Simulation method and device for power regulating nozzle switching of multi-nozzle bucket-type hydraulic turbine

Abstract

The application discloses a simulation method for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine, and comprises the following steps: establishing a water delivery system and a mathematical model of the multi-nozzle bucket-type hydraulic turbine; obtaining a characteristic curve of the multi-nozzle bucket-type hydraulic turbine and a nozzle stroke flow curve; determining PID program related parameters and a nozzle switching strategy of the bucket-type hydraulic turbine; performing simulation calculation on power regulation nozzle switching of the multi-nozzle bucket-type hydraulic turbine; and outputting macroscopic parameter extreme values and variation curves in the power regulation process. Compared with the prior art, the method has the following advantages: the calculation method can realize quick and stable nozzle switching of the multi-nozzle bucket-type hydraulic turbine, simulate the power regulation process of the bucket-type hydraulic turbine in an actual scene, and provide a reference for safe and stable operation of the unit.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dynamic modeling and model simulation in the transition process of hydropower stations, and particularly relates to a simulation method and device for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine. BACKGROUND

[0002] The bucket-type hydraulic turbine converts the pressure potential energy of the water flow into jet kinetic energy through a special water guide mechanism (water distribution ring pipe and nozzle, etc.) to drive the runner to rotate. With the characteristics of being suitable for higher water head and wider operating range, it has become the core equipment for developing high-head hydropower energy. In order to improve the single-machine capacity and operating efficiency of the bucket-type hydraulic turbine, the multi-nozzle design is currently widely used in the bucket-type hydraulic turbine. However, the increase in the number of nozzles may exacerbate the mutual interference of the water flow inside the runner, and at the same time, it may bring about the problem of complex switching control between nozzles. Especially in the transition process of the bucket-type hydraulic turbine, in order to better regulate the output and flow, the multi-nozzle switching regulation of the bucket-type hydraulic turbine is often required. In the process of nozzle switching, the stress and speed of the runner will have obvious fluctuations, which will aggravate the complexity of the flow inside the runner and affect the safe and stable operation of the unit.

[0003] At present, the research on the power regulation nozzle switching process of the multi-nozzle bucket-type hydraulic turbine is still insufficient. The main reasons are as follows: 1. There is still a lack of experience on the nozzle switching strategy in the regulation process, and the change of the mutual action of the nozzles is not well understood; 2. There is a lack of a relatively efficient and accurate simulation calculation method and system for quantitatively describing the nozzle switching process. With the gradual formation of the new power system mainly based on new energy, the multi-nozzle bucket-type hydraulic turbine will be increasingly frequently used to undertake the regulation task of peak shaving and valley filling. It is very urgent to efficiently and accurately simulate the nozzle switching process of the multi-nozzle bucket-type hydraulic turbine. Therefore, it is necessary to invent a simulation calculation method and device for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine for the nozzle switching process. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a simulation method and device for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine.

[0005] The present application is realized by the following technical solutions:

[0006] In a first aspect, a simulation method for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine is provided, comprising the following steps:

[0007] establishing a mathematical model of the water delivery system and the multi-nozzle bucket-type hydraulic turbine;

[0008] obtaining the characteristic curve of the multi-nozzle bucket-type hydraulic turbine and the nozzle stroke-flow curve;

[0009] determining PID program related parameters and bucket type hydraulic turbine nozzle switching strategy;

[0010] simulating and calculating power regulation nozzle switching of multi-nozzle bucket type hydraulic turbine;

[0011] outputting extreme values and variation curves of macro parameters in power regulation process.

[0012] In a possible implementation manner, the method for establishing the mathematical model comprises:

[0013] establishing a model of the water delivery system; the model comprises various parameters of hydraulic nodes in the water delivery system;

[0014] establishing a model of the multi-nozzle bucket type hydraulic turbine; the model comprises operating states of the multi-nozzle bucket type hydraulic turbine, nozzle operation, nozzle switching points and target power.

[0015] In a possible implementation manner, the characteristic curves of the multi-nozzle bucket type hydraulic turbine comprise torque characteristic curves, flow characteristic curves and nozzle stroke flow curves corresponding to different numbers of nozzles in target power operation;

[0016] The torque characteristic curves are used for interpolating calculation of the torque of the bucket type hydraulic turbine; the flow characteristic curves and the nozzle stroke flow curves are used for interpolating calculation of nozzle flow.

[0017] Further, the torque characteristic curves corresponding to the different numbers of nozzles are partially overlapped, for realizing equal-torque switching of the torque characteristic curves in the nozzle switching process.

[0018] In a possible implementation manner, the PID program is used for power control in the power regulation process, and the related parameters comprise a proportional coefficient K p , an integral coefficient K i , a differential coefficient K d and a steady-state slip coefficient b p ; the related parameters are obtained by trial and error method.

[0019] The nozzle switching strategy of the bucket type hydraulic turbine comprises: when the power reaches the nozzle switching point, a certain number of nozzles are closed according to a straight line closing rule under the PID control; the nozzle opening of the remaining nozzles is controlled by the PID program to compensate, so as to keep the unit power unchanged in the switching process.

[0020] In a possible implementation manner, in the method for simulating and calculating the power regulation nozzle switching of the multi-nozzle bucket type hydraulic turbine, the water delivery system is calculated by using a one-dimensional characteristic line method, and the multi-nozzle bucket type hydraulic turbine unit part provides boundary conditions of the one-dimensional characteristic line method;

[0021] The method for simulating and calculating comprises:

[0022] PID program keeps the calculation model in initial power steady operation;

[0023] Adjust the power to the nozzle switching point and keep it in steady operation at the switching point;

[0024] After the completion of the nozzle switching, continue to adjust to the target power.

[0025] Further, when the nozzle switching is completed, the torque characteristic curve switching corresponding to different nozzle numbers and the relative opening switching corresponding to different working nozzles are also completed at the same time;

[0026] Wherein, the torque characteristic curve switching corresponding to different nozzle numbers and the relative opening switching corresponding to different working nozzles adopt the equal torque switching method, and the formula is as follows:

[0027] m Current =m Qh

[0028] In the formula, m Current =f(k Current ,y Current ), m Qh =f(k Qh ,y Qh ), f(...,...) represents a functional relationship; k Current is the number of working nozzles before nozzle switching, y Current is the relative opening before nozzle switching; k Qh is the number of working nozzles after nozzle switching, y Qh is the relative opening after nozzle switching; m Current is the unit torque of the water turbine corresponding to the number of nozzles before nozzle switching; m Qh is the unit torque of the water turbine corresponding to the number of nozzles after nozzle switching.

[0029] In one possible implementation, the macro parameter extreme value includes the extreme value of the pipe inlet water head, the peak-to-peak value of the water turbine unit power during nozzle switching, and the peak-to-peak value of the water turbine unit speed during nozzle switching.

[0030] The change curve includes a nozzle opening change curve, a pipe inlet water head change curve, a power relative value change curve, and a flow change curve.

[0031] In a second aspect, a multi-nozzle bucket-type water turbine power regulation nozzle switching simulation device is provided, comprising:

[0032] A model construction module is configured to establish a water conveyance system and a multi-nozzle bucket-type water turbine mathematical model.

[0033] A curve obtaining module is configured to obtain a multi-nozzle bucket turbine characteristic curve and a nozzle stroke flow curve;

[0034] A decision module is configured to determine PID program related parameters and a bucket turbine nozzle switching strategy;

[0035] A calculation module is configured to simulate calculation of multi-nozzle bucket turbine power regulation nozzle switching;

[0036] An output module is configured to output macro parameter extreme value and variation curve in a power regulation process.

