CN113759167A - Method for online testing power transfer coefficient of turbine set by guide vane opening degree of water turbine - Google Patents
Method for online testing power transfer coefficient of turbine set by guide vane opening degree of water turbine Download PDFInfo
- Publication number
- CN113759167A CN113759167A CN202111064367.6A CN202111064367A CN113759167A CN 113759167 A CN113759167 A CN 113759167A CN 202111064367 A CN202111064367 A CN 202111064367A CN 113759167 A CN113759167 A CN 113759167A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- power
- unit
- vane opening
- coefficient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000012546 transfer Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000012937 correction Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 20
- 230000009471 action Effects 0.000 claims abstract description 15
- 230000008859 change Effects 0.000 claims description 16
- 230000002829 reductive effect Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Water Turbines (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
An on-line testing method for a power transmission coefficient of a turbine guide vane opening to a set is used for judging that the set is in a non-vibration area and is in non-variable load working condition operation on a hydroelectric generating set which is operated in a grid-connected mode under an opening closed-loop control mode. The process variable signal during the primary frequency modulation action is measured and recorded at the current head. And calculating the power transfer coefficient of the guide vane opening of the unit and the power transfer coefficient of the guide vane opening instruction under the current water head. The confidence of the original values of the coefficients is calculated and optimized. And obtaining an identification data group of the guide vane opening of the working condition point of the measured unit under the current water head and the transmission coefficient of the unit power. And judging the frequency degree of the primary frequency modulation action, and adjusting the number of the calculation samples. And improving a correction coefficient alpha between the guide vane opening and the active power, and finally obtaining a correction coefficient array of the unit under the full-load working conditions under different water heads by correcting the guide vane opening instruction on line through alpha. The method can obtain the transmission rule between the opening degree of the guide vane of the unit and the active power under all working conditions.
Description
Technical Field
The invention belongs to the technical field of operation of hydraulic power plants, and particularly relates to an online testing method for a power transmission coefficient of a unit by using the opening degree of a guide vane of a water turbine.
Background
The grid-connected running water turbine generator sets usually work in an opening closed-loop control mode according to requirements, and the primary frequency modulation control mode of the water turbine generator sets also takes the opening as a response target. The control target of the primary frequency modulation of the unit is the guide vane opening, and the guide vane opening and the unit power are actually controlled in an open loop mode. Therefore, the actual power of the primary frequency modulation of the water turbine is often checked because the actual power does not meet the standard requirements under the nonlinear influence of the water purification head of the unit, the water level of the surge shaft and the power of the unit. The method is also a main reason that the adjustment indexes of tests in a certain season meet requirements, but the frequency modulation power amplitude of primary frequency modulation in operation in other seasons does not meet the requirements, which causes some power stations with large reservoir water level amplitude.
The water turbine generator set which is in grid-connected operation according to the standard requirement is put into primary frequency modulation operation. The primary frequency modulation function can automatically control the unit to increase or decrease the active power according to the system frequency deviation when the external load changes, and is an important function for keeping the active power balance and stabilizing the system frequency of the power grid.
The general index requirements for the primary frequency modulation of the hydroelectric generating set comprise: (1) artificial dead zone of primary frequency modulation; (2) the difference rate or the permanent state slip coefficient of the primary frequency modulation; (3) limiting the frequency modulation power of the primary frequency modulation; (4) response rate of primary frequency modulation; (5) the settling time of the primary frequency modulation. The requirement on the difference rate and the permanent state slip coefficient is that the difference rate of primary frequency modulation is not more than 3% or the permanent state slip coefficient is not more than 4%. The amplitude limit requirement of the primary frequency modulation is that the frequency modulation load variation amplitude of the hydroelectric generating set in the load increasing direction is not less than 10% of the rated load, and the frequency modulation load variation amplitude of the load reducing direction is not limited in principle.
