CN107490752A - A kind of system and method for simulating ultrahigh frequency partial discharge signal - Google Patents
A kind of system and method for simulating ultrahigh frequency partial discharge signal Download PDFInfo
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- CN107490752A CN107490752A CN201710833410.8A CN201710833410A CN107490752A CN 107490752 A CN107490752 A CN 107490752A CN 201710833410 A CN201710833410 A CN 201710833410A CN 107490752 A CN107490752 A CN 107490752A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Abstract
The present invention provides a kind of system and method for simulating ultrahigh frequency partial discharge signal, and the system includes：Host computer, it, which is used to sending serial ports, instructs to digital signal processing module, wherein described instruct pattern, frequency, sample rate and the envelope waveform for including original local discharge signal；Digital signal processing module, it is used for the instruction for receiving host computer, and the instruction is parsed into the parameter of baseband signal, and the parallel data stream of baseband signal is calculated according to parameter；Field programmable gate array is used to send the frequency and sample rate of the parallel data stream and original local discharge signal to simulation local discharge signal module；Simulate local discharge signal module, the data that the frequency and sample rate of its original local discharge signal for being used to be sent with fixed adjustment clock frequency according to field programmable gate array are transmitted to field programmable gate array carry out frequency conversion, and the data signal after frequency conversion is converted into analog signal output to power amplifier module.
Description
Technical field
The present invention relates to high voltage electric equipment local discharge detection device field-checking field, and more particularly, to
A kind of system and method for simulating ultrahigh frequency partial discharge signal.
Background technology
Partial-discharge ultrahigh-frequency radio wave (Ultra High Frequency, UHF) detection device is a kind of based on spy
The equipment that high-frequency method is monitored on-line to gas-insulated switch (Gas Isolated Switchgear, GIS) shelf depreciation.
Wherein, superfrequency refers to 300MHz~3GHz.
The equipment of verification shelf depreciation UHF detection means is made up of signal source and transmitting antenna, and its Cleaning Principle is to pass through
Signal source Injection Signal into GIS cavitys, then detect the signal with shelf depreciation UHF detection means to be measured.Wherein signal source
It is required that it can produce stable, controllable and to the representative pulse signal of all kinds of typical discharges.It is so-called representative, refer to
Signal source must have preferable similarity with the superfrequency radiation waveform of each quasi-representative local discharge signal, cover roughly the same
Spectral range and there is suitable radiation intensity.
At present, the vendor product of production shelf depreciation equipment is different both at home and abroad, and quality is very different, produces the side of signal source
Formula is mainly that simple program control analog circuit produces steep-sided pulse signal.This output of pulse signal signal has as a drawback that：
(1) form is single.When non-reprogramming exports, the signal of same amplitude same frequency can only be exported.Even with program
Change, caused pulse signal is also only to be changing into other fixed amplitudes and time.It can not launch in the same period
The data of different amplitude different pulse frequencies.(2) signal is sent without representativeness.Research shows that GIS partial discharge will produce
Very steep pulse current is given birth to, and the electromagnetic wave of multi-frequency is radiated to surrounding.Real superfrequency shelf depreciation, can produce multiclass
The discharge scenario of type, such as：It is caused in the rough, installation process of high-pressure conduit outer surface polishing to scratch, lacked caused by scraping
Fall into, spine class can be caused to discharge；High-low pressure conductor or radome connector, which loosen, causes loose contact, can produce suspension class and put
Electricity；Impurity particle is located at the defects of horizontal cavity shell, and free metal particle can be caused to discharge；In insulator casting process because
The defects of stomata that technique is bad internally to be remained, air gap class may be caused to discharge.Current product both domestic and external, can not launch
Meet polytype pulse, more can not real simulation go out superfrequency discharge signal, make verification shelf depreciation UHF detecting instruments
Effect have a greatly reduced quality.
Shelf depreciation is online, the measurement data of off-line monitoring and detection device is as the weight for judging primary equipment operating condition
Index is wanted, its correctness directly affects the correct judgement to primary equipment operating condition, if primary equipment is put in the presence of local
Electric problem, and the data precision that on-line monitoring equipment could not find or monitor is relatively low, fails to cause technical staff's enough attention,
The small hidden danger for often leading to primary equipment develops into the accident of primary equipment；Shelf depreciation not be present in primary equipment, and
On-line monitoring equipment takes place frequently abnormal data, and misleading techniques personnel carry out unnecessary interruption maintenance, certainly will cause manpower, thing again
The waste of power, financial resources, also the stability on operation of power networks and reliability cause influence.
