CN103744000A - Voltage traveling wave collection device - Google Patents
Voltage traveling wave collection device Download PDFInfo
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- CN103744000A CN103744000A CN201310744937.5A CN201310744937A CN103744000A CN 103744000 A CN103744000 A CN 103744000A CN 201310744937 A CN201310744937 A CN 201310744937A CN 103744000 A CN103744000 A CN 103744000A
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Abstract
The invention discloses a voltage traveling wave collection device which comprises a mutual inductor bushing end-shield capacitor C1, a first inductor L1, a second inductor L2, a capacitor C2, an isolation transformer T, a first resistor R1, a second resistor R2 and a discharge gap F, wherein the end-shield capacitor C1, the first inductor L1, the first resistor R1 and the second inductor L2 are connected in series with one another in sequence, and the tail end of the series circuit is grounded; the capacitor C2 and the second resistor R2 are connected in parallel with two ends of the second inductor L2; one end of the discharge gap F is connected between the end-shield capacitor C1 and the first inductor L1, and the other end of the discharge gap F is grounded; one end of a primary side coil of the isolation transformer T is connected between the first resistor R1 and the second inductor L2, and the other end of the primary side coil of the isolation transformer T is grounded; a secondary side coil of the isolation transformer T outputs a high-frequency voltage traveling wave. The voltage traveling wave collection device disclosed by the invention realizes accurate transmission of the high-frequency voltage traveling wave and is used for accurately positioning a fault of a power grid and measuring a distance.
Description
Technical field
The present invention relates to a kind of voltage traveling wave harvester, belong to electrical equipment technical field.
Background technology
After high-voltage fence breaks down, accurately promptly find trouble spot to timely reparation circuit, fast recovery of power supply is significant.In recent years, Travelling Wave Fault Location and ranging technology develop rapidly, application number is that the patent documentation of 99123488.X discloses a kind of fault locating system, utilize " GPS " (Global Positioning System (GPS)) clock to time, main website and the capable ripple of substation reception false voltage are installed at circuit two ends, in main website and substation circuit two ends, are calculated elder generation's localization of faults afterwards that the capable ripple of false voltage arrives.
Effective extraction of travelling wave signal is the prerequisite of high-voltage fence traveling-wave protection and Travelling Wave Fault Location, and whether correctly can travelling wave signal effectively extract the mutual inductor progress of disease high frequency transient amount that depends on.Research shows, current transformer can the progress of disease up to the current traveling wave signal of 100kHz, but be a difficult problem for the progress of disease of HF voltage row ripple, at present, on high-voltage fence, widely used capacitance type potential transformer (CVT) is because cutoff frequency is too low, row ripple progress of disease characteristic is not good, and the application of voltage traveling wave location and telemetry is extremely restricted.And the technical scheme about HF voltage row ripple progress of disease device is not disclosed in the patent documentation that application number is 99123488.X.
Summary of the invention
The object of the present invention is to provide a kind of voltage traveling wave harvester, realize the correct progress of disease to HF voltage row ripple.
Object of the present invention is achieved by the following technical programs:
A kind of voltage traveling wave harvester, comprise mutual inductor bottom shielding of bushing capacitor C 1, the first inductance L 1, the second inductance L 2, capacitor C 2, isolating transformer T, the first resistance R 1, the second resistance R 2, discharging gap F, the capacitance of described capacitor C 2 equals the capacitance of bottom shielding of bushing capacitor C 1, the inductance value of described the second inductance L 2 equals the inductance value of the first inductance L 1, described bottom shielding of bushing capacitor C 1, the first inductance L 1, the first resistance R 1, the second inductance L 2 is connected successively, series circuit end ground connection, described capacitor C 2, the second resistance R 2 is parallel to respectively the second inductance L 2 two ends, an end of described discharging gap F is connected between bottom shielding of bushing capacitor C 1 and the first inductance L 1, the other end ground connection of discharging gap F, one end of the first siding ring of described isolating transformer T is connected to the first resistance R 1, between the second inductance L 2, the other end ground connection of the first siding ring of isolating transformer T, the capable ripple of second siding ring output high voltage of described isolating transformer T.
Compared with prior art, the invention has the beneficial effects as follows: the present invention obtains primary side voltage traveling wave signal indirectly to the measurement of earth current signal on mutual inductor end shield ground wire, realize the correct progress of disease of the capable ripple of false voltage, to Travelling Wave Fault Location and find range significant.
Accompanying drawing explanation
Fig. 1 is voltage traveling wave harvester circuit diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
In high-voltage fence, voltage transformer (VT) or current transformer all adopt capacitance type structure, between system primary side and mutual inductor end shield, have stray capacitance, the transient current signal that enters ground on mutual inductor end shield ground wire can reflect transient voltage signal, and both have following relation:
wherein C represents bottom shielding of bushing capacitance, and i represents to enter on end shield ground wire the current value on ground, and u is system primary side magnitude of voltage, to the measurement of the electric current that enters ground, can indirectly obtain primary side voltage traveling wave signal.As shown in Figure 1, the voltage traveling wave harvester of the present invention's design comprises mutual inductor bottom shielding of bushing capacitor C 1, the first inductance L 1, the second inductance L 2, capacitor C 2, isolating transformer T, the first resistance R 1, the second resistance R 2, discharging gap F, the capacitance of described capacitor C 2 equals the capacitance of bottom shielding of bushing capacitor C 1, the inductance value of described the second inductance L 2 equals the inductance value of the first inductance L 1, described bottom shielding of bushing capacitor C 1, the first inductance L 1, the first resistance R 1, the second inductance L 2 is connected successively, series circuit end ground connection, described capacitor C 2, the second resistance R 2 is parallel to respectively the second inductance L 2 two ends, an end of described discharging gap F is connected between bottom shielding of bushing capacitor C 1 and the first inductance L 1, the other end ground connection of discharging gap F, one end of the first siding ring of described isolating transformer T is connected to the first resistance R 1, between the second inductance L 2, the other end ground connection of the first siding ring of isolating transformer T, the capable ripple of second siding ring output high voltage of described isolating transformer T.Described bottom shielding of bushing capacitor C 1, the first inductance L 1 form series-tuned circuit, and described capacitor C 2, the second inductance L 2 form parallel-tuned circuit, and described discharging gap F plays overvoltage protection effect.