The model of the hydraulic generator set provided by 'parameter actual measurement and modeling guide rule of synchronous generator prime mover and adjusting system thereof' DL/T1235 can be obtained by the theorem analysis of the steady-state final value. The relation between the power regulation steady state value and the power grid frequency variation of the hydro-turbo generator set adopting the opening control mode can be expressed as follows:
therefore, in the opening mode, the moment transfer coefficient ey is influenced by the unit opening between the frequency modulation power regulation steady-state value and the power grid frequency. The ey mainly influences the steady-state final value of the primary frequency modulation adjusting process, and the higher the water head of the random group of the coefficient is, the larger the value is.
Although the transmission coefficient ey of the moment of the water turbine to the opening degree of the guide vane can better reflect the response characteristic of the primary frequency modulation of the water turbine under different operating conditions, the hydraulic moment is inconvenient to measure, and the control of directly correcting the primary frequency modulation by utilizing the ey is difficult to realize.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the method for testing the power transfer coefficient of the unit by the guide vane opening of the water turbine on line, and the method can solve the problems of insufficient power regulation and primary frequency modulation integral electric quantity of the unit caused by factors such as water head change, water level fluctuation of a pressure regulating chamber and the like in the current opening mode, and enhances the primary frequency modulation capability of the unit. Through automatic calculation of a plurality of working condition points, the transmission rule between the opening degree of the guide vane of the unit and the active power under all working conditions can be obtained.
In order to achieve the purpose, the invention adopts the technical scheme that:
an online test method for a power transfer coefficient of a set by the opening degree of a guide vane of a water turbine comprises the following steps;
(1) automatically judging whether the water turbine generator set operates in a non-vibration area and a non-variable load working condition for the water turbine generator set which operates in a grid-connected mode in an opening closed-loop control mode;
(2) under the current water head, automatically measuring and recording process variable signals such as frequency deviation delta f, guide vane instruction YRef, guide vane opening Y, active power P and the like in the primary frequency modulation action process according to a power change rule, and recording the group of data as a working condition point T1N1 under the current water head;
(3) calculating a power transfer coefficient A1 of a guide vane opening Y pair of the unit under the water head of T1, and a power transfer coefficient A2 of a guide vane opening Y command pair;
(4) automatically calculating and optimizing the confidence coefficient of the original values of the guide vane opening and the transmission coefficient A of the unit power;
(5) adopting automatic fitting calculation to obtain an identification data group of the guide vane opening degree of the working condition point of the measured unit under the current water head and the transmission coefficient A of the unit power;
(6) according to the interval time of 5 continuous effective primary frequency modulation actions, judging the frequency degree of the primary frequency modulation actions, and automatically adjusting and calculating the number of samples;
(7) improving the confidence of a correction coefficient alpha between the opening degree of the guide vane and the active power, and reducing the guide vane fluctuation caused by the change of the correction coefficient alpha;
(8) continuously calculating in the running process of the unit to obtain a data group of correction coefficients alpha of T1N1, T1N2, … and T1Nn under the current water head;
(9) the guide vane opening instruction YRef can be corrected on line through alpha, so that the transmission coefficient A is always more than 1.33 under the current water head full-load working condition;
(10) and when the actually measured water head change amplitude is larger than a preset value M meters, automatically and repeatedly circulating the process to finally obtain a correction coefficient array of the unit under the full-load working conditions under different water heads.
The criterion of the unit under the non-variable load working condition in the step (1) comprises the following steps:
1) the deviation between the total plant AGC command and the actual plant power is not more than 2% of the rated plant power;
2) the deviation of the single-machine AGC instruction execution value and the single-machine actual transmission power is not more than 2% of the single-machine rated power.
And (3) the power change rule of the step (2) is the power change rule according to N1% Pe, N2% Pe, … and Nn% Pe.
And (3) automatically calculating a power transfer coefficient A1 of the unit guide vane opening degree and a power transfer coefficient A2 of the guide vane opening degree instruction under the water head of T1 respectively, and carrying out validity judgment on the deviation range of the power transfer coefficient A and the power transfer coefficient A, so that the jump of result values caused by water flow inertia time and power delay in the process of calculating the transfer coefficient A is reduced.
The calculation formula of the guide vane opening degree to power transfer coefficient A1 and the guide vane opening degree instruction to power transfer coefficient A2 of the unit is as follows:
A1＝bp/ep＝(ΔP/Pe)/(ΔY/100) ①
A2＝bp/ep＝(ΔP/Pe)/(ΔYref/100) ②
the permanent state slip coefficient bp of the hydroelectric generating set is not more than 4%, the slip ratio ep is not more than 3%, and the bp/ep is 1.33.
And if the deviation between the A1 and the A2 meets the condition that the value of the deviation within 5 percent is a valid value, otherwise, discarding the point, and forming an original value data set of the guide vane opening and the transmission coefficient A of the unit power by using the valid data value of the point.
And (5) automatically fitting the identification data group of the guide vane opening degree of a certain working condition point under the current water head and the transmission coefficient A of the unit power, automatically smoothing the data, and reducing sharp points in data transition.
And (5) automatically adjusting the number of the test samples according to the frequency degree of the primary frequency modulation action in the step (6), and improving the reliability of the calculation result of the transmission coefficient A.
In the step (8), calculating a correction coefficient alpha between the opening of the guide vane of the water turbine and the active power according to the principle that A is more than 1.33;
α＝1.33/A。
the invention has the beneficial effects that:
1. the method for testing the power transfer coefficient of the turbine set on line by the opening degree of the guide vane of the water turbine fills a gap;
2. the invention better solves the problems that the response characteristic of the water turbine under different operating conditions of primary frequency modulation can be better reflected by the torque transfer coefficient ey of the water turbine under the opening degree, but the hydraulic torque is inconvenient to measure and is difficult to directly use in engineering.
3. The invention provides a method for estimating the power transfer coefficient of a unit by the opening degree of a guide vane of the unit under any water head and verifies the method in actual engineering. The invention is practical and effective in improving the integral power of primary frequency modulation in the opening mode, is simple and convenient to use on site and has practical value.
4. The invention has auxiliary effect on inhibiting the water level fluctuation of the pressure regulating chamber. The convergence speed of the water level fluctuation of the pressure regulating chamber of the hydraulic generator set operating in the power mode can be accelerated.
5. The invention has universality. The method can be applied to mixed-flow units, axial flow rotary propeller and through-flow units.
Drawings
FIG. 1 is a logic block diagram of an aspect of the present invention.
Fig. 2 is a block diagram of the logical relationship between the coefficient a & alpha and the original speed regulator in the scheme of the invention.
Fig. 3 is a curve of transmission coefficients a1 and a2 measured under a characteristic water head of a certain test unit.
FIG. 4 is an actual measurement curve showing the open-loop relation between the opening of the guide vane of a certain test unit and the active power after the test unit is corrected by the method of the invention under the characteristic water head.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention discloses a method for testing the power transfer coefficient of a unit by the opening degree of a guide vane of a water turbine, which meets the requirements of the hydropower unit on the primary frequency modulation rotating speed unequal rate and the difference modulation rate in the technical Specification for coordination of grid sources of an electric power system DL/T1870. The permanent state slip coefficient bp of the hydroelectric generating set is not more than 4 percent, the slip rate ep is not more than 3 percent, then
bp/ep＝1.33
The requirement of primary frequency modulation on the transmission coefficient of energy between the opening of a guide vane of a water turbine and the power of a unit is not less than 1.33. The specific test method for the power transfer coefficient of the unit according to the required guide vane opening of the water turbine comprises the following steps:
(1) and (5) carrying out static characteristic test on the water turbine follow-up system in a shutdown state. The tested unit should meet the corresponding index requirements of a hydraulic turbine electrohydraulic servo system in the water turbine speed regulating system test GB/T9652.2.
