A control method and system for suppressing water hammer by superimposing a hydropower unit and energy storage

Abstract

This invention discloses a control method and system for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage, relating to the field of hydropower unit control technology. The method includes: during the normal grid-connected operation of the hydropower unit, real-time acquisition of the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit; calculating the output or absorption power of the hydropower unit and the combined energy storage device based on the power output value, guide vane opening value, and power fluctuation value; suppressing the reverse regulation phenomenon of the hydropower unit through the energy storage device, creating a power characteristic curve, and adjusting the power output or absorption of the energy storage device. This invention provides a control method and system for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage, significantly improving the regulation quality of the unit by suppressing the reverse regulation phenomenon of the hydropower unit. Suppressing the reverse regulation phenomenon helps ensure the normal operation of the primary frequency regulation function, thereby better maintaining the stability of the grid frequency.

Description

Technical Field

[0001] This invention relates to the field of hydropower unit control technology, specifically to a control method and system for suppressing water hammer and back-regulation by superimposing hydropower units and energy storage. Background Technology

[0002] With the construction of large-scale hydropower units, their proportion in the power grid is constantly increasing. The impact of hydropower units on the frequency stability of the power system is also becoming increasingly apparent. The quality of regulation and the reliability of operation of hydropower units directly affect the safe and reliable operation of the hydro-generator units and even the power system, as well as the power quality. Currently, during rapid regulation of hydropower units, the water hammer effect causing adverse regulation is the most significant factor affecting regulation quality. The water hammer effect mainly refers to the situation where, under steady-state conditions, when the unit's speed control system makes rapid adjustments, at the moment the guide vanes open (or close), due to the inertia of the water flow, the flow rate does not have time to immediately increase (or decrease), but the water pressure drops (or rises) instantaneously, causing the turbine output to drop (or rise) momentarily. Only when the flow rate gradually increases (or decreases) does the unit output begin to rise (or fall).

[0003] Currently, when large hydropower units adjust their power rapidly, in order to suppress the power reversal caused by the rapid movement of the guide vanes, the speed of the guide vanes is generally reduced by adjusting the control parameters. Some also suppress the rapid movement of the guide vanes by adding a speed limiting element. Although these methods can suppress the generation of water hammer to a certain extent, the excessively slow guide vane speed also affects the rapid response of the hydropower unit to the power grid when the frequency fluctuates, thus having certain limitations.

[0004] Therefore, it is also very necessary to use energy storage devices to quickly adjust the power of the energy storage devices to absorb or release power during the reverse regulation of the generator units, thereby suppressing the reverse regulation of the generator units. This is of great significance to the safety and stability of the power grid. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by this invention is that currently, most hydropower units suppress reverse regulation by limiting the speed of the guide vanes. However, due to the inherent characteristics of hydropower units, limiting the guide vane speed in some units causes the unit's power regulation response to be too slow, which is detrimental to the safe and stable operation of the power grid. This invention overcomes the shortcomings of the existing technology.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a control method for suppressing water hammer and back-regulation by superimposing hydropower units and energy storage, comprising:

[0008] During the normal operation of the hydropower unit connected to the grid, the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit are collected in real time.

[0009] Based on the power output value of the hydropower unit, the guide vane opening value of the hydropower unit, and the power fluctuation value, calculate the output or absorbed power of the hydropower unit and the combined energy storage device.

[0010] By using energy storage devices to suppress the reverse regulation phenomenon of hydropower units, a power characteristic curve is created, and the power output or absorption of the energy storage devices is adjusted to ensure that the reverse regulation phenomenon of hydropower units is effectively suppressed.

[0011] As a preferred embodiment of the control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in this invention, the calculation of the output or absorbed power of the hydropower unit and the combined energy storage device includes, during the normal operation of the unit connected to the grid, if the guide vane opening of the hydropower unit... If the load remains constant, it is determined that the unit has not adjusted the load. The total output power of the first hydropower unit and the energy storage device is calculated according to the first prediction model.

