CN114439677B - 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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- CN114439677B CN114439677B CN202111567517.5A CN202111567517A CN114439677B CN 114439677 B CN114439677 B CN 114439677B CN 202111567517 A CN202111567517 A CN 202111567517A CN 114439677 B CN114439677 B CN 114439677B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004364 calculation method Methods 0.000 title claims abstract description 25
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 230000008054 signal transmission Effects 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Water Turbines (AREA)
Abstract
The invention relates to a speed regulator water head calculation compensation system and a method based on volute water pressure, wherein the method comprises the steps of converting pressure signals and current signals of a volute inlet and outlet of a unit; converting the current signal after converting the pressure of the inlet and outlet of the volute of the unit with a calculated code value; calculating the code value and converting the water head of the speed regulator. The invention reduces the workload of maintenance personnel and simultaneously reduces the risk 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 control of speed regulators of hydropower stations, 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 guide vane electric opening limit of the speed regulator, and has important effects on accurately controlling the safe and stable operation of the water turbine generator.
The speed regulator water head control mode comprises a speed regulator manual water head and an automatic water head, and in normal operation, the speed regulator automatic water head is used as a main part, and the manual water head is used as a standby part.
At present, the automatic water head of the speed regulator in the hydropower industry is generally collected by adopting a direct water-collecting head sensor, and the water head converted by data processing of a water level measuring screen is directly collected by the water level measuring screen, namely, the dam upper water level and the dam lower water level of the hydropower station dam are subjected to difference, and the dam upper water level and the dam lower water level are subjected to data processing to be used as the automatic water head of the speed regulator. The following problems exist:
1. the water level on the dam of the hydropower station and the water level drop below the dam are large, for example, the water level on some dams of the hydropower station is as high as 1245m, the water level below the dam is as low as 991m, the drop is as high as 254m, and large errors are generated when the water level is collected by a straight water collecting head sensor;
2. the water level on the dam of the hydropower station and the water level under the dam have larger fluctuation under the influence of the environment and weather, and larger error is generated when the water level is collected by the direct water collecting head sensor;
3. the dam water level is larger in amplitude according to the number of running units, for example, when some power station full-load period units run all, the dam water level is as high as 998m, when a low-load period single machine runs, the dam water level is as low as 991m, the drop height is as high as 7m, and a larger error is generated by collecting through a direct water collecting head sensor;
4. at present, the water head calculation links of the speed regulator are more, the water level measurement screen data acquired from the direct water head sensor is input into the monitoring system after being processed and calculated, and then the water level measurement screen data is sent to the speed regulator by the monitoring system, so that the multi-ring water head calculation is easy to generate errors caused by uncertain factors, and meanwhile, the equipment cost and the maintenance amount of staff are increased;
5. the dam upper water level and the dam lower water level of the hydropower station are large in drop, the installation position of the direct water-collecting head sensor is special, the transmission distance from the water-head signal measuring source to the speed regulator is long, and the equipment installation and maintenance of workers are not facilitated;
abnormal or inaccurate calculation of the automatic water head of the speed regulator can cause the conditions of machine set startup failure, startup overspeed, grid connection failure, machine set overload and the like, and the safety and stable operation of the water turbine generator set and the power system are seriously threatened.
Disclosure of Invention
In order to solve the problems, the invention provides a speed regulator water head calculation compensation system and a speed regulator water head calculation compensation method based on the 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 speed regulator water head and inaccurate calculation.
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 acquires a first pressure signal P1 and a second pressure signal P2 from the inlet and outlet positions of a volute of a unit;
the processor converts the first pressure signal P1 and the second pressure signal P2 into current signals, and correspondingly marks the pressure signals of 0-Pmax to 4-20 mA; the volute obtains a pressure signal and converts the pressure signal into a current signal, and the process is carried out according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting the current signals after converting the inlet pressure and the outlet pressure of the volute of the unit with a calculated code value, and correspondingly calibrating 4-20 mA to be a calculated code value range theta min-theta max; the current signal is converted into a calculated code value as follows:
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 of the calculated code value theta min-theta max to be 0-beta meters of the water head of the speed regulator; converting the calculated code value into a speed regulator water head according to the following formula:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
further, the first pressure signal P1 and the second pressure signal P2 are both smaller than the maximum volute pressure Pmax.
Further, by reasonably adjusting the sizes of the intermediate adjusting variables θmin and θmax, correction and compensation are carried out on the water heads beta 1 and beta 2 of the speed regulator, and the method is used for compensating the variable water heads caused by errors in the measuring source and the signal transmission process.
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 outlet positions of a volute of the unit;
converting the first pressure signal P1 and the second pressure signal P2 with the current signal, and correspondingly calibrating the pressure signal of 0-Pmax to 4-20 mA; the volute obtains a pressure signal and converts the pressure signal into a current signal, and the process is carried out according to the following formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4；
converting the current signals after converting the inlet pressure and the outlet pressure of the volute of the unit with a calculated code value, and correspondingly calibrating 4-20 mA to be a calculated code value range theta min-theta max; the current signal is converted into a calculated code value as follows:
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 of the calculated code value theta min-theta max to be 0-beta meters of the water head of the speed regulator; converting the calculated code value into a speed regulator water head according to the following formula:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
further, the first pressure signal P1 and the second pressure signal P2 are both smaller than the maximum volute pressure Pmax.
Further, by reasonably adjusting the sizes of the intermediate adjusting variables θmin and θmax, correction and compensation are carried out on the water heads beta 1 and beta 2 of the speed regulator, and the method is used for compensating the variable water heads caused by errors in the measuring source and the signal transmission process.
For a pressure transmitter, its range is set (i.e., pmax is set, not adjustable). For a hydropower station, the water head range is set (i.e. beta is set and is not adjustable). 4-20 mA is the standard value of a non-current signal conversion current signal, namely the international general standard, and cannot be modified. By combining the calculation formulas, the water heads beta 1 and beta 2 are corrected and compensated by reasonably adjusting the intermediate variables theta min and theta max, so as to compensate the change caused by errors in the measuring source and the signal transmission process.
The invention also relates to an electronic device comprising a memory, a processor and a computer program on the memory and executable on the processor, which processor implements the steps of the above 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, implements the steps of the method as described above.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the speed regulator water head converted from the volute inlet and outlet pressure is adopted, so that the speed regulator water head measurement error caused by fluctuation of the water level on the dam and the water level under the dam of the hydropower station is effectively avoided, the speed regulator water head measurement error caused by complex speed regulator water head measurement link and long signal transmission distance is effectively eliminated, and the problem that the water level differential pressure transmitter is difficult to install and maintain is fundamentally solved. The speed regulator water head is corrected and compensated by reasonably adjusting the sizes of the intermediate variables theta min and theta max, and the speed regulator water head is used for compensating a measuring source and a variable water head caused by errors in the signal transmission process. The precision and accuracy of the participation control of the water head of the speed regulator are increased, and meanwhile, the reliability of the operation of the water turbine controlled by the speed regulator is improved. The workload of maintenance personnel is reduced, and the risk of non-stop and overload operation of the unit caused by abnormal water head of the speed regulator and inaccurate calculation is reduced.
Drawings
Fig. 1 is a block diagram of the system of the present invention.
Detailed Description
The following description of the embodiments will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments, all other embodiments that may be made by one of ordinary skill in the art without making any inventive effort are within the scope of the present application.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given a general meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like, as used in this embodiment, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. "upper", "lower", "left", "right", "transverse", and "vertical", etc. are used only with respect to the orientation of the components in the drawings, these directional terms are relative terms, which are used for descriptive and clarity with respect thereto and which may vary accordingly with respect to the orientation in which the components are disposed in the drawings.
The embodiment converts the volute inlet and outlet pressure into a speed regulator water head by depending on the relation between the speed regulator water head and the volute inlet and outlet pressure of the machine set.
As shown in fig. 1, the speed regulator water head calculation compensation system based on the volute water pressure of the embodiment comprises a collector 101, a processor 102 and a display 103, wherein the collector 101 respectively acquires a first pressure signal P1 and a second pressure signal P2 from the inlet and outlet positions of a volute of a unit; the processor 102 performs compensation calculations. The display 103 displays the result.
It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules.
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 a software form.
For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or the like. For another example, when a module above is 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 (centralprocessing unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
In the above embodiments, it may be implemented in whole or in part 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, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. 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)), etc.
Based on the above system, the method of this embodiment includes the following steps:
and (3) converting pressure signals and current signals of the inlet and outlet of the volute of the unit.
1.1 Respectively acquiring pressure signals P1 and P2 from the inlet and outlet positions of the volute of the unit, wherein P1 and P2 are smaller than Pmax, and Pmax is the maximum pressure of the volute;
1.2 Correspondingly calibrating the pressure signal (physical signal) of 0-Pmax to 4-20 mA (current signal);
1.3 A volute acquiring pressure signal is converted into a current signal calculation formula:
I1＝[(20-4)*P1/Pmax]+4；
I2＝[(20-4)*P2/Pmax]+4。
and (2) converting the current signals after converting the inlet pressure and the outlet pressure of the volute of the unit with a calculated code value (intermediate variable).
2.1 Correspondingly calibrating 4-20 mA (current signal) as a calculated code value range theta min-theta max;
2.2 Converting the current signal into a calculated code value calculation formula:
θ1＝[(θmax-θmin)*(I1-4)/(20-4)]+θmin；
θ2＝[(θmax-θmin)*(I2-4)/(20-4)]+θmin。
and (3) calculating the code value and converting the water head of the speed regulator.
3.1 Correspondingly calibrating the calculated code value range theta min-theta max as the water head range 0-beta meter of the speed regulator;
3.2 Converting the calculated code value into a speed regulator water head calculation formula:
β1＝β*(θ1-θmin)/(θmax-θmin)；
β2＝β*(θ2-θmin)/(θmax-θmin)。
head compensation:
for hydroelectric power plants, the volute pressure is mainly caused by head variations, i.e. is not modifiable. 4-20 mA is the standard value of a non-current signal conversion current signal, namely the international general standard, and cannot be modified. By combining the calculation formulas, the adjustment intermediate variables θmin and θmax are reasonably adjusted, so that the adjustment intermediate variables are corrected and compensated for the adjustment speed heads beta 1 and beta 2, and the adjustment intermediate variables are used for compensating the variable heads caused by errors in the measuring source and the signal transmission process.
Optionally, the embodiment of the present application further provides a storage medium, where instructions are stored, when the instructions are executed on a computer, cause the computer to perform the method of the embodiment as shown in the foregoing.
Optionally, the embodiment of the present application further provides a chip for executing the instruction, where the chip is used to perform the method of the foregoing embodiment.
The present application also provides a program product, which comprises a computer program stored in a storage medium, from which at least one processor can read the computer program, and the method of the above embodiment can be implemented when the at least one processor executes the computer program.
One practical measurement procedure for this embodiment is as follows:
the range of the pressure transmitter is 0-4 MPa (pmax=4 MPa), θmin=6503, θmax=32767, β=400 m, p1=2 MPa, p2=2.1 MPa, and water heads β1 and β2 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 follows that the system and method of the present embodiment:
1. and realizing analog quantity control redundancy configuration.
Corresponding speed regulator water heads are calculated respectively by obtaining the inlet pressure and the outlet pressure of the volute, so that redundant configuration of analog control signals of the speed regulator water heads is realized.
2. The reliability of the participation control of the speed regulator water head is increased.
The speed regulator water head converted by adopting the volute inlet and outlet pressure solves the problem that the speed regulator water head measurement error is caused by the fluctuation of the upper water level and the lower water level of the dam of the hydropower station, the complex measuring link of the speed regulator water head and the long signal transmission distance, thereby increasing the reliability of the participation control of the speed regulator water head.
3. The precision of the participation control of the water head of the speed regulator is increased.
The intermediate variables theta min and theta max are reasonably adjusted, so that the speed regulator water head is corrected and compensated, and the speed regulator water head is used for compensating a measuring source and a variable water head caused by errors in the signal transmission process, so that the accuracy of participation control of the speed regulator water head is improved.
4. The water head measuring source is reasonably changed, and the problems that the direct water head sensor is not easy to install and maintain are fundamentally solved.
The dam upper water level and the dam lower water level drop of the hydropower station are large, the installation position of the direct water-collecting head sensor is special, the transmission distance from a water head signal measuring source to the speed regulator is long, the equipment installation and maintenance of workers are not facilitated, and the problem that the direct water-collecting head sensor is difficult to install and maintain is fundamentally solved by reasonably changing the water head measuring source.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. 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 outlet positions of a volute of the unit;
the first pressure signal P1 and the second pressure signal P2 are converted with the current signal,
correspondingly calibrating the pressure signal of 0-Pmax to be 4-20 mA; the volute obtains a pressure signal and converts the pressure signal into a current signal, and the process is carried out according to the following formula:
I1=[（20-4）*P1/Pmax]+4；
I2=[（20-4）*P2/Pmax]+4；
converting the current signals after converting the inlet pressure and the outlet pressure of the volute of the unit with calculated code values, and correspondingly calibrating 4-20 mA to be a calculated code value range theta min-theta max; the current signal is converted into a calculated code value as follows:
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 of the calculated code value theta min-theta max to be 0-beta meter of the water head of the speed regulator; converting the calculated code value into a speed regulator water head according to the following formula:
β1=β*（θ1-θmin）/（θmax-θmin）；
β2=β*（θ2-θmin）/（θmax-θmin）；
the first pressure signal P1 and the second pressure signal P2 are both smaller than the maximum volute pressure Pmax;
and the intermediate variables theta min and theta max are reasonably adjusted, so that the heads beta 1 and beta 2 of the speed regulator are corrected and compensated, and the method is used for compensating a measuring source and a variable head caused by errors in the signal transmission process.
2. 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 acquires a first pressure signal P1 and a second pressure signal P2 from the inlet and outlet positions of a volute of the unit; the processor performs the calculation according to the method of claim 1.
3. An electronic device, characterized in that: computer program comprising a memory, a processor and a computer program running on the memory, said processor implementing the steps of the method according to claim 1 when said computer program is executed.
4. A non-transitory computer readable storage medium characterized by: on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to claim 1.
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