The content of the invention
In order to solve existing for background technology can not real simulation ultrahigh frequency partial discharge signal cause shelf depreciation it is online,
Off-line monitoring and the true technical problem of prohibited data detection, the present invention provide it is a kind of simulate ultrahigh frequency partial discharge signal be
System, the system are used for according to existing typical partial discharge model extracting mode, the Partial Discharge Data collected are passed through
Digital Upward Frequency Conversion Technology launches typical ultrahigh frequency partial discharge signal, and the system includes：
Host computer, it, which is used to sending serial ports, instructs to digital signal processing module, wherein the instruction includes original part
Pattern, frequency, sample rate and the envelope waveform of discharge signal；
Digital signal processing module, it is used for the instruction for receiving host computer, by the pattern of the original local discharge signal,
Frequency, sample rate and envelope waveform are parsed into the parameter of baseband signal, and calculate the parallel of baseband signal according to the parameter
Data flow；
Field programmable gate array, it includes random access memory and serial line interface, wherein, random access memory is used to store number
The parallel data stream of word signal processing module transmission is simultaneously output to simulation local discharge signal module, and serial line interface is used
In receive digital signal processing module transmission original local discharge signal frequency and sample rate and by it with fixed adjustment
Clock frequency is sent to simulation local discharge signal module；
Local discharge signal module is simulated, it is used to send out with fixed adjustment clock frequency according to field programmable gate array
The data that the frequency and sample rate of the original local discharge signal sent are transmitted to field programmable gate array carry out frequency conversion, and will become
Data signal after frequency is converted to analog signal output to power amplifier module；
Power amplifier module, it is used to receive the analog signal of simulation local discharge signal module transfer and amplified.
Preferably, the system also includes original local discharge signal acquisition module, and it is used to generate typical shelf depreciation
The typical discharges spectrogram that model shows under different voltages, and the Partial Discharge Data of the shelf depreciation spectrogram is gathered, wherein
The typical partial discharge model includes high pressure spine model, model suspending, free metal granular model and along surface model.Institute
State and the information such as amplitude, the phase time of typical shelf depreciation type are can extract in the experimental result of typical partial discharge model.For
Meet the information completely and accuracy of Characteristics of Partial Discharge, every kind of typical discharges experimental model can retain 5000 groups of significant figures
According to the data are as original local discharge signal, by digital signal processing module analysis again by simulation shelf depreciation letter
After number module carries out up-conversion, you can the typical superfrequency discharge signal of simulation output.
Preferably, the simulation local discharge signal module includes：
Digital Up Convert unit, its parallel data stream for being used to be transmitted according to random access memory carries out Digital Up Convert, raw
Into shelf depreciation data signal；
Digital Frequency Synthesize unit, it is used for the frequency and sample rate of the local discharge signal transmitted according to serial line interface,
Control the time interval of Digital Up Convert unit generation shelf depreciation data signal；
D/A switch unit, it is used to the shelf depreciation data signal after frequency conversion being converted to simulation local discharge signal.
Preferably, the digital signal processing module is microprocessor.
Preferably, the parallel data stream for the baseband signal that the digital signal processing module calculates is 18bit.
Preferably, the simulation local discharge signal module is quadrature DUC device.
Preferably, the D/A switch unit is 14.
According to another aspect of the present invention, the present invention provides a kind of method for simulating ultrahigh frequency partial discharge signal, described
Method includes：
By the original local discharge signal data of collection by host computer by serial ports instruct in the form of send to data-signal
Processing module, wherein described instruct pattern, frequency, sample rate and the envelope waveform for including original local discharge signal；
Digital signal processing module receives the instruction of host computer, by the pattern of the original local discharge signal, frequency, adopts
Sample rate and envelope waveform are parsed into the parameter of baseband signal, and calculate the parallel data stream of baseband signal；
At the scene in programmable array, the parallel data stream of random access memory storage digital signal processing module transmission
And simulation local discharge signal module is output to, the original part that serial line interface receives digital signal processing module transmission is put
The frequency and sample rate of electric signal are simultaneously sent it to simulation local discharge signal module with fixed adjustment clock frequency；
In local discharge signal module is simulated, parallel data stream that Digital Up Convert unit transmits according to random access memory
Digital Up Convert is carried out, generates shelf depreciation data signal, the part that Digital Frequency Synthesize unit transmits according to serial line interface is put
The frequency and sample rate of electric signal, the time interval of control Digital Up Convert unit generation shelf depreciation data signal, D/A turn
Change unit and the shelf depreciation numeral after frequency conversion is converted into simulation local discharge signal；
Power amplifier module receives the analog signal of simulation local discharge signal module transfer and amplified.
