CN201740844U - Fault transient signal imitation device for power transmission line - Google Patents
Fault transient signal imitation device for power transmission line Download PDFInfo
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- CN201740844U CN201740844U CN201020275120XU CN201020275120U CN201740844U CN 201740844 U CN201740844 U CN 201740844U CN 201020275120X U CN201020275120X U CN 201020275120XU CN 201020275120 U CN201020275120 U CN 201020275120U CN 201740844 U CN201740844 U CN 201740844U
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Abstract
The utility model discloses a fault transient signal imitation device for a power transmission line, which comprises a main controller circuit and a power supply circuit. An input end of the main controller circuit is connected with an upper computer for outputting fault data. An output end of the main controller circuit is connected with a CPLD device. The CPLD device receives a fault signal output by the main controller circuit, carries out real-time measurement on the frequency of the fault signal output by the main controller circuit and outputs the fault signal and a frequency measurement result. An output end of the CPLD device is connected with a frequency measurement result display circuit and a D/A conversion circuit. An output end of the D/A conversion circuit is connected with a signal amplification filter circuit. The signal amplification filter circuit receives a fault waveform of an analog quantity output by the D/A conversion circuit, carries out amplification and filtration on the fault waveform and outputs the fault waveform. The fault transient signal imitation device for the power transmission line has the advantages of simple structure, reasonable design, realization of high stability, high accuracy and high resolution output of the fault waveform, realization of real-time measurement and display of the frequency of the output fault signal, low cost and convenient popularization and use.
Description
Technical field
The utility model belongs to power transmission lines fault test technical field, especially relates to a kind of power transmission lines fault transient signal imitation device.
Background technology
When power circuit breaks down, will cause bigger potential safety hazard to electrical network, and the user power utilization quality will be affected.Influence in view of feeder line fault brings people's productive life and economic development produces reason, characteristics and wave form varies The Characteristic Study to feeder line fault and seems more and more important.On real power circuit, carry out the fault simulation test power equipment and personal safety are all had bigger harm.With the electronic technology is means, accurately simulates the transient signal of feeder line fault moment generation, and the detection that can be relay protection device performance and online fault location device distance accuracy provides true, stable signal source.The method cost is lower, and for different power circuit structures simulation is preferably arranged.The feeder line fault transient signal belongs to the higher unconventional waveform of frequency, traditional normal signal that can only produce can not be used to simulate electric power transmission line failure transient signal as the waveform generator of sine wave, square wave, pulsating wave etc., needs a kind of arbitrarily signal generating device of design reflect power transmission lines fault transient signal.
The implementation of existing arbitrarily signal generating device has multiple modes such as programmed control output, DMA output, the addressing of V-CLK counter and Direct Digital frequency synthesis.Though programmed control way of output circuit is simple, data output bad timing is true, can influence the frequency and the phase place of signal, and be subjected to the restriction of computer run speed, and output signal frequency is lower; DMA (Direct Memory Access) output intent can improve the output speed of data but existing problems are when output waveform, and microprocessor loses bus control right and can't carry out other operations and can't carry out the shortcoming that multi channel signals is exported; V-CLK counter addressing waveforms storage list is a kind of implementation method of traditional AWG (Arbitrary Waveform Generator), the address of its generation is continuous, output waveform quality height, but it is higher and need multistage frequency division or adopt high performance phaselocked loop to hardware requirement, wherein frequency division formula Frequency Of Signal Generator resolution is low, and phase-locking type Frequency Of Signal Generator switch speed is slow; The major advantage of direct digital frequency synthesis technology is to upgrade output signal as need to need not to change any circuit and hardware, the Wave data that only needs to rewrite in the storer gets final product, but but has the limited bandwidth system of output signal and the spuious bigger shortcoming of output signal.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of power transmission lines fault transient signal imitation device of ultimate principle and the power combining circuit fault-signal characteristics design according to direct digital frequency synthesis technology is provided, it is simple in structure, reasonable in design, can realize high stability, high precision, the output of high-resolution fault waveform, and can realize the real-time measurement and the demonstration of output fault-signal frequency, volume is little, cost is low, is convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of power transmission lines fault transient signal imitation device, it is characterized in that: comprise main controller circuit and give the power circuit of each power unit power supply, the host computer of the input termination output fault data of main controller circuit, the output termination CPLD device of main controller circuit, main controller circuit receives from the fault data of host computer and exports fault-signal and give the CPLD device, fault-signal and frequency measurement result are measured and exported to the CPLD device in real time to the frequency of main controller circuit output fault-signal, the output termination frequency measurement of CPLD device is display circuit and D/A change-over circuit as a result, frequency measurement display circuit as a result receives the frequency measurement result of CPLD device output and the frequency measurement result is shown in real time, the D/A change-over circuit receives the fault-signal of CPLD device output and the fault-signal of digital quantity is converted to the fault waveform output of analog quantity, the output termination signal amplification circuit filter of D/A change-over circuit, signal amplification circuit filter receive the output of D/A change-over circuit analog quantity fault waveform and amplify with filtering after export.
