CN109783981A - The determination method, apparatus and intelligent terminal of insulation system dielectric spectra - Google Patents
The determination method, apparatus and intelligent terminal of insulation system dielectric spectra Download PDFInfo
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Abstract
The present invention provides acquisition methods, device and the intelligent terminals of a kind of insulation system dielectric spectra, it is related to the characteristic technical field of insulation system, this method comprises: obtaining the voltage signal excitation of insulation system and the background mathematics model of characterization insulation system effect of electromagnetic field；It is motivated according to voltage signal, obtains the residual sum of squares (RSS) of the output current signal of insulation system and the output current signal of background mathematics model；Using residual sum of squares (RSS) minimum as the parameter of optimization aim adjustment mathematical model, to determine the equivalent mathematical model of insulation system；It is input to equivalent mathematical model to by the sinusoidal excitation of different frequency, to determine the dielectric spectra of insulation system.The present invention can effectively improve the efficiency of determining insulation system dielectric spectra.
Description
Technical field
The present invention relates to the characteristic technical fields of insulation system, more particularly, to a kind of determination side of insulation system dielectric spectra
Method, device and intelligent terminal.
Background technique
Important information relevant to material Polarization Mechanism and lattice vibration etc. is contained in dielectric spectra, is a kind of characterization electricity Jie
The important means of material performance, traditional dielectric spectra test method are all made of standard sine wave as driving voltage, with frequency sweep
Mode complete the test in high frequency to low-frequency range, main problem is under low frequency that time of measuring is too long, efficiency is lower.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of determination method, apparatus of insulation system dielectric spectra and intelligence
Terminal can effectively improve the efficiency of determining insulation system dielectric spectra.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
In a first aspect, the embodiment of the invention provides a kind of determination methods of insulation system dielectric spectra, comprising: obtain insulation
The voltage signal of system motivates and the background mathematics model of characterization insulation system effect of electromagnetic field；It is motivated according to voltage signal,
Obtain the residual sum of squares (RSS) of the output current signal of insulation system and the output current signal of background mathematics model；Wherein, residual error
Quadratic sum has minimum；Using the minimum of residual sum of squares (RSS) as the parameter of optimization aim adjustment background mathematics model, with determination
The equivalent mathematical model of insulation system；Wherein, the corresponding numerical value of parameter is related to the size of residual sum of squares (RSS)；By different frequency
Sinusoidal excitation is input to equivalent mathematical model, to determine the dielectric spectra of insulation system.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein root
It is motivated according to voltage signal, the residual error for obtaining the output current signal of insulation system and the output current signal of background mathematics model is flat
Side and the step of, comprising: to insulation system apply voltage signal excitation, to obtain the output current signal of insulation system；It will be electric
Press signal excitation as the input signal of basic mathematical model；According to the input signal of background mathematics model, background mathematics is obtained
The output current signal of model；According to the difference of the output current signal of insulation system and the output current signal of background mathematics model
Value, is calculated residual sum of squares (RSS).
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein really
The step of determining the dielectric spectra of insulation system, comprising: the dielectric spectra of equivalent mathematical model is obtained by simulation calculation；By equivalent mathematical
Dielectric spectra of the dielectric spectra of model as insulation system.
With reference to first aspect, the embodiment of the invention provides the third possible embodiments of first aspect, wherein base
Plinth mathematical model includes unbalanced input unit, linear dynamic unit and output nonlinear unit, the letter of unbalanced input unit
Number f (x) indicates are as follows:
F (x)=f0+f1x+f2x2+f3x3+…+fnxn
Wherein, f0、f1…fn, it is the parameter of background mathematics model；
The function G (z) of linear dynamic link is indicated are as follows:
Wherein, a0、a1…acAnd b0、b1…bdIt is the parameter of background mathematics model, c and d indicate linear dynamic unit
Order；
The function k (x) of output nonlinear unit is indicated are as follows:
K (x)=k0+k1x+k2x2+k3x3+…+knxn
Wherein, k0、k1…knIt is the parameter of background mathematics model.
The third possible embodiment with reference to first aspect, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein the output function u of unbalanced input unitL(n) it indicates are as follows:
uL(n)=f0+f1u(n)+f2u2(n)+...+feue(n)
Wherein, e indicates the order of unbalanced input unit and the order of output nonlinear unit；
The output function x of linear dynamic unitL(n) it indicates are as follows:
The output function x (n) of output nonlinear unit is indicated are as follows:
X (n)=k0+k1xL(n)+k2x2 L(n)+...+kexe L(n)
Wherein, k0、k1…keIt is the parameter of background mathematics model.
The 4th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 5th kind of first aspect
Possible embodiment, wherein residual sum of squares (RSS) J (θ) is indicated are as follows:
Wherein, N is preset acquisition sample of signal value, and y (n) is the output current signal of insulation system.
Second aspect, the embodiment of the present invention also provide a kind of determining device of insulation system dielectric spectra, comprising: obtain mould
Block, the voltage signal for obtaining insulation system motivates and the background mathematics model of characterization insulation system effect of electromagnetic field；It is flat
Side and acquisition module obtain the output current signal and background mathematics model of insulation system for motivating according to voltage signal
The residual sum of squares (RSS) of output current signal；Wherein, residual sum of squares (RSS) has minimum；Parameter adjustment module is used for residuals squares
Parameter of the minimum of sum as optimization aim adjustment background mathematics model, to determine the equivalent mathematical model of insulation system；Its
In, the corresponding numerical value of parameter is related to the size of residual sum of squares (RSS)；Dielectric spectra determining module, for swashing the sine of different frequency
It encourages and is input to equivalent mathematical model, to determine the dielectric spectra of insulation system.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein flat
Side and acquisition module are used for: applying voltage signal excitation to insulation system, to obtain the output current signal of insulation system；It will be electric
Press signal excitation as the input signal of basic mathematical model；According to the input signal of background mathematics model, background mathematics is obtained
The output current signal of model；According to the difference of the output current signal of insulation system and the output current signal of background mathematics model
Value, is calculated residual sum of squares (RSS).
The third aspect, the embodiment of the invention provides a kind of intelligent terminals, including processor and memory；It is deposited on memory
Computer program is contained, computer program executes the 5th kind of possibility such as first aspect to first aspect when being run by processor
Any one of embodiment method.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, computer readable storage mediums
On be stored with computer program, above-mentioned first aspect is executed when computer program is run by processor to the 5th kind of first aspect
The step of method of any one of possible embodiment.
The embodiment of the invention provides a kind of determination method, apparatus of insulation system dielectric spectra and intelligent terminals, by obtaining
It takes the voltage signal of insulation system to motivate and characterize the background mathematics model of insulation system effect of electromagnetic field, and is believed according to voltage
Number excitation, obtain the residual sum of squares (RSS) of the output current signal of insulation system and the output current signal of background mathematics model, from
And using the minimum of residual sum of squares (RSS) as the parameter of optimization aim adjustment background mathematics model, to determine the equivalent of insulation system
Mathematical model, and then the sinusoidal excitation of different frequency is input to equivalent mathematical model, to determine the dielectric spectra of insulation system.By
It is motivated in the present invention according to the voltage signal of insulation system, Jie of insulation system is determined using the equivalent mathematical model of insulation system
Electricity spectrum, compared to traditional longer sweep method of required time, can effectively improve the efficiency of determining dielectric spectra.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 shows a kind of flow chart of the determination method of insulation system dielectric spectra provided by the embodiment of the present invention；
Fig. 2 shows a kind of schematic illustrations of System Discrimination provided by the embodiment of the present invention；
Fig. 3 shows a kind of schematic diagram of equivalent mathematical model calculating frequency domain data provided by the embodiment of the present invention；
Fig. 4 shows the flow chart of the determination method of another kind insulation system dielectric spectra provided by the embodiment of the present invention；
Fig. 5 shows a kind of schematic diagram of input voltage signal provided by the embodiment of the present invention；
Fig. 6 shows a kind of schematic diagram of data collection system provided by the embodiment of the present invention；
Fig. 7 shows a kind of schematic diagram of driving voltage and response current provided by the embodiment of the present invention；
Fig. 8 shows a kind of structural schematic diagram of mathematical model provided by the embodiment of the present invention；
Fig. 9 shows a kind of structural block diagram of the parameter determining device of insulation system provided by the embodiment of the present invention；
Figure 10 shows a kind of structural schematic diagram of intelligent terminal provided by the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Dielectric spectra test method traditional at present is all made of standard sine wave as driving voltage, has been come in a manner of frequency sweep
At the test in high frequency to low-frequency range, main problem is under low frequency that time of measuring is too long, significantly limits this method
Application range is based on this, and the determination method, apparatus and intelligence of a kind of insulation system dielectric spectra provided in an embodiment of the present invention are eventually
End, can effectively improve the efficiency of determining dielectric spectra.
For convenient for understanding the present embodiment, first to a kind of insulation system dielectric spectra disclosed in the embodiment of the present invention
Determination method describe in detail.
A kind of flow chart of the determination method of insulation system dielectric spectra shown in Figure 1, this method is by such as computer
Equal intelligent terminals execute, method includes the following steps:
Step S102 obtains the background mathematics model of the voltage signal excitation and insulation system of insulation system.
Insulation system includes transformer, and insulation system has certain want to voltage signal excitation i.e. identification stimulus
It asks, basic demand is that voltage signal motivates in duration, all mode of insulation system, the i.e. dynamic characteristic of system, all
It can be sufficiently excited, this requires input signal, that is, voltage signal excitations sufficiently wide frequency band, at least covers insulation system
Working frequency range.The present invention chooses the white noise signal of amplitude consecutive variations as input voltage signal u (t), and white noise signal can
It is generated by randomizer, by adjusting the sample rate generated when white noise signal occurs, to adjust the frequency of white noise signal
Rate component, u (t) signal amplitude need to be determined jointly according to sample and test hardware.If insulation system is transformer, according to change
The concrete type and characteristic of depressor can determine the background mathematics model of transformer, and mathematical model includes traditional linear, non-thread
Property and model of mind etc., it is contemplated that the transformer that insulation system includes will show linear and non-linear spy at different conditions
Property, select the mathematical model that non-linear and linear characteristic behavior can be described.
Step S104, is motivated according to voltage signal, obtains the output current signal and background mathematics model of insulation system
The residual sum of squares (RSS) of output current signal；Wherein, residual sum of squares (RSS) has minimum.
Voltage signal excitation u (t) is applied to insulation system, obtains the output current signal of insulation system, such as responds electricity
It flows i (t), and the input signal by voltage signal excitation as the background mathematics model of insulation system, to obtain mathematical model
Output current signal, it is poor to make to the output current signal of the output current signal of insulation system and background mathematics model, obtains
Residual sum of squares (RSS) e (t).
Step S106, using the minimum of residual sum of squares (RSS) as the parameter of optimization aim adjustment background mathematics model, with true
Determine the equivalent mathematical model of insulation system；Wherein, the corresponding numerical value of parameter is related to the size of residual sum of squares (RSS).
When residual sum of squares (RSS) e (t) tends to 0, it is believed that the mathematical model and insulation system established in certain frequency range
It is equivalent, parameter corresponding specific value at the minimum of residual sum of squares (RSS) is obtained by calculation, with determine insulation system etc.
Imitate mathematical model.
The sinusoidal excitation of different frequency is input to equivalent mathematical model by step S108, to determine the dielectric of insulation system
Spectrum.
Sinusoidal sequence driving voltage is successively applied to determining equivalent mathematical model, corresponding response current letter can be obtained
Number, the dielectric parameter under each frequency further can be obtained by the calculation formula of dielectric loss, then complete drawing for dielectric spectra
System, using the dielectric spectra of equivalent mathematical model as the dielectric spectra of insulation system, a kind of principle of System Discrimination as shown in Figure 2 is shown
It is intended to, test macro is insulation system in Fig. 2, and u (t) is input identification signal, that is, above-mentioned input voltage signal, and y (t) represents exhausted
Edge system inputs the response signal under identification signal,For the response signal of mathematical model under identical incentive action, v (t) is
Simulate outside noise, e (t) be y (t) withDifference, indicate establish mathematical model and actual insulation system between mistake
Difference.
In one embodiment, using the quadratic sum of e (t) as objective function, square of e (t) is acquired with optimization algorithm
The minimum of sum can be obtained the corresponding numerical value of parameters in mathematical model, to obtain in low-frequency range interior insulation system
Equivalent mathematical model, a kind of equivalent mathematical model as shown in Figure 3 calculates the schematic diagram of frequency domain data, to equivalent mathematical model
Successively apply low-frequency standard sinusoidal sequence and motivate u, that is, above-mentioned u (t), can be obtained the response signal i of the mathematical model of low-frequency range i.e. on
I (t) is stated, response signal passes through medium by FFT (Fast Fourier Transformation) i.e. fast Fourier transform
The dielectric parameter under each frequency excitation of low-frequency range can be obtained in the calculation formula of loss, to complete low-frequency range dielectric spectroscopy
Draw, it is shorter the time required to high-frequency range conventional method, can be directly used sweep check, and after the completion of re-test with it is low
The result that frequency range is quickly tested is spliced, and the dielectric spectroscopy in whole frequency range is finally obtained.
The determination method of above-mentioned insulation system dielectric spectra provided in an embodiment of the present invention, by the voltage for obtaining insulation system
The background mathematics model of signal excitation and characterization insulation system effect of electromagnetic field, and motivated according to voltage signal, it is insulated
The residual sum of squares (RSS) of the output current signal of the output current signal and background mathematics model of system, thus by residual sum of squares (RSS)
Parameter of the minimum as optimization aim adjustment background mathematics model, to determine the equivalent mathematical model of insulation system, and then will
The sinusoidal excitation of different frequency is input to equivalent mathematical model, to determine the dielectric spectra of insulation system.Since the present invention is according to absolutely
The voltage signal of edge system motivates, and the dielectric spectra of insulation system is determined using the equivalent mathematical model of insulation system, compared to tradition
The longer sweep method of required time, the efficiency of determining dielectric spectra can be effectively improved.
For ease of understanding, the determination method based on another insulation system dielectric spectra provided in this embodiment is given below,
A kind of flow chart of the determination method of insulation system dielectric spectra shown in Figure 4, method includes the following steps:
Step S402 obtains the background mathematics model of the voltage signal excitation and insulation system of insulation system.
In one embodiment, voltage signal excitation as shown in figure 5, voltage signal excitation duration be 625 seconds,
Sample frequency is 0.04Hz, and insulation system uses transformer Oil-Paper Insulation, and voltage signal is motivated for motivating insulation system
In the dynamic characteristic of 1mHz-0.05Hz.
Step S404 applies voltage signal excitation to insulation system, to obtain the output current signal of insulation system.
Specifically, upper computer software is to be based in Fig. 6 as Fig. 6 shows a kind of schematic diagram of data collection system
LabVIEW exploitation, have the function of acquisition in real time, analysis, display and management measurement data.The number that testing system software generates
Word pumping signal forms the i.e. above-mentioned input voltage of corresponding analogue stimulus signal by D/A in analog-digital converter (DAC) i.e. figure and believes
Number, and tested insulation system is acted on, response current amplitude faint under pumping signal is amplified to modulus by micro current amplifier
In converter (ADC) i.e. figure in the measurable range of A/D.Two-way analog signal (pumping signal and response current signal) passes through
ADC is converted into being sent to host computer after digital signal to be analyzed in real time.Wherein, DAC model NI 9269, precision are 16；
Synchronized sampling is needed due to accurately to obtain voltage and current phase relation, ADC under each harmonic frequency, it is desirable that each channel respectively has
One independent analog-to-digital conversion.ADC model NI 9218DSUB, two channel/simultaneous data-acquisitions, precision are 24, are often led to
Road highest sample frequency 52.1kS/s；Four slot USB cabinet Compact_DAQ 9174 separately are equipped with for capture card, it is portable
The effects of data acquisition platform can continuously read and write waveform measurement data, play functional configuration, connection and shielding interference.FA grades micro-
Faint response current is converted into the analog voltage of corresponding amplification factor, furthermore cable by current amplifier model HB-321
For twisted-pair shielded wire, can the influence by conducting wire to test result be preferably minimized.
Fig. 7 shows the schematic diagram of a kind of driving voltage and response current, and the driving voltage and response current in Fig. 7 are logical
What the major insulation progress crossed between a transformer high-low-voltage collected after quickly testing, change more gentle for response current
The waveform of signal, what is changed greatly is the waveform of driving voltage signal.