Preferably, the original local discharge signal data of collection include generating typical partial discharge model in different voltages
Under the typical discharges spectrogram that shows, and gather the Partial Discharge Data of the shelf depreciation spectrogram, put wherein the typical case is local
Electric model includes high pressure spine model, model suspending, free metal granular model and along surface model.
Technical scheme provided by the present invention by the extraction of typical discharges experimental model data, can obtain various first
The accurate ultrahigh frequency partial discharge signal of Typical PD Models, the original local discharge signal pass through Digital Up Convert
Afterwards, the higher analog signal of output accuracy, so as to simulation output it is stable, it is controllable and with typical local discharge signal have compared with
The superfrequency radiation waveform of good similarity, substantially increase verification shelf depreciation UHF detecting instruments and to local discharge signal
Carry out the online, sensitivity of off-line monitoring.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is the structure chart of the system of the simulation ultrahigh frequency partial discharge signal of the specific embodiment of the invention；
Fig. 2 is the flow chart of the method for the system of the simulation ultrahigh frequency partial discharge signal of the specific embodiment of the invention.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its
The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.
Fig. 1 is the structure chart of the system of the simulation ultrahigh frequency partial discharge signal of the specific embodiment of the invention.Such as Fig. 1 institutes
Show, the system of simulation ultrahigh frequency partial discharge signal of the present invention includes：
Host computer 101, it, which is used to sending serial ports, instructs to digital signal processing module, wherein the instruction includes original office
Pattern, frequency, sample rate and the envelope waveform of portion's discharge signal；
Digital signal processing module 102, it is used for the instruction for receiving host computer 101, by the original local discharge signal
Pattern, frequency, sample rate and envelope waveform be parsed into the parameter of baseband signal, and baseband signal is calculated according to the parameter
Parallel data stream；
Field programmable gate array 103, it includes random access memory 131 and serial line interface 132, wherein, random access memory
131 are used to store the parallel data stream of the transmission of digital signal processing module 102 and are output to simulation shelf depreciation letter
Number module 104, serial line interface 132 are used for the frequency for receiving the original local discharge signal of the transmission of digital signal processing module 102
Sent with sample rate and by it with fixed adjustment clock frequency to simulation local discharge signal module 104；
Local discharge signal module 104 is simulated, it is used for according to field programmable gate array 103 with fixed adjustment clock
The data that the frequency and sample rate of the original local discharge signal that frequency is sent are transmitted to field programmable gate array 103 become
Frequently, and by the data signal after frequency conversion analog signal output is converted to power amplifier module 105；
Power amplifier module 105, it is used to receive the analog signal of simulation local discharge signal module transfer and put
Greatly.
Preferably, the system also includes original local discharge signal acquisition module 106, and it is used to generating typical local put
The typical discharges spectrogram that electric model shows under different voltages, and the Partial Discharge Data of the shelf depreciation spectrogram is gathered, its
Described in typical partial discharge model include high pressure spine model, model suspending, free metal granular model and along surface model.
The information such as amplitude, the phase time of typical shelf depreciation type are can extract in the experimental result of the typical partial discharge model.
In order to meet the information completely of Characteristics of Partial Discharge and accuracy, every kind of typical discharges experimental model can retain 5000 groups of significant figures
According to the data are as original local discharge signal, by digital signal processing module analysis again by simulation shelf depreciation letter
After number module carries out up-conversion, you can the typical superfrequency discharge signal of simulation output.
