CN201892719U - On-line ranging device for cable faults of distribution network - Google Patents
On-line ranging device for cable faults of distribution network Download PDFInfo
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- CN201892719U CN201892719U CN2010206389877U CN201020638987U CN201892719U CN 201892719 U CN201892719 U CN 201892719U CN 2010206389877 U CN2010206389877 U CN 2010206389877U CN 201020638987 U CN201020638987 U CN 201020638987U CN 201892719 U CN201892719 U CN 201892719U
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Abstract
The utility model discloses an on-line ranging device for cable faults of a distribution network. The output/input terminal of a current sensor with a working band of 3MHz is connected with the output/input terminal of a signal detection circuit; the output/input terminal of the signal detection circuit is connected with an A/D conversion module with the frequency of 100MHz; the A/D conversion module with the frequency of 100MHz is connected with the output/input terminal of a signal HFBR (high flux beam reactor) series optical fiber transceiver; and the signal output/input terminal of the HFBR series optical fiber transceiver is connected with a buffer circuit which is connected with a host computer. The device can be used for analyzing and determining the fault distance by using a full-automatic transient signal, so that the test operation is simple and the on-line monitoring of a power supply cable is facilitated. The current sensor and an acquisition card have small volume and compact structure so as to facilitate the field arrangement.
Description
Technical field
The utility model relates to a kind of electrical network measurement mechanism, relates to a kind of device of measuring the power cable fault position under electric power thus supplied specifically.
Background technology
Along with developing rapidly of modern economy, adopt the cable power supply mode more and more.But because many, power cable line is in operation and often breaks down, because cable burial in underground, when breaking down, is difficult for promptly and accurately searching out the trouble spot.Be different from pole line, the failure mechanism of power cable and failure mode more complicated.General permanent fault is few, and aging gradually cyclic breakdown and the flashover failure ratio that strengthens of power cable insulation material is more.At present, extensively the Equipment for Cable Fault Location of utilizing all is under power-off condition, adds low, high-voltage pulse signal to failure cable earlier, then according to the signal testing trouble spot distance that reflects from the trouble spot.The fault location device volume of this offline mode is big, running operation is complicated, and reflection wave identification needs skilled staff just can finish.The present accurate device of testing power cable fault position under electric power thus supplied not also.Therefore seek a kind of fast, power cable fault distance measuring equipment and method accurately, to shorten the repair time, to reduce loss of outage, have a great deal of practical meanings.
Summary of the invention
At the defective that the online distance measuring equipment of existing power distribution network cable fault exists, it is a kind of under situation about not having a power failure that the utility model provides, distance measuring equipment that can the online fault of pinpoint power distribution network cable.
Solving the problems of the technologies described above the concrete technical measures of being taked is: the online distance measuring equipment of a kind of power distribution network cable fault, it is characterized in that: by current sensor, signal deteching circuit, data collecting card, fiber-optic signal transmitter and main frame constitute, working band is the I/O that the I/O of the current sensor of 3MHz connects signal deteching circuit, the I/O of signal deteching circuit connects the A/D conversion module of 100MHz, the A/D conversion module of 100MHz connects HFBR series fiber optics transceiver signal I/O, HFBR series fiber optics transceiver signal I/O connects buffer circuit, and buffer circuit connects host computer.
The beneficial effects of the utility model: this device is to utilize mixed electrical optical type current sensor, can conveniently collect the fault transient signal of power cable arbitrarily such as high-tension cable.Utilize the traveling wave method of fault transient signal, measure the fault distance of fault arbitrarily such as high resistance, low resistance, periodicity and flashover fault.Owing under electric power thus supplied, discern the cable initial failure and measure abort situation,, can significantly reduce the economic loss that produces because of having a power failure so can carry out cable maintenance and maintenance in advance.
This device is by full-automatic transient signal assay determination fault distance, so test operation is simple, helps the in-service monitoring of service cable.Current sensor and capture card volume are little, and compact conformation helps on-the-spot the layout.
Figure of description
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is a circuit connection diagram.
Embodiment
Be described with reference to the accompanying drawings structure of the present utility model.
The online distance measuring equipment of a kind of power distribution network cable fault as shown in Figure 1, is made of current sensor, signal deteching circuit, high-speed data acquisition, signal span line and main frame.
