Joint debugging control method and device of power generation system, electronic equipment and storage medium

Abstract

The invention provides a joint debugging control method and device for a power generation system, electronic equipment and a storage medium. The joint debugging control method comprises the steps that the door front pressure of a steam turbine is obtained; executing one of first joint debugging control, second joint debugging control and third joint debugging control on the power generation system according to a relationship between the door pressure and a preset door pressure upper limit and a preset door pressure lower limit; the first joint debugging control is used for controlling the opening degree of the temperature and pressure reducing valve or controlling the turbine to increase the rotating speed; the second joint debugging control is used for controlling the opening degree of the temperature and pressure reducing valve or controlling the steam turbine to reduce the rotating speed; and the third joint debugging control is used for controlling the opening degree of the temperature and pressure reducing valve, or controlling the steam turbine to increase the rotating speed, or controlling the steam turbine to reduce the rotating speed. And control coupling between the generating capacity and the stability of the pressure in front of the door is difficult to consider.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a coordinated control method, device, electronic device and storage medium for a power generation system. Background Art

[0002] During the chemical production process, the boiler load will rise and fall with the demand of downstream steam-using units, and the change of the boiler load is synchronized with the change of the pressure in front of the steam turbine. The existing control mainly relies on manual experience, and manually adjusts the speed of the steam turbine to ensure the stability of the pressure in front and the optimal power generation load.

[0003] In the process of implementing the present invention, the inventor found through research that the existing steam turbine generally adjusts its speed by connecting the control signal to the DCS (Distributed Control System) through a 505 controller and then manually adjusting it. When the boiler load changes, it is necessary for manual judgment of the power generation amount and then decide whether to adjust the speed of the turbine or adjust the desuperheating and pressure-reducing valve. The control has hysteresis, high risk of misoperation, and it is also difficult to balance the control coupling between the power generation amount and the stability of the pressure in front. Summary of the Invention

[0004] In view of this, the present application provides a coordinated control method, device, electronic device and storage medium for a power generation system to solve the problems of existing manual pressure control with hysteresis, high risk of misoperation, and difficulty in balancing the control coupling between the power generation amount and the stability of the pressure in front.

[0005] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of the present application discloses a coordinated control method for a power generation system, where the power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure-reducing valve. The method includes:

[0007] Obtain the pressure in front of the steam turbine;

[0008] If the pressure in front is greater than the preset upper limit of the pressure in front, perform a first coordinated control on the power generation system. The first coordinated control is used to control the opening degree of the desuperheating and pressure-reducing valve, or control the steam turbine to increase its speed;

[0009] If the pressure in front is less than the preset lower limit of the pressure in front, perform a second coordinated control on the power generation system. The second coordinated control is used to control the opening degree of the desuperheating and pressure-reducing valve, or control the steam turbine to decrease its speed;

[0010] If the pressure in front of the door is between the lower limit and the upper limit of the preset pressure in front of the door, the third coordinated control is performed on the power generation system, and the third coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or control the steam turbine to increase the rotational speed, or control the steam turbine to decrease the rotational speed.

[0011] Optionally, in the above coordinated control method of the power generation system, performing the first coordinated control on the power generation system includes:

[0012] Judging whether the power generation load of the generator is lower than the preset power generation load;

[0013] If it is judged that the power generation load of the generator is not lower than the preset power generation load, control the opening of the desuperheating and pressure reducing valve;

[0014] If it is judged that the load of the generator is lower than the preset power generation load, control the steam turbine to increase the rotational speed by the first adjustment amplitude.

[0015] Optionally, in the above coordinated control method of the power generation system, before controlling the steam turbine to increase the rotational speed, it further includes:

[0016] Judging whether the number of times the steam turbine continuously performs the operation of increasing the rotational speed is greater than the preset continuous increase times;

[0017] If it is judged that the number of times the steam turbine continuously performs the operation of increasing the rotational speed is greater than the preset continuous increase times, clear the number of times the steam turbine continuously performs the operation of increasing the rotational speed after the steam turbine runs in place.

[0018] Optionally, in the above coordinated control method of the power generation system, performing the second coordinated control on the power generation system includes:

[0019] Judging whether the opening of the desuperheating and pressure reducing valve is 0% for all;

[0020] If it is judged that the opening of the desuperheating and pressure reducing valve is not 0% for all, control the opening of the desuperheating and pressure reducing valve to 0%;

[0021] If it is judged that the opening of the desuperheating and pressure reducing valve is 0% for all, control the steam turbine to decrease the rotational speed by the first adjustment amplitude.

[0022] Optionally, in the above coordinated control method of the power generation system, before controlling the steam turbine to decrease the rotational speed by the first adjustment amplitude, it further includes:

[0023] Judging whether the number of times the steam turbine continuously performs the operation of decreasing the rotational speed is greater than the preset continuous decrease times;

[0024] If it is determined that the number of times the steam turbine continuously performs the operation of reducing the rotational speed is greater than the preset continuous reduction times, then after the steam turbine runs in place, the number of times the steam turbine continuously performs the operation of reducing the rotational speed is cleared to zero.

[0025] Optionally, in the above joint debugging control method of the power generation system, performing third joint debugging control on the power generation system includes:

[0026] Judging whether the power generation load of the generator is lower than the preset power generation load;

[0027] If it is determined that the power generation load of the generator is not lower than the preset power generation load, then adjust the opening degree of the desuperheating reducing valve;

[0028] If it is determined that the load of the generator is lower than the preset power generation load, then judge whether the pressure in front of the steam turbine rises;

[0029] If it is determined that the pressure in front of the steam turbine rises, then control the steam turbine to increase the rotational speed according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the first preset speed, control the steam turbine to increase the rotational speed by the first adjustment amplitude; if the speed of the steam turbine is less than the first preset speed, control the steam turbine to increase the rotational speed by the second adjustment amplitude;

[0030] If it is determined that the pressure in front of the steam turbine does not rise, then control the steam turbine to reduce the rotational speed according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the second preset speed, control the steam turbine to reduce the rotational speed by the first adjustment amplitude; if the speed of the steam turbine is less than the second preset speed, control the steam turbine to reduce the rotational speed by the second adjustment amplitude.

[0031] Optionally, in the above joint debugging control method of the power generation system, before judging whether the pressure in front of the steam turbine rises, it further includes:

[0032] Respectively judge whether the number of times the steam turbine continuously performs the operation of increasing the rotational speed is greater than the preset continuous increase times, and whether the number of times the steam turbine continuously performs the operation of reducing the rotational speed is greater than the preset continuous reduction times;

[0033] If it is determined that the number of times the steam turbine continuously performs the operation of increasing the rotational speed is greater than the preset continuous increase times, then after the steam turbine runs in place, the number of times the steam turbine continuously performs the operation of increasing the rotational speed is cleared to zero;

[0034] If it is determined that the number of times the steam turbine continuously performs the operation of reducing the rotational speed is not greater than the preset continuous reduction times, then after the steam turbine runs in place, the number of times the steam turbine continuously performs the operation of reducing the rotational speed is cleared to zero.

[0035] The second aspect of the present application discloses a coordinated control device for a power generation system, where the power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve, and the device includes:

[0036] An acquisition unit, configured to acquire the pressure in front of the steam turbine;

[0037] A first coordinated control unit, configured to perform a first coordinated control on the power generation system if the pressure in front of the turbine is greater than a preset upper limit of the pressure in front of the turbine, and the first coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed;

[0038] A second coordinated control unit, configured to perform a second coordinated control on the power generation system if the pressure in front of the turbine is less than a preset lower limit of the pressure in front of the turbine, and the second coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to decrease its speed;

[0039] A third coordinated control unit, configured to perform a third coordinated control on the power generation system if the pressure in front of the turbine is between the preset lower limit and the preset upper limit of the pressure in front of the turbine, and the third coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed, or to control the steam turbine to decrease its speed.

[0040] The third aspect of the present application discloses an electronic device, including: a memory and a processor;

[0041] Wherein, the memory is used to store a computer program;

[0042] The processor is used to execute the computer program, and specifically used to implement the coordinated control method for the power generation system as described in any one of the first aspect.

[0043] The fourth aspect of the present application discloses a computer storage medium, used to store a computer program, and when the computer program is executed, it is specifically used to implement the coordinated control method for the power generation system as described in any one of the first aspect.

[0044] The present invention provides a coordinated control method for a power generation system. The power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. The method includes: obtaining the pressure in front of the steam turbine; if the pressure in front of the turbine is greater than the preset upper limit of the pressure in front of the turbine, performing a first coordinated control on the power generation system. The first coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed; if the pressure in front of the turbine is less than the preset lower limit of the pressure in front of the turbine, performing a second coordinated control on the power generation system. The second coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to decrease its speed; if the pressure in front of the turbine is between the preset lower limit and the preset upper limit of the pressure in front of the turbine, performing a third coordinated control on the power generation system. The third coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed, or to control the steam turbine to decrease its speed. The present application can perform coordinated control on the pressure in front of the steam turbine and the load of the generator, solving the problems of hysteresis in manual pressure control in the prior art, high risk of misoperation, and difficulty in balancing the control coupling between power generation and the stability of the pressure in front of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0046] Figure 1 It is a schematic structural diagram of a power generation system provided by the present application;

[0047] Figure 2 It is a flowchart of a coordinated control method for a power generation system provided by an embodiment of the present application;

[0048] Figure 3 It is a flowchart of another coordinated control method for a power generation system provided by an embodiment of the present application;

[0049] Figure 4 It is a schematic structural diagram of a coordinated control device for a power generation system provided by an embodiment of the present application;

[0050] Figure 5 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] The embodiments provided in this application provide a coordinated control method for a power generation system to solve the problems of hysteresis in manual pressure control, high risk of misoperation, and difficulty in balancing the control coupling between power generation and the stability of the pressure in front of the door in the existing technology.

[0053] First, it should be noted that the power generation system provided in this application at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. As Figure 1 shown, in practice, the high-temperature and high-pressure steam generated by the boiler enters the steam turbine through the steam nozzle, drives the steam turbine blades to rotate, drives the bearing to do work on the generator to generate electric energy, completes the conversion of heat energy - mechanical energy - electric energy, and the remaining steam is discharged through the steam channel and supplied to the downstream steam-using unit. The desuperheating and pressure reducing valve in the figure is a desuperheating and pressure reducing valve and also a desuperheating and pressure reducing system for the power generation system.

[0054] Please refer to Figure 2 , the coordinated control method of this power generation system mainly includes the following steps:

[0055] S101. Obtain the pressure in front of the steam turbine.

[0056] Among them, the pressure in front of the steam turbine refers to the high-pressure steam pressure entering the steam turbine, that is, the main steam pressure.

[0057] In practical applications, the actual operating parameters of the steam turbine are uploaded to the APC (Advanced Process Control) system through the OPC communication protocol, so as to obtain the pressure in front of the steam turbine, and the coordinated control method of the power generation system provided in this application is executed based on this APC system.

[0058] S102. If the pressure in front of the door is greater than the preset upper limit of the pressure in front of the door, perform the first coordinated control on the power generation system.

[0059] The first coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the generator to increase the load.

[0060] In some embodiments, the specific process of performing the first coordinated control on the power generation system is as follows, mainly including steps S201 to S203:

[0061] S201. Judge whether the power generation load of the generator is lower than the preset power generation load.

[0062] Among them, the power generation load of the generator refers to the actual output power of the generator in the power generation system at a certain moment, usually measured in kilowatts (kW) or megawatts (MW).

[0063] The preset power generation load can be the maximum load that the generator is allowed to output in the power generation system; of course, it is not limited to this, and it can also be determined according to the application environment and user requirements. This application does not make specific limitations, and all are within the protection scope of this application.

[0064] If it is determined that the power generation load of the generator is not lower than the preset power generation load, then step S202 is executed; if it is determined that the power generation load of the generator is lower than the preset power generation load, then step S203 is executed.

[0065] S202. Control the opening of the desuperheating and pressure reducing valve.

[0066] In practical applications, when the power generation load of the generator is not lower than the preset power generation load, it means that the current power generation of the power generation system has reached the maximum power generation. Continuing to be too large will affect the system stability, and it is necessary to enable the desuperheating and pressure reducing valve to stabilize the pressure in front of the steam turbine.

[0067] Specifically, the opening of the desuperheating and pressure reducing valve can be adjusted according to the situation where the power generation load of the generator exceeds the preset power generation load; for example, when the power generation load of the generator exceeds the preset power generation load by a large amount, the opening of the desuperheating and pressure reducing valve can be adjusted to 100%; when the power generation load of the generator exceeds the preset power generation load by a small amount, the opening of the desuperheating and pressure reducing valve can be adjusted to 50%.

[0068] S203. Control the steam turbine to increase the speed according to the first adjustment range.

[0069] Among them, the first adjustment range can be 1 time / 1 minute, and the single - time speed adjustment can be determined according to the application environment and user requirements, such as 8 - 10 revolutions.

[0070] Increasing the speed means using more steam for power generation by increasing the speed of the steam turbine, so as to achieve the control purpose of reducing the pressure in front and increasing the power generation load.

[0071] It can be understood that when controlling the steam turbine to increase the speed according to the first adjustment range, it can be to control the steam turbine speed to increase at a rate of 1 time / 1 minute, and the single - time speed adjustment is 8 - 10 revolutions.

[0072] In practical applications, when the power generation load of the generator is lower than the preset power generation load, it means that the current power generation of the power generation system has not reached the maximum power generation. In order to improve the power generation efficiency of the power generation system and increase the power generation, the steam turbine can be controlled to increase the speed according to the first adjustment range.

[0073] Optionally, in another embodiment of the present application, before step S203 of controlling the steam turbine to increase the speed by the first adjustment amplitude, steps S301 and S302 are further included:

[0074] S301. Determine whether the number of times the steam turbine continuously performs the operation of increasing the speed is greater than the preset continuous increase times.

[0075] Wherein, the preset continuous increase times is the upper limit value allowing the steam turbine to continuously increase the speed, and can be given according to the characteristics of the steam turbine during actual commissioning. Exemplarily, assuming that the steam turbine adjusts the speed by 8 - 10 revolutions per time, and the performance requirement of the steam turbine is that the maximum continuous adjustment in the same direction cannot exceed 60 revolutions, so the preset continuous increase times can be taken as 8.

[0076] If it is determined that the number of times the steam turbine continuously performs the operation of increasing the speed is greater than the preset increase times, then step S302 is executed; if it is determined that the number of times the steam turbine continuously performs the operation of increasing the speed is not greater than the preset increase times, then step S203 of controlling the steam turbine to increase the speed by the first adjustment amplitude can be executed.

[0077] S302. Clear the number of times the steam turbine continuously performs the operation of increasing the speed after the steam turbine runs in place.

[0078] Since the increase and decrease of the speed of the steam turbine are driven by the oil pressure to rotate the impeller, and there is a certain hysteresis affected by mechanical damping. To ensure the safe operation of the steam turbine, after continuously increasing the speed of the steam turbine, it is necessary to stop for a period of time and wait for the steam turbine to run in place before continuing to adjust, that is, clear the number of times the steam turbine continuously performs the operation of increasing the speed after the steam turbine runs in place.

[0079] S103. If the pressure in front of the door is less than the preset lower limit of the pressure in front of the door, perform the second joint adjustment control on the power generation system.

[0080] The second joint adjustment control is used to control the opening degree of the desuperheating and pressure reducing valve, or control the steam turbine to reduce the speed.

[0081] Reducing the speed means reducing the steam used for power generation by reducing the speed of the steam turbine, so as to achieve the control purpose of increasing the pressure in front of the door and decreasing the generator load.

[0082] In some embodiments, the specific process of performing the second joint adjustment control on the power generation system is as follows, mainly including steps S401 to S403:

[0083] S401. Determine whether the opening degrees of the desuperheating and pressure reducing valves are all 0%.

[0084] In practice, it can be determined whether the opening degrees of the desuperheating and pressure reducing valves are all 0% by judging the switch states of the desuperheating and pressure reducing valves, that is, all in the fully closed state.

[0085] If it is determined that the opening degrees of the desuperheating and pressure reducing valve are not all 0%, step S402 can be executed; if it is determined that the opening degrees of the desuperheating and pressure reducing valve are all 0%, step S403 can be executed.

[0086] S402. Control the opening degree of the desuperheating and pressure reducing valve to 0%.

[0087] In practice, when the pressure in front of the steam turbine is less than the preset lower limit of the pressure in front of the turbine and the opening degrees of the desuperheating and pressure reducing valve are not all 0%, it indicates that the current power generation of the power generation system has not reached the maximum power generation. The opening degree of the desuperheating and pressure reducing valve can be adjusted to control the pressure in front of the steam turbine to increase the power generation of the generator.

[0088] S403. Control the steam turbine to reduce the speed according to the first adjustment range.

[0089] The first adjustment range can be 1 time / 1 min, and the single - time speed adjustment can be determined according to the application environment and user requirements, such as 8 - 10 revolutions.

[0090] When the pressure in front of the steam turbine is less than the preset lower limit of the pressure in front of the turbine and the opening degrees of the desuperheating and pressure reducing valve are all 0%, it indicates that the current power generation of the power generation system cannot meet the required load, and it is necessary to control the steam turbine to reduce the speed according to the first adjustment range.

[0091] Optionally, in another embodiment of the present application, before step S403, controlling the steam turbine to reduce the speed according to the first adjustment range, steps S501 and S502 are further included:

[0092] S501. Judge whether the number of times the steam turbine continuously executes the speed - reducing operation is greater than the preset continuous reduction times.

[0093] Among them, the preset continuous reduction times is the upper limit value allowing the steam turbine to continuously reduce the speed operation, which can be given according to the characteristics of the steam turbine in the actual debugging process. Exemplarily, assuming that the single - time speed adjustment of the steam turbine is 8 - 10 revolutions and the performance requirement of the steam turbine for the same - direction adjustment cannot exceed 600 revolutions at most, then the preset continuous reduction times can be taken as 8.

[0094] If it is determined that the number of times the steam turbine continuously executes the speed - reducing operation is greater than the preset continuous reduction times, step S502 can be executed.

[0095] S502. After the steam turbine runs in place, clear the number of times the steam turbine continuously executes the speed - reducing operation.

