Substation flood control detection system

Abstract

The invention relates to the technical field of safety protection of transformer substations, and discloses a transformer substation flood control detection system which comprises a passive flood control barrier subsystem which comprises a detachable pressing type flood control baffle unit and a one-way drainage check valve and is used for physically preventing external flood from flowing backwards; the flood situation detection and active drainage subsystem comprises an accumulated water collection unit, a detection sensing unit, a drainage execution unit and an intelligent control unit, and the intelligent control unit responds to the water level obtained by the detection sensing unit and automatically controls the drainage execution unit to execute drainage; and the auxiliary safety protection subsystem is used for providing operation guarantee and personnel safety protection. Through cooperative work of the three subsystems, a three-in-one layered defense system of physical barrier, active drainage and safety guarantee is constructed, and the system has the beneficial effects of high reliability, high error-tolerant rate, intelligent fine management and the like.

Description

Technical Field

[0001] This invention relates to the field of substation safety protection technology, specifically a substation flood prevention detection system. Background Technology

[0002] Currently, substations are the core hubs of the power system, housing a large number of electrical equipment, much of which is located in low-lying areas such as cable trenches. The safe operation of substations is crucial to the stability of the power grid. Floods often cause water accumulation in substations, leading to short circuits or insulation damage, and resulting in widespread power outages. Therefore, ensuring the safety of substations during the flood season is a critical issue in power operation and maintenance.

[0003] To address the aforementioned issues, existing technologies offer several protective measures. One is passive physical barriers, such as piling sandbags or installing waterproof barriers at the substation entrance and sealing the pipe openings. Another is the installation of automatic drainage devices, typically involving submersible pumps and float switches installed in a sump; when the water level reaches a predetermined height, the pump automatically starts to drain the water.

[0004] However, the aforementioned existing technologies have shortcomings in application. Various protective measures are often isolated from each other; physical containment and automatic drainage lack functional coordination; and auxiliary safeguards such as the safety of materials and personnel are often neglected. Furthermore, existing drainage devices have low reliability and fault tolerance. They mostly use a single sensor and pump configuration, making them prone to single-point failures, and lack redundancy and fault isolation mechanisms. In addition, the drainage control logic is too simple and crude. Control based on float switches can only achieve on / off switching, unable to provide multi-level early warnings, nor can it allocate drainage power in stages according to the urgency of the water level, and it is also difficult to completely remove shallow water accumulation in cable trenches.

[0005] Therefore, the present invention provides a substation flood control detection system to address the shortcomings of the prior art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a substation flood control detection system, which solves the problems of existing substation flood control measures, such as the isolation and lack of coordination between passive containment and active drainage systems, and the low reliability of drainage systems due to their simple configuration and control logic, which are prone to single-point failures.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a substation flood control detection system, comprising: a passive flood barrier subsystem, a flood monitoring and active drainage subsystem, and an auxiliary safety protection subsystem.

[0008] The passive flood barrier subsystem includes a detachable, compressible flood baffle unit and a one-way drainage check valve to physically prevent backflow of external floodwater. The flood monitoring and active drainage subsystem includes a water collection unit, a detection sensor unit, a drainage execution unit, and an intelligent control unit. The detection sensor unit monitors the water level in the water collection unit in real time, and the intelligent control unit is configured to automatically control the drainage execution unit to perform drainage based on a preset closed-loop logic, responding to the water level data acquired by the detection sensor unit. The auxiliary safety protection subsystem provides operational support and personnel safety protection during the operation of the passive flood barrier subsystem and the flood monitoring and active drainage subsystem.

[0009] By adopting the above technical solutions, and utilizing a layered defense architecture that combines passive physical blocking with active intelligent drainage, along with auxiliary safety facilities, this system can comprehensively ensure the safety of substations during the flood season. The passive subsystem constructs the first line of defense through baffles and check valves to block external floods; the active subsystem uses closed-loop control logic to handle internal water accumulation in real time and prevent flooding; and the auxiliary subsystem ensures the survivability of equipment and the safety of personnel operating in extreme environments.

[0010] Preferably, the passive flood barrier subsystem further includes a cable trench outlet waterproof sealing unit, which is configured to seal the cable outlet hole.

[0011] By adopting the above technical solution, the gaps in the cable conduit holes can be sealed, effectively preventing groundwater or external water from seeping into the cable trench inside the station along the conduit hole path.

[0012] Preferably, the intelligent control unit is configured to execute a tiered alarm and response logic: continuously receive water level data and compare it with a preset first threshold and a second threshold, wherein the first threshold is a warning water level and the second threshold is a danger water level; when the water level is detected to reach the first threshold, a first-level alarm operation is executed, an alarm message is sent through the communication network and a remote intervention command is awaited; when the water level is detected to reach the second threshold, a second-level alarm operation is executed and a start command is automatically sent to the drainage execution unit to perform forced drainage.

[0013] By adopting the above technical solutions, the system can take differentiated response strategies according to the level of danger. In low-risk situations, manual judgment is introduced to prevent accidental action, while in high-risk situations, automated and real-time response is achieved to ensure the timeliness of drainage.

[0014] Preferably, the drainage execution unit is equipped with a main pump and a standby pump within the same water collection unit, and the intelligent control unit is further configured to execute a phased start-up logic: after triggering the secondary alarm operation, the main pump is started first; after the main pump is started, the water level change trend is continuously monitored, and if the water level is not dropped or the drainage demand exceeds the rated flow of the main pump, the standby pump is automatically started to increase the drainage volume.

[0015] By adopting the above technical solution, the system can dynamically adjust the drainage power according to the real-time rainfall intensity and drainage effect, which not only meets the energy-saving operation requirements, but also can cope with the instantaneous large flow drainage requirements under extreme rainstorm conditions.

[0016] Preferably, the water collection unit includes a dedicated water collection well for indoor cable trenches, and the drainage execution unit includes a flat-bottomed suction pump installed in the dedicated water collection well for indoor cable trenches; the intelligent control unit is configured with specific shutdown logic for the flat-bottomed suction pump: after detecting that the water has been drained, the control unit controls the flat-bottomed suction pump to continue running for a preset time and then automatically shuts it down.

[0017] By adopting the above technical solutions, it is possible to ensure that residual water at the bottom of the trench and pump can be completely drained in shallow water environments of indoor cable trenches, preventing cables from getting damp due to long-term accumulation of trace amounts of water.

[0018] Preferably, the intelligent control unit includes a system master station and a local intelligent terminal; the system master station is configured to provide a remote human-machine interface, allowing maintenance personnel to remotely issue intervention commands, and the intelligent control unit responds to the intervention commands by prioritizing the start and stop of the drainage execution unit; the local intelligent terminal is configured to independently execute water level detection, alarm judgment, and automatic start and stop logic of the water pump when communication with the system master station is interrupted.

[0019] By adopting the above technical solution, a two-layer control architecture was constructed to ensure that even in extreme scenarios where remote communication is paralyzed due to disasters, the system can still maintain its core automatic detection and flood discharge functions by relying on local logic.

[0020] Preferably, the flood monitoring and active drainage subsystem is divided into multiple independent drainage zones; each independent drainage zone is equipped with an independent water collection unit, a detection and sensing unit, an intelligent control unit, and a drainage execution unit; the intelligent control unit of each zone independently collects local water levels and makes decisions.

[0021] By adopting the above technical solutions, the system achieves regional autonomy, physically and logically isolating the risk of equipment failure or control failure in a single area, and avoiding the paralysis of the entire flood control system due to local failures.

[0022] Preferably, the detection sensing unit adopts a dual-mode redundancy design, including a continuous liquid level sensor and a switch-type water level probe; the intelligent control unit is configured to compare the data of the two sets of sensors simultaneously, and when the water level data detected by either set of sensors reaches the dangerous water level threshold, the start-up logic of the drainage execution unit is triggered.

[0023] By adopting the above technical solution and using heterogeneous sensors as backups for each other, the risk of failure to activate caused by single-point sensor failure or drift is eliminated, and the reliability of high water level triggering is improved.

[0024] Preferably, the water collection unit includes an outdoor water storage tank, and the drainage execution unit includes a submersible pump set installed in the outdoor water storage tank; the operation logic of the submersible pump set is managed by the intelligent control unit, and the submersible pump set automatically stops operating when the water level is detected to drop to a preset safe water level.

[0025] By adopting the above technical solution, automatic closed-loop management of drainage operations is achieved, preventing water pumps from being damaged due to dry running.

[0026] Preferably, the auxiliary safety protection subsystem includes: a unit for raising and waterproofing the gate control motor of the substation gate; an emergency small door unit installed on the substation gate to provide personnel passage when the gate control motor fails; a flood season safety passage unit to guide maintenance personnel to pass safely; and a dedicated flood control sandbox unit for standardized storage of flood control materials.

[0027] By adopting the above technical solutions, the survival problem of flood control facilities in flooded environments has been solved, and reliable physical access and material support have been provided for emergency rescue personnel, thereby improving the overall combat effectiveness of the system.

[0028] This invention provides a substation flood prevention detection system. It has the following beneficial effects: 1. This invention constructs a layered defense system that combines a passive flood barrier subsystem, a flood monitoring and active drainage subsystem, and an auxiliary safety protection subsystem, thereby achieving physical barrier flood control, flood detection, and active drainage. The system first uses detachable, pressurized flood barriers and one-way drainage check valves to prevent external flooding at its source. When water accumulates within the substation, the flood monitoring and active drainage subsystem automatically responds and executes forced drainage, while the auxiliary safety protection subsystem ensures electrical and personnel safety during this process. This design overcomes the limitations of traditional single-channel drainage, achieving a combination of prevention and drainage, thus enhancing the substation's comprehensive flood control capabilities.

[0029] 2. This invention divides the flood monitoring and active drainage subsystem into multiple independent drainage zones and utilizes intelligent control units to achieve zone autonomy and fault isolation, ensuring that equipment failure or communication interruption in any zone does not affect the independent flood drainage function of other zones. Combined with the dual-mode redundancy design of the detection sensor unit and the primary and backup pump configuration of the drainage execution unit, this invention eliminates single points of failure at both the architectural and component levels, ensuring highly reliable system operation under extreme disasters.

[0030] 3. This invention achieves intelligent and refined drainage management. The intelligent control unit, through a tiered handling logic based on warning and danger water levels, enables an orderly response from a level-one alarm to automatic forced drainage. During the automatic forced drainage phase, the intelligent control unit dynamically matches drainage capacity based on real-time water levels by activating the main pump and subsequently adding backup pumps in stages. Simultaneously, submersible pump sets and flat-bottomed suction pumps for cable trenches are configured for different operating conditions of outdoor water storage tanks and indoor cable trench collection wells, achieving scenario-based and precise handling of different types of water accumulation and improving drainage efficiency. Attached Figure Description

[0031] Figure 1 This is a system architecture diagram of the present invention; Figure 2 This is a flowchart of the method of the present invention; Figure 3 This is a functional structure diagram of the passive flood barrier subsystem of the present invention; Figure 4 This is a functional structure diagram of the intelligent flood detection and active drainage subsystem of the present invention; Figure 5 This is a functional structure diagram of the auxiliary safety and protection subsystem of the present invention. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See attached document Figure 1 This invention provides a high-reliability flood control monitoring system for substations, which may include: a passive flood barrier subsystem, a flood monitoring and active drainage subsystem, and an auxiliary safety protection subsystem. These three subsystems work together physically and functionally to construct a layered, zoned, and automated flood control system.

[0034] The passive flood barrier subsystem is the first line of physical defense for a substation. Specifically, this subsystem includes a detachable, compressible flood barrier unit installed at the substation gate. This unit consists of a high-strength aluminum alloy (such as 6063-T5 aluminum alloy) baffle, EPDM (ethylene propylene diene monomer) seals, and 304 stainless steel fasteners. The subsystem also includes one-way check valves installed at the drainage pipe outlets of the substation perimeter wall and at the water grates inside the substation, as well as a high-polymer waterproof seal for the cable trench outlet pipes. The function of this passive flood barrier subsystem is to, during a flood, use its physical structure to prevent external floodwaters from flowing back into the substation to the greatest extent possible.

[0035] The flood monitoring and active drainage subsystem is the substation's second line of defense and core response unit. This subsystem includes: a water collection unit for collecting accumulated water within the substation (specifically, outdoor water storage tanks and dedicated collection wells in the cable trenches of the high-voltage room); a detection sensing unit for real-time water level acquisition (specifically, redundantly configured water level sensors); a drainage execution unit for forced drainage (specifically, submersible pump sets configured in the water storage tanks and flat-bottomed suction pumps configured in the collection wells); and an intelligent control unit for achieving automated control (specifically, the system master station, pump control box, and intelligent terminal).

[0036] The operating logic of the flood monitoring and active drainage subsystem is as follows: the detection sensor unit monitors the water level in the water collection unit in real time. When the water level reaches the preset warning level, the intelligent control unit sends a level one alarm and notifies the maintenance personnel. When the water level reaches the preset danger level, the intelligent control unit automatically activates the drainage execution unit for forced drainage. This subsystem is designed for independent zone control, meaning that each water collection unit and its corresponding sensing, control, and execution units constitute an independent drainage area, ensuring that a failure in one area does not affect the flood discharge function of other areas.

[0037] The auxiliary safety protection subsystem enhances the system's reliability, maintainability, and personnel safety under extreme flood conditions. This subsystem specifically includes: a unit for raising and waterproofing the gate control motor of the substation gate; an emergency access gate unit installed on the gate; guardrails, reflective route indicators, and anti-slip steps for safe personnel passage; and a dedicated flood control sandbag unit for the standardized storage of flood control materials. This sandbag unit features a rainproof top cover and a bottom drainage structure to keep the sandbags dry and easily accessible.

[0038] See attached document Figure 2 The overall working principle of the system of this invention is based on a strategy that combines layered defense, regional autonomy, and closed-loop control. This principle ensures that the system can perform corresponding protection or response actions at different stages of flooding.

[0039] Before or in the early stages of flooding, the system primarily relies on a passive flood barrier subsystem for the first layer of physical protection. Specifically, compression-type flood barriers installed at the substation gate (e.g., composed of 6063-T5 aluminum alloy barriers, EPDM seals, and 304 stainless steel fasteners) form a physical barrier after installation. Simultaneously, one-way check valves installed at the drainage pipe outlets of the perimeter wall and the water grates within the substation automatically close when the external water pressure (backflow) exceeds the internal water pressure, preventing floodwater from flowing back along the pipe network. Waterproof sealing of the cable trench outlets prevents groundwater infiltration.

[0040] When external rainfall or a breach in the first line of defense (e.g., flooding over the barriers) causes water accumulation within the station, the flood monitoring and active drainage subsystem is activated, executing the second layer of active protection and closed-loop control. Detection and sensing units (e.g., two redundantly configured water level sensors) deployed within the water collection unit (e.g., an outdoor reservoir measuring 4000x1800x1000mm, or an indoor cable trench collection well measuring 400x400x400mm) collect water level data in real time.

[0041] The intelligent control unit (located in the water pump control box or as a stand-alone terminal) continuously receives water level data and compares it with two preset thresholds: the first threshold (warning water level) and the second threshold (dangerous water level).

[0042] When the detected water level reaches the first threshold (warning level), the intelligent control unit executes a level one alarm operation: it sends an alarm message to the system master station located in the main control room via the local area network and sends an SMS alarm to the preset maintenance personnel's terminals. In this state, the system awaits remote intervention from maintenance personnel through the monitoring backend, such as remotely starting the water pump.

[0043] When the detected water level continues to rise and reaches the second threshold (danger level), the intelligent control unit executes a level-two alarm operation. Simultaneously, without manual intervention, it automatically sends a start command to the drainage execution unit (pump control box) to control the water pump (e.g., rated power 1.1kW, rated flow 10m³ / h). 3 The submersible pump (with a capacity of / h) is used to start drainage.

[0044] In one embodiment, the automatic start-up logic is phased: the intelligent control unit first starts the first water pump; if the water level does not drop or the drainage demand exceeds the rated flow of a single water pump, the second (standby) water pump in the same collection unit is automatically started to increase the drainage volume. When the water level drops to a preset safe level (below a first threshold) after drainage, the control unit automatically stops the water pump, completing one closed-loop drainage operation.

[0045] The working principle of this invention also includes zoned autonomy. The system is physically divided into multiple (e.g., four) independent drainage zones, including three outdoor water storage tank drainage zones and one high-voltage room cable trench drainage zone.

[0046] Each drainage zone is equipped with its own independent water collection unit, detection and sensing unit, intelligent control unit (terminal), and drainage execution unit (pump). The four drainage systems adopt independent zone control, and the control logic of each zone (including water level detection, alarm, and automatic start / stop) operates independently. This design ensures that if the sensing or control equipment in any zone (e.g., the first reservoir) fails, the fault is isolated within that zone and will not affect the normal flood discharge function of the other three drainage zones.

[0047] Throughout all the above processes, the auxiliary safety protection subsystem provides a third layer of continuous operational assurance. For example, the elevation and waterproofing of the gate control motors at the substation gates ensure the electrical safety of the motors during the operation of the active drainage system (at which point the gate is sealed with a barrier). Emergency access gates ensure that personnel can still enter the station when the central control gate cannot be opened due to power failure or malfunction. Flood season safety passage units (e.g., small bridge railings, route signs) and dedicated flood control sandboxes (equipped with rainproof covers and drainage holes) provide safety and material support for manual inspections and emergency response.

[0048] See attached document Figure 3 The passive flood barrier subsystem includes a gate-type flood barrier unit installed at the entrance of the substation. This unit is a detachable and stackable physical barrier structure, mainly composed of a fixed frame system and a detachable barrier system.

[0049] The fixed frame system includes a frame pre-installed on the passageway pillars on both sides of the substation gate and a ground track pre-embedded in the entrance ground. In one embodiment, the frame is made of 6063-T5 aluminum alloy, extruded and integrally formed, with dimensions (length × width × thickness) of 103mm × 78mm × 6mm, and the surface is treated with sandblasting, electrophoresis, and oxidation. The ground track is made of 304 stainless steel, with dimensions (depth × width × wall thickness) of 60mm × 50mm × 1.5mm.

[0050] The detachable baffle system comprises multiple stackable baffle panels. Each baffle panel is integrally extruded from 6063-T5 aluminum alloy, with dimensions (height × thickness × wall thickness) of 215mm × 50mm × 2.2mm. The material has a yield strength (Rp0.2) of not less than 110MPa and a tensile strength of not less than 160MPa. The baffle panels are designed as hollow structures with integrally molded caps at both ends.

[0051] The sealing structure of this unit consists of multiple parts. The individual baffle pieces are connected by slots, each equipped with an EPDM (ethylene propylene diene monomer) waterproof sealing strip. The bottommost baffle piece, where it contacts the ground (ground rail), has an additional thickened (e.g., 25mm thick) waterproof strip to ensure a tight fit with the ground rail. The contact surfaces between the baffle and the side frames are also sealed using EPDM seals.

[0052] The unit's mounting system comprises several components. During installation, pressure is applied via a top pressing device and side-pressing screws (e.g., made of 304 stainless steel) to ensure a tight fit between the baffle system, the mounting frame system, and the ground rails. To cope with water pressure during high water levels, the system is also equipped with a reinforcing support rod. This reinforcing support rod (e.g., a 50mm x 50mm 304 stainless steel square tube) has one end abutting against the back of the baffle and the other end fixed to the ground via a back-support in-ground screw, forming a back support structure.

[0053] After the unit is assembled and compacted, its total permeability (including the water between baffles, between baffles and the two side columns, and between baffles and the bottom rail) shall not exceed 10L / hour·m² when subjected to the highest designed water-blocking height.