[0012] The first prediction model is expressed as follows:

[0013] ,

[0014] in, This represents the total output power of the first hydroelectric generator unit and the energy storage device combined. This represents the actual power output of the hydroelectric generator unit.

[0015] As a preferred embodiment of the control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in this invention, when the unit experiences load adjustment, if the guide vane opening value of the hydropower unit... The energy storage device operates in output power mode, and the total output power value of the second hydropower unit and the energy storage device is calculated according to the second prediction model.

[0016] The second prediction model is expressed as follows:

[0017] ,

[0018] in, This represents the total output power of the second hydroelectric generator unit combined with the energy storage device. This represents the actual output power of the energy storage device.

[0019] As a preferred embodiment of the control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in this invention, wherein the guide vane opening value of the hydropower unit is... At that time, the energy storage device operates in power absorption mode, and the total output power value of the third hydropower unit and the energy storage device is calculated according to the third prediction model.

[0020] ,

[0021] in, This represents the total output power of the third hydroelectric generator unit and the energy storage device.

[0022] As a preferred embodiment of the control method for suppressing water hammer back-regulation by superimposing hydro-generator units and energy storage as described in this invention, in the process of the unit adjusting the load, the back-regulation phenomenon caused by the inherent characteristics of the turbine is suppressed by outputting or absorbing power through the energy storage device. The output characteristics are defined, including the back-regulation peak coefficient, the back-regulation control start time coefficient, the back-regulation peak control value time coefficient, and the back-regulation control end time coefficient.

[0023] Power characteristic curves are created by combining output characteristics with anti-modulation characteristics to suppress anti-modulation.

[0024] As a preferred embodiment of the control method for suppressing water hammer and back-modulation by superimposing hydropower units and energy storage as described in this invention, the output characteristic is expressed as follows:

[0025] ,

[0026] in, This refers to the real-time power value actually absorbed or emitted by the energy storage device. To counter-adjust peak coefficient, The inverse control start time coefficient is used. The time coefficient for the anti-peak control value. Tw is the time coefficient for the end of the counter-adjustment control, i is the time constant of the turbine water flow inertia, and i represents the time.

[0027] As a preferred embodiment of the control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage according to the present invention, the suppression of reverse regulation includes that when the unit starts to adjust to the reverse regulation control start time, the energy storage device outputs and absorbs 0 power.

[0028] When the control time is within the time between the start time of the reverse regulation control and the time of the reverse peak regulation control, the energy storage device outputs absorbed power of: The time-varying pattern at point O;

[0029] When the control time is within the time of the anti-peak control value and the end time of the anti-peak control, the energy storage device outputs absorbed power from point 0 to... The points change regularly over time;

[0030] When the control time is longer than the end time of the reverse regulation control, the energy storage device outputs zero power, thus completing the reverse regulation suppression of a disturbance process.

[0031] Another objective of this invention is to provide a control system for suppressing water hammer back-regulation by superimposing a hydro-generator unit and energy storage. This system solves the problem of power back-regulation caused by water flow inertia when the guide vanes of the hydro-generator unit's speed governor operate rapidly. To address this problem, a method is proposed to increase energy storage and control its output power output characteristics to suppress back-regulation of the overall output characteristics of the unit.

[0032] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a control system for suppressing water hammer and back-regulation by superimposing a hydropower unit and energy storage, comprising: a data acquisition module, used to collect in real time the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit during normal grid-connected operation; a power calculation module, used to calculate the total combined output power value of the hydropower unit and the energy storage device based on the power output value of the hydropower unit, the power output value of the energy storage device, and the guide vane opening value of the hydropower unit; and a back-regulation suppression module, used to suppress the back-regulation phenomenon of the hydropower unit through the energy storage device, create a power characteristic curve, adjust the power output or absorption of the energy storage device, and ensure that the power back-regulation phenomenon of the hydropower unit is effectively suppressed.

[0033] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the control method for suppressing water hammer and back-regulation by superimposing a hydro-generator unit and energy storage as described above.

[0034] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a control method for suppressing water hammer and back-regulation by superimposing a hydro-generator unit and energy storage as described above.

[0035] The beneficial effects of this invention are as follows: The control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage provided by this invention significantly improves the regulation quality of the units by suppressing the reverse regulation phenomenon of the hydropower units. Suppressing the reverse regulation phenomenon helps ensure the normal operation of the primary frequency regulation function, thereby better maintaining the stability of the power grid frequency. Frequent power reverse regulation will cause additional mechanical stress to the hydropower units, increase equipment wear, and thus increase maintenance costs. Through effective suppression measures, this wear can be reduced, equipment life can be extended, and maintenance costs can be reduced. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 The above is an overall flowchart of a control method for suppressing water hammer and back-regulation by superimposing a hydro-generator unit and energy storage, which is provided as an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram illustrating the suppression of water hammer in a control method for suppressing water hammer and back-modulation by superimposing a hydropower unit and energy storage, as provided in an embodiment of the present invention.

[0039] Figure 3 The simulation waveform diagram of the unit power back-regulation of a control method for suppressing water hammer back-regulation by superimposing hydro-generator unit and energy storage according to an embodiment of the present invention is shown.

[0040] Figure 4 The simulation waveform diagram of the power output suppression of the energy storage device in a control method for suppressing water hammer and back-modulation by superimposing a hydro-generator unit and energy storage according to an embodiment of the present invention is shown.

[0041] Figure 5 The simulation waveform diagram shows the power output of the combined hydropower unit and energy storage device after suppressing water hammer and back-regulation, which is a control method for suppressing water hammer and back-regulation provided in an embodiment of the present invention. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0044] Example 1, referring to Figure 1 As one embodiment of the present invention, a control method for suppressing water hammer and back-regulation by superimposing a hydropower unit and energy storage is provided, comprising:

[0045] Step S1: During the normal operation of the hydropower unit connected to the grid, collect the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit in real time.

[0046] Step S2: Calculate the output or absorbed power of the hydropower unit and the combined energy storage device based on the power output value, guide vane opening value, and power fluctuation value of the hydropower unit.

[0047] Step S3: Suppress the reverse regulation phenomenon of the hydropower unit through the energy storage device, create a power characteristic curve, adjust the power output or absorption of the energy storage device, and ensure that the reverse regulation phenomenon of the hydropower unit is effectively suppressed.

[0048] The calculation of the output or absorbed power of the hydropower unit and combined energy storage device includes the following: during normal grid-connected operation of the unit, if the guide vane opening of the hydropower unit is... If the load remains constant, it is determined that the unit has not adjusted the load. The total output power of the first hydropower unit and the energy storage device is calculated according to the first prediction model.

[0049] The first prediction model is expressed as follows:

[0050] ,

[0051] in, This represents the total output power of the first hydroelectric generator unit and the energy storage device combined. This represents the actual power output of the hydroelectric generator unit.

[0052] When the unit experiences load adjustment, if the guide vane opening value of the hydropower unit... The energy storage device operates in output power mode, and the total output power value of the second hydropower unit and the energy storage device is calculated according to the second prediction model.

[0053] The second prediction model is expressed as follows:

[0054] ,

[0055] in, This represents the total output power of the second hydroelectric generator unit combined with the energy storage device. This represents the actual power output of the hydroelectric generator unit. This represents the actual output power of the energy storage device.

[0056] If the guide vane opening value of the hydroelectric generator At that time, the energy storage device operates in power absorption mode, and the total output power value of the third hydropower unit and the energy storage device is calculated according to the third prediction model.

[0057] ,

[0058] in, This represents the total output power of the third hydroelectric generator unit combined with the energy storage device. This represents the actual power output of the hydroelectric generator unit. This represents the actual power absorbed by the energy storage device.

