A method, device and electronic equipment for calculating full characteristic curves of a model of an impulse water turbine

Abstract

The application discloses a kind of calculation method, device and electronic equipment of the full characteristic curve of impulse water turbine model, method includes, obtains the nozzle flow characteristic curve of different working nozzle quantity of impulse water turbine, comprehensive operating characteristic curve, runaway characteristic curve, wind resistance curve and water turbine parameter;Select working nozzle quantity, get corresponding impulse water turbine unit flow and the relationship curve of nozzle opening, deflector opening, nozzle jet diameter;Based on the selected working nozzle quantity, get the relationship curve of impulse water turbine unit torque and unit speed, unit flow, output impulse water turbine model full characteristic curve.The application can overcome the problem that the existing technology is too simple, and the comprehensive operating characteristic curve based on physical model test cannot fully reflect the dynamic characteristics of impulse water turbine full working condition.

Description

Technical Field

[0001] This invention belongs to the field of hydropower and power system modeling technology, specifically relating to a method, device, and electronic equipment for calculating the full characteristic curve of an impulse turbine model. Background Technology

[0002] In steep terrains with high altitudes and high water heads, impulse turbines convert kinetic energy by jetting water into energy through the impact of the runner, making them particularly suitable for such ultra-high head hydropower development scenarios. With the increasing frequency of long-distance, high-capacity power exchange, the dynamic security issues of power systems are becoming increasingly prominent, necessitating in-depth and detailed research on the prime mover model of impulse turbine units to meet the needs of dynamic simulation analysis of power systems.

[0003] In the modeling and simulation research of hydroelectric generator sets, conventional turbine models often only provide parameters for the optimal operating condition. The comprehensive operating characteristic curves obtained from physical model tests cannot well depict the dynamic transition processes of the turbine, such as no-load, start-up, and load shedding. Therefore, in order to simulate and analyze these transition processes, it is necessary to select a reasonable curve extrapolation method to establish the full characteristic curves of the impulse turbine model to meet the simulation accuracy of the full operating condition. Summary of the Invention

[0004] The purpose of this invention is to provide a method, apparatus, and electronic device for calculating the full characteristic curve of an impulse turbine model, which can overcome the problems in the prior art where the simulation model of the impulse turbine is too simple and the comprehensive operating characteristic curve based on the physical model test cannot fully reflect the dynamic characteristics of the impulse turbine under all operating conditions.

[0005] To achieve the above objectives, the solution of the present invention is:

[0006] A method for calculating the full characteristic curve of an impulse turbine model, including:

[0007] Obtain nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for impulse turbines with different numbers of working nozzles;

[0008] By selecting the number of working nozzles, the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter are obtained.

[0009] Based on the selected number of working nozzles, the relationship curves between the unit torque, unit speed, and unit flow rate of the impulse turbine are obtained, and the full characteristic curve of the impulse turbine model is output.

[0010] This includes obtaining nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for impulse turbines with different numbers of working nozzles, including...

[0011] The number of working nozzles of the impulse turbine is set as follows: Experiments were conducted based on an impulse turbine model to obtain the corresponding turbine parameters, including nozzle opening. Deflector opening Maximum jet diameter of nozzle Nozzle working jet diameter Gravitational acceleration Unit flow Unit speed and unit torque ;

[0012] According to the corresponding number of working nozzles The test data were used to fit the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve.

[0013] Among them, by selecting the number of working nozzles, the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter are obtained, including...

[0014] Select the number of working nozzles ,according to The flow characteristic curves of the impact turbine nozzles under each working nozzle were obtained by constructing a polynomial curve fitting calculation to obtain the unit flow characteristic coefficient. ,in , , , for The relationship curve parameters between the opening degree and the unit flow characteristic coefficient of each working nozzle;

[0015] Based on the deflector's operating status, the influence coefficient of the deflector on the nozzle's working flow rate is established as follows:

[0016]

[0017] Based on the operating status of the nozzle and deflector, combined with the unit flow characteristic coefficient The number of working nozzles is obtained. Unit flow rate of impulse turbines at full opening ,

[0018]

[0019] in This refers to the rated value per unit flow rate.

[0020] The output of the full characteristic curves of the impulse turbine model includes...

[0021] Select the number of working nozzles Extrapolating the flight characteristic curves respectively, we obtain... The runaway characteristic curve of a single working nozzle at full opening range;

[0022] Select the number of working nozzles The full characteristic curve is divided into high efficiency zone I, high speed zone II, low speed zone III, low opening zone IV, and braking zone V. Based on the comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve, the three-point Lagrange or parabolic interpolation method is used to perform curve fitting or extension to obtain the full characteristic curve of the impulse turbine model.

[0023] The flight characteristic curve is extrapolated using the following numerical fitting formula.

[0024]

[0025] in, , All for The parameters of the unit flow rate-unit rotation speed relationship curve for each working nozzle are obtained by fitting the runaway characteristic curve data in the large opening range.

[0026] The formula for calculating the high-efficiency I zone is as follows:

[0027]

[0028] in, To calculate the turbine efficiency, based on the comprehensive operating characteristic curve, the three-point Lagrange interpolation formula or the parabolic interpolation formula is used to calculate the specified unit speed. Unit flow The efficiency of the water turbine .

[0029] The calculation methods for the high-speed zone II and low-speed zone III are as follows:

[0030] Select a unit flow rate The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit flow Recalculate by interpolation until the unit torque in all high-speed II and low-speed III regions is obtained. .

[0031] The method for calculating the low-opening IV zone is as follows:

[0032] Select a certain unit speed The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit speed Recalculate by interpolation until the unit torque of all low-opening IV zones is obtained. .

[0033] The method for calculating the braking V-zone is as follows:

[0034] Based on the turbine's air resistance curve, a specific unit flow rate is selected. The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit flow Recalculate by interpolation until the unit torque of all braking V zones is obtained. .

[0035] A device for calculating the full characteristic curve of an impulse turbine model, comprising:

[0036] The curve processing module is configured to acquire nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for different numbers of working nozzles of the impulse turbine.

[0037] The first calculation module is configured to select the number of working nozzles and obtain the corresponding relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter.

[0038] The second calculation module is configured to obtain, based on the selected number of working nozzles, the relationship curves between the unit torque of the impulse turbine and the unit speed and unit flow rate; and,

[0039] The output module is configured to output the full characteristic curves of the impulse turbine model.

[0040] An electronic device includes a memory and a processor, wherein the memory stores program code that can run on the processor, and when the program code is executed by the processor, it implements the method for calculating the full characteristic curve of the impulse turbine model as described above.

[0041] Compared with the prior art, the beneficial effects of the present invention after adopting the above solution are as follows:

[0042] (1) In the early stage of power plant construction, based on the test data of the physical model of the impulse turbine, the full-opening flow characteristics and full-condition torque characteristics of the impulse turbine can be quickly established for simulation calculation of the dynamic transient process of the impulse turbine.

[0043] (2) This invention provides a data-driven modeling method for impulse turbines. After the power station is put into operation, the model is iteratively optimized by combining measured data, which provides model support for subsequent optimization of impulse turbine control strategies and accident inversion. Attached Figure Description

[0044] Figure 1 This is a schematic diagram illustrating the calculation steps of the full characteristic curve of the impulse turbine model involved in the embodiments of the present invention;

[0045] Figure 2 This is a schematic diagram of the flow characteristics of the nozzle of an impulse turbine according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the full operating condition zoning of the impulse turbine involved in the embodiments of the present invention;

[0047] Figure 4 This is a schematic diagram of the full characteristics of an impulse turbine according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the impulse turbine model full characteristic curve calculation device provided by the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0050] This invention provides a method for calculating the full characteristic curve of an impulse turbine model, comprising the following steps:

[0051] Obtain the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, wind resistance curve and turbine parameters for different numbers of working nozzles of the impulse turbine, and define the physical quantities involved in the calculation.

[0052] Select the number of working nozzles and calculate the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter.

[0053] Select the number of working nozzles, calculate the relationship curves between unit torque, unit speed, and unit flow rate of the impulse turbine, and output the full characteristic curve of the impulse turbine.

[0054] The parameters of the impulse turbine and the required physical quantities include: the number of working nozzles. Nozzle opening Deflector opening Maximum jet diameter of nozzle Nozzle working jet diameter Gravitational acceleration Unit flow Unit speed Unit torque .

[0055] The method for calculating the unit flow rate of the impulse turbine includes:

[0056] Select the number of working nozzles ,according to The flow characteristic curves of the impact turbine nozzles under each working nozzle were obtained by constructing a polynomial curve fitting calculation to obtain the unit flow characteristic coefficient. ,in , , , for The relationship curve parameters between the opening degree and the unit flow characteristic coefficient of each working nozzle;

[0057] Based on the operating status of the nozzle and deflector, combined with the unit flow characteristic coefficient The number of working nozzles is obtained. Unit flow rate of impulse turbine under full opening conditions The formula is as follows:

[0058]

[0059] in This is the influence coefficient of the nozzle and deflector operating status on the unit flow rate. This refers to the rated value per unit flow rate.

[0060] The method for calculating the full characteristic curve of the impulse turbine includes:

[0061] Select the number of working nozzles Extrapolating the flight characteristic curves respectively, we obtain... The runaway characteristic curve of a single working nozzle at full opening range;

[0062] Select the number of working nozzles The full characteristic curve is divided into high-efficiency zone I, high-speed zone II, low-speed zone III, low-opening zone IV, and braking zone V. Based on the comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve, the three-point Lagrange or parabolic interpolation method is used to perform curve fitting or extension to obtain the full characteristic curve of the impulse turbine.

[0063] The calculation of the full characteristic curve of the impulse turbine includes a numerical fitting formula for extending the full opening range of the runaway characteristic curve as follows:

[0064]

[0065] in , for The parameters of the unit flow rate-unit rotation speed relationship curve for each working nozzle are obtained by fitting the runaway characteristic curve data in the large opening range.

[0066] The calculation formula for the full characteristic curve of the impulse turbine, specifically for the high-efficiency zone I, is as follows:

[0067]

[0068] in To calculate the turbine efficiency, based on the comprehensive operating characteristic curve, the three-point Lagrange interpolation formula or the parabolic interpolation formula is used to calculate the specified unit speed. Unit flow The efficiency of the water turbine .

[0069] The calculation method for the full characteristic curve of the impulse turbine, specifically for the high-speed II region and the low-speed III region, is as follows:

[0070] Select a unit flow rate The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change unit flow Recalculate by interpolation until the unit torque in all high-speed II and low-speed III regions is obtained. .

[0071] The calculation method for the full characteristic curve of the impulse turbine, specifically the calculation of the low-opening IV region, is as follows:

[0072] Select a certain unit speed The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change the unit speed Recalculate by interpolation until the unit torque of all low-opening IV zones is obtained. .

[0073] The calculation method for the braking V-zone of the impulse turbine, as described in the full characteristic curve calculation, is as follows:

[0074] Based on the turbine's air resistance curve, a specific unit flow rate is selected. The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change unit flow Recalculate by interpolation until the unit torque of all braking V zones is obtained. .

[0075] The technical solution and beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] See Figure 1 The method for calculating the full characteristic curve of an impulse turbine model provided in this embodiment of the invention includes the following steps:

[0077] S100 obtains the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, wind resistance curve, and turbine parameters of the impulse turbine under different numbers of working nozzles, and defines the physical quantities involved in the calculation.

[0078] As a preferred technical solution of the present invention, in step S100, the parameters of the impulse turbine and the required defined physical quantity are the maximum jet diameter of the nozzle. Gravitational acceleration Unit speed Unit flow Unit torque Nozzle opening Deflector opening Nozzle working jet diameter Number of working nozzles .

[0079] In this embodiment, a typical 6-jet, 6-bend impulse turbine is used as an example. Based on the number of nozzles in operation, there are generally five operating conditions: 1, 2, 3, 4, and 6. Through the impulse turbine model test report, the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve for these five operating conditions can be obtained by fitting the test data for each condition.

[0080] S200, select the number of working nozzles, and calculate the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter.

[0081] As a preferred technical solution of the present invention, in step S200, such as Figure 2 Schematic diagram of nozzle flow characteristics of an impulse turbine, selection of the number of working nozzles. ,according to The flow characteristic curves of the impingement turbine nozzles under each working nozzle were obtained by constructing a polynomial curve fitting calculation without considering the deflector condition, and the unit flow characteristic coefficient was calculated as follows: ,in , , , for The relationship curve parameters between the opening degree and the unit flow characteristic coefficient of each working nozzle.

[0082] As a preferred embodiment of the present invention, in step S200, the influence coefficient of the deflector on the nozzle working flow rate is established based on the deflector's operating state.

[0083]

[0084] in, The values ​​are calculated based on the structural relationship between the deflector and the nozzle; the values ​​need to be within... Within the specified range, the physical characteristics that satisfy the influence of the deflector on the nozzle's working flow rate are met.

[0085] As a preferred embodiment of the present invention, in step S200, the number of working nozzles is selected. Based on the operating status of the nozzle and deflector, combined with the unit flow characteristic coefficient The number of working nozzles is obtained. Unit flow rate of impulse turbine under full opening conditions The formula is as follows:

[0086]

[0087] in This refers to the rated value per unit flow rate.

[0088] S300: Select the number of working nozzles, calculate the relationship curves between unit torque, unit speed, and unit flow rate of the impulse turbine, and output the full characteristic curve of the impulse turbine.

[0089] As a preferred embodiment of the present invention, in step S300, the number of working nozzles is selected. ,like Figure 3 This diagram illustrates the full-condition zoning of an impulse turbine. For different operating conditions, the full characteristic curve is divided into four zones: High Efficiency Zone I, High Speed ​​Zone II, Low Speed ​​Zone III, Low Opening Zone IV, and Braking Zone V. Data for High Efficiency Zone I is derived from the comprehensive operating characteristic curve, while data for section AB is derived from the runaway characteristic curve. (Unit speed...) The data on the vertical axis comes from the wind resistance curve. Based on the comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve, the three-point Lagrange or parabolic interpolation method is used to perform curve fitting or extension to obtain the full characteristic curve of the impulse turbine.

[0090] As a preferred technical solution of the present invention, in step S300, the numerical fitting formula for the extension of the full opening range of the runaway characteristic curve in the calculation of the full characteristic curve of the impulse turbine is as follows:

[0091]

[0092] in , All for The parameters of the unit flow rate-unit rotational speed relationship curve for each working nozzle. For example... Figure 3 In the process, the runaway characteristic curve OAB of the turbine in the large opening range is obtained by extending the curve outward from the AB segment of the turbine runaway characteristic curve.

[0093] As a preferred technical solution of the present invention, in step S300, the calculation formula for the high-efficiency zone I in the calculation of the full characteristic curve of the impulse turbine is as follows:

[0094]

[0095] in For turbine efficiency, the three-point Lagrange interpolation formula or parabolic interpolation formula is used to calculate the specified unit speed based on the comprehensive operating characteristic curve. Unit flow The efficiency of the water turbine .

[0096] As a preferred technical solution of the present invention, in step S300, the calculation method for the high-speed II region and the low-speed III region in the calculation of the full characteristic curve of the impulse turbine is as follows:

[0097] Select a unit flow rate The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change unit flow Recalculate by interpolation until the unit torque in all high-speed II and low-speed III regions is obtained. .

[0098] As a preferred technical solution of the present invention, in step S300, the calculation method for the low opening degree IV zone in the calculation of the full characteristic curve of the impulse turbine is as follows:

[0099] Select a certain unit speed The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change the unit speed Recalculate by interpolation until the unit torque of all low-opening IV zones is obtained. .

[0100] As a preferred technical solution of the present invention, in step S300, the method for calculating the braking V-zone in the calculation of the full characteristic curve of the impulse turbine is as follows:

[0101] Based on the turbine's air resistance curve, a specific unit flow rate is selected. The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque Change unit flow Recalculate by interpolation until the unit torque of all braking V zones is obtained. .

[0102] In this embodiment, a typical 6-jet, 6-bend impulse turbine is taken as an example, such as... Figure 4 A three-dimensional mesh diagram illustrating the full characteristics of an impulse turbine is provided, depicting the full characteristic curves of the impulse turbine model under different numbers of working nozzles.

[0103] The following describes a calculation device for the full characteristic curve of an impulse turbine model provided by the present invention. Figure 5 A schematic diagram of the structure of the calculation device for the full characteristic curve of the impulse turbine model provided by the present invention includes: a curve processing module 51, a first calculation module 52, a second calculation module 53, and an output module 54, wherein:

[0104] Curve processing module 51 is used to process nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, and wind resistance curves of impulse turbines under different numbers of working nozzles.

[0105] The first calculation module 52 is used to calculate the relationship curve between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter.

[0106] The second calculation module 53 is used to calculate the relationship curves between the unit torque of the impulse turbine and the unit speed and unit flow rate.

[0107] Output module 54 is used to output the full characteristic curves of the impulse turbine model.

[0108] Figure 6 The schematic diagram of the electronic device provided by the present invention includes a memory 61, a processor 62 and a bus unit 63, wherein the memory 61 and the processor 62 interact through the bus unit 63. The memory 61 stores program code that can run on the processor. When the program code is executed by the processor 62, it implements the calculation method of the full characteristic curve of the impulse turbine model.

[0109] In the several embodiments provided by this invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

Claims

1. A method for calculating the full characteristic curve of an impulse turbine model, characterized in that: include, Obtain nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for impulse turbines with different numbers of working nozzles; By selecting the number of working nozzles, the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter are obtained. Based on the selected number of working nozzles, the relationship curves between the unit torque, unit speed, and unit flow rate of the impulse turbine are obtained, and the full characteristic curve of the impulse turbine model is output. This includes obtaining nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for impulse turbines with different numbers of working nozzles, including... The number of working nozzles of the impulse turbine is set as follows: Experiments were conducted based on an impulse turbine model to obtain the corresponding turbine parameters, including nozzle opening. Deflector opening Maximum jet diameter of nozzle Nozzle working jet diameter Gravitational acceleration Unit flow Unit speed and unit torque ; According to the corresponding number of working nozzles The test data were used to fit the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve. Among them, by selecting the number of working nozzles, the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter are obtained, including... Select the number of working nozzles ,according to The flow characteristic curves of the impact turbine nozzles under each working nozzle were obtained by constructing a polynomial curve fitting calculation to obtain the unit flow characteristic coefficient. ,in , , , for The relationship curve parameters between the opening degree and the unit flow characteristic coefficient of each working nozzle; Based on the deflector's operating status, the influence coefficient of the deflector on the nozzle's working flow rate is established as follows: ， Based on the operating status of the nozzle and deflector, combined with the unit flow characteristic coefficient The number of working nozzles is obtained. Unit flow rate of impulse turbines at full opening , ， in This refers to the rated value per unit flow rate.

2. The method as described in claim 1, characterized in that: Output the full characteristic curves of the impulse turbine model, including: Select the number of working nozzles Extrapolating the flight characteristic curves respectively, we obtain... The runaway characteristic curve of a single working nozzle at full opening range; Select the number of working nozzles The full characteristic curve is divided into high efficiency zone I, high speed zone II, low speed zone III, low opening zone IV, and braking zone V. Based on the comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve, the three-point Lagrange or parabolic interpolation method is used to perform curve fitting or extension to obtain the full characteristic curve of the impulse turbine model.

3. The method as described in claim 2, characterized in that: The flight characteristic curve is extrapolated using the following numerical fitting formula. ， in, , All for The parameters of the unit flow rate-unit rotation speed relationship curve for each working nozzle are obtained by fitting the runaway characteristic curve data in the large opening range.

4. The method as described in claim 2, characterized in that: The formula for calculating the high-efficiency I zone is as follows: ， in, To calculate the turbine efficiency, based on the comprehensive operating characteristic curve, the three-point Lagrange interpolation formula or the parabolic interpolation formula is used to calculate the specified unit speed. Unit flow The efficiency of the water turbine .

5. The method as described in claim 2, characterized in that: The calculation method for the high-speed II zone and the low-speed III zone is as follows: Select a unit flow rate The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit flow Recalculate by interpolation until the unit torque in all high-speed II and low-speed III regions is obtained. .

6. The method as described in claim 2, characterized in that: The method for calculating the low-opening IV zone is as follows: Select a certain unit speed The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit speed Recalculate by interpolation until the unit torque of all low-opening IV zones is obtained. .

7. The method as described in claim 2, characterized in that: The method for calculating the braking V-zone is as follows: Based on the turbine's air resistance curve, a specific unit flow rate is selected. The specified unit rotational speed is calculated using three-point Lagrange or parabolic interpolation formulas. Unit flow Unit torque ; Change unit flow Recalculate by interpolation until the unit torque of all braking V zones is obtained. .

8. A calculation device for the full characteristic curve of an impulse turbine model, characterized in that, include, The curve processing module is configured to acquire nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for different numbers of working nozzles of the impulse turbine. The first calculation module is configured to select the number of working nozzles and obtain the corresponding relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter. The second calculation module is configured to obtain the relationship curves between the unit torque of the impulse turbine and the unit speed and unit flow rate based on the selected number of working nozzles. as well as, The output module is configured to output the full characteristic curves of the impulse turbine model; This includes obtaining nozzle flow characteristic curves, comprehensive operating characteristic curves, runaway characteristic curves, wind resistance curves, and turbine parameters for impulse turbines with different numbers of working nozzles, including... The number of working nozzles of the impulse turbine is set as follows: Experiments were conducted based on an impulse turbine model to obtain the corresponding turbine parameters, including nozzle opening. Deflector opening Maximum jet diameter of nozzle Nozzle working jet diameter Gravitational acceleration Unit flow Unit speed and unit torque ; According to the corresponding number of working nozzles The test data were used to fit the nozzle flow characteristic curve, comprehensive operating characteristic curve, runaway characteristic curve, and wind resistance curve. Among them, by selecting the number of working nozzles, the relationship curves between the unit flow rate of the impulse turbine and the nozzle opening, deflector opening, and nozzle jet diameter are obtained, including... Select the number of working nozzles ,according to The flow characteristic curves of the impact turbine nozzles under each working nozzle were obtained by constructing a polynomial curve fitting calculation to obtain the unit flow characteristic coefficient. ,in , , , for The relationship curve parameters between the opening degree and the unit flow characteristic coefficient of each working nozzle; Based on the deflector's operating status, the influence coefficient of the deflector on the nozzle's working flow rate is established as follows: ， Based on the operating status of the nozzle and deflector, combined with the unit flow characteristic coefficient The number of working nozzles is obtained. Unit flow rate of impulse turbines at full opening , ， in This refers to the rated value per unit flow rate.

9. An electronic device, characterized in that: The electronic device includes a memory and a processor. The memory stores program code that can run on the processor. When the program code is executed by the processor, it implements the method for calculating the full characteristic curve of the impulse turbine model as described in any one of claims 1-7.

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