CN203786249U - Distribution-network fault distance measuring device based on fault transient traveling-wave acquisition - Google Patents
Distribution-network fault distance measuring device based on fault transient traveling-wave acquisition Download PDFInfo
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- CN203786249U CN203786249U CN201420113114.2U CN201420113114U CN203786249U CN 203786249 U CN203786249 U CN 203786249U CN 201420113114 U CN201420113114 U CN 201420113114U CN 203786249 U CN203786249 U CN 203786249U
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Abstract
The utility model discloses a distribution-network fault distance measuring device based on fault transient traveling-wave acquisition. The distance measuring device comprises a signal conditioning plate, a high-speed signal acquiring plate and a monitoring plate, wherein the output end of the signal conditioning plate is electrically connected with the input end of the high-speed signal acquiring plate, and the high-speed signal acquiring plate is bidirectionally communicated and connected with the monitoring plate. Thus, the steps of distance measurement are reduced, the difficulties in distance measurement are reduced, and interference is resisted.
Description
Technical field
The utility model relates to a kind of Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave, particularly, relates to the earth fault Distance Judgment of 35KV and following distribution line.
Background technology
At present, the earth fault Distance Judgment of distribution line mainly contains following methods,
The voltage and current amount that records when wherein impedance method is with fault is calculated the impedance of fault loop, because the size of impedance and the length of circuit are directly proportional, so can obtain fault distance.The method is easily subject to the impact of the factors such as transition resistance, line distribution capacitance, transient state component, and for the more distribution line of joint line or branch, cannot get rid of pseudo-fault point, is only suitable in circuit simple in structure.
Travelling wave ranging method is the existing transformer station being more than 110KV in electric system, adopts the existing apparatus of this algorithm all can only solve branchiess transmission line of electricity, therefore in 35KV and following distribution, also cannot apply.
Signal injection method adopts the current signal that injects certain frequency by bus to faulty line, follows the tracks of the path of finding Injection Signal, and carry out route selection and location at faulty line.In the time that stake resistance is larger, the distributed capacitance of circuit can be shunted Injection Signal, and fault localization is interfered.
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave, simplifies range finding step to realize, and reduces range finding difficulty and jamproof advantage.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave, comprise signal regulating panel, high-speed signal acquisition plate and monitor board, the input end electrical connection of the output terminal of described signal regulating panel and high-speed signal acquisition plate, two-way communication is connected described high-speed signal acquisition plate with monitor board.
According to preferred embodiment of the present utility model, described signal regulating panel comprises wave filter, curtage sensor and operational amplifier, the output terminal of described wave filter is electrically connected with the input end of curtage sensor, and the output terminal of described curtage sensor is electrically connected with the input end of operational amplifier.
According to preferred embodiment of the present utility model, described high-speed signal acquisition plate comprises high-speed a/d acquisition chip and programmable array FPGA, the input end of described high-speed a/d acquisition chip is electrically connected with the output terminal of operational amplifier, and the output terminal of described high-speed a/d acquisition chip is electrically connected with the input end of programmable array FPGA.
According to preferred embodiment of the present utility model, described monitor board comprises microcontroller, deposits all devices, communication interface circuit and LCD module, described microcontroller and programmable array FPGA two-way communication, described in deposit all devices, communication interface circuit and LCD module and be all electrically connected with microcontroller.
According to preferred embodiment of the present utility model, described microcontroller adopts 32 8-digit microcontrollers.
According to preferred embodiment of the present utility model, described communication interface circuit at least comprises RS232/RS485 interface, CAN bus interface and Ethernet interface.
The technical solution of the utility model has following beneficial effect:
The technical solution of the utility model, utilize the distance-finding method of the electric characteristic of fault-signal transient state component, because the method is subject to that mutual inductor is saturated, the impact of fault initial phase angle, fault resstance and system operation mode is less, only need detection wire finishing die and zero mould wave head to arrive first the mistiming of measuring junction, simplify range finding step thereby reached, reduce range finding difficulty and jamproof object.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the theory diagram of the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave described in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave, comprise signal regulating panel, high-speed signal acquisition plate and monitor board, the input end electrical connection of the output terminal of signal regulating panel and high-speed signal acquisition plate, two-way communication is connected high-speed signal acquisition plate with monitor board.
Wherein, signal regulating panel, gathers earth fault travelling wave signal; High-speed signal acquisition plate, receives the earth fault travelling wave signal after signal regulating panel conditioning; Monitor board, processes man-machine interface and communication.
Signal regulating panel comprises wave filter, curtage sensor and operational amplifier, and the output terminal of described wave filter is electrically connected with the input end of curtage sensor, and the output terminal of curtage sensor is electrically connected with the input end of operational amplifier.
High-speed signal acquisition plate comprises high-speed a/d acquisition chip and programmable array FPGA, and the input end of high-speed a/d acquisition chip is electrically connected with the output terminal of operational amplifier, and the output terminal of high-speed a/d acquisition chip is electrically connected with the input end of programmable array FPGA.
Monitor board comprises microcontroller, deposits all devices, communication interface circuit and LCD module, and microcontroller and programmable array FPGA two-way communication, deposit all devices, communication interface circuit and LCD module and be all electrically connected with microcontroller.
Microcontroller adopts 32 8-digit microcontrollers.
Communication interface circuit at least comprises RS232/RS485 interface, CAN bus interface and Ethernet interface.
The utility model embodiment is as follows:
Distribution earth fault distance measurement device comprises the signal regulating panel that gathers earth fault travelling wave signal; Gather the high-speed signal acquisition plate of earth fault row ripple; Process the monitor board of man-machine interface and communication function.
Signal regulating panel is made up of wave filter, electric current (voltage) sensor, operational amplifier, and wave filter, by the power frequency component of the electric current of transmission line of electricity (voltage) and harmonic component filtering, retains the travelling wave signal producing because of fault ground; Electric current (voltage) sensor is isolated travelling wave signal, thereby eliminates the direct-coupling of secondary circuit and equipment weak electric signal; Electric current (voltage signal) after isolation is again in operational amplifier is adjusted to the receivable scope of high-speed a/d acquisition chip.
High-speed signal acquisition plate is made up of high-speed a/d device, field programmable gate array FPGA etc.High-speed a/d acquisition chip gathers electric current (voltage) travelling wave signal under the control of programmable array FPGA, and is deposited in the high-speed RAM buffer memory of programmable array FPGA.
The monitor board of man-machine interface and communication function mainly by 32 8-digit microcontrollers, deposit all devices, communication interface, LCD module etc. and form.After earth fault occurs, microcontroller takes out the travelling wave signal that signal acquiring board obtains from the high-speed RAM buffer memory of FPGA.Communication interface circuit is mainly made up of RS232/RS485 interface, CAN bus interface, Ethernet interface, for the row waveform of earth fault distance and earth fault generation is transferred to remote computation crane monitoring system; LCD module is mainly for human-machine operation provides display interface, the position of the point of topological structure, transmission line of electricity generation earth fault that simultaneously LCD module also can show power line networks in network topology.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave, it is characterized in that, comprise signal regulating panel, high-speed signal acquisition plate and monitor board, the input end electrical connection of the output terminal of described signal regulating panel and high-speed signal acquisition plate, two-way communication is connected described high-speed signal acquisition plate with monitor board.
2. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave according to claim 1, it is characterized in that, described signal regulating panel comprises wave filter, curtage sensor and operational amplifier, the output terminal of described wave filter is electrically connected with the input end of curtage sensor, and the output terminal of described curtage sensor is electrically connected with the input end of operational amplifier.
3. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave according to claim 2, it is characterized in that, described high-speed signal acquisition plate comprises high-speed a/d acquisition chip and programmable array FPGA, the input end of described high-speed a/d acquisition chip is electrically connected with the output terminal of operational amplifier, and the output terminal of described high-speed a/d acquisition chip is electrically connected with the input end of programmable array FPGA.
4. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave according to claim 3, it is characterized in that, described monitor board comprises microcontroller, deposits all devices, communication interface circuit and LCD module, described microcontroller and programmable array FPGA two-way communication, described in deposit all devices, communication interface circuit and LCD module and be all electrically connected with microcontroller.
5. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave according to claim 4, is characterized in that, described microcontroller adopts 32 8-digit microcontrollers.
6. the Distribution Network Failure distance measuring equipment gathering based on fault transient travelling wave according to claim 5, is characterized in that, described communication interface circuit at least comprises RS232/RS485 interface, CAN bus interface and Ethernet interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113114.2U CN203786249U (en) | 2014-03-13 | 2014-03-13 | Distribution-network fault distance measuring device based on fault transient traveling-wave acquisition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420113114.2U CN203786249U (en) | 2014-03-13 | 2014-03-13 | Distribution-network fault distance measuring device based on fault transient traveling-wave acquisition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823159A (en) * | 2014-03-13 | 2014-05-28 | 国家电网公司 | Distribution network fault distance measuring device based on fault transient state travelling wave collection and distance measuring method |
| CN106054022A (en) * | 2016-06-27 | 2016-10-26 | 柳州电器科学研究所有限公司 | Fault range finding device |
-
2014
- 2014-03-13 CN CN201420113114.2U patent/CN203786249U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823159A (en) * | 2014-03-13 | 2014-05-28 | 国家电网公司 | Distribution network fault distance measuring device based on fault transient state travelling wave collection and distance measuring method |
| CN106054022A (en) * | 2016-06-27 | 2016-10-26 | 柳州电器科学研究所有限公司 | Fault range finding device |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20140820 |