Hydroenergy utilization improvement rate measuring and calculating method and system based on natural incoming water power generation capacity

Abstract

The invention discloses a water energy utilization improvement rate measuring and calculating method and system based on natural incoming water power generation capacity, and relates to the technical field of hydropower station optimization scheduling, and the method comprises the steps: obtaining the natural incoming water amount of each hydropower station in a check period; on the basis of the natural incoming water quantity, calculating to obtain the required power generation quantity of the natural incoming water of each hydropower station; and taking the power generation amount as the examination power amount, substituting the examination power amount into a calculation formula of the water energy utilization improvement rate, and calculating the water energy utilization improvement rate of each hydropower station. According to the method, the actual performance of the hydropower station can be evaluated more truly, and the accuracy of the water energy utilization efficiency is improved truly and effectively.

Description

Technical Field

[0001] The present invention relates to the technical field of optimized dispatching of hydropower stations, and in particular to a method and system for calculating the water energy utilization improvement rate based on the power generation capacity of natural water. Background Art

[0002] As the global energy structure transitions toward a low-carbon economy, hydropower, thanks to its renewable nature and excellent peak-shaving capabilities, has become a core energy source. By 2024, my country's installed hydropower capacity had reached 420 million kilowatts, accounting for 24.1% of the country's total power generation.

[0003] However, traditional methods for calculating the improvement rate of hydropower utilization usually use a time scale of ten days or months. This rough time division makes it difficult to capture changes in parameters in the short term, and is not suitable for the joint scheduling needs between cascade reservoir groups, resulting in a large deviation between the calculation results and the actual situation.

[0004] Although there has been some progress in existing research, there are still deficiencies in the precision and accuracy of data confirmation, resulting in a lot of useless work. Summary of the Invention

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a method for calculating the water energy utilization improvement rate based on the natural water power generation capacity, which can more realistically evaluate the actual performance of the hydropower station, truly and effectively improve the accuracy of water energy utilization efficiency, lay a solid foundation for the optimization of power generation scheduling strategy, and effectively improve the overall operating efficiency and economic benefits of the hydropower station.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a method for calculating the water energy utilization improvement rate based on the natural water power generation capacity, which comprises obtaining the amount of natural water entering the reservoir of each hydropower station during the assessment period;

[0008] Calculate the amount of power generated by the natural water of each hydropower station based on the natural water amount;

[0009] The required power generation is substituted as the assessment power into the calculation formula of the water energy utilization improvement rate to calculate the water energy utilization improvement rate of each hydropower station.

[0010] As a preferred solution of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity of the present invention, wherein: based on the natural water volume, the required power generation capacity of the natural water of each hydropower station is calculated and obtained, specifically comprising the following steps:

[0011] According to whether each hydropower station has abandoned water during the assessment period, the power generation capacity of each hydropower station using natural water is obtained;

[0012] Obtaining the energy storage change value of each hydropower station within the same assessment period as the power generation capacity;

[0013] The power generation capacity of each hydropower station and the corresponding energy storage change value are added together to obtain the power generation capacity of each hydropower station.

[0014] As a preferred solution of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity of the present invention, the following steps are specifically included: according to whether each hydropower station has abandoned water during the assessment period, the power generation capacity of the natural water of each hydropower station is obtained respectively:

[0015] If each hydropower station does not abandon water during the assessment period, the power generation capacity is calculated based on the corresponding natural inflow water volume, head and power station output coefficient of each hydropower station during the assessment period;

[0016] When each hydropower station abandons water during the assessment period, the power generation capacity is calculated based on the corresponding power generation load rate and expected output on the day of abandonment during the assessment period.

[0017] As a preferred solution of the method for calculating the improvement rate of water energy utilization based on the power generation capacity of natural water of the present invention, the amount of natural water entering the reservoir of each hydropower station during the assessment period is obtained, specifically including:

[0018] When there is only one hydropower station and no upstream hydropower station, the natural water inflow is the actual inflow of water to the hydropower station.

[0019] As a preferred solution of the method for calculating the improvement rate of water energy utilization based on the power generation capacity of natural water of the present invention, the method further includes: obtaining the amount of natural water entering the reservoir of each hydropower station during the assessment period, and specifically further including:

[0020] When the hydropower station is a cascade hydropower station, the natural water inflow is the sum of the interval natural flow of any hydropower station and the interval natural flow of each upstream hydropower station.

[0021] As a preferred solution of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity of the present invention, wherein: based on the natural water volume, the required power generation capacity of the natural water of each hydropower station is calculated, specifically further comprising:

[0022] When the hydropower station is a cascade hydropower station, the required power generation of the cascade hydropower station is the sum of the required power generation of each station in the cascade.