(2) The unit is in grid-connected operation, and the program automatically judges that the unit is in a non-vibration area and under a non-variable load working condition;
(3) under the current water head, according to the power change rule of N1% Pe, N2% Pe, … and Nn% Pe, measuring and recording the process variable signals such as frequency deviation Delta f, guide vane instruction YRef, guide vane opening Y, active power P and the like in the primary frequency modulation action process. Recording the group of data as a working condition point T1N1 under the current water head;
(4) according to the active power and the change rule of the guide vane opening obtained by measurement, calculating a guide vane opening-to-power transfer coefficient A1 and a guide vane opening instruction-to-power transfer coefficient A2 of the current water head lower unit according to the formula I and the formula II.
A1＝bp/ep＝(ΔP/Pe)/(ΔY/100) ①
A2＝bp/ep＝(ΔP/Pe)/(ΔYref/100) ②
(5) And comparing the deviation of A1 with A2, wherein the value meeting the deviation within 5 percent is a valid value, and otherwise, discarding the point. Forming an original value data group of the guide vane opening and the transmission coefficient A of the unit power by using the effective data values of the points;
(6) calculating identification parameters by adopting automatic fitting, and calculating to obtain an identification data group of the guide vane opening of the working condition point of the measured unit under the current water head and the transmission coefficient A of the unit power;
(7) if A is more than 1.33, a correction coefficient alpha between the opening of a guide vane of the water turbine and active power is considered;
(8) continuously calculating in the running process of the unit to obtain a data group of correction coefficients alpha of T1N1, T1N2, … and T1Nn under the current water head;
(9) correcting the guide vane opening degree instruction YRef through a correction coefficient alpha to enable the transmission coefficient to be always larger than 1.33 under the current water head full-load working condition;
(10) and when the actually measured change amplitude of the current water head is larger than a preset value M meters, repeating the processes from the 2 nd item to the 9 th item, and finally obtaining a correction coefficient array of the unit under the full-load working conditions under different water heads.
(11) For a unit having an inlet surge chamber or a tail water surge chamber, the program has a program for correcting the pressure fluctuation of the volute.
The invention relates to a method for testing the power transfer coefficient of a turbine set by the opening degree of a guide vane of a water turbine on line, which comprises the following specific implementation steps:
the specific operation method in the shutdown state is as follows:
and (5) carrying out static characteristic test on the water turbine follow-up system. Adding a 50Hz stable signal on a cabinet terminal, simulating a grid-connected signal, manually stabilizing the stroke of the servomotor near about 50%, canceling an artificial frequency dead zone, setting bp to be 4%, setting Kp to be 10, setting Ki to be 10, and setting Kd to be 0. The frequency of the machine is gradually increased from 50Hz to 51.0Hz by 0.2Hz step, and the frequency returns to 49.0Hz after being stabilized and finally returns to 50 Hz. And respectively measuring the relationship between the opening degree and the frequency of the guide vane servomotor when the frequency dead zone of A, B two sets of controllers is set to be 0.
The relation between the opening degree and the frequency of the guide vane servomotor of the tested unit can meet the requirement of 'Water turbine speed regulating System test' GB/T9652.2. The frequency measurement precision is not more than 0.005Hz, the linearity error of the static characteristic curve is not more than 5 percent, and the rotating speed dead zone is less than 0.04 percent. And if the indexes are not met, the electro-hydraulic servo system is adjusted until the indexes are met.
Fig. 1 is a logic diagram of the present invention, which includes 15 steps and methods. The specific operation method in the grid-connected state comprises the following steps:
and step S1, judging that the unit is in the non-vibration region working condition operation under the unit grid-connected state.
And step S2, judging that the unit is in a non-variable load working condition in the grid-connected state of the unit. The criterion of the unit under the non-variable load working condition comprises the following steps:
1) the deviation between the total plant AGC command and the actual plant power is not more than 2% of the rated plant power;
2) the deviation of the single-machine AGC instruction execution value and the single-machine actual transmission power is not more than 2% of the single-machine rated power.
And step S3, under the water head of T1, measuring and recording process variable signals such as frequency deviation delta f, guide vane instruction YRef, guide vane opening Y, active power P and the like in the primary frequency modulation action process according to the power change rule of N1% Pe, N2% Pe, … and Nn% Pe.
Step S4, a1 and a2 transfer coefficients are calculated for a T1 head. Wherein A1 is the guide vane opening degree of the unit to the power transfer coefficient, and A2 is the guide vane opening degree instruction to the power transfer coefficient.
And step S5, automatically rejecting the calculated A1 and A2 values in the event that the duration time of the primary frequency modulation action is less than t seconds (the t duration is adjustable, and the initial value is 9 seconds). The influence of the dead zone on the calculation result of the transfer coefficient A is reduced.
And step S6, judging and calculating, and calculating transfer coefficients A1 and A2 by using 5 continuous effective primary frequency modulation action events.
In step S7, if 5 valid primary fm events have too long interval. If the interval time between the (k + n) th time and the (k + n) th time 1 is longer than x seconds (the x time length is adjustable, the initial value is 1800 seconds), the number of samples for calculating the values of A1 and A2 in the (k + n) th 1-time primary frequency modulation action event is automatically increased.
Step S8, carrying out weight comparison on the A1 group of data samples and eliminating unreliable values;
step S9, carrying out weight comparison on the A2 group of data samples and eliminating unreliable values;
in step S10, the deviation between A1 and A2 is compared to be not more than u% (u is adjustable and has an initial value of 5%). Removing the unreliable sampling points to obtain the original values of the guide vane opening degree with high reliability and the transmission coefficient A of the unit power;
step S11, calculating identification parameters by adopting automatic fitting, and calculating to obtain an identification data group of guide vane opening of the working condition point of the measured unit under the current water head and the transmission coefficient A of the unit power;
step S12, as shown in fig. 2, is a block diagram of the logical relationship between the coefficient a & α and the original governor in the solution of the present invention. Calculating a correction coefficient alpha between the opening degree of the guide vane of the water turbine and the active power according to the principle that A is more than 1.33;
α＝1.33/A
step S13, continuously calculating in the running process of the unit to obtain a data group of correction coefficients alpha of N1, N2, … and Nn load points under a T1 waterhead;
step S14, correcting the guide vane opening instruction YRef through the correction coefficient alpha, so that the transmission coefficient is always more than 1.33 under the full-load working condition of the T1 water head;
and step S15, when the actually measured water head change amplitude is larger than a preset value M M meters (the M value is adjustable, and the initial value is 5 meters), repeating the processes of the step 1 to the step 14, and finally obtaining a correction coefficient array of the unit under the full-load working conditions under different water heads.
The implementation case is as follows: the type of a certain test unit is mixed flow type, a single-unit single-pipe water diversion mode is adopted in a water delivery system, the rated active power is 600MW, the rated water head is 120m, and the rated flow is 567m 3/s.
Fig. 3 is an actually measured curve of a test unit at a head of 110m, in which a dotted line represents an actually measured value of the guide vane opening degree to the unit power transfer coefficient a1, and a solid line represents an actually measured value of the command to the power transfer coefficient a 2. The measured data is available. At a head of 110m the transfer coefficients a1, a2 are non-linear over the full load range with random group load increases.
FIG. 4 is an actual measurement curve showing the open-loop relation between the opening of the guide vane of a certain test unit and the active power after the test unit is corrected by the method of the invention under the current water head. The conversion coefficients of the opening and the power corrected by the test result are both larger than 1.3 in the full load section, the linearity correlation coefficient R2 of the full stroke is larger than 0.996, and the linearity of the conversion coefficients of the opening and the power of the unit is better.