The circuit of each device connects as shown in Figure 2, and current sensor is made of Luo Si coil mode, can be operated in the high band that frequency is 3MHz.
The current sensor signal I/O connects signal deteching circuit, signal deteching circuit is not only carried out the work that is transferred to high-speed data acquisition card from current sensor signal, also discerns fault-signal sends work from the data acquisition enabling signal to data collecting card.(I/O of signal deteching circuit connects the A/D conversion module of 100MHz,) the A/D conversion module is data collecting card, it is AD9218BST-105 that the A/D conversion module of 100MHz is selected model for use, AD conversion module AD9218BST-105 is low power consumption (275mW), (105MSPS) at a high speed, signal to noise ratio (S/N ratio) is 57dB, and maximum inlet voltage is 1Vp-p, and AD conversion resolution is 10bit.Utilize it to become digital signal with the sample cycle of 10ns.EPM7512B has 512 logic units, and its operating rate is 5ns.
To data processing and synchronous generator is the CPLD EMP7512B of MAX7000 series.For system's control and transmission data, utilize MPU STC 12C5412AD-48I.For storage data utilizes the high-speed RAM PDM41256SA of storage speed for 7ns.The synchronizing signal that takes place at CPLD is, be input to AD transducer AD9218 to realize CPLD and the consistance of this two work period of AD transducer, send beginning to the AD transducer again, stop, the various control signals of the 3rd state transformation are also sent address signal to data register (RAM).
CPLD sends beginning to MPU on one side, stops, and read data, the transmission data begin control signal, finish Yi Bian receive transmission again from MPU, run through control signal.
The work of CPLD is mainly received control by the output signal of signal deteching circuit.
STC 12C5412AD is that to have maximum operation frequency be 48MHZ, and the instruction cycle is 1T, 512byte RAM, 8K byte Flash ROM, the monolithic processor of the STC series of 10bit AD conversion.The A/D conversion module of 100MHz connects HFBR series fiber optics transceiver signal I/O, and data transmission terminal is made up of current to light inversion, fiber optics and light-electric conversion. and current to light inversion utilizes electro-optical transforming device HFBR1414 to become light signal from the digital signal that capture card comes out.Fiber optics is carried out the function that the optical signal transmission that the electric light device is gone out arrives phototube, also ensures the electrical isolation between high pressure and the user.Light-to-current inversion is utilized HFBR-2412, the maximum transfer speed of HF series electric light, photoelectric device is 160MBD, transmission range is 500m, HFBR series fiber optics transceiver signal I/O connects buffer circuit, connects between the interface (USB or COM) of buffer circuit assurance computer and the light-to-current inversion.
As mentioned above, this device is just gathered storage with the fault-signal that is produced with high speed on service cable, then it is transferred to computer, and then computer is handled the data information differentiation fault-signal of input.
Claims (1)
1. online distance measuring equipment of power distribution network cable fault, it is characterized in that: by current sensor, signal deteching circuit, data collecting card, fiber-optic signal transmitter and main frame constitute, working band is the I/O that the I/O of the current sensor of 3MHz connects signal deteching circuit, the I/O of signal deteching circuit connects the A/D conversion module of 100MHz, the A/D conversion module of 100MHz connects HFBR series fiber optics transceiver signal I/O, HFBR series fiber optics transceiver signal I/O connects buffer circuit, and buffer circuit connects host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206389877U CN201892719U (en) | 2010-12-03 | 2010-12-03 | On-line ranging device for cable faults of distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206389877U CN201892719U (en) | 2010-12-03 | 2010-12-03 | On-line ranging device for cable faults of distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892719U true CN201892719U (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206389877U Expired - Fee Related CN201892719U (en) | 2010-12-03 | 2010-12-03 | On-line ranging device for cable faults of distribution network |
Country Status (1)
| Country | Link |
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| CN (1) | CN201892719U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004209A (en) * | 2010-12-03 | 2011-04-06 | 丹东欣泰电气股份有限公司 | Distribution network cable fault on-line distance measuring equipment and distance measuring method |
-
2010
- 2010-12-03 CN CN2010206389877U patent/CN201892719U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004209A (en) * | 2010-12-03 | 2011-04-06 | 丹东欣泰电气股份有限公司 | Distribution network cable fault on-line distance measuring equipment and distance measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20171203 |