Wind, light and water storage integrated power station based on hybrid pumped storage and scheduling method

Abstract

The invention discloses a hybrid pumped storage-based wind-light-water storage integrated power station and a scheduling method, the system comprises a frame structure main body, the bottom of the frame structure main body is provided with a low-position lower water storage tank, and a groove at the top of the frame structure main body is internally provided with a high-position potential energy upper water storage tank; a water suction pump station and a water-turbine generator set are arranged between the low-position lower water storage tank and the high-position potential energy upper water storage tank; the water-turbine generator set comprises a plurality of U-shaped communicating vessel pipelines, the top ends of the U-shaped communicating vessel pipelines are communicated with the high-position potential energy upper water storage pond, the bottom ends of the U-shaped communicating vessel pipelines are communicated to the low-position lower water storage pond, and a plurality of water-turbine generators are fixed to the bottom ends of the U-shaped communicating vessel pipelines. The side surface of the hydraulic ram is connected with a water feeding pipeline, and the other end of the water feeding pipeline communicates with a high-position potential energy upper water storage pond. And the construction difficulty can be effectively reduced, the cost input is reduced, the occupied area is reduced, the constraint of the natural environment is eliminated, the dependence on auxiliary facilities is reduced, flexible layout can be realized according to different regional conditions, and stable operation in the power utilization peak period is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydropower generation, and in particular relates to a wind-solar-water-storage integrated power station based on hybrid pumped storage and a dispatching method. Background Art

[0002] There are two main ways to reduce carbon dioxide emissions. One is carbon sequestration, which is to absorb and store carbon dioxide in the air with the help of natural carbon sinks such as soil, forests, and oceans. In this process, humans can help carbon sequestration by planting trees. The second is carbon offset, which is to reduce carbon dioxide emissions in a certain industry by investing in and developing renewable energy and low-carbon clean technologies, and then offset the emissions of another industry. The calculation unit is based on tons of carbon dioxide equivalent. At a time when global energy demand continues to rise and environmental problems are becoming more severe, the development and utilization of clean energy has become a key issue that needs to be urgently addressed in today's society. As a clean energy source, hydropower has the characteristics of being renewable and pollution-free, and its resources are widely distributed, so its application prospects are very broad.

[0003] Traditional hydropower generation is a common clean energy generation mode with low operating costs. However, this power generation method has many disadvantages. In the dry season, the power generation will be significantly reduced; it depends on water resources such as rivers and lakes, and occupies a large amount of water; it is obviously restricted by complex terrain such as mountainous areas; it is also necessary to build water diversion channels, dams and other facilities, which makes the construction of traditional dams and hydropower stations difficult, extremely costly, wide in area, limited in scope of application, and causes great damage to the ecological environment; in view of this, people have developed new hydropower generation methods such as tidal power generation, wave power generation, and water flow power generation. However, these new methods also face a series of technical bottlenecks. For example, the equipment investment cost is high, the stability is poor during operation, and it is highly dependent on specific geographical environmental conditions. These factors have greatly restricted the large-scale promotion and application of hydropower generation technology. Therefore, it is necessary to design a wind, solar, and water storage integrated power station and dispatching method based on hybrid pumped storage to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a wind, solar and water storage integrated power station and scheduling method based on hybrid pumped storage, which can effectively reduce the construction difficulty, cut cost investment, reduce the floor area, get rid of the constraints of the natural environment, reduce dependence on auxiliary facilities, and can be flexibly arranged according to different geographical conditions to achieve stable operation during peak electricity consumption periods.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is: A wind-solar-hydro-storage integrated power station based on hybrid pumped storage includes a main frame structure. At the bottom of the main frame structure, there is a low-level lower storage pool, and in the groove at the top of the main frame structure, there is a high-level potential upper storage pool; between the low-level lower storage pool and the high-level potential upper storage pool, there is a pumping station and a water turbine generator set; the water turbine generator set includes multiple U-shaped communicating pipe lines. The top of the U-shaped communicating pipe line is connected to the high-level potential upper storage pool, and the bottom is connected to the low-level lower storage pool. At the bottom of the U-shaped communicating pipe line, multiple water turbine generators are fixed; the side surface of the hydraulic ram pump is connected to the water supply pipe line, and the other end of the water supply pipe line is connected to the high-level potential upper storage pool.

[0006] Preferably, the pumping station includes a hydraulic ram pump. The bottom of the hydraulic ram pump is a pump chamber, and the pump chamber is connected to the bottom of the low-level lower storage pool. An outlet valve is arranged on the surface of the pump chamber; the top of the hydraulic ram pump is an air chamber.

[0007] Preferably, the pumping station is electrically connected to an electric energy storage device, and the electric energy storage device is electrically connected to a solar photovoltaic power generation device or a wind power generation device.

[0008] Further, the low-level lower storage pool is used to store circulating water, which is the "raw material" for power generation; the high-level potential upper storage pool is responsible for accumulating the circulating water to make it have gravitational potential energy.

[0009] Further, the function of the pumping station is to pump the circulating water in the low-level lower storage pool to the high-level potential upper storage pool, thereby forming a water level difference and creating conditions for power generation.

[0010] Further, when the circulating water starts from the high-level potential upper storage pool, flows through each water turbine generator set from top to bottom, and finally returns to the low-level lower storage pool, every time it passes through a generator set, it can utilize the kinetic energy of the circulating water for power generation, thus realizing multi-stage power generation.

[0011] Preferably, a pressurizing and supplementary water pipe line is also arranged between the high-level potential upper storage pool and the low-level lower storage pool. After being led out from the high-level potential upper storage pool, the pressurizing and supplementary water pipe line extends vertically downward and is connected to the water inlet of the corresponding water turbine generator set. When the circulating water flows, it enhances and supplements the kinetic energy, thereby improving the power generation efficiency.

[0012] Preferably, a variable-frequency constant-pressure water pump and an electronic pressure regulating valve are installed on the pressurizing and supplementary water pipe line; through these two devices, the water flow rate and water pressure in the pressurizing and supplementary water pipe line can be accurately regulated. In this way, the rotation speed of the water turbine generator set, the water flow rate entering the unit, and the water flow velocity can be effectively controlled.

[0013] Preferably, the variable-frequency constant-pressure water pump and the electronic pressure regulating valve are electrically connected to the electric energy storage device, which provides power support for the stable operation of the entire power generation system. It supplies power to the pumping station and the electronic pressure regulating valve to ensure the normal operation of these devices and guarantee the efficient operation of the entire power generation system.

[0014] Preferably, the U-shaped communicating pipe is one or more paths, and the number of pipelines can be constructed according to the actual situation.

[0015] Furthermore, the water turbine generator set in this system is composed of multiple key components connected in sequence. Among them, the turbine water turbine serves as the starting link and is connected to the inertia flywheel used to maintain a stable rotation speed. After the inertia flywheel, there is a speed increaser, and finally, the speed increaser is connected to the excitation generator.

[0016] Furthermore, regarding the type of turbine water turbine, a tubular hydrogenerator, or a bulb-type through-flow generator, or a Francis hydrogenerator can be selected.

[0017] Furthermore, the building structure type of the main structure is rich. It can be a concrete structure, or a steel structure, or a steel-concrete structure.

[0018] Preferably, a check valve is installed on the upper water pipeline of the pumping station to prevent the reverse flow of water.

[0019] Furthermore, the solar photovoltaic power generation device uses a BIPV building photovoltaic integration device, which is a photovoltaic curtain wall glass array installed on the side wall of the main structure to achieve efficient solar energy collection and conversion; the installation position of the wind power generation device is set at a suitable position near the main structure.

[0020] Preferably, it also includes an energy management system, which monitors and precisely schedules the power generation processes of the solar photovoltaic power generation device or the wind power generation device, the electric energy storage device, and the water turbine generator set.

[0021] Furthermore, according to the grid load demand, it can control the start and stop of the water turbine generator set and the grid connection operation of the unit; through this series of operations, it realizes the comprehensive control of the water circulation power generation system to ensure the stability and reliability of the system operation; at the same time, this system can also promote the coupling and complementarity among wind power generation, solar power generation, and water circulation power generation, provide stable power supply for various devices inside the wind-driven water circulation power generation system, and complete the peak shaving and frequency modulation tasks of the water circulation power generation system.

[0022] Preferably, the scheduling method of the above-mentioned integrated wind-solar-hydro storage power station based on hybrid pumped storage includes the following steps: S1. Set the objective function with the goal of maximizing the net profit of the integrated wind-solar-hydro energy storage power station: ; In the formula, F is the weighted average of the net profits in each scenario, and the weight represents the probability of the occurrence of scenario s; S represents the set of all scenarios s considered in the planning, and NS is denoted as the total number of scenarios; is the construction cost; is the operation and maintenance cost in scenario s; is the income of the integrated power station in the energy market in scenario s; S2. Calculate the construction cost: ; ; In the formula, D represents the set of equipment, where wd represents the wind turbine, pv represents the photovoltaic equipment, ht represents the conventional water turbine, rt represents the pumped storage unit, and ps and es respectively represent the power and capacity of the hydraulic ram pump; The configuration quantities of various power sources are the decision variables of the model, denoted as ; is the unit configuration cost of each equipment; is the capital recovery factor, expressed as: ; In the formula, is the discount rate; is the planning period; S3. Calculate the operation and maintenance cost: ; In the formula, is the unit fixed operation and maintenance cost of each equipment; is the variable operation and maintenance cost per unit energy of the hydraulic ram pump energy storage; is the discharge power of the tUx type power generation equipment at time t in scenario s; represents the charging power of the hydraulic ram pump energy storage at time t in scenario s; is the unit time; S4. The income in the energy market is as follows: In scenario s, the income obtained by the integrated wind-solar-hydro energy storage power station participating in the energy market is as follows: ; In the formula, is the clearing price of the energy market at time t in scenario s; is the selling electricity volume of the integrated power station bundled and sent to the energy market at time t in scenario s; S6. Subsystem modeling: The wind power model is: ; In the formula, is the predicted wind power output of the integrated power station at time t in scenario s; is the average output coefficient of wind power generation in the integrated power station at time t in scenario s, which is obtained by converting the mean value of the actual operation experience data of the built wind power farms in the same region; the output balance constraint of the wind power generation subsystem is: ; In the formula, is the wind power grid-connected power at time t in scenario s; is the wind power curtailment part at time t in scenario s; The photovoltaic model is: ; In the formula, is the predicted photovoltaic output of the integrated power station at time t in scenario s; is the average output coefficient of photovoltaic power generation in the integrated power station at time t in scenario s, which is obtained by calculating the local light resources; The output balance constraint of the photovoltaic power generation subsystem is: ; In the formula, is the photovoltaic grid-connected power at time t in scenario s; is the photovoltaic curtailment part at time t in scenario s; The hybrid pumped storage model is: ; The above formula is the output expression of the conventional water turbine. In the formula is the grid-connected power of the conventional water turbine at time t in scenario s; is the water flow used for power generation by the conventional water turbine at time t in scenario s; is the power generation efficiency of the conventional water turbine; represents the working head of the power station at time t in scenario s, which is obtained from the empirical data of the reservoir; the total output of the conventional water turbine shall not exceed the rated power of the conventional water turbine unit .

[0023] By reasonably configuring the capacities of various power sources in the integrated power station, the regulating functions of energy storage and hydropower can be fully utilized, water and power curtailment can be reduced, and the response ability to power market price signals can be improved, reflecting the advantages of multi-energy complementarity.

[0024] The beneficial effects of the present invention are as follows: 1. The present invention breaks through the limitations of the prior art and constructs a green and environmentally friendly integrated hydropower system. Based on the pumped-storage power station technology, it applies basic physical theories such as the law of conservation of mass, Bernoulli's principle, and the conservation of fluid mechanical energy. With the help of cutting-edge technologies such as artificial intelligence and big data, through innovative designs and intelligent means, it realizes multi-energy complementarity with intermittent new energy (wind power, photovoltaic power), and combines the characteristics of traditional hydropower generation and pumped-storage power generation.

[0025] 2. The present invention improves the power generation efficiency: In the traditional hydropower system, the water flow can only be used for single-time power generation. However, the present invention re-uses the water flow through the principle of communicating vessels, converts the potential energy of the water head multiple times, fully exploits the kinetic energy of the water, and realizes the whole-process hydraulic cycle, greatly improving the hydropower generation efficiency; the present invention reduces the investment cost. It only needs to build the main building, the water circulation system and a small number of auxiliary facilities, and install hydropower generation equipment inside the main body, without building large-scale infrastructure such as dams and diversion channels like traditional hydropower stations. This makes the construction process simple and flexible, with a small floor area and low disaster risk, and realizes power generation without occupying a large amount of land; the present invention reduces the power generation cost: The present invention utilizes the longitudinal space of the building to send the circulating water from the low-level lower storage pool to the high-level upper storage pool with potential energy. One-time water storage can supply multiple generator sets to perform cyclic work for power generation. In contrast, traditional hydropower generation installs generator sets side by side in the horizontal space, and requires a large amount of water source to only drive the water turbine generator to do work once. In addition, the present invention has low maintenance costs, low failure rates, and is not affected by natural factors such as dry seasons in traditional hydropower generation, and can generate electricity stably throughout the year, with broad application prospects and market value.

[0026] 3. The present invention reduces the environmental impact: The present invention does not rely on natural water sources, has no restrictions on site selection, is applicable to areas without rivers, and is more flexible in construction and operation, with a wide range of applications. At the same time, it does not require fuel and cooling water consumption, is a pollution-free and zero-emission environmentally friendly power generation system, with stable and reliable power generation, and contributes to sustainable development.

[0027] 4. The present invention is a wind and light-driven water circulation power generation system that can make full use of water resources for power generation, with the characteristics of small construction difficulty, low cost, small land occupation, not restricted by the natural environment, few auxiliary facilities, and adapting to local conditions, and can realize stable operation throughout the day; this system effectively solves the problems of traditional hydropower generation, overcomes the technical bottlenecks of other hydropower generation methods, is a sustainable, efficient, stable and flexible power generation system, helps to reduce the dependence on traditional energy, reduce greenhouse gas emissions, protect the environment, and promote the realization of the carbon neutral goal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the wind and light-driven water circulation power generation system; Figure 2It is a schematic front view of the blade structure of a water turbine generator set; Figure 3 It is a schematic left view of the blade structure of a water turbine generator set; Figure 4 It is a schematic flow chart of the method according to an embodiment of the present invention; In the figure: the main body of the frame structure 1, the low-level lower storage pool 2, the high-level potential upper storage pool 3, the U-shaped communicating pipe 4, the water turbine generator 5, the hydraulic ram 6, the water supply pipe 7, the pump chamber 8, the air chamber 9, the outlet valve 10, the check valve 11. Detailed implementation manners

[0029] Embodiment 1: As Figures 1 to 3 shown, a wind-solar-hydro-storage integrated power station based on hybrid pumped storage includes the main body of the frame structure 1. A low-level lower storage pool 2 is arranged at the bottom of the main body of the frame structure 1, and a high-level potential upper storage pool 3 is arranged in the groove at the top of the main body of the frame structure 1; a pumping station and a water turbine generator set 5 are arranged between the low-level lower storage pool 2 and the high-level potential upper storage pool 3; the water turbine generator set 5 includes a plurality of U-shaped communicating pipes 4. The top end of the U-shaped communicating pipe 4 is communicated with the high-level potential upper storage pool 3, and the bottom end is communicated to the low-level lower storage pool 2. A plurality of water turbine generators 5 are fixed at the bottom end of the U-shaped communicating pipe 4; the side surface of the hydraulic ram 6 is connected to the water supply pipe 7, and the other end of the water supply pipe 7 is communicated with the high-level potential upper storage pool 3.

[0030] Preferably, the pumping station includes a hydraulic ram 6. The bottom end of the hydraulic ram 6 is a pump chamber 8, and the pump chamber 8 is communicated with the bottom end of the low-level lower storage pool 2. An outlet valve 10 is arranged on the surface of the pump chamber 8; the top end of the hydraulic ram 6 is an air chamber 9.

[0031] Preferably, the pumping station is electrically connected to an electric energy storage device, and the electric energy storage device is electrically connected to a solar photovoltaic power generation device or a wind power generation device.

[0032] Furthermore, the low-level lower storage pool 2 is used to store circulating water, which is the "raw material" for power generation; the high-level potential upper storage pool 3 is responsible for accumulating the circulating water so that it has gravitational potential energy.

[0033] Furthermore, the function of the pumping station is to pump the circulating water in the low-level lower storage pool 2 to the high-level potential upper storage pool 3, thereby forming a water level difference and creating conditions for power generation.

[0034] Furthermore, when the circulating water flows from the high-level potential upper storage pool 3, flows through each water turbine generator set 5 from top to bottom, and finally returns to the low-level lower storage pool 2, during this process, every time it passes through a generator set, it can use the kinetic energy of the circulating water for power generation, thereby realizing multi-stage power generation.

[0035] Preferably, a pressurized make-up water pipeline is also provided between the upper water storage tank 3 with high potential energy and the lower water storage tank 2 with low potential energy. After being led out from the upper water storage tank 3 with high potential energy, the pressurized make-up water pipeline extends vertically downward and is connected to the water inlet of the corresponding water turbine generator set 5. When the circulating water flows, the kinetic energy is enhanced and supplemented, thereby improving the power generation efficiency.

[0036] Preferably, a variable-frequency constant-pressure water pump and an electronic pressure regulating valve are installed on the pressurized make-up water pipeline; through these two devices, the water flow rate and water pressure in the pressurized make-up water pipeline can be accurately regulated. In this way, the rotational speed of the water turbine generator set 5, the water flow rate entering the unit, and the water flow velocity can be effectively controlled.

[0037] Preferably, the variable-frequency constant-pressure water pump and the electronic pressure regulating valve are electrically connected to the electric energy storage device, and the electric energy storage device provides power support for the stable operation of the entire power generation system. It supplies power to the water pumping station and the electronic pressure regulating valve to ensure the normal operation of these devices and guarantee the efficient operation of the entire power generation system.

[0038] Preferably, the U-shaped communicating pipe line 4 is one or more, and the number of pipelines can be constructed according to the actual situation.

[0039] Further, the five groups of water turbine generators in this system are sequentially connected by multiple key components. Among them, the turbine water turbine is the starting link, connected to the inertia flywheel for maintaining a stable rotational speed. After the inertia flywheel, a speed increaser is connected, and finally the speed increaser is connected to the excitation generator.

[0040] Further, regarding the type of the turbine water turbine, a tubular hydroelectric generator, or a bulb-type full-flow generator, or a mixed-flow hydroelectric generator can be selected.

[0041] Further, the building structure type of the structural main body is rich. It can be a concrete structure, or a steel structure, or a steel-concrete structure.

[0042] Preferably, a check valve 11 is installed on the upper water pipeline 7 of the water pumping station to prevent the reverse flow of water.

[0043] Further, the solar photovoltaic power generation device adopts a BIPV building photovoltaic integration device, which is a photovoltaic curtain wall glass array arranged on the side wall of the structural main body to achieve efficient solar energy collection and conversion; the installation position of the wind power generation device is set at a suitable position near the structural main body.

[0044] Preferably, an energy management system is also included, and the energy management system monitors and precisely schedules the power generation processes of the solar photovoltaic power generation device or the wind power generation device, the electric energy storage device, and the five groups of water turbine generators.

[0045] Furthermore, according to the power grid load demand, it can control the startup and shutdown of 5 groups of hydrogenerators, as well as the grid connection operation of the units; through this series of operations, the comprehensive management and control of the water circulation power generation system can be realized to ensure the stability and reliability of the system operation; at the same time, the system can also promote the coupling and complementarity among wind power generation, solar power generation and hydrocyclic power generation, provide stable power supply for various devices inside the wind and light driven water circulation power generation system, and complete the peak shaving and frequency modulation tasks of the water circulation power generation system.

[0046] Embodiment 2: As Figure 4 shown, a dispatching method for a hybrid pumped storage integrated wind-solar-hydro energy storage power station includes the following steps: S1, set the objective function with the goal of maximizing the net profit of the integrated wind-solar-hydro energy storage power station: ; In the formula, F is the weighted average of the net profits in each scenario, and the weight represents the probability of the occurrence of scenario s; S represents the set of all scenarios s considered in the planning, and NS is denoted as the total number of scenarios; is the construction cost; is the operation and maintenance cost in scenario s; is the income of the integrated power station in the energy market in scenario s; S2, calculate the construction cost: ; ; In the formula, D represents the equipment set, where wd represents the wind turbine, pv represents the photovoltaic equipment, ht represents the conventional water turbine, rt represents the pumped storage unit, and ps and es respectively represent the power and capacity of the hydraulic ram pump; The configuration quantities of various power sources are the decision variables of the model, denoted as ; is the unit configuration cost of each equipment; is the capital recovery factor, expressed as: ; In the formula, is the discount rate; is the planning period; S3, calculate the operation and maintenance cost: ; In the formula, is the unit fixed operation and maintenance cost of each equipment; is the variable operation and maintenance cost per unit energy of the hydraulic ram pump energy storage; The discharge power of the Ux-type power generation equipment at time t in scenario s; Indicates the charging power of the hydraulic ram pump energy storage at time t in scenario s; Is the unit time; S4, the energy market income is as follows: The income obtained by the integrated wind-solar-hydro-storage power station participating in the energy market under scenario s Is as follows: ; In the formula, Is the clearing price of the energy market at time t in scenario s; Is the electricity sold by the integrated power station bundled and sent to the energy market at time t in scenario s; S6, modeling the subsystems: The wind power model is: ; In the formula, Is the predicted wind power output of the integrated power station at time t in scenario s; Is the average output coefficient of wind power generation in the integrated power station at time t in scenario s, which is obtained by converting the average value of the actual operation experience data of the built wind power generation stations in the same area; the output balance constraint of the wind power generation subsystem is: ; In the formula, Is the wind power grid-connected electricity at time t in scenario s; Is the wind power abandoned part at time t in scenario s; The PV model is: ; In the formula, Is the predicted PV output of the integrated power station at time t in scenario s; Is the average output coefficient of PV power generation in the integrated power station at time t in scenario s, which is obtained by calculating the local light resources; The output balance constraint of the PV power generation subsystem is: ; In the formula, Is the PV grid-connected electricity at time t in scenario s; Is the PV abandoned part at time t in scenario s; The hybrid pumped storage model is: ; The above formula is the output expression of the conventional water turbine. In the formula Is the grid-connected electricity of the conventional water turbine at time t in scenario s; Is the water flow used for power generation by the conventional water turbine at time t in scenario s; is the power generation efficiency of a conventional water turbine; represents the working head of the power station at time t in scenario s, obtained from the empirical data of the reservoir; the total output of the conventional water turbine shall not exceed the rated power of the conventional water turbine unit .

[0047] Through the reasonable allocation of the capacity of various power sources in the integrated power station, the regulating roles of energy storage and hydropower can be fully exerted, water and electricity waste can be reduced, and the response ability to power market price signals can be improved, reflecting the advantages of multi-energy complementarity.

Claims

1. A wind-solar-hydro-storage integrated power station based on hybrid pumped-storage energy storage, characterized in that It includes a frame structure main body, with a low-position lower water storage pool arranged at the bottom of the frame structure main body, and a high-position potential upper water storage pool arranged in the groove at the top of the frame structure main body; a pumping station and a water turbine generator set are arranged between the low-position lower water storage pool and the high-position potential upper water storage pool; the water turbine generator set includes multiple U-shaped communicating pipe lines, the top ends of the U-shaped communicating pipe lines are communicated with the high-position potential upper water storage pool, the bottom ends are communicated to the low-position lower water storage pool, and multiple water turbine generators are fixed at the bottom ends of the U-shaped communicating pipe lines; the side surface of the hydraulic ram pump is connected with an upper water pipe, and the other end of the upper water pipe is communicated with the high-position potential upper water storage pool.

2. The integrated wind-solar-hydro energy storage power station based on hybrid pumped storage according to claim 1, wherein The pumping station includes a hydraulic ram pump, the bottom end of the hydraulic ram pump is a pump chamber, the pump chamber is communicated with the bottom end of the low-position lower water storage pool, and a water outlet valve is arranged on the surface of the pump chamber; the top end of the hydraulic ram pump is an air chamber.

3. A wind-solar-hydro-storage integrated power station based on hybrid pumped storage according to claim 1, wherein The pumping station is electrically connected to an electric energy storage device, and the electric energy storage device is electrically connected to a solar photovoltaic power generation device or a wind power generation device.

4. A wind-solar-hydro-storage integrated power station based on hybrid pumped storage according to claim 1, characterized in that A pressurizing and make-up water pipe line is also arranged between the high-position potential upper water storage pool and the low-position lower water storage pool. After being led out from the high-position potential upper water storage pool, the pressurizing and make-up water pipe line extends vertically downward and is connected to the water inlet of the corresponding water turbine generator set.

5. A wind-solar-hydro-storage integrated power station based on hybrid pumped storage according to claim 4, wherein, A variable-frequency constant-pressure water pump and an electronic pressure regulating valve are installed on the pressurizing and make-up water pipe line.

6. The integrated wind-solar-hydro energy storage power station based on hybrid pumped storage according to claim 5, wherein, The variable-frequency constant-pressure water pump and the electronic pressure regulating valve are electrically connected to the electric energy storage device.

7. A wind-solar-hydro-storage integrated power station based on hybrid pumped storage according to claim 1, characterized in that The U-shaped communicating pipe line is one or more paths, and the number of pipelines can be constructed according to the actual situation.

8. A wind-solar-hydro energy storage integrated power station based on hybrid pumped storage according to claim 1, characterized in that, A check valve is installed on the upper water pipe of the pumping station.

9. The integrated wind-solar-hydro energy storage power station based on hybrid pumped storage according to claim 1, characterized in that, It also includes an energy management system, which monitors and precisely schedules the power generation processes of the solar photovoltaic power generation device or the wind power generation device, the electric energy storage device, and the water turbine generator set.

10. A scheduling method for a wind-solar-hydro-storage integrated power station based on hybrid pumped storage, as claimed in claim 9, wherein It includes the following steps: S1, set the objective function with the goal of maximizing the net profit of the integrated wind-solar-hydro-storage multi-energy complementary power station: ； Wherein, F is the weighted average of the net profits in each scenario, and the weight represents the probability of the occurrence of scenario s; S represents the set of all scenarios s considered in the plan, and NS is denoted as the total number of scenarios; is the construction cost; is the operation and maintenance cost in scenario s; is the income of the integrated power station in the energy market in scenario s; S2, calculate the construction cost: ； ； In the formula, D represents the equipment set, where wd represents the wind turbine, pv represents the photovoltaic equipment, ht represents the conventional water turbine, rt represents the pumped storage unit, and ps and es respectively represent the power and capacity of the hydraulic ram pump; The configured amounts of various power supplies are decision variables of the model, denoted as ; is the unit configuration cost of each device; is the capital recovery factor, expressed as: ； In the formula, is the discount rate; is the planning period; S3, calculate the operation and maintenance cost: ； Wherein, is the unit fixed operation and maintenance cost of each device; is the variable operation and maintenance cost per unit energy of the hydraulic ram pump energy storage; is the discharge power of the tUx type power generation device at time t in scenario s; represents the charging power of the hydraulic ram pump energy storage at time t in scenario s; is the unit time; S4, the energy market income is as follows: Income obtained by the integrated wind, light, water and energy storage power station participating in the energy market under scenario s As follows: ； In the formula, is the clearing price of the energy market at time t in scenario s; is the electricity quantity sold by the integrated power station bundled and sent to the energy market at time t in scenario s. S6, model the subsystems: The wind power model is: ； Wherein, is the predicted wind power output of the integrated power station at time t in scenario s; is the average output coefficient of wind power generation in the integrated power station at time t in scenario s, which is obtained by converting the mean value of the actual operation experience data of the built wind power generation stations in the same region; the output balance constraint of the wind power generation subsystem is: ； Wherein, is the on-grid wind power at time t in scenario s; is the curtailed wind power part at time t in scenario s; The photovoltaic model is: ； In the formula, is the predicted PV output of the integrated power station at time t in scenario s; is the average output coefficient of PV power generation in the integrated power station at time t in scenario s, which is obtained by calculating the local light resources; The output balance constraint of the photovoltaic power generation subsystem is: ； In the formula, is the photovoltaic grid-connected power at time t in scenario s; is the photovoltaic curtailed power part at time t in scenario s; The hybrid pumped storage model is: ； The above formula is the output expression of a conventional water turbine. In the formula, is the grid-connected power of the conventional water turbine at time t in scenario s; is the water flow used for power generation by the conventional water turbine at time t in scenario s; is the power generation efficiency of the conventional water turbine; represents the working head of the power station at time t in scenario s, which is obtained from the empirical data of the reservoir; the total output of the conventional water turbine shall not exceed the rated power of the conventional water turbine unit .

Images