[0037] In a third aspect, an electronic device is provided, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the foregoing multi-nozzle bucket turbine power regulation nozzle switching simulation method when executing the program.

[0038] Effects and advantages of the present application are as follows:

[0039] 1. The present application realizes a multi-nozzle bucket turbine power regulation nozzle switching simulation calculation method, which can be used to quantitatively describe a multi-nozzle bucket turbine power regulation nozzle switching process and provide a basis for fully exploring the change law of the switching process;

[0040] 2. The present application can be used as a basis for optimization calculation of a bucket turbine power regulation nozzle switching, provide accurate sample data for optimization of a nozzle switching process of a unit, and accelerate the optimization process of the nozzle switching process;

[0041] 3. The nozzle switching simulation calculation method and system provided by the present application can quickly and accurately simulate a bucket turbine unit power regulation process in an actual scenario and obtain macro parameter information reflecting the real situation, thereby providing a reference for safe and stable operation of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A flowchart of a multi-nozzle bucket turbine power regulation nozzle switching simulation method related to an embodiment of the present application;

[0043] Figure 2 A nozzle opening degree and water head variation diagram of a multi-nozzle bucket turbine power regulation process related to an embodiment of the present application;

[0044] Figure 3 A power and flow variation diagram of a multi-nozzle bucket turbine power regulation process related to an embodiment of the present application;

[0045] Figure 4 A structural schematic diagram of a multi-nozzle bucket turbine power regulation nozzle switching simulation device provided by the present application;

[0046] Figure 5 is a structural schematic diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0047] In order to facilitate those skilled in the art to understand and implement the present application, the present application will be further described below in combination with the drawings and specific embodiments, and the embodiments described herein are only used to illustrate and explain the present application, but the protection scope of the present application is not limited thereto.

[0048] Referring to Figure 1 The simulation method for power regulation nozzle switching of a multi-nozzle bucket-type hydraulic turbine provided by the present application includes the following steps:

[0049] S100, establishing a mathematical model of a water delivery system and a multi-nozzle bucket-type hydraulic turbine.

[0050] In one possible implementation, the step S100 includes:

[0051] establishing a model of the water delivery system; the model includes various parameters of hydraulic nodes in the water delivery system;

[0052] establishing a model of the multi-nozzle bucket-type hydraulic turbine; the model includes operating states of the multi-nozzle bucket-type hydraulic turbine, nozzle operation, nozzle switching points (Qh_Point) and target power (Target Power).

[0053] Further, the water delivery system includes a diversion tunnel, a pressure pipeline and a distribution ring connected in sequence; the surge chamber is connected to the diversion tunnel.

[0054] Still further, the various parameters of the hydraulic nodes in the water delivery system include: elevation and area of the surge chamber; diameter and area of the resistance hole; length, diameter and area of the pipeline, along-the-pipeline water head loss, water flow direction and pipeline wave speed.

[0055] In the present embodiment, the initial power is recorded as 1.0, the nozzle switching point Qh_Point is determined as 0.75, and the target power Target Power is determined as 0.65.

[0056] It should be noted that the present embodiment uses a MATLAB script file to construct the mathematical model of the water delivery system and the bucket-type hydraulic turbine and to perform simulation calculation of the power regulation nozzle switching of the hydraulic turbine unit.

[0057] S200, obtaining a characteristic curve of the multi-nozzle bucket-type hydraulic turbine and a nozzle stroke flow curve.

[0058] In one possible implementation, in the step S200,

[0059] The characteristic curve of the multi-nozzle bucket turbine includes torque characteristic curves, flow characteristic curves and nozzle stroke flow curves corresponding to different numbers of nozzles when working at a target power;

[0060] The torque characteristic curves are used for interpolation calculation of the torque of the bucket turbine, and the flow characteristic curves and the nozzle stroke flow curves are used for interpolation calculation of the nozzle flow.

[0061] Further, the torque characteristic curves corresponding to different numbers of nozzles are partially overlapped, and are used for equal-torque switching of the torque characteristic curves in the nozzle switching process.

[0062] It should be noted that the torque characteristic curves corresponding to different numbers of nozzles have an intersection on a partial opening line, which can be regarded as being partially overlapped. The method described in the embodiment finds whether the intersection of the torque characteristic curves corresponding to different numbers of nozzles exists on the partial opening line through a torque characteristic curve diagram, so as to determine whether the torque characteristic curves corresponding to different numbers of nozzles are partially overlapped.

[0063] In the embodiment, the torque characteristic curves respectively include torque characteristic curves corresponding to 6 nozzles and 4 nozzles working, and the torque characteristic curves corresponding to 6 nozzles working are partially overlapped with the torque characteristic curves corresponding to 4 nozzles.

[0064] S300, determining PID program related parameters and a nozzle switching strategy of the bucket turbine.

[0065] In a possible implementation manner, in the step S300, the PID program is used for power control in a power adjustment process, and the related parameters include a proportional coefficient K p , an integral coefficient K i , a differential coefficient K d and a steady-state slip coefficient b p ; the related parameters are obtained through a trial and error method.

[0066] The nozzle switching strategy of the bucket turbine includes: when the power reaches a nozzle switching point (Qh_Point), a certain number of nozzles are closed according to a straight line closing rule under the PID control; and the nozzle opening of the remaining nozzles is compensated by the PID program to keep the unit power unchanged in the switching process.

[0067] Further, the compensation method includes: the total opening of the closed nozzles is reversely and evenly divided and compensated to the opening of each remaining nozzle.

[0068] In this embodiment, the nozzle switching strategy is selected as follows: when the unit power reaches the nozzle switching point Qh_Point=0.75, the two nozzles are controlled by PID to be closed linearly within 10 seconds, while the remaining four nozzles are controlled by PID to be opened correspondingly, and the opening of the four nozzles is compensated correspondingly to keep the unit power at 0.75 during the switching process. The specific process is shown in Figure 2 .

[0069] It should be noted that the linear closing rule is that the opening of the two nozzles at the switching time is linearly closed to 0 at a constant rate within 10 seconds.

[0070] S400, simulate and calculate the nozzle switching of the multi-nozzle bucket-type hydraulic turbine.

[0071] In one possible implementation, during the simulation calculation, the water delivery system is calculated by using a one-dimensional characteristic line method, and the multi-nozzle bucket-type hydraulic turbine unit provides boundary conditions for the one-dimensional characteristic line method.

[0072] Further, the boundary conditions include the opening of each nozzle and the flow of each nozzle.

[0073] In one possible implementation, the step S400 includes:

[0074] The PID program keeps the calculation model stable at the initial power;

[0075] Adjust the power to the nozzle switching point and keep it stable at the switching point;

[0076] After the nozzle switching is completed, continue to adjust to the target power.

[0077] In this embodiment, first, the PID program keeps the calculation model stable at the initial power 1.0, then adjusts to the nozzle switching point Qh_Point=0.75 and keeps it stable at the switching point; after the nozzle switching is completed, continue to adjust to the target power Target Power=0.65, and the power adjustment process of this embodiment is shown in Figure 3 .

[0078] Further, when the nozzle switching is completed, the torque characteristic curve switching corresponding to different nozzle numbers and the relative opening switching corresponding to different working nozzles are also completed.

[0079] The torque characteristic curve switching corresponding to different nozzle numbers and the relative opening switching corresponding to different working nozzles are implemented by using the equal torque switching method, and the formula is as follows:

[0080] m Current = m Qh

[0081] wherein m Current = f(k Current , y Current ), m Qh = f(k Qh , y Qh ), f(...,...) represents a function relationship; k Current is the number of working nozzles before nozzle switching, y Current is the relative opening degree before nozzle switching; k Qh is the number of working nozzles after nozzle switching, y Qh is the relative opening degree after nozzle switching; m Curren t is the unit torque of the hydraulic turbine corresponding to the number of nozzles before nozzle switching; and m Qh is the unit torque of the hydraulic turbine corresponding to the number of nozzles after nozzle switching.

[0082] In the embodiment, m Current and m Qh are torques corresponding to a power relative value of 0.75, k Current = 6, k Qh = 4; y Current = 0.37, and y Qh = 0.71.

[0083] It should be noted that the function relationship m Current = f(k Current , y Current ) is obtained by interpolation using the number of nozzles k Current and the relative opening degree y Current on the 6-nozzle torque characteristic curve, and the function relationship m Qh = f(k Qh , y Qh ) is obtained by interpolation using the number of nozzles k Qh and the relative opening degree y Qh on the 4-nozzle torque characteristic curve.

[0084] S500, output the extreme values of the macro parameters and the change curves in the power adjustment process.

[0085] In one possible implementation, in the step S500, the extreme values of the macro parameters include an extreme value of the ring pipe inlet water head, a peak-to-peak value of the power of the hydraulic turbine unit in the nozzle switching process, and a peak-to-peak value of the rotating speed of the hydraulic turbine unit in the nozzle switching process; and the change curves include a change curve of different nozzle opening degrees with time, a change curve of the ring pipe inlet water head with time, a change curve of the power relative value with time, and a change curve of the flow with time.

[0086] The following describes the multi-nozzle bucket turbine power regulation nozzle switching simulation device provided by the present invention. The multi-nozzle bucket turbine power regulation nozzle switching simulation device described below can be referred to in correspondence with the multi-nozzle bucket turbine power regulation nozzle switching simulation method described above.

[0087] Figure 4 This is a schematic diagram of the multi-nozzle bucket turbine power regulation nozzle switching device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, it includes: a model building module 41, a curve acquisition module 42, a decision module 43, a calculation module 44, and an output module 45, wherein:

[0088] Model building module 41 is used to establish mathematical models of the water conveyance system and the multi-nozzle bucket turbine.

[0089] Curve acquisition module 42 is used to obtain the characteristic curves and nozzle stroke flow curves of a multi-nozzle bucket turbine.

[0090] Decision module 43 is used to determine the relevant parameters of the PID program and the nozzle switching strategy of the bucket turbine.

[0091] Calculation module 44 is used to perform simulation calculations on the switching of power regulating nozzles in a multi-nozzle bucket turbine.

[0092] Output module 45 is used to display the extreme values ​​and variation curves of macroscopic parameters during the output power adjustment process.

[0093] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include a processor 510, a communication interface 520, a memory 530, and a communication bus 540. The processor 510, communication interface 520, and memory 530 communicate with each other via the communication bus 540. The processor 510 can call logic instructions from the memory 530 to execute a simulation method for switching nozzles in a multi-nozzle bucket turbine power regulation system.

[0094] In addition, the logic instructions in the memory 530 described above can be implemented in the form of software function units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc.

[0095] The device embodiments described above are only illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0096] From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions essentially or the parts that contribute to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0097] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A simulation method for switching of power regulating nozzles of a multi-nozzle bucket-type hydraulic turbine, characterized by, The method comprises the following steps: a mathematical model of a water delivery system and a multi-nozzle bucket turbine is established; a characteristic curve of the multi-nozzle bucket turbine and a nozzle stroke flow curve are obtained; the characteristic curve of the multi-nozzle bucket turbine comprises torque characteristic curves, flow characteristic curves and nozzle stroke flow curves corresponding to different numbers of nozzles when the nozzles work at a target power; the torque characteristic curves are used for interpolating calculation of a torque of the bucket turbine; the flow characteristic curves and the nozzle stroke flow curves are used for interpolating calculation of nozzle flow; the torque characteristic curves corresponding to the different numbers of nozzles are partially overlapped, and are used for realizing equal-torque switching of the torque characteristic curves in a nozzle switching process; PID program related parameters and a nozzle switching strategy of the bucket turbine are determined; simulation calculation of power regulation nozzle switching of the multi-nozzle bucket turbine is performed; extreme values and variation curves of macro parameters in a power regulation process are output.

