CN203224561U - Online monitoring device for transient overvoltage of power distribution network - Google Patents
Online monitoring device for transient overvoltage of power distribution network Download PDFInfo
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- CN203224561U CN203224561U CN 201320291428 CN201320291428U CN203224561U CN 203224561 U CN203224561 U CN 203224561U CN 201320291428 CN201320291428 CN 201320291428 CN 201320291428 U CN201320291428 U CN 201320291428U CN 203224561 U CN203224561 U CN 203224561U
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Abstract
An online monitoring device for transient overvoltage of a power distribution network comprises a high-voltage capacitance voltage divider, a secondary resistance capacitance divider, a high-speed data collecting card and a control computer. The high-voltage capacitance voltage divider is connected to a bus and connected with the secondary resistance capacitance divider through a first coaxial cable, the secondary resistance capacitance divider is connected with a high-speed data collecting card through a second coaxial cable, the high-speed data collecting card is connected with the control computer, and the high-voltage capacitance voltage divider, the secondary resistance capacitance divider, the high-speed data collecting card and the control computer are respectively connected with the ground. The highest sampling rate of the online monitoring device can reach to 7.5MS/s in each channel. The online monitoring device can trace and record various kinds of overvoltage of the power distribution network and voltage sag wave shapes of the power distribution network, has various analyzing functions and various wave shape processing functions and is small in power loss and convenient to maintain.
Description
Technical field
The utility model relates to a kind of power distribution network transient overvoltage on-Line Monitor Device based on the PCI-1714UL high-speed data acquisition card, belongs to electric system on-line monitoring field.
Background technology
At present, all kinds of voltage accident rates are higher in the 10kV electric system, comprise internal overvoltage and lightning surge.And the effect that various superpotential duration, amplitude, waveform, generation reason reach insulation also has nothing in common with each other.Although a large amount of overvoltage protections such as lightning arrester have been installed in practice; but when the superpotential accident appears in system; owing to there is not monitoring device; be difficult to determine that the reason of accident is because superpotential amplitude or steepness surpass the holding capacity of equipment; still the reduction of the dielectric level of equipment or protective device have problem; also be difficult to determine the fault that caused by Past Voltage within Power System, still because the damage that exterior overvoltage causes.On-line monitoring technique is development in recent years emerging technology very rapidly, in electric system, is used widely, but the present domestic and international all kinds of voltage on-Line Monitor Device function singlenesses of developing, sampling rate is lower.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned existing monitoring device, provide the electric system that a kind of function is more complete, sampling rate is higher on-Line Monitor Device, for detection of, record with analyze the fault that all kinds of superpotential of electric system, voltage dip and harmonic wave cause.
The utility model realizes that the technical scheme that above-mentioned purpose is taked is: a kind of power distribution network transient overvoltage on-Line Monitor Device, comprise high-voltage capacitive divider, secondary RC divider, high-speed data acquisition card and control computing machine, one end of high-voltage capacitive divider is connected on the bus, and the other end is connected with an end of secondary RC divider by first concentric cable; The other end of secondary RC divider is connected with an end of high-speed data acquisition card by second concentric cable, and the other end of high-speed data acquisition card is connected with the control computing machine; High-voltage capacitive divider, secondary RC divider, high-speed data acquisition card and control computing machine are connected with earthed system respectively.
The beneficial effect that the utility model can obtain is:
(1) high-voltage capacitive divider directly is connected hanging net operation on the bus, bus is powered on compress into row dividing potential drop for the first time, by concentric cable the low-voltage arm signal is transferred to the secondary RC divider.Still than higher, adopt the secondary RC divider that its signal is carried out second divided voltage from the signal amplitude of high-voltage capacitive divider output, by cable the voltage signal of low-pressure side is sent into high-speed data acquisition card then.The utility model is hanging net operation for a long time, and power attenuation is little, and is easy to maintenance.
(2) the control computing machine can all kinds of superpotential of online tracing record electrical network and voltage dip waveform, and has various analyses and waveform processing function, can provide scientific basis for security of system, reliability service.
(3) sampling rate of PCI-1714UL high-speed data acquisition card can reach every passage 7.5MS/s.
Description of drawings
Fig. 1 is the structural representation of power distribution network transient overvoltage on-Line Monitor Device described in the utility model.
Fig. 2 is the fundamental diagram of power distribution network transient overvoltage on-Line Monitor Device described in the utility model.
Reference numeral is: 1, primary voltage signal, 2, high-voltage capacitive divider, 3, the secondary RC divider, 4, the PCI-1714UL high-speed data acquisition card, 5, the control computing machine, 6, the 10kV bus, 7, earthed system.
Embodiment
As shown in Figure 1, a kind of power distribution network transient overvoltage on-Line Monitor Device comprises high-voltage capacitive divider 2, secondary RC divider 3, PCI-1714UL high-speed data acquisition card 4 and control computing machine 5, and high-voltage capacitive divider 2 adopts the silicon rubber oversheath, compact conformation is pure electric capacity original paper.One end of high-voltage capacitive divider 2 is connected hanging net operation on the 10kV bus 6, and the other end is connected with an end of secondary RC divider 3 by first concentric cable; The other end of secondary RC divider 3 is connected with an end of PCI-1714UL high-speed data acquisition card 4 by second concentric cable, and the other end of PCI-1714UL high-speed data acquisition card 4 is connected with control computing machine 5; High-voltage capacitive divider 2, secondary RC divider 3, high-speed data acquisition card 4 and control computing machine 5 all are connected with earthed system 7 by reliable annealed copper wire.
As shown in Figure 2, primary voltage signal 1 through high-voltage capacitive divider 2 and secondary RC divider 4 twice dividing potential drop after, voltage drops to the scope that PCI-1714UL high-speed data acquisition card 5 can be gathered.In the dividing potential drop process, adopt high-voltage capacitive divider 2 and secondary RC divider 4 can keep waveform and steepness constant, only reduce amplitude.Data are carried out the A/D conversion after entering PCI-1714UL high-speed data acquisition card 5, judged, store and analyzed by control computing machine 6 again.
Claims (1)
1. power distribution network transient overvoltage on-Line Monitor Device, it is characterized in that, comprise high-voltage capacitive divider, secondary RC divider, high-speed data acquisition card and control computing machine, one end of high-voltage capacitive divider is connected on the bus, and the other end is connected with an end of secondary RC divider by first concentric cable; The other end of secondary RC divider is connected with an end of high-speed data acquisition card by second concentric cable, and the other end of high-speed data acquisition card is connected with the control computing machine; High-voltage capacitive divider, secondary RC divider, high-speed data acquisition card and control computing machine are connected with earthed system respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320291428 CN203224561U (en) | 2013-05-24 | 2013-05-24 | Online monitoring device for transient overvoltage of power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320291428 CN203224561U (en) | 2013-05-24 | 2013-05-24 | Online monitoring device for transient overvoltage of power distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224561U true CN203224561U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320291428 Expired - Lifetime CN203224561U (en) | 2013-05-24 | 2013-05-24 | Online monitoring device for transient overvoltage of power distribution network |
Country Status (1)
| Country | Link |
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| CN (1) | CN203224561U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182056A (en) * | 2015-09-08 | 2015-12-23 | 凯里供电局 | Lightning overvoltage online monitoring system |
| CN106771521A (en) * | 2016-12-15 | 2017-05-31 | 重庆大学 | A kind of substation equipment overvoltage aggregation of data acquisition system and method |
| CN110687344A (en) * | 2019-10-24 | 2020-01-14 | 南京南瑞继保电气有限公司 | Single-phase voltage sag detection method and device, voltage restorer, equipment and medium |
-
2013
- 2013-05-24 CN CN 201320291428 patent/CN203224561U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182056A (en) * | 2015-09-08 | 2015-12-23 | 凯里供电局 | Lightning overvoltage online monitoring system |
| CN106771521A (en) * | 2016-12-15 | 2017-05-31 | 重庆大学 | A kind of substation equipment overvoltage aggregation of data acquisition system and method |
| CN110687344A (en) * | 2019-10-24 | 2020-01-14 | 南京南瑞继保电气有限公司 | Single-phase voltage sag detection method and device, voltage restorer, equipment and medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |