A hydroelectric power plant drainage system and method

Abstract

The application relates to a hydropower station drainage system and method, a dual-source power supply framework of a distributed new energy power supply module and a station service power supply module is constructed through an intelligent power distribution module, real-time sensing and decision-making of power supply output of the distributed new energy power supply module are performed by relying on a system control module, intelligent switching of a power supply loop is realized, redundant power supply guarantee is provided for the hydropower station drainage system, station service is taken as a basis to guarantee a power source, distributed new energy is taken as a priority power supply source, continuous energy consumption loss and power supply interruption risk under a single station service power supply mode are avoided, in-situ consumption of dam area distributed clean energy is realized, and continuous and stable operation requirements of a drainage system in multiple scenes such as hydropower station workshop leakage, dam leakage, unit maintenance and plant drainage are comprehensively adapted.

Description

Technical Field

[0001] This application relates to the field of water conservancy and hydropower engineering, specifically to a drainage system and method for a hydropower station. Background Technology

[0002] Currently, as the core carrier of clean and renewable energy, the safe and stable operation and energy conservation of large-scale hydropower stations have become the core focus of the hydropower industry. The powerhouse drainage system, generator maintenance drainage system, dam drainage system, and power plant pump drainage system are key systems for ensuring the structural safety of the dam, the normal operation of powerhouse equipment, and the smooth implementation of generator maintenance. These systems must have 24-hour uninterrupted and highly reliable operation capabilities. The industry has a continuous and urgent overall demand for low-energy operation, increased power supply redundancy, and efficient energy utilization in such systems.

[0003] In related technologies, various drainage systems of large hydropower stations use the power plant's auxiliary power as the core or even the only power source. By configuring electric motors that match the drainage load to drive drainage pump sets, and matching them with corresponding power control cabinets, the system achieves linkage drainage control based on the water level in the sump. This allows water bodies such as seepage water and maintenance water in the sump to be directly pumped to the downstream river channel of the power station dam, thereby meeting the drainage needs of various scenarios in hydropower stations.

[0004] However, the drainage system relies entirely on the power plant's auxiliary power supply. In scenarios such as underground power plants with large drainage volumes and high pumping frequencies, this results in extremely high energy consumption of auxiliary power. When the auxiliary power system is shut down for maintenance or when line faults occur, the drainage pump sets will also stop, directly reducing the number of available drainage pumps and the backup capacity of the drainage system. This seriously affects the operating efficiency and safety and reliability of the drainage system, and may even pose safety hazards to the power plant dam and building structure. Summary of the Invention

[0005] This application provides a drainage system and method for a hydropower station, which can solve the technical problems in the related art, such as high energy consumption of plant power supply and insufficient power supply redundancy caused by the reliance on a single plant power supply, as well as insufficient operating efficiency and safety reliability of the drainage system caused by the shutdown of drainage pump sets during plant power failure or maintenance.

[0006] In a first aspect, embodiments of this application provide a hydropower station drainage system, which includes: The intelligent power distribution module has a power input terminal that is electrically connected to a distributed new energy power supply module and a plant power supply module, and a power output terminal that is electrically connected to a drainage pump control module. The system control module is connected to the distributed new energy power supply module, the intelligent power distribution module and the drainage pump control module respectively, and is used to collect the power output data of the distributed new energy power supply module and send power switching instructions to the intelligent power distribution module according to the power output data. The intelligent power distribution module is used to select one of the power supply circuits between the distributed new energy power supply module or the plant power supply module and the drainage pump control module according to the power switching command.

[0007] In conjunction with the first aspect, in one embodiment, the system control module is further configured to collect liquid level data of the corresponding water collection well of the drainage system; The drainage pump control module is electrically connected to a drainage pump set. The outlet of the drainage pump set can be selectively connected to the upstream reservoir or the downstream river of the hydropower station dam. The drainage pump control module is used to drive the drainage pump set to pump the water in the collection well to the upstream reservoir or the downstream river based on the liquid level data.

[0008] In conjunction with the first aspect, in one embodiment, the distributed new energy power supply module includes at least one set of distributed power generation units, wherein the distributed power generation units include at least one of photovoltaic arrays and distributed wind power units.

[0009] In conjunction with the first aspect, in one embodiment, the distributed new energy power supply module is equipped with multiple parallel intelligent combiner units. The intelligent combiner units are used to collect the electrical energy of each of the distributed power generation units and can output power supply capacity adapted to different operating conditions of the drainage system, matching the energy supply characteristics of the dam area.

[0010] In conjunction with the first aspect, in one embodiment, the distributed generation unit is equipped with an installation bracket, which is fixed to the existing foundation surface of the existing site in the hydropower station dam area. The distributed generation unit is installed on the roof of the dam area building and the reservoir bank slope through the installation bracket.

[0011] In conjunction with the first aspect, in one embodiment, the system control module is further configured to collect real-time operating status data of the drainage pump group, and the intelligent power distribution module is configured to execute the power switching command to complete the switching of the power supply circuit when the drainage pump group is in a shutdown state.

[0012] Secondly, embodiments of this application provide a control method for the hydropower station drainage system described in some of the above embodiments, which includes the following steps: Real-time acquisition of power output data from distributed new energy power supply modules; Based on the collected power output data, determine whether the power supply capacity of the distributed new energy power supply module meets the current operating load requirements of the drainage system. If the power supply demand is met, the first switching command is sent to the intelligent power distribution module, and the power supply circuit between the distributed new energy power supply module and the drainage pump control module is connected through the intelligent power distribution module. If the power supply demand is not met, a second switching command is issued to the intelligent power distribution module, which then connects the power supply circuit between the plant power supply module and the drainage pump control module.

[0013] In conjunction with the second aspect, one implementation also includes the following steps: Real-time collection of liquid level data of the corresponding water collection well of the drainage system; generation of drainage control command based on the liquid level data and sending it to the drainage pump control module to drive the drainage pump group to perform drainage operation; When the power supply circuit of the distributed new energy power supply module is turned on, the control drainage pump group will pump the water in the collection well to the upstream reservoir of the hydropower station dam. When the power supply circuit of the plant power supply module is turned on, the control drainage pump group pumps the water in the collection well to the downstream river channel of the hydropower station dam.

[0014] In conjunction with the second aspect, one implementation also includes the following steps: After the power switching command is issued, the real-time operating status of the drainage pump group is collected first. Only when the drainage pump group is in a stopped state is the intelligent power distribution module controlled to perform the corresponding power switching operation.

[0015] In conjunction with the second aspect, one implementation also includes the following steps: The system monitors the liquid level change trend of the corresponding collection well in the drainage system in real time. When the liquid level change trend exceeds the preset threshold, the power supply circuit between the plant power supply module and the drainage pump control module is activated to ensure the continuous and stable operation of the drainage operation.

[0016] The beneficial effects of the technical solutions provided in this application include: By constructing a dual-source power supply architecture of distributed new energy power supply module and plant power supply module through intelligent power distribution module, and relying on system control module to perceive and make decisions on the power output of distributed new energy power supply module in real time, intelligent switching of power supply circuit is realized, providing redundant power supply guarantee for hydropower station drainage system. With plant power as the basic backup power source and distributed new energy as the priority power source, the continuous energy consumption loss and power outage risk of the single power supply mode of plant power are avoided, realizing the local consumption of distributed clean energy in dam area, and fully adapting to the continuous and stable operation requirements of drainage system in multiple scenarios such as hydropower plant leakage, dam leakage, unit maintenance, and plant area drainage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural block diagram of a hydropower station drainage system provided in an embodiment of this application; Figure 2 This is a flowchart illustrating the control method for a hydropower station drainage system provided in an embodiment of this application. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0020] This application provides a drainage system and method for a hydropower station, which can solve the technical problems in the related art, such as high energy consumption of plant power supply and insufficient power supply redundancy caused by the reliance on a single plant power supply, as well as insufficient operating efficiency and safety reliability of the drainage system caused by the shutdown of drainage pump sets during plant power failure or maintenance.

[0021] Firstly, such as Figure 1 As shown in the figure, this application embodiment provides a hydropower station drainage system, which includes: an intelligent power distribution module, whose power input terminal is electrically connected to a distributed new energy power supply module and a plant power supply module, and whose power output terminal is electrically connected to a drainage pump control module; a system control module, which is signal-connected to the distributed new energy power supply module, the intelligent power distribution module and the drainage pump control module respectively, and is used to collect the power output data of the distributed new energy power supply module, and issue a power switching command to the intelligent power distribution module according to the power output data; the intelligent power distribution module is used to select one of the power supply circuits between the distributed new energy power supply module or the plant power supply module and the drainage pump control module according to the power switching command.

[0022] In this embodiment, a dual-source power supply architecture of distributed new energy power supply module and plant power supply module is constructed through intelligent power distribution module. The power output of distributed new energy power supply module is perceived and decided in real time by system control module to realize intelligent switching of power supply circuit, providing redundant power supply guarantee for hydropower station drainage system. Plant power is the basic backup power source, and distributed new energy is the priority power source. This avoids the continuous energy loss and power interruption risk of single power supply mode of plant power, realizes the local consumption of distributed clean energy in dam area, and fully adapts to the continuous and stable operation requirements of drainage system in multiple scenarios such as hydropower plant leakage, dam leakage, unit maintenance, and plant area drainage.

[0023] In conjunction with the first aspect, in one embodiment, the system control module is further configured to collect liquid level data of the corresponding collection well of the drainage system; the drainage pump control module is electrically connected to a drainage pump set, the outlet of which can be selectively connected to the upstream reservoir or downstream river of the hydropower station dam; the drainage pump control module is configured to drive the drainage pump set to pump water from the collection well to the upstream reservoir or downstream river according to the liquid level data.

[0024] In this embodiment, the system control module collects the water level of the collection well in real time, constructs a closed-loop control logic for sensing the water inflow trend of the collection well and adjusting the operation of the drainage pump group, and realizes the precise adaptation of the operation status of the drainage pump group with the water inflow of the collection well, ensuring the stable realization of the basic pumping function of the drainage system; at the same time, through the bidirectional path design of the water outlet of the drainage pump group, combined with the switching status of the power supply circuit to adjust the drainage direction, the electrical energy provided by the distributed new energy power supply module can be converted into the gravitational potential energy of the reservoir water body, forming a "new energy + drainage" pumped storage mode adapted to the hydropower station scenario, avoiding the energy loss problem of the traditional drainage system directly pumping water to the downstream river channel, and greatly improving the comprehensive utilization efficiency of new energy in the dam area.

[0025] In conjunction with the first aspect, in one embodiment, the distributed new energy power supply module includes at least one set of distributed power generation units, wherein the distributed power generation units include at least one of photovoltaic arrays and distributed wind power units.

[0026] In this embodiment, by modularly designing the core power generation unit of the distributed new energy power supply module, it can flexibly adapt to various clean energy resources that can be developed and utilized in the hydropower station dam area. Among them, the photovoltaic array can make full use of the abundant sunlight resources in the dam area, and the distributed wind power unit can adapt to the wind energy resources in open areas such as the reservoir bank and dam crest of the dam area, realizing the energy development of idle space in the dam area. At the same time, the modular design can flexibly adjust the configuration quantity and type of power generation units according to the resource conditions and drainage load requirements of the dam area, improving the system's adaptability to different dam area terrains and climate conditions.

[0027] In conjunction with the first aspect, in one embodiment, the distributed new energy power supply module is equipped with multiple parallel intelligent combiner units. The intelligent combiner units are used to collect the electrical energy of each of the distributed power generation units and can output power supply capacity adapted to different operating conditions of the drainage system, matching the energy supply characteristics of the dam area.

[0028] In this embodiment, the power of each distributed generation unit is collected and integrated by a multi-parallel intelligent combiner unit. This can adapt to the characteristics of the output of the distributed generation unit fluctuating with natural conditions, smooth the power output curve, and output the corresponding matching power supply capacity according to the load demand of different operating conditions of the drainage system. This meets the differentiated power supply needs of the drainage system for 24-hour data collection, low-load continuous operation and short-term high-power maintenance drainage operations, improves the collection efficiency and utilization efficiency of distributed energy, and adapts to the dynamic changes in energy supply such as sunshine and wind power in the dam area.

[0029] In conjunction with the first aspect, in one embodiment, the distributed generation unit is equipped with an installation bracket, which is fixed to the existing foundation surface of the existing site in the hydropower station dam area. The distributed generation unit is installed on the roof of the dam area building and the reservoir bank slope through the installation bracket.

[0030] In this embodiment, the distributed power generation unit is fixed on the existing foundation of the existing site in the dam area by the installation bracket, without the need for additional construction land, realizing the reuse of dam area space and functional superposition; at the same time, the installation structure set in different areas can be adapted to the installation needs of different terrains such as dam area building roofs and reservoir bank slopes. The array layout of the power generation unit can be consistent with the planning and construction of the dam area camp. During the construction process, the disturbance to the dam area soil can be reduced, the risk of soil erosion can be reduced, and the functional compatibility of the power generation facility with the existing facilities in the dam area can be achieved, completing the adaptation from physical superposition to organic integration.

[0031] In conjunction with the first aspect, in one embodiment, the system control module is further configured to collect real-time operating status data of the drainage pump group, and the intelligent power distribution module is configured to execute the power switching command to complete the switching of the power supply circuit when the drainage pump group is in a shutdown state.

[0032] In this embodiment, the real-time acquisition of the operating status of the drainage pump group by the system control module provides a safe basis for the switching of the power supply circuit. The power switching operation is only performed when the drainage pump group is in a stopped state, which can avoid equipment impact, electrical faults, contact erosion and other problems caused by switching under load, and ensure the safety and stability of the power supply switching process. At the same time, it avoids interference with the operation of the drainage pump group during the switching process, and ensures the continuous and reliable operation of the drainage system.

[0033] In conjunction with the first aspect, in one embodiment, the distributed new energy power supply module further includes an energy storage unit and a water conservancy-specific inverter unit. The charging and discharging terminals of the energy storage unit are electrically connected to the intelligent combiner unit, the input terminal of the water conservancy-specific inverter unit is electrically connected to the intelligent combiner unit, and the output terminal is electrically connected to the intelligent power distribution module.

[0034] In this embodiment, the energy storage unit can store the surplus power generated by the distributed generation unit, which can supplement the power output when natural conditions such as insufficient sunlight and wind power are insufficient or the output of the generation unit decreases, thus extending the duration of new energy power supply and adapting to the power supply needs of scenarios such as continuous rain and night. The water conservancy-specific inverter unit can adapt to the humid, dusty, and electromagnetically interfered operating environment of the hydropower station dam area, converting the DC power output from the generation unit and the energy storage unit into AC power suitable for drainage system equipment, thereby improving the environmental adaptability and operational stability of the power supply system.

[0035] In conjunction with the first aspect, in one embodiment, the drainage pump control module is provided with multiple sets corresponding to the drainage pump group, respectively corresponding to the powerhouse leakage drainage system, the unit maintenance drainage system, the dam leakage drainage system, and the plant area pump drainage system of the hydropower station. The system control module can issue independent power switching commands to each set of intelligent power distribution modules.

[0036] In this embodiment, through modular multi-group configurations, the differentiated operational needs of drainage systems in different scenarios of hydropower stations can be adapted. For powerhouse leakage and dam leakage drainage systems that require continuous low-load operation for 24 hours, the use of distributed new energy power supply can be maximized to reduce continuous operation energy consumption. For unit maintenance drainage systems that require short-term high-power power supply, the power supply modes of new energy and plant power can be flexibly matched to ensure the efficient completion of maintenance operations and realize the energy-saving and high-reliability transformation of drainage systems in all scenarios.

[0037] In conjunction with the first aspect, in one embodiment, the photovoltaic array of the distributed power generation unit adopts a high-efficiency anti-reverse component with an anti-corrosion coating, and the mounting bracket and supporting electrical lines are all equipped with grounding lightning protection units, which are electrically connected to the existing grounding grid of the dam area.

[0038] In this embodiment, the photovoltaic modules with anti-corrosion coating can adapt to the corrosive environment of high humidity and water mist in the hydropower station dam area, extending the service life of the modules; through the grounding lightning protection unit connected to the existing grounding grid in the dam area, damage to the power generation equipment caused by lightning strikes and electrostatic induction in the open area of ​​the dam area can be effectively avoided, improving the lightning protection capability and operational safety of the system, while the existing grounding facilities in the dam area can be reused, reducing the system transformation cost.

[0039] In conjunction with the first aspect, in one implementation, the installation of the distributed power generation unit adopts a zoned construction and cross-operation mode, and the functional testing of the drainage system is carried out simultaneously during the construction process to ensure that the drainage capacity of the drainage system is not affected during the construction process.

[0040] In this embodiment, the phased construction mode can avoid interference with the normal operation of the dam camp and power plant. The synchronous testing of the drainage system function during construction can ensure the continuous and reliable operation of the power plant drainage system during construction, avoid drainage safety risks caused by construction. At the same time, the key links of waterproofing and sealing, grounding and lightning protection during the installation of supports and pipeline laying are strictly controlled to ensure the construction quality and long-term operational stability of the system.

[0041] Secondly, embodiments of this application provide a control method based on a hydropower station drainage system as described in some of the above embodiments, which includes the following steps: S100: Real-time acquisition of power output data from distributed new energy power supply modules; S200: Based on the collected power output data, determine whether the power supply capacity of the distributed new energy power supply module meets the current operating load requirements of the drainage system. S300: If the power supply demand is met, the first switching command is sent to the intelligent power distribution module, and the power supply circuit between the distributed new energy power supply module and the drainage pump control module is connected through the intelligent power distribution module. S400: If the power supply demand is not met, a second switching command is issued to the intelligent power distribution module to connect the power supply circuit between the plant power supply module and the drainage pump control module.

[0042] In this embodiment, by collecting and dynamically judging the power output of the distributed new energy power supply module in real time, a power supply control logic of "new energy priority and plant power as a backup" is constructed. This maximizes the utilization of distributed clean energy in the dam area, reduces the drainage system's dependence on plant power, reduces plant power energy consumption, and helps achieve dual carbon goals. At the same time, through intelligent switching between the two power sources, a continuous and stable power supply guarantee is provided for the drainage system, avoiding the risk of drainage pump group shutdown and drainage system operation interruption when plant power is under maintenance or malfunctioning, thereby improving the operating efficiency and safety reliability of the drainage system.

[0043] In conjunction with the second aspect, in one embodiment, the method further includes S500, which includes the following steps: S501: Real-time acquisition of liquid level data of the corresponding water collection well of the drainage system, generation of drainage control command based on the liquid level data and sending it to the drainage pump control module to drive the drainage pump group to perform drainage operation; S502: When the power supply circuit of the distributed new energy power supply module is turned on, the drainage pump group is controlled to pump the water in the collection well to the upstream reservoir of the hydropower station dam. S503: When the power supply circuit of the plant power supply module is turned on, the drainage pump group is controlled to pump the water in the collection well to the downstream river channel of the hydropower station dam.

[0044] In this embodiment, by real-time acquisition and closed-loop control of the water level in the collection well, the drainage pump group can be precisely started, stopped, and its operation adjusted to ensure reliable drainage of seepage water and maintenance water in the plant, dam, and other areas. At the same time, the drainage destination is linked to the power supply type. When powered by new energy sources, the water is pumped to the upstream reservoir of the dam, converting the surplus new energy power into the gravitational potential energy of the water, realizing the cross-time storage and utilization of new energy. When powered by plant power, the water is directly pumped to the downstream river, ensuring the efficient completion of drainage operations under extreme conditions and constructing a dual-guarantee operation mode of "safe operation and maintenance + energy saving and consumption reduction".

[0045] In conjunction with the second aspect, one implementation also includes the following steps: S600: After issuing a power switching command, it first collects the real-time operating status of the drainage pump group. Only when the drainage pump group is in a stopped state will it control the intelligent power distribution module to perform the corresponding power switching operation. In this embodiment, before performing the power switching operation, the operating status of the drainage pump group is first checked for safety. The power supply circuit is switched only when the drainage pump group is in a stopped state. This can effectively avoid the risks of electrical component damage and power supply circuit short circuit caused by switching under load, extend the service life of the equipment, and at the same time avoid abnormal start and stop of the drainage pump group during the switching process, ensuring the continuity and stability of drainage operations.

[0046] In conjunction with the second aspect, one implementation also includes the following steps: S700: Real-time monitoring of the liquid level change trend of the corresponding collection well in the drainage system. When the liquid level change trend exceeds the preset threshold, the power supply circuit between the plant power supply module and the drainage pump control module is activated to ensure the continuous and stable operation of the drainage operation.

[0047] In this embodiment, by monitoring the trend of water level changes in the collection well in real time, extreme drainage conditions such as heavy rain and sudden increase in seepage water can be predicted in advance. When the water level change exceeds the preset threshold, the power supply circuit of the plant power supply is switched first to ensure that the drainage pump group can obtain a continuous and stable high-power power supply, quickly reduce the water level in the collection well, avoid damage to plant equipment and impact on the safety of dam structure caused by water overflow, and greatly improve the emergency response capability and operational reliability of the drainage system under extreme conditions.

[0048] In conjunction with the second aspect, one implementation also includes system debugging and strategy optimization steps, specifically including: S000: Complete the grid connection commissioning of distributed new energy power supply modules, charge and discharge tests of energy storage units, and verification of the linkage control function of dual power supply switching in stages. Simulate extreme scenarios such as rainstorms, continuous rain, and sudden increase in water inflow to verify the emergency response capability of the system. Optimize the preset strategies of power switching and drainage control based on trial operation data.

[0049] In this embodiment, potential risks to system operation can be identified in advance through phased debugging and extreme scenario simulation verification, ensuring stable operation of the system under various working conditions. At the same time, through continuous optimization of trial operation data, the utilization efficiency of new energy sources and the operational stability of the drainage system can be further improved, providing replicable implementation experience for the energy-saving and high-reliability transformation of drainage systems in similar hydropower stations.

[0050] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0051] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A drainage system for a hydropower station, characterized in that, It includes: The intelligent power distribution module has a power input terminal that is electrically connected to a distributed new energy power supply module and a plant power supply module, and a power output terminal that is electrically connected to a drainage pump control module. The system control module is connected to the distributed new energy power supply module, the intelligent power distribution module and the drainage pump control module respectively, and is used to collect the power output data of the distributed new energy power supply module and send power switching instructions to the intelligent power distribution module according to the power output data. The intelligent power distribution module is used to select one of the power supply circuits between the distributed new energy power supply module or the plant power supply module and the drainage pump control module according to the power switching command.

2. The hydropower station drainage system as described in claim 1, characterized in that, The system control module is also used to collect liquid level data of the corresponding water collection wells in the drainage system; The drainage pump control module is electrically connected to a drainage pump set. The outlet of the drainage pump set can be selectively connected to the upstream reservoir or the downstream river of the hydropower station dam. The drainage pump control module is used to drive the drainage pump set to pump the water in the collection well to the upstream reservoir or the downstream river based on the liquid level data.

3. The hydropower station drainage system as described in claim 1, characterized in that, The distributed new energy power supply module includes at least one set of distributed power generation units, and the distributed power generation units include at least one of photovoltaic arrays and distributed wind power units.

4. The hydropower station drainage system as described in claim 3, characterized in that, The distributed new energy power supply module is equipped with multiple parallel intelligent combiner units. The intelligent combiner units are used to collect the electrical energy of each distributed power generation unit and can output power supply capacity that is adapted to different operating conditions of the drainage system, matching the energy supply characteristics of the dam area.

5. The hydropower station drainage system as described in claim 3, characterized in that, The distributed generation unit is equipped with an installation bracket, which is fixed to the existing foundation surface of the existing site in the hydropower station dam area. The distributed generation unit is installed on the roof of the dam area building and the reservoir bank slope through the installation bracket.

6. The hydropower station drainage system as described in claim 1, characterized in that, The system control module is also used to collect real-time operating status data of the drainage pump group, and the intelligent power distribution module is used to execute the power switching command to complete the switching of the power supply circuit when the drainage pump group is in a stopped state.

7. A control method based on the drainage system of a hydropower station as described in any one of claims 1-6, characterized in that, It includes the following steps: Real-time acquisition of power output data from distributed new energy power supply modules; Based on the collected power output data, determine whether the power supply capacity of the distributed new energy power supply module meets the current operating load requirements of the drainage system. If the power supply demand is met, the first switching command is sent to the intelligent power distribution module, and the power supply circuit between the distributed new energy power supply module and the drainage pump control module is connected through the intelligent power distribution module. If the power supply demand is not met, a second switching command is issued to the intelligent power distribution module, which then connects the power supply circuit between the plant power supply module and the drainage pump control module.

8. The control method for the drainage system of a hydropower station as described in claim 7, characterized in that, It also includes the following steps: Real-time collection of liquid level data of the corresponding water collection well of the drainage system; generation of drainage control command based on the liquid level data and sending it to the drainage pump control module to drive the drainage pump group to perform drainage operation; When the power supply circuit of the distributed new energy power supply module is turned on, the control drainage pump group will pump the water in the collection well to the upstream reservoir of the hydropower station dam. When the power supply circuit of the plant power supply module is turned on, the control drainage pump group pumps the water in the collection well to the downstream river channel of the hydropower station dam.

9. The control method for the drainage system of a hydropower station as described in claim 7, characterized in that, It also includes the following steps: After the power switching command is issued, the real-time operating status of the drainage pump group is collected first. Only when the drainage pump group is in a stopped state is the intelligent power distribution module controlled to perform the corresponding power switching operation.

10. The control method for the drainage system of a hydropower station as described in claim 7, characterized in that, It also includes the following steps: The system monitors the liquid level change trend of the corresponding collection well in the drainage system in real time. When the liquid level change trend exceeds the preset threshold, the power supply circuit between the plant power supply module and the drainage pump control module is activated to ensure the continuous and stable operation of the drainage operation.

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