CN110208619A - Wind power plant super capacitor life estimation method for variable pitch and its system and Wind turbines - Google Patents
Wind power plant super capacitor life estimation method for variable pitch and its system and Wind turbines Download PDFInfo
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- CN110208619A CN110208619A CN201910483087.5A CN201910483087A CN110208619A CN 110208619 A CN110208619 A CN 110208619A CN 201910483087 A CN201910483087 A CN 201910483087A CN 110208619 A CN110208619 A CN 110208619A
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of wind power plant super capacitor life estimation method for variable pitch and its system and Wind turbines, belong to Wind turbines field, comprising: acquisition wind power plant unit capacitor box charging voltage value U first and annual temperature data value Tt, and count the actual motion duration t of each temperature moment T super capacitoractual,T；Service life conversion mode, by the actual motion duration t of temperature moment T super capacitor each in 1 yearactual, T is scaled certain specific temperature TspecificThe conversion operation duration t of lower super capacitorspecific, T sums, and the estimated life L of super capacitor is calculated.Super capacitor life estimation method of the invention considers each wind power plant in the whole nation and is located in the influence of the difference and each unit actual use situation difference of environment to super capacitor service life.This plays important directive function to each unit super capacitor periodic maintenance of wind power plant and replacement.
Description
Technical field
The present invention relates to Wind turbines fields, more particularly to a kind of wind power plant super capacitor life estimation method for variable pitch
And its system and Wind turbines.
Background technique
Super capacitor is because having many advantages, such as that charging rate is fast, service life cycle is long, discharge capability is strong, in recent years gradually
It puts into wind power plant and is used for Wind turbines variable pitch backup power supply.Influence super capacitor service life principal element be charging voltage and
Use environment temperature, it is contemplated that China is vast in territory, and each district environmental difference is big, and each set pitch control cabinet charging system is super
The factors such as different, the circuit aging difference of charging design of capacitance-age lead to charging voltage value, and there are certain deviations, therefore can not
Formulate a unified super capacitor service life year limit value for variable pitch.NB/T 31149-2018 " wind generating set pitch control system
System supercapacitor technologies specification " replacement cycle for not yet providing super capacitor, therefore in actual use when super electricity
Appearance just takes replacement measure when being unable to satisfy feathering requirement, this is easy to cause the safety accident of burst.How according to each wind power plant
The practical operation situation of each unit calculates the estimated life value of super capacitor, plays to the periodic maintenance and replacement of super capacitor
Highly important reference role.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind can calculate super capacitor estimated life value, can be right
The periodic maintenance and replacement of super capacitor play the wind power plant super capacitor life estimation method for variable pitch of directive function and its are
System and Wind turbines.
In order to solve the above technical problems, technical solution provided by the invention is as follows:
On the one hand, the present invention provides a kind of wind power plant super capacitor life estimation method for variable pitch, includes the following steps:
1) acquisition wind power plant unit capacitor box charging voltage value U first and annual temperature data value Tt, and count each
The actual motion duration t of a temperature moment T super capacitoractual,T；The temperature moment T refers to institute under same temperature data value
Corresponding time set, i.e., the actual motion duration t of a certain temperature moment Tactual, T is corresponding under same temperature data value
The sum of institute's having time duration.
2) each super electricity of temperature moment T under capacitor box constant charge voltage value is calculated followed by Formula of the life expectancy
The estimation service life L of appearanceestimate, T:
In formula (1), U, T respectively indicate the charging voltage value and temperature value of variable pitch capacitor box；MSL(Ux,Tx) indicate that voltage is
UxTemperature is TxWhen super capacitor estimated life, due to same variable pitch capacitor box charging voltage value UxIt immobilizes, super capacitor
Estimated life is only related with in-cabinet temperature variation, therefore can simplify and be expressed as Lestimate,T；MSL(U0,T0) expression voltage be U0Temperature
Degree is T0When super capacitor estimated life；N is the power law index of voltage；EaFor the activation energy of typical electrochemical capacitor；K is
Boltzmann constant；M is the gain of the cross-coupling factor；α is voltage factor power law index；β is temperature factor power coefficient.
