A Method for Efficient Evaluation of Hydropower Unit Operation Based on Multi-Dimensional Data Comparison of Hydropower Stations

Abstract

This invention provides a method for evaluating the operational energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations. The method includes: S1, collecting data information on hydropower units in the hydropower station, including basic data and historical operating data; S2, evaluating the current energy efficiency status of the units, the energy efficiency improvement after technical upgrades, and the demand for and adaptability of new energy complementarity; S3, combining the evaluation of the current energy efficiency status and the evaluation of the energy efficiency improvement after technical upgrades, and performing a comprehensive energy efficiency score for the units, using the comprehensive energy efficiency score as the basis for determining whether to upgrade the hydropower station units. This invention allows for the evaluation of the operational energy efficiency of hydropower units of different models and reservoir capacities from multiple dimensions, including hydropower station hydrological parameters, hydropower unit design parameters, operating parameters, and the demand for and adaptability of new energy complementarity. It forms a quantifiable evaluation method, facilitating horizontal comparisons between different types of power stations.

Description

Technical Field

[0001] This invention belongs to the field of hydropower station turbine generator unit evaluation technology, specifically involving a hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations. Background Technology

[0002] Currently, the main energy efficiency indicators of hydropower units (unit output, turbine efficiency, generator efficiency, etc.) are mainly reflected through contract documents, model tests, and field tests. The indicators in the contract documents are the expected values ​​filled in by each hydropower unit manufacturer based on its own R&D and design capabilities. Due to various limitations, model tests and field tests can only verify the indicators under certain operating conditions, which have certain limitations and time constraints, and cannot reflect the overall energy efficiency level of hydropower units. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for scoring the operating energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations, so as to solve at least one of the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, one or more embodiments of this application provide a method for scoring the operational energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations, comprising the following steps:

[0005] S1. Collect data information from the hydropower station's hydro-generator units, including basic data and historical operating data;

[0006] S2. Evaluate the current energy efficiency of the unit and the energy efficiency improvement after the unit's technical transformation;

[0007] S3. Evaluate whether the generating unit has a need for complementary new energy sources and its adaptability;

[0008] S4. Based on the evaluation of the current energy efficiency of the generating units and the evaluation of the energy efficiency improvement after the technical transformation of the generating units, conduct a comprehensive score of the energy efficiency of the generating units, and use the comprehensive score of the energy efficiency of the generating units as the basis for determining whether to transform the generating units of the hydropower station.

[0009] Based on the above technical solution of the present invention, the following improvements can also be made:

[0010] Optionally, the basic data includes the unit commissioning time, the modification time of the main components of the unit, the installed capacity and single unit capacity, the rated head and weighted average head, the rated speed, the turbine specific speed, the demand for complementary new energy sources and their adaptability.

[0011] The historical operating data includes the power station's hourly / daily inflow, outflow, power generation, water wastage, and unit output; as well as the power station's inflow, outflow, power generation, water wastage, and power generation over many years.

[0012] The evaluation model for the current energy efficiency of the hydropower unit uses the following three evaluation indicators to evaluate the current energy efficiency of the unit: unit reliability, unit energy conversion rate, and hydropower utilization efficiency.

[0013] The reliability evaluation method for the generating unit is as follows:

[0014] The unit reliability assurance rate is used as the evaluation index for unit reliability, denoted as A1;

[0015] Before technical upgrades to the hydropower units, the unit reliability guarantee rate was based on... The calculation is performed, where Y1 represents the number of years the unit has been in use; Y max The expected service life of the generating unit;

[0016] After the technical upgrade of the hydropower units, the unit reliability guarantee rate was as follows: Perform calculations, and Where Y2 represents the number of years the lifespan is restored after the modification; Y t W represents the number of years the turbine has been in operation since its modification. t W is the weighting factor for turbine retrofitting. t =0.65; W g W is the weighting factor for the retrofitting of the hydro-generator. g =0.35; Y g This refers to the number of years the hydro-generator has been in operation after modification.

[0017] The evaluation method for unit energy efficiency conversion rate is as follows:

[0018] The comparison value of power generation water consumption rate is used as the evaluation index of unit energy efficiency conversion rate, denoted as B1;

[0019] Power generation water consumption rate according to The calculation is performed, where E represents the average annual power generation of the power station; Q represents the average annual power generation of the power station. 发电 Average annual hydropower generation;

[0020] The baseline value for rated head water consumption rate is calculated using the following formula: ;

[0021] The weighted average head consumption rate benchmark value is calculated using the following formula: ;

[0022] Where, ε r : The baseline value of water consumption rate calculated based on rated head; H r Rated head; ε w : Baseline value of water consumption rate calculated using weighted average head; H w Weighted average head;

[0023] If the power station design includes a weighted average head value, the corresponding calculated value will be used as the benchmark for water consumption rate comparison. If there is no weighted average head, the calculated value corresponding to the rated head will be used as the benchmark for water consumption rate comparison.

[0024] The comparison value of power generation water consumption rate is or ; .

[0025] The evaluation method for hydropower utilization efficiency is as follows:

[0026] Water utilization rate is used as the evaluation index of unit water energy utilization efficiency, denoted as C1;

[0027] The formula for calculating the power plant energy efficiency conversion index is defined as follows: Where E represents the average annual power generation of the power station; V represents the average annual power generation of the power station. t N: Power plant regulating reservoir capacity; Q: Power plant installed capacity; 入库 The average annual inflow of water into the power station;

[0028] The formula for calculating water utilization rate is as follows: Among them, U m : Multi-year average water utilization rate; Q 弃水 The average annual water discharge of the power station;

[0029] When the energy efficiency conversion index C e For power stations with a capacity greater than 50 and those possessing cascade regulation capabilities, the corresponding water utilization rate benchmark value is calculated using the following formula: ;

[0030] When the energy efficiency conversion index C e For power stations with a capacity of less than 50 and those without cascade regulation capabilities, the corresponding benchmark value for water utilization rate is calculated using the following formula: ;

[0031] in, =C1.

[0032] Step S2 includes:

[0033] Based on the current level of technology, the expected capacity that the unit can achieve after technical transformation is compared with the current unit capacity. The increase in unit capacity is used as the evaluation index for the improvement of unit capacity, and the increase in unit capacity is denoted as A2.

[0034] Under the same hydrological year conditions, the increase in the multi-year average power generation after technical transformation and the design average power generation is calculated, and it is used as the evaluation index for the improvement of unit power generation capacity, denoted as B2.

[0035] The increase in the specific speed of the turbine after the technical upgrade was calculated and used as an evaluation index for the improvement of the unit's energy efficiency, denoted as C2.

[0036] Step S3 includes:

[0037] After complementary operation, significant defects appeared in the unit components: such as cracks in the impeller blades, main shaft and top cover, which are recorded as A3;

[0038] After complementary operation, the stable operating range of the existing units is denoted as B3.

[0039] Step S4 includes:

[0040] The current energy efficiency of the generating unit and the improvement in energy efficiency after technical upgrades are scored separately. The scoring principle is that the higher the energy efficiency evaluation index of the generating unit, the higher the score, and the higher the increase of each index after technical upgrades, the higher the score.

[0041] Comprehensive score of unit energy efficiency status The unit's energy efficiency index improved after the technical upgrade. If the generating unit does not require complementary operation with new energy sources, the score will be [not specified]. If there is a need to coordinate with the operation of new energy complementary systems, points will be awarded. .

[0042] Finally, a comprehensive energy efficiency evaluation of the power plant units is conducted by combining the current energy efficiency score and the energy efficiency improvement score after technological upgrades. This comprehensive energy efficiency evaluation reflects the overall needs for capacity expansion, efficiency improvement, and quality enhancement. A higher score indicates a higher need and prioritizes technological upgrades for these units. The final comprehensive energy efficiency score for the hydropower plant units is... .

[0043] The beneficial effects of this invention are that it provides a method for evaluating the operational energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations. This invention allows for the evaluation of the operational energy efficiency of hydropower units of different models and regulating reservoir capacities from multiple dimensions, including capacity, power generation, specific speed, unit reliability guarantee rate, power generation water consumption rate, multi-year average water utilization rate, power station energy efficiency conversion index, unit reliability, unit energy efficiency conversion, water energy utilization, capacity increase, power generation, and specific speed improvement, as well as hydropower station hydrological parameters, hydropower unit design parameters, operating parameters, new energy complementary demand, and their adaptability. This forms a quantifiable evaluation method, facilitating horizontal comparisons between different types of power stations. Attached Figure Description

[0044] Figure 1 This is a schematic diagram illustrating the principle of a hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations, according to an embodiment of the present invention.

[0045] Figure 2This is a schematic diagram of the water consumption rate statistical curve corresponding to the rated head in a hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations, according to an embodiment of the present invention.

[0046] Figure 3 This is a schematic diagram of the water consumption rate corresponding to the average head of formaldehyde in a hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations, according to an embodiment of the present invention.

[0047] Figure 4 This is a schematic diagram of the energy efficiency conversion index and water utilization rate statistical curves of a hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations, according to an embodiment of the present invention. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0049] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in one or more embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] like Figure 1 As shown in one or more embodiments of this application, a method for scoring the operational energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations is provided. The method includes the following steps:

[0051] S1. Collect data information from the hydropower station's hydro-generator units, including basic data and historical operating data;

[0052] S2. Evaluate the current energy efficiency of the unit and the energy efficiency improvement after the unit's technical transformation;

[0053] S3. Evaluate whether the generating unit has a need for complementary new energy sources and its adaptability;

[0054] S4. Based on the evaluation of the current energy efficiency of the generating units and the evaluation of the energy efficiency improvement after the technical transformation of the generating units, conduct a comprehensive score of the energy efficiency of the generating units, and use the comprehensive score of the energy efficiency of the generating units as the basis for determining whether to transform the generating units of the hydropower station.

[0055] Understandably, existing hydropower unit energy efficiency indicators mainly combine historical hydrological conditions of hydropower stations to predict the capacity, power generation, and power generation efficiency of hydropower units and verify the indicators of some operating conditions through experiments. They can only be compared for individual power stations and are limited by historical hydrological conditions, thus having certain time and limitations. Therefore, it is essential to establish a unified evaluation model and operational energy efficiency scoring method.

[0056] Specifically, in this embodiment, basic data of the power station is collected, including: unit commissioning time, modification time of major unit components, installed capacity and single unit capacity, rated head and weighted average head of the unit, rated speed of the unit, turbine specific speed, demand for complementary new energy sources and their adaptability. Multi-year operating data from the hydropower station's real-time hydrological system is also collected, including: hourly / daily inflow, outflow, power generation, water discharge, and unit output; and multi-year inflow, outflow, power generation, water discharge, and power generation.

[0057] Then, based on the collected data parameters, a unit energy efficiency evaluation model is constructed to evaluate the current energy efficiency of the unit and the energy efficiency improvement after technical transformation. The process includes evaluating the unit reliability guarantee rate, the power generation water consumption rate, the power plant energy efficiency conversion index and water utilization rate, the unit capacity increase, the unit's multi-year average power generation increase, the comparative speed increase, and the demand for and adaptability of new energy complementarity. Based on this, a comprehensive evaluation of the unit's operating energy efficiency is conducted, which serves as the basis for evaluating whether to carry out transformation.

[0058] Specifically, the reliability evaluation method for the generating unit is as follows:

[0059] The unit reliability assurance rate is used as the evaluation index for unit reliability, denoted as A1;

[0060] The unit reliability guarantee rate is the calculated value of the service life plus the specified service life. Before technical renovation of the hydropower unit, the unit reliability guarantee rate is calculated according to... The calculation is performed, where Y1 represents the number of years the unit has been in use; Y max This represents the expected service life of the generating unit; as shown in the table below, the relationship between the rated power of the generating unit and its expected service life varies:

[0061] Table 1

[0062]

[0063] After technical upgrades to key components of the turbine and generator (turbine runner, guide vane mechanism, generator stator and rotor), the unit's reliability assurance rate was achieved according to... Perform calculations, and Where Y2 represents the number of years the lifespan is restored after the modification; Y t W represents the number of years the turbine has been in operation since its modification. t W is the weighting factor for turbine retrofitting. t =0.65; W g W is the weighting factor for the retrofitting of the hydro-generator. g =0.35; Y g This refers to the number of years the hydro-generator has been in operation after modification.

[0064] The evaluation method for unit energy efficiency conversion rate is as follows:

[0065] The comparison value of power generation water consumption rate is used as the evaluation index of unit energy efficiency conversion rate, denoted as B1;

[0066] The power generation water consumption rate refers to the ratio of water used for power generation to the power generated by the unit. The power generation water consumption rate is calculated according to... The calculation is performed, where E represents the average annual power generation of the power station; Q represents the average annual power generation of the power station. 发电 Average annual hydropower generation;

[0067] Based on the curves and corresponding calculation formulas fitted from the statistical data of rated head, weighted average head, and multi-year average water consumption rate of multiple power stations, the calculated value is used as the benchmark value for measuring water consumption rate.

[0068] The baseline value for rated head water consumption rate is calculated using the following formula: ,like Figure 2 As shown;

[0069] The weighted average head consumption rate benchmark value is calculated using the following formula: ,like Figure 3 As shown;

[0070] Where, ε r : The baseline value of water consumption rate calculated based on rated head; H r Rated head; ε w : Baseline value of water consumption rate calculated using weighted average head; H w Weighted average head;

[0071] Considering that the data statistically based on the rated head has a relatively large dispersion, if the power station design has a weighted average head value, the corresponding calculated value will be used as the benchmark for water consumption rate comparison; if there is no weighted average head, the calculated value corresponding to the rated head will be used as the benchmark for water consumption rate comparison.

[0072] The comparison value of power generation water consumption rate is or ; .

[0073] The evaluation method for hydropower utilization efficiency is as follows:

[0074] Water utilization rate is used as the evaluation index of unit water energy utilization efficiency, denoted as C1;

[0075] The power plant energy efficiency conversion index is a calculated value based on the power plant's power generation, regulating reservoir capacity, inflow of water, and installed capacity. The formula for calculating the power plant energy efficiency conversion index is defined as follows: Where E represents the average annual power generation of the power station; V represents the average annual power generation of the power station. t N: Power plant regulating reservoir capacity; Q: Power plant installed capacity; 入库 The average annual inflow of water into the power station;

[0076] The formula for calculating water utilization rate is as follows: Among them, U m : Multi-year average water utilization rate; Q 弃水 The average annual water discharge of the power station;

[0077] Based on the energy efficiency conversion index calculated for each power station and the curve fitted to the multi-year average water utilization rate, along with the corresponding calculation formula, the calculated value of this formula is used as the benchmark value for measuring water utilization rate. Figure 4 As shown;

[0078] When the energy efficiency conversion index C e For power stations with a capacity greater than 50 and those possessing cascade regulation capabilities, the corresponding water utilization rate benchmark value is calculated using the following formula: ;

[0079] For power plants with an energy efficiency conversion index Ce less than 50 and lacking cascade regulation capabilities, the corresponding water utilization rate benchmark value is calculated using the following formula: ;

[0080] in, =C1.

[0081] Step S2 includes:

[0082] Based on the current level of technology, the expected capacity that the unit can achieve after technical transformation is compared with the current unit capacity. The increase in unit capacity is used as the evaluation index for the improvement of unit capacity, and the increase in unit capacity is denoted as A2.

[0083] Under the same hydrological year conditions, the increase in the multi-year average power generation after technical transformation and the design average power generation is calculated, and it is used as the evaluation index for the improvement of unit power generation capacity, denoted as B2.

[0084] The increase in the specific speed of the turbine after the technical upgrade was calculated and used as an evaluation index for the improvement of the unit's energy efficiency, denoted as C2.

[0085] Step S3 includes:

[0086] After complementary operation, significant defects appeared in the unit components: such as cracks in the impeller blades, main shaft and top cover, which are recorded as A3;

[0087] After complementary operation, the stable operating range of the existing units is denoted as B3.

[0088] Step S4 includes:

[0089] The unit's current energy efficiency and the improvement in energy efficiency after technical upgrades are both scored. The current energy efficiency reflects the unit's energy utilization level within a stable hydrological period. The better the unit's energy efficiency, the higher its efficiency in converting hydropower into electrical energy, and the higher its score. For example, the detailed scoring method is shown in the table below:

[0090]

[0091] The energy efficiency improvement after the technical transformation of the unit is scored. The greater the improvement of the unit's energy efficiency indicators after performance improvement, the higher its score.

[0092] The scoring method for energy efficiency improvement through unit technical upgrades is shown in the table below:

[0093]

[0094] The following table shows whether the generating units require complementary operation with new energy sources and their adaptability evaluation:

[0095]

[0096] Comprehensive score of unit energy efficiency status The unit's energy efficiency index improved after the technical upgrade. If the generating unit has no need for complementary operation with new energy sources, the score EE3 = 100; if there is a need for complementary operation with new energy sources, the score is...

[0097] Finally, a comprehensive energy efficiency evaluation of the power plant units is conducted by combining the current energy efficiency score and the energy efficiency improvement score after technological upgrades. This comprehensive energy efficiency evaluation reflects the overall needs for capacity expansion, efficiency improvement, and quality enhancement. A higher score indicates a higher need and prioritizes technological upgrades for these units. The final comprehensive energy efficiency score for the hydropower plant units is... .

[0098] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0099] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A system that specifies functions in one or more boxes.

[0100] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction set implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0101] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0102] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0103] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for evaluating the operational energy efficiency of hydropower units based on multi-dimensional data comparison of hydropower stations, characterized by: It includes the following steps: S1. Collect data information from the hydropower station's hydro-generator units, including basic data and historical operating data; S2. Evaluate the current energy efficiency of the unit and the energy efficiency improvement after the unit's technical transformation; The current energy efficiency of the generating units is evaluated based on unit reliability, unit energy efficiency conversion rate, and hydropower utilization efficiency. This includes: using the unit reliability guarantee rate K as the evaluation index for unit reliability, denoted as A1; using the comparison value of power generation water consumption rate as the evaluation index for unit energy efficiency conversion rate, denoted as B1; and using the water utilization rate as the evaluation index for unit hydropower utilization efficiency, denoted as C1. The evaluation of energy efficiency improvement after unit technical upgrades includes: based on the existing technical level, predicting the capacity that the unit can achieve after technical upgrades, and comparing it with the current unit capacity, using the increase in unit capacity as the evaluation index for unit capacity improvement, denoted as A2; under the same hydrological year conditions, calculating the increase in the multi-year average power generation after technical upgrades compared to the design average power generation, and using it as the evaluation index for unit power generation capacity improvement, denoted as B2; calculating the increase in the specific speed of the turbine after technical upgrades, and using it as the evaluation index for unit energy efficiency improvement, denoted as C2. S3. Evaluate whether the generating units have a need for complementary renewable energy sources and their adaptability. The evaluation of the adaptability of generating units with a need for complementary renewable energy sources includes: if defects occur in the unit components after complementary operation, it is recorded as A3; after complementary operation, the stable operating range of the existing generating units that meets the grid dispatch requirements is recorded as B3. S4. Combining the current energy efficiency evaluation of the unit with the evaluation of energy efficiency improvement after the unit's technical upgrades, conduct a comprehensive energy efficiency score for the unit's operation, including: scoring the current energy efficiency of the unit's operation, the extent of energy efficiency improvement after the technical upgrades, and the demand for complementary new energy sources and their adaptability; and a comprehensive score for the current energy efficiency of the unit. The unit's energy efficiency index improved after the technical upgrade. If the generating unit does not require complementary operation with new energy sources, the score will be [not specified]. If there is a need to coordinate with the operation of new energy complementary systems, points will be awarded. The comprehensive energy efficiency score of the generating units will be used as the basis for determining whether to modify the hydropower station generating units.

2. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 1, characterized in that, The basic data includes the unit commissioning time, the modification time of the main components of the unit, the installed capacity and single unit capacity, the rated head and weighted average head, the rated speed, the turbine specific speed, the demand for complementary new energy sources and their adaptability.

3. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 2, characterized in that, The historical operating data includes the power station's hourly / daily inflow, outflow, power generation, water wastage, and unit output; as well as the power station's inflow, outflow, power generation, water wastage, and power generation over many years.

4. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 3, characterized in that, The unit reliability evaluation method is as follows: Before technical upgrades to the hydropower units, the unit reliability guarantee rate was based on... The calculation is performed, where Y1 represents the number of years the unit has been in use; Y max The expected service life of the generating unit; After the technical upgrade of the hydropower units, the unit reliability guarantee rate was as follows: Perform calculations, and Where Y2 represents the number of years the lifespan is restored after the modification; Y t W represents the number of years the turbine has been in operation since its modification. t W is the weighting factor for turbine retrofitting. t =0.65; W g W is the weighting factor for the retrofitting of the hydro-generator. g =0.35; Y g This refers to the number of years the hydro-generator has been in operation after modification.

5. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 3, characterized in that, The evaluation method for unit energy efficiency conversion rate is as follows: Power generation water consumption rate according to The calculation is performed, where E represents the average annual power generation of the power station; Q represents the average annual power generation of the power station. 发电 Average annual hydropower generation; The baseline value for rated head water consumption rate is calculated using the following formula: ; The weighted average head consumption rate benchmark value is calculated using the following formula: ; Where, ε r : The baseline value of water consumption rate calculated based on rated head; H r Rated head; ε w : Baseline value of water consumption rate calculated using weighted average head; H w Weighted average head; If the power station design includes a weighted average head value, the corresponding calculated value will be used as the benchmark for water consumption rate comparison. If there is no weighted average head, the calculated value corresponding to the rated head will be used as the benchmark for water consumption rate comparison. The comparison value of power generation water consumption rate is or ; .

6. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 3, characterized in that, The evaluation method for hydropower utilization efficiency is as follows: The formula for calculating the power plant energy efficiency conversion index is defined as follows: Where E represents the average annual power generation of the power station; V represents the average annual power generation of the power station. t N: Power plant regulating reservoir capacity; Q: Power plant installed capacity; 入库 The average annual inflow of water into the power station; The formula for calculating water utilization rate is as follows: Among them, U m : Multi-year average water utilization rate; Q 弃水 The average annual water discharge of the power station; When the energy efficiency conversion index C e For power stations with a capacity greater than 50 and those possessing cascade regulation capabilities, the corresponding water utilization rate benchmark value is calculated using the following formula: ; When the energy efficiency conversion index C e For power stations with a capacity of less than 50 and those without cascade regulation capabilities, the corresponding benchmark value for water utilization rate is calculated using the following formula: ; in, =C1.

7. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 1, characterized in that, Step S4 includes: The scoring principle is that the higher the unit's energy efficiency evaluation index, the higher the score; and the higher the increase in various indicators after technical transformation, the higher the score.

8. The hydropower unit operation energy efficiency scoring method based on multi-dimensional data comparison of hydropower stations as described in claim 7, characterized in that, The comprehensive energy efficiency score of the generating units will be used as the basis for determining whether to upgrade the hydropower station units. This includes a comprehensive evaluation of the power station units' energy efficiency, which combines the current energy efficiency score with the energy efficiency improvement score after technical upgrades. The comprehensive energy efficiency evaluation of the power station units reflects the overall demand for capacity expansion, efficiency improvement, and quality enhancement. The higher the score, the higher the corresponding demand, and the more priority should be given to technical upgrades. The final comprehensive energy efficiency score of the hydropower station units... .

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