CN115308645A - Parameter configuration standardization method for variable pitch control system - Google Patents
Parameter configuration standardization method for variable pitch control system Download PDFInfo
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- 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
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- G01R31/64—Testing of capacitors
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- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a parameter configuration standardization method for a variable pitch control system, which comprises the following steps: s1: testing after meeting the testing conditions of the capacitor module and completing the initial setting of the blade to obtain initial capacitor module charge; s2: performing a capacitor feathering test to obtain a feathering capacitor module charge; s3: obtaining the lowest capacitor module charge based on the lowest working voltage of the variable pitch driver; s4: calculating the charge capacity of the capacitor module discharging once after the blades are feathered in place and calculating the residual charge capacity of the capacitor module; s5: and comparing the residual charge capacity of the capacitor module with the charge capacity of the capacitor module discharged once to obtain the health state index of the capacitor module. The invention has the beneficial effects that: the health state index of the capacitor module can be obtained according to the residual charge capacity of the capacitor module and the charge capacity of the capacitor module discharged once, and the health state of the capacitor module is measured through the health state index.
Description
Technical Field
The invention relates to the technical field of variable pitch system configuration, in particular to a parameter configuration standardization method for a variable pitch control system.
Background
At present, a capacitor module is increasingly applied due to the characteristics of high energy density, long service life, extremely long charge-discharge cycle life, high energy density and the like, and particularly becomes a main stream backup energy storage device of a variable pitch system of a wind turbine generator.
In the prior art, a specific threshold value is usually set for each specification type to judge the health state of a capacitor module, but the length of blades of a unit is various, the brand and the driver of a configured variable-pitch bearing are not unique, the friction coefficient and the characteristics of the driver are different, if the specific threshold value is set for each specification type to judge the health state of the capacitor module, the difficulty of field management is greatly increased, and a method for measuring the capacity state of the current capacitor module through indexes is needed, so that the capacitor module is safely and reliably used.
For example, a "method for arranging the capacity of a compensation capacitor in a substation" disclosed in chinese patent literature has a publication number: CN101635462B, filing date: in 2009, 04 and 28 days, the capacity configuration method of the substation compensation capacitor provided by the invention adopts an exhaustive method to calculate the capacity of each compensation capacitor group of the substation according to the reactive compensation capacity value of the substation, so as to search out the optimal commissioning number, and configures the capacity of the substation compensation capacitor according to the optimal number of groups, so that the compensation capacitor can meet the requirement of reactive compensation to the maximum extent, realize reactive local balance, and exert the maximum economic benefit of the compensation capacitor, but has the problem that the health state of a capacitance module cannot be measured through indexes.
Disclosure of Invention
Aiming at the defect that the health state of the capacitor module cannot be measured through indexes in the prior art, the invention provides a parameter configuration standardization method of a variable pitch control system, which can obtain the health state index of the capacitor module according to the residual charge capacity of the capacitor module and the charge capacity of the capacitor module discharged once, and measure the health state of the capacitor module through the health state index.
The technical scheme is that the parameter configuration standardization method of the variable pitch control system comprises the following steps of:
s1: testing after the capacitor module testing conditions are met and initial blade setting is completed to obtain initial capacitor module charge, performing temperature correction on the initial capacitor module charge, and performing secondary fitting on the SOC of the initial capacitor module charge;
s2: performing a capacitance feathering test to obtain the electrical charge of the feathering capacitor module, performing temperature correction on the electrical charge of the feathering capacitor module, and performing secondary fitting on the SOC of the electrical charge of the feathering capacitor module;
s3: obtaining the lowest capacitor module charge based on the lowest working voltage of the variable pitch driver, performing temperature correction on the lowest capacitor module charge, and performing quadratic fitting on the SOC of the lowest capacitor module charge;
s4: calculating the charge capacity of the capacitor module discharging once after the blade feathering is in place based on the initial capacitor module charge and the feathering capacitor module charge, and calculating the residual charge capacity of the capacitor module based on the feathering capacitor module charge and the lowest capacitor module charge;
s5: and comparing the residual charge capacity of the capacitor module with the charge capacity of the capacitor module discharged once to obtain a health state index of the capacitor module, measuring the health state and the test result of the capacitor module based on the health state index of the capacitor module, and recording the time and the test result of the capacitor feathering test.