[0023] As a preferred solution of the method for calculating the improvement rate of water energy utilization based on natural water power generation capacity of the present invention, the optimal duration of the assessment period is 24 hours.

[0024] To further solve the above technical problems, the present invention provides the following technical solutions: a system for calculating the water energy utilization improvement rate based on the natural water power generation capacity, including a data acquisition module responsible for obtaining the amount of natural water entering the reservoir of each hydropower station during the assessment period;

[0025] The power generation calculation module calculates the power generation required for each hydropower station based on the natural water inflow;

[0026] The water energy utilization improvement rate calculation module substitutes the expected power generation into the water energy utilization improvement rate calculation formula to calculate the water energy utilization improvement rate of each hydropower station;

[0027] The cascade hydropower station processing module is responsible for calculating the sum of the power generation required by each cascade station and the summary of the natural flow in the interval;

[0028] In addition, the assessment period duration optimization module adjusts the duration of the assessment period according to actual needs to achieve the optimal value of 24 hours.

[0029] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, it implements the steps of the above-mentioned method for calculating the water energy utilization improvement rate based on the natural water power generation capacity.

[0030] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the above-mentioned method for calculating the water energy utilization improvement rate based on the natural water power generation capacity are implemented.

[0031] The beneficial effects of the present invention are as follows: by taking the natural water power generation capacity as the basis for assessing the power quantity, the theoretical maximum power generation potential of the hydropower station during a specific assessment period can be more accurately reflected. At the same time, when calculating the assessment power quantity, the presence or absence of water abandonment is fully considered, which further establishes the data accuracy of using the natural water power generation capacity as the basis for calculating the assessment power quantity. In addition, compared with the traditional calculation method based on a time scale of ten days or months, the present invention uses a day as the calculation period, which can more finely capture the dynamic changes of natural water and reservoir energy storage, thereby providing a more accurate assessment of the power generation capacity to be generated. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] Figure 1 This is an overall flow chart of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity of the present invention;

[0034] Figure 2 Schematic diagram of the water head output limit line of the present invention. 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 embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. 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" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1

[0039] Reference Figure 1 , which is the first embodiment of the present invention, provides a method for calculating the water energy utilization improvement rate based on the natural water power generation capacity, which includes:

[0040] S1: Obtain the amount of natural water entering the reservoir of each hydropower station during the assessment period.

[0041] Furthermore, step S1 specifically includes the following steps:

[0042] S101: When there is only one hydropower station and there is no upstream hydropower station, the natural water inflow is the actual inflow of water to the hydropower station.

[0043] S102: When the hydropower station is a cascade hydropower station, the natural water inflow is the sum of the interval natural flow of any hydropower station and the interval natural flow of each upstream hydropower station.

[0044] It should be noted that the natural water power generation capacity refers to the amount of energy that a hydropower station can theoretically convert into electrical energy under given natural water conditions. It is an important indicator for measuring the power generation potential of a hydropower station, and mainly depends on factors such as the natural water volume, head, and the output coefficient of the power station. The natural water power generation capacity reflects the upper limit of the power generation capacity of a hydropower station under natural water conditions, and provides an important reference benchmark for evaluating the actual operating efficiency of the hydropower station. In actual calculations, using days as the calculation period can more accurately capture the dynamic changes of natural water, thereby more accurately evaluating the daily power generation potential of the hydropower station.

[0045] In this embodiment, the calculation expression of the natural flow rate of the interval in step S102 is:

[0046]

[0047] Among them, Q inb Indicates the natural water flow rate of the basin during the calculation period m 3 / s;Q ins,i represents the interval flow m of hydropower station i during the calculation period 3 / s; N represents the number of hydropower stations in the basin during the calculation period.

[0048] S2: Calculate the required power generation of the natural water of each hydropower station based on the natural water flow.

[0049] Furthermore, step S2 specifically includes the following steps:

[0050] S201: Obtain the power generation capacity of natural water from each hydropower station based on whether the hydropower station has abandoned water during the assessment period;

[0051] S202: Obtaining the energy storage change value of each hydropower station within the same assessment period as the power generation capacity;

[0052] S203: Adding the power generation capacity of each hydropower station and the corresponding energy storage change value to obtain the power generation capacity of each hydropower station.