Step S406, the input signal by voltage signal excitation as basic mathematical model.
Voltage signal excitation u (t) of insulation system is the white noise signal for the amplitude consecutive variations chosen, specifically above-mentioned
It is stated that, details are not described herein in embodiment, and the input signal of background mathematics model is that the voltage signal of insulation system motivates u
(t)。
Step S408 obtains the output current signal of background mathematics model according to the input signal of background mathematics model.
In view of the linear and nonlinear characteristic that the sample of insulation system shows at different conditions, choose
Background mathematics model of the Hammerstein-Wiener nonlinear model as insulation system, a kind of mathematical modulo as shown in Figure 8
The structural schematic diagram of type, the basic structure of Hammerstein-Wiener nonlinear model are an input static non linear unit
One dynamic linear unit G (z) of f () series connection connects one again exports static non linear unit k ().
The function f (x) of unbalanced input unit is indicated are as follows:
F (x)=f0+f1x+f2x2+f3x3+…+fnxn
Wherein, f0、f1…fn, it is the parameter of background mathematics model；
The function G (z) of linear dynamic link is indicated are as follows:
Wherein, a0、a1…acAnd b0、b1…bdIt is the parameter of background mathematics model, c and d indicate linear dynamic unit
Order；
The function k (x) of output nonlinear unit is indicated are as follows:
K (x)=k0+k1x+k2x2+k3x3+…+knxn
Wherein, k0、k1…knIt is the parameter of background mathematics model.
Step S410, according to the difference of the output current signal of insulation system and the output current signal of background mathematics model
Value, is calculated residual sum of squares (RSS).
Specifically, first determining mathematical model order, i.e. linear element G (z) sub- denominator order c, d and nonlinear element f
The order e of () and k (), can be used enumerative technique, successively assume the model of different orders, carry out parameter identification and determine parameter
Corresponding numerical value.Error criterion is used to evaluate recognizing every time as a result, final with the corresponding order of identification result evaluation soprano
It is determined as the order of equivalent mathematical model.It is recognized using normalization root-mean-square error and final prediction error as scoring model
Bad judgment criterion, and choose and evaluate best person as finally determining equivalent mathematical model.Wherein normalize root-mean-square error
It is deformed into the form of percentage, the degree of fitting of model output with real system output is indicated, is best with 100%.Finally
Predict error criterion with its minimum value be it is best, choose two kinds of criterion, a kind of calculating formula of criterion FitPercent is as follows:
Wherein y (i) is the output signal of insulation system,For mathematical model output signal, μ isAverage value, N
For the sample number of acquisition.
The calculating formula of another criterion FPE indicates are as follows:
Wherein npFor the number of model parameter.
In general, the order of linear element is determined as c=9, d=9, and when nonlinear element order is determined as e=9, identification
Obtained model is the most accurate.
After the order for determining mathematical model, the corresponding parameters of the order should be completed according to the inputoutput data of measurement
Identification.The identification problem of parameter, which is often converted into, seeks mathematical model output signal and test insulation system real output signal
The optimization problem of residual sum of squares (RSS) minimum, optimized parameter make residual sum of squares (RSS) obtain minimum, think mathematical modulo at this time
Type and test insulation system are equivalent.
The discrete input and output of mathematical model are expressed formula and are indicated in the form of difference equation, the output of unbalanced input unit
Function uL(n) it indicates are as follows:
uL(n)=f0+f1u(n)+f2u2(n)+...+feue(n)
Wherein, e indicates the order of unbalanced input unit and the order of output nonlinear unit；
The output function x of linear dynamic unitL(n) it indicates are as follows:
The output function x (n) of output nonlinear unit is indicated are as follows:
X (n)=k0+k1xL(n)+k2x2 L(n)+...+kexe L(n)
Wherein, k0、k1…keIt is the parameter of background mathematics model.
According to above-mentioned each output function, residual sum of squares (RSS) J (θ) is indicated are as follows:
Wherein, θ is parameter matrix, and N is preset acquisition sample of signal value, and y (n) is the output signal of insulation system.
Step S412, using the minimum of residual sum of squares (RSS) as the parameter of optimization aim adjustment background mathematics model, with true
Determine the equivalent mathematical model of insulation system；Wherein, the corresponding numerical value of parameter is related to the size of residual sum of squares (RSS).