Voltage traveling wave harvester of the present invention is Low ESR for power frequency component, and for high-frequency signal, this circuit is high impedance, and therefore, parallel-tuned circuit is the power frequency component in filtered signal effectively, and reserved high-frequency component, realizes the correct progress of disease to HF voltage row ripple.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (1)
1. a voltage traveling wave harvester, it is characterized in that, comprise mutual inductor bottom shielding of bushing capacitor C 1, the first inductance L 1, the second inductance L 2, capacitor C 2, isolating transformer T, the first resistance R 1, the second resistance R 2, discharging gap F, the capacitance of described capacitor C 2 equals the capacitance of bottom shielding of bushing capacitor C 1, the inductance value of described the second inductance L 2 equals the inductance value of the first inductance L 1, described bottom shielding of bushing capacitor C 1, the first inductance L 1, the first resistance R 1, the second inductance L 2 is connected successively, series circuit end ground connection, described capacitor C 2, the second resistance R 2 is parallel to respectively the second inductance L 2 two ends, an end of described discharging gap F is connected between bottom shielding of bushing capacitor C 1 and the first inductance L 1, the other end ground connection of discharging gap F, one end of the first siding ring of described isolating transformer T is connected to the first resistance R 1, between the second inductance L 2, the other end ground connection of the first siding ring of isolating transformer T, the capable ripple of second siding ring output high voltage of described isolating transformer T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744937.5A CN103744000A (en) | 2013-12-30 | 2013-12-30 | Voltage traveling wave collection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744937.5A CN103744000A (en) | 2013-12-30 | 2013-12-30 | Voltage traveling wave collection device |
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| CN103744000A true CN103744000A (en) | 2014-04-23 |
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| CN201310744937.5A Pending CN103744000A (en) | 2013-12-30 | 2013-12-30 | Voltage traveling wave collection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896272A (en) * | 2017-02-07 | 2017-06-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Suppress the circuit and measuring method of line-frequency induction voltage when transmission line parameter is measured |
| CN107167663A (en) * | 2017-03-30 | 2017-09-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of measurement in a closed series circuit and measuring method for being used to suppress line-frequency induction voltage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152501A (en) * | 1998-11-12 | 2000-05-30 | Nippon Kouatsu Electric Co | Transmission and distribution line diagram information preparing system and failure point orienting system |
| CN102680860A (en) * | 2012-06-08 | 2012-09-19 | 东华理工大学 | Automatic fault-point locating method for traveling-wave based fault location of high-voltage electric power lines |
| CN102780212A (en) * | 2012-07-20 | 2012-11-14 | 清华大学 | Single-phase grounding traveling-wave protection device for distribution line |
| CN202975238U (en) * | 2012-09-13 | 2013-06-05 | 山西省电力公司大同供电分公司 | Fault transient travelling wave detection device for small-current grounding system |
| CN203673021U (en) * | 2013-12-30 | 2014-06-25 | 镇江市高等专科学校 | Voltage traveling wave acquisition apparatus |
-
2013
- 2013-12-30 CN CN201310744937.5A patent/CN103744000A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152501A (en) * | 1998-11-12 | 2000-05-30 | Nippon Kouatsu Electric Co | Transmission and distribution line diagram information preparing system and failure point orienting system |
| CN102680860A (en) * | 2012-06-08 | 2012-09-19 | 东华理工大学 | Automatic fault-point locating method for traveling-wave based fault location of high-voltage electric power lines |
| CN102780212A (en) * | 2012-07-20 | 2012-11-14 | 清华大学 | Single-phase grounding traveling-wave protection device for distribution line |
| CN202975238U (en) * | 2012-09-13 | 2013-06-05 | 山西省电力公司大同供电分公司 | Fault transient travelling wave detection device for small-current grounding system |
| CN203673021U (en) * | 2013-12-30 | 2014-06-25 | 镇江市高等专科学校 | Voltage traveling wave acquisition apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 邹贵彬等: "一种高压电网电压行波信号的提取方法", 《电力系统自动化》, vol. 33, no. 2, 25 January 2009 (2009-01-25) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896272A (en) * | 2017-02-07 | 2017-06-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Suppress the circuit and measuring method of line-frequency induction voltage when transmission line parameter is measured |
| CN107167663A (en) * | 2017-03-30 | 2017-09-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of measurement in a closed series circuit and measuring method for being used to suppress line-frequency induction voltage |
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Application publication date: 20140423 |