[0053] Furthermore, step S201 specifically includes the following steps:

[0054] If each hydropower station does not abandon water during the assessment period, the power generation capacity is calculated based on the corresponding natural water inflow, head and power station output coefficient of each hydropower station during the assessment period;

[0055] When each hydropower station abandons water during the assessment period, the power generation capacity is calculated based on the corresponding power generation load rate and expected output on the day of abandonment during the assessment period.

[0056] Preferably, the calculation method reflects the actual amount of electricity that can be generated by the power station when the power station abandons water, deducting the amount of electricity affected by other reasons or calculating the amount of abandoned water as the amount of electricity that can be generated, which affects the accuracy of the amount of electricity that can be generated.

[0057] In step S201 of this embodiment, when each hydropower station does not abandon water during the assessment period, the calculation expression for the available power generation is:

[0058] E 可发 =KHW 入

[0059] Among them, K represents the power station output coefficient, which is the design value or the average value of the actual operation of the hydropower station in the past three years after review; H represents the calculated head, which is the daily average reservoir water level Z 上均 and the downstream average tailwater level Z 下均 The difference, H = Z 上均 -Z 下均 ;W 入 It represents the average daily inflow of water into the hydropower plant, and is calculated by reverse calculation based on the actual outflow of water according to the water balance of the reservoir (W 入 = natural water supply / 3600 / 100000000).

[0060] It should be noted that the unit of daily water inflow is 100 million cubic meters. In this embodiment, dividing by 100,000,000 converts it into cubic meters, and dividing by 3,600 converts seconds into hours. The result is 10,000 kWh.

[0061] It should be noted that if the head loss is large, the net head should be used to calculate the head loss; the daily average reservoir water level Z 上均 (Water level above the dam) is obtained by calculating the average reservoir water level every hour of the day, and the average tailwater level Z downstream is 下均 It is obtained by calculating the daily hourly tailwater level average value; when all units have been in operation for less than 1 year, the power station output coefficient K can be taken as the design value. When all units have been in operation for more than 1 year but less than 3 years, the power station output coefficient K can be determined after a comprehensive analysis of the design value and the actual operating value.

[0062] In step S201 of this embodiment, when each hydropower station abandons water during the assessment period, the calculation expression for the available power generation is:

[0063] E 可发 =γ×N 预 ×24

[0064] Where γ represents the power generation load rate on the day of water abandonment, which refers to the actual power generation load rate on the day of water abandonment of the hydropower station; N 预 Indicates the expected output, calculated by the head H on the head output limit line (chart) as shown Figure 2 Check and obtain the maximum output under the calculated head.

[0065] It should be noted that the power generation load rate γ on the day of water abandonment is obtained through statistical calculation of the power generation load rate during the water abandonment period in recent years. In order to simplify and reflect the actual situation on the day, the actual power generation load rate on the day of water abandonment of the hydropower station can be directly used.

[0066] Preferably, when the hydropower station is a cascade hydropower station, its corresponding power generation capacity (natural water power generation capacity) is the sum of the power generation capacity of the reservoir and the power generation capacity of each upstream reservoir, and its expression is:

[0067]

[0068] In step S202 of this embodiment, the calculation process of the energy storage change value is:

[0069] ES = available water volume * water head * power station output coefficient / 3600 / 100000000

[0070] ΔES=ES 时段末 -ES 时段初

[0071] It should be noted that the end of the period and the beginning of the period refer to the start and end times t of the assessment period respectively.

[0072] It should be noted that the available water volume = the storage capacity corresponding to the calculated water level - the dead storage capacity. This is because the water in the dead storage capacity is usually difficult to use for power generation, so it needs to be deducted when calculating energy storage.

[0073] It should be noted that head = (calculated water level + dead water level) / 2-tailwater level, where the tailwater level is the water level value in the tailwater level curve corresponding to 1 / 3 of the rated power generation flow of the power station (equal to the sum of the rated power generation flow of all units). This is because in actual operation, the tailwater level will be affected by factors such as the power generation flow. Determining the tailwater level in this way can more accurately reflect the head changes during the power generation process.

[0074] Preferably, energy storage is an important indicator to measure the energy reserve and regulation capacity of a hydropower plant. Accurate calculation of energy storage is of great significance for evaluating the operating status of a hydropower plant and optimizing its scheduling.

[0075] It should be noted that the calculation of hydropower station energy storage is based on factors such as the reservoir's water level, storage capacity, head, and power station output coefficient.

[0076] It should be noted that when the hydropower station is a cascade hydropower station, the calculation expression for the hydropower station energy storage is:

[0077]

[0078] Where n represents the number of cascade hydropower plants.

[0079] It should be noted that the available water volume = the available water volume of this reservoir + the available water volume of upstream reservoirs.