The optimal solution of demand parameter matrix θ, so that residual sum of squares (RSS) J (θ) obtains minimum, using Gauss-Newton iteration
Method can seek in limited times iteration to its optimal solution, after obtaining parametric optimal solution, can obtain after substituting into corresponding model structure
Equivalent mathematical model is obtained, it is as shown in table 1 to the equivalent model parameter obtained after transformer testing.
The transformer insulated equivalent model parameter of table 1
Step S414 obtains the dielectric spectra of equivalent mathematical model by simulation calculation.
In one embodiment, the equivalent mathematical that the dielectric spectra of 1mHz-0.05Hz low-frequency range is obtained by above-mentioned parameter
Model carries out simulation calculation according to method shown in Fig. 3 and obtains, and biography can be directly used in the dielectric spectra of 0.08Hz-1kHz high-frequency range
The sweep check of system obtains, and two sections of dielectric spectras are carried out to splice the dielectric spectra that can be obtained in 1mHz-1kHz whole frequency range.When
So, the dielectric spectra of high-frequency range can also be obtained by above-mentioned equivalent mathematical model, since traditional sweep check is in high-frequency range
Required time is shorter, and the dielectric spectra that sweep method obtains high-frequency range also can be directly used.
Step S416, using the dielectric spectra of equivalent mathematical model as the dielectric spectra of insulation system.
The dielectric spectra of equivalent mathematical model obtained above is the dielectric spectra of corresponding insulation system.
In conclusion the determination method of above-mentioned insulation system dielectric spectra provided in an embodiment of the present invention, according to insulation system
Input signal, the dielectric spectra of insulation system is determined using the equivalent mathematical model of insulation system, compared to traditional required time
Longer sweep method can effectively improve the efficiency of determining dielectric spectra.
Corresponding to the determination method of aforementioned dielectric system dielectric spectra, the embodiment of the invention provides a kind of insulation system dielectrics
The determining device of spectrum, referring to a kind of structural block diagram of the determining device of insulation system dielectric spectra shown in Fig. 9, the device include with
Lower module:
Module 902 is obtained, the voltage signal for obtaining insulation system motivates and characterization insulation system effect of electromagnetic field
Background mathematics model；
Quadratic sum obtains module 904 and obtains the output current signal and base of insulation system for motivating according to voltage signal
The residual sum of squares (RSS) of the output current signal of plinth mathematical model；Wherein, residual sum of squares (RSS) has minimum；
Parameter adjustment module 906, for adjusting background mathematics model for the minimum of residual sum of squares (RSS) as optimization aim
Parameter, to determine the equivalent mathematical model of insulation system；Wherein, the size phase of the corresponding numerical value of parameter and residual sum of squares (RSS)
It closes；
Dielectric spectra determining module 908, it is exhausted to determine for the sinusoidal excitation of different frequency to be input to equivalent mathematical model
The dielectric spectra of edge system.The determining device of above-mentioned insulation system dielectric spectra provided in an embodiment of the present invention, according to insulation system
Input signal determines the dielectric spectra of insulation system using the equivalent mathematical model of insulation system, compared to traditional required time compared with
Long sweep method can effectively improve the efficiency of determining dielectric spectra.
Above-mentioned quadratic sum obtains module 904 and is further used for: applying voltage signal excitation to insulation system, to be insulated
The output current signal of system；Input signal by voltage signal excitation as basic mathematical model；According to background mathematics model
Input signal, obtain the output current signal of background mathematics model；According to the output current signal of insulation system and basic number
The difference for learning the output current signal of model, is calculated residual sum of squares (RSS).
The technical effect of device provided by the present embodiment, realization principle and generation is identical with previous embodiment, for letter
It describes, Installation practice part does not refer to place, can refer to corresponding contents in preceding method embodiment.
The embodiment of the invention provides a kind of intelligent terminal, a kind of structural representation of intelligent terminal shown in Figure 10
Figure, the intelligent terminal include: processor 100, memory 101, bus 102 and communication interface 103, the processor 100, communication
Interface 103 and memory 101 are connected by bus 102；Processor 100 is for executing the executable mould stored in memory 101
Block, such as computer program.
