CN109458306A - A kind of power characteristic of wind driven generator set test macro based on DSP - Google Patents
A kind of power characteristic of wind driven generator set test macro based on DSP Download PDFInfo
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- CN109458306A CN109458306A CN201811544234.7A CN201811544234A CN109458306A CN 109458306 A CN109458306 A CN 109458306A CN 201811544234 A CN201811544234 A CN 201811544234A CN 109458306 A CN109458306 A CN 109458306A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/83—Testing, e.g. methods, components or tools therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/335—Output power or torque
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention provides a kind of power characteristic of wind driven generator set test macro based on DSP, relates generally to power characteristic of wind driven generator set test analysis field.A kind of power characteristic of wind driven generator set test macro based on DSP, including upper bit processing machine, dsp chip, air velocity transducer, wind transducer, temperature sensor, baroceptor, current sensor and voltage sensor, it is characterized by: Python software built in the upper bit processing machine, the dsp chip is connect with upper bit processing machine with SCI serial communication signal, and the air velocity transducer, wind transducer, temperature sensor, baroceptor, current sensor, voltage sensor are electrically connected with dsp chip.The beneficial effects of the present invention are: the present invention improves the accuracy of testing wind power generation power of the assembling unit characteristic test, keeps equipment more portable, and has a preferable human-computer interaction interface can real-time display and analysis data.
Description
Technical field
The invention mainly relates to power characteristic of wind driven generator set test analysis field, specifically a kind of wind based on DSP
Power generator group power characteristic test macro.
Background technique
The research that China tests power characteristic of wind driven generator set is started late, relatively backward compared to for foreign countries,
But pass through the effort of many years, unified standard, foundation are also gradually formed for power characteristic of wind driven generator set test
IEC61400-12-1 has formulated standard GB/T/18451.2-2012 power characteristic of wind driven generator set test method.Preliminary shape
At power characteristic of wind driven generator set testing standard system, power characteristic of wind driven generator set test, evaluation, certification are improved
Ability, but the common platforms construction such as test assessment technology tested for power characteristic due to industry is started late, it is relevant
Function is still not perfect, and experiment and test facilities are also incomplete, lacks common test power of fan characteristic platform, it is also necessary to external
Some technical supports.
For wind power generating set during design, experiment, operation, the power curve of unit is a very important finger
Mark.For wind power generating set when being delivered for use, production firm can provide unit in standard air density (1.225kg/m3) under
Power curve.But during actual Wind turbines carry out, actual power curve and calibration power curve can exist centainly
Difference.If actual power curve is higher than calibration power curve, Wind turbines are chronically at overload state, will affect its longevity
Life；If actual power curve is lower than calibration power curve, it will cause Wind turbines generated energy to decline, influence wind power plant operation
Benefit.The power characteristic test of Wind turbines can reflect out the various characteristics of unit, and it is designed, the improvement that manufacture and
Directive function is played in optimization.Based on the above reasons, Wind turbines power characteristic test become Wind turbines type approval in must not
The link that can lack.
For the capacity rapid development that the blower in China was installed in recent years, the type and model of wind power generating set are also more next
It is more, the phenomenon that lag so as to cause some power characteristic test product technologies with matched with blower.Normal power at present
Characteristic testing equipment is difficult to meet the power characteristic of wind driven generator set test of IEC61400-12-1 standard requirements, can not be portable
Test analysis is carried out to every wind power generating set power characterization data synchronous acquisition.
It can be seen that the above existing power characteristic of wind driven generator set test macro still have in design some defects and
Deficiency need to be solved further.How a set of high-precision, portable power characteristic of wind driven generator set test macro are created,
As current industry problem to be solved.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of, and the power characteristic of wind driven generator set based on DSP is surveyed
Test system, it improves the accuracy of testing wind power generation power of the assembling unit characteristic test, keeps equipment more portable, and has one
Preferable human-computer interaction interface can real-time display data variation.
The present invention to achieve the above object, is achieved through the following technical solutions:
A kind of power characteristic of wind driven generator set test macro based on DSP, including upper bit processing machine, dsp chip, wind speed
Sensor, wind transducer, temperature sensor, baroceptor, current sensor and voltage sensor, it is characterised in that: institute
Python software built in bit processing machine is stated, the dsp chip is connect with upper bit processing machine with SCI serial communication signal, described
Air velocity transducer, wind transducer, temperature sensor, baroceptor, current sensor, voltage sensor are and dsp chip
Electrical connection.
A kind of power characteristic of wind driven generator set test macro based on DSP, application method are as follows:
S1: the air velocity transducer, wind transducer, temperature sensor, baroceptor, current sensor and voltage pass
Wind speed information, wind direction information, temperature information, pressure information and the wind-force hair for the hub of wind power generator height that sensor will test
Current information, the information of voltage of motor generation are transmitted to dsp chip, and the dsp chip carries out the signal of each sensor passes
Acquisition and pretreatment, and pass data to bit processing machine；
S2: the upper bit processing machine draws measurement power curve, the measurement power curve by output power standardize with
The mean value that output wind speed is standardized in each section acquires:
Calculate atmospheric density average value:
In formula, ρ10minFor the atmospheric density average value that 10min is obtained, T10minThe absolute temperature obtained for 10min is average
Value, B10minFor the air pressure average value that 10min is obtained, R0For the gas constant 287.05J/ (kgK) of dry air；
Normalization output power:
In formula, PnFor standardized output power, P10minFor the power average value that 10min is obtained, ρ0It is airtight for standard null
Degree；
Standardize wind speed:
In formula, VnFor standardized wind speed, V10minTo measure wind speed 10min average value；
The processing formula of wind speed and output power are as follows:
(D), in (E) formula, ViFor the standardized mean wind speed in i-th of section, Vn,i,jIt is standardized for i-th of section array j
Wind speed, PiAverage value after being standardized for i-th of section output power, Pn,i,jFor i-th of section array j output power mark
Average value after standardization, NiFor the number of i-th of section 10min array；
S3: the upper bit processing machine calculates the power train that Wind turbines to be measured are calculated using Wind turbines power characteristic
Number, the formula of power coefficient are as follows:
In formula, Cp,iFor the power coefficient in i-th of section, ViAverage value after being standardized for i-th of section wind speed, PiFor
Average value after i-th of section output power standardization, A sweep away area, ρ for wind wheel0For standard air density；
S4: the upper bit processing machine calculates wind power generating set annual electricity generating capacity, the wind power generating set annual electricity generating capacity
Calculating is to estimate to obtain according to the frequency distribution and measurement power curve data of reference difference wind speed, with the shape of Weibull distribution
Parameter is 2 frequency distribution of the frequency distribution i.e. rayleigh distributed as wind speed:
Using wind speed as the Rayleigh accumulated probability distribution function of parameter are as follows:
In formula, F (V) is the Rayleigh accumulated probability distribution function of wind speed, VAVEFor the annual mean wind speed of hub height；
When hub height annual mean wind speed is respectively 4m/s, 5m/s, 6m/s, 7m/s, 8m/s, 9m/s, 10m/s and 11m/s
When calculate corresponding annual electricity generating capacity:
The formula of annual electricity generating capacity estimation are as follows:
In formula, AEP is 1 year generated energy.NhFor the hourage in 1 year, about 8760 hours；N is section number, Vi
Average value after being standardized for i-th of section wind speed, PiFor the standardized average output power in i-th of section；
Summation Initialize installation are as follows:
Pi-1=0.0kw Vi-1=Vi-0.5m/s (I)
The prior art is compared, the beneficial effects of the present invention are:
The present invention using high-precision and anti-interference it is relatively strong, can real-time acquisition dsp chip and readability, open source easy to maintain
Software Python is main application hardware and software, and power characteristic of wind driven generator set test macro is designed and is realized.
Equipment is more compact easy to carry, and the accuracy of testing wind power generation power of the assembling unit characteristic test can be improved, and makes equipment more just
It takes, and has a preferable human-computer interaction interface can real-time display and analysis data.
Detailed description of the invention
Attached drawing 1 is present system structural schematic diagram；
Attached drawing 2 is power characteristic test interface of the present invention.
Label shown in attached drawing: 1, upper bit processing machine；2, dsp chip；3, air velocity transducer；4, wind transducer；5, warm
Spend sensor；6, baroceptor；7, current sensor；8, voltage sensor.
Specific embodiment
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this field
Technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
As shown in Figs. 1-2, a kind of power characteristic of wind driven generator set test macro based on DSP of the present invention, including
Upper bit processing machine 1, dsp chip 2, air velocity transducer 3, wind transducer 4, temperature sensor 5, baroceptor 6, current sense
Device 7 and voltage sensor 8, Python software built in the upper bit processing machine 1, the dsp chip 2 and upper bit processing machine 1 are with SCI
The connection of serial communication signal, Serial and the tkinter module of the upper bit processing machine python software, one letter of Programming
Single serial communication selection interface is operated for user, the air velocity transducer 3, wind transducer 4, temperature sensor 5, air pressure
Sensor 6 is arranged near hub of wind power generator, the current sensor 7, voltage sensor 8 and wind power generating set
Power transmission line is connected, the air velocity transducer 3, wind transducer 4, temperature sensor 5, baroceptor 6, current sensor 7
It is electrically connected with dsp chip with voltage sensor 8, the dsp chip uses the DSP development board of STM320F28335 chip.This
Device converts analog signals into the circuit design of digital signal based on operational amplifier TLC274 chip, connection
STM320F28335 chip realizes acquisition with pretreated as a result, being converted into the electricity of 0~3V by transmitter to the signal of input
Signal is pressed, the setting to the sample rate of signal is realized with ePWM (enhanced pulse-width signal), while programming realization to sampling
Data pre-processed, 100 times of amplification is carried out to the signal of acquisition, improves the precision acquired to data.
A kind of power characteristic of wind driven generator set test macro based on DSP, application method are as follows:
S1: the air velocity transducer 3, wind transducer 4, temperature sensor 5, baroceptor 6,7 and of current sensor
The wind speed information for the hub of wind power generator height that voltage sensor 8 will test, wind direction information, temperature information, pressure information
Current information, the information of voltage generated with wind-driven generator is transmitted to dsp chip 2, and the dsp chip 2 is by each sensor passes
Signal be acquired and pre-process, and pass data to bit processing machine 1；
S2: the upper bit processing machine 1 draws measurement power curve, the measurement power curve by output power standardize with
The mean value that output wind speed is standardized in each section acquires.For the standardization between data, we should be normalized into two kinds with reference to empty
Under the conditions of gas.One be sea level when atmospheric density, reference is iso standard atmospheric density (1.225kg/m3)；Two be test
The atmospheric density average value of wind power generating set valid data measurement, is rounded up to the data of measurement closest to 0.05kg/
m3.When the atmospheric density in test blower place is in 1.225kg/m3±0.05kg/m3When in range, atmospheric density can be considered as
Normal air averag density, it is another to be selected as, it is airtight that atmospheric density is normalized to the test predefined standard null in blower place
Under degree.Calculate atmospheric density average value:
In formula, ρ10minFor the atmospheric density average value that 10min is obtained, T10minThe absolute temperature obtained for 10min is average
Value, the absolute temperature average value are calculated after being overlapped according to the temperature of temperature sensor real-time detection divided by the time.
B10minFor the air pressure average value that 10min is obtained, the air pressure average value is folded according to the air pressure of baroceptor real-time detection
It is calculated after adding divided by the time.R0For the gas constant 287.05J/ (kgK) of dry air.Wherein, according to ρ=PMmol/
RT can calculate air averag density, and P is the real-time air pressure of pressure sensor detection, and M is air molal weight, and R is constant, T
It can be by upper processing according to the real-time air averag density being calculated for the absolute temperature of temperature sensor real-time detection
The real-time superposition calculation of machine goes out ρ10min。
Normalization output power:
In formula, PnFor standardized output power, P10minFor the power average value that 10min is obtained, according to current sensor
The real-time current and voltage data that detect with voltage sensor can calculate the realtime power of wind power generating set, pass through reality
It applies after the superposition of power divided by the time it can be concluded that P10min, ρ0For standard air density.
Standardize wind speed:
In formula, VnFor standardized wind speed, V10minTo measure wind speed 10min average value, the measurement wind speed 10min is average
Value after the data investigation of air velocity transducer real-time detection divided by the time by obtaining.
The processing formula of wind speed and output power are as follows:
(D), in (E) formula, ViFor the standardized mean wind speed in i-th of section, Vn,i,jIt is standardized for i-th of section array j
Wind speed, PiAverage value after being standardized for i-th of section output power, Pn,i,jFor i-th of section array j output power mark
Average value after standardization, NiFor the number of i-th of section 10min array.
S3: the upper bit processing machine (1) calculates the function that Wind turbines to be measured are calculated using Wind turbines power characteristic
Rate coefficient, the formula of power coefficient are as follows:
In formula, Cp,iFor the power coefficient in i-th of section, ViAverage value after being standardized for i-th of section wind speed, PiFor
Average value after i-th of section output power standardization, A sweep away area, ρ for wind wheel0For standard air density；
S4: the upper bit processing machine (1) calculates wind power generating set annual electricity generating capacity, the wind power generating set annual electricity generating capacity
Calculating be to estimate to obtain according to the frequency distribution of reference difference wind speed and measurement power curve data, with the shape of Weibull distribution
Shape parameter is 2 frequency distribution of the frequency distribution i.e. rayleigh distributed as wind speed:
Using wind speed as the Rayleigh accumulated probability distribution function of parameter are as follows:
In formula, F (V) is the Rayleigh accumulated probability distribution function of wind speed, VAVEFor the annual mean wind speed of hub height；
When hub height annual mean wind speed is respectively 4m/s, 5m/s, 6m/s, 7m/s, 8m/s, 9m/s, 10m/s and 11m/s
When calculate corresponding annual electricity generating capacity:
The formula of annual electricity generating capacity estimation are as follows:
In formula, AEP is 1 year generated energy.NhFor the hourage in 1 year, about 8760 hours；N is section number, Vi
Average value after being standardized for i-th of section wind speed, PiFor the standardized average output power in i-th of section；
Summation Initialize installation are as follows:
Pi-1=0.0kw Vi-1=Vi-0.5m/s (I)
Embodiment:
For the demand analysis of power characteristic of wind driven generator set test macro it is found that system hardware configuration part is mainly real
Acquisition, pretreatment and the transmission of existing signal, mainly including the signals such as wind speed, wind direction, temperature, atmospheric pressure and electric current, voltage
Acquisition, is then transferred to host computer for the signal of acquisition.Thus selected main hardware are as follows: dsp chip is
The DSP development board of STM320F28335 chip；Upper bit processing machine is the PC machine equipped with Python；Sensor is respectively wind speed sensing
The cup type type sensor EL15-1A of device model；Wind transducer is cup type type wind transducer EL15-2DE；Atmospheric pressure sensing
Device；Temperature Humidity Sensor, current sensor and voltage sensor etc.；Aspect is acquired to AD, is with operational amplifier TLC274 core
Convert analog signals into the circuit design of digital signal based on piece, while connecting STM320F28335 chip, realize acquisition with
Pretreated result.It is converted into the voltage signal of 0~3V, by transmitter to the signal of input with ePWM (enhanced pulsewidth tune
Signal processed) setting of the realization to the sample rate of signal, while programming realization and the data of sampling are pre-processed, to the letter of acquisition
Number 100 times of amplification is carried out, improves the precision acquired to data.
The end power characteristic test macro PC software design, mainly in IEC 61400-12-1 standard to power characteristic at
Based on the method for reason, using modules such as pandas, matplotlib and web of Python, wind power generating set power is write
The processing routine of equal signals realizes signal analysis and processing.And the result after analysis is come out with the program display that Python writes.
The main module of wind-driven generator power system software design has signal disposal and analysis unit and Data Management Unit.At signal
Reason is the processing for realizing signal with analytical unit, mainly there is the standardization calculating of wind speed, the calculating of normalised power, annual electricity generating capacity
Calculating, the calculating of power coefficient etc.；Data Management Unit is the preservation and display function for realizing test data.
Attached drawing 2 is power characteristic of wind driven generator set measuring and calculation and assay surface.The upper left of attached drawing 2 is wind-driven generator
The power of group and the scatter plot of wind speed, are mainly calculated and are screened to the electric current of acquisition, voltage data；The upper right of attached drawing 2
For the maximum value of wind power generating set power, minimum value, average value, mean value scatter plot, it can be obtained from the figure that this measures the function of blower
Rate maximum value is about 1500KW, for the rated power of the blower；The left of attached drawing 2 is power graph, it can be obtained from the figure that blower exists
When wind speed is the wind speed of 8-15m/s, the power less stable of the Wind turbine；It is the power train of Wind turbine in the right side of attached drawing 2
Number；The lower-left of attached drawing 2 is respectively 4m/s, 5m/s, 6m/s, 7m/s, 8m/ in hub height annual mean wind speed for wind power generating set
S, estimation annual electricity generating capacity when 9m/s, 10m/s, 11m/s.
The push button function at 2 interface of attached drawing are as follows: " preservation " button is the preservation function to picture；" initial data screening " button
It is the function of the screening and calculating power to initial data；" data processing " button is to calculate all parameter functions；" all protect
Deposit that " button is the function that total data and picture are saved in a manner of compressed package；" exit that " button is the function that logs off.
Claims (2)
1. a kind of power characteristic of wind driven generator set test macro based on DSP, including upper bit processing machine (1), dsp chip (2),
Air velocity transducer (3), wind transducer (4), temperature sensor (5), baroceptor (6), current sensor (7) and voltage pass
Sensor (8), it is characterised in that: Python software built in the upper bit processing machine (1), the dsp chip (2) and upper bit processing machine
(1) with the connection of SCI serial communication signal, the air velocity transducer (3), wind transducer (4), temperature sensor (5), air pressure transmission
Sensor (6), current sensor (7), voltage sensor (8) are electrically connected with dsp chip.
2. a kind of power characteristic of wind driven generator set test macro based on DSP according to claim 1, feature exist
In application method is as follows:
S1: the air velocity transducer (3), wind transducer (4), temperature sensor (5), baroceptor (6), current sensor
(7) and voltage sensor (8) wind speed information, the wind direction information, temperature information, gas of hub of wind power generator height that will test
Current information, the information of voltage that pressure information and wind-driven generator generate are transmitted to dsp chip (2), and the dsp chip (2) will be each
The signal of sensor passes is acquired and pre-processes, and passes data to bit processing machine (1)；
S2: the upper bit processing machine (1) draws measurement power curve, the measurement power curve by output power standardize with it is defeated
The mean value that wind speed is standardized in each section out acquires:
Calculate atmospheric density average value:
In formula, ρ10minFor the atmospheric density average value that 10min is obtained, T10minFor the absolute temperature average value that 10min is obtained,
B10minFor the air pressure average value that 10min is obtained, R0For the gas constant 287.05J/ (kgK) of dry air；
Normalization output power:
In formula, PnFor standardized output power, P10minFor the power average value that 10min is obtained, ρ0For standard air density；
Standardize wind speed:
In formula, VnFor standardized wind speed, V10minTo measure wind speed 10min average value；
The processing formula of wind speed and output power are as follows:
(D), in (E) formula, ViFor the standardized mean wind speed in i-th of section, Vn,i,jFor i-th of the standardized wind of section array j
Speed, PiAverage value after being standardized for i-th of section output power, Pn,i,jIt is standardized for i-th of section array j output power
Average value later, NiFor the number of i-th of section 10min array；
S3: the upper bit processing machine (1) calculates the power train that Wind turbines to be measured are calculated using Wind turbines power characteristic
Number, the formula of power coefficient are as follows:
In formula, Cp,iFor the power coefficient in i-th of section, ViAverage value after being standardized for i-th of section wind speed, PiIt is i-th
Average value after a section output power standardization, A sweep away area, ρ for wind wheel0For standard air density；
S4: the upper bit processing machine (1) calculates wind power generating set annual electricity generating capacity, the meter of the wind power generating set annual electricity generating capacity
It estimates to obtain according to the frequency distribution of reference difference wind speed and measurement power curve data at last, be joined with the shape of Weibull distribution
Number is 2 frequency distribution of the frequency distribution i.e. rayleigh distributed as wind speed:
Using wind speed as the Rayleigh accumulated probability distribution function of parameter are as follows:
In formula, F (V) is the Rayleigh accumulated probability distribution function of wind speed, VAVEFor the annual mean wind speed of hub height；
The meter when hub height annual mean wind speed is respectively 4m/s, 5m/s, 6m/s, 7m/s, 8m/s, 9m/s, 10m/s and 11m/s
Calculate corresponding annual electricity generating capacity:
The formula of annual electricity generating capacity estimation are as follows:
In formula, AEP is 1 year generated energy.NhFor the hourage in 1 year, about 8760 hours；N is section number, ViIt is i-th
Average value after a section wind speed standardization, PiFor the standardized average output power in i-th of section；
Summation Initialize installation are as follows:
Pi-1=0.0kw Vi-1=Vi-0.5m/s (I)。
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Application publication date: 20190312 |