Multi-stage linkage protection method for preventing plant from being flooded

Abstract

The invention relates to the technical field of flooding intrusion information management and control, in particular to a multistage linkage protection method for preventing a plant from being flooded. The method comprises the following steps: performing three-dimensional modeling processing on the hydropower house according to physical construction parameters of the hydropower house to generate a three-dimensional model of the hydropower house; performing water level gauge distribution configuration analysis according to the three-dimensional model of the hydropower station workshop to generate water level gauge distribution configuration data; performing water level monitoring processing on the water level gauge equipment through the water level gauge distribution configuration data to generate water level monitoring data; performing real-time monitoring drainage flow analysis on the main shaft sealing drainage pipeline of the hydropower station plant to generate real-time monitoring drainage flow data; executing drainage flow monitoring feedback operation based on the real-time monitored drainage flow data; and water level monitoring feedback control operation is performed on the water level monitoring data through a distribution box relay arranged in the water level monitoring equipment. According to the invention, safe and reliable multi-point linkage protection for preventing the plant from being flooded is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of water flooding intrusion information control and management, and in particular to a multi-level linkage protection method for preventing water flooding of factory buildings. Background Art

[0002] There are many reasons for the occurrence of flooding accidents in hydropower plants, which can be generally divided into internal and external reasons. Internal reasons include: large amounts of water inflow due to rupture of penstocks, volutes, elbows, technical water supply system pipelines, fire water supply pipelines, or damage to the mechanical parts of turbines; external reasons include: the dam surface, top drainage corridors, access roads, etc. are affected by natural disasters such as mountain torrents and mudslides, causing flood backflow. In terms of the prevention of flooding accidents, pre-emptive prevention can prevent accidents to a large extent, such as ensuring the safe and reliable operation of the units, inspecting the pipelines in the plant and the flood discharge gate control system of the power station, etc., and the purpose of in-process handling is to prevent the flooding accident from further expanding, thereby endangering equipment and personal safety. In the process of in-process handling, it is necessary to use the hydropower station's anti-flooding plant protection system. However, the existing hydropower station flooding prevention plant protection systems are all equipped with flooding prevention plant protection systems, but most of them only adopt a simple over-limit alarm strategy. The entire protection system does not fully consider the water source environment, accident classification and grading, and single water source measurement point. It is crucial to have a more stable and reliable flooding prevention plant protection system. Summary of the invention

[0003] Based on this, the present invention provides a multi-stage linkage protection method for preventing factory buildings from being flooded, so as to solve at least one of the above technical problems.

[0004] To achieve the above purpose, a multi-level linkage protection method for preventing flooding of a factory building comprises the following steps:

[0005] Step S1: obtaining the physical construction parameters of the hydropower plant building; performing three-dimensional modeling of the hydropower plant building according to the physical construction parameters of the hydropower plant building to generate a three-dimensional model of the hydropower plant building; performing water level gauge distribution configuration analysis according to the three-dimensional model of the hydropower plant building to generate water level gauge distribution configuration data, wherein the water level gauge distribution configuration data includes corridor water level gauge distribution configuration data and wellhead water level gauge distribution configuration data;

[0006] Step S2: Performing water level monitoring processing on the water level meter equipment through the water level meter distribution configuration data to generate water level monitoring data, wherein the water level meter equipment is respectively a Mack MDMH50 horizontally arranged water level meter equipment and a barreled wellhead water level meter equipment, and the water level monitoring data includes corridor water level monitoring data and wellhead water level monitoring data;

[0007] Step S3: Real-time monitoring and drainage flow analysis is performed on the main shaft seal drainage pipe of the hydropower station building by using a contact-type flow meter device to generate real-time monitoring drainage flow data; and drainage flow monitoring feedback operations are performed based on the real-time monitoring drainage flow data;

[0008] Step S4: performing a water level monitoring feedback control operation on the water level monitoring data through the built-in distribution box relay of the water level monitoring device.

[0009] Further, step S1 includes the following steps:

[0010] Step S11: obtaining the physical construction parameters of the hydropower station plant;

[0011] Step S12: performing three-dimensional modeling of the hydropower station building according to the physical construction parameters of the hydropower station building to generate a three-dimensional model of the hydropower station building;

[0012] Step S13: performing terrain feature analysis of the powerhouse corridor and the powerhouse water well entrance respectively through the three-dimensional model of the hydropower plant building, and generating terrain feature data of the powerhouse corridor and the powerhouse water well entrance respectively;

[0013] Step S14: analyzing the accident protection height of the plant corridor according to the terrain feature data of the plant corridor, and generating accident protection height data of the plant corridor;

[0014] Step S15: performing corridor water level gauge distribution configuration analysis according to the plant corridor terrain feature data and the plant corridor accident protection height data, and generating corridor water level gauge distribution configuration data;

[0015] Step S16: Perform distribution and configuration analysis of water level gauges at the water well entrances according to the topographical feature data of the water well entrances of the powerhouse, and generate distribution and configuration data of water level gauges at the water well entrances.

[0016] Further, step S2 includes the following steps:

[0017] Step S21: configuring the corridor water level gauge for the Mack MDMH50 horizontally arranged water level gauge device through the corridor water level gauge distribution configuration data, and performing corridor water level monitoring processing through the configured Mack MDMH50 horizontally arranged water level gauge device to generate corridor water level monitoring data;

[0018] Step S22: configuring the barreled water wellhead water level gauge device through the water wellhead water level gauge distribution configuration data, and performing water wellhead water level monitoring processing through the configured barreled water wellhead water level gauge device to generate water wellhead water level monitoring data.

[0019] Further, step S3 includes the following steps:

[0020] Step S31: monitoring the flow rate and pressure of the main shaft seal drainage pipe of the hydropower station building by using a contact-type immersion flow meter device to generate flow rate and pressure monitoring data;

[0021] Step S32: performing flow rate electrical signal conversion processing on the flow rate pressure monitoring data to generate flow rate electrical signal data;

[0022] Step S33: Performing real-time monitoring and drainage flow analysis on the flow electrical signal data through the local control unit to generate real-time monitoring drainage flow data;

[0023] Step S34: Execute drainage flow monitoring feedback operation based on real-time monitoring drainage flow data.

[0024] Furthermore, the drainage flow monitoring and feedback operation in step S34 includes the following steps:

[0025] When the real-time monitored drainage flow data is within the preset flow threshold, a normal flow signal feedback is performed; or, when the real-time monitored drainage flow data is above the preset flow threshold, an abnormal flow signal feedback is performed.

[0026] Furthermore, the water level monitoring feedback control operation includes a first-level water level monitoring abnormal signal light feedback operation or a second-level water level alarm signal linkage control operation, and step S4 includes the following steps:

[0027] Step S41: performing water level monitoring feedback signal analysis on the water level monitoring data through the built-in distribution box relay of the water level monitoring device, wherein the built-in distribution box relay of the water level monitoring device includes a first signal node of the relay, a second signal node of the relay, a third signal node of the relay and a fourth signal node of the relay, including: when the water level monitoring data is less than the first water level monitoring threshold of the water level monitoring device, generating a conventional water level monitoring feedback signal; when the water level monitoring data is not less than the first water level monitoring threshold of the water level monitoring device and is less than the second water level monitoring threshold of the water level monitoring device, generating a first-level water level alarm signal through the first signal node of the relay; when the water level monitoring data is not less than the second water level monitoring threshold of the water level monitoring device, generating a second-level water level alarm signal through the second signal node of the relay, wherein the first water level monitoring threshold of the water level monitoring device is less than the second water level monitoring threshold of the water level monitoring device;

[0028] Step S42: When a first-level water level alarm signal is identified, a first-level water level monitoring abnormal signal light feedback operation is performed through the built-in distribution box indicator light of the water level monitoring device;

[0029] Step S43: When a secondary water level alarm signal is identified, a secondary water level alarm signal linkage control operation is executed.

[0030] Furthermore, in step S41, the second signal node of the relay is connected to the third signal node of the relay and the fourth signal node of the relay.

[0031] Furthermore, the secondary water level alarm signal linkage control operation in step S43 includes the following steps:

[0032] The third signal node of the relay connected to the second signal node of the relay performs a plant host protection operation on the local control unit;

[0033] The fourth signal node of the relay connected through the second signal node of the relay respectively executes the secondary water level monitoring abnormal alarm feedback for the local control unit and the secondary water level monitoring abnormal signal light feedback operation for the distribution box indicator light.

[0034] Furthermore, before executing the secondary water level alarm signal linkage control operation, step S43 includes setting a wellhead water level delay protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the wellhead water level monitoring data in the water level monitoring data through preset water level protection delay data.

[0035] Furthermore, before executing the secondary water level alarm signal linkage control operation, step S43 includes setting the gallery water level instant protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the gallery water level monitoring data in the water level monitoring data.

[0036] The beneficial effect of this application is that the physical construction parameters and terrain characteristics of the hydropower plant can be fully considered through three-dimensional modeling analysis, an accurate three-dimensional model of the plant can be generated, and the distribution and configuration of the water level gauge can be analyzed in combination with key locations such as corridor terrain and well entrances. This pre-analysis and modeling process enables the water level gauge to be scientifically and reasonably arranged at key monitoring points, such as corridors and wellheads, so as to achieve more comprehensive and accurate water level monitoring and significantly improve the prevention capability of flooded plants. Through the configuration of the Mack MDMH50 horizontally arranged water level gauge and the barreled wellhead water level gauge, the corridor water level and the wellhead water level are monitored in real time respectively. The two types of water level gauges are used in combination and complement each other to ensure the comprehensive monitoring and response capability of water level changes in different areas of the hydropower station. In particular, the monitoring of wellheads can effectively prevent flooding and reduce the risk of equipment flooding. Through the contact-type drop-in flowmeter device, the water flow changes of the main shaft seal drainage pipeline are monitored in real time. The device converts flow data into standard electrical signals through flow and pressure monitoring, and transmits them to the local control unit (LCU) for real-time analysis, so that the hydropower station can detect abnormal drainage flow in time and avoid flooding accidents caused by insufficient drainage, thereby improving the safety level of the plant. The monitoring data is optimized and processed by a linear algorithm, and the data is fed back and analyzed by the local control unit to ensure the accuracy and processing efficiency of real-time data. This precise data optimization and feedback mechanism enables the hydropower station to make timely decisions based on higher-quality data, thereby improving the protection capability of the plant. Through the real-time collection and processing of flow, pressure and water level data, it can respond quickly and take corresponding measures. When the flow or water level is abnormal, the system can quickly analyze the data and respond, greatly improving the response speed of the hydropower station to emergencies and reducing the dependence on human intervention. The local control unit analyzes the drainage flow in real time, combined with the set flow threshold, and the system can intelligently determine whether there is a drainage problem. If the monitored drainage flow exceeds the preset threshold, the system will immediately feedback the abnormal flow signal and start the processing program. This feedback control mechanism ensures the precise scheduling of the drainage system by the hydropower station and reduces the occurrence of equipment failures or unexpected shutdowns. The relay in the distribution box can automatically adjust the feedback signal according to the water level monitoring data and automatically trigger the preset control strategy. When the water level reaches the first-level alarm threshold, the relay will send out a first-level alarm signal and feedback through the indicator light to notify the staff. If the water level exceeds the second-level alarm threshold, the system will perform emergency linkage control operations, start the plant host protection and other protection measures, thereby effectively preventing the expansion of flooding accidents. Combining the first-level water level monitoring abnormal signal light feedback and the second-level water level alarm signal linkage control, it can immediately issue an alarm when the water level exceeds the preset threshold, and remind the staff through indicator lights and voice alarms. This multi-level, hierarchical alarm mechanism ensures that the hydropower station can take timely action when there is a risk of flooding.Through the delayed protection mechanism of the water level monitoring data at the wellhead, a reasonable reaction time is provided when the water level rises to avoid misoperation or overreaction. The delay mechanism can buy more inspection and judgment time for the on-duty personnel, reduce unnecessary downtime, and effectively avoid the waste of equipment downtime due to false alarms. For the corridor water level monitoring data, the system is equipped with an immediate protection mechanism. Once the water level exceeds the preset secondary alarm threshold, the system will immediately start the emergency shutdown process to minimize the losses caused by flooding. Through technical means such as multi-point linkage water level monitoring, drainage flow monitoring and feedback control, the safety of the hydropower plant has been greatly improved. Through precise water level monitoring, flow control and intelligent alarm, the hydropower station can effectively warn and intervene before the flooding accident occurs, minimize the damage caused by the risk of flooding to the equipment, and improve the reliability and service life of the equipment. The multi-level linkage protection method adopted reduces human operation errors and improves the level of automated management of the plant through automated monitoring, alarm and feedback mechanisms. Based on the intelligent decision support system of real-time data, the hydropower station can make adaptive adjustments under various working conditions, optimize equipment operation, and ensure the safe and stable operation of the plant. Therefore, the multi-level linkage protection method for preventing plant flooding of the present invention is based on the technology of hierarchical and classified multi-measurement points, analyzes the water source environment, measurement method, and accident alarm level of the hydropower station corridor, and designs a set of multi-point linkage protection scheme for preventing plant flooding that meets the maximum economic benefits of the hydropower station and is safe and reliable according to the data of four measurement points such as the flow rate of the main shaft sealing drainage pipe, the leakage collection well entrance door, the maintenance collection well entrance door, and the corridor ground water level. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic flow chart of the steps of a multi-stage linkage protection method for preventing flooding of a factory building according to the present invention;

[0038] Figure 2 for Figure 1 Detailed implementation steps of step S1 in FIG.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical method of the present invention is described clearly and completely 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In addition, the accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. The functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor methods and / or microcontroller methods.

[0042] It should be understood that, although the terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are used only to distinguish one unit from another unit. For example, without departing from the scope of the exemplary embodiments, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items.

[0043] To achieve this, please refer to Figure 1 to Figure 2 The present invention provides a multi-stage linkage protection method for preventing flooding of a factory building, comprising the following steps:

[0044] Step S1: obtaining the physical construction parameters of the hydropower plant building; performing three-dimensional modeling of the hydropower plant building according to the physical construction parameters of the hydropower plant building to generate a three-dimensional model of the hydropower plant building; performing water level gauge distribution configuration analysis according to the three-dimensional model of the hydropower plant building to generate water level gauge distribution configuration data, wherein the water level gauge distribution configuration data includes corridor water level gauge distribution configuration data and wellhead water level gauge distribution configuration data;

[0045] Step S2: Performing water level monitoring processing on the water level meter equipment through the water level meter distribution configuration data to generate water level monitoring data, wherein the water level meter equipment is respectively a Mack MDMH50 horizontally arranged water level meter equipment and a barreled wellhead water level meter equipment, and the water level monitoring data includes corridor water level monitoring data and wellhead water level monitoring data;

[0046] Step S3: Real-time monitoring and drainage flow analysis is performed on the main shaft seal drainage pipe of the hydropower station building by using a contact-type flow meter device to generate real-time monitoring drainage flow data; and drainage flow monitoring feedback operations are performed based on the real-time monitoring drainage flow data;

[0047] Step S4: performing a water level monitoring feedback control operation on the water level monitoring data through the built-in distribution box relay of the water level monitoring device.

[0048] As an embodiment of the present invention, refer to Figure 1The above is a schematic flow chart of the steps of a multi-stage linkage protection method for preventing flooding of a factory building according to the present invention. In this embodiment, the multi-stage linkage protection method for preventing flooding of a factory building comprises the following steps:

[0049] Step S1: obtaining the physical construction parameters of the hydropower plant building; performing three-dimensional modeling of the hydropower plant building according to the physical construction parameters of the hydropower plant building to generate a three-dimensional model of the hydropower plant building; performing water level gauge distribution configuration analysis according to the three-dimensional model of the hydropower plant building to generate water level gauge distribution configuration data, wherein the water level gauge distribution configuration data includes corridor water level gauge distribution configuration data and wellhead water level gauge distribution configuration data;

[0050] In an embodiment of the present invention, all necessary construction data of the hydropower plant building are collected as the basis for subsequent modeling. By extracting data from an existing database, or using high-precision measurement tools such as laser scanners and total stations to measure the hydropower plant building on site, the external and internal structural parameters of the plant building are obtained. These parameters include but are not limited to the external structural dimensions of the plant building (such as the length, width, and height of the plant building), the height difference of each area in the plant building, the opening position (such as the position of doors and windows), the layout of walls and floors, and the location of various equipment (such as turbines, generator sets, etc.). In addition, the relative positions of key facilities such as the drainage system, seepage collection wells, and pipeline layout of the plant building need to be obtained. These data will provide basic information for subsequent three-dimensional modeling and water level gauge configuration. Use CAD, BIM or other three-dimensional modeling software (such as AutoCAD, Revit, SketchUp, etc.) to model the physical construction parameters. According to the external dimensions and structure of the powerhouse, a three-dimensional external outline of the powerhouse is generated, including the general appearance of the roof, wall, etc., and the various spaces inside the powerhouse (such as the unit area, operation hall, maintenance corridor, etc.) are further modeled to accurately display the internal structure and equipment layout of the powerhouse, ensuring that the size and layout of each functional area can be accurately reflected in the three-dimensional model. Based on the actual measurement data, a three-dimensional model of the drainage pipes, sealed drainage system and other key facilities is established to ensure that these facilities are fully presented in the model, thereby reflecting the actual physical characteristics of the hydropower plant and its functional areas. The terrain of the powerhouse corridor and the well entrance is analyzed in detail using three-dimensional modeling software. During the analysis, it is necessary to evaluate the terrain changes, slopes and drainage capacity of the powerhouse corridor, and generate terrain feature data of the corridor area, including the elevation distribution of the corridor, the relative height of the equipment installation point, etc. In addition, it is necessary to check the drainage performance of the corridor area and identify possible water accumulation points or low-lying areas. A similar analysis is performed on the well entrance area to confirm the relative position of the well mouth and the height difference with the surrounding equipment, and generate terrain feature data of the well mouth. Further analysis of the topographic feature data of the power plant corridor determines the accident protection height of the power plant corridor. This height refers to the water level value that can trigger an alarm and start emergency protection measures when the water level rises to a certain height. By identifying the lowest point of the corridor and the relative height of key equipment, combined with the actual operation requirements of the plant (such as the safety height requirements when the unit is shut down due to an accident), set appropriate alarm trigger points for the water level gauge and ensure the safety of the equipment. The generated accident protection height data of the power plant corridor will provide necessary reference for the subsequent layout of the water level gauge and water level alarm control. By combining the topographic feature data of the corridor and the accident protection height data, the layout analysis of the water level gauge in the corridor is carried out. Ensure that the water level gauge can cover the key areas of the corridor, especially the low-lying areas around the equipment, and can monitor the water level changes in real time. According to the measurement accuracy requirements and layout needs of the water level gauge, select a suitable type of water level gauge (for example, the Mack MDMH50 horizontal layout water level gauge).Reasonably set the installation spacing and height between water level gauges to ensure that there are no blind spots in water level monitoring. In addition, it is necessary to set the trigger point of the alarm signal according to the accident protection height data of the plant, and generate the distribution configuration data of the corridor water level gauge to provide a detailed basis for the installation of the water level gauge and subsequent water level alarm control. By analyzing the terrain feature data of the wellhead, the optimal layout position of the wellhead water level gauge is determined to ensure that the water level changes at the wellhead can be accurately monitored and potential flooding risks can be discovered in time. According to the terrain characteristics of the well entrance and the needs of the plant, select the appropriate type of water level gauge (such as a barreled wellhead water level gauge) and configure it according to the special needs of the wellhead. The generated wellhead water level gauge distribution configuration data will be used for subsequent water level gauge installation and monitoring operations.

[0051] Step S2: Performing water level monitoring processing on the water level meter equipment through the water level meter distribution configuration data to generate water level monitoring data, wherein the water level meter equipment is respectively a Mack MDMH50 horizontally arranged water level meter equipment and a barreled wellhead water level meter equipment, and the water level monitoring data includes corridor water level monitoring data and wellhead water level monitoring data;

[0052] In an embodiment of the present invention, according to the distribution configuration data of the corridor water level meter, a suitable water level meter device is selected to monitor the corridor water level. The corridor layer of the hydropower plant building usually has a certain spatial length and multiple key areas (such as low-lying areas next to the equipment), so it is necessary to select the Mike MDMH50 horizontally arranged water level meter device, which is suitable for arrangement in a long and spacious corridor. According to the distribution configuration data of the corridor water level meter, the installation position of each water level meter is determined to ensure that they can cover the water level changes of the entire corridor, especially in low-lying areas prone to water accumulation. Each unit is usually equipped with 3 water level meters, and the spacing between the water level meters is set to 60 cm to ensure the accuracy and full coverage of water level monitoring. The water level meter adopts a horizontal horizontal equal height arrangement method to ensure the measurement accuracy of all water level meters. In addition, the water level meter equipment needs to be level with the ground and firmly fixed in the specified position by means of a wall bracket. Once the equipment configuration is completed and installed, the Mike MDMH50 horizontally arranged water level meter equipment is started to monitor the corridor water level. The water level meter equipment collects the water level data in the corridor in real time through its built-in sensor, and transmits the data to the local control system (such as LCU) through a cable. In the system, these water level data will be processed to generate corridor water level monitoring data. These data can reflect the changing trend of the water level in the hydropower plant in real time and provide necessary information for the water level alarm system. At the same time, according to the distribution configuration data of the wellhead water level meter, the barrel-mounted wellhead water level meter equipment is selected for configuration to ensure that the water level changes in the wellhead area can also be accurately monitored. The wellhead water level meter is mainly used to monitor the water level changes in important areas such as leakage collection wells and maintenance collection wells. Three barrel-mounted float water level gauges are usually arranged at the entrance of each well. By installing these water level gauges, the water level rise in the well can be detected in time. During installation, the water level gauge should be close to the bottom of the wellhead to ensure that the water level changes can be accurately monitored and avoid interference with the water level gauge by other equipment in the well (such as water pumps, drainage pipes, etc.). After the installation of the wellhead water level meter is completed, the barreled wellhead water level meter equipment is started to monitor the wellhead water level. The water level meter equipment monitors the water level of the wellhead in real time through the float principle, and the monitoring data is also transmitted to the control system through the sensor. The generated wellhead water level monitoring data will be used for subsequent water level analysis to ensure that the water level changes in the well area can be detected in time, thereby avoiding equipment damage or flooding accidents caused by excessive water levels.

[0053] Step S3: Real-time monitoring and drainage flow analysis is performed on the main shaft seal drainage pipe of the hydropower station building by using a contact-type flow meter device to generate real-time monitoring drainage flow data; and drainage flow monitoring feedback operations are performed based on the real-time monitoring drainage flow data;

[0054] In an embodiment of the present invention, a contact flowmeter is used to install and monitor the main shaft seal drainage pipeline of the hydropower station plant. The contact drop-in flowmeter uses the piezoresistance principle or other sensing technology to monitor the flow and pressure data in the drainage pipeline in real time. The flowmeter is installed at a key position of the main shaft seal drainage pipeline to ensure that the change of water flow can be detected in real time. The sensor of the flowmeter measures the pressure fluctuation of the water flow in the pipeline and transmits the data to the control system in real time. By monitoring the pressure change, the flowmeter can provide accurate flow data, which will be used as the basis for subsequent analysis and feedback. The pressure data collected by the flowmeter will be converted into a standardized electrical signal through a built-in signal processing algorithm. After conversion, the output signal of the flowmeter becomes a flow electrical signal suitable for processing by a control system (such as a local control unit LCU). By applying a linear algorithm (for example, based on a known relationship between flow and pressure), the system converts the original pressure data into a current signal (such as a 4-20mA DC signal) that is linearly related to the flow. This flow electrical signal enables the monitoring system to accurately determine the change of water flow and provide standardized data input for subsequent real-time analysis and feedback control. Once the flow data is converted into a linear electrical signal, the local control unit (LCU) will monitor and analyze it in real time. By receiving flow signals, LCU processes and analyzes the changes in water flow in the drainage pipe in real time. This includes calculating the current flow value in real time and comparing it with the preset normal range to determine whether there are abnormal fluctuations or potential failure risks. Based on the real-time monitoring data, LCU can accurately reflect the working status of the hydropower station drainage system, identify any abnormal conditions that exceed the preset threshold, and provide timely feedback to the operator. Once the drainage flow data is detected to be abnormal or exceeds the set safety threshold, LCU will automatically perform feedback operations to ensure the normal operation of the drainage system and prevent the occurrence of flooding accidents. Feedback operations are divided into two situations: if the drainage flow does not exceed the preset flow threshold, the system will maintain the normal drainage operation state; if the drainage flow exceeds the threshold, the system will trigger abnormal flow feedback, and will issue a warning to the on-duty personnel through sound and light alarms, remote notifications or control panel indicators to remind the possible drainage failures or water level abnormalities.

[0055] Step S4: performing a water level monitoring feedback control operation on the water level monitoring data through the built-in distribution box relay of the water level monitoring device.

[0056] In the embodiment of the present invention, the water level monitoring data is fed back and controlled by the built-in distribution box relay of the water level monitoring device, the water level monitoring data is signal analyzed by the relay, and the corresponding alarm and control operation is triggered based on the analysis result, so as to ensure that the hydropower plant can respond in time when the water level changes abnormally and take necessary protective measures. First, the water level monitoring device receives data from the water level meter through its built-in distribution box relay system. The water level meter transmits the real-time monitored water level data to the distribution box, which contains multiple relay nodes for analyzing and feedback controlling these data. Specifically, the distribution box relay includes a first signal node, a second signal node, a third signal node and a fourth signal node, which are respectively associated with the alarm signal of the water level meter. When the water level monitoring data reaches the set threshold, the relay node generates alarm signals of different levels according to the preset logic. When the water level monitoring data is less than the set first water level monitoring threshold, the relay generates a conventional water level monitoring feedback signal, and the system considers that the water level is in a safe range and no further action is required. If the water level monitoring data is between the first water level monitoring threshold and the second water level monitoring threshold, the first signal node of the relay will trigger the first-level water level alarm signal. At this time, the indicator light in the distribution box will light up, and the system will start the early warning and notify the operator. If the water level exceeds the second water level monitoring threshold, the second signal node will trigger the second-level water level alarm signal. At this time, the red indicator light in the distribution box will light up, indicating that the water level has reached a dangerous level and emergency protection measures must be taken. Under this feedback mechanism, the relay of the distribution box is also connected to relays K1, K2, K3, etc. to generate the first-level alarm signal, while relays K4, K5, and K6 are connected to the second signal node to process the second-level alarm signal. When relays K1, K2, and K3 are energized, the hydropower station monitoring system will issue a warning, start the early warning program, and prompt the staff to pay attention to the water level changes. When relays K4, K5, and K6 are energized, the system will further issue a stronger warning and may initiate relevant emergency response measures. After identifying the first or second-level water level alarm signal, the indicator light of the distribution box will perform feedback operations according to the alarm level. When the primary water level alarm signal is identified, the indicator light will light up to remind the staff to take measures. When the secondary water level alarm signal is triggered, relays K7, K8, etc. will start the plant host protection operation, and execute the equipment shutdown operation through the LCU host protection system to ensure that the plant equipment is protected in time under the risk of flooding and avoid greater losses. The secondary water level alarm signal linkage control operation further triggers emergency processing operations: the auxiliary nodes of relays K7 and K8 will start the plant's voice alarm system and display an emergency alarm in the monitoring system. At the same time, the system will set a delayed protection mechanism according to the specific water level position and equipment height, and configure a delayed protection strategy for certain water level meters (such as wellhead water level meters).After the delay, the system will start the emergency shutdown process of the unit according to the water level changes and the actual height of the well, and cancel the protection process within 5 minutes as needed to avoid misoperation.

[0057] Further, step S1 includes the following steps:

[0058] Step S11: obtaining the physical construction parameters of the hydropower station plant;

[0059] Step S12: performing three-dimensional modeling of the hydropower station building according to the physical construction parameters of the hydropower station building to generate a three-dimensional model of the hydropower station building;

[0060] Step S13: performing terrain feature analysis of the powerhouse corridor and the powerhouse water well entrance respectively through the three-dimensional model of the hydropower plant building, and generating terrain feature data of the powerhouse corridor and the powerhouse water well entrance respectively;

[0061] Step S14: analyzing the accident protection height of the plant corridor according to the terrain feature data of the plant corridor, and generating accident protection height data of the plant corridor;

[0062] Step S15: performing corridor water level gauge distribution configuration analysis according to the plant corridor terrain feature data and the plant corridor accident protection height data, and generating corridor water level gauge distribution configuration data;

[0063] Step S16: Perform distribution and configuration analysis of water level gauges at the water well entrances according to the topographical feature data of the water well entrances of the powerhouse, and generate distribution and configuration data of water level gauges at the water well entrances.

[0064] As an embodiment of the present invention, refer to Figure 2 As shown, Figure 1 Detailed implementation step flow chart of step S1 in the embodiment, step S1 in this embodiment includes:

[0065] Step S11: obtaining the physical construction parameters of the hydropower station plant;

[0066] In an embodiment of the present invention, physical construction parameters of a hydropower station building that are stored in a database or measured by a laser scanner, a total station, or other high-precision measuring tools are obtained, including but not limited to: the external structural dimensions (length, width, and height) of the hydropower station building; the height difference of each area inside the building, the position of the opening, the walls, doors, windows, and floor distribution; the installation position of turbines and other mechanical equipment; and the relative positions of key equipment such as drainage systems and seepage collection wells.

[0067] Step S12: performing three-dimensional modeling of the hydropower station building according to the physical construction parameters of the hydropower station building to generate a three-dimensional model of the hydropower station building;

[0068] In an embodiment of the present invention, a CAD software, a BIM (Building Information Model) tool or other suitable three-dimensional modeling software (such as AutoCAD, Revit, SketchUp, etc.) is used to establish a three-dimensional model of a hydropower plant building according to the physical construction parameters collected in step S11. A three-dimensional model is established for the external features such as the external contour, roof, and wall of the plant building, and each space in the plant building (such as the unit area, the operation room, the maintenance corridor, etc.) is modeled to accurately display the internal structure and equipment layout of the plant building. According to the actual measurement data, a three-dimensional model of related facilities such as drainage pipes and sealed drainage systems is established to ensure that all key hydraulic equipment and related systems are included in the model. All data (including building structure, equipment location, drainage system, etc.) are integrated into a comprehensive three-dimensional model to ensure that the model can fully reflect the physical characteristics of the hydropower plant building and its functional areas.

[0069] Step S13: performing terrain feature analysis of the powerhouse corridor and the powerhouse water well entrance respectively through the three-dimensional model of the hydropower plant building, and generating terrain feature data of the powerhouse corridor and the powerhouse water well entrance respectively;

[0070] In an embodiment of the present invention, a terrain analysis is performed using three-dimensional modeling software to determine the terrain changes, slopes, drainage performance, etc. of the factory corridor. The height difference of the corridor, the ground level, etc. are analyzed according to the three-dimensional model to generate terrain feature data of the corridor area, such as: the elevation distribution of the corridor: including the elevation of the bottom layer of the corridor, the height of the equipment installation point, etc. Drainage capacity analysis: Evaluate the drainage capacity of the corridor area and check potential water accumulation points or low-lying areas. Based on the three-dimensional model, a detailed analysis is performed on the water well entrance area to confirm the relative position of the water well mouth, the height difference with the surrounding environment, and other factors. By analyzing the terrain data of the water well mouth, the terrain feature data of the water well mouth is generated, such as: the relative elevation between the position of the water well mouth and the corridor and equipment. The entrance shape and drainage direction of the water well mouth. According to the above analysis, the terrain feature data of the factory corridor and the terrain feature data of the water well mouth are generated respectively to provide a reference for the subsequent water level meter distribution configuration.

[0071] Step S14: analyzing the accident protection height of the plant corridor according to the terrain feature data of the plant corridor, and generating accident protection height data of the plant corridor;

[0072] In the embodiment of the present invention, the accident protection height is determined by further analyzing the terrain feature data of the plant corridor. The accident protection height refers to the water level value that can trigger an alarm and start emergency protection measures when the water level rises to a certain height. : According to the terrain feature data of the plant corridor, the relative height of the lowest point of the corridor and the location of key equipment is identified, and the protection water level is set. Taking into account the water level changes, climatic factors and equipment operation status, a certain safety margin is set for the accident protection height to ensure that the plant can fully protect the equipment when encountering abnormal water level changes. For example, considering that the high-top oil pump must be put into use when the unit is shut down due to an accident, and the height of electrical equipment such as the distribution box and bearing oil pump at the corridor level is greater than the height of the high-top oil pump, the water level gauge alarm action value must be lower than the installation height of the high-top oil pump. According to the analysis results, the accident protection height data of the plant corridor is generated, and this data will be used for the subsequent installation of the water level gauge and water level alarm control.

[0073] Step S15: performing corridor water level gauge distribution configuration analysis according to the plant corridor terrain feature data and the plant corridor accident protection height data, and generating corridor water level gauge distribution configuration data;

[0074] In an embodiment of the present invention, the optimal layout position of the water level meter in the corridor is determined by analyzing the terrain characteristics and accident protection height data of the corridor, ensuring that the water level meter can monitor water level changes in real time, especially in key areas such as near equipment. According to the measurement accuracy and layout requirements of the water level meter, select a suitable type of water level meter (such as the Mike MDMH50 horizontal layout water level meter), and design multiple monitoring points according to the actual situation of the corridor to ensure that there are no dead angles. Reasonably set the spacing and height: determine the reasonable spacing between the water level meters to ensure that the water level meter can effectively cover the entire corridor area, and at the same time set the trigger point of the alarm signal according to the accident protection height data of the plant. Combined with the terrain characteristics and accident protection height data of the corridor, generate corridor water level meter distribution configuration data.

[0075] Step S16: Perform distribution and configuration analysis of water level gauges at the water well entrances according to the topographical feature data of the water well entrances of the powerhouse, and generate distribution and configuration data of water level gauges at the water well entrances.

[0076] In an embodiment of the present invention, the best position for arranging a water level gauge at the well entrance is determined by analyzing the topographical features of the well entrance, ensuring that the well mouth water level can be accurately monitored and potential flooding risks can be discovered in a timely manner. According to the elevation of the well mouth, equipment layout, and flood prevention requirements, a suitable type of water level gauge (such as a barreled float water level gauge) is selected. According to the topographical features of the well mouth, the installation position of the water level gauge is designed to ensure that all key well points are covered. Based on the analysis results, the distribution configuration data of the well mouth water level gauge is generated to provide specific layout guidance for the installation of the water level gauge.

[0077] Further, step S2 includes the following steps:

[0078] Step S21: configuring the corridor water level gauge for the Mack MDMH50 horizontally arranged water level gauge device through the corridor water level gauge distribution configuration data, and performing corridor water level monitoring processing through the configured Mack MDMH50 horizontally arranged water level gauge device to generate corridor water level monitoring data;

[0079] Step S22: configuring the barreled water wellhead water level gauge device through the water wellhead water level gauge distribution configuration data, and performing water wellhead water level monitoring processing through the configured barreled water wellhead water level gauge device to generate water wellhead water level monitoring data.

[0080] In the embodiment of the present invention, according to the actual situation of the corridor (such as spatial layout, environmental characteristics, etc.), a suitable water level meter device is selected: the Mack MDMH50 horizontally arranged water level meter is used, which is suitable for arrangement in a long corridor with a certain space. According to the distribution configuration data of the corridor water level meter, the precise installation position of each water level meter is determined. The layout of each water level meter should ensure that the water level changes of the entire corridor can be covered, especially those low-lying areas prone to water accumulation. The water level meter should usually be installed horizontally to ensure its accurate measurement. Determine the connection method of the equipment, such as power supply, signal transmission line, etc. The Mack MDMH50 water level meter device is installed at the designated location of the corridor. During installation, ensure that the water level meter device is parallel to the ground and maintain an appropriate safety interval with other equipment. Use professional installation tools to ensure that the water level meter is firmly installed, and check whether the connection between the device and the signal transmission line is normal. Configure the measurement range of the water level meter and set the minimum and maximum water level monitoring thresholds of the water level meter. For example, set the first-level alarm threshold of the water level meter to a certain water level height, and the second-level alarm threshold to another higher water level. After completing the equipment configuration, start the water level meter for real-time monitoring. The water level meter collects the corridor water level data in real time through its built-in sensor and transmits the data to the local control system (such as LCU). Through the data processing system, the monitored water level data is converted into corridor water level monitoring data, and the data is stored in the monitoring system to monitor the water level changes in real time. According to the actual situation of the wellhead, select the appropriate water level meter equipment. Here, a barrel-mounted wellhead water level meter is used. This water level meter is designed for special areas such as wellheads and can accurately monitor the water level changes in the well. The wellhead water level meter should be installed at a key position at the entrance of the well, usually close to the bottom of the wellhead, to ensure that the water level changes in the well can be accurately monitored. Ensure that the water level meter is kept at a certain distance from other facilities in the well (such as water pumps, drainage pipes, etc.) to avoid interference from the equipment. Install the barrel-mounted wellhead water level meter at the designated location of the wellhead. Ensure that the equipment is installed horizontally to avoid measurement errors caused by incorrect installation angles of the water level meter. Connect the sensor, signal transmission line and power supply to the water level meter equipment to ensure normal data transmission. Set the alarm thresholds for the water level gauge (such as the first and second alarm water levels). When the first alarm is triggered, a warning message is usually sent; when the second alarm is triggered, emergency protection measures are initiated. After installation, start the water level gauge for real-time monitoring. The device collects water level data at the wellhead through its built-in sensor. The monitoring data is sent to the control system in real time and processed to generate water level monitoring data at the wellhead for subsequent water level analysis and control decisions.

[0081] Specifically, taking the hydropower plant as the application scenario, the bottom plane of the corridor layer is the measurement reference plane, and the corridor water level gauge distribution configuration data is used to take the four units from left to right in the corridor layer as an example. Three water level gauges are arranged for each unit. Considering that the high-top oil pump must be put into use when the unit is shut down due to an accident, and the height of the corridor layer distribution box, bearing oil pump and other electrical equipment from the ground is greater than the height of the high-top oil pump, the water level gauge alarm action value must be lower than the installation height of the high-top oil pump to prevent damage to the unit during an accident shutdown. The unit water level gauge uses the Mack MDMH50 horizontally arranged water level gauge. The three water level gauges are arranged horizontally at the same height, 60 cm apart, and fixed by wall brackets. Taking the hydropower plant as the application scenario, three barreled float water level gauges are arranged at the entrance of the leakage collection well and the entrance of the maintenance collection well through the water well mouth water level gauge distribution configuration data.

[0082] Further, step S3 includes the following steps:

[0083] Step S31: monitoring the flow rate and pressure of the main shaft seal drainage pipe of the hydropower station building by using a contact-type immersion flow meter device to generate flow rate and pressure monitoring data;

[0084] Step S32: converting the flow rate and pressure monitoring data into flow rate electrical signals to generate flow rate electrical signal data;

[0085] Step S33: Performing real-time monitoring and drainage flow analysis on the flow electrical signal data through the local control unit to generate real-time monitoring drainage flow data;

[0086] Step S34: Execute drainage flow monitoring feedback operation based on real-time monitoring drainage flow data.

[0087] In the embodiment of the present invention, according to the characteristics of the main shaft seal drainage pipeline, a suitable contact flowmeter device is selected. The contact drop-in flowmeter can monitor the pressure change of the sensor by using the fluid flow when the water flows through. Select a suitable type such as a piezoresistive flowmeter or an electromagnetic flowmeter to ensure that it can accurately measure the flow rate and pressure of the water flow. The piezoresistive flowmeter detects the pressure change of the fluid and converts it into an electrical signal output. The flowmeter is usually installed at the inlet or outlet of the drainage pipeline to ensure that the changes in the water flow can be captured. According to the diameter, flow rate and water flow characteristics of the pipeline, ensure that the measurement area of ​​the flowmeter is in a stable flow state area, and avoid installing it in the pipeline elbow, valve or other areas that may interfere with the flow. The flowmeter needs to be connected to a power supply and ensure that the signal transmission line is connected to the local control unit (LCU). The flowmeter will monitor the pressure change of the water flow in real time, and calculate the actual flow data in combination with the flow characteristics of the fluid. Through the built-in sensor, the flowmeter will continuously collect flow and pressure data, convert it into an electrical signal, and transmit it to the subsequent processing system. The flowmeter sends the flow pressure monitoring data to the local control unit (LCU) in the form of a standard signal (such as a 4-20mA current signal or a digital signal) for subsequent data processing and feedback analysis. The raw data output by the flowmeter is usually an analog signal based on pressure changes. In order to facilitate subsequent data analysis and processing, these analog signals need to be converted to obtain standardized flow data. The pressure data of the flowmeter is converted into a flow electrical signal by using a linear algorithm. The linear algorithm converts the raw pressure signal into the corresponding flow data based on the calibration curve of the flowmeter. The linear algorithm usually uses a standard calibration function or a flow-pressure conversion model to map the pressure value to the flow value, and receives the raw pressure data from the flowmeter. The pressure signal is mathematically processed by the linear algorithm and converted into an electrical signal that is linearly related to the flow, generating flow electrical signal data, which can be directly used for subsequent monitoring and feedback by the local control unit (LCU). The LCU system is responsible for receiving data from the flowmeter and performing real-time analysis. The LCU usually communicates with other devices (such as PLC, SCADA system, etc.) to monitor various parameters in real time. LCU receives flow electrical signal data from the flow meter and processes the data according to the set threshold and control strategy. LCU analyzes the flow data in real time and calculates the real-time changes in the drainage flow. For example, analyze the trend of the flow data, whether there are abnormal fluctuations, whether it exceeds the preset safety threshold, etc. LCU converts the results of the analysis into real-time monitoring drainage flow data and stores it in the system for subsequent operational decisions and alarm triggering. Based on the real-time monitored drainage flow data, perform appropriate feedback control operations. The purpose of the feedback operation is to ensure that the drainage system can work normally at any time to avoid equipment damage or flooding risks due to abnormal drainage flow.When the real-time monitoring drainage flow data does not exceed the preset flow threshold, the system will perform regular flow signal feedback to maintain the normal operation of the drainage system. For example, when the flow data is normal, the working state of the drainage pump can be adjusted through the LCU to ensure stable drainage. When the real-time monitoring drainage flow data exceeds the preset flow threshold, it indicates that there may be a drainage fault or the water source exceeds the standard, and the system will perform abnormal flow signal feedback.

[0088] Furthermore, the drainage flow monitoring and feedback operation in step S34 includes the following steps:

[0089] When the real-time monitored drainage flow data is within the preset flow threshold, a normal flow signal feedback is performed; or, when the real-time monitored drainage flow data is above the preset flow threshold, an abnormal flow signal feedback is performed.

[0090] In the embodiment of the present invention, the identification signal of the flow meter in the drainage pipe from the main shaft seal to the gallery layer is fed back through real-time monitoring of the drainage flow data. The flow meter in the drainage pipe from the main shaft seal to the gallery layer does not participate in the shutdown control, but only monitors the water flow in the drainage pipe in real time. Once the numerical signal exceeds the set value, the marking color number in the monitoring will change from green to red and flash, reminding the operating personnel to deal with the defects as soon as possible and achieve the effect of early prevention of accidents.

[0091] Furthermore, the water level monitoring feedback control operation includes a first-level water level monitoring abnormal signal light feedback operation or a second-level water level alarm signal linkage control operation, and step S4 includes the following steps:

[0092] Step S41: performing water level monitoring feedback signal analysis on the water level monitoring data through the built-in distribution box relay of the water level monitoring device, wherein the built-in distribution box relay of the water level monitoring device includes a first signal node of the relay, a second signal node of the relay, a third signal node of the relay and a fourth signal node of the relay, including: when the water level monitoring data is less than the first water level monitoring threshold of the water level monitoring device, generating a conventional water level monitoring feedback signal; when the water level monitoring data is not less than the first water level monitoring threshold of the water level monitoring device and is less than the second water level monitoring threshold of the water level monitoring device, generating a first-level water level alarm signal through the first signal node of the relay; when the water level monitoring data is not less than the second water level monitoring threshold of the water level monitoring device, generating a second-level water level alarm signal through the second signal node of the relay, wherein the first water level monitoring threshold of the water level monitoring device is less than the second water level monitoring threshold of the water level monitoring device;

[0093] Step S42: When a first-level water level alarm signal is identified, a first-level water level monitoring abnormal signal light feedback operation is performed through the built-in distribution box indicator light of the water level monitoring device;

[0094] Step S43: When a secondary water level alarm signal is identified, a secondary water level alarm signal linkage control operation is executed.

[0095] Furthermore, in step S41, the second signal node of the relay is connected to the third signal node of the relay and the fourth signal node of the relay.

[0096] In an embodiment of the present invention, a water level monitoring feedback signal analysis is performed on the water level monitoring data through a distribution box relay built into the water level monitoring device, wherein the distribution box relay built into the water level monitoring device includes a first signal node of the relay, a second signal node of the relay, a third signal node of the relay, and a fourth signal node of the relay. For example, there are 8 relays in each distribution box, which correspond to the first and second alarm signals of the water level meter installed below the distribution box, respectively. Relay K1, relay K2, and relay K3 are respectively connected to the first signal node of the relay. When the first alarm signal is activated, the relay is energized, a yellow light is displayed on the distribution box panel, and a signal is sent to the monitoring system to alarm; relay K4, relay K5, and relay K6 are connected to the second signal node of the relay of the water level meter. To prevent the flooding of the plant protection signal, a hard-wired protection pressure plate is set on the monitoring LCU panel cabinet. It is closed when the unit is operating normally, and can be disconnected at any time as needed during unit maintenance. The third signal node of the relay and the fourth signal node of the relay are connected to relays K7 and K8 respectively. When any two of the leakage water collection well entrance door, the maintenance water collection well entrance door, and the second signal node of the relay of the unit are connected at the same time, relays K7 and K8 are energized. The auxiliary node of relay K8 functions as follows: turning on the red light on the distribution box panel, sending alarm information to the monitoring LCU and starting the voice alarm of the plant. Relay K8 can also be used to test the connection point of the water level meter. The auxiliary node of relay K7 turns on the LCU host protection (backup protection) and starts the voice alarm of the plant. The LCU main protection (backup protection) at the leakage sump entrance and the maintenance sump entrance can be delayed for 5 minutes before all units start the unit accident shutdown process. The on-duty personnel can cancel the protection process at any time in the monitoring system within 5 minutes; because the terrain of the leakage sump entrance and the maintenance sump entrance are generally in the low-lying area of ​​the corridor layer, which is more than 1.5m different from the terrain of the unit's top shaft oil pump, the water level gauge alarm value delay at the leakage sump entrance and the maintenance sump entrance can be set to 5 minutes, and the elevation of the water level gauge alarm node at the unit is very small compared to the installation elevation of the top shaft oil pump, so once the secondary alarm signal of the water level gauge is activated, the corresponding relays K8 and K7 are energized, and the monitoring LCU water machine main protection (backup protection) is activated, and the unit corresponding to the water level gauge of the unit immediately enters an emergency accident shutdown instead of a general accident shutdown. The flow meter in the drainage pipe from the main shaft seal to the gallery layer does not participate in the shutdown control, but only monitors the water flow in the drainage pipe in real time. Once the numerical signal exceeds the set value, the color code in the monitoring will change from green to red and flash, reminding the operating personnel to deal with defects as soon as possible and achieve the effect of preventing accidents in advance.

[0097] Furthermore, the secondary water level alarm signal linkage control operation in step S43 includes the following steps:

[0098] The third signal node of the relay connected to the second signal node of the relay performs a plant host protection operation on the local control unit;

[0099] The fourth signal node of the relay connected through the second signal node of the relay respectively executes the secondary water level monitoring abnormal alarm feedback for the local control unit and the secondary water level monitoring abnormal signal light feedback operation for the distribution box indicator light.

[0100] Furthermore, before executing the secondary water level alarm signal linkage control operation, step S43 includes setting a wellhead water level delay protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the wellhead water level monitoring data in the water level monitoring data through preset water level protection delay data.

[0101] In an embodiment of the present invention, the preset water level protection delay data can be set to 1 minute, 5 minutes or ten minutes, etc. For example, the LCU main unit protection (backup protection) at the leakage collection well entrance door and the maintenance collection well entrance door can be delayed for 5 minutes, and all units will start the unit accident shutdown process again. The on-duty personnel can cancel the protection process at any time in the monitoring system within 5 minutes; because the terrain of the leakage collection well entrance door and the maintenance collection well entrance door is generally in the low-lying area of ​​the corridor layer, which is more than 1.5m different from the terrain of the unit's top shaft oil pump, the water level gauge alarm value delay at the leakage collection well entrance door and the maintenance collection well entrance door can be set to 5 minutes.

[0102] Furthermore, before executing the secondary water level alarm signal linkage control operation, step S43 includes setting the gallery water level instant protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the gallery water level monitoring data in the water level monitoring data.

[0103] In the embodiment of the present invention, the elevation of the water level gauge alarm node at the unit is very close to the installation elevation of the top shaft oil pump, so once the secondary alarm signal of the water level gauge is activated, the corresponding relays K8 and K7 are energized, and the monitoring LCU water machine main protection (backup protection) is activated, and the unit corresponding to the water level gauge of the unit immediately enters an emergency shutdown instead of a general accident shutdown.

[0104] The beneficial effect of this application is that the physical construction parameters and terrain characteristics of the hydropower plant can be fully considered through three-dimensional modeling analysis, an accurate three-dimensional model of the plant can be generated, and the distribution and configuration of the water level gauge can be analyzed in combination with key locations such as corridor terrain and well entrances. This pre-analysis and modeling process enables the water level gauge to be scientifically and reasonably arranged at key monitoring points, such as corridors and wellheads, so as to achieve more comprehensive and accurate water level monitoring and significantly improve the prevention capability of flooded plants. Through the configuration of the Mack MDMH50 horizontally arranged water level gauge and the barreled wellhead water level gauge, the corridor water level and the wellhead water level are monitored in real time respectively. The two types of water level gauges are used in combination and complement each other to ensure the comprehensive monitoring and response capability of water level changes in different areas of the hydropower station. In particular, the monitoring of wellheads can effectively prevent flooding and reduce the risk of equipment flooding. Through the contact-type drop-in flowmeter device, the water flow changes of the main shaft seal drainage pipeline are monitored in real time. The device converts flow data into standard electrical signals through flow and pressure monitoring, and transmits them to the local control unit (LCU) for real-time analysis, so that the hydropower station can detect abnormal drainage flow in time and avoid flooding accidents caused by insufficient drainage, thereby improving the safety level of the plant. The monitoring data is optimized and processed by a linear algorithm, and the data is fed back and analyzed by the local control unit to ensure the accuracy and processing efficiency of real-time data. This precise data optimization and feedback mechanism enables the hydropower station to make timely decisions based on higher-quality data, thereby improving the protection capability of the plant. Through the real-time collection and processing of flow, pressure and water level data, it can respond quickly and take corresponding measures. When the flow or water level is abnormal, the system can quickly analyze the data and respond, greatly improving the response speed of the hydropower station to emergencies and reducing the dependence on human intervention. The local control unit analyzes the drainage flow in real time, combined with the set flow threshold, and the system can intelligently determine whether there is a drainage problem. If the monitored drainage flow exceeds the preset threshold, the system will immediately feedback the abnormal flow signal and start the processing program. This feedback control mechanism ensures the precise scheduling of the drainage system by the hydropower station and reduces the occurrence of equipment failures or unexpected shutdowns. The relay in the distribution box can automatically adjust the feedback signal according to the water level monitoring data and automatically trigger the preset control strategy. When the water level reaches the first-level alarm threshold, the relay will send out a first-level alarm signal and feedback through the indicator light to notify the staff. If the water level exceeds the second-level alarm threshold, the system will perform emergency linkage control operations, start the plant host protection and other protection measures, thereby effectively preventing the expansion of flooding accidents. Combining the first-level water level monitoring abnormal signal light feedback and the second-level water level alarm signal linkage control, it can immediately issue an alarm when the water level exceeds the preset threshold, and remind the staff through indicator lights and voice alarms. This multi-level, hierarchical alarm mechanism ensures that the hydropower station can take timely action when there is a risk of flooding.Through the delayed protection mechanism of the water level monitoring data at the wellhead, a reasonable reaction time is provided when the water level rises to avoid misoperation or overreaction. The delay mechanism can buy more inspection and judgment time for the on-duty personnel, reduce unnecessary downtime, and effectively avoid the waste of equipment downtime due to false alarms. For the corridor water level monitoring data, the system is equipped with an immediate protection mechanism. Once the water level exceeds the preset secondary alarm threshold, the system will immediately start the emergency shutdown process to minimize the losses caused by flooding. Through technical means such as multi-point linkage water level monitoring, drainage flow monitoring and feedback control, the safety of the hydropower plant has been greatly improved. Through precise water level monitoring, flow control and intelligent alarm, the hydropower station can effectively warn and intervene before the flooding accident occurs, minimize the damage caused by the risk of flooding to the equipment, and improve the reliability and service life of the equipment. The multi-level linkage protection method adopted reduces human operation errors and improves the level of automated management of the plant through automated monitoring, alarm and feedback mechanisms. Based on the intelligent decision support system of real-time data, the hydropower station can make adaptive adjustments under various working conditions, optimize equipment operation, and ensure the safe and stable operation of the plant. Therefore, the multi-level linkage protection method for preventing plant flooding of the present invention is based on the technology of hierarchical and classified multi-measurement points, analyzes the water source environment, measurement method, and accident alarm level of the hydropower station corridor, and designs a set of multi-point linkage protection scheme for preventing plant flooding that meets the maximum economic benefits of the hydropower station and is safe and reliable according to the data of four measurement points such as the flow rate of the main shaft sealing drainage pipe, the leakage collection well entrance door, the maintenance collection well entrance door, and the corridor ground water level.

[0105] Therefore, the embodiments should be regarded as illustrative and non-restrictive from all points, and the scope of the present invention is limited by the appended claims rather than the above description, and it is therefore intended that all changes falling within the meaning and range of equivalent elements of the application documents are included in the present invention.

[0106] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be 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 the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A multi-level linkage protection method for preventing flooding of factory buildings, characterized in that: The following steps are involved: Step S1: obtaining the physical construction parameters of the hydropower plant building; performing three-dimensional modeling of the hydropower plant building according to the physical construction parameters of the hydropower plant building to generate a three-dimensional model of the hydropower plant building; performing water level gauge distribution configuration analysis according to the three-dimensional model of the hydropower plant building to generate water level gauge distribution configuration data, wherein the water level gauge distribution configuration data includes corridor water level gauge distribution configuration data and wellhead water level gauge distribution configuration data; Step S2: Performing water level monitoring processing on the water level meter equipment through the water level meter distribution configuration data to generate water level monitoring data, wherein the water level meter equipment is respectively a Mack MDMH50 horizontally arranged water level meter equipment and a barreled wellhead water level meter equipment, and the water level monitoring data includes corridor water level monitoring data and wellhead water level monitoring data; Step S3: Real-time monitoring and drainage flow analysis is performed on the main shaft seal drainage pipe of the hydropower station building by using a contact-type flow meter device to generate real-time monitoring drainage flow data; and drainage flow monitoring feedback operations are performed based on the real-time monitoring drainage flow data; Step S4: performing water level monitoring feedback control operations on the water level monitoring data through the built-in distribution box relay of the water level monitoring device.

2. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 1 is characterized in that: Step S1 includes the following steps: Step S11: obtaining the physical construction parameters of the hydropower station plant; Step S12: performing three-dimensional modeling of the hydropower station building according to the physical construction parameters of the hydropower station building to generate a three-dimensional model of the hydropower station building; Step S13: performing terrain feature analysis of the powerhouse corridor and the powerhouse water well entrance respectively through the three-dimensional model of the hydropower plant building, and generating terrain feature data of the powerhouse corridor and the powerhouse water well entrance respectively; Step S14: analyzing the accident protection height of the plant corridor according to the terrain feature data of the plant corridor, and generating accident protection height data of the plant corridor; Step S15: performing corridor water level gauge distribution configuration analysis according to the plant corridor terrain feature data and the plant corridor accident protection height data, and generating corridor water level gauge distribution configuration data; Step S16: Perform distribution and configuration analysis of water level gauges at the water well entrances according to the topographical feature data of the water well entrances of the powerhouse, and generate distribution and configuration data of water level gauges at the water well entrances.

3. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 1 is characterized in that: Step S2 includes the following steps: Step S21: configuring the corridor water level gauge for the Mack MDMH50 horizontally arranged water level gauge device through the corridor water level gauge distribution configuration data, and performing corridor water level monitoring processing through the configured Mack MDMH50 horizontally arranged water level gauge device to generate corridor water level monitoring data; Step S22: configuring the barreled water wellhead water level gauge device through the water wellhead water level gauge distribution configuration data, and performing water wellhead water level monitoring processing through the configured barreled water wellhead water level gauge device to generate water wellhead water level monitoring data.

4. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 1 is characterized in that: Step S3 includes the following steps: Step S31: performing flow and pressure monitoring processing on the main shaft seal drainage pipe of the hydropower station plant by using a contact-type immersion flow meter device to generate flow and pressure monitoring data; Step S32: converting the flow rate and pressure monitoring data into flow rate electrical signals to generate flow rate electrical signal data; Step S33: Performing real-time monitoring and drainage flow analysis on the flow electrical signal data through the local control unit to generate real-time monitoring drainage flow data; Step S34: Execute drainage flow monitoring feedback operation based on real-time monitoring drainage flow data.

5. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 4 is characterized in that: The drainage flow monitoring and feedback operation in step S34 includes the following steps: When the real-time monitored drainage flow data is within the preset flow threshold, a normal flow signal feedback is performed; or, when the real-time monitored drainage flow data is above the preset flow threshold, an abnormal flow signal feedback is performed.

6. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 1 is characterized in that: The water level monitoring feedback control operation includes a first-level water level monitoring abnormal signal light feedback operation or a second-level water level alarm signal linkage control operation, and step S4 includes the following steps: Step S41: performing water level monitoring feedback signal analysis on the water level monitoring data through the built-in distribution box relay of the water level monitoring device, wherein the built-in distribution box relay of the water level monitoring device includes a first signal node of the relay, a second signal node of the relay, a third signal node of the relay and a fourth signal node of the relay, including: when the water level monitoring data is less than the first water level monitoring threshold of the water level monitoring device, generating a conventional water level monitoring feedback signal; when the water level monitoring data is not less than the first water level monitoring threshold of the water level monitoring device and is less than the second water level monitoring threshold of the water level monitoring device, generating a first-level water level alarm signal through the first signal node of the relay; when the water level monitoring data is not less than the second water level monitoring threshold of the water level monitoring device, generating a second-level water level alarm signal through the second signal node of the relay, wherein the first water level monitoring threshold of the water level monitoring device is less than the second water level monitoring threshold of the water level monitoring device; Step S42: When a first-level water level alarm signal is identified, a first-level water level monitoring abnormal signal light feedback operation is performed through the built-in distribution box indicator light of the water level monitoring device; Step S43: When a secondary water level alarm signal is identified, a secondary water level alarm signal linkage control operation is executed.

7. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 6 is characterized in that: In step S41, the relay second signal node is connected to the relay third signal node and the relay fourth signal node.

8. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 7 is characterized in that: The secondary water level alarm signal linkage control operation in step S43 includes the following steps: The third signal node of the relay connected to the second signal node of the relay performs a plant host protection operation on the local control unit; The fourth signal node of the relay connected through the second signal node of the relay respectively executes the secondary water level monitoring abnormal alarm feedback for the local control unit and the secondary water level monitoring abnormal signal light feedback operation for the distribution box indicator light.

9. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 6 is characterized in that: Before executing the secondary water level alarm signal linkage control operation, step S43 includes setting a wellhead water level delay protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the wellhead water level monitoring data in the water level monitoring data through preset water level protection delay data.

10. The multi-level linkage protection method for preventing factory buildings from flooding according to claim 6, characterized in that: Before executing the secondary water level alarm signal linkage control operation, step S43 includes setting the gallery water level instant protection mechanism for the secondary water level alarm signal linkage control operation corresponding to the gallery water level monitoring data in the water level monitoring data.

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