[0080] It should be noted that the energy storage of a cascade hydropower plant is equal to the sum of the energy storage of each cascade hydropower plant. In practical applications, accurate calculation of the energy storage of cascade hydropower plants can provide an important basis for the joint scheduling of cascade hydropower plants, and help achieve optimal allocation of water resources and stable supply of electricity.

[0081] S3: Substituting the required power generation as the assessment power into the calculation formula of the water energy utilization improvement rate to calculate the water energy utilization improvement rate of each hydropower station.

[0082] Preferably, the optimal length of the assessment period is 24 hours.

[0083] In this embodiment, the calculation process of step S3 is:

[0084] E 应发 =E 可发 +ΔES

[0085]

[0086] Among them, E 实际 Indicates the actual power generation of the hydropower plant during the assessment period; E 应发 It indicates the power generation that the hydropower plant should generate during the assessment period.

[0087] In summary, the present invention uses the natural water power generation capacity as the basis for assessing electricity quantity, which can more accurately reflect the theoretical maximum power generation potential of the hydropower station during a specific assessment period. At the same time, it fully considers the presence or absence of water abandonment when calculating the assessment electricity quantity, and further establishes the data accuracy of using the natural water power generation capacity as the basis for assessing electricity quantity. In addition, compared with the traditional calculation method with a time scale of ten days or months, the present invention uses a day as the calculation period, which can more finely capture the dynamic changes of natural water and reservoir energy storage, thereby providing a more accurate assessment of the expected power generation.

[0088] Example 2

[0089] The second embodiment of the present invention is different from the previous two embodiments in that it provides a method for calculating the improvement rate of water energy utilization based on natural water power generation capacity. In order to verify the beneficial effects of the present invention, the Wujiang cascade hydropower station is taken as an example to conduct scientific demonstration through economic benefit calculation and experiments.

[0090] The Wujiang cascade hydropower stations are located in the middle and upper reaches of the Wujiang mainstream in Guizhou Province. The nine hydropower stations managed and operated by the Wujiang Company include the Hongjiadu, Dongfeng, Suofengying, Wujiangdu, Goupitan, Silin, Shatuo, and the Dahuashui and Geliqiao hydropower stations on its tributaries, forming a cascade hydropower station cluster with a total installed capacity of 8.695 million kilowatts. Leveraging an advanced water regulation automation system, the company achieves precise hourly, daily, and monthly statistics and calculations of reservoir water levels, tailwater levels, inflows, heads, output coefficients, and other data for each hydropower station. Using a method for calculating the improvement in water energy utilization based on natural water inflow power generation capacity, it calculates daily indicators such as the water inflow power generation capacity and energy storage for each hydropower station and cascade, capturing changes in various parameters more precisely and accurately calculating the water inflow power generation capacity and required power generation, thereby improving the accuracy of the calculation of the water energy utilization improvement rate. Through its application in the Wujiang cascade, the feasibility and accuracy of this method for calculating the improvement in water energy utilization based on natural water inflow power generation capacity have been verified.

[0091] The method of the present invention can accurately calculate the required power generation of a hydropower plant, thereby providing a reliable basis for evaluating the water energy utilization efficiency of the hydropower plant, helping the hydropower plant to optimize power generation scheduling strategies and improve water energy utilization efficiency. Table 1-1 is a data comparison of the two calculation methods in 2024.

[0092] Table 1-1 Comparison of the Wujiang Cascade Power Generation Capacity Algorithm Based on Natural Water Inflow and the Traditional Algorithm in 2024

[0093]

[0094] By comparison, it can be found that the calculation method based on the natural water inflow power generation capacity has a higher water energy utilization improvement rate and can more accurately reflect the actual power generation capacity and water energy utilization of cascade hydropower plants. The traditional method uses a ten-day calculation period, and the statistics of various parameters are not accurate enough. It cannot fully consider the dynamic changes of natural water inflow and reservoir energy storage, resulting in a large deviation between the calculation results and the actual situation. The new method uses a daily calculation period, which can more accurately capture the changes in various parameters and accurately calculate the water inflow power generation capacity and the required power generation. This improves the calculation accuracy of the water energy utilization improvement rate and provides a more reliable basis for the optimized scheduling of cascade hydropower plants.

[0095] Example 3

[0096] The third embodiment of the present invention is different from the previous two embodiments in that it provides a water energy utilization improvement rate calculation system based on natural water power generation capacity, including a data acquisition module, a power generation calculation module, a water energy utilization improvement rate calculation module, a cascade hydropower station processing module and an assessment period duration optimization module.

