CN109031116A - The test method and equipment of the no-load loss of synchronous generator - Google Patents
The test method and equipment of the no-load loss of synchronous generator Download PDFInfo
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- CN109031116A CN109031116A CN201810680311.5A CN201810680311A CN109031116A CN 109031116 A CN109031116 A CN 109031116A CN 201810680311 A CN201810680311 A CN 201810680311A CN 109031116 A CN109031116 A CN 109031116A
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- load loss
- revolving speed
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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
- G01R31/34—Testing dynamo-electric machines
Abstract
The present invention provides the test method and equipment of a kind of no-load loss of synchronous generator, comprising: acquires the voltage waveform data of the no-load back electromotive force of synchronous generator；Extract multiple zero passage point moments in voltage waveform data；Revolving speed sequence is determined according to multiple zero passage point moments；No-load loss sequence is determined according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation law；The respective function between the no-load loss of synchronous generator and revolving speed is obtained according to revolving speed sequence and no-load loss sequence fit.In the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, according to the voltage waveform data of the no-load back electromotive force of acquisition, using rigid body fixed-axis rotation law, it can accurately and efficiently determine the respective function between the no-load loss and revolving speed of synchronous generator, accurate data can be provided for the efficiency operation of the synchronous generator.
Description
Technical field
The present invention relates to synchronous generator fields, more particularly, are related to a kind of survey of the no-load loss of synchronous generator
Method for testing and equipment.
Background technique
The no-load loss of synchronous generator refers to when that is operated without power output under rated condition with rated speed institute
The constant loss of consumption mainly includes iron loss, mechanical loss and wind moussing loss.The no-load loss of synchronous generator is general at present
It is determined by way of finite element simulation.And the finite element simulation mode of various losses is many and diverse, boundary condition is not easy to determine, imitates
True result and actual result deviation are larger.It is unable to satisfy the measurement to the no-load loss of synchronous generator.Therefore, existing synchronization
The no-load loss test method accuracy rate of generator is not high.
Summary of the invention
The purpose of the present invention is to provide a kind of test method of the no-load loss of synchronous generator and equipment, existing to solve
The not high problem of the no-load loss test method accuracy rate of some synchronous generators.
An aspect of of the present present invention provides a kind of test method of the no-load loss of synchronous generator, and test method includes: to adopt
Collect the voltage waveform data of the no-load back electromotive force of synchronous generator；Extract multiple zero passage point moments in voltage waveform data；
Revolving speed sequence is determined according to multiple zero passage point moments；It is fixed according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation
It restrains and determines no-load loss sequence；The no-load loss of synchronous generator is obtained according to revolving speed sequence and no-load loss sequence fit and is turned
Respective function between speed.
Optionally, when the step of determining revolving speed sequence according to multiple zero passage point moments includes: by two adjacent zero crossings
Twice of time difference between quarter is determined as the period of the voltage waveform between two adjacent zero passage point moments；According to the period with
And the number of pole-pairs of synchronous generator, when determining synchronous generator time in two adjacent zero passage point moments preceding zero crossing
The revolving speed at quarter；By the revolving speed of all zero passage point moments, arrange to obtain revolving speed sequence with the sequencing of time of origin.
Optionally, no-load loss sequence is determined according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation law
The step of column, comprises determining that two angular speed corresponding to adjacent two revolving speed in revolving speed sequence, and according to multiple zero passages
Point moment determines the time between two angular speed；Determine that angle adds according to the time between two angular speed and two angular speed
Speed；Bonding force square is determined according to angular acceleration and rigid fixed-axis rotation law；According to bonding force square and two angular speed
Middle time preceding angular speed, determination and no-load loss corresponding to time preceding revolving speed in two adjacent revolving speeds；By institute
There is no-load loss corresponding to revolving speed, arranges to obtain no-load loss sequence with the sequencing of time of origin.
Optionally, according to revolving speed sequence and no-load loss sequence fit obtain synchronous generator no-load loss and revolving speed it
Between respective function the step of include: according to revolving speed sequence and no-load loss sequence, be based on least square method, fitting synchronized
Respective function between the no-load loss and revolving speed of generator.
Optionally, according to revolving speed sequence and no-load loss sequence, it is based on least square method, fitting obtains synchronous generator
It include: corresponding function between setting no-load loss and revolving speed the step of corresponding function between no-load loss and revolving speed, wherein
The function of setting includes at least one undetermined constant；It is corresponding with the every speed in revolving speed sequence according to the determination of the function of setting
The estimated value of no-load loss；The reality of no-load loss corresponding with the every speed in revolving speed sequence is determined according to no-load loss sequence
Actual value, wherein the actual value of no-load loss corresponding with any one revolving speed in revolving speed sequence, be no-load loss sequence in
The value of the corresponding no-load loss of any one revolving speed；Between the estimated value and actual value of no-load loss corresponding with every speed
The minimum condition of error sum of squares, determine setting function undetermined constant.
Optionally, further includes: before extracting multiple zero passage point moments in voltage waveform data, to voltage waveform data
Carry out zero phase-shift filtering processing.
Optionally, the step of acquiring the voltage waveform data of the no-load back electromotive force of synchronous generator includes: that control synchronizes
Generator accelerates to rated speed in the unloaded state, after control synchronous generator runs the predetermined time with rated speed,
The driving power for disconnecting synchronous generator starts the voltage waveform data for acquiring the no-load back electromotive force of synchronous generator, until
Synchronous generator is out of service.
An aspect of of the present present invention provides a kind of test equipment of the no-load loss of synchronous generator, comprising: acquisition unit is used
In the voltage waveform data of the no-load back electromotive force of acquisition synchronous generator；Extraction unit, for extracting in voltage waveform data
Multiple zero passage point moments；Revolving speed sequence determination unit, for determining revolving speed sequence, and zero load according to multiple zero passage point moments
Sequence determination unit is lost, it is unloaded for being determined according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation law
Sequence is lost；Fitting unit, for obtaining the no-load loss of synchronous generator according to revolving speed sequence and no-load loss sequence fit
Respective function between revolving speed.
Optionally, revolving speed sequence determination unit is used for twice of the time difference between two adjacent zero passage point moments really
It is set to the period of the voltage waveform between two adjacent zero passage point moments；According to period and the number of pole-pairs of synchronous generator,
Determine the revolving speed of synchronous generator time preceding zero passage point moment in two adjacent zero passage point moments；By all zero crossings
The revolving speed at moment successively obtains revolving speed sequence with time of origin for sequence arrangement.
Optionally, no-load loss sequence determination unit is used to determine corresponding to adjacent two revolving speed in revolving speed sequence
Two angular speed, and determine according to multiple zero passage point moments the time between two angular speed；According to two angular speed and two
Time between a angular speed determines angular acceleration；Bonding force square is determined according to angular acceleration and rigid fixed-axis rotation law；
According to time preceding angular speed in bonding force square and two angular speed, determination is preceding with the time in two adjacent revolving speeds
No-load loss corresponding to revolving speed；By no-load loss corresponding to all revolving speeds, arrange to obtain with the sequencing of time of origin
No-load loss sequence.
Optionally, fitting unit is used to be based on least square method according to revolving speed sequence and no-load loss sequence, and fitting obtains
Respective function between the no-load loss and revolving speed of synchronous generator.
Optionally, fitting unit is for setting corresponding function between no-load loss and revolving speed, wherein the function packet of setting
Include at least one undetermined constant；According to determining the estimating with the corresponding no-load loss of every speed in revolving speed sequence of the function of setting
Evaluation；The actual value of no-load loss corresponding with the every speed in revolving speed sequence is determined according to no-load loss sequence, wherein with
The actual value of the corresponding no-load loss of any one revolving speed in revolving speed sequence, be no-load loss sequence in any one revolving speed
The value of corresponding no-load loss；With the error sum of squares between the estimated value and actual value of no-load loss corresponding with every speed
Minimum condition determines the undetermined constant of the function of setting.
Optionally, further includes: pretreatment unit, for extracting multiple zero crossings in voltage waveform data in extraction unit
Before moment, zero phase-shift filtering processing is carried out to voltage waveform data.
Optionally, acquisition unit accelerates to rated speed for controlling synchronous generator in the unloaded state, same in control
After generator is walked with the rated speed operation predetermined time, the driving power of synchronous generator is disconnected, starts to acquire synchronous generator
The voltage waveform data of the no-load back electromotive force of machine, until synchronous generator is out of service.
A kind of computer readable storage medium is provided according to another aspect of the present invention, which deposits
Contain the test method for the no-load loss for making processor execute synchronous generator as described above when being executed by a processor
Computer program.
A kind of computing device is provided according to another aspect of the present invention, which includes: processor；Memory is used
Work as in storage and is executed by processor so that processor executes the test method of the no-load loss of synchronous generator as described above
Computer program.
In the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, according to acquisition
The voltage waveform data of no-load back electromotive force can accurately and efficiently determine synchronous generator using rigid body fixed-axis rotation law
No-load loss and revolving speed between respective function, accurate data can be provided for the efficiency operation of the synchronous generator.
In addition, in the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, it is right
The original voltage waveform data of acquisition has carried out zero-phase filtering, solves the validity problem of data, avoids the white of data
Influence of the noise to test result；Using Least Square Regression Analysis method, realizes to no-load power data processing, pass through minimum
Change error square mode find the best match functions of data, guarantee that test result more has statistical significance and close to true
Real conclusion more accurately expresses test result, meanwhile, accurate data are provided for the efficiency operation of synchronous generator.
In addition, the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, realize
A kind of measurement of the no-load loss of new synchronous generator, when avoiding in the prior art using the calculating of no-load loss simulation model
The problems such as boundary condition confirmation is more complex, and simulation result deviation is big.Meanwhile the measuring and calculating of the no-load loss of the synchronous generator helps
In the verifying and optimization of realizing synchronous generator loss model.
Part in following description is illustrated into the other aspect and/or advantage of the present invention, some is by retouching
Stating will be apparent, or can learn by implementation of the invention.
Detailed description of the invention
By the detailed description carried out below in conjunction with the accompanying drawings, above and other objects of the present invention, features and advantages will
It becomes more fully apparent, in which:
Fig. 1 is the flow chart for showing the test method of the no-load loss of synchronous generator of embodiment according to the present invention；
Fig. 2 shows the exemplary diagrams of the voltage waveform of embodiment according to the present invention；
Fig. 3 shows the segment voltage waveform that voltage shakes around zero point in the voltage waveform of embodiment according to the present invention
Exemplary diagram；
Fig. 4 shows the flow chart of the method for the determination revolving speed sequence of embodiment according to the present invention；
Fig. 5 shows the flow chart of the method for the determination no-load loss sequence of embodiment according to the present invention；
Fig. 6 is the block diagram for showing the test device of the no-load loss of synchronous generator of embodiment according to the present invention.
Specific embodiment
Detailed description of the present invention embodiment with reference to the accompanying drawings.
Fig. 1 is the flow chart for showing the test method of the no-load loss of synchronous generator of embodiment according to the present invention.
The test method of the no-load loss of embodiment according to the present invention is applied to the synchronous generator of various large rotating inertias, such as forever
Magnetic-synchro generator etc..Magneto alternator is the synchronous generator that synchronous rotary magnetic field is generated by permanent magnet excitation, permanent magnetism
Body generates rotating excitation field as rotor, and threephase stator winding, by armature-reaction, incudes three-phase symmetrical under rotating excitation field effect
Electric current.
Referring to Fig.1, step S10 acquires the voltage waveform data of the no-load back electromotive force of synchronous generator.
No-load back electromotive force is the counter electromotive force that synchronous generator runs generation in the case where zero load.
As an example, the voltage value of the no-load back electromotive force of synchronous generator can be acquired in real time, acquired according to different time
Voltage value obtain the voltage waveform data.
In a preferred embodiment, the respective function between the no-load loss and revolving speed in order to make subsequent determination is more
Accurately, it needs to obtain more comprehensive data, the revolving speed that can obtain synchronous generator is decreased to during zero from rated speed
No-load back electromotive force voltage waveform data.
As an example, in step slo, can first control synchronous generator and accelerate to rated speed in the unloaded state,
After synchronous generator is controlled with the rated speed operation predetermined time, the driving power of synchronous generator is disconnected, it is same to start acquisition
The voltage waveform data for walking the no-load back electromotive force of generator, until synchronous generator is out of service.
As an example, the driving power of synchronous generator can be provided by frequency converter, it can be by controlling frequency converter
Rated speed is accelerated in the unloaded state to control synchronous generator, and driving electricity can be disconnected by disconnecting frequency converter
Source.
Can by it is various can collection voltages device come collection voltages Wave data, for example, power analyzer etc..Acquisition electricity
Corrugating data device needs meet some requirements, for example, sample rate be greater than 50kHz, voltage measurement range be 0~
2000V, precision are at least 0.1V.
Fig. 2 shows the exemplary diagrams of the voltage waveform of embodiment according to the present invention.As shown in Fig. 2, since sampler is deposited
White noise and voltage waveform itself the reason of, stringent zero crossing may be not present in the voltage waveform data of acquisition
(multiple concussion has occurred around zero point i.e. in partially very short time interval), causes data result that can not analyze.Fig. 3 is shown
Example of the voltage around the segment voltage waveform of zero point concussion in the voltage waveform of embodiment according to the present invention.As shown in figure 3,
(multiple concussion has occurred around zero point in such as 0.941S to 0.949S) to voltage waveform in very short time interval.
In a preferred embodiment, execute extract voltage waveform data in multiple zero passage point moments the step of it
Before, zero phase-shift filtering processing is carried out to voltage waveform data, to realize to voltage waveform data in the smooth of dead-center position, is guaranteed
The validity of voltage waveform data.
Particularly, first by the input signal sequence of acquisition (i.e. collection voltages device acquire for the first time voltage waveform data)
It is filtered, is filtered again after filter result is inverted, obtained result is as accurate after reversion
The output signal sequence of zero phase distortion (executes institute in the step for extracting multiple zero passage point moments in voltage waveform data
Voltage waveform data).For example, first by input signal sequence [a1,a2…an] reversion obtain [an…a2,a1], then pass through
Filtering processing obtains [bn…b2,b1], then [b is obtained to filter result data reversal1,b2…bn], it again passes by and is filtered
To output signal sequence [c1,c2…cn]。
There are many kinds of processing methods for the treatment process practice of zero-phase filtering, this is a kind of method selected herein.
In step S20, multiple zero passage point moments in voltage waveform data are extracted.
At the time of zero passage point moment is corresponding to voltage over zero in voltage waveform data.
In step S30, revolving speed sequence is determined according to multiple zero passage point moments.
Revolving speed sequence be by synchronous generator multiple zero passage point moments revolving speed, with time of origin sequencing arrangement group
At sequence.
The detailed process of step S30 is described in detail hereinafter with reference to Fig. 4.
Fig. 4 shows the flow chart of the method for the determination revolving speed sequence of embodiment according to the present invention.
As shown in figure 4, being determined as this for twice of the time difference between two adjacent zero passage point moments in step S301
The period of voltage waveform between two adjacent zero passage point moments.
As an example, the period of the voltage waveform between two adjacent zero passage point moments can be according to following formula (1) come really
It is fixed.
Ti=2* (ti+1-ti) (i=1,2 ..., m-1) (1)
Wherein, m indicates the quantity of zero passage point moment, ti+1And tiIndicate two adjacent zero passage point moments, TiIndicate ti+1With
tiBetween voltage waveform period.
Synchronous generator is obtained at adjacent two according to period and the number of pole-pairs of synchronous generator in step S302
The revolving speed of time preceding zero passage point moment in zero passage point moment.
As an example, synchronous generator can be determined in the revolving speed of each zero passage point moment according to following formula (2).
ni=60*fi/ g (i=1,2 ..., m-1) (2)
Wherein, niIndicate synchronous generator in zero passage point moment tiRevolving speed, g indicate synchronous generator number of pole-pairs, m table
Show the quantity of zero passage point moment, fiIndicate two adjacent zero passage point moment ti+1And tiBetween voltage waveform frequency, fi=
1/Ti。
In step S303, the revolving speed of all zero passage point moments arranges to obtain revolving speed sequence with the sequencing of time of origin
Column.
Referring again to Fig. 1, in step S40, according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation law
Determine no-load loss sequence.
No-load loss sequence be by no-load loss corresponding with each revolving speed in revolving speed sequence, it is successively suitable with time of origin
The sequence that sequence rearranges.
Rigid body fixed-axis rotation law, which refers to, is equal to rigid body pair for the bonding force square of a certain fixed bias circuit suffered by rigid body
The product of the rotary inertia and rigid body of the fixed bias circuit angular acceleration obtained under the effect of this bonding force square.
The detailed process of step S40 is described in detail hereinafter with reference to Fig. 5.
Fig. 5 shows the flow chart of the method for the determination no-load loss sequence of embodiment according to the present invention.
As shown in figure 5, determining two angle speed corresponding to adjacent two revolving speed in revolving speed sequence in step S401
It spends, and determines the time between two angular speed according to multiple zero passage point moments.
As an example, angular speed corresponding with revolving speed can be determined according to following formula (3).
ωi=2* π * ni/ 60 (i=1,2 ..., m-1) (3)
Wherein, ωiIt indicates and revolving speed niCorresponding angular speed, m indicate the quantity of zero passage point moment.
Two angular velocity omegasiAnd ωi+1Between time be Ti+1/ 2, wherein Ti+1It can be by the way that the i in formula (1) be replaced
It is determined for i+1.
In step S402, determine that angle accelerates according to the time between above-mentioned two angular speed and above-mentioned two angular speed
Degree.
As an example, above-mentioned angular acceleration can be determined according to following formula (4).
αi=2* (ωi-ωi+1)/Ti+1(i=1,2 ..., m-2) (4)
Wherein, αiIndicate two angular velocity omegasiAnd ωi+1Between angular acceleration, m indicate zero passage point moment quantity.
In step S403, bonding force square is determined according to above-mentioned angular acceleration and rigid fixed-axis rotation law.
As an example, above-mentioned bonding force square can be determined according to following formula (5).
Mi=J* αi(i=1,2 ..., m-2) (5)
Wherein, MiIndicate that bonding force square, J indicate the rotary inertia of synchronous generator, αiIndicate two angular velocity omegasiWith
ωi+1Between angular acceleration, m indicate zero passage point moment quantity.
Rotary inertia indicates that rotary body generates the physical characteristic constant of angular acceleration under torque, unrelated with revolving speed,
Rotary body for shaft rotary inertia be equal to it each quality infinitesimal to shaft radius square product summation.
It is determined in step S404 according to time preceding angular speed in above-mentioned bonding force square and above-mentioned two angular speed
With no-load loss corresponding to time preceding revolving speed in above-mentioned two adjacent revolving speeds.
As an example, above-mentioned bonding force square can be determined according to following formula (6).
pi=Mi*ωi/ 1000 (i=1,2 ..., m-2) (6)
Wherein, piIt indicates and revolving speed niCorresponding no-load loss, m indicate the quantity of zero passage point moment.
It is appreciated that the unit of parameters of the above-mentioned formula (1) into formula (6) is all made of the International System of Units.
No-load loss corresponding to all revolving speeds is arranged to obtain sky with the sequencing of time of origin in step S405
Load-loss sequence.
Referring again to Fig. 1, in step S50, synchronous generator is obtained according to revolving speed sequence and no-load loss sequence fit
Respective function between no-load loss and revolving speed.
Here, various approximating methods can be used to obtain the corresponding letter between the no-load loss of synchronous generator and revolving speed
Number.
In a preferred embodiment, more accurate fitting result in order to obtain, can be according to revolving speed sequence and zero load
Sequence is lost, is based on least square method, fitting obtains the respective function between the no-load loss of synchronous generator and revolving speed.
As an example, specific fit procedure is as follows.
Set corresponding function between no-load loss and revolving speed.The function of setting includes at least one undetermined constant.
As an example, the function of setting can be quadratic function.
For example, the function set is following formula (7).
F (n)=a*n2+b*n+c (7)
Wherein, f (n) indicates no-load loss, and n indicates that revolving speed, a, b and c indicate undetermined constant.
Estimated value f (the n of no-load loss corresponding with the every speed in revolving speed sequence is determined according to the function of settingi),
Wherein, i=1,2 ..., m-2。
The actual value of no-load loss corresponding with the every speed in revolving speed sequence is determined according to above-mentioned no-load loss sequence
pi, wherein (i=1,2 ..., m-2).The actual value of the corresponding no-load loss of any one revolving speed in revolving speed sequence, for unloaded damage
Consume the value of no-load loss corresponding with any one revolving speed in sequence.
With the minimum condition of error sum of squares between the estimated value and actual value of no-load loss corresponding with every speed,
Determine undetermined constant a, b and c of the function of setting, undetermined constant a, b and c, which are updated in the quadratic function of setting, can be obtained
Respective function between the no-load loss and revolving speed of synchronous generator.
Fig. 6 is the block diagram for showing the test device of the no-load loss of synchronous generator of embodiment according to the present invention.Root
It is applied to the synchronous generator of various large rotating inertias, such as permanent magnetism according to the test device of the no-load loss of the embodiment of the present invention
Synchronous generator etc..
The test device of the no-load loss of the synchronous generator of embodiment according to the present invention includes acquisition unit 10, extracts
Unit 20, revolving speed sequence determination unit 30, no-load loss sequence determination unit 40 and fitting unit 50.
Acquisition unit 10 acquires the voltage waveform data of the no-load back electromotive force of synchronous generator.
No-load back electromotive force is the counter electromotive force that synchronous generator runs generation in the case where zero load.
As an example, the voltage value of the no-load back electromotive force of synchronous generator can be acquired in real time, acquired according to different time
Voltage value obtain the voltage waveform data.
In a preferred embodiment, the respective function between the no-load loss and revolving speed in order to make subsequent determination is more
Accurately, it needs to obtain more comprehensive data, the revolving speed that can obtain synchronous generator is decreased to during zero from rated speed
No-load back electromotive force voltage waveform data.
As an example, acquisition unit 10 can first control synchronous generator accelerates to rated speed in the unloaded state, controlling
After synchronous generator processed runs the predetermined time with rated speed, the driving power of synchronous generator is disconnected, starts acquisition and synchronizes
The voltage waveform data of the no-load back electromotive force of generator, until synchronous generator is out of service.
As an example, the driving power of synchronous generator can be provided by frequency converter, it can be by controlling frequency converter
Rated speed is accelerated in the unloaded state to control synchronous generator, and driving electricity can be disconnected by disconnecting frequency converter
Source.
Can by it is various can collection voltages device come collection voltages Wave data, for example, power analyzer etc..Acquisition electricity
Corrugating data device needs meet some requirements, for example, sample rate be greater than 50kHz, voltage measurement range be 0~
2000V, precision are at least 0.1V.
In a preferred embodiment, existing for the sampler due to white noise and voltage waveform itself,
Stringent zero crossing may be not present in the voltage waveform data of acquisition and (surround zero point i.e. in partially very short time interval
Multiple concussion has occurred), cause data result that can not analyze, the no-load loss of the synchronous generator of embodiment according to the present invention
Test device further include pretreatment unit (not shown).Pretreatment unit is used to extract voltage waveform in extraction unit 20
Before multiple zero passage point moments in data, zero phase-shift filtering processing is carried out to voltage waveform data, to realize to voltage waveform
Data guarantee the validity of voltage waveform data in the smooth of dead-center position.
Particularly, first by the laggard of input signal sequence (i.e. acquisition unit acquire for the first time voltage waveform data) reversion
Row filtering processing, is filtered again after filter result is reversed, and obtained result is accurate zero phase distortion
Output signal sequence (i.e. voltage waveform data used in extraction unit).
Extraction unit 20 extracts multiple zero passage point moments in voltage waveform data.
At the time of zero passage point moment is corresponding to voltage over zero in voltage waveform data.
Revolving speed sequence determination unit 30 determines revolving speed sequence according to multiple zero passage point moments.
Revolving speed sequence be by synchronous generator multiple zero passage point moments revolving speed, with time of origin sequencing arrangement group
At sequence.
As an example, revolving speed sequence determination unit 30 is true by twice of the time difference between two adjacent zero passage point moments
It is set to the period of the voltage waveform between two adjacent zero passage point moments.
As an example, the period of the voltage waveform between two adjacent zero passage point moments can be according to above-mentioned formula (1) come really
It is fixed.
Revolving speed sequence determination unit 30 obtains synchronous generator adjacent according to period and the number of pole-pairs of synchronous generator
Two zero passage point moments in time preceding zero passage point moment revolving speed.
As an example, synchronous generator can be determined in the revolving speed of each zero passage point moment according to above-mentioned formula (2).
The revolving speed of all zero passage point moments is arranged to obtain by revolving speed sequence determination unit 30 with the sequencing of time of origin
Revolving speed sequence.
No-load loss sequence determination unit 40 is according to multiple zero passage point moments, revolving speed sequence and rigid fixed-axis rotation law
Determine no-load loss sequence.
No-load loss sequence be by no-load loss corresponding with each revolving speed in revolving speed sequence, it is successively suitable with time of origin
The sequence that sequence rearranges.
Rigid body fixed-axis rotation law, which refers to, is equal to rigid body pair for the bonding force square of a certain fixed bias circuit suffered by rigid body
The product of the rotary inertia and rigid body of the fixed bias circuit angular acceleration obtained under the effect of this bonding force square.
As an example, no-load loss sequence determination unit 40 determines corresponding to adjacent two revolving speed in revolving speed sequence
Two angular speed, and determine according to multiple zero passage point moments the time between two angular speed.
As an example, angular speed corresponding with revolving speed can be determined according to above-mentioned formula (3).
No-load loss sequence determination unit 40 is according to the time between above-mentioned two angular speed and above-mentioned two angular speed
Determine angular acceleration.
As an example, above-mentioned angular acceleration can be determined according to above-mentioned formula (4).
No-load loss sequence determination unit 40 determines bonding force according to above-mentioned angular acceleration and rigid fixed-axis rotation law
Square.
As an example, above-mentioned bonding force square can be determined according to above-mentioned formula (5).
Rotary inertia indicates that rotary body generates the physical characteristic constant of angular acceleration under torque, unrelated with revolving speed,
Rotary body for shaft rotary inertia be equal to it each quality infinitesimal to shaft radius square product summation.
No-load loss sequence determination unit 40 is preceding according to the time in above-mentioned bonding force square and above-mentioned two angular speed
Angular speed, determination and no-load loss corresponding to time preceding revolving speed in above-mentioned two adjacent revolving speeds.
As an example, above-mentioned bonding force square can be determined according to above-mentioned (6).
No-load loss sequence determination unit 40 is by no-load loss corresponding to all revolving speeds, with the sequencing of time of origin
Arrangement obtains no-load loss sequence.
Fitting unit 50 obtains the no-load loss of synchronous generator according to revolving speed sequence and no-load loss sequence fit and turns
Respective function between speed.
Here, various approximating methods can be used to obtain the corresponding letter between the no-load loss of synchronous generator and revolving speed
Number.
In a preferred embodiment, more accurate fitting result, fitting unit 50 can be according to revolving speeds in order to obtain
Sequence and no-load loss sequence, are based on least square method, and fitting obtains pair between the no-load loss of synchronous generator and revolving speed
Answer function.
As an example, specific fit procedure is as follows.
Set corresponding function between no-load loss and revolving speed.The function of setting includes at least one undetermined constant.
As an example, the function of setting can be quadratic function.
For example, the function set is above-mentioned formula (7).
The estimated value of no-load loss corresponding with the every speed in revolving speed sequence is determined according to the function of setting.
The actual value of no-load loss corresponding with the every speed in revolving speed sequence is determined according to above-mentioned no-load loss sequence.
The actual value of the corresponding no-load loss of any one revolving speed in revolving speed sequence, be no-load loss sequence in any one revolving speed
The value of corresponding no-load loss.
With the minimum condition of error sum of squares between the estimated value and actual value of no-load loss corresponding with every speed,
Determine the undetermined constant of the function of setting, undetermined constant, which is updated in the quadratic function of setting, can be obtained synchronous generator
Respective function between no-load loss and revolving speed.
In the determination method and apparatus of the no-load loss of the synchronous generator of embodiment according to the present invention, according to acquisition
The voltage waveform data of no-load back electromotive force can accurately and efficiently determine synchronous generator using rigid body fixed-axis rotation law
No-load loss and revolving speed between respective function, accurate data can be provided for the efficiency operation of the synchronous generator.
In addition, in the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, it is right
The original voltage waveform data of acquisition has carried out zero-phase filtering, solves the validity problem of data, avoids the white of data
Influence of the noise to test result；Using Least Square Regression Analysis method, realizes to no-load power data processing, pass through minimum
Change error square mode find the best match functions of data, guarantee that test result more has statistical significance and close to true
Real conclusion more accurately expresses test result, meanwhile, accurate data are provided for the efficiency operation of synchronous generator.
In addition, the test method and equipment of the no-load loss of the synchronous generator of embodiment according to the present invention, realize
A kind of measurement of the no-load loss of new synchronous generator, when avoiding in the prior art using the calculating of no-load loss simulation model
The problems such as boundary condition confirmation is more complex, and simulation result deviation is big.Meanwhile the measuring and calculating of the no-load loss of the synchronous generator helps
In the verifying and optimization of realizing synchronous generator loss model.
Embodiment according to the present invention also provides a kind of computer readable storage medium.The computer readable storage medium is deposited
Contain the test method for the no-load loss for making processor execute synchronous generator as described above when being executed by a processor
Computer program.
Embodiment according to the present invention also provides a kind of computing device.The computing device includes processor and memory.It deposits
Reservoir is for storing program instruction.Program instruction is executed by processor so that processor executes synchronous generator as described above
The computer program of the test method of no-load loss.