Preferably, the capacitor module testing condition is that the unit normally operates without failure, the average power of the unit is lower than a set value, the capacitor testing period exceeds a period threshold value, the unit is in a non-high and low voltage ride through process, the testing time is within the range of the starting time and the ending time, the blades are initially set to adjust one blade to the set value, and the other two blades still keep the feathering position.
Preferably, initial capacitor module charges are obtained based on the real-time temperature of the capacitor module before blade feathering and the terminal voltage of the initial capacitor module, and secondary fitting is performed on the SOC of the initial capacitor module charges, wherein the expression is as follows:
Q initial ＝Q Initial temperature correction ×SOC Initial quadratic fit ，
Q Initial temperature correction ＝Q n ×[1+δ(t Initial -25)]，
In the formula, t Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Is the rated capacity, Q, of the capacitor module at 25 DEG C Initial temperature correction For the capacitor module at t Initial Capacity at temperature, Q Initiation of Is the initial capacitor module charge, delta is the temperatureCoefficient, U Initiation of Is the initial capacitor module terminal voltage, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
Preferably, the voltage of the capacitor module is input to a direct current bus of the driver, after the blade reaches the feathering position, the controller records the discharged temperature of the capacitor module after the blade is feathered and the terminal voltage of the capacitor module after the blade is feathered, so that the electric charge of the feathering capacitor module after the primary feathering is completed is obtained, and the SOC of the electric charge of the feathering capacitor module is subjected to secondary fitting, wherein the expression is as follows:
Q feathering ＝Q Feathering temperature correction ×SOC Feathering quadratic fit ，
Q Feathering temperature correction ＝Q n ×[1+δ(t Feathering -25)]，
In the formula, t Feathering Temperature, Q, after discharge of the capacitor module after feathering of the blade n Is the rated capacity, Q, of the capacitor module at 25 DEG C Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature, delta being temperature coefficient, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
Preferably, the lowest capacitor module charge is obtained based on the lowest working voltage of the variable pitch drive, and the SOC of the lowest capacitor module charge is subjected to quadratic fitting, wherein the expression is as follows:
Q minimum of ＝Q Minimum temperature correction ×SOC Least quadratic fit ，
C Minimum temperature correction ＝Q n ×[1+δ(t Lowest level of -25)]，
In the formula, t Lowest level of Temperature, Q, at which the capacitor module decays to its lowest charge capacity n Is the rated capacity, Q, of the capacitor module at 25 DEG C Minimum temperature correction For the capacitor module at t Lowest level of Capacity at temperature, delta being temperature coefficient, U Minimum of For minimum operating voltage of the pitch drive, U Rated value Rated voltage, mu, for the capacitor module 1 、μ 2 Is a correction factor.
Preferably, based on the initial capacitor module charge and the feathering capacitor module charge, calculating the charge capacity of the capacitor module discharging once after the blade feathering is in place, wherein the expression is as follows:
in the formula, t Feathering Is the temperature, t, of the discharged capacitor module after feathering of the blade Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Delta is the rated capacity of the capacitor module at 25 ℃, delta is the temperature coefficient, U Initial Is the initial capacitor module terminal voltage, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
Preferably, the capacitor module residual charge capacity is calculated based on the feathering capacitor module charge and the lowest capacitor module charge, and the expression is as follows:
in the formula, t Feathering Temperature, t, after discharge of the capacitor module after feathering of the blade Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Delta is the rated capacity of the capacitor module at 25 ℃, delta is the temperature coefficient, U Minimum of For minimum operating voltage of the pitch drive, U Feathering Terminal voltage of capacitor module after feathering, U Rated value Is a capacitor moduleConstant voltage, mu 1 、μ 2 Is a correction factor.
Preferably, the remaining charge capacity of the capacitor module and the charge capacity of the capacitor module discharged once are compared to obtain a health state index of the capacitor module, wherein the expression is as follows:
in the formula, Q Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature, SOC Feathering quadratic fit For the second fitted feathering capacitor module SOC, Q Minimum temperature correction For the capacitor module at t Lowest level of Capacity at temperature, SOC Least quadratic fit For the lowest capacitance module SOC, Q after quadratic fitting Initial temperature correction For the capacitor module at t Initial Capacity at temperature, SOC Initial quadratic fit And the initial capacitor module SOC after the quadratic fitting is performed.