[0097] Among them, the data acquisition module is responsible for obtaining the natural water volume entering the reservoir of each hydropower station during the assessment period;

[0098] The power generation calculation module calculates the power generation required for each hydropower station based on the natural water inflow;

[0099] The water energy utilization improvement rate calculation module substitutes the expected power generation into the water energy utilization improvement rate calculation formula to calculate the water energy utilization improvement rate of each hydropower station;

[0100] The cascade hydropower station processing module is responsible for calculating the sum of the power generation required by each cascade station and the summary of the natural flow in the interval;

[0101] In addition, the assessment period duration optimization module adjusts the duration of the assessment period according to actual needs to achieve the optimal value of 24 hours.

[0102] It should be noted that the data acquisition module specifically includes the collection of actual inflow water volume of a single hydropower station and the summary of interval natural flow data of cascade hydropower stations. The power generation calculation module specifically includes the calculation of the power generation capacity without water abandonment, the calculation of the power generation capacity with water abandonment, the acquisition of energy storage change value and the calculation of the power generation capacity (the sum of the power generation capacity and the energy storage change value).

[0103] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0104] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the 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 (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0105] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0106] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logical functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc. It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to be limiting. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications should be encompassed by the claims of the present invention.

[0107] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. 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 method for calculating the water energy utilization improvement rate based on the natural water power generation capacity, characterized by: include, Obtain the amount of natural water entering the reservoir of each hydropower station during the assessment period; Calculate the amount of power generated by the natural water of each hydropower station based on the natural water amount; The required power generation is substituted as the assessment power into the calculation formula of the water energy utilization improvement rate to calculate the water energy utilization improvement rate of each hydropower station.

2. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to claim 1, characterized in that: Calculating the required power generation of the natural water of each hydropower station based on the natural water flow specifically includes the following steps: According to whether each hydropower station has abandoned water during the assessment period, the power generation capacity of each hydropower station using natural water is obtained; Obtaining the energy storage change value of each hydropower station within the same assessment period as the power generation capacity; The power generation capacity of each hydropower station and the corresponding energy storage change value are added together to obtain the power generation capacity of each hydropower station.

3. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to claim 2, characterized in that: According to whether each hydropower station has abandoned water during the assessment period, the power generation capacity of each hydropower station using natural water is obtained, which specifically includes the following steps: If each hydropower station does not abandon water during the assessment period, the power generation capacity is calculated based on the corresponding natural water inflow, head and power station output coefficient of each hydropower station during the assessment period; When each hydropower station abandons water during the assessment period, the power generation capacity is calculated based on the corresponding power generation load rate and expected output on the day of abandonment during the assessment period.

4. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to any one of claims 1 to 3, characterized in that: Obtain the amount of natural water flowing into the reservoir of each hydropower station during the assessment period, including: When there is only one hydropower station and no upstream hydropower station, the natural water inflow is the actual inflow of water to the hydropower station.

5. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to any one of claims 1 to 3, characterized in that: Obtain the amount of natural water flowing into the reservoir of each hydropower station during the assessment period, including: When the hydropower station is a cascade hydropower station, the natural water inflow is the sum of the interval natural flow of any hydropower station and the interval natural flow of each upstream hydropower station.

6. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to claim 5, characterized in that: The calculation of the required power generation of the natural water of each hydropower station based on the natural water flow also includes: When the hydropower station is a cascade hydropower station, the required power generation of the cascade hydropower station is the sum of the required power generation of each station in the cascade.

7. The method for calculating the water energy utilization improvement rate based on the natural water power generation capacity according to claim 6, characterized in that: The optimal length of the assessment period is 24 hours.

8. A system using the method for calculating the water energy utilization improvement rate based on natural water power generation capacity according to any one of claims 1, 2, 3, 6 and 7, characterized in that: It includes a data acquisition module responsible for obtaining the amount of natural water entering the reservoir of each hydropower station during the assessment period; The power generation calculation module calculates the power generation required for each hydropower station based on the natural water inflow; The water energy utilization improvement rate calculation module substitutes the expected power generation into the water energy utilization improvement rate calculation formula to calculate the water energy utilization improvement rate of each hydropower station; The cascade hydropower station processing module is responsible for calculating the sum of the power generation required by each cascade station and the summary of the natural flow in the interval; In addition, the assessment period duration optimization module adjusts the duration of the assessment period according to actual needs to achieve the optimal value of 24 hours.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity described in the claims are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for calculating the water energy utilization improvement rate based on the natural water power generation capacity described in the claims are implemented.

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