[0059] During the load adjustment process of the unit, the reverse regulation phenomenon caused by the inherent characteristics of the turbine is suppressed by outputting or absorbing power through the energy storage device. The output characteristics are defined, including the reverse regulation peak coefficient, the reverse regulation control start time coefficient, the reverse regulation peak control value time coefficient, and the reverse regulation control end time coefficient. The power characteristic curve is created by combining the output characteristics with the reverse regulation characteristics to suppress the reverse regulation.

[0060] The output characteristics are expressed as follows:

[0061] ,

[0062] in, This refers to the real-time power value actually absorbed or emitted by the energy storage device. To counter-adjust peak coefficient, The inverse control start time coefficient is used. The time coefficient for the anti-peak control value. Tw is the time constant of the turbine's water flow inertia, which is an inherent parameter of the turbine. i represents time, which is time i.

[0063] It should be noted that, ta, tb, and tc are four setting parameters. These setting values ​​are determined based on the characteristics of the unit itself or through disturbance tests. The parameters themselves are not special and are mainly adjusted according to the actual situation.

[0064] Suppressing reverse regulation includes the time coefficient when the unit begins to adjust to the reverse regulation peak control value. At the corresponding reverse control start time, the energy storage device outputs and absorbs zero power.

[0065] When the control time is within the anti-peak control value time coefficient The corresponding reverse modulation control start time and reverse modulation peak control value time coefficient Within the corresponding peak-shaving control time, the energy storage device outputs absorbed power as follows: The time-varying pattern at point O;

[0066] When the control time is within the anti-peak control value time coefficient The corresponding peak-shaving control value time and peak-shaving control end time coefficient Within the corresponding reverse regulation control end time, the energy storage device output absorbed power is from point 0 to... The points change regularly over time;

[0067] When the control time is greater than the reverse control end time coefficient At the corresponding end time of the reverse regulation control, the energy storage device outputs zero power, completing the reverse regulation suppression of a disturbance process.

[0068] Example 2, refer to Figure 2 As one embodiment of the present invention, a control system for suppressing water hammer and back-regulation by superimposing a hydropower unit and energy storage is provided, comprising:

[0069] The data acquisition module is used to collect the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit in real time during the normal operation of the hydropower unit connected to the grid.

[0070] The power calculation module is used to calculate the combined total output power of the hydropower unit and the energy storage device based on the power output value of the hydropower unit, the power output value of the energy storage device, and the guide vane opening value of the hydropower unit.

[0071] The reverse regulation suppression module is used to suppress the reverse regulation phenomenon of hydropower units through energy storage devices, create power characteristic curves, adjust the power output or absorption of energy storage devices, and ensure that the reverse regulation phenomenon of hydropower units is effectively suppressed.

[0072] During normal grid connection and operation of the generating unit, For the current hydropower units Real-time active power value For energy storage devices currently The actual output or absorbed power value at any given time. For the current hydropower units Guide vane opening value at any time The inherent inertial time constant of the hydroelectric generator is the water flow. To counter-adjust peak coefficient, The inverse control start time coefficient is used. The time coefficient for the anti-peak control value. The coefficient for the end time of the reverse control. For hydropower units and energy storage devices currently The total actual power value is output in conjunction with the output at all times.

[0073] During normal grid-connected operation of the generating unit, when there is no load adjustment, i.e., the guide vane opening of the hydroelectric generating unit... When constant:

[0074] ,

[0075] in, This represents the total output power of the combined hydropower unit and energy storage device. This represents the actual power output of the hydroelectric generator unit.

[0076] When the unit is running in grid connection, and a load adjustment occurs, the guide vane opening value of the hydropower unit... When this occurs, the energy storage device operates in output power mode, with a combined total output power value of:

[0077] ,

[0078] in, This represents the total output power of the combined hydropower unit and energy storage device. This represents the actual power output of the hydroelectric generator unit. This represents the actual output power of the energy storage device.

[0079] When the unit is running in grid connection, and a load adjustment occurs, the guide vane opening value of the hydropower unit... When this occurs, the energy storage device operates in power absorption mode, and the total combined output power is:

[0080] ,

[0081] in, This represents the total output power of the combined hydropower unit and energy storage device. This represents the actual power output of the hydroelectric generator unit. This represents the actual power absorbed by the energy storage device.

[0082] During load regulation by the generating unit, the reverse regulation phenomenon caused by the inherent characteristics of the turbine is suppressed by the output or absorption of power through energy storage devices. The output characteristics are defined as follows: To counter-adjust peak coefficient, The inverse control start time coefficient is used. The time coefficient for the anti-peak control value. This is the time coefficient for the end of the anti-modulation control. A power characteristic curve is created by combining the above parameters with the anti-modulation characteristics to suppress anti-modulation.

[0083] Its output characteristics are as follows:

[0084] (1)

[0085] in, This refers to the real-time power value actually absorbed or emitted by the energy storage device. To counter-adjust peak coefficient, The inverse control start time coefficient is used. The time coefficient for the anti-peak control value. This is the coefficient for the end time of the counter-adjustment control.

[0086] By increasing the energy storage for rapid reverse regulation, the reverse regulation characteristic of the hydropower unit is suppressed. During the unit's load regulation process, the reverse regulation phenomenon is suppressed by the rapid output or absorption of power by the energy storage device. According to formula (1), the time coefficient from the start of unit regulation to the start of reverse regulation control is calculated. At the corresponding inverse control start time, the energy storage device outputs and absorbs zero power; when the control time is within the inverse control start time coefficient... The corresponding reverse modulation control start time and reverse modulation peak control value time coefficient When the corresponding anti-peak control value is within the time frame, such as Figure 2 As shown, the energy storage device outputs absorbed power of The time coefficient changes regularly with time up to point O; when the control time is within the anti-peak control value time coefficient The corresponding peak-shaving control value time and peak-shaving control end time coefficient Within the corresponding reverse modulation control end time, such as Figure 2 As shown, the energy storage device outputs absorbed power from 0 to... The point changes according to a time pattern; when the control time is greater than the reverse control end time coefficient... At the corresponding end time of the reverse regulation control, the energy storage device outputs and absorbs 0 power, completing the reverse regulation suppression of a disturbance process. The horizontal axis t represents time, and the vertical axis P represents power.

[0087] Example 3, an embodiment of the present invention, differs from the previous two embodiments in that:

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-including system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0090] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0091] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0092] Example 4, refer to Figures 3-5 As an embodiment of the present invention, a control method for suppressing water hammer and back-regulation by superimposing hydro-generator units and energy storage is provided. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0093] A simulation example was used to verify the reverse regulation of the unit power. The unit was operating normally at 1 (per unit power). At a time point of 5 seconds, a frequency disturbance was performed, with the disturbance amount being about 10%. Figure 3 The waveform diagram shows the power output characteristics of the generator unit itself. Figure 4This is a waveform diagram showing the power output characteristics of an energy storage device in order to suppress reverse modulation. Figure 5 The waveform diagram shows the power output characteristics of the entire unit's combined energy storage equipment after suppressing reverse regulation. Figure 5 It can be seen that with the addition of energy storage, the unit can effectively suppress the phenomenon of reverse regulation during frequency regulation.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A control method for suppressing water hammer and reverse regulation by superimposing a hydropower unit and energy storage, characterized in that, Including: During the normal operation of the hydropower unit connected to the grid, the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit are collected in real time; According to the power output value of the hydropower unit, the guide vane opening value of the hydropower unit, and the power fluctuation value, calculate the output or absorption power of the hydropower unit and the combined energy storage device; Suppress the reverse regulation phenomenon of the hydropower unit through the energy storage device, create a power characteristic curve, and adjust the power output or absorption of the energy storage device to ensure that the reverse regulation phenomenon of the hydropower unit power is effectively suppressed; The calculation of the output or absorption power of the hydropower unit and the combined energy storage device includes that during the normal operation of the unit connected to the grid, if the guide vane opening Y(i) of the hydropower unit remains constant, it is judged that the unit has not adjusted the load, and the first total combined output power value of the hydropower unit and the energy storage device is calculated according to the first prediction model; When the unit has a load adjustment, if the guide vane opening value Y(i) of the hydropower unit < Y(i+1), the energy storage device operates in the power output mode, and the second total combined output power value of the hydropower unit and the energy storage device is calculated according to the second prediction model; If the guide vane opening value Y(i) of the hydropower unit > Y(i+1), the energy storage device operates in the power absorption mode, and the third total combined output power value of the hydropower unit and the energy storage device is calculated according to the third prediction model; During the process of the unit adjusting the load, suppress the reverse regulation phenomenon formed by the inherent characteristics of the water turbine through the power output or absorption of the energy storage device, and define the output characteristics, which include the reverse regulation peak coefficient, the reverse regulation control start time coefficient, the reverse regulation peak control value time coefficient, and the reverse regulation control end time coefficient; Suppress the reverse regulation by creating a power characteristic curve combining the output characteristics and the reverse regulation characteristics; The output characteristics are expressed as Among them, P c (i) represents the real-time power value actually absorbed or generated by the energy storage device, h is the peak regulation coefficient, and t a For the inverse control start time coefficient, t b t is the time coefficient for the anti-peak control value. c Tw is the time coefficient for the end of the counter-adjustment control, i is the time constant of the turbine water flow inertia, and i represents the time.