[0096] Since the reduction of the steam turbine's rotational speed is driven by oil pressure to rotate the impeller, there is a certain lag due to mechanical damping. To ensure the safe operation of the steam turbine, after continuously reducing the rotational speed of the steam turbine, it is necessary to stop for a period of time and wait for the steam turbine to operate in place before continuing to adjust. That is, after the steam turbine operates in place, the number of times of continuously reducing the rotational speed of the steam turbine is cleared. The specific pause time can be determined according to the relevant characteristics of the steam turbine, such as a few minutes, etc. This application does not make specific limitations and is within the protection scope of this application.

[0097] S104. If the pressure in front of the door is between the preset lower limit of the pressure in front of the door and the preset upper limit of the pressure in front of the door, then perform the third coordinated control on the power generation system.

[0098] The pressure in front of the door is between the preset lower limit of the pressure in front of the door and the preset upper limit of the pressure in front of the door, that is, the pressure in front of the steam turbine is within the range of the upper and lower limits.

[0099] The third coordinated control is used to control the opening of the desuperheating and pressure-reducing valve, or to control the steam turbine to increase the rotational speed, or to control the steam turbine to reduce the rotational speed.

[0100] In some embodiments, the specific process of performing the third coordinated control on the power generation system is as follows, mainly including steps S601 to S605:

[0101] S601. Determine whether the power generation load of the generator is lower than the preset power generation load.

[0102] Regarding the specific process of step S601, reference can be made to the above step S201, which will not be elaborated here.

[0103] If it is determined that the power generation load of the generator is not lower than the preset power generation load, then perform step S602; if it is determined that the load of the generator is lower than the preset power generation load, then perform step S603.

[0104] S602. Adjust the opening of the desuperheating and pressure-reducing valve.

[0105] Regarding the specific process of step S602, reference can be made to the above step S202, which will not be elaborated here.

[0106] S603. Determine whether the pressure in front of the steam turbine rises.

[0107] In practical applications, the pressure in front of the steam turbine at two consecutive moments can be compared to determine whether the pressure in front of the steam turbine rises. When the pressure in front of the steam turbine at the latter moment is greater than the pressure in front of the steam turbine at the former moment, it is determined that the pressure in front of the steam turbine rises; otherwise, it is determined that the pressure in front of the steam turbine does not rise.

[0108] If it is determined that the pressure in front of the steam turbine has risen, then step S604 is executed; if it is determined that the pressure in front of the steam turbine has not risen, then step S605 is executed.

[0109] S604. Control the steam turbine to increase the rotational speed according to the speed of the steam turbine.

[0110] Among them, if the speed of the steam turbine is greater than or equal to the first preset speed, control the steam turbine to increase the rotational speed according to the first adjustment amplitude; if the speed of the steam turbine is less than the first preset speed, control the steam turbine to increase the rotational speed according to the second adjustment amplitude.

[0111] The first preset speed can be determined according to the trend suppression corresponding to a single adjustment of the steam turbine. Through testing, it is known that the trend suppression corresponding to a single adjustment of the rotational speed of the steam turbine is about 0.6 - 0.8 MPa / 1 min. In order to prevent the steam turbine from being in the adjustment state all the time, 0.15 MPa / 1 min can be selected as the adjustment critical point. If it exceeds, the rotational speed is increased according to the first adjustment amplitude, and if it does not exceed, the rotational speed is increased according to the second adjustment amplitude, so as to suppress the rapid rise of the pressure in front of the steam turbine.

[0112] The first adjustment amplitude can be 1 time / 1 min, and the second adjustment amplitude can be 1 time / 2 min. The single adjustment of the rotational speed can be determined according to the application environment and user requirements, such as 8 - 10 revolutions.

[0113] It can be understood that when controlling the steam turbine to increase the rotational speed according to the first adjustment amplitude, it can be to control the rotational speed of the steam turbine to increase at a rate of 1 time / 1 min, and the single adjustment of the rotational speed is 8 - 10 revolutions. When controlling the steam turbine to increase the rotational speed according to the second adjustment amplitude, it can be to control the rotational speed of the steam turbine to increase at a rate of 1 time / 2 min, and the single adjustment of the rotational speed is 8 - 10 revolutions.

[0114] It should be noted that since the rate of increasing the rotational speed of the steam turbine corresponding to the first adjustment amplitude and the second adjustment amplitude is once every 1 - 2 minutes, the change rate of the pressure in front of the steam turbine per minute can be used as the adjustment target of the steam turbine. Through testing, it is known that the trend suppression corresponding to a single adjustment of the rotational speed of the steam turbine is about 0.6 - 0.8 MPa / 1 min. In order to prevent the steam turbine from being in the adjustment state all the time, 0.15 MPa / 1 min can be selected as the adjustment critical point.

[0115] S605. Control the steam turbine to decrease the rotational speed according to the speed of the steam turbine.

[0116] Among them, if the speed of the steam turbine is greater than or equal to the second preset speed, control the steam turbine to decrease the rotational speed according to the first adjustment amplitude; if the speed of the steam turbine is less than the second preset speed, control the steam turbine to decrease the rotational speed according to the second adjustment amplitude.

[0117] The second preset rate can be determined according to the trend suppression corresponding to a single adjustment of the steam turbine. Through testing, it is known that the trend suppression corresponding to a single adjustment of the steam turbine speed is about -0.6 to -0.8 MPa / 1 min. To prevent the steam turbine from being in the adjustment state all the time, -0.15 MPa / 1 min can be selected as the adjustment critical point. If it exceeds, the speed is reduced according to the first adjustment amplitude; if it does not exceed, the speed is reduced according to the second adjustment amplitude, so as to suppress the rapid rise of the pressure in front of the steam turbine.

[0118] The first adjustment amplitude can be 1 time / 1 min, and the second adjustment amplitude can be 1 time / 2 min. The single adjustment speed can be determined according to the application environment and user needs, such as 8 - 10 revolutions.

[0119] It can be understood that when controlling the steam turbine to reduce the speed according to the first adjustment amplitude, it can be to control the steam turbine speed to decrease at a rate of 1 time / 1 min, and the single adjustment speed is 8 - 10 revolutions. When controlling the steam turbine to reduce the speed according to the second adjustment amplitude, it can be to control the steam turbine speed to decrease at a rate of 1 time / 2 min, and the single adjustment speed is 8 - 10 revolutions.

[0120] Optionally, in another embodiment of the present application, before step S603, determining whether the pressure in front of the steam turbine rises, steps S701 to S703 are further included:

[0121] S701: Respectively judge whether the number of times the steam turbine continuously performs the operation of increasing the speed is greater than the preset continuous increase number, and whether the number of times the steam turbine continuously performs the operation of decreasing the speed is greater than the preset continuous decrease number.

[0122] For the specific process of judging whether the number of times the steam turbine continuously performs the operation of increasing the speed is greater than the preset continuous increase number, reference can be made to step S301 above, which will not be elaborated here.

[0123] The preset continuous decrease number is the upper limit value allowing the steam turbine to continuously perform the operation of decreasing the speed, and can be given according to the characteristics of the steam turbine in the actual debugging process. Exemplarily, assuming that the single adjustment speed of the steam turbine is 8 - 10 revolutions and the performance requirement of the steam turbine is that the maximum continuous adjustment in the same direction cannot exceed 60 revolutions, then the preset continuous decrease number can be taken as 8.

[0124] If it is judged that the number of times the steam turbine continuously performs the operation of increasing the speed is greater than the preset continuous increase number, then step S702 can be executed; if it is judged that the number of times the steam turbine continuously performs the operation of decreasing the speed is not greater than the preset continuous decrease number, then step S703 can be executed.

[0125] S702: After the steam turbine runs in place, clear the number of times the steam turbine continuously performs the operation of increasing the speed.

[0126] The specific process of clearing the number of times the steam turbine continuously performs the operation of increasing the rotational speed after the steam turbine is in place can be referred to the above step S302, which will not be elaborated here.

[0127] S703. After the steam turbine is in place, clear the number of times the steam turbine continuously performs the operation of decreasing the rotational speed.

[0128] The specific process of clearing the number of times the steam turbine continuously performs the operation of decreasing the rotational speed after the steam turbine is in place can be referred to the above step S502, which will not be elaborated here.

[0129] Combined with the above, it can be seen that the present application can integrate the operation data of devices such as steam turbines, generators, and desuperheating and pressure reducing valves in the power generation system based on the OPC communication interface to achieve joint debugging and control. During the process of adjusting the rotational speed of the steam turbine, through the dynamic intervention of the desuperheating and pressure reducing valve in the intelligent collaborative power generation system, the continuous climb of the pressure in front of the steam turbine is effectively suppressed under the full load condition of the generator, breaking through the traditional rotational speed adjustment bottleneck, and realizing flexible and stable control of the pressure in front of the steam turbine within the safety margin.

[0130] Moreover, when the pressure in front of the steam turbine drops and load reduction is required, the desuperheating and pressure reducing valve is preferentially shut down to reduce the diversion of high-quality steam and maximize the main steam power generation efficiency.

[0131] In addition, based on the dynamic change efficiency and operating condition range of the pressure in front of the steam turbine, a hierarchical adaptive adjustment strategy is adopted to achieve the optimal balance between equipment life and operating safety.

[0132] Based on the above principle, for the joint debugging control method of the power generation system provided in this embodiment, the power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. The method includes: obtaining the pressure in front of the steam turbine; if the pressure in front of the steam turbine is greater than the preset upper limit of the pressure in front of the steam turbine, perform the first joint debugging control on the power generation system, and the first joint debugging control is used to control the opening of the desuperheating and pressure reducing valve, or control the steam turbine to increase the rotational speed; if the pressure in front of the steam turbine is less than the preset lower limit of the pressure in front of the steam turbine, perform the second joint debugging control on the power generation system, and the second joint debugging control is used to control the opening of the desuperheating and pressure reducing valve, or control the steam turbine to decrease the rotational speed; if the pressure in front of the steam turbine is between the preset lower limit and the preset upper limit of the pressure in front of the steam turbine, perform the third joint debugging control on the power generation system, and the third joint debugging control is used to control the opening of the desuperheating and pressure reducing valve, or control the steam turbine to increase the rotational speed, or control the steam turbine to decrease the rotational speed, that is, the present application performs one of the first joint debugging control, the second joint debugging control, and the third joint debugging control on the power generation system according to the relationship between the pressure in front of the steam turbine and the preset upper and lower limits of the pressure in front of the steam turbine, and can perform joint debugging control on the pressure in front of the steam turbine and the generator load, solving the problems of hysteresis in the existing manual pressure control, high risk of misoperation, and difficulty in taking into account the control coupling between power generation and the stability of the pressure in front of the steam turbine.

[0133] The OPC communication interface features high stability and millisecond-level real-time performance. By connecting to the data acquisition ports of various devices in the power generation system through the OPC communication interface, a corresponding global data integration platform for the power generation system is constructed, realizing unified data acquisition, real-time monitoring, and intelligent precise control of multi-source heterogeneous devices. Therefore, the scope of application of this application is extremely wide, and it is applicable to the construction and implementation of the joint debugging and control system of steam turbine units and generator sets in any scenario, with universality.

[0134] The linkage relationship among the steam turbine speed (n), the pressure in front of the steam turbine (P), and the power generation load (L) is: n↑→P↓L↑, n↓→P↑L↓. This application fully considers the coupling correlation between the change in pressure in front of the turbine and the change in power generation, breaks the conventional control method, and innovatively introduces an adaptive dynamic compensation mechanism for the desuperheating and pressure-reducing system. This makes the entire control process more robust, with better stability of the pressure in front of the turbine, and realizes stable operation within the full operating conditions.

[0135] This application can monitor the operating parameters of steam turbines and generators in real time, autonomously balance the power generation load and the pressure in front of the turbine, and maximize the utilization of thermal energy on the premise of ensuring the optimal power generation.

[0136] It is worth noting that through the inventor's research, it is found that the existing manual pressure control process has high requirements for personnel coordination, large operating labor intensity (the number of operations is as high as 600 times per day), rough operation, easy to make mistakes, poor safety, easy to cause fluctuations in the back-end pressure, inconsistent operation methods among different teams, and the production process is significantly affected by the steam consumption of downstream units. In addition, the traditional steam turbine speed regulation requires operators to comprehensively evaluate multi-dimensional parameters such as power generation load, exhaust pressure, adjustment interval, and continuous adjustment times manually. The process is complex and there are risks of subjective differences. The adjustment logics and amplitudes of different teams are inconsistent, which is prone to hidden dangers of control instability. Based on the unified data platform, this application monitors key parameters in real time and solidifies the optimal adjustment logic through a standardized control strategy, realizing safe, long-cycle, and energy-efficiency-optimal closed-loop control, and completely eliminating the uncertainty of manual operation.

