power supply, because accumulator electric-quantity is limited, need artificial live line working periodic replacement storage battery, the up duration that this has not only greatly reduced device has also increased live line working workload and potential personal safety hidden danger.For prolonging the up duration of these devices, just must increase the capacity of the energy, thereby cause the significantly increase of installation weight, limited the practical application of these devices.
For addressing this problem, the researcher has proposed the approach of two kinds of overhead transmission line on-line equipments energy supplement again.First kind is to adopt solar power generation.But because the energy density of solar energy is low, faint energy output has limited the expansion of on-line equipment function, is difficult to satisfy online demands of applications.Second kind is to utilize electric current mutual inductance principle, and the electric current by on the induction transmission pressure obtains power supply.The defective of this method is influenced greatly by line current.When circuit was short-circuited fault, the short circuit current that flows through transmission pressure burnt the rectifier power source of current sensing means in meeting, and reliability is low.Because lack the online power supply of big capacity, high reliability, the application of overhead transmission line on-line equipment is greatly limited.
Summary of the invention
The object of the present invention is to provide a kind of electricity-fetching method for high voltage overhead transmission line on-line monitoring device, be not subjected to the influence of short circuit current, need not artificial live line working, the reliability height.
A kind of electricity-fetching method of high pressure overhead power line on-line equipment, with overhead transmission line and the earth as the first capacitor C1, near overhead transmission line, make up the second capacitor C2, by the partial pressure effects that exists between the first capacitor C1 and the second capacitor C2, induced electricity potential difference on the second capacitor C2 is powered to on-line equipment as power supply with this electrical potential difference.
The described second capacitor C2 is two metallic plates, and two metallic plates are suspended under the overhead transmission line, pass through insulator dielectric between two metallic plates.
The described second capacitor C2 is two metallic plates, and two metallic plates are installed on the electric power line pole tower, and two metallic plates are by insulator and the insulation of electric line bar.
The present invention has the following advantages compared with the prior art:
(1) compare with storage battery, this method can online power taking be a charge in batteries also, need not change storage battery;
(2) compare with solar cell, this method energy density is big, can both reliably power under various weather conditions;
(3) with based on the online electricity-fetching method of electric current mutual inductance principle compare, this method is utilized the voltage power taking of overhead transmission line, is not subjected to the influence of short circuit current, and to the line current no requirement (NR), the air-drop transmission line also can provide required power supply;
(4) since the voltage basic fixed of transmission line near rated voltage, it is little that this method is influenced by system operation mode and short trouble; In addition, because power supply is installed on transmission line below and the shaft tower, under the shielding of lightning conducter, be subjected to effects of lightning less, the reliability height.
Describe operation principle of the present invention in detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is for being suspended on capacitance partial pressure power taking schematic diagram under the overhead transmission line.
Fig. 2 is for being installed in capacitance partial pressure power taking schematic diagram on the electric power line pole tower.
Embodiment
Below in conjunction with accompanying drawing embodiment is elaborated
The second capacitor C2 adopts two metallic plates to realize.Be suspended on two metallic plates under the overhead transmission line or be installed on the electric power line pole tower, keep the insulation between metallic plate and transmission pressure, transmission tower and the metallic plate.The partial pressure effects that exists by electric capacity between the electric capacity that forms between the metallic plate and overhead transmission line and ground forms the induced electricity potential difference between metallic plate then, supplies with on-line equipment with this electrical potential difference as power supply.The electrical potential difference that the induction of interchange overhead transmission line obtains is an alternation, can power after carrying out rectification, amplitude modulation and voltage stabilizing to on-line equipment or to battery charge; The electrical potential difference that the induction of direct current overhead power transmission conducting wire obtains is a direct voltage, can power after carrying out amplitude modulation and voltage stabilizing to on-line equipment or to battery charge.By adjusting the spacing and the installation site of metallic plate, can control the voltage of responding between metallic plate.By adjusting the dimensional parameters of metallic plate, can adjust the internal resistance of source, the power supply capacity of control power supply based on induced voltage.