Preferably, the determination condition of the test failure of the capacitor module is as follows: the health state index of the capacitor module is smaller than an index threshold, communication faults exist between the master control and the variable pitch in the test process, or the capacitor feathering time exceeds the feathering time threshold and does not reach the feathering position.
Preferably, if no fault occurs in the test process, the automatic start is delayed for several seconds, and if no fault occurs, the automatic start is stopped immediately.
The invention has the beneficial effects that: the health state index of the capacitor module can be obtained according to the residual charge capacity of the capacitor module and the charge capacity of the capacitor module discharged once, and the health state of the capacitor module is measured through the health state index.
Drawings
FIG. 1 is a flow chart of a method for standardizing parameter configuration of a pitch control system according to the present invention.
FIG. 2 is a detailed flowchart of a parameter configuration standardization method for a pitch control system according to the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): as shown in FIG. 1 and FIG. 2, a parameter configuration standardization method for a pitch control system comprises the following steps:
s1: testing after the capacitor module testing conditions are met and initial blade setting is completed to obtain initial capacitor module charge, performing temperature correction on the initial capacitor module charge, and performing secondary fitting on the SOC of the initial capacitor module charge;
s2: performing a capacitance feathering test to obtain the electrical charge of the feathering capacitor module, performing temperature correction on the electrical charge of the feathering capacitor module, and performing secondary fitting on the SOC of the electrical charge of the feathering capacitor module;
s3: obtaining the lowest capacitor module charge based on the lowest working voltage of the variable pitch driver, carrying out temperature correction on the lowest capacitor module charge, and carrying out quadratic fitting on the SOC of the lowest capacitor module charge;
s4: calculating the charge capacity of the capacitor module discharging once after the blade feathering is in place based on the initial capacitor module charge and the feathering capacitor module charge, and calculating the residual charge capacity of the capacitor module based on the feathering capacitor module charge and the lowest capacitor module charge;
s5: and comparing the residual charge capacity of the capacitor module with the charge capacity of the capacitor module discharged once to obtain a health state index of the capacitor module, measuring the health state and the test result of the capacitor module based on the health state index, and recording the feathering test time and the test result of the capacitor.
S1: the method comprises the steps of testing after the capacitor module testing conditions are met and initial blade setting is completed to obtain initial capacitor module charges, carrying out temperature correction on the initial capacitor module charges, and carrying out secondary fitting on the SOC of the initial capacitor module charges.
Specifically, judge whether the unit satisfies the capacitor module test condition, the test condition includes: the normal operation of the unit has no fault; the average power of the unit in five minutes is lower than a set value (100 kW); the capacitance test period is greater than or equal to 14 days; enabling parameters of the variable-pitch capacitor module are 1; the unit is in a non-high and low voltage ride through process; the test time is in the range of a starting time and an ending time, the starting time is 7 points, and the ending time is 17 points.
The variable-pitch capacitor module is characterized in that the test enabling parameter is 1, the software and hardware EFC signal is 1 (EFC is an emergency feathering control command), the variable-pitch power switch is in a closed state, after one blade is adjusted to a set value (the parameter default value is 0.5 degrees), the other two blades still keep feathering positions (usually 90 degrees), and the real-time temperature t before the capacitor module discharges before the blades feathering is automatically recorded Initial And initial capacitor module terminal voltage U Initiation of Obtaining the following initial capacitor module charge Q Initial ；
Q Initial ＝Q Initial temperature correction ×SOC Initial quadratic fit (1)
Q Initial temperature correction ＝Q n ×[1+δ(t Initial -25)] (2)
In the formula, t Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Is rated capacity, Q, of the capacitor module at 25 DEG C Initial temperature correction For the capacitor module at t Initial Capacity at temperature, Q Initiation of The initial capacitor module charge is delta, delta is a temperature coefficient, and the delta values in different temperature intervals are different;
because the ratio of the open-circuit voltage of the capacitor and the ratio (SOC) of the charging capacity and the rated capacity of the capacitor module do not strictly correspond, the open-circuit voltage is corrected, the ratio of the open-circuit voltage and the SOC are subjected to quadratic fitting by adopting a least square method, and the voltage correction factor is obtained to be mu 1 、μ 2 Current capacitor module SOC Initial quadratic fit And terminal voltage U of initial capacitor module Initial The corresponding relation is formula;
in the formula of U Initial Is the terminal voltage of the initial capacitor module, U Rated value Rated voltage, mu, for the capacitor module 1 、μ 2 Is a correction factor.
S2: and carrying out a capacitive feathering test to obtain the electric charge of the feathering capacitor module, carrying out temperature correction on the electric charge of the feathering capacitor module, and carrying out secondary fitting on the SOC of the electric charge of the feathering capacitor module.
Specifically, the power supply of the variable-pitch driver 400VAC is cut off and maintained, then the EFC signal of software and hardware is set to be 0 (EFC is an emergency feathering control command), and the voltage of the capacitor module is directly input to a direct current bus of the driver to execute the emergency feathering action; when the blade reaches the feathering position (the default value of the parameter is 88 degrees), the temperature t of the capacitor module after feathering after discharging is automatically recorded by a controller Feathering And voltage U of capacitor module Feathering Obtaining the following capacitor module charge Q after one feathering Feathering ；
Q Feathering ＝Q Feathering temperature correction ×SOC Feathering quadratic fit (4)
Q Feathering temperature correction ＝Q n ×[1+δ(t Feathering -25)](5)
In the formula, t Feathering The temperature of the discharged capacitor module after the blades are feathered; q n Is the rated capacity, Q, of the capacitor module at 25 DEG C Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature; delta is a temperature coefficient, and delta values in different temperature intervals are different.
At the moment, the feathering rear capacitor module SOC Feathering quadratic fit And voltage U at the end of the feathering rear capacitor module Feathering The corresponding relationship is as follows;
in the formula of U Feathering For the end voltage of the capacitor module after feathering, U Rated value Rated voltage, mu, for the capacitor module 1 、μ 2 Is a correction factor.
S3: and obtaining the lowest capacitor module charge based on the lowest working voltage of the variable pitch driver, carrying out temperature correction on the lowest capacitor module charge, and carrying out quadratic fitting on the SOC of the lowest capacitor module charge.
In particular, according to pitch drivesMinimum operating voltage U of Lowest level of Obtaining the lowest capacitance module charge Q Lowest level of ；
Q Minimum of ＝Q Minimum temperature correction ×SOC Least quadratic fit (7)
C Minimum temperature correction ＝Q n ×[1+δ(t Lowest level of -25)] (8)
In the formula, t Lowest level of Temperature, Q, at which the capacitor module decays to the lowest charge capacity n Is the rated capacity, Q, of the capacitor module at 25 DEG C Minimum temperature correction For the capacitor module at t Lowest level of The capacity at temperature, delta, is the temperature coefficient, and the interval delta values at different temperatures are different.
SOC when the capacitive module decays to the lowest charge capacity Least quadratic fit The voltage U at the end of the capacitor module Lowest level of The corresponding relationship is as follows;
in the formula of U Lowest level of For minimum operating voltage of the pitch drive, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
S4: and calculating the charge capacity of the capacitor module discharging once after the blade feathering is in place based on the initial capacitor module charge and the feathering capacitor module charge, and calculating the residual charge capacity of the capacitor module based on the feathering capacitor module charge and the lowest capacitor module charge.
Specifically, according to the initial capacitor module charge Q Initial And capacitor module charge Q after one feathering Feathering Obtaining the charge capacity delta of the capacitor module discharging once after the blade feathering is in place Once discharge ：
In the formula, t Feathering Discharging the capacitor module after feathering of the bladeAfter temperature, t Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Delta is the rated capacity of the capacitor module at 25 ℃, delta is the temperature coefficient, U Initial Is the terminal voltage of the initial capacitor module, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
Capacitor module charge Q after one-time feathering Feathering And lowest capacitance module charge Q Lowest level of Calculating the residual charge capacity Δ of the capacitor module Remains of ：
In the formula, t Feathering Is the temperature, t, of the discharged capacitor module after feathering of the blade Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Delta is the rated capacity of the capacitor module at 25 ℃, delta is the temperature coefficient, U Minimum of For minimum operating voltage of the pitch drive, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
S5: and comparing the residual charge capacity of the capacitor module with the charge capacity of the capacitor module discharged once to obtain a health state index of the capacitor module, measuring the health state and the test result of the capacitor module based on the health state index, and recording the time and the test result of the capacitive feathering test.