2. The method according to claim 1, wherein, The method for establishing the mathematical model comprises: a model of the water delivery system is established; the model comprises various parameters of hydraulic nodes in the water delivery system; a model of the multi-nozzle bucket turbine is established; the model comprises an operating state of the multi-nozzle bucket turbine, a nozzle operation condition, a nozzle switching point and a target power.

3. The method of claim 1, wherein, The PID program is used for power control in the power regulating process, and its related parameters include proportional coefficient K p , integral coefficient K i , differential coefficient K d and permanent state slip coefficient b p ; The related parameters are obtained by a trial-and-error method; the nozzle switching strategy of the bucket turbine comprises: when power reaches the nozzle switching point, a certain number of nozzles are closed according to a straight line closing rule under PID control; a nozzle opening degree of the remaining nozzles is controlled by the PID program to compensate, so that the power of the unit remains unchanged in the switching process.

4. The method of claim 1, wherein, In the method for performing simulation calculation of the power regulation nozzle switching of the multi-nozzle bucket turbine, the water delivery system is calculated by using a one-dimensional characteristic line method, and the multi-nozzle bucket turbine unit part provides boundary conditions of the one-dimensional characteristic line method; the simulation calculation method comprises: the PID program keeps the calculation model stable at an initial power; the power is regulated to the nozzle switching point and kept stable at the switching point; after the nozzle switching is completed, the power is continuously regulated to a target power.

5. The method of claim 4, wherein, When the nozzle switching is completed, switching of torque characteristic curves corresponding to different numbers of nozzles and switching of relative opening degrees corresponding to different working nozzles are simultaneously completed; the switching of the torque characteristic curves corresponding to the different numbers of nozzles and the switching of the relative opening degrees corresponding to the different working nozzles are equal-torque switching methods, and a formula is as follows: In the formula, , , represents a function relationship; is the number of working nozzles before nozzle switching, is the relative opening degree before nozzle switching; is the number of working nozzles after nozzle switching, is the relative opening degree after nozzle switching; is the unit torque of the water turbine corresponding to the number of nozzles before nozzle switching; is the unit torque of the water turbine corresponding to the number of nozzles after nozzle switching.

6. The method of claim 1, wherein, the extreme values of the macro parameters comprise an extreme value of an inlet water head of a ring pipe, a peak-to-peak value of power of the bucket turbine in the nozzle switching process and a peak-to-peak value of rotating speed of the bucket turbine in the nozzle switching process; the variation curves comprise variation curves of different nozzle opening degrees with time, variation curves of the inlet water head of the ring pipe with time, variation curves of a power relative value with time and variation curves of flow with time.

7. A simulation device for switching of power regulating nozzles of a multi- nozzle bucket turbine, characterized in that The method for realizing the power regulation nozzle switching simulation of the multi-nozzle bucket turbine according to any one of claims 1-6 comprises: a model construction module for establishing a mathematical model of a water delivery system and a multi-nozzle bucket turbine; a curve obtaining module for obtaining a characteristic curve of the multi-nozzle bucket turbine and a nozzle stroke flow curve; a decision module for determining PID program related parameters and a nozzle switching strategy of the bucket turbine; A computing module is configured to simulate the power regulation nozzle switching of the multi-nozzle bucket-type hydraulic turbine. An output module is configured to output the extreme values and variation curves of the macro-parameters in the power regulation process.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the simulation method for the power regulation nozzle switching of the multi-nozzle bucket-type hydraulic turbine according to any one of claims 1 to 6 when executing the program.

Images