Flow distribution and speed control method, system, medium and device for steam turbine

Abstract

The application provides a flow distribution and rotating speed control method, system, medium and device of a steam turbine, the method comprising the following steps: receiving a flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and a remote control instruction signal; selecting a correct rotating speed feedback signal from the three rotating speed feedback signals based on a two-out-of-three logic judgment principle; selecting a correct displacement feedback signal from the two displacement feedback signals based on a comparison judgment principle; obtaining a calculation result based on PID calculation of the flow instruction signal, the correct rotating speed feedback signal, the correct displacement feedback signal and the remote control instruction signal; and outputting the calculation result to an electro-hydraulic servo coil, so that the electro-hydraulic servo coil controls the opening position of the valve of the steam turbine based on the calculation result. The flow distribution and rotating speed control method, system, medium and device of the steam turbine are used to realize accurate control of the opening of the valve of the steam turbine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbines, in particular to a flow distribution and rotating speed control method, system, medium and device for steam turbines. BACKGROUND

[0002] The common servo control module on the steam turbine unit can only control the actual opening of the actuator (oil motor) through the comparison of the valve opening command and the displacement feedback (one or two) of the actuator (oil motor) and the output of the shaping amplifier.

[0003] In the process of implementing the present application, the inventors found that the prior art at least has the following problems.

[0004] The conventional servo control module design has a relatively single function and can only match the hardware system itself, and is not widely applicable. The way of converting the rotating speed feedback into an analog signal and then sending it into the servo control module will reduce the accuracy and rapid response performance of the rotating speed feedback and affect the control performance of the steam turbine unit.

[0005] Therefore, it is desirable to solve the problem of how to improve the control performance of the steam turbine unit. SUMMARY

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a flow distribution and rotating speed control method, system, medium and device for steam turbines, which is used to solve the problem of how to improve the control performance of the steam turbine unit in the prior art.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a flow distribution and rotating speed control method for steam turbines, comprising the following steps: receiving a flow command signal, three rotating speed feedback signals, two displacement feedback signals and a remote control command signal; selecting a correct rotating speed feedback signal from the three rotating speed feedback signals based on the three-to-two logic judgment principle; selecting a correct displacement feedback signal from the two displacement feedback signals based on the comparison judgment principle; obtaining a calculation result based on the PID calculation of the flow command signal, the correct rotating speed feedback signal, the correct displacement feedback signal and the remote control command signal; and outputting the calculation result to an electro-hydraulic servo coil to control the opening position of the valve of the steam turbine based on the calculation result.

[0008] To achieve the above object, the application further provides a flow distribution and rotating speed control system of a steam turbine, comprising a receiving module, a rotating speed judging module, a displacement judging module and a calculating module; the receiving module is used for receiving a flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and a remote control instruction signal; the rotating speed judging module is used for selecting a correct rotating speed feedback signal from the three rotating speed feedback signals based on a three-to-two logic judging principle; the displacement judging module is used for selecting a correct displacement feedback signal from the two displacement feedback signals based on a comparison judging principle; the calculating module is used for obtaining a calculation result based on PID calculation of the flow instruction signal, the correct rotating speed feedback signal, the correct displacement feedback signal and the remote control instruction signal, and outputting the calculation result to an electro-hydraulic servo coil, so that the electro-hydraulic servo coil controls the opening position of the valve of the steam turbine based on the calculation result.

[0009] To achieve the above object, the application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement any of the above-mentioned flow distribution and rotating speed control methods of a steam turbine.

[0010] To achieve the above object, the application further provides a flow distribution and rotating speed control device of a steam turbine, comprising a processor and a memory; the memory is used for storing a computer program; the processor is connected with the memory and is used for executing the computer program stored in the memory, so that the flow distribution and rotating speed control device of the steam turbine executes any of the above-mentioned flow distribution and rotating speed control methods of a steam turbine.

[0011] As described above, the flow distribution and rotating speed control method, system, medium and device of a steam turbine have the following beneficial effects: used for realizing accurate control of the opening of the valve of the steam turbine. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1a A schematic diagram of an application scenario architecture in an embodiment of the flow distribution and rotating speed control method of a steam turbine of the application is shown;

[0013] Figure 1b A flow chart in an embodiment of the flow distribution and rotating speed control method of a steam turbine of the application is shown;

[0014] Figure 1c A valve arrangement diagram in an embodiment of the flow distribution and rotating speed control method of a steam turbine of the application is shown;

[0015] Figure 1d A valve flow lift curve diagram in an embodiment of the flow distribution and rotating speed control method of a steam turbine of the application is shown;

[0016] Figure 1eA flowchart showing a flow distribution and rotation speed control method of a steam turbine according to an embodiment of the present application;

[0017] Figure 2 A structural diagram showing a flow distribution and rotation speed control system of a steam turbine according to an embodiment of the present application;

[0018] Figure 3 A structural diagram showing a flow distribution and rotation speed control device of a steam turbine according to an embodiment of the present application.

[0019] Element number explanation

[0020] 21 receiving module

[0021] 22 rotation speed judging module

[0022] 23 displacement judging module

[0023] 24 calculating module

[0024] 31 processor

[0025] 32 memory DETAILED DESCRIPTION

[0026] The present application is described in greater detail by the following specific examples. Other advantages and benefits of the present application will become apparent to those skilled in the art upon reading the following description in conjunction with the accompanying drawings. The present application can be implemented or applied in other different specific ways without departing from the spirit and scope of the present application. The details of the present application in the specification can be modified based on different views and applications without departing from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and thus only show the components related to the present application in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and ratio of the components when actually implemented can be arbitrarily changed, and the layout of the components can be more complex.

[0028] The flow distribution and rotation speed control method, system, medium and device of the steam turbine according to the present application are used to realize accurate control of the opening of the valve of the steam turbine.

[0029] As Figure 1aAs shown, the flow distribution and rotating speed control method, system, medium and device of the steam turbine of the present application are applied to the application scene of the servo module. By receiving the flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and remote control instruction signals, etc., the calculation results, digital output and displacement display output are output, and the precise control of the opening of the valve of the steam turbine is realized.

[0030] As shown, in an embodiment, the flow distribution and rotating speed control method of the steam turbine of the present application comprises the following steps: Figure 1b

[0031] Step S11, receiving the flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and remote control instruction signals.

[0032] Specifically, the receiving of the flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and remote control instruction signals comprises:

[0033] Receiving the flow instruction signal sent by the control system. Specifically, the control system comprises a digital electro-hydraulic control system. The flow instruction signal is an analog signal, which needs to be converted into a digital signal by A / D conversion. The flow instruction signal is used to adjust the displacement feedback signal.

[0034] Receiving three rotating speed feedback signals sent by three actual speed measurement probes on site, which are arranged on the steam turbine. Specifically, three identical actual speed measurement probes on site are arranged on the steam turbine to measure the rotating speed of the steam turbine in real time. The rotating speed feedback signal measured by the actual speed measurement probe on site is a square wave or sine wave signal. After the three rotating speed feedback signals are detected and shaped and amplified by FPGA, the correct rotating speed feedback signal among the three rotating speed feedback signals is selected based on the three-to-two logic judgment principle.

[0035] Receiving two displacement feedback signals sent by displacement detectors, which are arranged on the steam turbine. Specifically, two displacement detectors are arranged on the steam turbine to measure two displacement feedback signals in real time. The two displacement feedback signals are also analog signals, which need to be converted into digital signals by A / D conversion.

[0036] Receiving the remote control instruction signal sent by the control system. The control system comprises a distributed control system or a digital electro-hydraulic control system. The remote control instruction signal is a 4-20 mA analog signal, which needs to be converted into a digital signal by A / D conversion. The remote control instruction signal is used to adjust the rotating speed or pressure feedback signal, etc. The remote control instruction signal comprises the rotating speed or pressure signal, etc.

[0037] ​Specifically, the flow instruction signal is a flow instruction signal that can be edited on demand. The flow instruction signal is edited according to a valve control characteristic; the flow instruction signal is a corresponding signal of an analog signal of 4-20 mA and an opening signal of 0%-100%; and the corresponding relationship function of the analog signal of 4-20 mA and the opening signal of 0%-100% is determined by the valve control characteristic; and the control characteristic of the valve is determined by a valve flow lift curve. For example, as shown in FIG. 1, one DN160 regulating steam valve and three DN200 regulating steam valves are provided together with the main steam valve and arranged on the inlet cylinder. After the main steam valve, the regulating steam valves are arranged in the order of DN200, DN160, DN200, DN200 from left to right, corresponding to GV3, GV4, GV2, GV1 respectively, and the valve arrangement is as shown in FIG. 2. GV3 corresponds to the third valve, GV4 corresponds to the fourth valve, GV2 corresponds to the second valve, and GV1 corresponds to the first valve. Each valve has its own valve flow lift curve, as shown in FIG. 3, which is the flow lift curve of the first valve. The corresponding relationship function of the analog signal of 4-20 mA and the opening signal of 0%-100% is determined according to the flow lift curve of the first valve. Thus, the flow instruction signal is edited on demand according to the corresponding relationship function of different valves, so that the flow instruction has an online compiling function and the modification parameter operation is flexible and simple, which can reduce the rapid performance requirement of the control system and improve the stability of the steam turbine unit. Figure 1c Figure 1c Figure 1d

[0038] Step S12, selecting a correct speed feedback signal from the three speed feedback signals based on a two-out-of-three logic judgment principle.

[0039] Specifically, the correct speed feedback signal is selected from the three speed feedback signals based on a two-out-of-three logic judgment principle, which includes:

[0040] The two speed feedback signals that are closer are selected by comparing the three speed feedback signals, and the speed feedback signal with large deviation is eliminated. For example, the three speed feedback signals are a first speed feedback signal, a second speed feedback signal, and a third speed feedback signal; a first absolute value of the difference between the first speed feedback signal and the second speed feedback signal is calculated, a second absolute value of the difference between the first speed feedback signal and the third speed feedback signal is calculated, a third absolute value of the difference between the third speed feedback signal and the second speed feedback signal is calculated, and the two signals corresponding to the smallest absolute value among the first, second, and third absolute values are selected as the two speed feedback signals.

[0041] ​​​The two close speed feedback signals are compared with the reference speed signal, and the reference speed signal closer to the reference speed signal is taken as the correct speed feedback signal. In this way, the speed of the steam turbine is accurately measured. The speed feedback is a signal (square wave or sine wave) directly from the on-site speed measuring probe on the steam turbine into the FPGA part of the module, which first detects and shapes and amplifies the received signal, then makes a three-to-two logic judgment, and sends the final correct speed feedback signal to the module processor. The working speed signal of the steam turbine is taken as the target value, and the corresponding speed range value is converted according to the speed inequality rate (δ). If the target speed is lower than the target speed, it is a "+" signal, and if it is higher than the target speed, it is a "-" signal. The speed feedback directly uses the signal from the on-site measuring device, which is the most direct and effective way. If the existing technology converts the speed feedback into an analog signal and then sends it into the servo control module, the accuracy and speed of the speed feedback will be reduced, and the control performance of the steam turbine unit will be affected.

[0042] Step S13, selecting a correct displacement feedback signal from the two displacement feedback signals based on a comparison judgment principle.

[0043] Specifically, the correct displacement feedback signal from the two displacement feedback signals based on the comparison judgment principle includes:

[0044] The two displacement feedback signals are compared with the flow command signal, and the displacement feedback signal close to the flow command signal is selected as the correct displacement feedback signal. In this way, the displacement feedback signal is accurately measured.

[0045] Step S14, obtaining a calculation result based on PID calculation of the flow command signal, the correct speed feedback signal, the correct displacement feedback signal and the remote control command signal, and outputting the calculation result to the electro-hydraulic servo coil to control the opening position of the valve of the steam turbine based on the calculation result.