Preferably, the simulation local discharge signal module 104 includes：
Digital Up Convert unit 141, it is used to numerically be become according to the parallel data stream that random access memory 131 is transmitted
Frequently, shelf depreciation data signal is generated；
Digital Frequency Synthesize unit 142, its be used for according to serial line interface 132 transmit local discharge signal frequency and adopt
Sample rate, control Digital Up Convert unit 141 generate the time interval of shelf depreciation data signal；
D/A switch unit 143, it is used to the shelf depreciation data signal after frequency conversion being converted to simulation shelf depreciation letter
Number；
Preferably, the digital signal processing module 102 is microprocessor.
Preferably, the parallel data stream for the baseband signal that the digital signal processing module 102 calculates is 18bit.
Preferably, the simulation local discharge signal module 104 is quadrature DUC device.
Preferably, the D/A switch unit 143 is 14.
Fig. 2 is the flow chart of the method for the system of the simulation ultrahigh frequency partial discharge signal of the specific embodiment of the invention.
As shown in Fig. 2 the method for simulation ultrahigh frequency partial discharge signal of the present invention is since step 201.
In step 201, the original local discharge signal data of collection are passed through into host computer transmission in the form of serial ports instructs
To data-signal processing module, wherein described instruct pattern, frequency, sample rate and the Envelop waves for including original local discharge signal
Shape；
In step 202, digital signal processing module receives the instruction of host computer, by the sample of the original local discharge signal
Formula, frequency, sample rate and envelope waveform are parsed into the parameter of baseband signal, and calculate the parallel data stream of baseband signal；
In step 203, at the scene in programmable array, random access memory storage digital signal processing module transmits described
Parallel data stream is simultaneously output to simulation local discharge signal module, and serial line interface receives digital signal processing module transmission
The frequency and sample rate of original local discharge signal are simultaneously sent it to simulation shelf depreciation letter with fixed adjustment clock frequency
Number module；
In step 204, in local discharge signal module is simulated, Digital Up Convert unit transmits according to random access memory
Parallel data stream carries out Digital Up Convert, generates shelf depreciation data signal, Digital Frequency Synthesize unit is according to serial interface oral instructions
The frequency and sample rate of defeated local discharge signal, between the time of control Digital Up Convert unit generation shelf depreciation data signal
Every the shelf depreciation numeral after frequency conversion is converted to simulation local discharge signal by D/A switch unit；
In step 205, power amplifier module receives the analog signal of simulation local discharge signal module transfer and put
Greatly.
Preferably, the original local discharge signal data of collection include generating typical partial discharge model in different voltages
Under the typical discharges spectrogram that shows, and gather the Partial Discharge Data of the shelf depreciation spectrogram, put wherein the typical case is local
Electric model includes high pressure spine model, model suspending, free metal granular model and along surface model.
Normally, all terms used in the claims are all solved according to them in the usual implication of technical field
Release, unless clearly being defined in addition wherein.All references " one/described/be somebody's turn to do【Device, component etc.】" all it is opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurately order, unless explicitly stated otherwise.
Claims (9)
1. a kind of system for simulating ultrahigh frequency partial discharge signal, it is characterised in that the system includes：
Host computer, it, which is used to sending serial ports, instructs to digital signal processing module, wherein the instruction includes original shelf depreciation
Pattern, frequency, sample rate and the envelope waveform of signal；
Digital signal processing module, it is used for the instruction for receiving host computer, by pattern, the frequency of the original local discharge signal
Rate, sample rate and envelope waveform are parsed into the parameter of baseband signal, and baseband signal is calculated according to the parameter and line number
According to stream；
Field programmable gate array, it includes random access memory and serial line interface, wherein, random access memory is used to store digital letter
The parallel data stream of number processing module transmission is simultaneously output to simulation local discharge signal module, and serial line interface is used to connect
Receive digital signal processing module transmission original local discharge signal frequency and sample rate and by it with fixed adjustment clock
Frequency is sent to simulation local discharge signal module；
Local discharge signal module is simulated, it is used for what is sent according to field programmable gate array with fixed adjustment clock frequency
The data that the frequency and sample rate of original local discharge signal are transmitted to field programmable gate array carry out frequency conversion, and by after frequency conversion
Data signal be converted to analog signal output to power amplifier module；
Power amplifier module, it is used to receive the analog signal of simulation local discharge signal module transfer and amplified.
2. system according to claim 1, it is characterised in that the system also includes original local discharge signal collection mould
Block, it is used to generate the typical discharges spectrogram that typical partial discharge model shows under different voltages, and gathers the part and put
The Partial Discharge Data of electric spectrogram, wherein the typical partial discharge model includes high pressure spine model, freely model suspending, gold
Metal particles model and along surface model.