[0137] It can be understood that this application integrates key process data such as steam turbine speed control, generator load, and desuperheating and pressure-reducing valve regulation on the APC host computer by means of the OPC communication protocol to achieve data integration. Through the APC data platform, the system data is monitored in real time. When the pressure in front of the steam turbine changes, a joint debugging control method is adopted to solve the self-balancing control problem of the strongly coupled process parameters of the generator load and the pressure in front of the steam turbine; avoid the shortening of the service life of key equipment caused by frequent actions of the steam turbine speed, and ensure the equipment usage cycle; realize "unattended" throughout the steam turbine adjustment process, and fully realize the automatic operation of the steam turbine; overcome the characteristic of the steam turbine speed response delay during the up and down speed jogging adjustment process.

[0138] Combined with the above, please refer to Figure 3, the implementation process of the coordinated control method for the power generation system provided in this embodiment in specific applications is as follows:

[0139] S1001: When the real-time data monitors that the pressure in front of the steam turbine exceeds the upper pressure limit, clear the number of recorded speed reduction times M.

[0140] S1002: Determine whether the power generation load of the generator is lower than the preset power generation load, that is, determine whether the power generation load of the generator reaches the maximum power generation capacity allowed by the system.

[0141] S1003: If the power generation load reaches the maximum power generation load, control the desuperheating and pressure reducing system to achieve stable control of the pressure in front of the door.

[0142] S1004: Detect whether the number of consecutive speed increase operations (pressing the load increase button) has increased continuously N times.

[0143] S1005: If the steam turbine has increased the speed continuously N times, it is necessary to wait T minutes according to different steam turbine characteristics and then clear the number of consecutive load increase times N to zero.

[0144] S1006: If the number of consecutive speed increases of the steam turbine is less than N times, continuously increase the speed of the steam turbine at a frequency of 1 time per minute, and accumulate N each time of adjustment.

[0145] S2001: When the real-time data monitors that the pressure in front of the steam turbine is within the upper and lower limit range, that is, between the preset upper pressure limit in front of the door and the preset lower pressure limit.

[0146] S2002: Determine whether the power generation load of the generator is lower than the preset power generation load, that is, determine whether the power generation load of the generator reaches the maximum power generation capacity allowed by the system.

[0147] S2003: If the power generation is at the maximum power generation load, control the desuperheating and pressure reducing system to achieve stable control of the pressure in front of the door.

[0148] S2004: Detect whether the number of consecutive speed increase operations (pressing the load increase button) has increased continuously N times, or whether the number of consecutive speed decrease operations (pressing the load decrease button) has increased continuously M times.

[0149] S2005: If the load increase button has been continuously increased N times or the load decrease button has been continuously decreased M times, it is necessary to wait T minutes according to different steam turbine characteristics and then clear the number of speed increase / decrease times N / M to zero.

[0150] S2006: Determine whether the pressure in front of the steam turbine is continuously rising or continuously falling.

[0151] S2007: When it is detected that the pressure in front of the door rises, clear the load reduction count M, and determine whether the rising trend of the pressure in front of the door is greater than 0.15 MPa / 1 min.

[0152] S2009: When the rising trend of the pressure in front of the door is less than 0.15 MPa / 1 min, increase the speed of the steam turbine at a rate of 1 time / 2 min, and accumulate N once for each adjustment.

[0153] S2010: When the rising trend of the pressure in front of the door is greater than 0.15 MPa / 1 min, increase the speed of the steam turbine at a rate of 1 time / 1 min, and accumulate N once for each adjustment.

[0154] S2008: When it is detected that the pressure in front of the door drops, clear the load increase count N, and determine whether the dropping trend of the pressure in front of the door is less than -0.15 MPa / 1 min.

[0155] S2011: When the dropping trend of the pressure in front of the door is greater than -0.15 MPa / 1 min, increase or decrease the speed of the steam turbine at a rate of 1 time / 2 min, and accumulate M once for each adjustment.

[0156] S2012: When the rising trend of the pressure in front of the door is less than 0.15 MPa / 1 min, increase or decrease the speed of the steam turbine at a rate of 1 time / 1 min, and accumulate M once for each adjustment.

[0157] S3001: When the real-time data monitors that the pressure in front of the steam turbine is lower than the lower pressure limit, clear the number of records of speed increase and decrease N.

[0158] S3002: Determine whether the valves of the desuperheating and pressure reducing system are all closed, that is, determine whether the opening degree of the desuperheating and pressure reducing valve is 0%.

[0159] S3003: First, use the desuperheating and pressure reducing valve to control the pressure in front of the door until the desuperheating and pressure reducing valve is fully closed.

[0160] S3004: Determine whether the steam turbine speed reduction count exceeds M times.

[0161] S3005: When the steam turbine continuously reduces the load by more than M times, the system waits for T minutes and then clears M.

[0162] S3006: When the steam turbine continuously reduces the load by less than M times, reduce the speed at a frequency of 1 time / 1 min, and accumulate 1 time of M for each adjustment.

[0163] It should be noted that the above is only an example of the present application in actual application. In specific applications, it can also be deformed according to the actual application environment and user requirements, and all are within the protection scope of the present application.

[0164] Optionally, another embodiment of the present application further provides a coordinated control device for a power generation system, where the power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. Please refer to Figure 4 , the device includes:

[0165] An acquisition unit 101, configured to acquire the pressure in front of the steam turbine;

[0166] A first coordinated control unit 102, configured to perform a first coordinated control on the power generation system if the pressure in front of the turbine is greater than a preset upper limit of the pressure in front of the turbine. The first coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed;

[0167] A second coordinated control unit 103, configured to perform a second coordinated control on the power generation system if the pressure in front of the turbine is less than a preset lower limit of the pressure in front of the turbine. The second coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to decrease its speed;

[0168] A third coordinated control unit 104, configured to perform a third coordinated control on the power generation system if the pressure in front of the turbine is between the preset lower limit and the preset upper limit of the pressure in front of the turbine. The third coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its speed, or to control the steam turbine to decrease its speed.

[0169] In some embodiments, the first coordinated control unit 102 is specifically configured to:

[0170] Judge whether the power generation load of the generator is lower than a preset power generation load;

[0171] If it is judged that the power generation load of the generator is not lower than the preset power generation load, then control the opening of the desuperheating and pressure reducing valve;

[0172] If it is judged that the load of the generator is lower than the preset power generation load, then control the steam turbine to increase its speed by a first adjustment range.

[0173] In some embodiments, before the first coordinated control unit 102 is used to control the steam turbine to increase its speed, it is further used to:

[0174] Judge whether the number of times the steam turbine continuously performs the operation of increasing its speed is greater than a preset number of continuous increases;

[0175] If it is judged that the number of times the steam turbine continuously performs the operation of increasing its speed is greater than the preset number of continuous increases, then clear the number of times the steam turbine continuously performs the operation of increasing its speed after the steam turbine runs in place.

[0176] In some embodiments, the second coordinated control unit 103 is specifically configured to:

[0177] Judge whether the opening of the desuperheating and pressure reducing valve is 0%;

[0178] If it is determined that the opening degree of the desuperheating and pressure reducing valve is not 0%, then control the opening degree of the desuperheating and pressure reducing valve to 0%.

[0179] If it is determined that the opening degrees of the desuperheating and pressure reducing valve are all 0%, then control the steam turbine to reduce the rotational speed according to the first adjustment range.

[0180] In some embodiments, before the second coordinated control unit 103 is used to control the steam turbine to reduce the rotational speed according to the first adjustment range, it is further used for:

[0181] Judge whether the number of times the steam turbine continuously executes the operation of reducing the rotational speed is greater than the preset continuous reduction times;

[0182] If it is determined that the number of times the steam turbine continuously executes the operation of reducing the rotational speed is greater than the preset continuous reduction times, then clear the number of times the steam turbine continuously executes the operation of reducing the rotational speed after the steam turbine runs in place.

[0183] In some embodiments, the third coordinated control unit 104 is specifically used for:

[0184] Judge whether the power generation load of the generator is lower than the preset power generation load;

[0185] If it is determined that the power generation load of the generator is not lower than the preset power generation load, then adjust the opening degree of the desuperheating and pressure reducing valve;

[0186] If it is determined that the load of the generator is lower than the preset power generation load, then judge whether the pressure in front of the steam turbine rises;

[0187] If it is determined that the pressure in front of the steam turbine rises, then control the steam turbine to increase the rotational speed according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the first preset speed, then control the steam turbine to increase the rotational speed according to the first adjustment range; if the speed of the steam turbine is less than the first preset speed, then control the steam turbine to increase the rotational speed according to the second adjustment range;

[0188] If it is determined that the pressure in front of the steam turbine does not rise, then control the steam turbine to reduce the rotational speed according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the second preset speed, then control the steam turbine to reduce the rotational speed according to the first adjustment range; if the speed of the steam turbine is less than the second preset speed, then control the steam turbine to reduce the rotational speed according to the second adjustment range.

[0189] In some embodiments, before the third coordinated control unit 104 is used to judge whether the pressure in front of the steam turbine rises, it is further used for:

[0190] Respectively judge whether the number of times the steam turbine continuously executes the operation of increasing the rotational speed is greater than the preset continuous increase times, and whether the number of times the steam turbine continuously executes the operation of reducing the rotational speed is greater than the preset continuous reduction times;

[0191] If it is determined that the number of times the steam turbine continuously performs the operation of increasing the rotational speed is greater than the preset continuous increase times, then after the steam turbine runs in place, the number of times the steam turbine continuously performs the operation of increasing the rotational speed is cleared;

[0192] If it is determined that the number of times the steam turbine continuously performs the operation of decreasing the rotational speed is not greater than the preset continuous decrease times, then after the steam turbine runs in place, the number of times the steam turbine continuously performs the operation of decreasing the rotational speed is cleared.

[0193] The coordinated control device of the power generation system provided in this embodiment, the power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. The device includes: an acquisition unit 101 for acquiring the pressure in front of the steam turbine; a first coordinated control unit 102 for performing a first coordinated control on the power generation system if the pressure in front of the turbine is greater than the preset upper limit of the pressure in front of the turbine. The first coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase the rotational speed; a second coordinated control unit 103 for performing a second coordinated control on the power generation system if the pressure in front of the turbine is less than the preset lower limit of the pressure in front of the turbine. The second coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to decrease the rotational speed; a third coordinated control unit 104 for performing a third coordinated control on the power generation system if the pressure in front of the turbine is between the preset lower limit of the pressure in front of the turbine and the preset upper limit of the pressure in front of the turbine. The third coordinated control is used to control the opening of the desuperheating and pressure reducing valve, or to control the steam turbine to increase the rotational speed, or to control the steam turbine to decrease the rotational speed. This application can perform coordinated control on the pressure in front of the steam turbine and the load of the generator, solving the problems of hysteresis in manual pressure control, high risk of misoperation, and difficulty in balancing the control coupling between power generation and the stability of the pressure in front of the turbine.

[0194] It should be noted that for the relevant descriptions of each unit in the coordinated control device of the power generation system, reference can be made to the corresponding method embodiments above, and details will not be repeated here.

[0195] Optionally, another embodiment of the present application further provides a computer storage medium for storing a computer program, which is specifically used to implement the coordinated control method of the power generation system provided in any embodiment of the present application when the computer program is executed.

[0196] It should be noted that for the relevant descriptions of the coordinated control method of the power generation system, reference can be made to the above embodiments, and details will not be repeated here.

[0197] Optionally, another embodiment of the present application further provides an electronic device, as Figure 5 shown, the electronic device includes a memory 601 and a processor 602.

[0198] Among them, the memory 601 is used to store a computer program;

[0199] The processor 602 is used to execute a computer program, and specifically to implement the coordinated control method of the power generation system provided in any embodiment of the present application.

[0200] It should be noted that for the relevant description of the coordinated control method of the power generation system, reference may also be made to the above embodiments, and details will not be repeated here.