Be integrated with serial communication circuit in the described main controller circuit, main controller circuit is by the fault data of serial communication circuit reception from host computer.
Described main controller circuit is a single-chip microcomputer.
Described single-chip microcomputer is chip SCT89C58RD+.
Described CPLD device is chip MAX EPM7128SLC84-15.
Described frequency measurement display circuit as a result is the seven segment digital tubes display circuit.
The utility model compared with prior art has the following advantages:
1, the utility model has overcome unfavorable factors such as the cost height that carries out test tape on actual track, poor stability; can accurately simulate the transient signal of feeder line fault moment generation, the detection that can be relay protection device performance and online fault location device distance accuracy provides true, stable signal source.
2, the utility model has made full use of the interior resource of sheet of STC89C58RD+ single-chip microcomputer, adopted the output of the MAX7000S series CPLD device realization fault-signal of altera corp, bring great convenience to building logical circuit, circuit structure is simple, and is reasonable in design.
3, the STC89C58RD+ single-chip microcomputer of the utility model employing, the RAM of integrated 1280 bytes on the sheet, can communicate by letter with host computer by serial communication circuit, realize the real-time update of fault data, can also finish the early stage of fault data on the host computer and handle, help to expand range of application of the present utility model.
4, the utility model complete function and result of use are good, not only can be used to simulate electric power transmission line failure transient signal, realize high stability, high precision, the output of high-resolution fault waveform, the real-time measurement and the demonstration that can also realize exporting the fault data frequency.
5, the utility model volume is little, cost is low, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Description of reference numerals:
The 1-power circuit; The 2-host computer; The 3-main controller circuit;
The 4-CPLD device; The 5-frequency measurement is display circuit as a result; The 6-D/A change-over circuit;
The 7-signal amplification circuit filter.
Embodiment
As shown in Figure 1, the utility model comprises main controller circuit 3 and gives the power circuit 1 of each power unit power supply, the host computer 2 of the input termination output fault data of main controller circuit 3, the output termination CPLD device 4 of main controller circuit 3, main controller circuit 3 receives from the fault data of host computer 2 and exports fault-signal and give CPLD device 4, fault-signal and frequency measurement result are measured and exported to the frequency of 4 pairs of main controller circuits of CPLD device, 3 output fault-signals in real time, the output termination frequency measurement of CPLD device 4 is display circuit 5 and D/A change-over circuit 6 as a result, frequency measurement display circuit 5 as a result receives the frequency measurement result of CPLD device 4 outputs and the frequency measurement result is shown in real time, D/A change-over circuit 6 receives the fault-signal of CPLD device 4 outputs and the fault-signal of digital quantity is converted to the fault waveform output of analog quantity, the output termination signal amplification circuit filter 7 of D/A change-over circuit 6, signal amplification circuit filter 7 receive 6 outputs of D/A change-over circuits analog quantity fault waveform and amplify with filtering after export.
In the present embodiment, be integrated with serial communication circuit in the described main controller circuit 3, main controller circuit 3 is by the fault data of serial communication circuit reception from host computer 2.Described main controller circuit 3 is a single-chip microcomputer.Described single-chip microcomputer is chip SCT89C58RD+.Described CPLD device 4 is chip MAX EPM7128SLC84-15.Described frequency measurement display circuit 5 as a result is the seven segment digital tubes display circuit.