2. The control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in claim 1, characterized in that: The first prediction model is expressed as P1 sum (i)=P(i) Among them, P1 sum (i) represents the total output power of the first hydropower unit and the energy storage device, and P(i) represents the actual power of the hydropower unit.

3. The control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in claim 2, characterized in that: The second prediction model is expressed as P2 sum (i)=P(i)+P c (i) Among them, P2 sum (i) represents the total output power of the second hydroelectric generator unit and the energy storage device, P. c (i) represents the actual output power of the energy storage device.

4. The control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in claim 3, characterized in that: The third prediction model is expressed as P3 sum (i)=P(i)-P c (i) Among them, P3 sum (i) represents the total output power of the third hydroelectric generator unit and the energy storage device.

5. The control method for suppressing water hammer and reverse regulation by superimposing hydropower units and energy storage as described in claim 4, characterized in that: The suppression of the reverse regulation includes that when the unit starts to adjust to the reverse regulation control start time, the output absorption power of the energy storage device is 0; When the control time is within the time between the start time of the reverse regulation control and the time of the reverse peak regulation control, the energy storage device outputs and absorbs power t. a The time-varying pattern at point O; When the control time is within the time of the anti-peak control value and the end time of the anti-peak control, the energy storage device outputs absorbed power from point O to t. c The points change regularly over time; When the control time is greater than the reverse regulation control end time, the output absorption power of the energy storage device is 0, and the reverse regulation suppression of the power of a disturbance process is completed.

6. A system employing a control method for suppressing water hammer and reverse regulation by superimposing a hydropower unit and energy storage as described in any one of claims 1 to 5, characterized in that, Including: A data acquisition module, which is used to collect in real time the power output value of the hydropower unit, the power output or absorption value of the energy storage device, and the guide vane opening value of the hydropower unit during the normal operation of the hydropower unit connected to the grid; A power calculation module, which is used to calculate the output or absorption power of the hydropower unit and the combined energy storage device according to the power output value of the hydropower unit, the guide vane opening value of the hydropower unit, and the power fluctuation value; A reverse regulation suppression module, which is used to suppress the reverse regulation phenomenon of the hydropower unit through the energy storage device, create a power characteristic curve, and adjust the power output or absorption of the energy storage device to ensure that the reverse regulation phenomenon of the hydropower unit power is effectively suppressed.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it realizes the steps of a control method for suppressing water hammer reverse regulation by superimposing a hydropower unit and an energy storage as described in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it realizes the steps of a control method for suppressing water hammer reverse regulation by superimposing a hydropower unit and an energy storage as described in any one of claims 1 to 5.

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