Method and device for calculating power generation based on comprehensive utilization system of renewable energy

Abstract

The application discloses a power generation capacity calculation method and device based on a renewable energy comprehensive utilization system. The method obtains the power generation efficiency of a wind power generation system in a local region according to empirical data of wind power generation, and calculates the annual power generation capacity of the wind power generation system based on the power generation efficiency. The annual power generation capacity of a photovoltaic system in the local region is estimated according to historical light measurement data of a preset region containing the local region. The average power generation capacity of a tidal current power generation system is obtained at a rated flow rate according to a set tidal current flow rate, and the annual power generation capacity of the tidal current power generation system is calculated according to the average power generation capacity. The annual power generation capacity of a salinity power generation system is calculated according to the area of a permeable membrane and the power generation capacity in the salinity power generation system. The annual total power generation capacity is calculated according to the annual power generation capacities of the wind power generation system, the photovoltaic system, the tidal current power generation system and the salinity power generation system. The application designs the power generation capacity of the renewable energy comprehensive utilization system to meet the demand of power consumption.

Description

Technical Field

[0001] This invention relates to the field of power generation calculation technology, and in particular to a method and apparatus for calculating power generation based on a renewable energy integrated utilization system. Background Technology

[0002] With the large-scale integration of renewable energy sources such as wind and solar power, the power system will face a "dual-high" trend (high proportion of renewable energy and high proportion of power electronic equipment), which may lead to significant changes in the dynamic characteristics of the system and affect its stability. Especially during the transition from traditional power systems to the new generation of power systems with "dual-high" characteristics, the dynamic process is particularly complex, and power system stability analysis faces challenges.

[0003] In high-voltage and high-efficiency power systems, the stability problem under large disturbances is related not only to the characteristics of the system itself but also to the disturbances it experiences. Due to the high-dimensional and strongly nonlinear characteristics of power systems, stability analysis under large disturbances has always been a challenging area in the field of power system stability analysis.

[0004] In high-dimensional power systems, the number of dynamic components that need to be considered can reach 10⁵ to 10⁶, and the dynamic characteristics of various devices differ significantly, exhibiting high heterogeneity. How to achieve rapid stability analysis of ultra-high-dimensional systems is a crucial technical challenge.

[0005] In wind resource assessment, theoretical power generation is typically calculated based on site characteristics and wind turbine power curves. Accurately quantifying the annual power generation and fluctuations of a wind farm is crucial for evaluating its financial feasibility. However, domestic standards and reference materials lack strong guidance for project assessment, and the scientific validity of statistical results and the feasibility of methodologies still have significant room for improvement.

[0006] When calculating the power generation of a wind farm, it is necessary to calculate the power generation losses caused by factors such as the wind farm's location, operating conditions, and turbine type. The magnitude of the losses is region-dependent and depends on various influencing factors, including the environment, the type of turbine used, and the terrain. In addition, it is also necessary to consider the standard uncertainty of each stage in the wind resource assessment calculation, and calculate the overall standard uncertainty of the theoretical grid-connected power generation based on the uncertainties of each stage. Summary of the Invention

[0007] The present invention aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, this invention proposes a method for calculating power generation based on a comprehensive renewable energy utilization system. Research on solar photovoltaic power generation prediction methods can improve prediction accuracy. Enhancing renewable energy storage capacity, such as through pumped-storage hydroelectric power plants and long-term thermal storage solar thermal power generation, can promote both local and external consumption of renewable energy, thereby improving the utilization level of renewable energy. In power systems with a high proportion of renewable energy and power electronic equipment integrated, stability and reliability can be improved through large-disturbance stability analysis and rapid stability analysis of ultra-high-dimensional heterogeneous systems.

[0009] To achieve the above objectives, another aspect of the present invention proposes a power generation calculation device based on a renewable energy integrated utilization system.

[0010] To achieve the above objectives, this invention proposes a method for calculating power generation based on a comprehensive renewable energy utilization system, comprising:

[0011] The power generation efficiency of the local wind power system is obtained based on the power generation experience data of wind power generation, and the annual power generation of the wind power system is calculated based on the power generation efficiency.

[0012] Estimate the annual power generation of the photovoltaic system in the local area based on historical measured solar irradiance data of a preset area that includes the local area.

[0013] The average power generation of the tidal current power generation system is obtained at the rated flow velocity based on the set tidal current velocity, and the annual power generation of the tidal current power generation system is calculated based on the average power generation.

[0014] Calculate the annual power generation of the salinity gradient power generation system based on the area and power output of the permeable membrane in the system.

[0015] The total annual power generation is calculated based on the annual power generation of wind power systems, photovoltaic systems, tidal energy systems, and salinity gradient energy systems.

[0016] The power generation calculation method based on a renewable energy integrated utilization system according to the embodiments of the present invention may also have the following additional technical features:

[0017] In one embodiment of the present invention, assuming an annual effective wind duration of 6000 hours and a wind power generation system efficiency of 40%, the annual power generation of the wind power generation system is calculated as follows:

[0018] Q1=E1×F×η1=200×000×40%=48000(kW·h)

[0019] Where Q1 is the annual power generation of the wind power system, E1 is the rated power of the wind turbine, and η1 is the annual average power generation efficiency.

[0020] In one embodiment of the present invention, assuming that solar energy is used for power generation for 1300 hours per year, the annual power generation of the photovoltaic system is calculated as follows:

[0021] Q2=E2×H=60×1300=78000(kW·h)

[0022] Where Q2 is the annual power generation of the photovoltaic power generation system, E2 is the rated power of the solar photovoltaic array, and H is the annual utilization hours.

[0023] In one embodiment of the present invention, when the tidal flow velocity is 2-2.5 m / s at the rated flow velocity, the average power generation of the tidal power generation system is 40 kW. Assuming the system's power generation efficiency is 15%, the annual power generation of the tidal power generation system is:

[0024] Q3=E3×h×η2=50×8760×15%=65700(kW·h)

[0025] In the formula, Q3 is the annual power generation of the tidal current power generation system, h is the number of hours per year, and η2 is the power generation efficiency of the tidal current power generation system.

[0026] In one embodiment of the present invention, assuming 67 pre-defined type permeable membranes are used, the area of ​​the permeable membranes in the salinity gradient power generation system is 670 m². 2 The power generation capacity is 5kW, and the annual power generation of the salinity gradient energy generation system is:

[0027] Q4=E4×h×η3=5×8760×60%=26280(kW·h).

[0028] In one embodiment of the present invention, the total installed capacity of the platform is 135kW, and the total annual power generation is obtained from the power settings and power generation of each system, including the wind power generation system, the solar photovoltaic power generation system, the tidal power generation system, and the salinity gradient power generation system.

[0029] Q=Q1+Q2+Q3+Q4=217980 (kW·h).

[0030] To achieve the above objectives, a second aspect of this application provides a power generation calculation device based on a renewable energy integrated utilization system, comprising:

[0031] The annual wind power generation calculation module is used to obtain the power generation efficiency of the local wind power system based on the power generation experience data of wind power generation, and to calculate the annual power generation of the wind power system based on the power generation efficiency.

[0032] The photovoltaic annual power generation calculation module is used to estimate the annual power generation of the photovoltaic system in the local area based on the historical measured data of the local area's solar irradiance.

[0033] The tidal current power generation calculation module is used to obtain the average power generation of the tidal current power generation system at the rated flow velocity based on the set tidal current velocity, and to calculate the annual power generation of the tidal current power generation system based on the average power generation.

[0034] The annual power generation calculation module for salinity gradient energy is used to calculate the annual power generation of the salinity gradient energy power generation system based on the area of ​​the permeable membrane and the power output.

[0035] The annual total power generation calculation module is used to calculate the annual total power generation based on the annual power generation of wind power systems, photovoltaic systems, tidal power systems, and salinity gradient power systems.

[0036] This invention relates to a method and apparatus for calculating power generation based on a comprehensive renewable energy utilization system. Research on solar photovoltaic power generation prediction methods can improve prediction accuracy and increase the utilization level of renewable energy. Through large-disturbance stability analysis and rapid stability analysis of ultra-high-dimensional heterogeneous systems, the stability and reliability of the system can be improved. Predicting and scheduling renewable energy power generation can optimize the operation of the power system and improve the efficiency of power consumption arrangement and dispatch. Through the comprehensive utilization of renewable energy, such as solar heating, biomass heating, and geothermal heating, energy utilization efficiency can be improved and energy waste reduced.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 This is a flowchart of a method for calculating power generation based on a renewable energy integrated utilization system according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of a power generation calculation device based on a renewable energy integrated utilization system according to an embodiment of the present invention;

[0041] Figure 3 This is a structural diagram of a marine renewable energy integrated utilization system platform according to an embodiment of the present invention;

[0042] Among them, 1-wind power generation system; 2-salinity gradient power generation system; 3-tidal energy generation system; 4-battery energy storage system; 5-solar photovoltaic power generation system; 6-seawater desalination system. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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 scope of protection of the present invention.

[0045] The following description, with reference to the accompanying drawings, illustrates a method and apparatus for calculating power generation based on a comprehensive renewable energy utilization system, according to an embodiment of the present invention.

[0046] Figure 1 This is a flowchart of a method for calculating power generation based on a renewable energy integrated utilization system according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes:

[0047] S1. Obtain the power generation efficiency of the local wind power system based on the power generation experience data of wind power generation, and calculate the annual power generation of the wind power system based on the power generation efficiency.

[0048] S2, estimate the annual power generation of the photovoltaic system in the local area based on the historical measured data of the local area in the preset area;

[0049] S3, obtain the average power generation of the tidal current power generation system at the rated flow velocity according to the set tidal current velocity, and calculate the annual power generation of the tidal current power generation system based on the average power generation.

[0050] S4. Calculate the annual power generation of the salinity gradient power generation system based on the area of ​​the permeable membrane and the power output.

[0051] S5 calculates the total annual power generation based on the annual power generation of the wind power system, photovoltaic system, tidal energy system, and salinity gradient energy system.

[0052] Specifically, in order to meet the electricity demand in Daguan Island Village, this section designs the power generation capacity of the renewable energy integrated utilization system. Based on load forecasting, the power generation capacity of each power generation system is configured, and the specific equipment models and rated power designs are as follows:

[0053] Wind power generation system

[0054] This invention selects the LQ-20 wind turbine manufactured by Longquan Wind Turbine Manufacturing Co., Ltd. with a rated power of 20kW for design. Its main design parameters are shown in Table 1. The generator is a permanent magnet three-phase AC generator.

[0055] Table 1

[0056]

[0057] Based on the wind energy characteristics of Daguan Island, assuming an annual effective wind duration of 6000 hours, and according to experience with wind power generation, the power generation efficiency of a wind power system is approximately 40%. Therefore, the annual power generation of the wind power system is calculated as follows:

[0058] Q1=E1×F×η1=20×6000×40%=48000(kW·h)

[0059] Where Q1 is the annual power generation of the wind power system, E1 is the rated power of the wind turbine, and η1 is the annual average power generation efficiency.

[0060] Solar photovoltaic power generation system

[0061] After comparative analysis, the rated power of the solar photovoltaic power generation array in this invention is initially set at 60kW. YGE125 series photovoltaic cells manufactured by Yingli Group are selected for the photovoltaic array construction. The photovoltaic cells are 1.01m long and 0.99m wide. Performance parameters are shown in Table 2. Based on the performance parameters of the battery modules, approximately 480 battery modules (model 120) are needed to achieve a rated power of 60kW.

[0062] Table 2

[0063] Battery Model YGE125 Peak power 125W Component efficiency 12.51％ Peak power voltage 17.34V Peak power current 7.21A Open circuit voltage 21.46V short circuit current 7.74A Standard reference temperature 25℃ Standard light intensity <![CDATA[1000w / m 2 ]]>

[0064] Since there is currently no measured data on the solar irradiance utilization rate in the waters near Daguan Island, it is estimated based on official measured data from the Qingdao area that the annual solar power generation time is approximately 1300 hours. Therefore, the annual power generation of the photovoltaic system is calculated as follows:

[0065] Q2=E2×H=60×1300=78000(kW·h)

[0066] Where Q2 is the annual power generation of the photovoltaic power generation system, E2 is the rated power of the solar photovoltaic array, and H is the annual utilization hours.

[0067] Tidal Power Generation System

[0068] Currently, research on tidal power generation has just progressed from the laboratory research stage to the stage of marine practical application demonstration research, and has not yet entered industrial production. Therefore, referring to the experience of the "Wanxiang I" tidal experimental power station and the "Wanxiang I II" tidal power station, and based on similar data, the power generation capacity of tidal energy is inferred. In this invention, the turbine in the tidal power generation system is initially set as a vertical shaft tidal turbine with an installed capacity of 50kW, and its specific operating parameters are shown in Table 3.

[0069] Table 3

[0070] Rated power 50kW Rated flow rate 2m / s Maximum flow rate 4.2m / s Capture efficiency 35％-45％ Rated speed 29r / min blade diameter 3.8m Wheel hub diameter 0.37m Number of leaves 3 pieces Tip speed ratio 3.6 airfoil NACA0018

[0071] Because the power generation efficiency of tidal current energy is currently low, the average power generation of a tidal current power generation system is approximately 40kW when the tidal current velocity is between 2-2.5 m / s and the rated velocity. Based on the above analysis, assuming the system's power generation efficiency is 15%, the annual power generation of the tidal current power generation system is:

[0072] Q3=E3×h×η2=50×8760×15%=65700(kW·h)

[0073] In the formula, Q3 is the annual power generation of the tidal current power generation system, h is the number of hours per year, and η2 is the power generation efficiency of the tidal current power generation system.

[0074] Salinity gradient power generation system

[0075] This invention incorporates a seawater desalination system during the design process, combining a salinity gradient energy system with a seawater desalination system. Traditional salinity gradient energy power generation systems use ordinary seawater as the absorbent and freshwater as the feedstock. However, the system designed in this invention can directly supply the concentrated seawater discharged from the desalination process to the salinity gradient energy power generation system. The salinity of the desalinated seawater is approximately 50.000%. Referring to Table 3.2, the osmotic pressure of concentrated seawater with a concentration of 50.000% is 3.652 MPa. Therefore, the osmotic pressure difference across the membrane is 1.187 MPa. This is comparable to the osmotic pressure difference in traditional salinity gradient energy systems, but significantly reduces the cost of salinity gradient energy power generation.

[0076] Typically, a salinity gradient power generation system includes: a semi-permeable membrane module, a pressure exchanger, a concentrated and dilute seawater container, a filter, a high-pressure pump, a low-pressure pump, and a water turbine. In this invention, a water turbine with the model number XT14-0.3DCT4-Z and a power of 10kW and a cellulose acetate forward osmosis membrane 1301 manufactured by HTI are selected, and their specific parameters are shown in Table 4.

[0077] Table 4

[0078]

[0079] Assuming this invention uses 67 membranes of this type, the area of ​​the membranes in the salinity gradient power generation system is 670 m². 2 The power generation capacity is 5kW. Therefore, the annual power generation of the salinity gradient energy system is:

[0080] Q4=E4×h×η3=5×8760×60%=26280(kW·h)

[0081] Calculation of total annual power generation

[0082] Based on the power settings and power generation designs of the aforementioned wind power generation system, solar photovoltaic power generation system, tidal current power generation system, and salinity gradient power generation system, the total installed capacity of the platform is 135kW, and the total annual power generation is:

[0083] Q=Q1+Q2+Q3+Q4=21 7980(kW·h)

[0084] The power generation calculation method based on a renewable energy integrated utilization system according to embodiments of the present invention can improve the accuracy of prediction by studying solar photovoltaic power generation prediction methods. In power systems with a high proportion of renewable energy and power electronic equipment integrated, the stability and reliability of the system can be improved through large disturbance stability analysis and rapid stability analysis of ultra-high-dimensional heterogeneous systems. By predicting and scheduling renewable energy power generation, the operation of the power system can be optimized, and the efficiency of power consumption arrangement and dispatch can be improved. Through the integrated utilization of renewable energy, such as solar heating, biomass heating, and geothermal heating, energy utilization efficiency can be improved and energy waste can be reduced. Technical problems encountered in the power generation calculation process, such as the application of complex physical model prediction methods, can promote the progress and innovation of related technologies. By improving the power generation efficiency of renewable energy and reducing costs, the competitiveness of renewable energy in the energy market can be improved.

[0085] like Figure 2 As shown, the present invention also proposes a power generation calculation device 10 based on a renewable energy integrated utilization system, comprising:

[0086] The annual wind power generation calculation module 100 is used to obtain the power generation efficiency of the wind power generation system in the local area based on the power generation experience data of wind power generation, and to calculate the annual power generation of the wind power generation system based on the power generation efficiency.

[0087] The photovoltaic annual power generation calculation module 200 is used to estimate the annual power generation of the photovoltaic system in the local area based on the historical measured data of the local area in a preset area.

[0088] The tidal current annual power generation calculation module 300 is used to obtain the average power generation of the tidal current power generation system at the rated flow velocity according to the set tidal current flow velocity, and to calculate the annual power generation of the tidal current power generation system based on the average power generation.

[0089] The annual power generation calculation module 400 for salinity gradient energy is used to calculate the annual power generation of the salinity gradient energy power generation system based on the area of ​​the permeable membrane and the power output.

[0090] The Annual Total Power Generation Calculation Module 500 is used to calculate the annual total power generation based on the annual power generation of wind power systems, photovoltaic systems, tidal power systems, and salinity gradient power systems.

[0091] Furthermore, the annual wind power generation calculation module is also used to calculate the annual power generation of the wind power system, assuming an annual effective wind duration of 6000 hours and a power generation efficiency of 40%.

[0092] Q1=E1×F×η1=20×6000×40%=48000(kW·h)

[0093] Where Q1 is the annual power generation of the wind power system, E1 is the rated power of the wind turbine, and η1 is the annual average power generation efficiency.

[0094] Furthermore, the photovoltaic annual power generation calculation module is also used to calculate the annual power generation of the photovoltaic system, assuming that solar energy is used for 1300 hours of power generation per year:

[0095] Q2=E2×H=60×1300=78000(kW·h)

[0096] Where Q2 is the annual power generation of the photovoltaic power generation system, E2 is the rated power of the solar photovoltaic array, and H is the annual utilization hours.

[0097] Furthermore, the tidal current power generation calculation module is also used when the tidal current velocity is between 2-2.5 m / s, the average power generation of the tidal current power generation system is 40 kW, and assuming the system's power generation efficiency is 15%, then the annual power generation of the tidal current power generation system is:

[0098] Q3=E3×h×η2=50×8760×15%=65700(kW·h)

[0099] In the formula, Q3 is the annual power generation of the tidal current power generation system, h is the number of hours per year, and η2 is the power generation efficiency of the tidal current power generation system.

[0100] Furthermore, the marine renewable energy integrated utilization system designed in this invention comprises six parts, including a wind power generation system and a solar photovoltaic power generation system, and its platform layout structure diagram is shown below. Figure 3As shown.

[0101] The platform structure is a steel-concrete composite box-type floating platform, consisting of an upper deck (top plate), a lower deck (bottom plate), bulkheads, and side plates. The upper deck, lower deck, bulkheads, and wall panels are all encased in steel-concrete composite slabs, connected to the internal concrete using studs and other means. Compared to other platform structures, under similar draft and stress control levels, the steel-concrete composite box-type floating platform structure offers significant advantages in stability and load-bearing capacity.

[0102] The capacity configurations of the wind power generation system, salinity gradient power generation system, tidal current power generation system, and solar photovoltaic power generation system in the platform are shown above. The batteries in the battery energy storage section are lead-acid batteries manufactured by Hawker, with a single battery capacity of 13Ah and a DC voltage of 490V. The seawater desalination system uses a marine reverse osmosis seawater desalination unit, with the reverse osmosis membrane selected from the SWC series manufactured by Hydranautics, USA, and a daily desalination capacity of 5 tons.

[0103] from Figure 3 The platform layout reveals that the seawater desalination system is located on the left side, while the salinity gradient power generation system is symmetrically positioned on the right. The concentrated seawater produced by desalination is directly transported via pipeline to the concentrated seawater chamber of the salinity gradient power generation system on the right side of the platform. Seawater is directly extracted from the sea and enters the freshwater chamber. A permeable membrane separates the concentrated and freshwater chambers. Based on the concentration difference between the two, the freshwater flows through the membrane to the concentrated seawater chamber, increasing the liquid volume on the concentrated seawater side. This liquid then flows through a water pipe to flush a turbine located in the center of the platform, thereby driving the turbine to generate electricity. The mixed seawater can be directly discharged into the sea without impacting the marine ecosystem. The entire seawater desalination system is housed in sealed containers, with photovoltaic panels laid flat on top for solar photovoltaic power generation. This arrangement maximizes the use of platform space, minimizing the platform's area. A wind turbine is placed near the central axis on the upper left side of the platform. The tidal power generation system is diagonally symmetrical to the wind turbine to ensure platform stability and balance. The battery energy storage device is arranged as follows... Figure 3 As shown, no further explanation is needed here.

[0104] In summary, the system designed in this invention is a comprehensive marine renewable energy utilization system that integrates four power generation systems (wind, solar, tidal, and salinity gradient), a seawater desalination system, and a battery system. Due to the advantageous geographical location of Daguan Island, its surrounding waters possess abundant wind, solar, tidal, and salinity gradient energy resources. Therefore, a rationally designed power generation system can effectively meet the power supply needs of Daguan Island and promote its economic development.

[0105] In addition, the platform system design integrates the seawater desalination system and the salinity gradient power generation system, offering advantages over traditional seawater desalination and salinity gradient power generation systems, including self-sufficiency in system power, overcoming site selection limitations, reducing device size, increasing flexibility, increasing osmotic pressure difference, and improving overall power generation efficiency.

[0106] (1) From the perspective of reducing energy consumption: The seawater salinity gradient power generation system is used in conjunction with the seawater desalination system. Using the effluent (concentrated seawater) from the desalination system as the extractant and ordinary seawater as the feedstock, the chemical potential energy of water is converted into the electrical energy we need using the principle of osmosis. While producing fresh water, the system also provides electricity generated from wind, solar, tidal, and salinity gradient energy sources, compensating for the overall system's energy consumption and achieving self-sufficiency in electricity. This reduces the cost of seawater desalination and improves the overall economic performance of the system.

[0107] (2) From the perspective of system site selection: Traditional salinity gradient (SGR) power generation systems mainly use ordinary seawater and freshwater as the extractant and feedstock for power generation. This means that the site selection for SGR power generation systems must be at river estuaries where both freshwater and ordinary seawater are available, making it difficult to develop SGR energy in areas lacking freshwater. The marine renewable energy integrated utilization system designed in this invention enables the use of SGR energy for power generation in areas with scarce freshwater resources, which can alleviate the problem of freshwater shortage on isolated islands to a certain extent.

[0108] (3) From the perspective of power generation economics: Traditional salinity gradient (SGR) power generation systems use ordinary seawater as the extractant and freshwater as the feedstock for power generation. In my country, due to severe freshwater pollution, the pretreatment process for freshwater is costly. In this system, seawater pretreatment only requires simple conventional treatment, thus reducing costs to some extent. Currently, the efficiency of salinity gradient power plants is not very high. The latest salinity gradient power plant in the Netherlands has a power output of 1.3 W / m², while the salinity gradient power generation system designed in this invention has a power output of 7.5 W / m², representing a certain improvement in power generation efficiency.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0110] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for calculating power generation based on a renewable energy integrated utilization system, characterized in that, include: The power generation efficiency of the local wind power system is obtained based on the power generation experience data of wind power generation, and the annual power generation of the wind power system is calculated based on the power generation efficiency. Estimate the annual power generation of the photovoltaic system in the local area based on historical measured solar irradiance data of a preset area that includes the local area. The average power generation of the tidal current power generation system is obtained at the rated flow velocity based on the set tidal current velocity, and the annual power generation of the tidal current power generation system is calculated based on the average power generation. Calculate the annual power generation of the salinity gradient power generation system based on the area of ​​the permeable membrane and the power output. The total annual power generation is calculated based on the annual power generation of wind power systems, photovoltaic systems, tidal power systems, and salinity gradient power systems.

2. The method according to claim 1, characterized in that, Assuming an annual effective wind duration of 6000 hours and a wind power generation system efficiency of 40%, the annual power generation of the wind power generation system is calculated as follows: Q1=E1×F×η1=20×6000×40%=48000(kW·h) Where Q1 is the annual power generation of the wind power system, E1 is the rated power of the wind turbine, and η1 is the annual average power generation efficiency.

3. The method according to claim 2, characterized in that, Assuming that solar energy is used for power generation for 1300 hours per year, the annual power generation of the photovoltaic system is calculated as follows: Q2=E2×H=60×1300=78000(kW·h) Where Q2 is the annual power generation of the photovoltaic power generation system, E2 is the rated power of the solar photovoltaic array, and H is the annual utilization hours.

4. The method according to claim 3, characterized in that, When the tidal flow velocity is between 2 and 2.5 m / s at the rated velocity, the average power generation of the tidal power generation system is 40 kW. Assuming the system's power generation efficiency is 15%, the annual power generation of the tidal power generation system is: Q3=E3×h×η2=50×8760×15%=65700(kW·h) In the formula, Q3 is the annual power generation of the tidal current power generation system, h is the number of hours per year, and η2 is the power generation efficiency of the tidal current power generation system.

5. The method according to claim 4, characterized in that, Assuming 67 pre-defined type permeable membranes are used, the area of ​​the permeable membranes in the salinity gradient power generation system is 670 m². 2 The power generation capacity is 5kW, and the annual power generation of the salinity gradient energy generation system is: Q4=E4×h×η3=5×8760×60%=26280 (kW·h).

6. The method according to claim 5, characterized in that, Based on the power settings and power generation of each system—wind power, solar photovoltaic power, tidal current power, and salinity gradient power—the total installed capacity of the platform is 135kW, and the total annual power generation is: Q=Q1+Q2+Q3+Q4=221780 (kW·h).

7. A power generation calculation device based on a renewable energy integrated utilization system, characterized in that, include: The annual wind power generation calculation module is used to obtain the power generation efficiency of the local wind power system based on the power generation experience data of wind power generation, and to calculate the annual power generation of the wind power system based on the power generation efficiency. The photovoltaic annual power generation calculation module is used to estimate the annual power generation of the photovoltaic system in the local area based on the historical measured data of the local area's solar irradiance. The tidal energy annual power generation calculation module is used to obtain the average power generation of the tidal energy power generation system at the rated flow velocity based on the set tidal flow velocity, and to calculate the annual power generation of the tidal energy power generation system based on the average power generation. The annual power generation calculation module for salinity gradient energy is used to calculate the annual power generation of the salinity gradient energy power generation system based on the area of ​​the permeable membrane and the power output. The annual total power generation calculation module is used to calculate the annual total power generation based on the annual power generation of wind power systems, photovoltaic systems, tidal power systems, and salinity gradient power systems.

8. The apparatus according to claim 7, characterized in that, The wind power annual power generation calculation module is also used to calculate the annual power generation of the wind power system, assuming an annual effective wind duration of 6000 hours and a power generation efficiency of 40%. Q1=E1×F×η1=20×6000×40%=48000(kW·h) Where Q1 is the annual power generation of the wind power system, E1 is the rated power of the wind turbine, and η1 is the annual average power generation efficiency.

9. The apparatus according to claim 7, characterized in that, The photovoltaic annual power generation calculation module is also used to calculate the annual power generation of the photovoltaic system, assuming that the solar energy is used for 1300 hours of power generation per year: Q2=E2×H=60×1300=78000(kW·h) Where Q2 is the annual power generation of the photovoltaic power generation system, E2 is the rated power of the solar photovoltaic array, and H is the annual utilization hours.

10. The apparatus according to claim 7, characterized in that, The tidal current power generation calculation module is also used when the tidal current velocity is between 2-2.5 m / s, the average power generation of the tidal current power generation system is 40 kW, and assuming the system's power generation efficiency is 15%, then the annual power generation of the tidal current power generation system is: Q3=E3×h×η2=50×8760×15%=65700(kW·h) In the formula, Q3 is the annual power generation of the tidal current power generation system, h is the number of hours per year, and η2 is the power generation efficiency of the tidal current power generation system.

Images