CN2087787U - New type position indicator of electric transmission line fault point - Google Patents
New type position indicator of electric transmission line fault point Download PDFInfo
- Publication number
- CN2087787U CN2087787U CN 90226273 CN90226273U CN2087787U CN 2087787 U CN2087787 U CN 2087787U CN 90226273 CN90226273 CN 90226273 CN 90226273 U CN90226273 U CN 90226273U CN 2087787 U CN2087787 U CN 2087787U
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- CN
- China
- Prior art keywords
- transmission line
- electric transmission
- fault point
- power transmission
- head end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a novel position indicator of an electric transmission line fault point, which provides an instrument which can accurately search for the position of the short circuit fault point of the electric transmission line (the power cable or the communication cable). The novel position indicator of an electric transmission line fault point makes use of the reflection characteristic of the high voltage current pulse wave on the fault electric transmission line to send the current pulse wave whose duration time is long out at the head end of the electric transmission line, and the current pulse wave is transmitted along the electric transmission line. A current pulse wave is reflected to the head end of the electric transmission line after the current pulse wave reaches a fault point. A position indicator arranged on the head end of the electric transmission line records the moment of sending the current pulse wave out from the electric transmission line and the moment of the current pulse waves reflected from the fault point to reach the head end of the electric transmission line, calculates the time difference and the distance between the fault point and the head end of the electric transmission line, and displays the kilometers. The novel position indicator of an electric transmission line fault point has exact and quick searching for the fault point of the electric transmission line, visual reading and convenient operation.
Description
The utility model is the field that belongs to the power test instrument, particularly relates to the instrument of power transmission line (power cable) short trouble point location, also relates to the instrument of communication cable localization of fault.
Localization method minute two classes of the present transmission line fault point that adopts both at home and abroad, one class methods are impedance methods, and its principle is to utilize to calculate short circuit trouble point is determined short circuit trouble point to the size of the impedance (or short-circuit current) between the power transmission line head end (end of transformer station) position.Make various instruments according to the impedance method principle.Utilize the patent existing ten multinomial (can be with reference to " locating device of overhead transmission line trouble spot " books of works such as B, A, Bao Luhrmann, E Wenben published in 1980 years) of the instrument of this principle manufacturing in the Soviet Union.The shortcoming of impedance method and corresponding instrument is that the impedance ground of trouble spot changes, and the starting condition of the transient state process of power transmission line may change when breaking down, so the error of definite power transmission line short circuit trouble point position is very big in this way.
Another kind of method is a traveling wave method, and its principle is to utilize the principle of reflection of power transmission line upward traveling wave, has made corresponding instrument according to row wave reflection principle.Send the potential pulse ripple at fault power transmission line head end to the trouble spot, behind the arrival trouble spot, the reflection of potential pulse wave direction power transmission line head end arrives the power transmission line head end.The instrument that utilizes the traveling wave method principle to make is installed in the power transmission line head end, the moment of the moment of sending the potential pulse ripple from power transmission line and reflected voltage pulsating wave arrival power transmission line head end is noted, calculate the distance that its mistiming and potential pulse ripple are propagated, and the position of the localization of faults demonstrates the distance (milimeter number) of trouble spot from the power transmission line head end with digital form.Japan produced this class orientator (can with reference to NEC academy compile " electrical equipment malfunction detects the Chinese translation of handbook one book, and publish in June, 1984).Because this class orientator is to utilize very short low voltage pulse ripple of duration, this duration can not reflect back into the power transmission line head end after very short potential pulse ripple arrives the trouble spot, the orientator that is installed in the power transmission line head end can only write down the moment of the potential pulse ripple that sends from the power transmission line head end, the potential pulse ripple that does not reflect from the trouble spot, the position of the therefore impossible localization of faults.
The purpose of the present utility model is the requirement according to Ministry of Energy, succeed in developing the novel orientator of transmission line fault point as early as possible, so that the position of the localization of faults more exactly in a short period of time, shorten the repair time, satisfy the needs of industrial and agricultural production and people's lives, reduce loss economically.
The technical scheme of the novel orientator of failure point of power transmission line:
The utility model has been corrected the incorrect notion of traveling wave method orientator of present employing, adopts the novel orientator of failure point of power transmission line of the high voltage pulse wave reflection principle manufacturing of longer duration.
After this orientator connects the 220V power supply, regulate autotransformer (T
1) output voltage, step-up transformer (T
2) secondary side voltage, make high-voltage capacitor (C
1) charging.(C
1) be charged to required voltage (operating voltage according to power transmission line is just selected) after, the high-voltage switch gear that closes (K) sends a current impulse ripple to power transmission line.This current impulse ripple is by resistance (R
2) produce potential pulse ripple signal, start record display device (P), the moment that record sends the current impulse ripple.To the reflection of transmission line of electricity head end, arrive the power transmission line head end and promptly arrive resistance (R behind the trouble spot of current impulse ripple arrival faulty line (L)
2) the moment, demonstrate the milimeter number of trouble spot through inner calculating automatically from power transmission line head end distance.