[0201] The features described in each embodiment of this specification can be replaced or combined with each other. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the relevant parts, reference can be made to the partial description of the method embodiment. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts. Professionals can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0202] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0203] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A coordinated control method for a power generation system, characterized in that, The power generation system at least includes: a steam turbine, a generator, and a desuperheating and pressure reducing valve. The method includes: Obtaining the pressure in front of the steam turbine; If the pressure in front of the steam turbine is greater than the preset upper limit of the pressure in front of the steam turbine, perform first coordinated control on the power generation system. The first coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its rotational speed; If the pressure in front of the steam turbine is less than the preset lower limit of the pressure in front of the steam turbine, perform second coordinated control on the power generation system. The second coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to decrease its rotational speed; If the pressure in front of the steam turbine is between the preset lower limit and the preset upper limit of the pressure in front of the steam turbine, perform third coordinated control on the power generation system. The third coordinated control is used to control the opening degree of the desuperheating and pressure reducing valve, or to control the steam turbine to increase its rotational speed, or to control the steam turbine to decrease its rotational speed.

2. The joint debugging control method of the power generation system according to claim 1, characterized in that Performing first coordinated control on the power generation system includes: Judging whether the power generation load of the generator is lower than the preset power generation load; If it is judged that the power generation load of the generator is not lower than the preset power generation load, control the opening degree of the desuperheating and pressure reducing valve; If it is judged that the load of the generator is lower than the preset power generation load, control the steam turbine to increase its rotational speed by a first adjustment amplitude.

3. The joint debugging control method of the power generation system according to claim 2, wherein Before controlling the steam turbine to increase its rotational speed, it further includes: Judging whether the number of times the steam turbine continuously performs the operation of increasing its rotational speed is greater than the preset number of continuous increases; If it is judged that the number of times the steam turbine continuously performs the operation of increasing its rotational speed is greater than the preset number of continuous increases, clear the number of times the steam turbine continuously performs the operation of increasing its rotational speed after the steam turbine runs in place.

4. The joint debugging control method of the power generation system according to claim 1, characterized in that, Performing second coordinated control on the power generation system includes: Judging whether the opening degrees of the desuperheating and pressure reducing valves are all 0%; If it is judged that the opening degrees of the desuperheating and pressure reducing valves are not all 0%, control the opening degrees of the desuperheating and pressure reducing valves to be 0%; If it is judged that the opening degrees of the desuperheating and pressure reducing valves are all 0%, control the steam turbine to decrease its rotational speed by a first adjustment amplitude.

5. The joint debugging control method of the power generation system according to claim 4, characterized in that Before controlling the steam turbine to decrease its rotational speed by a first adjustment amplitude, it further includes: Judging whether the number of times the steam turbine continuously performs the operation of decreasing its rotational speed is greater than the preset number of continuous decreases; If it is judged that the number of times the steam turbine continuously performs the operation of decreasing its rotational speed is greater than the preset number of continuous decreases, clear the number of times the steam turbine continuously performs the operation of decreasing its rotational speed after the steam turbine runs in place.

6. The joint debugging control method of the power generation system according to claim 1, characterized in that, Performing third coordinated control on the power generation system includes: Judging whether the power generation load of the generator is lower than the preset power generation load; If it is judged that the power generation load of the generator is not lower than the preset power generation load, adjust the opening degree of the desuperheating and pressure reducing valve; If it is judged that the load of the generator is lower than the preset power generation load, judge whether the pressure in front of the steam turbine rises; If it is determined that the pressure in front of the steam turbine rises, the rotation speed of the steam turbine is controlled to increase according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the first preset speed, the steam turbine is controlled to increase the rotation speed by the first adjustment range; if the speed of the steam turbine is less than the first preset speed, the steam turbine is controlled to increase the rotation speed by the second adjustment range. If it is determined that the pressure in front of the steam turbine does not rise, the rotation speed of the steam turbine is controlled to decrease according to the speed of the steam turbine; wherein, if the speed of the steam turbine is greater than or equal to the second preset speed, the steam turbine is controlled to decrease the rotation speed by the first adjustment range; if the speed of the steam turbine is less than the second preset speed, the steam turbine is controlled to decrease the rotation speed by the second adjustment range.

7. The joint debugging control method of the power generation system according to claim 6, characterized in that Before determining whether the pressure in front of the steam turbine rises, it further includes: Respectively determining whether the number of times the steam turbine continuously performs the operation of increasing the rotation speed is greater than the preset continuous increase times, and whether the number of times the steam turbine continuously performs the operation of decreasing the rotation speed is greater than the preset continuous decrease times; If it is determined that the number of times the steam turbine continuously performs the operation of increasing the rotation speed is greater than the preset continuous increase times, the number of times the steam turbine continuously performs the operation of increasing the rotation speed is cleared after the steam turbine runs in place; If it is determined that the number of times the steam turbine continuously performs the operation of decreasing the rotation speed is not greater than the preset continuous decrease times, the number of times the steam turbine continuously performs the operation of decreasing the rotation speed is cleared after the steam turbine runs in place.

8. A coordinated control device for a power generation system, characterized in that, The power generation system at least includes: a steam turbine, a generator, and a desuperheating pressure reducing valve, and the device includes: An acquisition unit for acquiring the pressure in front of the steam turbine; A first coordinated control unit for performing a first coordinated control on the power generation system if the pressure in front of the turbine is greater than the preset upper limit of the pressure in front of the turbine, and the first coordinated control is used to control the opening of the desuperheating pressure reducing valve, or to control the steam turbine to increase the rotation speed; A second coordinated control unit for performing a second coordinated control on the power generation system if the pressure in front of the turbine is less than the preset lower limit of the pressure in front of the turbine, and the second coordinated control is used to control the opening of the desuperheating pressure reducing valve, or to control the steam turbine to decrease the rotation speed; A third coordinated control unit for performing a third coordinated control on the power generation system if the pressure in front of the turbine is between the preset lower limit of the pressure in front of the turbine and the preset upper limit of the pressure in front of the turbine, and the third coordinated control is used to control the opening of the desuperheating pressure reducing valve, or to control the steam turbine to increase the rotation speed, or to control the steam turbine to decrease the rotation speed.

9. An electronic device, characterized in that, It includes: A memory and a processor; Wherein, the memory is used to store a computer program; The processor is used to execute the computer program, and specifically used to implement the coordinated control method of the power generation system according to any one of claims 1-7.

10. A computer storage medium, characterized in that, For storing a computer program, when the computer program is executed, it is specifically used to implement the coordinated control method of the power generation system according to any one of claims 1-7.

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