Specifically, the residual charge capacity Delta of the capacitor module Remainder of And the charge capacity delta of the capacitor module discharging once after the blade feathering is in place Discharge of electricity A Next time Comparing to obtain the health state index (PHM) and the residual charge capacity delta of the capacitor module Remains of And the charge capacity Δ of one discharge Discharging electricity A Next time The larger the ratio of the capacitance value to the capacitance value, the better the health state of the capacitance module; considering the factors of high and low voltage ride through of the machine set, the residual charge capacity delta of the capacitor module is used Remains of Is greater thanCharge capacity Δ of once discharged Discharge of electricity A Next time The end of the service life of the module is determined according to the 1.3 times of the service life of the module, the time is delayed for 3s after the blade reaches the feathering position (the parameter default value is 88 degrees), and the capacitor module test of the next blade is carried out.
In the formula, Q Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature, SOC Feathering quadratic fit For the second fitted feathering capacitor module SOC, Q Minimum temperature correction For the capacitor module at t Minimum of Capacity at temperature, SOC Least quadratic fit For the lowest capacitance module SOC, Q after quadratic fitting Initial temperature correction For the capacitor module at t Initial Capacity at temperature, SOC Initial quadratic fit And the initial capacitor module SOC after the quadratic fitting is performed.
If the PHM is less than 1 or the communication fault between the main control and the variable pitch in the test process or the capacitor feathering time exceeds 30s and does not reach the feathering position (the parameter default value is 88 degrees), the capacitor module corresponding to the blade is judged to fail in the test, and a 400V main power supply is thrown into the safe position for feathering. And recording the fault and carrying out capacitance test on the next shaft cabinet.
Recording the time of the capacitive feathering test, the test result and the like (the test result does not pass and the start is not allowed) after the test is finished; setting the test enabling parameter of the variable-pitch capacitor module to be 0, and closing a variable-pitch power switch; if no fault occurs in the test process, the automatic start is delayed for 5 seconds, otherwise, the normal stop is immediately executed.
Claims (10)
1. A parameter configuration standardization method for a variable pitch control system is characterized by comprising the following steps:
s1: testing after meeting the testing conditions of the capacitor module and finishing the initial setting of the blade to obtain initial capacitor module charge, performing temperature correction on the initial capacitor module charge, and performing quadratic fitting on the SOC of the initial capacitor module charge;
s2: performing a capacitance feathering test to obtain the electrical charge of the feathering capacitor module, performing temperature correction on the electrical charge of the feathering capacitor module, and performing secondary fitting on the SOC of the electrical charge of the feathering capacitor module;
s3: obtaining the lowest capacitor module charge based on the lowest working voltage of the variable pitch driver, performing temperature correction on the lowest capacitor module charge, and performing quadratic fitting on the SOC of the lowest capacitor module charge;
s4: calculating the charge capacity of the capacitor module discharging once after the blade feathering is in place based on the initial capacitor module charge and the feathering capacitor module charge, and calculating the residual charge capacity of the capacitor module based on the feathering capacitor module charge and the lowest capacitor module charge;
s5: and comparing the residual charge capacity of the capacitor module with the charge capacity of the capacitor module discharged once to obtain a health state index of the capacitor module, measuring the health state and the test result of the capacitor module based on the health state index of the capacitor module, and recording the time and the test result of the capacitor feathering test.
2. The method of claim 1, wherein the capacitive module testing conditions are that the unit is operating normally without failure, the average power of the unit is lower than a set value, the capacitive testing period exceeds a period threshold, the unit is in a non-high and low voltage ride through process, the testing time is within a start time and an end time range, the blades are initially set to adjust one blade to the set value, and the other two blades are still in a feathering position.
3. The method of claim 1, wherein initial capacitor module charge is obtained based on real-time temperature of discharge of a capacitor module before blade feathering and terminal voltage of the initial capacitor module, and secondary fitting is performed on SOC of the initial capacitor module charge, and the expression is as follows:
Q initial ＝Q Initial temperature correction ×SOC Initial quadratic fit ，
Q Initial temperature correction ＝Q n ×[1+δ(t Initiation of -25)]，
In the formula, t Initial For real-time temperature, Q, before discharge of blade feathering front capacitor module n Is the rated capacity, Q, of the capacitor module at 25 DEG C Initial temperature correction For the capacitor module at t Initial Capacity at temperature, Q Initiation of Is the initial capacitor module charge, delta is the temperature coefficient, U Initial Is the terminal voltage of the initial capacitor module, U Rated value Rated voltage, mu, for the capacitor module 1 、μ 2 Is a correction factor.
4. The method according to claim 3, wherein the voltage of the capacitor module is applied to a DC bus of the driver, and when the blade reaches the feathering position, the controller records the discharged temperature of the capacitor module after the blade feathers and the voltage across the capacitor module after the feathering to obtain the charge of the feathering capacitor module after the primary feathering is completed, and performs secondary fitting on the SOC of the charge of the feathering capacitor module, wherein the expression is as follows:
Q feathering ＝Q Feathering temperature correction ×SOC Feathering quadratic fit ，
Q Feathering temperature correction ＝Q n ×[1+δ(t Feathering -25)]，
In the formula, t Feathering Temperature, Q, after discharge of the capacitor module after feathering of the blade n Is the rated capacity, Q, of the capacitor module at 25 DEG C Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature, delta being temperature coefficient, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
5. The method of claim 4, wherein a lowest capacitance module charge is obtained based on a lowest working voltage of the pitch drive, and a quadratic fit is performed on the SOC of the lowest capacitance module charge, wherein the expression is as follows:
Q minimum of ＝Q Minimum temperature correction ×SOC Least quadratic fit ，
C Minimum temperature correction ＝Q n ×[1+δ(t Lowest level of -25)]，
In the formula, t Minimum of Temperature, Q, at which the capacitor module decays to the lowest charge capacity n Is the rated capacity, Q, of the capacitor module at 25 DEG C Minimum temperature correction For the capacitor module at t Lowest level of Capacity at temperature, delta being temperature coefficient, U Lowest level of For minimum operating voltage of the pitch drive, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
6. The method according to claim 5, wherein the charge capacity of the capacitor module for discharging once after the blade feathering is in place is calculated based on the initial capacitor module charge and the feathering capacitor module charge, and the expression is as follows:
in the formula, t Feathering Is the temperature, t, of the discharged capacitor module after feathering of the blade Initiation of For real-time temperature, Q, before discharge of blade feathering front capacitor module n Is a capacitorRated capacity of the module at 25 ℃, delta being temperature coefficient, U Initial Is the initial capacitor module terminal voltage, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
7. The method of claim 5, wherein the capacitance module residual charge capacity is calculated based on the feathering capacitance module charge and the lowest capacitance module charge, and the expression is as follows:
in the formula, t Feathering Temperature, t, after discharge of the capacitor module after feathering of the blade Initiation of For real-time temperature, Q, before discharge of blade feathering front capacitor module n Delta is the rated capacity of the capacitor module at 25 ℃, delta is the temperature coefficient, U Lowest level of For minimum operating voltage of the pitch drive, U Feathering For the end voltage of the capacitor module after feathering, U Rated value For the rated voltage, mu, of the capacitor module 1 、μ 2 Is a correction factor.
8. The method for standardizing parameter configuration of a pitch control system according to claim 1, wherein a capacitance module health state index is obtained by comparing a residual charge capacity of a capacitance module with a charge capacity of the capacitance module discharged once, and an expression is as follows:
in the formula, Q Feathering temperature correction For the capacitor module at t Feathering Capacity at temperature, SOC Feathering quadratic fit For the second fitted feathering capacitor module SOC, Q Minimum temperature correction For the capacitor module at t Lowest level of Capacity at temperature, SOC Least quadratic fit For the lowest capacitance module SOC, Q after quadratic fitting Initial temperature correction For the capacitor module at t Initial Capacity at temperature, SOC Initial quadratic fit And obtaining the initial capacitor module SOC after quadratic fitting.
9. The method for standardizing parameter configuration of a pitch control system according to claim 1, wherein the determination condition of the failure of the test of the capacitive module is: the health state index of the capacitor module is smaller than an index threshold, communication faults exist between the master control and the variable pitch in the test process, or the capacitor feathering time exceeds the feathering time threshold and does not reach the feathering position.
10. The method for standardizing parameter configuration of a pitch control system according to claim 1, wherein an automatic start-up is delayed for several seconds if no fault occurs during the test process, and otherwise the system is immediately and normally shut down.
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| CN202210832616.XA CN115308645B (en) | 2022-07-14 | 2022-07-14 | Parameter configuration standardization method for variable pitch control system |
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| CN202210832616.XA CN115308645B (en) | 2022-07-14 | 2022-07-14 | Parameter configuration standardization method for variable pitch control system |
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