Wherein, memory 101 may include high-speed random access memory (RAM, Random AccessMemory),
It may further include non-labile memory (non-volatile memory), for example, at least a magnetic disk storage.By extremely
A few communication interface 103 (can be wired or wireless) is realized logical between the system network element and at least one other network element
Letter connection, can be used internet, wide area network, local network, Metropolitan Area Network (MAN) etc..
Bus 102 can be isa bus, pci bus or eisa bus etc..The bus can be divided into address bus, number
According to bus, control bus etc..Only to be indicated with a four-headed arrow in Figure 10 convenient for indicating, it is not intended that only one total
Line or a type of bus.
Wherein, memory 101 is for storing program, and the processor 100 executes the journey after receiving and executing instruction
Sequence, method performed by the device that the stream process that aforementioned any embodiment of the embodiment of the present invention discloses defines can be applied to handle
In device 100, or realized by processor 100.
Processor 100 may be a kind of IC chip, the processing capacity with signal.It is above-mentioned during realization
Each step of method can be completed by the integrated logic circuit of the hardware in processor 100 or the instruction of software form.On
The processor 100 stated can be general processor, including central processing unit (Central Processing Unit, abbreviation
CPU), network processing unit (Network Processor, abbreviation NP) etc.；It can also be digital signal processor (Digital
Signal Processing, abbreviation DSP), specific integrated circuit (Application Specific Integrated
Circuit, abbreviation ASIC), ready-made programmable gate array (Field-Programmable Gate Array, abbreviation FPGA) or
Person other programmable logic device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute sheet
Disclosed each method, step and logic diagram in inventive embodiments.General processor can be microprocessor or the processing
Device is also possible to any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in
Hardware decoding processor executes completion, or in decoding processor hardware and software module combination execute completion.Software mould
Block can be located at random access memory, flash memory, read-only memory, programmable read only memory or electrically erasable programmable storage
In the storage medium of this fields such as device, register maturation.The storage medium is located at memory 101, and processor 100 reads memory
Information in 101, in conjunction with the step of its hardware completion above method.
The embodiment of the invention also provides a kind of computer readable storage medium, it is stored on computer readable storage medium
Computer program, when computer program is run by processor the step of the method for any one of execution previous embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can be with reference to the corresponding process in previous embodiment, and details are not described herein.
The determination method, apparatus of insulation system dielectric spectra provided by the embodiment of the present invention and the computer journey of intelligent terminal
Sequence product, the computer readable storage medium including storing program code, the instruction that said program code includes can be used for holding
Row previous methods method as described in the examples, specific implementation can be found in embodiment of the method, and details are not described herein.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of determination method of insulation system dielectric spectra characterized by comprising
The voltage signal excitation for obtaining insulation system and the background mathematics model for characterizing the insulation system effect of electromagnetic field；
It is motivated according to the voltage signal, obtains the defeated of the output current signal of the insulation system and the background mathematics model
The residual sum of squares (RSS) of current signal out；Wherein, the residual sum of squares (RSS) has minimum；
The parameter that the background mathematics model is adjusted using the minimum of the residual sum of squares (RSS) as optimization aim, described in determination
The equivalent mathematical model of insulation system；Wherein, the corresponding numerical value of the parameter is related to the size of the residual sum of squares (RSS)；
The sinusoidal excitation of different frequency is input to the equivalent mathematical model, with the dielectric spectra of the determination insulation system.
2. being obtained described exhausted the method according to claim 1, wherein described motivate according to the voltage signal
The step of residual sum of squares (RSS) of the output current signal of the output current signal of edge system and the background mathematics model, comprising:
The voltage signal excitation is applied to the insulation system, to obtain the output current signal of the insulation system；
The voltage signal is motivated into the input signal as the background mathematics model；
According to the input signal of the background mathematics model, the output current signal of the background mathematics model is obtained；
According to the difference of the output current signal of the insulation system and the output current signal of the background mathematics model, calculate
Obtain residual sum of squares (RSS).
3. the method according to claim 1, wherein the step of dielectric spectra of the determination insulation system,
Include:
The dielectric spectra of the equivalent mathematical model is obtained by simulation calculation；
Using the dielectric spectra of the equivalent mathematical model as the dielectric spectra of the insulation system.
4. the method according to claim 1, wherein the background mathematics model include unbalanced input unit,
The function f (x) of linear dynamic unit and output nonlinear unit, the unbalanced input unit is indicated are as follows:
F (x)=f0+f1x+f2x2+f3x3+…+fnxn
Wherein, f0、f1…fn, it is the parameter of the background mathematics model；
The function G (z) of the linear dynamic link is indicated are as follows:
Wherein, a0、a1…acAnd b0、b1…bdIt is the parameter of the background mathematics model, c and d indicate the linear dynamic
The order of unit；
The function k (x) of the output nonlinear unit is indicated are as follows:
K (x)=k0+k1x+k2x2+k3x3+…+knxn
Wherein, k0、k1…knIt is the parameter of the background mathematics model.
5. according to the method described in claim 4, it is characterized in that, the output function u of the unbalanced input unitL(n) it indicates
Are as follows:
uL(n)=f0+f1u(n)+f2u2(n)+...+feue(n)
Wherein, e indicates the order of the unbalanced input unit and the order of the output nonlinear unit；
The output function x of the linear dynamic unitL(n) it indicates are as follows:
The output function x (n) of the output nonlinear unit is indicated are as follows:
X (n)=k0+k1xL(n)+k2x2 L(n)+...+kexe L(n)
Wherein, k0、k1…keIt is the parameter of the background mathematics model.
6. according to the method described in claim 5, it is characterized in that, the residual sum of squares (RSS) J (θ) is indicated are as follows:
Wherein, N is preset acquisition sample of signal value, and y (n) is the output current signal of the insulation system.
7. a kind of determining device of insulation system dielectric spectra characterized by comprising
Module is obtained, the voltage signal for obtaining insulation system motivates and characterize the base of the insulation system effect of electromagnetic field
Plinth mathematical model；
Quadratic sum obtains module, for being motivated according to the voltage signal, obtain the output current signal of the insulation system with
The residual sum of squares (RSS) of the output current signal of the background mathematics model；Wherein, the residual sum of squares (RSS) has minimum；
Parameter adjustment module, for adjusting the background mathematics model for the minimum of the residual sum of squares (RSS) as optimization aim
Parameter, with the equivalent mathematical model of the determination insulation system；Wherein, the corresponding numerical value of the parameter and the residuals squares
To size it is related；
Dielectric spectra determining module, for the sinusoidal excitation of different frequency to be input to the equivalent mathematical model, described in determination
The dielectric spectra of insulation system.
8. device according to claim 7, which is characterized in that the quadratic sum obtains module and is used for:
The voltage signal excitation is applied to the insulation system, to obtain the output current signal of the insulation system；
The voltage signal is motivated into the input signal as the background mathematics model；
According to the input signal of the background mathematics model, the output current signal of the background mathematics model is obtained；
According to the difference of the output current signal of the insulation system and the output current signal of the background mathematics model, calculate
Obtain residual sum of squares (RSS).
9. a kind of intelligent terminal, which is characterized in that including processor and memory；
Computer program is stored on the memory, the computer program executes such as right when being run by the processor
It is required that 1 to 6 described in any item methods.
10. a kind of computer readable storage medium, computer program, feature are stored on the computer readable storage medium
The step of being, the described in any item methods of the claims 1 to 6 executed when the computer program is run by processor.
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| CN113238132A (en) * | 2021-04-27 | 2021-08-10 | 平顶山学院 | Detection device and detection method of frequency domain dielectric spectrum tester |
| CN113447537A (en) * | 2021-06-25 | 2021-09-28 | 海南电网有限责任公司电力科学研究院 | Oiled paper insulation frequency domain dielectric spectrum measuring method and device, storage medium and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113238132A (en) * | 2021-04-27 | 2021-08-10 | 平顶山学院 | Detection device and detection method of frequency domain dielectric spectrum tester |
| CN113238132B (en) * | 2021-04-27 | 2024-05-03 | 平顶山学院 | Detection device and detection method of frequency domain dielectric spectrum tester |
| CN113447537A (en) * | 2021-06-25 | 2021-09-28 | 海南电网有限责任公司电力科学研究院 | Oiled paper insulation frequency domain dielectric spectrum measuring method and device, storage medium and terminal |
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