Advantage of the present utility model is: (1) utilizes the current impulse wave reflection principle of longer duration, and rationale is correct, and the positional accuracy height is easy to use; (2) with the peak value height of the simultaneous potential pulse ripple of current impulse ripple, can find the trouble spot that to find with action of low-voltage pulse; (3) directly the milimeter number of trouble spot from the power transmission line head end shown with record, calculating and the display device of robot calculator (single-chip microcomputer) for the basis.
Accompanying drawing: figure one, transmission line fault put novel orientator block scheme
(1) current pulser (2) potential pulse change-over circuit
(3) differentiating circuit (P) record, calculating automatic display unit
(K) high-voltage switch (L) fault power transmission line
Figure two, and transmission line fault is put novel orientator elementary diagram
(T
1) variac (T
2) step-up transformer (D) high voltage silicon rectifier stack
(R
1) current-limiting resistance (R
2), (R
3) resistance (R
4) potentiometer
(C
1), (C
2) capacitor (P) record calculating automatic display unit
(K) high-voltage switch gear (L) fault power transmission line
Specific embodiment: (T
1) 220V/240V, the 200VA variac; (T
2) use 220V/15KV, the step-up transformer of 500VA; (D) with inverse peak voltage be the high voltage silicon rectifier stack of 30KV; (C
1) with 0.5 μ F, the high-voltage capacitor of 15KV; R
2Use 0.5 Ω, the resistance of 2W.
The element characteristic of orientator is to decide according to the operating voltage of power transmission line and length, can make the serial orientator of different electric pressures in view of the above.
Claims (5)
1, the utility model is the novel orientator that is used for transmission line of electricity (power cable or communication cable) trouble spot.It is made up of current pulser (1), potential pulse change-over circuit (2), differentiating circuit (3) and automatic record display device (P), current pulser (1) low pressure end is connected on the 220V power supply, the other end connects high-voltage switch gear (K), faulty line (L) is connected with high-voltage switch gear (K), it is characterized in that: described current pulser (1) is by capacitor (C
1) current impulse that produces longer duration; Record display device (P) is started by potential pulse change-over circuit (2).
2, the novel orientator of failure point of power transmission line according to claim 1, it is characterized in that: current pulser (1) is by variac (T
1), step-up transformer (T
2), high voltage silicon rectifier stack (D), current-limiting resistance (R
1) and high-voltage capacitor (C
1) form, high-voltage switch (K) is connected to power transmission line with faulty line (L) and sends the current impulse ripple.
3, the novel orientator of failure point of power transmission line as claimed in claim 1 or 2 is characterized in that: capacitor (C
1) be the capacitor of high voltage large capcity.
4, transmission line fault is put novel orientator as claimed in claim 1 or 2, it is characterized in that: potential pulse change-over circuit (2) is by resistance (R
2) and potentiometer (R
3) form resistance (R
2) generation potential pulse activated display device (P).
5, transmission line fault is put novel orientator as claimed in claim 1 or 2, it is characterized in that: the distance of power transmission line head end and failure point of power transmission line (milimeter number) is shown automatically by record display device (P).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90226273 CN2087787U (en) | 1990-12-15 | 1990-12-15 | New type position indicator of electric transmission line fault point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90226273 CN2087787U (en) | 1990-12-15 | 1990-12-15 | New type position indicator of electric transmission line fault point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2087787U true CN2087787U (en) | 1991-10-30 |
Family
ID=4903556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90226273 Withdrawn CN2087787U (en) | 1990-12-15 | 1990-12-15 | New type position indicator of electric transmission line fault point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2087787U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331549A (en) * | 2010-05-25 | 2012-01-25 | 韦特柯格雷控制系统有限公司 | Electrical fault location determination |
| CN103439636A (en) * | 2012-10-31 | 2013-12-11 | 陕西海泰电子有限责任公司 | Cable open-circuit point position detecting method |
| CN103500493A (en) * | 2013-10-15 | 2014-01-08 | 广东建筑消防设施检测中心有限公司 | Energy-saving detecting device of creepage fire detector |
-
1990
- 1990-12-15 CN CN 90226273 patent/CN2087787U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331549A (en) * | 2010-05-25 | 2012-01-25 | 韦特柯格雷控制系统有限公司 | Electrical fault location determination |
| CN102331549B (en) * | 2010-05-25 | 2016-06-01 | 通用电气石油和天然气英国有限公司 | Electrical fault location is determined |
| CN103439636A (en) * | 2012-10-31 | 2013-12-11 | 陕西海泰电子有限责任公司 | Cable open-circuit point position detecting method |
| CN103500493A (en) * | 2013-10-15 | 2014-01-08 | 广东建筑消防设施检测中心有限公司 | Energy-saving detecting device of creepage fire detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |