CN114439677A - Speed regulator water head calculation compensation system and method based on volute water pressure - Google Patents
Speed regulator water head calculation compensation system and method based on volute water pressure Download PDFInfo
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- 238000004364 calculation method Methods 0.000 title claims abstract description 25
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
- F03B15/14—Regulating, i.e. acting automatically by or of water level
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/02—Casings
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
-
- 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
Abstract
The invention relates to a speed regulator water head calculation compensation system and method based on volute water pressure, wherein the method comprises the steps of converting pressure signals of an inlet and an outlet of a volute of a unit with current signals; converting current signals and calculated code values after the pressure conversion of the inlet and the outlet of the volute of the unit; and calculating code value and governor head conversion. The invention reduces the workload of maintenance personnel and simultaneously reduces the risks of non-stop and overload operation of the unit caused by abnormal water head of the speed regulator and inaccurate calculation.
Description
Technical Field
The invention belongs to the field of hydropower station speed regulator control, and particularly relates to a speed regulator water head calculation compensation system and method based on volute water pressure.
Background
The water head of the speed regulator is a basic parameter of the water turbine, is mainly used for calculating the no-load opening degree, the no-load opening limit and the electric opening limit of the guide vane of the speed regulator, and has an important effect on the accurate control of the safe and stable operation of the hydraulic generator by the speed regulator.
The speed regulator water head control mode has two modes of speed regulator artificial water head and speed regulator automatic water head, and when the speed regulator water head control mode is normally operated, the speed regulator automatic water head is used as main mode, and the artificial water head is used as standby mode.
At present, the automatic water head of a speed regulator in the hydropower industry generally adopts a direct water head sensor for acquisition, the water head after data processing and conversion of a water level measuring screen directly acquires the dam upper water level and the dam lower water level of a dam of a hydropower station, the dam upper water level and the dam lower water level are subjected to difference, and the difference is used as the automatic water head of the speed regulator after data processing. There are problems as follows:
1. the difference between the dam upper water level and the dam lower water level of the hydropower station dam is large, for example, the dam upper water level of some hydropower stations is as high as 1245m, the dam lower water level is as low as 991m, and the difference is as high as 254m, and a large error is generated by collecting through a direct water sampling head sensor;
2. under the influence of environment and weather, the fluctuation of the upper water level and the lower water level of a dam of a hydropower station is large, and a large error is generated by collecting through a direct water sampling head sensor;
3. the variation of the water level under the dam is larger along with the difference of the number of the running units, for example, the water level under the dam is as high as 998m when all the running units of some power stations run in the full-load period, the water level under the dam is as low as 991m when a single machine runs in the low-load period, the fall is as high as 7m, and a large error is generated by collecting through a direct water sampling head sensor;
4. at present, the speed regulator has more water head calculation links, data collected by a direct water head sensor and a water level measuring screen are input into a monitoring system after being processed and calculated, and then are issued to the speed regulator by the monitoring system, errors caused by uncertain factors are easily generated by multi-link water head calculation, and meanwhile, the equipment cost and the maintenance amount of workers are increased;
5. the difference between the dam upper water level and the dam lower water level of the hydropower station dam is large, the installation position of a direct mining head sensor is special, the transmission distance from a water head signal measurement source to a speed regulator is long, and equipment installation and maintenance are not facilitated for workers;
the abnormal automatic water head or inaccurate calculation of the speed regulator can cause the conditions of unit startup failure, startup overspeed, grid connection failure, unit overload and the like, and can cause serious threats to the safe and stable operation of the water-turbine generator set and the power system.
Disclosure of Invention
In order to solve the problems, the invention provides a speed regulator water head calculation compensation system and method based on volute water pressure, which reduce the workload of maintenance personnel and simultaneously reduce the risks of non-stop and overload operation of a unit caused by abnormal water head and inaccurate calculation of a speed regulator.
The technical scheme of the invention is as follows:
a speed regulator water head calculation compensation system based on volute water pressure comprises a collector and a processor, wherein the collector respectively obtains a first pressure signal P1 and a second pressure signal P2 from the inlet and the outlet of a volute of a unit;
the processor converts the first pressure signal P1 and the second pressure signal P2 with the current signal, and correspondingly marks the pressure signals from 0 to Pmax as 4 to 20 mA; converting the pressure signal obtained by the volute into a current signal according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting a current signal and a calculated code value after the pressure of an inlet and an outlet of the unit volute is converted, and correspondingly calibrating 4-20 mA to be the calculated code value range theta min-theta max; converting the current signal into a calculated code value according to the following formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin；
converting the calculated code value and the water head of the speed regulator, and correspondingly calibrating the range theta min-theta max of the calculated code value as the range 0-beta meters of the water head of the speed regulator; converting the calculated code value into a governor head, as follows:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
further, both the first pressure signal P1 and the second pressure signal P2 are less than the volute maximum pressure Pmax.
Furthermore, the adjustment intermediate variables theta min and theta max are reasonably adjusted to correct and compensate the regulator water heads beta 1 and beta 2, so that the variable water heads caused by errors in the measurement source and the signal transmission process are compensated.
The invention also relates to a speed regulator water head calculation compensation method based on the volute water pressure, which comprises the following steps:
respectively acquiring a first pressure signal P1 and a second pressure signal P2 from the inlet and the outlet positions of the volute of the unit;
converting the first pressure signal P1 and the second pressure signal P2 with a current signal, and correspondingly calibrating the pressure signals from 0 to Pmax to be 4 to 20 mA; converting the pressure signal obtained by the volute into a current signal according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting a current signal and a calculated code value after the pressure of an inlet and an outlet of the unit volute is converted, and correspondingly calibrating 4-20 mA to be the calculated code value range theta min-theta max; converting the current signal into a calculated code value according to the following formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin；
converting the calculated code value and the water head of the speed regulator, and correspondingly calibrating the range theta min-theta max of the calculated code value as the range 0-beta meters of the water head of the speed regulator; converting the calculated code value into a governor head, as follows:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
further, both the first pressure signal P1 and the second pressure signal P2 are less than the volute maximum pressure Pmax.
Furthermore, the adjustment intermediate variables theta min and theta max are reasonably adjusted to correct and compensate the regulator water heads beta 1 and beta 2, so that the variable water heads caused by errors in the measurement source and the signal transmission process are compensated.
For the pressure transmitter, the measuring range is set (namely Pmax is set and is not adjustable). For a hydroelectric power plant, its head range is set (i.e. β is set, not adjustable). 4-20 mA is a standard value of a non-current signal conversion current signal, namely an international universal standard, and cannot be modified. By combining the calculation formulas, the correction compensation is carried out on the water heads beta 1 and beta 2 by reasonably adjusting the intermediate variables theta min and theta max, and the correction compensation is used for compensating the change caused by errors in the measurement source and the signal transmission process.
The invention also relates to an electronic device comprising a memory, a processor and a computer program running on the memory and on the processor, wherein the processor implements the steps of the method when executing the computer program.
The invention also relates to a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as described above.
Compared with the prior art, the invention has the following beneficial effects:
the invention effectively avoids the measurement error of the water head of the speed regulator caused by the fluctuation of the water level of the hydropower station dam and the water level of the dam by converting the pressure of the inlet and the outlet of the volute into the water head of the speed regulator, effectively eliminates the measurement error of the water head of the speed regulator caused by the complicated measurement link and the long signal transmission distance of the water head of the speed regulator, and fundamentally solves the problems that the water head pressure transducer is difficult to install and maintain. The water head of the governor is corrected and compensated by reasonably adjusting the intermediate variables theta min and theta max, and the water head is used for compensating the varying water head caused by errors in the measurement source and the signal transmission process. The accuracy and the precision of the water head of the speed regulator participating in the control are increased, and the reliability of the speed regulator controlling the operation of the water turbine is improved. The workload of maintenance personnel is reduced, and meanwhile, the risks of non-stop and overload operation of the unit caused by abnormal water head of the speed regulator and inaccurate calculation are reduced.
Drawings
Fig. 1 is a block diagram of the architecture of the system of the present invention.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples without making any creative effort, shall fall within the protection scope of the present application.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art. The use of "first," "second," and similar terms in the present embodiments does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "Upper," "lower," "left," "right," "lateral," "vertical," and the like are used solely in relation to the orientation of the components in the figures, and these directional terms are relative terms that are used for descriptive and clarity purposes and that can vary accordingly depending on the orientation in which the components in the figures are placed.
The embodiment converts the inlet and outlet pressures of the volute into the water head of the speed regulator by depending on the relation between the water head of the speed regulator and the inlet and outlet pressures of the volute of the unit.
As shown in fig. 1, the governor head calculation compensation system based on volute water pressure of the present embodiment includes a collector 101, a processor 102 and a display 103, wherein the collector 101 obtains a first pressure signal P1 and a second pressure signal P2 from the inlet and outlet positions of the set volute respectively; the processor 102 performs compensation calculations. The display 103 displays the results.
It should be noted that the division of each module of the above apparatus is only a logical division, and all or part of the actual implementation may be integrated into one physical entity or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware.
The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a readable storage medium or transmitted from one readable storage medium to another readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Based on the above system, the method of the embodiment includes the following steps:
and (1) converting pressure signals and current signals of an inlet and an outlet of the volute of the unit.
1.1) obtaining pressure signals P1 and P2 from the inlet and outlet positions of the set volute respectively, wherein P1 and P2 are both smaller than Pmax, wherein Pmax is the maximum pressure of the volute;
1.2) correspondingly calibrating the pressure signal (physical signal) of 0-Pmax to be 4-20 mA (current signal);
1.3) converting the volute acquisition pressure signal into a current signal calculation formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4。
and (2) converting the current signal and the calculated code value (intermediate variable) after the pressure conversion of the inlet and the outlet of the volute of the unit.
2.1) correspondingly calibrating 4-20 mA (current signals) into a calculation code value range theta min-theta max;
2.2) converting the current signal into a calculation code value calculation formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin。
and (3) calculating code value and converting the code value and the water head of the speed regulator.
3.1) correspondingly marking the range theta min-theta max of the calculated code value as the range of the water head of the speed regulator from 0 meter to beta meter;
3.2) converting the calculated code value into a governor head calculation formula:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
water head compensation:
for hydroelectric power plants, the volute pressure is mainly caused by head variations, i.e. is not modifiable. 4-20 mA is a standard value of a non-current signal conversion current signal, namely an international universal standard, and cannot be modified. By combining the calculation formulas, the correction compensation is carried out on the water heads beta 1 and beta 2 of the speed regulator by reasonably adjusting the intermediate variables theta min and theta max, and the correction compensation is used for compensating the variable water heads caused by errors in the measurement source and the signal transmission process.
Optionally, an embodiment of the present application further provides a storage medium, where instructions are stored, and when the storage medium is run on a computer, the storage medium causes the computer to execute the method according to the embodiment described above.
Optionally, an embodiment of the present application further provides a chip for executing the instruction, where the chip is configured to execute the method in the foregoing illustrated embodiment.
The embodiments of the present application also provide a program product, where the program product includes a computer program, where the computer program is stored in a storage medium, and at least one processor can read the computer program from the storage medium, and when the at least one processor executes the computer program, the at least one processor can implement the method of the above-mentioned embodiments.
One practical measurement procedure of this embodiment is as follows:
the measuring range of the pressure transmitter is 0-4 MPa (Pmax is 4MPa), theta min is 6503, theta max is 32767, beta is 400m, P1 is 2MPa, P2 is 2.1MPa, and water heads beta 1 and beta 2 are calculated: the calculation process is as follows:
(1)I1＝[(20-4)*P1/Pmax]+4mA＝[(20-4)*2/4]+4＝12mA；
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin＝[(32767-6503)*(12-4)/(20-4)]+6503＝19635；
β1＝β*(θ1-θmin)/(θmax-θmin)＝400*(19635-6503)/(32767-6503)m＝200m。
(2)I2＝[(20-4)*P2/Pmax]+4mA＝[(20-4)*2.1/4]+4＝12.4mA；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin＝[(32767-6503)*(12.4-4)/(20-4)]+6503＝20291.6；
β2＝β*(θ2-θmin)/(θmax-θmin)＝400*(20291.6-6503)/(32767-6503)m＝210m。
it can be seen that the system and method of the present embodiment:
1. and realizing the control of redundant configuration by analog quantity.
Corresponding speed regulator water heads are respectively calculated by acquiring the pressure of the inlet and the outlet of the volute, so that redundant configuration of analog quantity control signals of the speed regulator water heads is realized.
2. The reliability of the speed regulator water head participating in the control is increased.
The water level fluctuation of the dam upper water level and the dam lower water level of the hydropower station, the complex measurement link of the water head of the speed regulator and the long signal transmission distance cause the measurement error of the water head of the speed regulator, thereby increasing the reliability of the participation control of the water head of the speed regulator.
3. The accuracy of the speed regulator water head participating in the control is increased.
The water head of the speed regulator is corrected and compensated by reasonably adjusting the adjusting intermediate variables theta min and theta max, and the corrected and compensated water head is used for compensating the varying water head caused by errors in a measurement source and a signal transmission process, so that the accuracy of the participation control of the water head of the speed regulator is improved.
4. The water head measuring source is reasonably changed, and the problems that a straight water head sensor is not easy to install and maintain are fundamentally solved.
The difference between the upper water level of the dam and the lower water level of the dam of the hydropower station is large, the installation position of the direct mining water head sensor is special, the transmission distance from a water head signal measurement source to the speed regulator is long, the installation and maintenance of equipment by workers are not facilitated, and the problem that the direct mining water head sensor is not easy to install and maintain is fundamentally solved by reasonably changing the water head measurement source.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A speed regulator water head calculation compensation system based on volute water pressure is characterized in that: the device comprises a collector and a processor, wherein the collector respectively obtains a first pressure signal P1 and a second pressure signal P2 from the inlet and the outlet of a volute of a unit;
the processor converts the first pressure signal P1 and the second pressure signal P2 with the current signal, and correspondingly marks the pressure signals from 0 to Pmax as 4 to 20 mA; converting the pressure signal obtained by the volute into a current signal according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting a current signal and a calculated code value after the pressure of an inlet and an outlet of the unit volute is converted, and correspondingly calibrating 4-20 mA to be the calculated code value range theta min-theta max; converting the current signal into a calculated code value according to the following formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin；
converting the calculated code value and the water head of the speed regulator, and correspondingly calibrating the range theta min-theta max of the calculated code value as the range 0-beta meters of the water head of the speed regulator; converting the calculated code value into a governor head, as follows:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
2. the system of claim 1, wherein: the first and second pressure signals P1 and P2 are each less than the volute maximum pressure Pmax.
3. The system of claim 1, wherein: the water heads beta 1 and beta 2 of the speed regulator are corrected and compensated by reasonably adjusting the intermediate variables theta min and theta max, and the corrected and compensated water heads are used for compensating the variable water heads caused by errors in the measurement source and the signal transmission process.
4. A speed regulator water head calculation compensation method based on volute water pressure is characterized in that: the method comprises the following steps:
respectively acquiring a first pressure signal P1 and a second pressure signal P2 from the inlet and the outlet positions of the volute of the unit;
converting the first pressure signal P1 and the second pressure signal P2 with a current signal, and correspondingly calibrating the pressure signals from 0 to Pmax to be 4 to 20 mA; converting the pressure signal obtained by the volute into a current signal according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting a current signal and a calculated code value after the pressure at the inlet and the outlet of the volute of the unit is converted, and correspondingly calibrating 4-20 mA to be in a calculated code value range theta min-theta max; converting the current signal into a calculated code value according to the following formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin；
converting the calculated code value and the water head of the speed regulator, and correspondingly calibrating the range theta min-theta max of the calculated code value as the range 0-beta meters of the water head of the speed regulator; converting the calculated code value into a governor head, as follows:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
5. the method of claim 4, wherein: the first and second pressure signals P1 and P2 are each less than the volute maximum pressure Pmax.
6. The method of claim 4, wherein: the water heads beta 1 and beta 2 of the speed regulator are corrected and compensated by reasonably adjusting the intermediate variables theta min and theta max, and the corrected and compensated water heads are used for compensating the variable water heads caused by errors in the measurement source and the signal transmission process.
7. An electronic device comprising a memory, a processor, and a computer program that is executable on the memory and on the processor, wherein: the processor, when executing the computer program, realizes the steps of the method of any of the preceding claims 4 to 6.
8. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that: the computer program, when being executed by a processor, realizes the steps of the method as claimed in any one of claims 4 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111567517.5A CN114439677B (en) | 2021-12-20 | 2021-12-20 | Speed regulator water head calculation compensation system and method based on volute water pressure |
Applications Claiming Priority (1)
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