3. the system according to claims 1 or 2, it is characterised in that the simulation local discharge signal module includes：
Digital Up Convert unit, its parallel data stream for being used to be transmitted according to random access memory carry out Digital Up Convert, generation office
Portion's electric discharge data signal；
Digital Frequency Synthesize unit, it is used for the frequency and sample rate of the local discharge signal transmitted according to serial line interface, control
Digital Up Convert unit generates the time interval of shelf depreciation data signal；
D/A switch unit, it is used to the shelf depreciation data signal after frequency conversion being converted to simulation local discharge signal.
4. according to system any one of in claims 1 to 3, it is characterised in that the digital signal processing module is
Microprocessor.
5. according to system any one of in claims 1 to 3, it is characterised in that the digital signal processing module meter
The parallel data stream of the baseband signal calculated is 18bit.
6. according to system any one of in claims 1 to 3, it is characterised in that the simulation local discharge signal mould
Block is quadrature DUC device.
7. according to system any one of in claims 1 to 3, it is characterised in that the D/A switch unit is 14
Position.
A kind of 8. method for simulating ultrahigh frequency partial discharge signal, it is characterised in that methods described includes：
The original local discharge signal data of collection are sent to data-signal by host computer in the form of serial ports instructs and handled
Module, wherein described instruct pattern, frequency, sample rate and the envelope waveform for including original local discharge signal；
Digital signal processing module receives the instruction of host computer, by the pattern of the original local discharge signal, frequency, sample rate
The parameter of baseband signal is parsed into envelope waveform, and calculates the parallel data stream of baseband signal；
At the scene in programmable array, the parallel data stream of random access memory storage digital signal processing module transmission simultaneously will
It is output to simulation local discharge signal module, and serial line interface receives the original shelf depreciation letter of digital signal processing module transmission
Number frequency and sample rate and by its with fixed adjustment clock frequency send to simulation local discharge signal module；
In local discharge signal module is simulated, the parallel data stream that Digital Up Convert unit transmits according to random access memory is carried out
Digital Up Convert, generates shelf depreciation data signal, and the shelf depreciation that Digital Frequency Synthesize unit transmits according to serial line interface is believed
Number frequency and sample rate, the time interval of control Digital Up Convert unit generation shelf depreciation data signal, D/A switch list
Shelf depreciation numeral after frequency conversion is converted to simulation local discharge signal by member；
Power amplifier module receives the analog signal of simulation local discharge signal module transfer and amplified.
9. according to the method for claim 8, it is characterised in that the original local discharge signal data of collection include generation
The typical discharges spectrogram that typical partial discharge model shows under different voltages, and the part for gathering the shelf depreciation spectrogram is put
Electric data, wherein the typical partial discharge model includes high pressure spine model, model suspending, free metal granular model and edge
Surface model.
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| CN201710833410.8A CN107490752B (en) | 2017-09-15 | 2017-09-15 | System and method for simulating ultrahigh frequency partial discharge signal |
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| CN201710833410.8A CN107490752B (en) | 2017-09-15 | 2017-09-15 | System and method for simulating ultrahigh frequency partial discharge signal |
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Cited By (3)
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| CN110673074A (en) * | 2019-08-29 | 2020-01-10 | 国网江西省电力有限公司电力科学研究院 | Partial discharge check signal generator based on digital up-conversion |
| CN111999537A (en) * | 2020-09-29 | 2020-11-27 | 广东电网有限责任公司江门供电局 | Miniature built-in signal generator and cable partial discharge simulation method thereof |
| CN113109680A (en) * | 2021-04-30 | 2021-07-13 | 国家能源集团科学技术研究院有限公司 | Large-scale hydraulic generator stator winding partial discharge analysis system |
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| CN113109680A (en) * | 2021-04-30 | 2021-07-13 | 国家能源集团科学技术研究院有限公司 | Large-scale hydraulic generator stator winding partial discharge analysis system |
| CN113109680B (en) * | 2021-04-30 | 2023-07-28 | 国家能源集团科学技术研究院有限公司 | Partial discharge analysis system for stator winding of large-sized hydraulic generator |
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| Publication number | Publication date |
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| CN107490752B (en) | 2020-08-11 |
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