Elevator emergency leveler and building micro-grid reverse feedback system and control method thereof

Abstract

The application discloses an elevator emergency flat layer and building micro-grid reverse feedback system and a control method thereof, and relates to the technical field of building emergency power supply and direct-current micro-grid, and comprises an energy storage module arranged in a building, wherein the voltage level of the energy storage module is 24V or 48V; the 24V / 48V floor energy storage is reversely fed into a 480V direct-current bus of an elevator through an isolated type voltage boosting module, active flat layer driving of an elevator motor after power interruption is realized for the first time, at least 10 times of flat layer actions are supported, and the fatal defect that a traditional UPS can only maintain lighting but cannot drive the flat layer of the elevator is completely overcome; meanwhile, by means of a magnetic suction type 4-pin quick connector and a DN25 quick plug structure, the emergency access time is greatly shortened from 10-15 minutes required by traditional door breaking to 30 seconds, the rescue efficiency is increased by more than 90%, and 2 tons / 10 minutes of fire-fighting water can be provided in the instant of plugging, so that the technical blank of no quick water taking interface in the existing elevator emergency system is filled.

Description

Technical Field

[0001] This invention relates to the field of building emergency power supply and DC microgrid technology, specifically to an elevator emergency leveling system and a building microgrid reverse feedback system and its control method. Background Technology

[0002] Currently, emergency rescue for elevators in buildings during power outages primarily relies on traditional UPS emergency power supplies. However, traditional UPS systems can only maintain elevator car lighting, ventilation, and alarm systems for about 30 minutes. Their output is 220V AC, which cannot directly drive the elevator's DC traction motor for leveling. Trapped individuals often have to wait for external rescue or have professionals manually release the brakes, a process that can take 10-15 minutes, severely delaying crucial rescue time. Meanwhile, some buildings have attempted to use photovoltaic or energy storage inverters to power elevators, but due to the anti-islanding protection mechanism of grid-connected inverters, they automatically disconnect from the grid once power is lost, preventing them from feeding power back to the elevator's DC bus. Furthermore, existing buildings lack standardized rapid emergency interfaces. Firefighters or rescue personnel must break down doors and walls to locate the distribution box and perform wiring operations, which is not only inefficient but also poses a risk of electric shock. More importantly, existing emergency systems lack predictive scheduling capabilities and cannot replenish electricity and water in advance based on fire risk, energy storage charge status, and photovoltaic output. Once a power or water outage occurs, the system often fails within hours, making it difficult to meet the actual needs of long-term, multi-round emergency evacuations in high-rise buildings.

[0003] This invention aims to solve the following technical problems existing in the prior art: how to utilize indoor floor energy storage devices to directly drive the elevator DC bus after a mains power outage through reverse feedback, achieving at least 10 reliable leveling operations, thereby overcoming the defect that traditional UPS cannot drive the motor for leveling; how to design a fast interface that can be plugged in within 30 seconds, simultaneously achieving power connection and fire water supply connection, to shorten rescue time and fill the technical gap in emergency water supply interfaces; how to introduce a predictive scheduling algorithm based on edge computing to automatically replenish power and water 48 hours in advance based on fire risk, energy storage charge status, and photovoltaic output, ensuring sufficient energy and water supply in emergency situations, changing the outdated mode of passive emergency systems failing upon power outage; and how to achieve off-grid self-sufficiency for up to 600 days in extreme environments of water outage, power outage, and network outage, while reducing system costs to below 3,000 yuan per household, thereby providing an economical, reliable, and highly autonomous technical solution for building emergency safety. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an elevator emergency leveling and building microgrid reverse feed-back system and its control method, solving the technical problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an elevator emergency leveling and building microgrid reverse feeder system, comprising: An energy storage module, installed inside the building, has a voltage rating of 24V or 48V; A boost module is electrically connected to the energy storage module, and the boost module is used to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus; The quick access interface includes a first interface installed on the riser in the building's public area and a second interface installed on the interior wall. The first interface and the second interface are configured to complete the plug-in connection within 30 seconds. The control module is electrically connected to the boost module and the elevator DC bus respectively. The control module is used to respond to the power grid failure signal to control the boost module to start, so as to feed the electrical energy of the energy storage module back into the elevator DC bus and drive the elevator to perform leveling action. The booster module is configured to support the elevator to perform at least 10 leveling actions, and the quick access interface is configured to provide at least 2 tons of instantaneous water supply when plugged in.

[0006] In some embodiments, the boost module includes an isolated H-bridge topology and an LLC resonant converter; The boost module has a rated power of 3kW, a peak power of 5kW, and a conversion efficiency greater than or equal to 92%. The boost module has an isolation withstand voltage rating of at least 3kV between its input and output sides to comply with the EN81-20 / 50 standard.

[0007] In some embodiments, the quick access interface is a magnetic 4-pin quick connector; The magnetic 4-pin quick connector includes a PE ground pin, a positive pin, a first RS485 communication pin and a second RS485 communication pin on the 24V side, and a positive bus and a negative bus on the 480V side. The magnetic 4-pin quick connector is configured to first establish a ground connection and then establish a signal connection, and the detection time for completing the insertion is less than or equal to 1 millisecond.

[0008] In some embodiments, the control module further includes a predictive scheduling unit, which includes an edge computing chip. The edge computing chip is used to acquire elevator usage frequency data, the state of charge of the energy storage module, building fire risk probability, and rooftop photovoltaic output prediction data. The predictive scheduling unit is configured to generate scheduling instructions based on the elevator usage frequency data, the state of charge, the fire risk probability, and the rooftop photovoltaic output prediction data, so as to charge the energy storage module to the target state of charge 48 hours before the power grid outage. The edge computing chip has a computing power of 40 TOPS and runs the GRPO algorithm.

[0009] In some embodiments, the target state of charge is 90%; The predictive scheduling unit is also configured to generate a control command to shut down domestic water supply when the state of charge is below 10%, while maintaining the power supply to the fire protection and sensing systems.

[0010] In some embodiments, a switching module is also included, which is electrically connected between the mains power grid, the energy storage module, and the elevator DC bus. The switching module includes a contactor configured to switch the power supply of the elevator DC bus from the mains grid to the energy storage module within 0.1 milliseconds in response to the grid power failure signal.

[0011] In some embodiments, the quick access interface is a DN25 fast female connector or a fast male connector; The public area riser is equipped with a fast male head every three floors, and the fast male head is connected to the public area riser. The fast female head is installed on the indoor wall and is electrically connected to the energy storage module. The quick-connect female head and the quick-connect male head are configured to be connected via a John Guest quick-connect structure, and the water supply pressure in the connected state is 0.3MPa, the water supply flow rate is 5L / s, and the continuous water supply time is not less than 10 minutes.

[0012] In some embodiments, the energy storage module includes 112 floor energy storage bricks, each of which has a capacity of 1.25 kWh, the total capacity of the energy storage module is 140 kWh, and the bus voltage of the energy storage module is 48 V. The system also includes a 24V DC pump with a power of 25W, which is configured to run for 0.5 hours per day to achieve 600 days of off-grid self-sufficiency.

[0013] In some embodiments, the control module is further configured to control the boost module to automatically start when the voltage of the elevator DC bus is lower than 450V, and maintain the voltage of the elevator DC bus within the range of 480V±5%, and maintain the output current within the range of 15A±0.5A. The time taken for a single leveling action is 5 seconds, the energy consumption of a single leveling action is 36kJ, and the total energy consumption of the at least 10 leveling actions does not exceed 0.36kWh.

[0014] A control method for an elevator emergency leveling and building microgrid reverse feed-in system, used to control the elevator emergency leveling and building microgrid reverse feed-in system described in any one of the above claims, the control method comprising: In response to a power grid outage signal, the boost module is activated to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus and then feed it back into the elevator DC bus. The elevator is controlled to perform at least 10 leveling actions using the electrical energy from the energy storage module; In response to the plug-in signal of the quick access interface, the public area riser is controlled to deliver at least 2 tons of water to the household through the quick access interface; The startup of the booster module, the execution of the leveling action, and the delivery of water are all independently powered by the energy storage module in the off-grid state, and the energy storage module supports 600 days of off-grid self-sufficiency of the system.

[0015] This invention provides an elevator emergency leveling and building microgrid reverse power feedback system and its control method, which has the following beneficial effects: By using 24V / 48V floor energy storage and feeding it back into the elevator's 480V DC bus via an isolated boost module, it achieves, for the first time, active leveling drive of the elevator motor after a mains power outage, supporting at least 10 leveling actions. This completely overcomes the fatal flaw of traditional UPS systems, which can only maintain lighting and cannot drive elevator leveling. Simultaneously, by utilizing a magnetic 4-pin quick connector and a DN25 quick-connect structure, the emergency access time is significantly reduced from the traditional 10-15 minutes required for door breaking to 30 seconds, improving rescue efficiency by over 90%. Furthermore, it provides 2 tons / 10 minutes of fire-fighting water instantly upon connection, filling the gap in existing elevator emergency systems lacking rapid access. The system fills a technological gap in water interfaces. Furthermore, by deploying 40 TOPS edge computing units and running the GRPO predictive scheduling algorithm, it can automatically replenish power and water 48 hours in advance based on fire risk, battery state of charge, and photovoltaic output, ensuring a dual sufficiency of energy and water in emergency situations. This changes the outdated mode of traditional passive emergency systems that rely on manual inspections and fail upon power outages. Finally, thanks to the low-power design of 112kWh floor energy storage bricks and 25W DC pumps, the system can achieve 600 days of off-grid self-sufficiency in extreme environments such as water outages, power outages, and network outages, while the total cost is only about 3,000 yuan per household. This is more than 70% lower than the traditional solution of 5,000 yuan for a UPS plus tens of thousands of yuan for rework and renovation, significantly improving the economy and reliability of building emergency safety. Attached Figure Description

[0016] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0017] The technical solutions of 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.

[0018] This invention provides a technical solution for an elevator emergency leveling and building microgrid reverse power feedback system, comprising: an energy storage module, installed inside the building, with a voltage level of 24V or 48V; a boost module, electrically connected to the energy storage module, used to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus; a quick access interface, including a first interface installed on the building's public area riser and a second interface installed on the interior wall, the first and second interfaces being configured to complete the plug-in connection within 30 seconds; and a control module, electrically connected to both the boost module and the elevator DC bus, the control module being used to respond to a power outage signal to control the boost module to start, so as to feed the electrical energy of the energy storage module back into the elevator DC bus, driving the elevator to perform leveling actions; wherein, the boost module is configured to support the elevator to perform at least 10 leveling actions, and the quick access interface is configured to provide at least 2 tons of instantaneous water supply in the plug-in state.

[0019] In some embodiments, the boost module includes an isolated H-bridge topology and an LLC resonant converter; The boost module has a rated power of 3kW, a peak power of 5kW, and a conversion efficiency greater than or equal to 92%. The boost module has an isolation withstand voltage rating of at least 3kV between the input and output sides to comply with EN 81-20 / 50 standards.

[0020] In some embodiments, the quick access interface is a magnetic 4-pin quick connector; The magnetic 4-pin quick connector includes a PE ground pin, a positive pin, a first RS485 communication pin and a second RS485 communication pin on the 24V side, and a positive bus and a negative bus on the 480V side. Among them, the magnetic 4-pin quick connector is designed to first establish a ground connection and then establish a signal connection, and the detection time for completing the insertion is less than or equal to 1 millisecond.

[0021] In some embodiments, the control module further includes a predictive scheduling unit, which includes an edge computing chip. The edge computing chip is used to acquire elevator usage frequency data, the state of charge of the energy storage module, the building fire risk probability, and the rooftop photovoltaic output prediction data. The predictive scheduling unit is configured to generate scheduling instructions based on the elevator usage frequency data, state of charge, fire risk probability, and rooftop photovoltaic output prediction data to charge the energy storage module to the target state of charge 48 hours before the power grid outage. The edge computing chip has a computing power of 40 TOPS and runs the GRPO algorithm.

[0022] In some embodiments, the target state of charge is 90%; the predictive scheduling unit is also configured to generate a control command to shut off domestic water supply when the state of charge is below 10%, while preserving power supply to the fire protection and sensing systems.

[0023] In some embodiments, a switching module is further included, electrically connected between the mains power grid, the energy storage module, and the elevator DC bus; the switching module includes a contactor configured to switch the power supply to the elevator DC bus from the mains power grid to the energy storage module within 0.1 milliseconds in response to a power grid failure signal.

[0024] In some embodiments, the quick access interface is a DN25 quick female connector or quick male connector; a quick male connector is provided every three floors of the public area riser, and the quick male connector is connected to the public area riser; the quick female connector is installed on the indoor wall and electrically connected to the energy storage module; the quick female connector and quick male connector are configured to be plugged in through a John Guest quick-connect structure, and the water supply pressure in the plugged-in state is 0.3MPa, the water supply flow rate is 5L / s, and the continuous water supply time is not less than 10 minutes.

[0025] In some embodiments, the energy storage module includes 112 floor energy storage bricks, each with a capacity of 1.25 kWh, for a total capacity of 140 kWh, and the bus voltage of the energy storage module is 48 V. The system also includes a 24 V DC pump with a power of 25 W, configured to operate for 0.5 hours per day to achieve 600 days of off-grid self-sufficiency.

[0026] In some embodiments, the control module is further configured to control the boost module to automatically start when the voltage of the elevator DC bus is lower than 450V, and maintain the voltage of the elevator DC bus within the range of 480V±5%, and maintain the output current within the range of 15A±0.5A; wherein the time for a single leveling action is 5 seconds, the energy consumption of a single leveling action is 36kJ, and the total energy consumption of at least 10 leveling actions does not exceed 0.36kWh.

[0027] like Figure 1As shown, a control method for an elevator emergency leveling and building microgrid reverse feed-in system is provided for controlling the elevator emergency leveling and building microgrid reverse feed-in system described above. The control method includes: In response to a power grid outage signal, the boost module is activated to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus and then feed it back into the elevator DC bus. The elevator is controlled to perform at least 10 leveling actions using the electrical energy from the energy storage module; In response to the plug-in signal of the quick access interface, the control system will deliver at least 2 tons of water from the public area riser to the indoor area through the quick access interface; The booster module's startup, leveling action, and water delivery are all powered independently by the energy storage module in off-grid mode, and the energy storage module supports 600 days of off-grid self-sufficiency for the system.

[0028] It is worth noting that all standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The models of electrical structure equipment involved can be selected according to the user's needs, as long as they meet the requirements of this application. In addition, the circuit connection adopts conventional connection methods in the prior art. The supporting electrical structures such as the control, current detection, position feedback, predicted voltage synchronization and parameter adjustment of the electrical equipment are all existing technologies, such as PLC controllers and module structures, so they will not be described in detail here.

[0029] A specific embodiment of this application is described below with reference to the accompanying drawings: Example 1 (Reverse power supply and rapid water intake in a fire scenario) This embodiment uses a scenario of a fire in a high-rise residential building and a power outage as an example to illustrate in detail the actual application process of the elevator emergency leveling and building microgrid reverse power feedback system provided by the present invention.

[0030] t=0s: A fire breaks out inside the building, triggering the fire suppression system. Simultaneously, the mains power grid is interrupted due to the fire, and the elevators stop operating. Energy storage modules located beneath the floor inside the buildings enter standby mode, and the battery temperature sensors on these modules detect an ambient temperature rise to 75°C.

[0031] t=1s: The control module detects that the voltage of the elevator DC bus begins to drop from the rated 480V. When the bus voltage drops below 450V, the control module automatically issues a start command. The boost module immediately starts, boosting the 24V DC voltage output from the energy storage module to 480V DC through an isolated H-bridge + LLC topology, and feeding it back into the elevator DC bus. The output voltage of the boost module stabilizes within the range of 480V±5%, and the output current is 15A±0.5A.

[0032] t=3s: The glass bulb ruptures, the fire sprinkler system is activated, and about 3L of water is sprayed onto the area where the energy storage module is located to physically cool the battery and ensure the safe operation of the energy storage module in a high-temperature environment.

[0033] t=30s: Firefighters arrive at the scene, carrying mobile quick-connect equipment to the public stairwell. They locate the DN25 quick-connect male connectors installed every three floors on the stairwell riser and connect them to the pre-installed DN25 quick-connect female connectors on the interior wall. Thanks to the John Guest quick-connect structure, the entire connection process is completed in just 30 seconds. After connection, fire water from the public riser is supplied to the apartment at a pressure of 0.3 MPa and a flow rate of 5 L / s through the quick-connect interface, providing continuous water supply for 10 minutes, with a total water delivery of 2 tons, providing ample water for firefighting and rescue operations.

[0034] At t=45s: Under the continuous power supply of the energy storage module, the DC bus voltage of the elevator remains stable. The control module drives the elevator to perform leveling operations, each leveling operation taking 5 seconds and consuming 36kJ of energy. Since the total capacity of the energy storage module is 112kWh (achieved by 112 floor energy storage bricks × 1.25kWh), it is sufficient to support the elevator to perform more than 10 leveling operations continuously. The elevator transports residents stuck on the fire floor to the refuge floor or the ground floor in sequence, completing the evacuation.

[0035] t=60s: The first batch of residents were successfully evacuated to a safe area. Throughout the emergency, all power was supplied independently by the energy storage modules located beneath the floor, without relying on mains power or traditional UPS systems. Because the energy storage modules were pre-charged to 90% charge using predictive scheduling and the system supports 600 days of off-grid self-sufficiency, even during prolonged mains power outages, stable operation of elevator leveling, fire hydrant supply, emergency lighting, and the sensor network was ensured.

[0036] This embodiment fully demonstrates that in fire emergency scenarios, the present invention can achieve rapid connection in 30 seconds, elevator leveling 10 times, and fire water supply of 2 tons, reducing the rescue time by more than 90% compared to the traditional door-breaking access method (10-15 minutes).

[0037] Example 2 (Application scenario of predictive scheduling for advance power and water replenishment) This embodiment uses predictive scheduling in daily operation as an example to illustrate how the present invention can manage energy and water 48 hours in advance through edge computing algorithms to ensure sufficient resources in emergency situations.

[0038] Day 1, 08:00: The edge computing unit (40TOPS NPU, running the GRPO algorithm) located within the building continuously collects data. The collected data includes: elevator usage frequency (obtained from the elevator control system), the current state of charge of the energy storage module (currently 45%), the fire risk probability of the building's location (obtained from the meteorological department and the fire protection IoT platform, predicting a 12% risk probability for the next 48 hours), and the output forecast of the rooftop photovoltaic system (based on the weather forecast, the solar irradiance will be low for the next 48 hours, with an estimated average daily power generation of 8kWh).

[0039] Day 1, 08:05: The edge computing unit inputs the above data into the GRPO algorithm model. The model outputs a scheduling instruction: Since the fire risk probability exceeds the 10% threshold and the current state of charge is only 45%, insufficient to support the 10 leveling needs in an emergency, the instruction requires the energy storage module to be charged to the target state of charge of 90% within the next 48 hours. Simultaneously, the algorithm detects that the current water level in the storage tank is only 0.3 tons, lower than the 2 tons required for an emergency. Therefore, the instruction requires initiating a water replenishment program to replenish the storage tank to 0.8 tons (the daily reserve), and to schedule a rapid replenishment to 2 tons via the public area riser in an emergency.

[0040] Day 1, 08:10: The control module executes the scheduling command. The energy storage module begins charging by drawing power from the municipal power grid or the rooftop photovoltaic system. The charging process employs intelligent charging management, prioritizing the use of surplus power generated by the photovoltaic system to reduce operating costs. Simultaneously, the water supply solenoid valve opens, and municipal water is supplied to the storage tank through the water supply pipeline until the water volume reaches 0.8 tons, at which point it automatically shuts off.

[0041] Day 2, 14:00: The municipal power grid experienced a sudden outage due to extreme weather. At this time, the energy storage module's state of charge had reached 90% through the previous day's scheduled charging, with available energy of 100.8 kWh (based on a total capacity of 112 kWh). The water tank contained 0.8 tons of water, and an additional 1.2 tons of water could be replenished from the public area riser via a quick-connect interface, meeting the emergency water supply requirement of 2 tons.

[0042] Day 2, 14:05: The control module detected a mains power outage and automatically activated the boost module, feeding the energy from the energy storage module back into the elevator's DC bus. The elevator then began leveling operations powered by the energy storage module. Due to sufficient power in the energy storage module, the elevator successfully performed 10 leveling operations, consuming approximately 0.36 kWh (10 operations × 36 kJ), representing only 0.32% of the energy storage module's total capacity. The remaining power is sufficient to support off-grid self-sufficiency for hundreds of days.

[0043] Day 3, 10:00 AM: A user reported via the mobile app: "The scheduling was very accurate. After the power outage, the elevator leveled normally and no one was trapped." This feedback data was uploaded to the GRPO model in the edge computing unit as a positive reinforcement learning signal to optimize subsequent prediction and scheduling strategies, further improving the model's prediction accuracy.

[0044] This embodiment demonstrates that the present invention, through a predictive scheduling algorithm, can replenish electricity and water 48 hours in advance, effectively avoiding the problem of insufficient energy or water resources in emergency situations, which is substantially different from traditional passive emergency systems (which have no predictive capabilities).

[0045] Example 3 (600-day self-sustaining scenario with no water, electricity, or internet access) This embodiment uses a scenario of long-term water, power, and internet outages in an extreme case as an example to illustrate the 600-day off-grid self-sufficiency capability of the present invention.

[0046] Day 0: The area where the building is located suffers a severe natural disaster (such as an earthquake, flood, or a long-term energy crisis), the municipal power grid is completely paralyzed, municipal water supply pipelines are broken, and communication base stations are damaged, causing an internet outage. The building's elevator emergency leveling system and the building's microgrid reverse feed-back system automatically enter off-grid self-sufficiency mode.

[0047] Day 0, 1 hour: The control module detects a mains power outage and communication network unavailability, automatically switching to local edge computing mode. All scheduling decisions are made independently by the edge computing unit, without relying on the cloud. The energy storage module (total capacity 140kWh, composed of 112 floor energy storage bricks, 48V bus) begins supplying power to critical loads within the building, including: elevator emergency leveling system, fire detection sensors, emergency lighting, access control system, and 24V DC pumps.

[0048] Day 180: The system has been operating off-grid for 180 days. The state of charge of the energy storage module has decreased from 100% to 70%, consuming approximately 42 kWh of electricity. This electricity was mainly used for: the 24V DC pump (25W power, 0.5 hours of operation per day, approximately 2.25 kWh in 180 days), emergency lighting (LED lights, 10W total power, 24 hours per day, approximately 43.2 kWh in 180 days), the sensor network (5W total power, approximately 21.6 kWh in 180 days), and occasional elevator leveling operations (36 kJ each time, assuming 20 operations in 180 days, approximately 0.2 kWh in total). The initial water tank capacity was 2 tons. Through a low-flow water-saving strategy, daily domestic water consumption was controlled to within 2L, with approximately 0.36 tons consumed in 180 days, leaving approximately 1.64 tons of water remaining.

[0049] Day 360: The system has been operating off-grid for a full year. The energy storage module's charge level has dropped to 50%, with approximately 70 kWh remaining. At this point, the edge computing unit automatically adjusts load priorities according to the preset energy management strategy: shutting down non-critical domestic water circulation pumps while maintaining power supply to the fire protection and sensing systems. Approximately 1.2 tons of water remain in the storage tank, which can be supplemented in small quantities through rainwater harvesting and condensate recovery systems (as an optional supplementary solution), still sufficient to support the system for a considerable period.

[0050] Day 540: The system has been operating off-grid for one and a half years. The energy storage module's charge level has dropped to 30%, with approximately 42 kWh remaining. The edge computing unit has further tightened power distribution: the brightness of emergency lighting has been reduced to 50%, and the standby power consumption of the access control system has been decreased. The water tank contains approximately 0.6 tons of water, intended solely for fire emergency and drinking water use.

[0051] Day 600: The system has been operating off-grid for 600 days. The energy storage module's charge level has dropped to 10%, with approximately 14 kWh remaining. The edge computing unit executes a final protection strategy: only maintaining minimum standby power for the fire detection sensors and the elevator emergency leveling system, while shutting down all other loads (including residential lighting and access control). Approximately 0.3 tons of water remain in the storage tank as a final reserve for fire emergencies. At this point, the system can still function normally and, in the event of a fire or entrapment, can still drive the elevator to perform at least 1-2 leveling maneuvers and briefly activate the fire pump to supply water.

[0052] After 600 days: If there is still no external energy and water supply, the system will enter a deep hibernation state, retaining only the heartbeat signal of the sensors. Once external rescue arrives, power and water supply can be restored within 30 seconds through the quick access interface.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator emergency leveling and building microgrid reverse feeder system, characterized in that, include: An energy storage module, installed inside the building, has a voltage rating of 24V or 48V; A boost module is electrically connected to the energy storage module, and the boost module is used to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus; The quick access interface includes a first interface installed on the riser in the building's public area and a second interface installed on the interior wall. The first interface and the second interface are configured to complete the plug-in connection within 30 seconds. The control module is electrically connected to the boost module and the elevator DC bus respectively. The control module is used to respond to the power grid failure signal to control the boost module to start, so as to feed the electrical energy of the energy storage module back into the elevator DC bus and drive the elevator to perform leveling action. The booster module is configured to support the elevator to perform at least 10 leveling actions, and the quick access interface is configured to provide at least 2 tons of instantaneous water supply when plugged in.

2. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The boost module includes an isolated H-bridge topology and an LLC resonant converter; The boost module has a rated power of 3kW, a peak power of 5kW, and a conversion efficiency greater than or equal to 92%. The boost module has an isolation withstand voltage rating of at least 3kV between its input and output sides to comply with EN 81-20 / 50 standards.

3. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The quick access interface is a magnetic 4-pin quick connector; The magnetic 4-pin quick connector includes a PE ground pin, a positive pin, a first RS485 communication pin and a second RS485 communication pin on the 24V side, and a positive bus and a negative bus on the 480V side. The magnetic 4-pin quick connector is configured to first establish a ground connection and then establish a signal connection, and the detection time for completing the insertion is less than or equal to 1 millisecond.

4. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The control module also includes a predictive scheduling unit, which includes an edge computing chip. The edge computing chip is used to acquire elevator usage frequency data, the state of charge of the energy storage module, building fire risk probability, and rooftop photovoltaic output prediction data. The predictive scheduling unit is configured to generate scheduling instructions based on the elevator usage frequency data, the state of charge, the fire risk probability, and the rooftop photovoltaic output prediction data, so as to charge the energy storage module to the target state of charge 48 hours before the power grid outage. The edge computing chip has a computing power of 40 TOPS and runs the GRPO algorithm.

5. The elevator emergency leveling and building microgrid reverse feeder system according to claim 4, characterized in that, The target state of charge is 90%; The predictive scheduling unit is also configured to generate a control command to shut down domestic water supply when the state of charge is below 10%, while maintaining the power supply to the fire protection and sensing systems.

6. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, It also includes a switching module, which is electrically connected between the mains power grid, the energy storage module and the elevator DC bus; The switching module includes a contactor configured to switch the power supply of the elevator DC bus from the mains grid to the energy storage module within 0.1 milliseconds in response to the grid power failure signal.

7. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The quick access interface is a DN25 fast female or fast male connector; The public area riser is equipped with a fast male head every three floors, and the fast male head is connected to the public area riser. The fast female head is installed on the indoor wall and is electrically connected to the energy storage module. The quick-connect female head and the quick-connect male head are configured to be connected via a John Guest quick-connect structure, and the water supply pressure in the connected state is 0.3MPa, the water supply flow rate is 5L / s, and the continuous water supply time is not less than 10 minutes.

8. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The energy storage module includes 112 floor energy storage bricks, each with a capacity of 1.25 kWh, and the total capacity of the energy storage module is 140 kWh. The bus voltage of the energy storage module is 48 V. The system also includes a 24V DC pump with a power of 25W, which is configured to run for 0.5 hours per day to achieve 600 days of off-grid self-sufficiency.

9. The elevator emergency leveling and building microgrid reverse feeder system according to claim 1, characterized in that, The control module is also configured to control the boost module to automatically start when the voltage of the elevator DC bus is lower than 450V, and maintain the voltage of the elevator DC bus within the range of 480V±5%, and maintain the output current within the range of 15A±0.5A. The time taken for a single leveling action is 5 seconds, the energy consumption of a single leveling action is 36kJ, and the total energy consumption of the at least 10 leveling actions does not exceed 0.36kWh.

10. A control method for an elevator emergency leveling and building microgrid reverse feedback system, characterized in that, The control method for controlling the elevator emergency leveling and building microgrid reverse feeder system as described in any one of claims 1 to 9 includes: In response to a power grid outage signal, the boost module is activated to boost the DC voltage of the energy storage module to the rated voltage of the elevator DC bus and then feed it back into the elevator DC bus. The elevator is controlled to perform at least 10 leveling actions using the electrical energy from the energy storage module; In response to the plug-in signal of the quick access interface, the public area riser is controlled to deliver at least 2 tons of water to the household through the quick access interface; The startup of the booster module, the execution of the leveling action, and the delivery of water are all independently powered by the energy storage module in the off-grid state, and the energy storage module supports 600 days of off-grid self-sufficiency of the system.

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