[0046] Specifically, in process control, the PID (proportional-integral-derivative) controller (also known as PID regulator) which controls according to the proportion (P), integral (I) and differential (D) of the deviation is the most widely used automatic controller. It has the advantages of simple principle, easy implementation, wide application, independent control parameters, and simple parameter selection; and in theory, it can be proved that for the typical objects of process control, "first-order lag + pure lag" and "second-order lag + pure lag", the PID controller is an optimal control. PID calculation is a corresponding calculation based on the PID controller. PID algorithm is mainly used in motor control, switching power supply, power management chip and other fields. For example, PID regulator. In this application, how to obtain the calculation result based on PID calculation is not the focus of this application, and the PID calculation as prior art will not be described here.

[0047] Specifically, the method further comprises receiving a digital instruction, and closing the steam turbine based on the digital instruction. The digital instruction is a signal sent by the steam turbine in an emergency shutdown or load rejection condition, and directly acts on the output loop without PID calculation, so that the actuator is quickly closed, and the steam turbine is quickly closed to prevent the steam turbine from overspeeding.

[0048] Specifically, the method further comprises sending an alarm signal when the digital instruction is received. Since the digital instruction is received when the steam turbine needs to be in an emergency condition, the personnel need to be notified in time, and therefore, the alarm signal is sent when the digital instruction is received, which can play a warning role.

[0049] The method can be used for conventional control of a single valve or multiple valves of a steam turbine unit, and can also be used for a small network or isolated network control requirement of the steam turbine unit in a large network. In addition, the method can also be used for a unit requiring frequency conversion operation control mode. According to different working conditions of the steam turbine, the corresponding parameters in the online module are changed, the operation is convenient and fast, and the applicability is strong.

[0050] As shown in Figure 1e Fig. 1, in an embodiment, the flow distribution and speed control method of the steam turbine comprises the following steps: specifically, the following examples are used to explain all the steps.

[0051] A flow instruction signal sent by a control system is received. Specifically, the control system comprises a digital electro-hydraulic control system. The flow instruction signal is an analog signal, which needs to be converted into a digital signal through A / D conversion. The flow instruction signal is used to adjust a displacement feedback signal.

[0052] A digital instruction is received, and the steam turbine is closed based on the digital instruction. The digital instruction is a signal sent by the steam turbine in an emergency shutdown or load rejection condition, and directly acts on the output loop without PID calculation, so that the actuator is quickly closed, and the steam turbine is quickly closed to prevent the steam turbine from overspeeding.

[0053] A remote control instruction signal sent by a control system is received. The control system comprises a distributed control system or a digital electro-hydraulic control system. The remote control instruction signal is a 4-20 mA analog signal, which needs to be converted into a digital signal through A / D conversion. The remote control instruction signal is used to adjust a speed or pressure feedback signal.

[0054] Receive three rotation speed feedback signals sent by three in-situ actual speed measurement probes arranged in the steam turbine. Specifically, three identical in-situ actual speed measurement probes are arranged in the steam turbine to measure the rotation speed of the steam turbine in real time. The rotation speed feedback signals measured by the in-situ actual speed measurement probes are square wave or sine wave signals. After the three rotation speed feedback signals are detected and shaped and amplified by the FPGA, the correct rotation speed feedback signal is selected from the three rotation speed feedback signals based on the three-to-two logic judgment principle.

[0055] Receive two displacement feedback signals sent by displacement detectors arranged in the steam turbine. Specifically, two displacement detectors are arranged in the steam turbine to measure two displacement feedback signals in real time. The two displacement feedback signals are also analog signals, which need to be converted into digital signals by A / D conversion. The two displacement feedback signals are compared with the flow instruction signal, and the displacement feedback signal close to the flow instruction signal is selected as the correct displacement feedback signal. In this way, the accurate measurement of the displacement feedback signal is achieved.

[0056] The flow instruction signal, the correct rotation speed feedback signal, the correct displacement feedback signal, and the remote control instruction signal are used to obtain a calculation result based on PID calculation, and the calculation result is output to the electro-hydraulic servo coil to control the opening position of the valve of the steam turbine based on the calculation result.

[0057] The alarm signal is also sent when the digital quantity instruction is received. Since the digital quantity instruction is received when the steam turbine needs to be in an emergency, the staff needs to be notified in time at this time, and therefore, the alarm signal sent when the digital quantity instruction is received can play a warning role.

[0058] The display device is also used to display the calculation result controlling the opening position of the valve of the steam turbine.

[0059] As Figure 2As shown, in an embodiment, the flow distribution and rotating speed control system of the steam turbine of the present application comprises a receiving module 21, a rotating speed judging module 22, a displacement judging module 23 and a calculating module 24; the receiving module is used for receiving a flow instruction signal, three rotating speed feedback signals, two displacement feedback signals and a remote control instruction signal; the rotating speed judging module is used for selecting a correct rotating speed feedback signal from the three rotating speed feedback signals based on a two-out-of-three logic judging principle; the displacement judging module is used for selecting a correct displacement feedback signal from the two displacement feedback signals based on a comparison judging principle; the calculating module is used for obtaining a calculation result based on a PID calculation of the flow instruction signal, the correct rotating speed feedback signal, the correct displacement feedback signal and the remote control instruction signal, and outputting the calculation result to an electro-hydraulic servo coil, so as to control the opening position of the valve of the steam turbine based on the calculation result.

[0060] It should be noted that the structure and principle of the receiving module 21, the rotating speed judging module 22, the displacement judging module 23 and the calculating module 24 correspond to the steps of the above-mentioned flow distribution and rotating speed control method of the steam turbine one by one, and thus will not be described here again.

[0061] It should be noted that it should be understood that the division of each module of the above system is only a logical functional division, and all or part of them can be integrated into one physical entity, or can be physically separated. Moreover, these modules can all be realized in the form of software through a processing element; or all can be realized in the form of hardware; or part of the modules can be realized in the form of software through a processing element, and part of the modules can be realized in the form of hardware. For example, a certain module can be a separately established processing element, or can be integrated in a certain chip of the above-mentioned device, in addition, it can also be stored in the form of program code in the memory of the above-mentioned device, and the function of the above-mentioned certain module is called and executed by a certain processing element of the above-mentioned device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, or can be independently realized. The processing element described here can be an integrated circuit with signal processing capability. In the implementation process, each step of the above-mentioned method or each module can be completed by the integrated logic circuit of the hardware in the processor element or the instructions in the form of software.

[0062] For example, the above modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), or one or more Micro Processor Units (MPUs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when a certain module above is implemented in the form of a processing element scheduling code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking code. For another example, the modules can be integrated together to implement a system-on-a-chip (SOC).

[0063] In an embodiment of the present application, the present application further includes a computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements any of the above turbine flow distribution and rotating speed control methods.

[0064] Those of ordinary skill in the art can understand that all or part of the steps of the above method embodiments can be completed by a computer program related hardware. The aforementioned computer program can be stored in a computer readable storage medium. The program, when executed, performs steps including the above method embodiments; and the aforementioned storage medium includes ROM, RAM, magnetic or optical disk, and various media that can store program codes.

[0065] As shown in Figure 3 In an embodiment, the turbine flow distribution and rotating speed control device of the present application includes a processor 31 and a memory 32; the memory 32 is configured to store a computer program; the processor 31 is connected to the memory 32 and is configured to execute the computer program stored in the memory 32, so that the turbine flow distribution and rotating speed control device executes any of the above turbine flow distribution and rotating speed control methods.

[0066] Specifically, the memory 32 includes ROM, RAM, magnetic disk, U disk, memory card, optical disk, and various media that can store program codes.

[0067] Preferably, the processor 31 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0068] In summary, the flow distribution and rotating speed control method, system, medium and device of the steam turbine of the present application are used to realize the accurate control of the opening of the valve of the steam turbine. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0069] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A method of flow distribution and speed control of a steam turbine, characterized by, comprising the steps of: receiving a flow instruction signal, three-way speed feedback signals, two-way displacement feedback signals and remote control instruction signals; detecting and shaping and amplifying the three-way speed feedback signals by FPGA, comparing the three-way speed feedback signals with each other, and eliminating the speed feedback signal with large deviation; comparing the two-way speed feedback signals closer to each other with a reference speed signal, and obtaining a speed feedback signal closer to the reference speed signal as a correct speed feedback signal; selecting a correct displacement feedback signal from the two-way displacement feedback signals based on a comparison judgment principle; calculating a calculation result based on the flow instruction signal, the correct speed feedback signal, the correct displacement feedback signal and the remote control instruction signal by PID, and outputting the calculation result to an electro-hydraulic servo coil to control the opening position of the valve of the steam turbine based on the calculation result; and receiving a digital quantity instruction to quickly and directly close the steam turbine inlet valve based on the digital quantity instruction; the three-way speed feedback signals are obtained from three on-site actual speed probes installed on the steam turbine; the flow instruction signal is a flow instruction signal that can be edited as required.

2. The flow distribution and speed control method of the steam turbine according to claim 1, wherein the receiving a flow instruction signal, three-way speed feedback signals, two-way displacement feedback signals and remote control instruction signals comprises: receiving a flow instruction signal sent by a control system; receiving three-way speed feedback signals sent by three on-site actual speed probes arranged on the steam turbine; receiving two-way displacement feedback signals sent by displacement detectors arranged on the steam turbine; receiving a remote control instruction signal sent by a control system.

3. The flow distribution and speed control method of the steam turbine according to claim 1, wherein the selecting a correct displacement feedback signal from the two-way displacement feedback signals based on a comparison judgment principle comprises: comparing the two-way displacement feedback signals with a flow instruction signal, and selecting a displacement feedback signal close to the flow instruction signal as a correct displacement feedback signal.

4. The flow distribution and speed control method of the steam turbine according to claim 1, further comprising issuing an alarm signal when the digital quantity instruction is received.

5. The flow distribution and speed control method of the steam turbine according to claim 1, further comprising displaying a displacement display output based on the correct displacement feedback signal.

6. A flow distribution and speed control system for a steam turbine, characterized by comprising: a receiving module, a speed judgment module, a displacement judgment module and a calculation module; the receiving module is used for receiving a flow instruction signal, three-way speed feedback signals, two-way displacement feedback signals and remote control instruction signals; the speed judgment module is used for detecting and shaping and amplifying the three-way speed feedback signals by FPGA, comparing the three-way speed feedback signals with each other, and eliminating the speed feedback signal with large deviation; comparing the two-way speed feedback signals closer to each other with a reference speed signal, and obtaining a speed feedback signal closer to the reference speed signal as a correct speed feedback signal; selecting a correct displacement feedback signal from the two-way displacement feedback signals based on a comparison judgment principle; The displacement judgment module is configured to select a correct displacement feedback signal from the two displacement feedback signals based on a comparison judgment principle; The calculation module is configured to obtain a calculation result based on PID calculation of the flow instruction signal, the correct rotation speed feedback signal, the correct displacement feedback signal, and a remote control instruction signal, and output the calculation result to an electro-hydraulic servo coil, so that the electro-hydraulic servo coil controls the opening position of the valve of the steam turbine based on the calculation result; The receiving module is further configured to receive a digital quantity instruction, and directly and quickly close the steam turbine inlet valve based on the digital quantity instruction; The three rotation speed feedback signals are obtained by three on-site speed measurement probes installed on the steam turbine; The flow instruction signal is a flow instruction signal that can be edited as required.

7. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to implement the flow distribution and rotation speed control method of the steam turbine according to any one of claims 1 to 5.

8. A flow distribution and speed control apparatus for a steam turbine, characterized by Comprise: a processor and a memory; The memory is configured to store a computer program; The processor is connected with the memory and is configured to execute the computer program stored in the memory, so that the flow distribution and rotation speed control device of the steam turbine executes the flow distribution and rotation speed control method of the steam turbine according to any one of claims 1 to 5.

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