[0054] The passive flood control barrier subsystem also includes a unidirectional backflow prevention unit for the substation's pipeline network. This unit consists of various types of blocking devices, which are deployed at various pipeline network nodes connecting the substation to the outside.

[0055] The station area pipeline network one-way backflow prevention unit includes one or more drainage pipe outlet check valves.

[0056] The check valve is installed at the final discharge point of the substation's overall drainage network (including rainwater and sewage), i.e., at the interface between the end of the network and the external river or municipal network.

[0057] In one embodiment, the check valve is a purely mechanical valve that operates automatically based on fluid pressure differential, such as a flap check valve. The valve includes a valve body fixed to the outlet face of the pipeline network and a valve cover (flap valve) connected by a hinge.

[0058] Under normal operating conditions (drainage from inside the station to outside), the water flow pressure in the station's pipe network is greater than the water level pressure in the external river channel. The kinetic energy and static pressure of the water flow push open the valve cover, allowing the drainage to be discharged.

[0059] During the flood season (external flood backflow), the water level in the external river is higher than the outlet of the internal pipeline network, and the external water pressure is greater than the internal water pressure. This external pressure presses the valve cover tightly against the sealing surface of the valve body, forming a physical blockage and preventing external floodwater from flowing back into the substation through the drainage network.

[0060] The station area pipeline network one-way backflow prevention unit also includes one or more in-station water grate check valves.

[0061] The check valve is installed at the drainage outlets in areas such as the substation grounds and high-voltage rooms, specifically below the ground grates. This unit is used to prevent floodwater from flowing back into the substation via the pipeline network (e.g., bypassing the outlet check valve or from other pipelines) and overflowing through the substation grates.

[0062] In one embodiment, the check valve is a buoyancy-driven valve integrated into a grate cover or a pipe interface below it. The unit includes a grate cover, a valve body chamber, and a buoyancy seal (e.g., a hollow float or a low-density float) disposed within the chamber.

[0063] Under normal operating conditions (ground drainage), the buoyancy seal is located at the bottom of the chamber due to gravity, the drainage channel is unobstructed, and rainwater from the ground flows into the drainage network through the grating cover.

[0064] During the flood season, when floodwaters flow back into the pipeline and the water level rises to the chamber of the unit, the buoyancy of the water pushes the buoyancy seal upward until it tightly seals the upper outlet of the valve body chamber (i.e., the lower channel of the water grate), thereby cutting off the backflow path and preventing floodwaters from flowing out of the ground drainage outlet.

[0065] The station area pipeline network unidirectional backflow prevention unit also includes one or more cable trench outlet waterproof sealing units.

[0066] This unit is a static sealing structure installed at the cable outlet of the substation's indoor cable trench or outdoor cable well, connecting it to the outside environment. It seals the gap between the cable (or fiber optic cable) and the conduit wall, preventing external floodwater or groundwater from seeping or flowing back into the substation's cable trench system.

[0067] In one embodiment, the waterproof sealing unit employs a modular flexible sealing system. This system includes multiple compressible sealing modules (e.g., made of EPDM rubber or a polymer), a clamping plate, and fastening bolts.

[0068] During installation, sealing modules of different specifications are combined and wrapped around the cable according to the cable diameter and the pipe hole size, and then pushed into the pipe hole. Finally, by tightening the fastening bolts, the clamping plate applies axial pressure to the sealing module. The sealing module expands radially under pressure, thereby tightly filling all irregular gaps between cables and between the cable and the pipe hole wall, forming a watertight and airtight barrier.

[0069] See attached document Figure 4The intelligent flood monitoring and active drainage subsystem includes a water collection unit for collecting and temporarily storing floodwater. This unit is a prerequisite for the subsequent drainage execution unit (pump). Depending on its deployment location and function, the water collection unit includes two different types of structures: an outdoor water storage tank and a dedicated indoor cable trench collection well.

[0070] The water collection unit includes one or more (e.g., three, depending on the scheme summary outline) outdoor water storage tanks.

[0071] The outdoor reservoir is an underground or semi-underground structure pre-constructed in the outdoor area of ​​the substation (e.g., in a relatively low-lying area) to collect surface runoff from the substation area. In one embodiment, the reservoir is constructed of reinforced concrete.

[0072] According to one specific embodiment, the internal clear dimensions (length × width × depth) of a single reservoir are defined as 4000mm × 1800mm × 1000mm. This dimension provides a nominal buffer volume (e.g., 7.2 cubic meters).

[0073] The main functions of the reservoir are: first, to collect surface rainwater and floodwater in the area; second, to provide a centralized water intake space with a predetermined depth for drainage execution units (e.g., submersible pumps); and third, to provide a temporary flood buffer when the instantaneous rainfall during the flood season exceeds the rated discharge capacity of the pumps, utilizing its nominal volume.

[0074] The water collection unit also includes one or more indoor cable trench-specific water collection wells located indoors.

[0075] This dedicated water collection well is installed inside the cable trench system within the substation (e.g., the high-voltage room). Specifically, the water collection well is a small pit formed by excavation or prefabrication at the relatively lowest point of the cable trench terrain.

[0076] In one embodiment, the internal dimensions (length × width × depth) of the water collection well are defined as 400mm × 400mm × 400mm.

[0077] The function of this dedicated sump is to collect water that has seeped into the cable trench through seepage or other pathways. This sump provides a standardized installation and operating base for dedicated drainage terminals in the cable trench (e.g., flat-bottomed suction pumps), ensuring that the pumps can be placed at the lowest point of the trench to drain any residual water.

[0078] The intelligent flood monitoring and active drainage subsystem also includes a drainage execution unit. This unit is the power equipment responsible for forcibly draining the accumulated water in the collection unit to the outside of the substation. Depending on its installation location and functional characteristics, this unit specifically includes two types of pump sets.

[0079] The drainage execution unit includes a pump set installed in each outdoor water storage tank. In one embodiment, to achieve zonal autonomy and redundancy design, each outdoor water storage tank (e.g., all 3 locations) is independently equipped with a pump set, and each pump set consists of two (2) submersible pumps, one as the main pump and the other as the backup pump.

[0080] The operation logic of the pump set is managed by an intelligent control unit, enabling tiered startup. When the water level reaches the danger level (second threshold), the control unit first starts the main pump; if the water level drop is not as expected (for example, the rated flow of one pump cannot meet the drainage demand) or the water level continues to rise, the control unit automatically activates the second (standby) pump in the reservoir to achieve double the drainage capacity.

[0081] According to a specific embodiment, the submersible pump has a rated power of 1.1kW and a rated flow rate of 10m³ / h. 3 A submersible pump with a capacity of / h (e.g., WQD or WQ series models). The selection and operation of this pump set must meet specific operating conditions, including: the temperature of the water source being transported is less than 40℃; the pH value of the water source is between 6.5 and 8.5; the volume ratio of solid impurities in the water does not exceed 0.1%, and the particle size is not greater than 0.2mm; and the submersible depth does not exceed 5 meters.

[0082] The drainage execution unit also includes one or more cable trench flat bottom suction pumps, which constitute a dedicated drainage terminal for cable trenches.

[0083] This flat-bottomed suction pump is placed vertically or horizontally at the bottom of a dedicated sump in an indoor cable trench. It is specifically designed for shallow water and drainage applications.

[0084] In one embodiment, the pump body (or at least the suction inlet) is covered with a stainless steel protective layer. This protective layer acts as a filter to block any debris or contaminants that may be present in the cable trench, preventing them from clogging the pump body.

[0085] This pump can start and operate normally without being completely submerged in water (i.e., without reaching the minimum starting water level of a conventional submersible pump).

[0086] The pump's control logic is set to continue running for a period of time (e.g., 15 seconds) after draining the water from the sump to ensure maximum drainage, and then automatically shut down to prevent damage to the motor from dry running.

[0087] The intelligent flood monitoring and active drainage subsystem also includes a detection and sensing unit as the system's perception layer. This unit is responsible for collecting key water level information within the substation in real time, providing data input for the control unit's decision-making and alarm functions, and providing physical and visual status references for maintenance personnel. Specifically, this unit includes electronic water level sensor configuration and physical water level markings.

[0088] The core of the detection sensing unit is the water level sensor configuration deployed at each water collection point. To prevent system misjudgment or paralysis due to the failure of a single sensor, each detection point in this invention adopts a dual-mode redundancy design.

[0089] In one embodiment, the dual-mode redundancy is manifested in the simultaneous installation of two sets of sensors with different or independent technical principles at the same detection point (e.g., each outdoor water storage tank and each cable trench sump).

[0090] Specifically, this may include: Continuous level sensors: such as submersible hydrostatic sensors or ultrasonic sensors, are used to detect the continuous water level in reservoirs or cable trenches in real time (e.g., for system functions). This sensor is responsible for providing real-time water level data to the system master station, with a data acquisition time of no more than 3 seconds and an error rate of no more than 3% between the detected water level data and the measured data.

[0091] One or more sets of switch-type water level probes: for example, float switches or electrode probes. These probes are fixed at preset threshold heights and are specifically designed to detect warning water levels (level 1 alarm threshold) and danger water levels (level 2 alarm threshold).

[0092] The operating logic of this redundant configuration is as follows: a continuous level sensor is used for routine detection and trend analysis; while the level probe acts as a highly reliable trigger to ensure that alarms and automatic drainage functions are triggered reliably when critical thresholds (especially dangerous levels) are reached. The control unit compares the data from both sets of sensors simultaneously, and drainage is triggered when either set reaches the dangerous level threshold, thereby improving the system's reliability.

[0093] The detection sensing unit also includes one or more physical water level markers as a supplement, backup, and physical calibration tool for the electronic sensing unit.

[0094] According to the technical plan, the markings were placed at key locations both inside and outside the station.

[0095] Station markings: For example, use waterproof, high-contrast (e.g., red / yellow) paint to mark clear height scales on the inner walls of water tanks, the walls of high-voltage rooms, or the edges of cable trenches.

[0096] External markings: For example, markings reflecting the height of external floodwaters are made on the walls of the substation (especially on the side near the river) or on the gate pillars.

[0097] This physical water level marker has a dual function: Visual inspection: When maintenance personnel are on site (especially in extreme cases where electronic systems malfunction), they can directly judge the danger level of the current station (water accumulation) or the area outside the station (flood) by visually reading the physical markings.

[0098] Physical calibration: During system installation, commissioning, and subsequent regular maintenance, maintenance personnel can calibrate and verify the accuracy of the electronic sensors by comparing the real-time readings of the electronic sensors with the actual water level of the physical markers, ensuring that the error rate between the detected water level data and the measured data is always controlled within the allowable range of no more than 3%.

[0099] The intelligent flood monitoring and active drainage subsystem also includes an intelligent control unit. This unit is responsible for receiving data from the monitoring and sensing units, executing decision-making logic, and issuing instructions to the drainage execution unit.

[0100] The intelligent control unit adopts a two-level distributed architecture of master station and terminal in physical deployment to achieve high reliability.

[0101] System Master Station: The system master station is located in the main control room of the substation. In one embodiment, the system master station consists of an industrial computer or server, which serves as the flood monitoring backend and is responsible for centralized monitoring, data aggregation, storage, remote human-machine interaction (e.g., touch screen operation with a response time of no more than 3 seconds), and unified management and forwarding of alarm information for all drainage units in the entire station.

[0102] Intelligent terminal and water pump control box: This hardware is deployed alongside each drainage execution unit (e.g., next to an outdoor water storage tank, or at the end of an indoor cable trench). In one embodiment, the intelligent terminal is a local controller (e.g., a PLC or embedded system) that is directly electrically connected to the detection and sensing units and drainage execution units in its jurisdiction. The water pump control box houses the high-voltage components (such as contactors and circuit breakers) required to drive the water pumps. The intelligent terminal is responsible for executing local automatic control logic (e.g., the tiered alarm and automatic handling logic and zoned autonomous control logic described later) and communicates with the system master station via a local area network.

[0103] The intelligent control unit (specifically, a local intelligent terminal) executes a set of preset tiered treatment logic based on real-time water level data collected by the detection sensing unit (data collection time no more than 3 seconds). This logic defines at least three key water level thresholds: Safety level: System standby state.

[0104] Warning water level (Level 1 threshold): When the water level reaches this threshold for the first time, the smart terminal immediately determines it as a Level 1 alarm. The terminal immediately sends Level 1 alarm information to the system master station via the local area network (the system false alarm rate is no more than 1%). After receiving the information, the master station executes the remote intervention and information push logic described below. At this time, the drainage execution unit does not start automatically, but waits for remote confirmation from the maintenance personnel.

[0105] Dangerous water level (Level 2 threshold): When the water level continues to rise and reaches this threshold, the smart terminal determines it as a Level 2 alarm. The terminal immediately and automatically triggers the handling logic, sends a start command to the water pump control box, and automatically starts the submersible pump in the water storage tank or the flat-bottom suction pump in the cable trench for forced drainage.

[0106] Tiered start-up logic: After the secondary threshold is triggered, the smart terminal continues to monitor the water level even after starting one main pump. If (via the water level sensor) the water level is detected to be dropping slowly or still rising (indicating the rated flow rate of a pump, e.g., 10m³ / h), the system will continue to monitor the water level. 3 (If the current capacity is insufficient, the terminal will automatically start the second backup water pump in the area, doubling the drainage capacity).

[0107] Automatic stop logic: When the water level is drained to a safe level, the smart terminal automatically stops the water pump; (except for the cable trench flat bottom suction pump, which executes a specific logic of draining the accumulated water and then automatically shutting off after a 15-second delay).

[0108] The intelligent control unit (system master station) provides remote intervention and information push functions for operation and maintenance personnel (for the characteristics of unattended substations).

[0109] Remote intervention: Maintenance personnel can remotely intervene in the drainage execution unit (e.g., determine to start after receiving a level 1 alarm) through the monitoring backend (system main station) or mobile terminal APP. This intervention command has high priority and can remotely start and stop the water pump. The remote control response time of the mobile terminal is no more than 3 seconds.

[0110] Information push: When the system master station receives a level one or level two alarm message, it must not only issue an alarm on the background interface, but also immediately send the alarm message to the mobile terminal of the designated duty officer or supervisor via SMS module (or other instant messaging interface) to ensure that the time for the warning message and the time for clearing the warning message to reach the user terminal is no more than 3 seconds.

[0111] The key to this invention is the regional autonomous control logic, which is implemented by a smart terminal deployed locally.

[0112] In this invention, the four drainage systems of the substation (e.g., three outdoor water storage tanks and one indoor cable trench system) are each considered as independent zones. Each zone is equipped with an independent intelligent terminal, a detection and sensing unit, and a drainage execution unit.

[0113] Regional autonomy is reflected in: Independent decision-making: Each smart terminal independently analyzes the water level in its assigned area and independently executes the entire closed-loop logic from level one alarm to level two alarm, and then to tiered activation and automatic shutdown.

[0114] Fault isolation: This architecture ensures that even if the smart terminal, sensor, or pump in one zone (e.g., a reservoir) fails, or if the terminal's LAN communication with the system master station is interrupted, the independent detection and automatic flood discharge functions of the other three zones will never be affected. This design ensures that the system can still maintain basic, automated flood discharge capabilities even in extreme situations (e.g., communication failure or local equipment damage).

[0115] The intelligent control unit (especially the water pump control box) and the drainage execution unit are equipped with strict safety measures to prevent electric shock.

[0116] In one embodiment, these measures include: Reliable grounding: The metal casings of all water pump control boxes, intelligent terminal cabinets, and submersible pumps are reliably equipotentially connected to the substation's grounding grid via dedicated grounding wires.

[0117] Leakage Current Protection: Each water pump circuit (including submersible pumps in reservoirs and flat-bottom suction pumps in cable trenches) is independently equipped with a highly sensitive leakage current protection device (e.g., RCD). When leakage current is detected to reach the operating threshold, the protection device can instantly cut off the power supply.

[0118] Insulation and Waterproofing: All pump control boxes and smart terminals deployed outdoors are equipped with waterproof housings of a high protection rating (e.g., IP65 or higher). Cable joints are waterproofly sealed to ensure electrical insulation performance in wet or flooded environments (e.g., underwater cables for submersible pumps).

[0119] See attached document Figure 5 The present invention also provides an auxiliary safety and protection subsystem, which is used to improve the emergency response capabilities of substations, personnel passage safety and the integrity of emergency supplies during flood season and daily operation.

[0120] The auxiliary safety and protection subsystem includes the substation gate emergency and protection unit, which is designed to address potential electrical faults and functional failures of the main gate during the flood season.

[0121] The gate emergency and protection unit includes a waterproofing treatment for the gate control motor (e.g., an electric retractable gate or sliding gate). This treatment is designed to prevent the motor from short-circuiting or being damaged by flooding.

[0122] In one embodiment, the process includes: Physical elevation: The gate control motor and its electrical control box are fixedly mounted on a concrete base or steel structure support above the ground level. The elevation is designed to be higher than the historical highest flood level of the area, or at least higher than the design water-retaining height of the compacted flood barrier, so that it is completely removed from the potential flood-soaked area.

[0123] Electrical protection: The interfaces of the motor's power supply and control circuits are rigorously waterproofed using high-protection-level waterproof junction boxes and sealant. Simultaneously, the motor's metal casing and mounting brackets must be reliably connected to the substation's grounding grid, and a highly sensitive residual current device (RCD) is installed on its power supply circuit to achieve comprehensive protection against electric shock.

[0124] The emergency and protection unit for the main gate also includes an emergency access door installed on the main gate (or next to its fixed support post).

[0125] This emergency access door is a separate door panel sized only for personnel (not vehicles). It is designed to allow maintenance personnel to quickly enter the substation to perform emergency procedures via this access door (e.g., using a mechanical key) when the main door cannot be opened (via centralized control) due to power outages, motor failures (e.g., failures despite waterproofing in extreme cases), or because flood barriers are already in place.

[0126] In a preferred embodiment, the bottom of the emergency door frame and door leaf are also equipped with high-density waterproof sealing strips, so that when closed, it can fit tightly with the compression flood barrier or stainless steel ground track to achieve the same waterproof sealing level as the main door (after the flood barrier is installed), preventing it from becoming a new leakage point.

[0127] The auxiliary safety and protection subsystem also includes a flood season safe passage unit, which is used to guide maintenance personnel to conduct safe inspections or handle situations during floods (especially at night or during heavy rain).

[0128] In one embodiment, the unit includes: Safety railings: High-strength safety railings are installed on both sides of critical path points (e.g., small bridges leading to substations). These railings prevent maintenance personnel from slipping and falling into rising riverbeds or drainage ditches when the bridge surface is wet or flooded.

[0129] Route guidance signs: A series of route guidance signs are installed along the road from the station entrance (such as a small bridge) to the substation gate. In one embodiment, these signs (e.g., landmarks or pole-mounted signs) are made of highly visible, highly reflective material and installed at a specific height to ensure that safe passage routes that avoid low-lying areas or drainage outlets (such as yard drains) are clearly marked even when there is shallow standing water or extremely low visibility.

[0130] Stepped safety routes: In special locations within the station that must be traversed but are low-lying or have elevation differences (e.g., crossing outdoor cable trench covers or main drainage areas), steps or elevated safety walkways made of non-slip materials (such as fiberglass grating) are laid. This aims to create a stepped safety route above the potential flood level, ensuring that maintenance personnel's patrol paths remain safe and unobstructed throughout the flood season.

[0131] The auxiliary safety and protection subsystem also includes a flood control material protection unit to address the problem that flood control sandbags (e.g., traditional cloth sandbags) are easily damaged and fail when stored in the open.

[0132] In one embodiment, the unit is a dedicated flood control sandbox. This sandbox is strategically placed at locations where emergency containment is most needed (e.g., near high-voltage outdoor steps or gates). The structural features of the sandbox are designed to simultaneously meet the requirements of protection and ease of use: Weather-resistant enclosure: The enclosure is made of corrosion-resistant metal (such as stainless steel) or high-strength engineering plastic. Its cover (preferably with a sloping surface for easy drainage) has sealing properties to prevent direct exposure to sunlight (UV protection) and rainwater, preventing the cloth outer layer of the sandbag from degrading or becoming brittle due to long-term exposure.

[0133] Internal drainage structure: To prevent water vapor condensation or occasional rainwater splashing into the tank and accumulating inside, the bottom of the tank is equipped with multiple drainage holes, or the bottom is entirely made of a grid structure. This design ensures air circulation inside the tank and prevents the sandbags from rotting, getting moldy, or absorbing water and increasing in weight (after rain).

[0134] This protective unit ensures that the flood control sandbags remain dry, intact, and lightweight throughout the non-flood season, so that they can be quickly and effectively used by maintenance personnel in the event of a flood.

[0135] In one specific embodiment, the collaborative workflow of the system of the present invention is demonstrated using the flood control renovation of a 110kV unattended substation (e.g., the 110kV Tianyuan substation) as a case study. During the system construction phase, a passive sealing system (physical barrier) is first constructed: at the gate, a pressure-type flood barrier is installed, with its ground rail (304 stainless steel, 60x50x1.5mm) pre-embedded and flush with the ground. The two side columns (6063-T5 aluminum alloy, 103x78x6mm) are fixed, and the barrier (215x50x2.2mm) is stored in a dedicated flood control sandbox during non-flood seasons. Simultaneously, one-way check valves are installed at all drainage pipe outlets, cable outlets, and water grates within the substation perimeter wall.

[0136] Secondly, an active drainage system and an auxiliary safety and protection subsystem are constructed. The active drainage system includes: excavating and constructing three water storage tanks at three low-lying points planned both inside and outside the station, each with a volume of (length x width x depth) 4000 x 1800 x 1000 mm; and excavating small collection wells (400 x 400 x 400 mm) at relatively low-lying locations in the cable trenches within the high-voltage room. Subsequently, an intelligent flood monitoring and active drainage subsystem is deployed, with a system master station set up in the main control room, and an independent intelligent terminal and pump control box deployed next to each water storage tank. Each water storage tank is equipped with two sets of water level sensors (redundant design) and two submersible pumps (e.g., 1.1kW model, enabling phased start-up). A dedicated drainage terminal for cable trenches (with built-in flat-bottomed suction pumps and water level probes) is deployed in the small collection wells of the cable trenches. These four drainage systems are constructed as four autonomous units in different zones. The auxiliary safety and protection subsystem includes: physically raising the gate control motor of the substation gate and improving its grounding and leakage protection; adding an emergency small gate next to the main gate; improving safety railings and route signs at the small bridge outside the station; and setting up dedicated flood control sandboxes on key paths inside the station.

[0137] During the system operation phase (simulating flood conditions), before the arrival of heavy rains during the flood season, maintenance personnel arrive at the substation based on early warnings. They remove the compression-type flood barriers from the sandbox and install them sequentially between the gate rails and columns. These barriers are then secured using a top pressing device and side-pressing screws to ensure that the total permeability does not exceed 10L / hour·m². At the beginning of the flood season, as heavy rains begin, the water level in the river outside the substation rises. The one-way drainage check valve automatically closes, effectively preventing river water from flowing back into the substation through the drainage pipes. Meanwhile, rainwater inside the substation is discharged normally through the one-way valves of the drainage grates in the yard.

[0138] As the flood situation worsens, the system begins to actively drain water. Rainwater within the station exceeds the surface runoff capacity and begins to flow into three outdoor storage tanks. When the water level (data acquisition time ≤ 3 seconds) reaches the warning level, the intelligent terminal immediately reports a Level 1 alarm to the system master station (system false alarm rate ≤ 1%). The master station immediately sends SMS messages to the duty officer and the supervisor in charge (message arrival time ≤ 3 seconds). When the water level continues to rise to the danger level, the intelligent terminal in that zone (without master station intervention) immediately determines it as a Level 2 alarm and automatically starts the first submersible pump (e.g., 1.1kW, 10m). 3 The system discharges water out of the station via a forced flow rate of / h. If the rainfall is heavy and the water level continues to rise after the first pump starts operating, the intelligent terminal will automatically start the second submersible pump (i.e., the backup pump) to double the drainage volume. At the same time, a small amount of water that has seeped into the high-voltage chamber flows into the small collection well in the cable trench. After the probe of the cable trench's dedicated drainage terminal (as an independent autonomous zone) detects the water level, it will also immediately and automatically start the flat-bottomed suction pump to drain the water.

[0139] After the flood season ends, the system automatically resets. The submersible pumps in the outdoor reservoir continue to operate until the water level drops to a safe level, at which point the smart terminal automatically stops them. The flat-bottomed suction pumps in the cable trench drain the accumulated water and then automatically shut down after a 15-second delay to ensure no residue remains at the bottom of the trench. In terms of emergency response, if a power outage occurs during the flood season, causing the gate control motor (although already raised) to malfunction and the central control door to be unable to open, subsequent maintenance personnel can quickly enter the station through the emergency access door (mechanical lock) and safely proceed according to the route signs and stepped safety route to perform emergency operations.

[0140] In one specific embodiment, the present invention addresses a collaborative working mechanism for typical heavy rainfall scenarios (e.g., meteorologically defined rainstorms or torrential rain, with daily rainfall of 100-250 mm and hourly rainfall intensity of 60-100 mm). In this scenario, the system achieves automatic defense through a series of steps. First, when the water level in the river outside the station rises above the discharge outlet due to heavy rain, all preset one-way drainage check valves automatically close under water pressure, achieving passive defense and physically isolating the external flood backflow channel. Simultaneously, rainwater inside the station rapidly flows into the outdoor storage tank, triggering an active drainage intelligent response. The active drainage response is tiered: when the water level reaches the warning level, the system only sends a warning message to maintenance personnel and remains on standby; however, when the rainfall intensity continues to increase (e.g., exceeding 60 mm / hour) and the water level reaches the danger level, the intelligent terminals in each zone will immediately and automatically start the main submersible pump to perform immediate forced drainage. If the detection sensor unit detects that the water level continues to rise while a single water pump is running, the smart terminal will automatically trigger a phased start-up logic to put the backup water pump into operation, thereby doubling the drainage capacity of the zone to dynamically adapt to the peak rainfall.

[0141] In one specific embodiment, the present invention addresses the extreme survivability of extreme disaster scenarios (e.g., regional flooding caused by torrential rain, accompanied by power outages or remote communication failures). In this scenario, the system's core advantage lies in its highly fault-tolerant architecture. First, pre-installed manual pressure-type flood barriers and automatically closing check valves form a closed physical barrier, resisting static pressure seepage from extremely high water levels outside the substation under extreme pressure conditions. Second, the system's zoned autonomous design ensures reliable operation under extreme conditions. In extreme cases, assuming the substation's remote communication with the outside world is interrupted, or even if the system master station in the main control room fails, the intelligent terminals distributed in the four areas within the substation (three reservoirs and one cable trench) can still operate completely independently. Based on local sensor data, they continue to execute the entire logic from level two alarms to automatic start-up and shutdown, without requiring upper-level instructions. Finally, this architecture achieves fault isolation to prevent complete system failure. Even if the equipment in one zone is damaged due to siltation or flooding, the other three zones can still maintain independent and autonomous operation, ensuring that the substation still retains basic, localized automatic flood discharge capabilities and minimizing the impact of disasters.

[0142] In one specific embodiment, compared with industry-standard technologies, the intelligent flood control system constructed by this invention has undergone technological upgrades while maintaining compatibility with existing substation industry-standard technical requirements (e.g., conventional station water level detection and alarm functions). In terms of compatibility, this system comprehensively covers the industry's basic requirements for flood control in unattended substations, including real-time water level detection and over-limit alarm functions, remote manual intervention for pump start / stop functions, and local automatic control logic to maintain basic operations even during communication interruptions.

[0143] In terms of technological advancement, compared with conventional technologies, this invention is not merely a single alarm device, but a comprehensive defense system. Its advancement is first reflected in its active and passive closed-loop design, organically combining physical blocking facilities (flood barriers, check valves) with active drainage facilities, overcoming the shortcomings of conventional technologies that only focus on drainage while neglecting water repellency. Secondly, this invention adopts a distributed autonomous architecture, breaking through the traditional single-point centralized control mode, employing four regional autonomous units working in parallel. This architecture improves the system's survivability and reliability in disaster environments. Finally, this invention implements scenario-based customized strategies. For example, it uses high-flow submersible pumps for staged start-up in deep water areas (reservoirs), while using flat-bottomed suction pumps with delayed shutdown logic for shallow water areas (cable trenches). This is more in line with the actual flood control needs of substations than a common single control strategy.

Claims

1. A substation flood control detection system, characterized in that, include: A passive flood barrier subsystem includes a detachable, compressible flood barrier unit and a one-way drainage check valve. The passive flood barrier subsystem is used to physically prevent external floodwater from flowing back in. The flood monitoring and active drainage subsystem includes a water collection unit, a detection and sensing unit, a drainage execution unit, and an intelligent control unit. The detection and sensing unit is used to detect the water level of the water collection unit in real time. The intelligent control unit is configured to respond to the water level data acquired by the detection and sensing unit and automatically control the drainage execution unit to perform drainage according to a preset logic closed loop. And an auxiliary safety protection subsystem, which provides operational support and personnel safety protection during the operation of the passive flood barrier subsystem and the flood monitoring and active drainage subsystem.

2. The substation flood control detection system according to claim 1, characterized in that, The passive flood barrier subsystem also includes a cable trench outlet waterproof sealing unit, which is configured to seal the cable outlet hole to prevent groundwater from seeping through the hole.

3. The substation flood control detection system according to claim 1, characterized in that, The intelligent control unit is configured to execute hierarchical alarm and response logic: Continuously receive water level data and compare it with a preset first threshold and a second threshold, wherein the first threshold is the warning water level and the second threshold is the danger water level; When the water level is detected to have reached the first threshold, a level one alarm operation is executed, alarm information is sent through the communication network and waits for remote intervention instructions. When the water level is detected to have reached the second threshold, a level 2 alarm operation is executed, and a start command is automatically sent to the drainage execution unit to force drainage.

4. The substation flood control detection system according to claim 3, characterized in that, The drainage execution unit is equipped with a main pump and a standby pump within the same water collection unit, and the intelligent control unit is further configured to execute phased startup logic: After the secondary alarm operation is triggered, the main pump is started first; After the main pump is started, the water level change trend is continuously monitored. If the water level does not drop or the drainage demand exceeds the rated flow of the main pump, the standby pump is automatically started to increase the drainage volume.

5. A substation flood control detection system according to claim 1, characterized in that, The water collection unit includes a special water collection well for indoor cable trenches, and the drainage execution unit includes a flat-bottomed suction pump installed in the special water collection well for indoor cable trenches. The intelligent control unit is configured with specific shutdown logic for the flat-bottomed water pump: after detecting that the accumulated water has been drained, the control unit will continue to run the flat-bottomed water pump for a preset time and then automatically shut it off to drain the residual water at the bottom of the ditch.

6. The substation flood control detection system according to claim 1, characterized in that, The intelligent control unit includes a system master station and a local intelligent terminal; The system master station is configured to provide a remote human-machine interface, allowing maintenance personnel to remotely issue intervention commands. The intelligent control unit responds to the intervention commands and prioritizes the start and stop of the drainage execution unit. The local smart terminal is configured to independently execute water level detection, alarm judgment, and automatic start / stop logic for the water pump when communication with the system master station is interrupted.

7. A substation flood control detection system according to claim 1, characterized in that, The flood monitoring and active drainage subsystem is divided into multiple independent drainage zones; Each of the aforementioned independent drainage zones is equipped with an independent water collection unit, a detection and sensing unit, an intelligent control unit, and a drainage execution unit; Each area's intelligent control unit independently collects local water levels and makes decisions. When a device malfunctions in any area, it is isolated within that area, without affecting the detection and drainage functions of other areas.

8. A substation flood control detection system according to claim 1, characterized in that, The detection sensing unit adopts a dual-mode redundancy design, including a continuous liquid level sensor and a switch-type water level probe. The intelligent control unit is configured to compare data from two sets of sensors simultaneously. When the water level data detected by either set of sensors reaches the dangerous water level threshold, the startup logic of the drainage execution unit is triggered.

9. A substation flood control detection system according to claim 1, characterized in that, The water collection unit includes an outdoor water storage tank, and the drainage execution unit includes a submersible pump set installed in the outdoor water storage tank. The operation logic of the submersible pump set is managed by the intelligent control unit. When the water level is detected to drop to the preset safe water level, the submersible pump set will automatically stop operating.

10. A substation flood control detection system according to claim 1, characterized in that, The auxiliary safety protection subsystem includes: A unit for raising and waterproofing the gate control motor of the substation gate; An emergency access door unit installed on the main gate of the substation is used to provide personnel access in case the gate control motor fails; A flood season safety passage unit used to guide maintenance personnel through safe passage; And a dedicated flood control sandbox unit for standardized storage of flood control materials.

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