3) service life conversion mode, by the actual motion duration t of temperature moment T super capacitor each in 1 yearactual, T changes
Calculating is certain specific temperature TspecificThe conversion operation duration t of lower super capacitorspecific, T, wherein conversion operation duration
tspecific, T is equal to actual motion duration tactual, T and service life conversion coefficient curve KTProduct；
4) by the conversion operation duration t of super capacitor in 1 yearspecific, T summation, summing value ∑ tspecific,T, will sum
It is worth ∑ tspecific,TDivided by specific temperature TspecificWhen estimation service life, obtain the estimation of the set pitch control super capacitor
Service life L.
Further, in the step 3), the service life conversion mode are as follows: obtain service life conversion coefficient curve KT: it will surpass
Grade capacitor is in certain specific temperature TspecificUnder estimation service life divided by each temperature moment T estimation service life
Lestimate, T obtains service life conversion coefficient curve KT；Then in conjunction with service life conversion coefficient curve KTIt is calculated: when conversion operation
Long tspecific, T is equal to actual motion duration tactual, T and service life conversion coefficient curve KTProduct.
Further, annual temperature data value is whole year 10min temperature data value, and as in one-year age, system is every
It runs 10min and acquires a variable pitch capacitor box temperature value.Since capacitor box temperature is substantially unchanged in the short time, therefore can be defaulted as
The temperature of system maintains the temperature value of the acquisition always in 10min.
Further, the temperature data value TtRange should be in 0~TmaxBetween, after 0 DEG C normally starts work for unit
The minimum temperature value of variable pitch capacitor box, TmaxValue is depending on local ambient temperature value.
For three blade wind power generator groups, there are three variable pitch cabinets, the super capacitor longevity of above-mentioned evaluation method estimation
Life L is suitable for providing that variable pitch capacitor box of temperature, voltage data for calculating.
In view of within the scope of the different time limits, influence of the environment temperature difference to variable pitch capacitor box temperature is different, and
The aging of variable pitch cabinet charging circuit, super capacitor degree of aging difference make charging voltage value, and there are certain deviations.Therefore to meet one
Fixed safety margin, need to acquire the charging voltage value for closing on several years variable pitch capacitor box and annual temperature value carries out super capacitor respectively
Life estimate, final estimated life value select estimated value it is the smallest that.
On the other hand, a kind of wind power plant super capacitor life evaluation system for variable pitch, including control system, the control are provided
System processed includes memory, processor and is stored in the computer journey that can be run on the memory and on the processor
Sequence, the processor realize the wind power plant super capacitor life estimation method for variable pitch when executing the computer program
Step.
In another aspect, a kind of Wind turbines are provided, including the wind power plant super capacitor life evaluation system for variable pitch.
By adopting such a design, the present invention has at least the following advantages:
Super capacitor life estimation method of the invention considers the difference that each wind power plant in the whole nation is located in environment, and each
Platform unit actually uses influence of the situation difference to super capacitor service life.This is regular to each unit super capacitor of wind power plant
Maintenance plays important directive function with replacement.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is of the invention for the corresponding super capacitor theory service life of each temperature moment T difference charging voltage value U
One embodiment；
Fig. 2 is Wind turbines super capacitor life estimate flow diagram for variable pitch of the invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
Communicate completely to those skilled in the art.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless otherwise will not be explained in an idealized or overly formal meaning by specific definitions.
The present invention provides a kind of embodiment of wind power plant super capacitor life estimation method for variable pitch, as shown in Fig. 2, including
Following steps:
1) acquisition wind power plant unit capacitor box charging voltage value U and whole year 10min temperature data value T firstt, and count
The actual motion duration t of each temperature moment T super capacitor outactual,T；
Wherein, annual 10min temperature data value is in one-year age, and the every operation 10min of system acquires a variable pitch electricity
Hold cabinet temperature value.The temperature data value TtRange should be in 0~TmaxBetween, 0 DEG C is that unit normally starts variable pitch electricity after work
Hold the minimum temperature value of cabinet, TmaxValue is depending on local ambient temperature value.
2) each super electricity of temperature moment T under capacitor box constant charge voltage value is calculated followed by Formula of the life expectancy
The estimation service life L of appearanceestimate, T:
In formula (1), U, T respectively indicate the charging voltage value and temperature value of variable pitch capacitor box；MSL(Ux,Tx) indicate that voltage is
UxTemperature is TxWhen super capacitor estimated life；MSL(U0,T0) expression voltage be U0Temperature is T0When super capacitor estimate the longevity
Life；N=0.6, Ea=0.3eV, K=862e-5Ev/K, m=0.023, α=16, β=17, each temperature moment T difference charging
The corresponding super capacitor theory service life of voltage value U is shown in Fig. 1.
3) by super capacitor in certain specific temperature TspecificUnder estimation service life divided by each temperature moment T estimation
Service life Lestimate, T obtains service life conversion coefficient curve KT；
4) service life conversion coefficient K is combinedT, by the actual motion duration t of temperature moment T super capacitor each in 1 yearactual,T
It is scaled certain specific temperature TspecificThe conversion operation duration t of lower super capacitorspecific, T, wherein conversion operation duration
tspecific, T is equal to actual motion duration tactual, T and service life conversion coefficient curve KTProduct；
5) by the conversion operation duration t of super capacitor in 1 yearspecific, T summation, summing value ∑ tSpecific, TIt is as super
In the suitable Mr. Yu's specific temperature T of practical total operation duration of each temperature moment T in capacitor 1 yearspecificTotal operation duration down,
By summing value ∑ tspecific, T is divided by specific temperature TspecificWhen estimation service life, obtain the set pitch control with super electricity
The estimated life L of appearance.
The temperature moment T refers to time set corresponding under same temperature data value, i.e., the reality of a certain temperature moment T
Border operation duration tactual, T is the sum of institute's having time duration corresponding under same temperature data value, for example, acquisition 10min
Portion temperature value is as shown in table 1, in the temperature that the time point of 12:00,12:20,12:30,12:50,13:00,13:20 etc. acquire
Data value is 10 DEG C, therefore when 12:00,12:20,12:30,12:50,13:00,13:20 equi-time point are 10 DEG C of temperature
It carves.
Table 1: the portion temperature data value of 10min is acquired
| Time point | … | 12:00 | 12:10 | 12:20 | 12:30 | 12:40 | 12:50 | 13:00 | 13:10 | 13:20 | … |
| Temperature collection | … | 10℃ | 12℃ | 10℃ | 10℃ | 9℃ | 10℃ | 10℃ | 11℃ | 10℃ | … |
Further, the estimation of the super capacitor service life L is suitable for providing temperature, that voltage data is used to calculate
Variable pitch capacitor box.
Further, estimated life value further include: acquisition closes on charging voltage value and the whole year of several years variable pitch capacitor box
Temperature value carries out the life estimate of super capacitor respectively, final estimated life value select estimated value it is the smallest that.
On the other hand, a kind of wind power plant super capacitor life evaluation system for variable pitch, including control system, the control are provided
System processed includes memory, processor and is stored in the computer journey that can be run on the memory and on the processor
Sequence, the processor realize the wind power plant super capacitor life estimation method for variable pitch when executing the computer program
Step.
In another aspect, a kind of Wind turbines are provided, including the wind power plant super capacitor life evaluation system for variable pitch.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (9)
1. a kind of wind power plant super capacitor life estimation method for variable pitch, which comprises the steps of:
1) acquisition wind power plant unit capacitor box charging voltage value U first and annual temperature data value Tt, and count each temperature
The actual motion duration t of moment T super capacitoractual,T；
2) each temperature moment T super capacitor under capacitor box constant charge voltage value is calculated followed by Formula of the life expectancy
Estimate service life Lestimate,T；
3) service life conversion mode, by the actual motion duration t of temperature moment T super capacitor each in 1 yearactual, T is scaled
Certain specific temperature TspecificThe conversion operation duration t of lower super capacitorspecific,T；
4) by the conversion operation duration t of super capacitor in 1 yearspecific, T summation, summing value ∑ tspecific,T, by summing value ∑
tspecific,TDivided by specific temperature TspecificWhen estimation service life, obtain the estimated life of the set pitch control super capacitor
L。
2. wind power plant super capacitor life estimation method for variable pitch according to claim 1, which is characterized in that the step
2) in, Formula of the life expectancy are as follows:
In formula (1), U, T respectively indicate the charging voltage value and temperature value of variable pitch capacitor box；MSL(Ux,Tx) expression voltage be UxTemperature
Degree is TxWhen super capacitor estimated life；MSL(U0,T0) expression voltage be U0Temperature is T0When super capacitor estimated life；n
For the power law index of voltage；EaFor the activation energy of typical electrochemical capacitor；K is Boltzmann constant；M is the cross-coupling factor
Gain；α is voltage factor power law index；β is temperature factor power coefficient.
3. wind power plant super capacitor life estimation method for variable pitch according to claim 1 or 2, which is characterized in that described
In step 3), the service life conversion mode are as follows: obtain service life conversion coefficient curve KT: by super capacitor in certain specific temperature
TspecificUnder estimation service life divided by each temperature moment T estimation service life Lestimate, T obtain the service life conversion system
Number curve KT；Then in conjunction with service life conversion coefficient curve KTIt is calculated: conversion operation duration tspecific, T is equal to actual motion
Duration tactual, T and service life conversion coefficient curve KTProduct.
4. wind power plant super capacitor life estimation method for variable pitch according to any one of claims 1 to 4, which is characterized in that
In the step 1), annual temperature data value TtFor in one-year age, the every operation 10min of system acquires a variable pitch capacitor box
Temperature value.
5. wind power plant super capacitor life estimation method for variable pitch according to claim 4, which is characterized in that the temperature
The range of data value T should be in 0~TmaxBetween, 0 DEG C normally starts the minimum temperature value of variable pitch capacitor box after work, T for unitmax
Value is depending on local ambient temperature value.
6. wind power plant super capacitor life estimation method for variable pitch according to any one of claims 1 to 5, which is characterized in that
The estimated life L of the super capacitor is suitable for providing that variable pitch capacitor box of temperature, voltage data for calculating.
7. wind power plant super capacitor life estimation method for variable pitch according to any one of claims 1 to 6, which is characterized in that
Estimated life value further include: acquisition closes on the charging voltage value of several years variable pitch capacitor box and annual temperature value carry out respectively it is super
The life estimate of capacitor, final estimated life value select estimated value it is the smallest that.
8. a kind of wind power plant super capacitor life evaluation system for variable pitch, which is characterized in that including control system, the control system
System is including memory, processor and is stored in the computer program that can be run on the memory and on the processor, institute
It states and realizes claim 1 to 7 any wind power plant super capacitor longevity for variable pitch when processor executes the computer program
The step of ordering evaluation method.
9. a kind of Wind turbines, which is characterized in that including wind power plant according to any one of claims 8 super capacitor life estimate for variable pitch
System.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110824361A (en) * | 2019-11-20 | 2020-02-21 | 中国船舶重工集团海装风电股份有限公司 | Method, device, equipment and medium for calculating residual life of super capacitor of wind turbine generator |
| CN113864133A (en) * | 2020-06-30 | 2021-12-31 | 北京金风科创风电设备有限公司 | Capacitance characteristic detection method and device of super capacitor and variable pitch system |
| WO2024077521A1 (en) * | 2022-10-12 | 2024-04-18 | 河南许继仪表有限公司 | Method and apparatus for evaluating service life of electricity meter internal capacitor |
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