In addition, each program mould in the test device of the no-load loss of the synchronous generator of embodiment according to the present invention
Block can be realized by hardware completely, such as field programmable gate array or specific integrated circuit；It can also be by hardware and software phase
In conjunction with mode realize；It can also be realized completely by computer program with software mode.
Although being particularly shown and describing the present invention, those skilled in the art referring to its exemplary embodiment
It should be understood that in the case where not departing from the spirit and scope of the present invention defined by claim form can be carried out to it
With the various changes in details.
Claims (16)
1. a kind of test method of the no-load loss of synchronous generator characterized by comprising
Acquire the voltage waveform data of the no-load back electromotive force of the synchronous generator；
Extract multiple zero passage point moments in the voltage waveform data；
Revolving speed sequence is determined according to the multiple zero passage point moment；
No-load loss sequence is determined according to the multiple zero passage point moment, the revolving speed sequence and rigid fixed-axis rotation law；
The no-load loss and revolving speed of the synchronous generator are obtained according to the revolving speed sequence and the no-load loss sequence fit
Between respective function.
2. the test method of the no-load loss of synchronous generator according to claim 1, which is characterized in that according to described more
The step of a zero passage point moment determines revolving speed sequence include:
To be determined as twice of time difference between two adjacent zero passage point moments two adjacent zero passage point moments it
Between voltage waveform period；
According to the period and the number of pole-pairs of the synchronous generator, determine the synchronous generator at described adjacent two
The revolving speed of time preceding zero passage point moment in zero passage point moment；
By the revolving speed of all zero passage point moments, arrange to obtain the revolving speed sequence with the sequencing of time of origin.
3. the test method of the no-load loss of synchronous generator according to claim 2, which is characterized in that according to described more
The step of a zero passage point moment, the revolving speed sequence and rigid fixed-axis rotation law determine no-load loss sequence include:
Determine two angular speed corresponding to adjacent two revolving speed in the revolving speed sequence, and according to the multiple zero crossing
Moment determines the time between described two angular speed；
Angular acceleration is determined according to the time between described two angular speed and described two angular speed；
Bonding force square is determined according to the angular acceleration and the rigid fixed-axis rotation law；
According to time preceding angular speed in the bonding force square and described two angular speed, it is determining with described adjacent two
No-load loss corresponding to time preceding revolving speed in revolving speed；
By no-load loss corresponding to all revolving speeds, arrange to obtain the no-load loss sequence with the sequencing of time of origin.
4. the test method of the no-load loss of synchronous generator according to claim 1, which is characterized in that according to described turn
Fast sequence and the no-load loss sequence fit obtain the respective function between the no-load loss and revolving speed of the synchronous generator
The step of include:
According to the revolving speed sequence and the no-load loss sequence, it is based on least square method, fitting obtains the synchronous generator
No-load loss and revolving speed between respective function.
5. the test method of the no-load loss of synchronous generator according to claim 4, which is characterized in that according to described turn
Fast sequence and the no-load loss sequence, are based on least square method, and fitting obtains the no-load loss of the synchronous generator and turns
Include: the step of corresponding function between speed
Set corresponding function between no-load loss and revolving speed, wherein the function of the setting includes at least one undetermined constant；
The estimated value of no-load loss corresponding with the every speed in the revolving speed sequence is determined according to the function of setting；
The actual value of no-load loss corresponding with the every speed in the revolving speed sequence is determined according to the no-load loss sequence,
Wherein, the actual value of no-load loss corresponding with any one revolving speed in the revolving speed sequence is the no-load loss sequence
In no-load loss corresponding with any one described revolving speed value；
With the minimum condition of error sum of squares between the estimated value and actual value of no-load loss corresponding with every speed, determine
The undetermined constant of the function of the setting.
6. the test method of the no-load loss of synchronous generator according to claim 1, which is characterized in that further include:
Before extracting multiple zero passage point moments in the voltage waveform data, the voltage waveform data is carried out at zero phase-shift filtering
Reason.
7. the test method of the no-load loss of synchronous generator according to claim 1, which is characterized in that the synchronous hair of acquisition
The step of voltage waveform data of the no-load back electromotive force of motor includes:
It controls the synchronous generator and accelerates to rated speed in the unloaded state, controlling the synchronous generator with the volume
After determining the revolving speed operation predetermined time, the driving power of the synchronous generator is disconnected, starts to acquire the synchronous generator
The voltage waveform data of no-load back electromotive force, until the synchronous generator is out of service.
8. a kind of test equipment of the no-load loss of synchronous generator characterized by comprising
Acquisition unit, the voltage waveform data of the no-load back electromotive force for acquiring the synchronous generator；
Extraction unit, for extracting multiple zero passage point moments in the voltage waveform data；
Revolving speed sequence determination unit, for determining revolving speed sequence and no-load loss sequence according to the multiple zero passage point moment
Determination unit, it is unloaded for being determined according to the multiple zero passage point moment, the revolving speed sequence and rigid fixed-axis rotation law
Sequence is lost；
Fitting unit, for obtaining the sky of the synchronous generator according to the revolving speed sequence and the no-load loss sequence fit
Respective function between load-loss and revolving speed.
9. the test equipment of the no-load loss of synchronous generator according to claim 8, which is characterized in that revolving speed sequence is true
Order member is used to be determined as two adjacent zero crossings for twice of the time difference between two adjacent zero passage point moments
The period of voltage waveform between moment；According to the period and the number of pole-pairs of the synchronous generator, the synchronization is determined
The revolving speed of generator time preceding zero passage point moment in two adjacent zero passage point moments；By all zero passage point moments
Revolving speed, with time of origin successively for sequence arrangement obtain the revolving speed sequence.
10. the test equipment of the no-load loss of synchronous generator according to claim 9, which is characterized in that no-load loss
Sequence determination unit is used to determine two angular speed corresponding to adjacent two revolving speed in the revolving speed sequence, and according to institute
It states multiple zero passage point moments and determines time between described two angular speed；According to described two angular speed and described two angles
Time between speed determines angular acceleration；Bonding force is determined according to the angular acceleration and the rigid fixed-axis rotation law
Square；According to time preceding angular speed in the bonding force square and described two angular speed, it is determining with described adjacent two
No-load loss corresponding to time preceding revolving speed in revolving speed；By no-load loss corresponding to all revolving speeds, with time of origin
Sequencing arranges to obtain the no-load loss sequence.
11. the test equipment of the no-load loss of synchronous generator according to claim 8, which is characterized in that fitting unit
For being based on least square method according to the revolving speed sequence and the no-load loss sequence, fitting obtains the synchronous generator
No-load loss and revolving speed between respective function.
12. the test equipment of the no-load loss of synchronous generator according to claim 11, which is characterized in that fitting unit
For setting corresponding function between no-load loss and revolving speed, wherein the function of the setting includes at least one undetermined constant；
The estimated value of no-load loss corresponding with the every speed in the revolving speed sequence is determined according to the function of setting；According to the sky
Load-loss sequence determines the actual value of no-load loss corresponding with the every speed in the revolving speed sequence, wherein with described turn
The actual value of the corresponding no-load loss of any one revolving speed in fast sequence, be the no-load loss sequence in it is described any one
The value of the corresponding no-load loss of a revolving speed；With the error between the estimated value and actual value of no-load loss corresponding with every speed
The minimum condition of quadratic sum, determines the undetermined constant of the function of the setting.
13. the test equipment of the no-load loss of synchronous generator according to claim 8, which is characterized in that further include: it is pre-
Processing unit, for before extraction unit extracts multiple zero passage point moments in the voltage waveform data, to the voltage
Wave data carries out zero phase-shift filtering processing.
14. the test equipment of the no-load loss of synchronous generator according to claim 8, which is characterized in that acquisition unit
Rated speed is accelerated in the unloaded state for controlling the synchronous generator, is controlling the synchronous generator with the volume
After determining the revolving speed operation predetermined time, the driving power of the synchronous generator is disconnected, starts to acquire the synchronous generator
The voltage waveform data of no-load back electromotive force, until the synchronous generator is out of service.
15. a kind of computer readable storage medium is stored with and processor is made to execute such as claim 1 when being executed by a processor
To the computer program of the test method of the no-load loss of synchronous generator described in any one of 7.
16. a kind of computing device, comprising: processor；Memory is executed by processor for storing to work as so that processor executes such as
The computer program of the test method of the no-load loss of synchronous generator described in any one of claim 1 to 7.
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| CN201810680311.5A CN109031116A (en) | 2018-06-27 | 2018-06-27 | The test method and equipment of the no-load loss of synchronous generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633443A (en) * | 2018-12-28 | 2019-04-16 | 华中科技大学 | One kind being suitable for self-excitation Large Synchronous Machine no-load characteristic measurement method |
| CN112146894A (en) * | 2020-09-30 | 2020-12-29 | 重庆长安新能源汽车科技有限公司 | Method for testing and evaluating no-load loss of electric drive assembly based on whole vehicle working condition |
| CN113093008A (en) * | 2021-05-07 | 2021-07-09 | 南京航空航天大学 | High-speed electro-magnetic motor non-torque sensor iron loss experimental measurement method |
-
2018
- 2018-06-27 CN CN201810680311.5A patent/CN109031116A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633443A (en) * | 2018-12-28 | 2019-04-16 | 华中科技大学 | One kind being suitable for self-excitation Large Synchronous Machine no-load characteristic measurement method |
| CN112146894A (en) * | 2020-09-30 | 2020-12-29 | 重庆长安新能源汽车科技有限公司 | Method for testing and evaluating no-load loss of electric drive assembly based on whole vehicle working condition |
| CN112146894B (en) * | 2020-09-30 | 2022-06-21 | 重庆长安新能源汽车科技有限公司 | Method for testing and evaluating no-load loss of electric drive assembly based on whole vehicle working condition |
| CN113093008A (en) * | 2021-05-07 | 2021-07-09 | 南京航空航天大学 | High-speed electro-magnetic motor non-torque sensor iron loss experimental measurement method |
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