CN204008852U - Based on Harmonic Measurer device between DSP - Google Patents
Based on Harmonic Measurer device between DSP Download PDFInfo
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- CN204008852U CN204008852U CN201320749265.2U CN201320749265U CN204008852U CN 204008852 U CN204008852 U CN 204008852U CN 201320749265 U CN201320749265 U CN 201320749265U CN 204008852 U CN204008852 U CN 204008852U
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- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model relates to a kind of based on Harmonic Measurer device between DSP, and its structure is that three-phase voltage is connected filtering circuit by voltage transformer (VT) summation current transformer respectively with three-phase current; The output terminal of filtering circuit connects respectively zero passage comparator circuit and A/D sample circuit; The output terminal of zero passage comparator circuit connects phase selection circuit, and the output terminal of phase selection circuit connects phase-locking frequency multiplication circuit, and the output terminal of phase-locking frequency multiplication circuit connects A/D sample circuit, and the output terminal of A/D sample circuit connects dsp chip.The utility model can be tested harmonic wave between electrical network, and test accurately and fast, reaches re-set target, to preventing that equipment from played a role by the infringement of a harmonic wave, and provides foundation for the control of a harmonic wave.
Description
Technical field
The utility model relates to a kind of electric system detecting instrument, relates in particular to a kind ofly based on Harmonic Measurer device between DSP, belongs to intelligent substation technical field.
Background technology
Along with the nonlinear elements such as power electronic equipment being widely used in electrical network, in electrical network except producing the harmonic wave of integer multiple frequency of fundamental frequency, also may produce the non-integral multiple frequency of fundamental frequency between harmonic wave, as 1/2,1/3,1/4 industrial frequency harmonic.Between harmonic wave can serve new problem to electrical network band, as sub-synchronous oscillation, voltage fluctuation and flickering.
Between harmonic wave can cause as reduced in device of overheating of electrical and serviceable life; Cause filter resonance, overload, cause communication interference; Also can cause the digital relay misoperation of zero passage work; Between humorous wave energy the noise and vibration of motor and transformer is increased; Between humorous wave energy make voltage transformer (VT) generation Subharmonic Resonance, cause mutual inductor or Explosion of on Arrester accident.
In prior art, between detection, the method for harmonic wave mainly contains FFT method, wavelet analysis method, AR method and neural network etc., and the application of FFT method is more common, but easy spectrum leakage; Easily there is mixing phenomenon in wavelet analysis method, and AR method and neural network etc. are subject to external interference larger.Transformer station often occur voltage transformer (VT) and with Explosion of on Arrester accident, the Subharmonic Resonance that suspection is caused by a harmonic wave causes, but in the middle of prior art Harmonic Measurer device can not extract any frequency between harmonic signal, so cannot use instrument further to verify.
Utility model content
The utility model is for above-mentioned problems of the prior art, provide a kind of based on Harmonic Measurer device between DSP, by HHT (Hilbert-Huang Transform, HHT) conversion be used between harmonic wave detect, solved in prior art, cannot extract any frequency between the problem of harmonic signal.
The technical solution of the utility model is as follows:
Three-phase voltage is connected filtering circuit by voltage transformer (VT) summation current transformer respectively with three-phase current; The output terminal of filtering circuit connects respectively zero passage comparator circuit and A/D sample circuit; The output terminal of zero passage comparator circuit connects phase selection circuit, and the output terminal of phase selection circuit connects phase-locking frequency multiplication circuit, and the output terminal of phase-locking frequency multiplication circuit connects A/D sample circuit, and the output terminal of A/D sample circuit connects dsp chip.
Described A/D sample circuit is selected ADS1178 chip.
Described dsp chip is TMS320VC5509A chip.
Described dsp chip output terminal connects RS232 interface, keyboard input port and display.
The utility model has the advantages of as follows:
The utility model test accurately and fast; Effectively reduce monitoring error; Power-dissipation-reduced.
That the core processor of this device is selected is TMS320VC5509A.This chip is the l6 bit fixed-point DSP chip that a cost performance is very high, and it has good inheritance to C54x, inherited its low-power consumption, development trend cheaply, but performance is higher in contrast, and that power consumption is fallen is lower.Processing speed is faster, dual-core architecture, processing speed 400MIPS.
A/D change-over circuit is selected ADS1178 chip, it is a kind of 8 passages of high speed, the Data Acquisition System Chip of 16, can to 4 road voltages and 4 road current signals, sample, the phase delay can erasure signal causing due to Sampling, reduces monitoring error effectively simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation block diagram of the present utility model.
Embodiment
embodiment
Three-phase voltage is connected filtering circuit by voltage transformer (VT) summation current transformer respectively with three-phase current; The output terminal of filtering circuit connects respectively zero passage comparator circuit and A/D sample circuit; The output terminal of zero passage comparator circuit connects phase selection circuit, and the output terminal of phase selection circuit connects phase-locking frequency multiplication circuit, and the output terminal of phase-locking frequency multiplication circuit connects A/D sample circuit, and the output terminal of A/D sample circuit connects dsp chip.
Described A/D sample circuit is selected ADS1178 chip.
Described dsp chip is TMS320VC5509A chip.
Described dsp chip output terminal connects RS232 interface, keyboard input port and display.
The utility model carries out a harmonic wave testing experiment in 66kV transformer station, and test accurately and fast, reaches re-set target.The above is specific embodiment of the utility model and the know-why used, and any equivalent transformation based on technical solutions of the utility model basis, within all belonging to protection domain of the present utility model.
Claims (2)
1. based on Harmonic Measurer device between DSP, it is characterized in that three-phase voltage is connected filtering circuit by voltage transformer (VT) summation current transformer respectively with three-phase current; The output terminal of filtering circuit connects respectively zero passage comparator circuit and A/D sample circuit; The output terminal of zero passage comparator circuit connects phase selection circuit, and the output terminal of phase selection circuit connects phase-locking frequency multiplication circuit, and the output terminal of phase-locking frequency multiplication circuit connects A/D sample circuit, and the output terminal of A/D sample circuit connects dsp chip; Described A/D sample circuit is selected ADS1178 chip; Described dsp chip is TMS320VC5509A chip.
2. according to claim 1 based on Harmonic Measurer device between DSP, it is characterized in that described dsp chip output terminal connects RS232 interface, keyboard input port and display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749265.2U CN204008852U (en) | 2013-11-25 | 2013-11-25 | Based on Harmonic Measurer device between DSP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749265.2U CN204008852U (en) | 2013-11-25 | 2013-11-25 | Based on Harmonic Measurer device between DSP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204008852U true CN204008852U (en) | 2014-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320749265.2U Expired - Fee Related CN204008852U (en) | 2013-11-25 | 2013-11-25 | Based on Harmonic Measurer device between DSP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204008852U (en) |
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2013
- 2013-11-25 CN CN201320749265.2U patent/CN204008852U/en not_active Expired - Fee Related
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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: 20141210 Termination date: 20181125 |