Design method for preventing underground machine room of hydropower station from being flooded

Abstract

The invention relates to the technical field of underground machine room anti-flooding design, aims to solve the problem of lack of targeted waterproof design for machine rooms according to water inflow conditions in the prior art, and provides a design method for preventing a hydropower station underground machine room from being flooded, which comprises the steps of arranging an environment monitoring system, a drying system, a self-adaptive drainage system and a permanent water inflow prevention barrier, the environment monitoring system, the drying system, the self-adaptive drainage system and the permanent water inflow prevention barrier are all connected to the control system, the environment monitoring system transmits collected information to the control system, the control system analyzes and processes the information, the category of the water inflow condition of the machine room is judged, and the water inflow condition is monitored. Controlling to start a drying system, a self-adaptive drainage system or a permanent anti-inflow barrier according to the category of the water inflow condition of the machine room; according to the method, the water inflow conditions of the underground machine room are classified, different protection measures are designed for the water inflow conditions of different types of machine rooms, powerful guarantee can be provided for preventing the underground machine room of the underground hydropower station from being flooded and damaged, and the reconstruction cost of the machine room is saved.

Description

Technical Field

[0001] The invention relates to the technical field of flood prevention design for underground machine rooms, and in particular to a design method for preventing an underground machine room of a hydropower station from being flooded. Background Art

[0002] The machine room of the underground hydropower station is placed in a specific room in the underground plant. The precision equipment in the machine room undertakes the core tasks of the hydropower station, such as data collection, equipment communication and control, power production, flood control and safety protection. The stability and safety of the underground machine room is a strong guarantee for the digital operation and unmanned operation of the underground hydropower station. However, in recent years, underground hydropower station flooding incidents have occurred from time to time. When the rainy season comes, rainwater leaks into the plant with the mountain, and when the upstream dam breaks, there may be varying degrees of water flowing into the underground plant.

[0003] As the core area of ​​underground hydropower stations, underground machine rooms are facing increasingly severe flooding situations. Existing technologies have achieved comprehensive monitoring and early warning of flooded plants. When water enters the underground plant due to failure of pipeline equipment such as turbine generator sets, the unit entry door can be closed in time, the unit can be shut down quickly, and the impact of water inflow can be reduced. However, the waterproof design of the machine room is insufficient. As the core area of ​​the power station, the machine room does not have complete and strict waterproof measures, nor can it make early warnings and automatic processing based on the amount of water. In unmanned underground hydropower stations, only relying on early warnings and rapid response by personnel cannot effectively guarantee the waterproof requirements of the underground machine room. Summary of the invention

[0004] The present invention aims to provide a design method for preventing an underground machine room of a hydropower station from being flooded, so as to solve the problem in the prior art of lacking a targeted waterproof design for the machine room according to the water inflow situation.

[0005] The present invention is achieved by adopting the following technical solutions: The present invention provides a design method for preventing an underground machine room of a hydropower station from being flooded, comprising: arranging an environmental monitoring system, a drying system, an adaptive drainage system and a permanent water ingress prevention barrier, connecting the environmental monitoring system, the drying system, the adaptive drainage system and the permanent water ingress prevention barrier to a control system, the environmental monitoring system transmitting collected information to the control system, the control system analyzing and processing the information, determining the type of water ingress into the machine room, and controlling the start-up of the drying system, the adaptive drainage system or the permanent water ingress prevention barrier according to the type of water ingress into the machine room.

[0006] As the preferred technical solution: The control system is connected to the hydropower station monitoring system by wireless communication, and the control system reports the type of water inflow in the machine room and the control measures taken to the hydropower station monitoring system.

[0007] As the preferred technical solution: Arranging the environmental monitoring system includes: arranging monitoring devices at multiple locations according to the actual location and size of the underground machine room.

[0008] As the preferred technical solution: Monitoring devices are arranged at the following four locations. The monitoring devices use sensors, and the sensors are all connected to the control system; Location 1: Inside the computer room; install water level sensors at the four corners and walls inside the computer room, and install humidity sensors on the top of the computer room; Location 2: Outside the wall and entrance door of the computer room. Install water level sensors on the outside of the wall and entrance door of the computer room. Location 3: Mountain drainage channels and staircases within 30 meters around the machine room. Water level sensors are installed in mountain drainage channels and staircases within 30 meters around the machine room. Location 4: Pedestrian passage and traffic tunnel in underground factory building; water level sensors are installed in the pedestrian passage and traffic tunnel in underground factory building.

[0009] The above are used to achieve: comprehensive monitoring of water inflow, water seepage and air humidity in the computer room, monitoring of water seepage or water flowing into the computer room from the external environment of the computer room, monitoring of water inflow from the external environment of the computer room and water seepage from the mountain during the rainy season, and monitoring of water volume during major accidents such as flooding of the factory.

[0010] As the preferred technical solution: There are three categories of water ingress in the computer room, namely category 1, category 2 and category 3; When it is determined that the water inflow in the equipment room belongs to category 1, the drying system is started. When the real-time monitoring data collected by the environmental monitoring system does not meet the conditions corresponding to category 1, the control system controls the drying system to stop running; When it is determined that the category of water inflow in the equipment room belongs to category 2, the adaptive drainage system is started until the real-time monitoring data collected by the environmental monitoring system is less than the start-up condition of the adaptive drainage system, and then the control system controls the adaptive drainage system to stop running; When it is determined that the water ingress situation in the computer room belongs to category 3, the permanent water ingress prevention barrier is activated to prevent water from entering the computer room. When the real-time monitoring data collected by the environmental monitoring system does not meet the conditions corresponding to category 3, the permanent water ingress prevention barrier is manually stopped.

[0011] As the preferred technical solution: When two or more humidity data in position 1 are greater than the set value SV1, and all water level and water flow volume data in position 1 are respectively less than their set values ​​SV2 and SV3, and all water level and water flow volume data in position 2 are respectively less than their set values ​​SV4 and SV5, and all water level and water flow volume data in position 3 are respectively less than their set values ​​SV6 and SV7, and all water level and water flow volume data in position 4 are respectively less than their set values ​​SV8 and SV9, the control system determines that the category of water inflow in the computer room belongs to category 1; When all water level and water flow volume data in position 1 are respectively greater than their set values ​​SV10 and SV11, and all water level and water flow volume data in position 2 are respectively greater than their set values ​​SV12 and SV13, and all water level and water flow volume data in position 3 are respectively greater than their set values ​​SV14 and SV15, and all water level and water flow volume data in position 4 are respectively less than their set values ​​SV16 and SV17, the control system determines that the category of water inflow in the machine room belongs to category 2; When all water level and water flow volume data in position 3 are greater than their set values ​​SV18 and SV19 respectively, and all water level and water flow volume data in position 4 are greater than their set values ​​SV20 and SV21 respectively, the control system determines that the category of water inflow in the computer room belongs to category 3.

[0012] As the preferred technical solution: Each set value is set according to the actual situation. SV18 is greater than SV14, and SV19 is greater than SV15.

[0013] As the preferred technical solution: The drying system includes multiple dehumidifiers, which are connected to the control system for communication and the control system controls their start and stop.

[0014] As the preferred technical solution: The adaptive drainage system includes drainage ditches. Several drainage ditches are arranged along the terrain in different directions in the underground machine room. The drainage ditches are opened or closed by a controllable mechanical structure. The mechanical structure is connected to the control system, and the control system controls the opening and closing of the mechanical structure.

[0015] As the preferred technical solution: The permanent water-proof barrier adopts a waterproof metal mechanical structure, which is arranged inside the wall of the underground machine room. The control system controls its start and stop. The permanent water-proof barrier is used to completely seal the underground machine room.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The design method for preventing the underground machine room of a hydropower station from being flooded of the present invention classifies the water inflow conditions of the underground machine room, and designs different protection measures for different types of water inflow conditions of the machine room, and can realize automatic processing and drainage in the case of small water leakage such as rainwater inflow and mountain leakage, reduce the work of personnel and avoid the threat of water accumulation to the core equipment of the underground machine room, and effectively protect the core control area of ​​the underground power station when major accidents such as flooded plants occur, and avoid the damage of valuable core equipment in the machine room by flooding. After the accident, the machine room only needs simple processing to be put back into use, saving the reconstruction cost after the flooded plant and the underground machine room are flooded. The design method has strong feasibility and can provide a strong guarantee for the underground machine room of the underground hydropower station to prevent water flooding damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a flow chart of a design method for preventing an underground machine room of a hydropower station from being flooded. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1 like Figure 1 As shown, this embodiment proposes a design method for preventing an underground machine room of a hydropower station from being flooded, including: Arrange the environmental monitoring system, drying system, adaptive drainage system and permanent water ingress prevention barrier, connect them to the control system, the environmental monitoring system transmits the collected information to the control system, the control system analyzes and processes the information, determines the type of water ingress in the machine room, and controls the start-up of the drying system, adaptive drainage system or permanent water ingress prevention barrier according to the type of water ingress in the machine room. At the same time, the relevant processing information is communicated to the hydropower station monitoring system.

[0020] The arrangement of the environmental monitoring system includes: arranging a complete set of monitoring devices at the following four locations according to the actual location and size of the underground machine room. The monitoring devices can use various types of sensors.

[0021] Specifically include: Water level sensors are installed at the four corners and walls of the computer room, and humidity sensors are installed on the top of the computer room to fully monitor the data such as water inflow, water seepage, and air humidity in the computer room; the interior of the computer room is position 1; Water level sensors are installed on the periphery of the walls and entrances of the computer room to monitor water seepage from the external environment of the computer room or water flowing into the computer room; the periphery of the walls and entrances of the computer room are position 2; Install water level sensors in the mountain drainage channels, staircase channels and other channels near the computer room (according to the mountain structure and actual channel structure layout) to monitor the water from the external environment of the computer room and the water seepage from the mountain during the rainy season; the mountain drainage channels and staircase channels near the computer room are position 3; Water level sensors are installed in the pedestrian passages of the underground plant (including passages in the core power generation area such as turbine generators) and the traffic tunnels near the machine room to monitor the water volume in the event of major accidents such as flooding of the plant; the pedestrian passages and traffic tunnels in the underground plant are position 4.

[0022] Among them, the humidity sensor and each water level sensor are connected to the control system to transmit the collected data to the control system. The water level sensor can measure the water level and water flow volume. For the above four locations, at least three sets of water level sensors are installed at each location. Each set of water level sensors collects water level, water flow, and water leakage volume data, and fills the collected data in the environmental monitoring system collection table.

[0023] Table 1 Environmental monitoring system collection table

[0024] The control system includes a programmable data processor (PLC), communication interface and modules, which are mainly used to receive, analyze and process data collected by the environmental monitoring system, and determine the type of water ingress into the machine room. According to the type of water ingress into the machine room, the opening and closing of the drying system, adaptive drainage system and permanent anti-water ingress barrier are controlled, and the existing monitoring system of the hydropower station is communicated. Therefore, the control system is a data processing center, a control center and a communication center.

[0025] In this embodiment, the categories of water ingress in the computer room are divided into three categories, namely, category 1, category 2, and category 3; When it is determined that the water ingress into the computer room belongs to category 1, the drying system is started to reduce the moisture in the computer room. When the real-time monitoring data collected by the environmental monitoring system does not meet the conditions corresponding to category 1, the control system controls the drying system to stop running.

[0026] When it is determined that the water ingress into the computer room belongs to category 2, the adaptive drainage system is started to increase the drainage capacity of the computer room and effectively control the water volume in the computer room until the real-time monitoring data collected by the environmental monitoring system is less than the start-up condition of the adaptive drainage system. The control system then controls the adaptive drainage system to stop running.

[0027] When it is determined that the water ingress situation in the computer room belongs to category 3, the permanent water ingress prevention barrier is activated to completely block the passage between the underground computer room and the outside world to prevent water from entering the computer room. After the flood crisis is resolved, the permanent water ingress prevention barrier is manually stopped.

[0028] The control system can generate events when it determines the type of water inflow in the equipment room and the corresponding control situation, and communicate with the existing monitoring system to facilitate the operation and maintenance personnel to remotely understand the accurate situation of the equipment room. The permanent anti-water inflow barrier is activated when the plant is partially flooded or flooded. It will be manually lifted after the accident is handled and the flood crisis is resolved.

[0029] The types of water ingress in the equipment room are determined according to the following table: Table 2 Classification table of water ingress in the equipment room

[0030] Among them, & represents "and". For example, when multiple conditions corresponding to category 1 are met at the same time, the category of water inflow in the computer room can be judged as belonging to category 1. The same applies to other categories. All water level and water flow volume data in position 1 are respectively less than their set values ​​SV2 and SV3, which means that all water level data in position 1 are less than their set value SV2, and all water flow volume data in position 1 are less than their set value SV3. The same applies to others.

[0031] Each set value is set according to actual conditions. The water level setting value SV18 in position 3 of category 3 is significantly greater than the water level setting value SV14 in position 3 of category 2. The water flow volume setting value SV19 in position 3 of category 3 is significantly greater than the water flow volume setting value SV15 in position 3 of category 2.

[0032] The drying system includes multiple dehumidifiers, which can communicate with the control system and control their start and stop after judgment by the control system. Under normal circumstances, the temperature and humidity of the underground machine room can be achieved by precision air conditioning, and the drying system can be kept from starting through reasonable parameter settings. The system is designed for the large amount of moisture condensation in the underground machine room during the rainy season.

[0033] The adaptive drainage system includes drainage ditches. Under the premise of not destroying the overall structure of the underground machine room and meeting safety requirements, a certain number of small drainage ditches are set up in different directions along the terrain in the underground machine room. The drainage ditches are opened or closed using a controllable mechanical structure, and the mechanical structure is controlled by the control system. Under normal circumstances, they are not opened. When there is a lot of water seepage in the mountain or a small amount of water flows into the machine room from the channel outside the machine room during the rainy season, they are opened to increase the drainage volume of the underground machine room.

[0034] The permanent anti-water ingress barrier adopts a waterproof metal mechanical structure. It is arranged in the wall of the underground machine room and is activated by the control system. It can close all corners and passages of the underground machine room in a short time to prevent any possible water flow from entering.

[0035] The design method for preventing the underground machine room of a hydropower station from being flooded of the present invention classifies the water inflow conditions of the underground machine room, and designs different protection measures for different types of water inflow conditions of the machine room, and can realize automatic processing and drainage in the case of small water leakage such as rainwater inflow and mountain leakage, reduce the work of personnel and avoid the threat of water accumulation to the core equipment of the underground machine room, and effectively protect the core control area of ​​the underground power station when major accidents such as flooded plants occur, and avoid the damage of valuable core equipment in the machine room by flooding. After the accident, the machine room only needs simple processing to be put back into use, saving the reconstruction cost after the flooded plant and the underground machine room are flooded. The design method has strong feasibility and can provide a strong guarantee for the underground machine room of the underground hydropower station to prevent water flooding damage.

[0036] The present invention is based on the actual situation of a hydropower underground powerhouse in Yunnan, and designs a complete set of methods to prevent water from entering the underground powerhouse. When water enters the powerhouse to different degrees, the underground powerhouse can realize the function of automatic self-protection to prevent the underground powerhouse from being flooded, thus providing strong guarantee for the intelligent and automated operation of the hydropower station.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A design method for preventing the underground machine room of a hydropower station from being flooded, characterized in that: include: Arrange the environmental monitoring system, drying system, adaptive drainage system and permanent water ingress prevention barrier, connect them to the control system, the environmental monitoring system transmits the collected information to the control system, the control system analyzes and processes the information, determines the type of water ingress in the computer room, and controls the start-up of the drying system, adaptive drainage system or permanent water ingress prevention barrier according to the type of water ingress in the computer room.

2. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 1 is characterized by: The control system is connected to the hydropower station monitoring system by wireless communication, and the control system reports the type of water inflow in the machine room and the control measures taken to the hydropower station monitoring system.

3. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 1 is characterized by: Arranging the environmental monitoring system includes: arranging monitoring devices at multiple locations according to the actual location and size of the underground machine room.

4. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 3 is characterized by: Monitoring devices are arranged at the following four locations. The monitoring devices use sensors, and the sensors are all connected to the control system; Location 1: Inside the computer room; install water level sensors at the four corners and walls inside the computer room, and install humidity sensors on the top of the computer room; Location 2: Outside the wall and entrance door of the computer room. Install water level sensors on the outside of the wall and entrance door of the computer room. Location 3: Mountain drainage channels and staircases within 30 meters around the machine room. Water level sensors are installed in mountain drainage channels and staircases within 30 meters around the machine room. Location 4: Pedestrian passage and traffic tunnel in underground factory building; water level sensors are installed in the pedestrian passage and traffic tunnel in underground factory building.

5. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 4 is characterized by: There are three categories of water ingress in the computer room, namely category 1, category 2 and category 3; When it is determined that the water inflow in the equipment room belongs to category 1, the drying system is started. When the real-time monitoring data collected by the environmental monitoring system does not meet the conditions corresponding to category 1, the control system controls the drying system to stop running; When it is determined that the category of water inflow in the equipment room belongs to category 2, the adaptive drainage system is started until the real-time monitoring data collected by the environmental monitoring system is less than the start-up condition of the adaptive drainage system, and then the control system controls the adaptive drainage system to stop running; When it is determined that the water ingress situation in the computer room belongs to category 3, the permanent water ingress prevention barrier is activated to prevent water from entering the computer room. When the real-time monitoring data collected by the environmental monitoring system does not meet the conditions corresponding to category 3, the permanent water ingress prevention barrier is manually stopped.

6. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 5 is characterized by: When two or more humidity data in position 1 are greater than the set value SV1, and all water level and water flow volume data in position 1 are respectively less than their set values ​​SV2 and SV3, and all water level and water flow volume data in position 2 are respectively less than their set values ​​SV4 and SV5, and all water level and water flow volume data in position 3 are respectively less than their set values ​​SV6 and SV7, and all water level and water flow volume data in position 4 are respectively less than their set values ​​SV8 and SV9, the control system determines that the category of water inflow in the computer room belongs to category 1; When all water level and water flow volume data in position 1 are respectively greater than their set values ​​SV10 and SV11, and all water level and water flow volume data in position 2 are respectively greater than their set values ​​SV12 and SV13, and all water level and water flow volume data in position 3 are respectively greater than their set values ​​SV14 and SV15, and all water level and water flow volume data in position 4 are respectively less than their set values ​​SV16 and SV17, the control system determines that the category of water inflow in the machine room belongs to category 2; When all water level and water flow volume data in position 3 are greater than their set values ​​SV18 and SV19 respectively, and all water level and water flow volume data in position 4 are greater than their set values ​​SV20 and SV21 respectively, the control system determines that the category of water inflow in the computer room belongs to category 3.

7. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 6 is characterized by: Each set value is set according to the actual situation, SV18 is greater than SV14, and SV19 is greater than SV15.

8. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 5 is characterized by: The drying system includes multiple dehumidifiers, which are connected to the control system for communication and the control system controls their start and stop.

9. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 5 is characterized by: The adaptive drainage system includes drainage ditches. Several drainage ditches are arranged along the terrain in different directions in the underground machine room. The drainage ditches are opened or closed by a controllable mechanical structure. The mechanical structure is connected to the control system, and the control system controls the opening and closing of the mechanical structure.

10. The design method for preventing the underground machine room of a hydropower station from being flooded according to claim 5, characterized in that: The permanent water-proof barrier adopts a waterproof metal mechanical structure, which is arranged inside the wall of the underground machine room. The control system controls its start and stop. The permanent water-proof barrier is used to completely seal the underground machine room.

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