The course of work of the present utility model is: by Serial Port Line the utility model is connected to host computer 2, after system powers on, by STC89C58RD+ microcontroller serial port debugging acid, the power transmission lines fault data that will anticipate on host computer 2 downloads in the main controller circuit 3 on host computer 2; Main controller circuit 3 receives and is stored in the internal RAM from the fault data of host computer 2 and with it, in the pre-set time interval, export to CPLD device 4 successively, CPLD device 4 receive main controller circuits 3 outputs fault-signal, fault-signal and frequency measurement result are measured and exported to the frequency of main controller circuit 3 output fault-signals in real time; Frequency measurement display circuit 5 as a result receives the frequency measurement result of CPLD device 4 outputs and the frequency measurement result is shown in real time, D/A change-over circuit 6 receives the fault-signal of CPLD devices 4 outputs and the fault waveform that the fault-signal of digital quantity is converted to analog quantity is exported to signal amplification circuit filter 7, signal amplification circuit filter 7 receive 6 outputs of D/A change-over circuits analog quantity fault waveform and amplify with filtering after export.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (6)
1. power transmission lines fault transient signal imitation device, it is characterized in that: comprise main controller circuit (3) and give the power circuit (1) of each power unit power supply, the host computer (2) of the input termination output fault data of main controller circuit (3), the output termination CPLD device (4) of main controller circuit (3), main controller circuit (3) receives from the fault data of host computer (2) and exports fault-signal and give CPLD device (4), fault-signal and frequency measurement result are measured and exported to CPLD device (4) in real time to the frequency of main controller circuit (3) output fault-signal, the output termination frequency measurement of CPLD device (4) is display circuit (5) and D/A change-over circuit (6) as a result, frequency measurement display circuit (5) as a result receives the frequency measurement result of CPLD device (4) output and the frequency measurement result is shown in real time, D/A change-over circuit (6) receives the fault-signal of CPLD device (4) output and the fault-signal of digital quantity is converted to the fault waveform output of analog quantity, the output termination signal amplification circuit filter (7) of D/A change-over circuit (6), signal amplification circuit filter (7) receive D/A change-over circuit (6) output analog quantity fault waveform and amplify with filtering after export.
2. according to the described power transmission lines fault transient of claim 1 signal imitation device, it is characterized in that: described main controller circuit is integrated with serial communication circuit in (3), and main controller circuit (3) is by the fault data of serial communication circuit reception from host computer (2).
3. according to claim 1 or 2 described power transmission lines fault transient signal imitation devices, it is characterized in that: described main controller circuit (3) is a single-chip microcomputer.
4. according to the described power transmission lines fault transient of claim 3 signal imitation device, it is characterized in that: described single-chip microcomputer is chip SCT89C58RD+.
5. according to the described power transmission lines fault transient of claim 1 signal imitation device, it is characterized in that: described CPLD device (4) is chip MAX EPM7128SLC84-15.
6. according to the described power transmission lines fault transient of claim 1 signal imitation device, it is characterized in that: described frequency measurement display circuit (5) as a result is the seven segment digital tubes display circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275120XU CN201740844U (en) | 2010-07-26 | 2010-07-26 | Fault transient signal imitation device for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275120XU CN201740844U (en) | 2010-07-26 | 2010-07-26 | Fault transient signal imitation device for power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201740844U true CN201740844U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020275120XU Expired - Fee Related CN201740844U (en) | 2010-07-26 | 2010-07-26 | Fault transient signal imitation device for power transmission line |
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| CN (1) | CN201740844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109425803A (en) * | 2017-08-24 | 2019-03-05 | 许继集团有限公司 | A kind of analog quantity disconnection fault detection method, system and acquisition device |
-
2010
- 2010-07-26 CN CN201020275120XU patent/CN201740844U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109425803A (en) * | 2017-08-24 | 2019-03-05 | 许继集团有限公司 | A kind of analog quantity disconnection fault detection method, system and acquisition device |
| CN109425803B (en) * | 2017-08-24 | 2021-06-04 | 许继集团有限公司 | Analog quantity disconnection fault detection method, system and acquisition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20110726 |