Fig. 1 is for being suspended on capacitance partial pressure power taking schematic diagram under the overhead transmission line, two metallic plate s1, and s2 is suspended under the overhead transmission line on-line equipment, and keeps insulation each other by insulator T.Electrical potential difference between metallic plate can be incorporated into the power module of on-line equipment from two metallic plate guide lines, be the on-line equipment power supply after nursing one's health.
Fig. 2 is for being installed in electric field induction power taking schematic diagram on the electric power line pole tower, two metallic plate s1, and s2 is installed on the electric power line pole tower, and keeps the insulation of metallic plate and shaft tower by insulator T.Electrical potential difference between metallic plate can be incorporated into the power module of on-line equipment from two metallic plate guide lines, be the on-line equipment power supply after nursing one's health.
The present invention second capacitor C2 is not limited to and adopts two metallic plates to realize, also can adopt polylith metal derby or other conducting block to realize, no matter any form as long as play the capacitor effect, finally reaches partial pressure effects, all in the claimed scope of the present invention.
Claims (4)
1, a kind of high pressure overhead power line on-line equipment electricity-fetching method, it is characterized in that, with overhead transmission line and the earth as the first capacitor C1, near overhead transmission line, make up the second capacitor C2, by the partial pressure effects that exists between the first capacitor C1 and the second capacitor C2, induced electricity potential difference on the second capacitor C2 is powered to on-line equipment as power supply with this electrical potential difference.
2, a kind of high pressure overhead power line on-line equipment electricity-fetching method according to claim 1 is characterized in that, the described second capacitor C2 is two metallic plates, and two metallic plates are suspended under the overhead transmission line, pass through insulator dielectric between two metallic plates.
3, a kind of high pressure overhead power line on-line equipment electricity-fetching method according to claim 1, it is characterized in that, the described second capacitor C2 is two metallic plates, and two metallic plates are installed on the electric power line pole tower, and two metallic plates are by insulator and the insulation of electric line bar.
4, according to claim 1 or 2 or 3 described a kind of high pressure overhead power line on-line equipment electricity-fetching methods, it is characterized in that, described electrical potential difference is carried out being used further to power to on-line equipment after rectification, amplitude modulation and the voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102367325A CN101436792A (en) | 2008-12-09 | 2008-12-09 | Electricity-fetching method for high voltage overhead transmission line on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102367325A CN101436792A (en) | 2008-12-09 | 2008-12-09 | Electricity-fetching method for high voltage overhead transmission line on-line monitoring device |
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| CN101436792A true CN101436792A (en) | 2009-05-20 |
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| CNA2008102367325A Pending CN101436792A (en) | 2008-12-09 | 2008-12-09 | Electricity-fetching method for high voltage overhead transmission line on-line monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522831A (en) * | 2011-12-08 | 2012-06-27 | 辽宁省电力有限公司沈阳超高压分公司 | Non-contact electric field type induction power access method and power access apparatus thereof |
| CN108879973A (en) * | 2018-07-11 | 2018-11-23 | 广东电网有限责任公司 | Ultra-high-tension power transmission line sensing electricity getting device and system |
| CN110286294A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing device and method for monitoring of leaking electricity |
| CN110286293A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing electric leakage monitoring method and system based on leakage current |
| CN112838681A (en) * | 2021-02-03 | 2021-05-25 | 昆明理工大学 | Induction electricity taking device on high-voltage transmission line tower |
-
2008
- 2008-12-09 CN CNA2008102367325A patent/CN101436792A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522831A (en) * | 2011-12-08 | 2012-06-27 | 辽宁省电力有限公司沈阳超高压分公司 | Non-contact electric field type induction power access method and power access apparatus thereof |
| CN108879973A (en) * | 2018-07-11 | 2018-11-23 | 广东电网有限责任公司 | Ultra-high-tension power transmission line sensing electricity getting device and system |
| CN110286294A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing device and method for monitoring of leaking electricity |
| CN110286293A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing electric leakage monitoring method and system based on leakage current |
| CN112838681A (en) * | 2021-02-03 | 2021-05-25 | 昆明理工大学 | Induction electricity taking device on high-voltage transmission line tower |
| CN112838681B (en) * | 2021-02-03 | 2023-12-22 | 昆明理工大学 | Induction electricity taking device on high-voltage transmission line tower |
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Open date: 20090520 |