According to the test result, the guide vane opening of the water turbine at the full-load section has an obvious nonlinear relation to the power of the unit. Compared with the traditional method, the method has clear physical relation, is simple and convenient to realize, and improves the adjustment quality of the primary frequency modulation of the unit.
Claims (10)
1. An online test method for a power transmission coefficient of a turbine set by the opening degree of a guide vane of a water turbine is characterized by comprising the following steps;
(1) automatically judging whether the water turbine generator set operates in a non-vibration area and a non-variable load working condition for the water turbine generator set which operates in a grid-connected mode in an opening closed-loop control mode;
(2) under the current water head, automatically measuring and recording process variable signals such as frequency deviation delta f, guide vane instruction YRef, guide vane opening Y, active power P and the like in the primary frequency modulation action process according to a power change rule, and recording the group of data as a working condition point T1N1 under the current water head;
(3) calculating a power transfer coefficient A1 of a guide vane opening Y pair of the unit under the water head of T1, and a power transfer coefficient A2 of a guide vane opening Y command pair;
(4) automatically calculating and optimizing the confidence coefficient of the original values of the guide vane opening and the transmission coefficient A of the unit power;
(5) adopting automatic fitting calculation to obtain an identification data group of the guide vane opening degree of the working condition point of the measured unit under the current water head and the transmission coefficient A of the unit power;
(6) according to the interval time of 5 continuous effective primary frequency modulation actions, judging the frequency degree of the primary frequency modulation actions, and automatically adjusting and calculating the number of samples;
(7) improving the confidence of a correction coefficient alpha between the opening degree of the guide vane and the active power, and reducing the guide vane fluctuation caused by the change of the correction coefficient alpha;
(8) continuously calculating in the running process of the unit to obtain a data group of correction coefficients alpha of T1N1, T1N2, … and T1Nn under the current water head;
(9) the guide vane opening instruction YRef can be corrected on line through alpha, so that the transmission coefficient A is always more than 1.33 under the current water head full-load working condition;
(10) and when the actually measured water head change amplitude is larger than a preset value M meters, automatically and repeatedly circulating the process to finally obtain a correction coefficient array of the unit under the full-load working conditions under different water heads.
2. The method for testing the power transfer coefficient of the turbine set by the guide vane opening degree of the water turbine as claimed in claim 1, wherein the criterion of the step (1) of the turbine set under the non-variable load working condition comprises the following steps:
1) the deviation between the total plant AGC command and the actual plant power is not more than 2% of the rated plant power;
2) the deviation of the single-machine AGC instruction execution value and the single-machine actual transmission power is not more than 2% of the single-machine rated power.
3. The method for testing the power transfer coefficient of the turbine guide vane opening to the unit on line as claimed in claim 1, wherein the power change rule in the step (2) is the power change rule according to N1% Pe, N2% Pe, … and Nn% Pe.
4. The method for testing the power transfer coefficient of the water turbine set by the guide vane opening degree according to claim 1 is characterized in that in the step (3), the power transfer coefficient A1 by the guide vane opening degree command and the power transfer coefficient A2 by the water head of T1 are respectively and automatically calculated, and the deviation range of the power transfer coefficient A1 and the power transfer coefficient A2 is subjected to validity judgment, so that the jump of the result value caused by the inertia time and the power delay of the water flow in the process of calculating the transfer coefficient A is reduced.
5. The method for on-line testing of the power transfer coefficient of the water turbine guide vane opening degree to the unit as claimed in claim 1, wherein the calculation formula of the unit guide vane opening degree to the power transfer coefficient A1 and the guide vane opening degree instruction to the power transfer coefficient A2 is as follows:
A1＝bp/ep＝(ΔP/Pe)/(ΔY/100) ①
A2＝bp/ep＝(ΔP/Pe)/(ΔYref/100) ②
6. the method for the online test of the power transmission coefficient of the turbine guide vane opening to the unit according to claim 1, wherein the hydroelectric generating set is characterized in that the permanent state slip coefficient bp is not more than 4%, the slip ratio ep is not more than 3%, and bp/ep is 1.33.
7. The method for on-line testing the transmission coefficient of the opening degree of the guide vane of the water turbine to the unit power as claimed in claim 1, wherein the deviation between A1 and A2 meets the condition that the value within 5% of the deviation is a valid value, otherwise, the point is discarded, and the valid data value of the point is used for forming an original value data set of the transmission coefficient A of the opening degree of the guide vane and the unit power.
8. The method for on-line testing of the power transfer coefficient of the water turbine generator set by the guide vane opening degree of the water turbine generator set according to claim 1 is characterized in that in the step (5), an identification data group of the guide vane opening degree of a certain working condition point under the current water head and the power transfer coefficient A of the generator set is automatically fitted, data are automatically and smoothly processed, and sharp points in data transition are reduced.
9. The method for on-line testing the power transfer coefficient of the turbine guide vane opening to the unit according to claim 1, wherein in the step (6), the number of the test samples is automatically adjusted according to the frequency degree of primary frequency modulation action, so that the reliability of the calculation result of the transfer coefficient A is improved.
10. The method for testing the power transmission coefficient of the turbine guide vane opening to the unit according to claim 1, wherein in the step (8), a correction coefficient alpha between the turbine guide vane opening and the active power is calculated according to the principle that A is greater than 1.33 and is satisfied;
α＝1.33/A。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111064367.6A CN113759167B (en) | 2021-09-10 | 2021-09-10 | On-line test method for power transfer coefficient of turbine guide vane opening to unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111064367.6A CN113759167B (en) | 2021-09-10 | 2021-09-10 | On-line test method for power transfer coefficient of turbine guide vane opening to unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113759167A true CN113759167A (en) | 2021-12-07 |
| CN113759167B CN113759167B (en) | 2023-12-22 |
Family
ID=78795014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111064367.6A Active CN113759167B (en) | 2021-09-10 | 2021-09-10 | On-line test method for power transfer coefficient of turbine guide vane opening to unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113759167B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4423594A (en) * | 1981-06-01 | 1984-01-03 | United Technologies Corporation | Adaptive self-correcting control system |
| WO2013170597A1 (en) * | 2012-05-15 | 2013-11-21 | 国网电力科学研究院 | Hydraulic power station surge shaft agc control method |
| CN106327059A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | System and method for calculating theoretical motion electric quantity of primary frequency modulation of hydroelectric generating set |
| CN107066712A (en) * | 2017-03-31 | 2017-08-18 | 国家电网公司 | Hydraulic turbine model parameter identification method and device based on guide vane opening-power characteristic |
| JP2018071100A (en) * | 2016-10-26 | 2018-05-10 | 株式会社中山鉄工所 | Hydropower generation system, hydropower generation method, and hydropower generation program |
| CN109659931A (en) * | 2018-12-19 | 2019-04-19 | 南瑞集团有限公司 | A kind of variable units control method for coordinating based on Interpolation Property of Radial Basis Function model |
| CN111507637A (en) * | 2020-04-22 | 2020-08-07 | 云南电力试验研究院(集团)有限公司 | Parameter modeling and testing method for water turbine and water diversion system for power system stability calculation |
-
2021
- 2021-09-10 CN CN202111064367.6A patent/CN113759167B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4423594A (en) * | 1981-06-01 | 1984-01-03 | United Technologies Corporation | Adaptive self-correcting control system |
| WO2013170597A1 (en) * | 2012-05-15 | 2013-11-21 | 国网电力科学研究院 | Hydraulic power station surge shaft agc control method |
