An automatic water draining system for condenser vacuuming and its control method

Abstract

The present invention discloses a condenser vacuum automatic water discharge system and a control method thereof, which relates to the technical field of condenser vacuum discharge, and includes an air extraction module, which includes an air extraction unit and an air extraction pipeline for connecting the air extraction unit and the condenser; and a water storage module, which includes a water storage tank and a water discharge pipeline, wherein the water storage tank has a closed water storage cavity inside, and the water storage tank is provided with a water inlet, an exhaust port and a drain port intersecting the water storage cavity, one end of the water discharge pipeline is connected to the water inlet of the water storage tank, and the other end of the water discharge pipeline is connected to and communicated with the air extraction pipeline. By setting a control module, the water discharge valve, the exhaust valve and the drain valve are automatically controlled, so that the automatic discharge of the accumulated water in the condenser vacuum discharge pipeline is realized, the manual intervention is reduced, and the work efficiency is improved; further, by timely discharging the accumulated water in the vacuum discharge pipeline, the pipeline flow area can be reduced, and the influence on the operating efficiency of the vacuum system can be avoided, thereby improving the overall operating efficiency of the thermal power generator set.

Description

Technical Field

[0001] The invention relates to the technical field of condenser vacuum pumping, and in particular to a condenser vacuum pumping automatic water discharge system and a control method thereof. Background Art

[0002] In a thermal power generating unit, steam condenses in the condenser after the turbine does work, and is sent to the boiler for circulation after a series of temperature and pressure increases. During the operation of the unit, a vacuum device is required to continuously discharge the non-condensable gas in the condenser to maintain the condenser vacuum and improve the operating efficiency of the unit. Due to its layout, the vacuum pipeline may form water accumulation at low points, thereby reducing the pipeline flow area and affecting the operating efficiency of the vacuum system. Therefore, timely discharge of water accumulation in the vacuum pipeline is of great significance to the operation of thermal power units.

[0003] At present, the vacuum pumping system of thermal power plants usually uses manual water discharge, which has the disadvantages of not being able to discharge the accumulated water in the vacuum pipe in time, and also lacking the means to monitor the accumulated water in the vacuum pipe. In this regard, there is an urgent need for a set of automatic water discharge system for condenser vacuum pipes, which can not only realize the timely monitoring and discharge of accumulated water, but also liberate labor to a certain extent, improve the operating efficiency of thermal power generating units and the work efficiency of personnel. During the operation of the condenser vacuum pumping system of thermal power plants, water will accumulate at the low point of the pipe, affecting the operating efficiency of the vacuum pumping system and the cycle efficiency of the generating unit. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the current lack of monitoring means for water accumulation in vacuum pipes, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a condenser vacuum automatic water discharge system, comprising: a vacuum module, which includes a vacuum unit and a vacuum pipe for connecting the vacuum unit and the condenser; and a water storage module, which includes a water storage tank and a water discharge pipe, the water storage tank has a closed water storage chamber inside, the water storage tank is provided with a water inlet, an exhaust port and a drain port intersecting the water storage chamber, one end of the water discharge pipe is connected to the water inlet of the water storage tank, and the other end of the water discharge pipe is connected to and communicates with the vacuum pipe.

[0007] As a preferred solution of the condenser vacuum automatic drain system of the present invention, a drain valve is installed on the drain pipe.

[0008] As a preferred solution of the condenser vacuum automatic water draining system of the present invention, wherein: the exhaust port of the water storage tank is connected to an exhaust pipe, and an exhaust valve is installed on the exhaust pipe; the drain port of the water storage tank is connected to a drain pipe, and a drain valve is installed on the drain pipe.

[0009] As a preferred solution of the condenser vacuum automatic water discharge system of the present invention, a liquid level measuring mechanism is provided in the water storage chamber for measuring the liquid level height in the water storage chamber.

[0010] As a preferred solution of the condenser vacuum automatic draining system of the present invention, it also includes a control module, which can control the drain valve, exhaust valve, and water drain valve according to the liquid level height inside the water storage chamber collected by the liquid level measuring mechanism.

[0011] In order to solve the above technical problems, the present invention also provides the following technical solutions: a control method for a condenser vacuum automatic water discharge system, applied to the control module, specifically comprising the following steps:

[0012] Obtain the system's past operation logs to obtain the past power generation of the air extraction unit, the past water level of the water storage tank, and the past status of each valve;

[0013] According to the past power generation of the pumping unit, the past water level value of the water tank and the past status of the valve in different time periods, several reference sets of past water discharge system status are constructed;

[0014] Marking the past state of the valve in each past water discharge system state reference set as the past valve drive reference strategy, and constructing a first valve drive reference strategy generation model based on a number of past water discharge system state reference sets;

[0015] The current power generation of the pumping unit and the current water level of the water tank are obtained, and the current power generation and the current water level of the water tank are analyzed by the first valve driving reference strategy generation model to obtain the corresponding first valve driving reference strategy;

[0016] Performing a first evaluation on the first valve driving reference strategy according to the single opening and closing time standards preset for different valves;

[0017] According to the preset opening and closing frequency standards of different valves, the first valve driving reference strategy is evaluated for the second time;

[0018] Based on the first evaluation and the second evaluation of the first valve driving reference strategy, obtaining a first preferred value of the first valve driving reference strategy;

[0019] According to the first evaluation and the second evaluation of the first valve driving reference strategy, the driving characteristics of different valves are adjusted, and a plurality of second valve driving reference strategies are generated;

[0020] Performing a first evaluation and a second evaluation on a plurality of second valve driving reference strategies respectively to obtain second preferred values ​​of the plurality of second valve driving reference strategies, and sorting the plurality of second valve driving strategies in application order based on the magnitude of the second preferred values ​​to generate a preferred sequence;

[0021] The optimal second valve driving strategy replaces the corresponding first valve driving strategy in the first valve driving reference strategy generation model, and the first valve driving reference strategy generation model at this time is recorded as the updated valve driving reference strategy generation model.

[0022] As a preferred solution of the control method of the present invention, the method of constructing the first valve driving reference strategy generation model includes:

[0023] Establishing a first time axis for past water tank water level values ​​and past valve states in different time periods, and marking the water tank water level values, valve states, and the duration and start times of the states in different time periods on the first time axis, and generating a number of water tank water level value marking points and valve state marking points;

[0024] Establishing a first time reference line for past power generation, and generating a past power generation curve with the first time reference line as the horizontal coordinate;

[0025] The power generation curve of the past power generation curve is aligned with the first time axis, and an association relationship is established between different curve segments on the past power generation curve and different water tank water level value mark points and valve status mark points on the first time axis.

[0026] As a preferred solution of the control method of the present invention, the formula for calculating the preferred value of the valve drive reference strategy is:

[0027]

[0028] Where A is the optimal value of the valve drive reference strategy, a1 is the conversion coefficient of the first optimal value, a2 is the conversion coefficient of the second optimal value, t i is the reference single opening and closing time, t0 is the standard single opening and closing time, f i is the reference opening and closing frequency, and f0 is the difference configuration of the standard opening and closing frequency.

[0029] As a preferred embodiment of the control method described in the present invention, when the updated valve drive reference strategy generation model outputs the second valve drive strategy, the water level value of the water tank is monitored. If the water level value of the water tank is higher than the warning value, the second valve drive strategy that is ranked next in the preferred sequence replaces the original second valve drive strategy.

[0030] As a preferred embodiment of the control method described in the present invention, the specific content of the valve driving strategy includes determining the influence relationship between several valves and determining the opening and closing order, determining the time nodes for opening and closing of several valves, and recording the single opening and closing time, and driving according to the time nodes for opening and closing of the valves.

[0031] The beneficial effects of the present invention are as follows: the system realizes automatic discharge of water accumulated in the condenser vacuum pipeline by setting a control module to automatically control the drain valve, the exhaust valve and the water drain valve, thereby reducing manual intervention and improving work efficiency; further, by timely discharging the accumulated water in the vacuum pipeline, the pipeline flow area can be reduced to avoid affecting the operating efficiency of the vacuum system, thereby improving the overall operating efficiency of the thermal power generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0033] Figure 1 It is a structural schematic diagram of the condenser vacuum automatic water draining system of the present invention.

[0034] In the figure: 100, air extraction module; 101, air extraction unit; 102, air extraction pipeline; 102a, first air extraction pipe; 102b, second air extraction pipe; 200, water storage module; 201, water storage tank; 202, water discharge pipeline; 201a, water storage chamber; 202a, first water discharge pipe; 202b, second water discharge pipe; 203, exhaust pipeline; 204, exhaust valve; 205, drainage pipeline; 206, drainage valve; 207, water discharge valve; 207a, first water discharge valve; 207b, second water discharge valve. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] Example 1

[0040] Reference Figure 1 , which is the first embodiment of the present invention, provides a condenser vacuuming and automatic water draining system, including an air extraction module 100 for vacuuming the condenser, and a water storage module 200 for draining the condenser.

[0041] Specifically, the exhaust module 100 is used to extract uncondensed gas in the high-pressure condenser or the low-pressure condenser, and includes an exhaust unit 101 and an exhaust pipe 102 for connecting the exhaust unit 101 and the condenser; wherein the exhaust pipe 102 includes a first exhaust pipe 102a for connecting the exhaust unit 101 and the high-pressure condenser, and a second exhaust pipe 102b for connecting the exhaust unit 101 and the low-pressure condenser.

[0042] Furthermore, the water storage module 200 is used to store liquid discharged from the high-pressure condenser or the low-pressure condenser, and includes a water tank 201 and a drain pipe 202, wherein the water tank 201 is used to store water, the drain pipe 202 is a flow channel for discharging liquid from the high-pressure condenser or the low-pressure condenser, and the water tank 201 has a closed water storage chamber 201a inside, and the water tank 201 is provided with a water inlet, an exhaust port and a drain port intersecting the water storage chamber 201a, one end of the drain pipe 202 is connected to the water inlet of the water tank 201, and the other end of the drain pipe 202 is connected to and communicates with the exhaust pipe 102.

[0043] Specifically, the water discharge pipe 202 includes a first water discharge pipe 202a connected to and in communication with the first air extraction pipe 102a, and a second water discharge pipe 202b connected to and in communication with the second air extraction pipe 102b.

[0044] As a further improvement, a drain valve 207 is installed on the drain pipe 202 to control the on-off of the drain pipe 202 and the flow rate and flow of the liquid in the drain pipe 202. The drain valve 207 includes a first drain valve 207a arranged on the first drain pipe 202a, and a second drain valve 207b arranged on the second drain pipe 202b.

[0045] As a further improvement, the exhaust port of the water storage tank 201 is connected to an exhaust pipe 203, and an exhaust valve 204 is installed on the exhaust pipe 203; when in use, the exhaust valve 204 is controlled to open or close to adjust the internal air pressure of the water storage tank 201, so that the liquid can flow out or flow into the water storage chamber 201a normally.

[0046] As a further improvement, a drainage pipe 205 is connected to the drainage outlet of the water tank 201, and a drainage valve 206 is installed on the drainage pipe 205; the drainage valve 206 is normally closed. When the liquid in the water storage chamber 201a is full, the drainage valve 206 is opened to discharge the liquid in the water storage chamber 201a.

[0047] As a further improvement, a liquid level measuring mechanism is provided in the water storage chamber 201a for measuring the liquid level in the water storage chamber 201a. The liquid level measuring mechanism is any one of a magnetic flap liquid level gauge, an ultrasonic liquid level gauge, a static pressure liquid level gauge, or other liquid level gauges / liquid level transmitters / water level sensors capable of measuring liquid levels.

[0048] Example 2

[0049] Reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the system also includes a control module, which can control the operation of the drain valve 207, the exhaust valve 204, and the drain valve 206 according to the internal liquid level height of the water storage chamber 201a collected by the liquid level measuring mechanism.

[0050] Specifically, the method for the control module to control the actions of the drain valve 207, the exhaust valve 204 and the drain valve 206 includes:

[0051] Standard water level detection values, standard water valve opening time, standard undrained time, and standard water level fluctuation per unit time are preset.

[0052] When the water level detection value of the water tank 201 is higher than the standard water level detection value, the water discharge procedure is automatically executed.

[0053] When the condenser has not been drained for longer than the standard time, the logic for automatically starting the drain program is set.

[0054] Furthermore, the steps of starting the water discharge procedure include: closing the first water discharge valve 207a in sequence, opening the exhaust valve 204, and opening the second water discharge valve 207b to discharge water.

[0055] When the water level detection value of the water storage tank 201 is low, the water discharge program will be automatically shut down.

[0056] When the opening time of the second drain valve 207b exceeds the standard water valve opening time, the drain closing procedure is automatically executed.

[0057] Furthermore, the steps of closing the drain program include: closing the second drain valve 207b and the exhaust valve 204 in sequence, and opening the first drain valve 207a.

[0058] As a further improvement, when the variation of the water level in the water storage tank 201 per unit time is less than the standard variation of the water level per unit time, an alarm is issued in the control module.

[0059] Specifically, the alarm situation includes obtaining the real-time water level detection value of the water tank 201 within a period of time, and performing difference calculation on the real-time water level detection value of the water tank 201 at different times; when the water level detection value of the water tank 201 changes in unit time less than the standard water level change in unit time, an alarm is issued in the control module, and the liquid level meter of the water tank 201 is checked.

[0060] The remaining structures are the same as those of Example 1.

[0061] Example 3

[0062] Reference Figure 1 , which is the third embodiment of the present invention. This embodiment is different from the first embodiment in that: the system also includes a control module, which can control the operation of the drain valve 207, the exhaust valve 204, and the drain valve 206 according to the internal liquid level height of the water storage chamber 201a collected by the liquid level measuring mechanism.

[0063] Specifically, the method for the control module to protect the operation of the drain valve 207, the exhaust valve 204 and the drain valve 206 includes:

[0064] When either the first drain valve 207a or the second drain valve 207b is opened, the opening instructions of the exhaust valve 204 and the drain valve 206 of the water storage tank 201 are blocked, and the exhaust valve 204 and the drain valve 206 cannot be opened.

[0065] When any one of the exhaust valve 204 and the drain valve 206 of the water storage tank 201 is opened, the opening instructions of the first drain valve 207a and the second drain valve 207b are blocked, and the first drain valve 207a and the second drain valve 207b cannot be opened.

[0066] The remaining structures are the same as those of Example 1.

[0067] Example 4

[0068] As the fourth embodiment of the present invention, a control method for a condenser vacuum automatic draining system is provided, which is applied to the control modules described in Embodiments 2 and 3, and specifically includes the following steps: obtaining the system's past operation log, obtaining the past power generation of the vacuum unit, the past water level value of the water tank, and the past status of each valve.

[0069] Furthermore, according to the past power generation of the pumping unit in different time periods, the past water level values ​​of the water tank and the past status of the valve, several past water discharge system status reference sets are constructed.

[0070] Furthermore, the past state of the valve in each past water discharge system state reference set is marked as a past valve drive reference strategy, and a first valve drive reference strategy generation model is constructed based on a number of past water discharge system state reference sets.

[0071] Furthermore, the current power generation of the pumping unit and the current water level of the water tank are obtained, and the first valve drive reference strategy generation model is used to analyze the current power generation and the current water level of the water tank to obtain the corresponding first valve drive reference strategy.

[0072] Furthermore, a first evaluation is performed on the first valve driving reference strategy according to single opening and closing time standards preset for different valves.

[0073] According to the preset opening and closing frequency standards of different valves, the first valve driving reference strategy is evaluated for the second time.

[0074] Further, based on the first evaluation and the second evaluation of the first valve driving reference strategy, a first preferred value of the first valve driving reference strategy is obtained.

[0075] Furthermore, according to the first evaluation and the second evaluation of the first valve driving reference strategy, the driving characteristics of different valves are adjusted, and a plurality of second valve driving reference strategies are generated.

[0076] Furthermore, a first evaluation and a second evaluation are performed on a plurality of second valve driving reference strategies respectively to obtain second preferred values ​​of the plurality of second valve driving reference strategies, and based on the magnitude of the second preferred values, the plurality of second valve driving strategies are sorted in application order to generate a preferred sequence.

[0077] Further, the optimal second valve driving strategy replaces the corresponding first valve driving strategy in the first valve driving reference strategy generation model, and the first valve driving reference strategy generation model at this time is recorded as the updated valve driving reference strategy generation model.

[0078] As a further improvement, the method for constructing the first valve drive reference strategy generation model includes: establishing a first time axis for past water tank water level values ​​and past valve states in different time periods, and marking the water tank water level values, valve states, and the duration and number of starts of this state in different time periods on the first time axis to generate a number of water tank water level value marking points and valve state marking points.

[0079] Furthermore, a first time reference line is established for the past power generation, and a past power generation curve is generated with the first time reference line as the horizontal coordinate.

[0080] Furthermore, the power generation curve of the past power generation curve is aligned with the first time axis, and an association relationship is established between different curve segments on the past power generation curve and different water tank water level value mark points and valve status mark points on the first time axis.

[0081] Specifically, the formula for calculating the optimal value of the valve drive reference strategy is:

[0082]

[0083] Where A is the optimal value of the valve drive reference strategy, a1 is the conversion coefficient of the first optimal value, a2 is the conversion coefficient of the second optimal value, t i is the reference single opening and closing time, t0 is the standard single opening and closing time, f i is the reference opening and closing frequency, and f0 is the difference configuration of the standard opening and closing frequency.

[0084] Furthermore, when the updated valve drive reference strategy generation model outputs a second valve drive strategy, the water level of the water tank is monitored. If the water level of the water tank is higher than the warning value, the second valve drive strategy with the next position in the preferred sequence replaces the original second valve drive strategy.

[0085] Furthermore, the specific content of the valve driving strategy includes determining the influence relationship between several valves and determining the opening and closing order, determining the time nodes for opening and closing of several valves, and recording the single opening and closing time, and driving according to the time nodes for opening and closing of the valves.

[0086] The remaining structure is the same as that of Example 2.

[0087] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0088] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0089] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A condenser vacuum automatic water discharge system, characterized in that: include, An air extraction module (100) comprising an air extraction unit (101) and an air extraction pipeline (102) for connecting the air extraction unit (101) and a condenser; and A water storage module (200) comprises a water storage tank (201) and a water discharge pipe (202); the water storage tank (201) has a closed water storage chamber (201a) inside; the water storage tank (201) is provided with a water inlet, an air outlet and a water outlet intersecting the water storage chamber (201a); one end of the water discharge pipe (202) is connected to the water inlet of the water storage tank (201); and the other end of the water discharge pipe (202) is connected to and communicates with an air extraction pipe (102).

2. The condenser vacuum automatic water discharge system according to claim 1, characterized in that: A drain valve (207) is installed on the drain pipe (202).

3. The condenser vacuum automatic water discharge system according to claim 2, characterized in that: An exhaust pipe (203) is connected to the exhaust port of the water storage tank (201), and an exhaust valve (204) is installed on the exhaust pipe (203); The water outlet of the water storage tank (201) is connected to a drainage pipe (205), and a drainage valve (206) is installed on the drainage pipe (205).

4. The condenser vacuum automatic water discharge system according to claim 3, characterized in that: A liquid level measuring mechanism is provided in the water storage chamber (201a) for measuring the liquid level height in the water storage chamber (201a).

5. The condenser vacuum automatic water discharge system according to claim 4, characterized in that: It also includes a control module, which can control the operation of the drain valve (207), the exhaust valve (204), and the drain valve (206) according to the internal liquid level height of the water storage chamber (201a) collected by the liquid level measurement mechanism.

6. A control method for a condenser vacuum automatic water discharge system, applied to the control module as claimed in claim 5, characterized in that: The specific steps include: Obtain the system's past operation logs to obtain the past power generation of the air extraction unit, the past water level of the water tank, and the past status of each valve; According to the past power generation of the pumping unit in different time periods, the past water level value of the water tank and the past status of the valve, several past water discharge system status reference sets are constructed; Marking the past state of the valve in each past water discharge system state reference set as the past valve drive reference strategy, and constructing a first valve drive reference strategy generation model based on a number of past water discharge system state reference sets; The current power generation of the pumping unit and the current water level of the water tank are obtained, and the current power generation and the current water level of the water tank are analyzed by the first valve driving reference strategy generation model to obtain the corresponding first valve driving reference strategy; Performing a first evaluation on the first valve driving reference strategy according to the single opening and closing time standards preset for different valves; According to the preset opening and closing frequency standards of different valves, the first valve driving reference strategy is evaluated for the second time; Based on the first evaluation and the second evaluation of the first valve driving reference strategy, obtaining a first preferred value of the first valve driving reference strategy; According to the first evaluation and the second evaluation of the first valve driving reference strategy, the driving characteristics of different valves are adjusted, and a plurality of second valve driving reference strategies are generated; Performing a first evaluation and a second evaluation on a plurality of second valve driving reference strategies respectively to obtain second preferred values ​​of the plurality of second valve driving reference strategies, and sorting the plurality of second valve driving strategies in application order based on the magnitude of the second preferred values ​​to generate a preferred sequence; The optimal second valve driving strategy replaces the corresponding first valve driving strategy in the first valve driving reference strategy generation model, and the first valve driving reference strategy generation model at this time is recorded as the updated valve driving reference strategy generation model.

7. The control method according to claim 6, characterized in that: The method for constructing a first valve driving reference strategy generation model includes: Establishing a first time axis for past water tank water level values ​​and past valve states in different time periods, and marking the water tank water level values, valve states, and the duration and start times of the states in different time periods on the first time axis, and generating a number of water tank water level value marking points and valve state marking points; Establishing a first time reference line for past power generation, and generating a past power generation curve with the first time reference line as the horizontal coordinate; The power generation curve of the past power generation curve is aligned with the first time axis, and an association relationship is established between different curve segments on the past power generation curve and different water tank water level value mark points and valve status mark points on the first time axis.

8. The control method according to claim 7, characterized in that: The formula for calculating the optimal value of the valve drive reference strategy is: Where A is the optimal value of the valve drive reference strategy, a1 is the conversion coefficient of the first optimal value, a2 is the conversion coefficient of the second optimal value, t i is the reference single opening and closing time, t0 is the standard single opening and closing time, f i is the reference opening and closing frequency, and f0 is the difference configuration of the standard opening and closing frequency.

9. The control method according to claim 8, characterized in that: When the updated valve drive reference strategy generation model outputs the second valve drive strategy, the water level value of the water tank is monitored. If the water level value of the water tank is higher than the warning value, the second valve drive strategy with the next position in the preferred sequence will replace the original second valve drive strategy.

10. The control method according to claim 9, characterized in that: The specific contents of the valve driving strategy include determining the influence relationship of several valves and determining the opening and closing order, determining the time nodes for opening and closing of several valves, and recording the single opening and closing time, and driving according to the time nodes for opening and closing of the valves.

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