| CN106327059A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | System and method for calculating theoretical motion electric quantity of primary frequency modulation of hydroelectric generating set |
| JP2018071100A (en) * | 2016-10-26 | 2018-05-10 | 株式会社中山鉄工所 | Hydropower generation system, hydropower generation method, and hydropower generation program |
| CN107066712A (en) * | 2017-03-31 | 2017-08-18 | 国家电网公司 | Hydraulic turbine model parameter identification method and device based on guide vane opening-power characteristic |
| CN109659931A (en) * | 2018-12-19 | 2019-04-19 | 南瑞集团有限公司 | A kind of variable units control method for coordinating based on Interpolation Property of Radial Basis Function model |
| CN111507637A (en) * | 2020-04-22 | 2020-08-07 | 云南电力试验研究院(集团)有限公司 | Parameter modeling and testing method for water turbine and water diversion system for power system stability calculation |
Non-Patent Citations (3)
| Title |
|---|
| 付亮;魏加富;黄波;李连丰;: "水电机组一次调频贡献电量影响因素研究", 水利水电技术, no. 08 * |
| 张江滨;李华;谢辉平;: "水电机组一次调频控制系统分析与功能完善", 水力发电学报, no. 06 * |
| 邓磊;周喜军;张文辉;: "用于稳定计算的水轮机调速系统原动机模型", 电力系统自动化, no. 05 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113759167B (en) | 2023-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100545772C (en) | A kind of coal-burning boiler system mixing control method | |
| CN105649875B (en) | Variable pitch control method and device of wind generating set | |
| CN111507637B (en) | Water turbine for stable calculation of electric power system and diversion system parameter modeling and testing method | |
| CN105449722B (en) | A kind of wind power generating set limits Poewr control method | |
| CN109659931A (en) | A kind of variable units control method for coordinating based on Interpolation Property of Radial Basis Function model | |
| CN105914796A (en) | Wind farm active power control method | |
| CN112651180B (en) | Differential equation calculation method for one-pipe multi-machine hydroelectric generating set adjusting system | |
| CN109630354B (en) | Converter control-based fan and synchronous machine cooperative frequency modulation method and system under inertial control | |
| CN111749840A (en) | Automatic intelligent positioning method for main distribution electric neutral position of speed regulator | |
| CN112152234B (en) | Dynamic refined primary frequency modulation control strategy for thermal power generating unit | |
| CN107100795A (en) | A kind of low wind speed apparatus for lower wind generating set MPPT self-adaptation control methods | |
| CN110021942A (en) | A kind of frequency modulation control method based on DCS | |
| CN107346889B (en) | Load reduction optimization model construction method considering primary and secondary frequency modulation and minimum frequency deviation | |
| CN109507869A (en) | A kind of optimization method of the motor control PI parameter suitable for permanent magnet synchronous motor | |
| CN112947076B (en) | Design method of cooperative controller of one-pipe multi-machine hydroelectric generating set | |
| CN113783237A (en) | Energy storage fast frequency modulation control method considering response delay | |
| CN113759167B (en) | On-line test method for power transfer coefficient of turbine guide vane opening to unit | |
| CN109026758A (en) | It is a kind of for controlling the method and device of pumped storage unit pump operating condition start-up course | |
| CN105022286B (en) | A kind of turbine-generator units main servomotor reaction time constant test method | |
| Koşalay et al. | A non-linear model based feed forward flatness control approach to speed governor systems of hydropower plants | |
| Wang et al. | Sliding mode control for maximum wind energy capture of DFIG-based wind turbine | |
| CN114856901A (en) | Method and system for adjusting opening degree of guide vane of speed regulator of water turbine | |
| US20170268478A1 (en) | Method for stabilizing the rotation speed of a hydraulic machine with s-characteristics and installation for converting hydraulic energy into electrical energy | |
| CN117742133A (en) | NSGA-III and TOPSIS-based hydraulic turbine speed regulator PID parameter optimization method | |
| CN114421478B (en) | Closed-loop control method for power of speed regulator of huge hydropower plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |