Lift rescue power supply guarantee method

Abstract

The application provides a kind of lift rescue power supply guarantee method, it is related to elevator safety protection technical field, comprising: obtaining the running state data of lift, power supply state data, energy storage state data and rescue load state data;According to running state data and power supply state data, determine the current rescue task type, and divide the current rescue task type into multiple rescue power supply stages;According to the rescue load state data corresponding to each rescue power supply stage, determine the phased power supply demand of current rescue task;According to energy storage state data and phased power supply demand, calculate the rescue power supply guarantee index of lift;According to rescue power supply guarantee index, determine the corresponding rescue power supply strategy, and at least part of the circuit in drive loop, brake circuit, door machine circuit, lighting circuit and communication circuit is controlled by hierarchical power supply.It can make the standby power supply capacity match the current rescue task demand, improve the reliability of elevator rescue power supply guarantee.

Description

Technical Field

[0001] This application belongs to the field of elevator safety protection technology, specifically relating to a method for ensuring power supply during elevator rescue. Background Technology

[0002] Elevators are widely used in residential buildings, office buildings, hospitals, schools, and public transportation stations. In the event of abnormal mains power, power outages, or unstable power supply to the control circuit, they require a necessary emergency power supply to ensure the elevator car can perform rescue-related actions such as leveling, door opening, lighting, alarm activation, and communication. The emergency power supply capability directly affects the operational safety and continuity of rescue efforts during the handling of trapped individuals.

[0003] Existing elevators are typically equipped with backup power supplies, emergency rescue devices, or automatic leveling mechanisms. When the external power supply fails, the backup power supply provides power to the elevator control system, drive system, brakes, door operators, car lighting, and communication devices, enabling the car to move to the adjacent or nearest accessible floor and open the doors to release passengers. Simultaneously, some systems monitor the voltage, charge level, charging / discharging status, and battery health of the backup power supply to determine its availability.

[0004] However, in actual rescue scenarios, whether the backup power supply can complete the rescue process depends not only on the remaining power, but also on the car position, load, door zone distance, door operator status, braking status, type of power supply anomaly, rescue load combination, and duration of each rescue stage. If control is based solely on the static state of the backup power supply or a uniform power outage rescue procedure, it is easy to encounter a mismatch between the rescue mission requirements and the actual power supply capacity, resulting in insufficient power supply to some loads in areas such as leveling, door opening, lighting, or communication. Summary of the Invention

[0005] This application provides a method for ensuring power supply during elevator rescue, in order to solve one of the aforementioned technical problems.

[0006] The technical solution adopted in this application is as follows: This application provides a method for ensuring power supply during elevator rescue, characterized in that it includes: Acquire the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data; The current rescue mission type is determined based on the operational status data and power supply status data, and the current rescue mission type is divided into multiple rescue power supply stages. Based on the rescue load status data corresponding to each rescue power supply stage, determine the phased power supply requirements of the current rescue mission; Based on the energy storage status data and the phased power supply demand, calculate the rescue power supply guarantee index of the elevator. Based on the rescue power supply guarantee index, a corresponding rescue power supply strategy is determined, and at least some of the circuits in the drive circuit, braking circuit, gantry circuit, lighting circuit, and communication circuit are subjected to graded power supply control in accordance with the rescue power supply strategy.

[0007] According to one embodiment of this application, acquiring elevator operating status data, power supply status data, energy storage status data, and rescue load status data includes: The operational status data, power supply status data, energy storage status data, and rescue load status data are time-marked according to the same rescue time scale. Based on the time stamp, the operating status data, power supply status data, energy storage status data, and rescue load status data are mapped to the same rescue event; And according to the multiple rescue power supply stages corresponding to the current rescue mission type, establish the association between each rescue power supply stage and the corresponding data.

[0008] According to one embodiment of this application, determining the current rescue mission type based on the operational status data and power supply status data includes: Based on the current position of the car, the direction of car travel, the car load, the door zone distance, the door lock status, the safety circuit status, and the type of power supply anomaly, determine whether the elevator is in a non-door zone stop, a door zone stop, a low-speed controllable operation, or a control circuit holding state. Based on the determined results, the current rescue mission type is determined to be one of the following: driving level rescue mission, door opening guarantee mission, low power waiting mission, or control and hold rescue mission.

[0009] According to one embodiment of this application, in the event that the power supply status data or energy storage status data has missing data, abrupt changes in value, or inconsistencies, the available output energy, available output power, or terminal voltage drop corresponding to the energy storage status data is corrected based on the elevator's historical rescue power supply data, the most recent energy storage self-test data, and a preset safety margin, and the rescue power supply guarantee index is calculated based on the corrected energy storage status data.

[0010] According to one embodiment of this application, the rescue power supply guarantee index of the elevator is calculated based on the energy storage status data and the phased power supply demand, including: The energy storage unit's releaseable energy, maximum output power, terminal voltage drop, sustainable power supply time, and health correction factor are determined based on the energy storage status data. Based on the phased power supply requirements, determine the required energy, peak power, minimum operating voltage, and duration for each rescue power supply phase; The energy margin, power margin, voltage stability margin, and time guarantee margin are calculated separately, and at least one of the energy margin, power margin, voltage stability margin, and time guarantee margin is corrected using the health correction coefficient to obtain the rescue power supply guarantee index.

[0011] According to one embodiment of this application, hierarchical power supply control is performed on at least some circuits among the drive circuit, braking circuit, gantry circuit, lighting circuit, and communication circuit according to the rescue power supply strategy, including: The on / off status or output power of the drive power supply branch, brake power supply branch, gantry power supply branch, lighting power supply branch and communication power supply branch are controlled by the rescue power supply management unit respectively. The rescue power supply management unit is communicatively connected to the elevator controller, the backup power management module, and the rescue communication module, and outputs corresponding power supply control commands to each power supply branch according to the rescue power supply strategy.

[0012] According to one embodiment of this application, during the process of hierarchical power supply control in accordance with the rescue power supply strategy, at least one dynamic variable among the energy storage unit terminal voltage, output current, temperature, DC bus voltage, car speed, door zone detection signal and door operator operating current is acquired in real time. When the deviation between the dynamic variable and the corresponding predicted variable exceeds the preset deviation condition, the rescue power supply guarantee index is recalculated, and the rescue power supply strategy is adjusted according to the recalculated rescue power supply guarantee index.

[0013] According to one embodiment of this application, the emergency power supply strategy includes at least one of the following: a complete emergency power supply strategy, a fast leveling priority strategy, a low-power waiting strategy, and a minimum safe load maintenance strategy. Specifically, when executing the complete rescue power supply strategy, power is supplied to the control circuit, drive circuit, braking circuit, door operator circuit, lighting circuit, and communication circuit; When implementing the rapid leveling priority strategy, power is preferentially supplied to the drive circuit, braking circuit and gantry circuit, and power supply to non-essential loads is limited; When executing the low-power waiting strategy or the minimum safe load maintenance strategy, priority is given to maintaining power supply to at least one of the lighting circuit, communication circuit, and alarm circuit, and external rescue prompt information is generated.

[0014] According to one embodiment of this application, the operating status data includes at least one of car position, car speed, car load, door zone signal, door lock signal, and safety circuit signal; The power supply status data includes at least one of the following: mains input status, control circuit voltage, drive circuit voltage, door machine circuit voltage, and communication circuit voltage. The energy storage status data includes at least one of the following: remaining energy of the energy storage unit, terminal voltage, output current, internal resistance, temperature, number of cycles, and historical discharge curve.

[0015] This application also provides a power supply guarantee system for elevator rescue, including a data acquisition unit, a rescue task identification unit, a power demand determination unit, a guarantee index calculation unit, and a hierarchical power supply control unit; The data acquisition unit is used to acquire the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data. The rescue mission identification unit is used to determine the current rescue mission type based on the operating status data and power supply status data, and to divide the current rescue mission type into multiple rescue power supply stages. The power demand determination unit is used to determine the phased power demand of the current rescue mission based on the rescue load status data corresponding to each rescue power supply phase. The guarantee index calculation unit is used to calculate the rescue power supply guarantee index of the elevator based on the energy storage status data and the phased power supply demand. The hierarchical power supply control unit is used to determine the corresponding rescue power supply strategy according to the rescue power supply guarantee index, and to perform hierarchical power supply control on at least some of the circuits in the drive circuit, braking circuit, gantry circuit, lighting circuit and communication circuit according to the rescue power supply strategy.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: This application obtains the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data, and determines the current rescue task type based on the operating status data and power supply status data. This allows the rescue power supply control to no longer rely solely on the single power status of the backup power supply, but to combine the car's operating status, power supply anomaly status, and rescue load status to determine the actual rescue needs, thereby improving the matching degree between the rescue power supply control and the current rescue scenario.

[0017] This application divides the current rescue mission into multiple rescue power supply stages and determines the stage power supply requirements based on the rescue load status data corresponding to each rescue power supply stage. It can separately determine the power supply capacity required for stages such as brake release, low-speed operation, leveling confirmation, door opening and personnel release, lighting maintenance, and communication maintenance, thereby avoiding the rough estimation of the entire rescue process as a single load and improving the accuracy of determining rescue power supply requirements.

[0018] This application calculates the rescue power supply guarantee index based on energy storage status data and phased power supply demand. It can correlate the releaseable energy, maximum output power, terminal voltage drop, sustainable power supply time and health correction coefficient of the energy storage unit with the required energy, peak power, minimum operating voltage and duration of each rescue power supply phase. This allows for a quantitative judgment on whether the backup power supply can complete the current rescue task, thereby reducing the risk of misjudgment caused by judging the feasibility of rescue solely based on the remaining power.

[0019] This application determines the corresponding rescue power supply strategy based on the rescue power supply guarantee index, and performs hierarchical power supply control on at least some of the circuits in the drive circuit, braking circuit, door operator circuit, lighting circuit and communication circuit according to the rescue power supply strategy. It can perform complete rescue power supply when the energy storage capacity is sufficient, and prioritize the protection of key rescue loads such as leveling, door opening, lighting or communication when the energy storage capacity boundary is insufficient, thereby improving the rescue completion capability under limited power supply conditions.

[0020] This application uses the same rescue time scale to time-mark operational status data, power supply status data, energy storage status data, and rescue load status data, and maps multi-source data to the same rescue event and corresponding rescue power supply stage. This can keep data from different sources consistent in time and avoid deviations in rescue mission judgment or power demand calculation due to inconsistent data collection times.

[0021] This application corrects energy storage status data based on historical emergency power supply data, the most recent energy storage self-test data, and a preset safety margin when there are missing data collections, abrupt changes in values, or inconsistencies in power supply status data or energy storage status data. This can maintain the continuity of emergency power supply judgment when sensors are abnormal or data is incomplete, and reduce the impact of abnormal data on the selection of emergency power supply strategy.

[0022] This application acquires dynamic variables such as energy storage unit terminal voltage, output current, temperature, DC bus voltage, car speed, door zone detection signal, and door operator operating current in real time during the hierarchical power supply control process. When the deviation between the dynamic variables and the predicted variables exceeds the preset deviation condition, the rescue power supply guarantee index is recalculated. The rescue power supply strategy can be dynamically adjusted according to the actual power supply capacity and load changes during the rescue execution process, thereby improving the stability of the rescue process.

[0023] This application, by setting up a complete emergency power supply strategy, a fast leveling priority strategy, a low-power waiting strategy, and a minimum safe load maintenance strategy, can select different power supply control methods according to different emergency power supply guarantee indices, so that loads such as drive, braking, door operator, lighting, communication and alarm can be powered according to the emergency safety priority, thereby improving the utilization efficiency of emergency power supply under limited energy storage conditions. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This application provides an architecture diagram of a power supply guarantee system for elevator rescue. Figure 2 A flowchart of a power supply guarantee method for elevator rescue provided in an embodiment of this application; Figure 3 This is a schematic diagram of the branch of the rescue power supply strategy provided in the embodiments of this application. Detailed Implementation

[0025] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following embodiments are only used to illustrate this application and are not intended to limit the scope of protection of this application.

[0026] In the description of the embodiments of this application, the terms "first," "second," etc., are used only to distinguish the same or similar objects and do not indicate a specific order or degree of importance. The term "multiple" can be understood as two or more. The term "and / or" is used to indicate any one or more combinations between related objects. Unless otherwise expressly defined, the terms "connection," "communication connection," "acquisition," "determine," etc., should be interpreted broadly, for example, they can be direct connections or indirect connections through intermediate modules; they can be real-time acquisition or acquisition according to a preset period.

[0027] In this embodiment, a rescue event can be understood as a complete rescue process triggered by a power supply anomaly, a trapped person alarm, a rescue initiation command, or a rescue power supply switching signal. A rescue event may include processes such as rescue status identification, rescue power supply phase division, power demand calculation, power supply strategy determination, tiered power supply execution, and rescue result recording.

[0028] In this embodiment, the rescue power supply phase can be understood as a processing phase in the current rescue mission that has a relatively independent power supply object and power supply demand. For example, driving a leveling rescue mission may include a braking release phase, a low-speed movement phase, a leveling confirmation phase, a door opening and personnel release phase, and a lighting and communication maintenance phase. The phased power supply demand can be understood as a set of power supply parameters such as the required energy, peak power, minimum operating voltage, expected duration, and starting current demand corresponding to each rescue power supply phase.

[0029] This application uses an elevator with a rated load of 1000 kg, a rated speed of 1.5 m / s, and equipped with a drive circuit, a braking circuit, a door operator circuit, a lighting circuit, a communication circuit, and an alarm communication branch as an example for illustration. This elevator is equipped with a backup power supply, which can be a battery pack, a supercapacitor pack, or an energy storage unit formed by a combination of a battery pack and a supercapacitor pack. In one example, the backup power supply has a rated capacity of 1200 Wh, a rated output voltage of 220 V, and a maximum continuous output power of 2500 W.

[0030] It should be noted that the alarm communication branch can serve as a rescue alarm branch within the communication loop, or as an alarm loop independently set up from the communication loop. In the following embodiments, when alarm power supply is involved, it can be understood as a rescue alarm function branch of the communication loop, or as a low-power rescue load that participates in the transmission of rescue information together with the communication loop.

[0031] Figure 1 The architecture of a power supply guarantee system for elevator rescue provided in an embodiment of this application is illustrated. For example... Figure 1 As shown, the system may include a data acquisition unit, a rescue mission identification unit, a power supply demand determination unit, a guarantee index calculation unit, and a tiered power supply control unit. The data acquisition unit can communicate with the elevator controller, car position detection device, load detection device, door zone detection device, door lock detection device, safety circuit detection device, power supply detection device, backup power management module, and rescue load detection module.

[0032] The rescue mission identification unit, power demand determination unit, and guarantee index calculation unit can be installed in the elevator control cabinet, rescue power supply management unit, edge computing terminal, or elevator IoT gateway. The hierarchical power supply control unit can use relays, contactors, solid-state switches, power management modules, or power distribution modules to perform hierarchical control on at least some of the branches of drive power supply, braking power supply, door operator power supply, lighting power supply, communication power supply, and alarm communication.

[0033] Figure 2 The flowchart of the elevator rescue power supply guarantee method provided in the embodiments of this application is illustrated. Figure 2 As shown, the method may include the following steps.

[0034] S100 acquires the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data.

[0035] Specifically, the operating status data may include at least one of the following: car position, car speed, car load, direction of travel, door zone signal, door lock signal, safety circuit signal, brake status, and target floor information. The operating status data may be generated by the elevator controller, encoder, car position detection device, load detection device, door zone detection device, door lock detection device, and safety circuit detection device.

[0036] In one example, the car was detected to be currently located between the 4th and 5th floors, 1.8m from the door zone on the 5th floor, with a car speed of 0m / s, a car load of 620kg, a locked door signal, a closed safety circuit signal, and a brake engaged. These operational data indicate that the car is stopped outside the door zone and possesses the basic safety conditions for low-speed leveling under emergency power supply conditions.

[0037] Power supply status data may include at least one of the following: mains input status, control circuit voltage, drive circuit voltage, braking circuit voltage, door operator circuit voltage, lighting circuit voltage, communication circuit voltage, DC bus voltage, input phase loss status, and voltage dip status. Power supply status data may be generated by a power supply detection device, voltage acquisition module, current acquisition module, frequency converter, or elevator controller.

[0038] In one example, the detected mains input voltage dropped from 380V to 80V, the control circuit voltage dropped from 220V to 90V, the DC bus voltage of the drive circuit was lower than the preset operating voltage, and the communication circuit was maintained at 24V by the backup power supply. These power supply status data indicate an abnormal external power supply, requiring the backup power supply to provide emergency power.

[0039] Energy storage status data may include at least one of the following: remaining energy capacity of the energy storage unit, terminal voltage, output current, internal resistance, temperature, cycle count, historical discharge curves, most recent self-test result, and health status. This energy storage status data can be generated by a backup power management module, a battery management system, or an energy storage monitoring module.

[0040] The historical discharge curve may include data on the terminal voltage change, output power change, and discharge duration of the energy storage unit under different output currents, temperatures, remaining charge levels, and load power conditions. The historical discharge curve can be generated by the backup power management module during routine self-checks, maintenance tests, or historical emergency repairs.

[0041] In one example, the backup power supply has a rated capacity of 1200Wh, a current remaining charge of 72%, a terminal voltage of 221V, an output current of 0.8A, a temperature of 31°C, an internal resistance of 0.18Ω, a cycle count of 410, and a recent self-test result showing a health status of 88%. This energy storage status data is used to subsequently determine the backup power supply's releaseable energy, maximum output power, and voltage stability capabilities.

[0042] The rescue load status data may include the load status of the drive circuit, the load status of the braking circuit, the load status of the door operator circuit, the load status of the lighting circuit, the load status of the communication circuit, the load status of the alarm communication branch, and at least one of the rated power, starting current, continuous working time and minimum working voltage of each branch.

[0043] In one example, the power consumption of the drive circuit during low-speed rescue operation is 1600W, the power consumption of the brake circuit for release is 180W, the power consumption of the door operator circuit for door opening is 300W, the power consumption of the car lighting is 40W, the power consumption of the communication circuit is 15W, and the power consumption of the alarm communication branch is 10W. The above rescue load status data is used to determine the actual power supply requirements for each stage of the rescue power supply process.

[0044] In one possible implementation, the operating status data, power supply status data, energy storage status data, and rescue load status data are time-stamped according to the same rescue timescale. This same rescue timescale can be uniformly generated by the elevator controller, the rescue power supply management unit, or the edge computing terminal. For example, using the moment of power supply anomaly as t0, data collected at time points such as t0+0.1s, t0+0.2s, and t0+0.5s are uniformly mapped to the same rescue event, thereby avoiding data misalignment caused by different sensor sampling periods.

[0045] Furthermore, based on the multiple rescue power supply stages corresponding to the current rescue mission type, a correlation is established between each rescue power supply stage and its corresponding data. For example, the brake release stage is associated with the brake status, brake circuit voltage, and brake circuit current; the low-speed movement stage is associated with the car position, car speed, car load, drive circuit voltage, and DC bus voltage; the door opening and passenger release stage is associated with the door zone signal, door lock signal, door operator operating current, and door operator circuit voltage; and the lighting and communication maintenance stage is associated with the lighting circuit voltage, communication circuit voltage, and alarm communication branch status.

[0046] S200, determine the current rescue mission type based on the operating status data and power supply status data, and divide the current rescue mission type into multiple rescue power supply stages.

[0047] Specifically, the rescue mission identification unit can determine whether the elevator is in a non-door stop, door stop, low-speed controllable operation, or control circuit hold-down state based on the car's current position, car direction of travel, car load, door zone distance, door lock status, safety circuit status, and power supply anomaly type. The door zone distance can be determined based on the difference between the car's current position and the nearest floor's door zone position. The power supply anomaly type can be determined based on the mains power input status, control circuit voltage, drive circuit voltage, and door operator circuit voltage.

[0048] In one example, the car is 1.8m away from the 5th floor door zone, the car speed is 0m / s, the car load is 620kg, the safety circuit is closed, the door lock is in the locked state, the mains input voltage is abnormal, and the control circuit requires backup power. Based on the above data, the rescue mission identification unit determines that the current rescue mission type is a drive-leveling rescue mission. This mission type can be divided into the braking release phase, low-speed movement phase, leveling confirmation phase, door opening and passenger release phase, and lighting and communication maintenance phase.

[0049] In another example, the car is already within the 5th floor door zone, the door zone signal is valid, and the door lock status is normal, but the door operator circuit voltage is lower than the normal door opening voltage. At this time, the rescue mission identification unit can determine the current rescue mission type as a door zone opening support mission. This mission type can be divided into the door zone confirmation phase, the door operator power supply phase, the door opening and passenger release phase, and the communication maintenance phase.

[0050] In another example, the backup power supply has low remaining power, and the voltage at the energy storage unit drops significantly even under light load conditions. Furthermore, the expected power demand of the drive circuit exceeds the current output power of the backup power supply. In this case, the rescue mission identification unit can determine the current rescue mission type as a low-power standby mission. This mission type can be divided into a minimum lighting hold phase, an alarm communication hold phase, and an external rescue notification phase.

[0051] In another example, if the mains input voltage drops from 380V to 300V and then recovers within a short period, and the drive circuit has not yet entered the rescue operation state, but the control circuit voltage is lower than the normal holding voltage, or the elevator controller detects a short-term risk of power supply drop, then the rescue task identification unit can determine the current rescue task type as a control-hold rescue task. Under this task type, priority is given to maintaining power supply to the elevator controller, door zone detection device, communication module, and status acquisition module to avoid loss of control status, and this can be divided into a control circuit holding phase, a status monitoring phase, and a necessary communication holding phase.

[0052] Through the above processing, the current rescue mission type is no longer determined by a single power outage signal, but rather by a combination of operational and power supply status data. Different rescue mission types correspond to different rescue power supply phases, providing a basis for subsequent phased power supply demand calculations.

[0053] S300, based on the rescue load status data corresponding to each rescue power supply stage, determine the phased power supply requirements of the current rescue mission.

[0054] Specifically, the power supply demand determination unit can determine the set of loads that need to participate in the rescue based on the current rescue mission type, and determine the power supply demand for each rescue power supply stage based on the rescue load status data corresponding to each rescue power supply stage. The staged power supply demand may include at least one of the following: energy demand, peak power, minimum operating voltage, expected duration, starting current demand, and permissible power interruption conditions for each stage.

[0055] In one possible implementation, the energy requirement for the i-th rescue power supply stage can be determined as follows:

[0056] in, This represents the energy demand for the i-th stage of emergency power supply, expressed in Wh. This represents the total operating power of all rescue loads that participate in power supply simultaneously during the i-th rescue power supply phase, or the peak operating power corresponding to this rescue power supply phase, in W. This represents the estimated duration of the i-th rescue power supply phase, in seconds.

[0057] The total power supply requirement for the current rescue mission can be determined based on the energy requirements of multiple rescue power supply phases:

[0058] in, This indicates the total energy required for the current rescue mission; Indicates the number of stages of power supply during the rescue operation; This refers to reserved safety energy to cover additional energy consumption caused by load start-up impact, communication maintenance, or extended rescue processes. The reserved safety energy can be determined based on at least one of the following: a preset proportion of the sum of energy requirements at each stage of the current rescue mission, the energy required for gantry crane start-up, the energy required for communication maintenance, or historical rescue energy consumption deviations. For example, the reserved safety energy can be 10%-30% of the sum of energy requirements at each stage, or an additional 10Wh-50Wh can be added based on historically estimated energy levels.

[0059] In an example of a horizontal rescue mission, the braking circuit power during the braking release phase is 180W, and the duration is 6s. The energy required for this phase is:

[0060] The drive circuit power during the low-speed movement phase is 1600W, and the duration is 18s. Therefore, the energy requirement for this phase is:

[0061] If the power consumption of the door operator during the door opening phase is 300W and the duration is 12s, then the energy requirement for this phase is:

[0062] The combined power required for the lighting, communication, and alarm communication branches is 65W, with an estimated duration of 600 seconds. Therefore, the energy demand during this phase is:

[0063] If reserve safety energy Taking 10Wh, the total energy requirement for the current rescue mission is:

[0064] The above example illustrates that in a single leveling rescue mission, although the drive circuit has high power, its duration is short; the lighting and communication phases have lower power but longer durations. Therefore, calculating the power demand separately according to the rescue power supply phase can more accurately reflect the actual consumption of backup power at different stages.

[0065] S400, calculate the rescue power supply guarantee index of the elevator based on the energy storage status data and the phased power supply demand.

[0066] Specifically, the guarantee index calculation unit can determine the releaseable energy, maximum output power, terminal voltage drop, sustainable power supply time, and health correction factor of the energy storage unit based on the energy storage status data. The releaseable energy can be determined based on the rated capacity, remaining capacity, temperature correction factor, and health correction factor of the energy storage unit.

[0067] In one possible implementation, the releasable energy of the energy storage unit can be determined as follows:

[0068] in, This indicates the releaseable energy of the energy storage unit; Indicates the rated capacity of the energy storage unit; Indicates the percentage of remaining electricity in the energy storage unit; This represents the temperature correction factor; This represents the health correction factor. The health correction factor can be determined based on at least one of the following: internal resistance of the energy storage unit, number of cycles, most recent self-test result, and historical discharge curves. For example, when the internal resistance of the energy storage unit increases, the number of cycles increases, or the most recent self-test result decreases, the health correction factor decreases accordingly.

[0069] In one example, the backup power supply rated capacity It has a capacity of 1200Wh, and the current remaining power is... The temperature correction factor is 72%. The health correction factor is 0.95. If the value is 0.88, then the energy that can be released by the energy storage unit is:

[0070] The aforementioned releaseable energy is not simply equivalent to the remaining power of the backup power supply, but rather adjusted for temperature and health conditions. This process reduces misjudgments of available power capacity caused by battery degradation, low temperatures, or high temperatures.

[0071] In one possible implementation, the lowest terminal voltage under load can be determined as follows:

[0072] in, This indicates the lowest terminal voltage under predicted load conditions. This indicates the no-load terminal voltage of the energy storage unit; This indicates the predicted load current during the current emergency power supply phase; This represents the equivalent internal resistance of the energy storage unit. This prediction result is used to determine whether the energy storage unit can maintain the minimum operating voltage required for the rescue load under the current rescue load.

[0073] In one example, the no-load terminal voltage of the energy storage unit 221V, predicted load current The equivalent internal resistance is 50A. If the Ω is 0.18, then:

[0074] If the rescue load has the lowest operating voltage If the value is 198V, it means that there is still a voltage stability margin under the current load.

[0075] In one possible implementation, to avoid the difference in numerical magnitude between different margins affecting the emergency power supply guarantee index, the energy margin, power margin, voltage stability margin, and time guarantee margin can be normalized to obtain normalized energy margin, normalized power margin, normalized voltage stability margin, and normalized time guarantee margin.

[0076] The normalization margin can be determined as follows:

[0077] in, Indicates normalized energy margin; Indicates the normalized power margin; Indicates the normalized voltage stability margin; This indicates the normalization time margin; This indicates the maximum output power of the energy storage unit; This indicates the peak power during the current rescue mission; Indicates the minimum operating voltage of the rescue load; This indicates the time that the energy storage unit can maintain operation under low-power loads; This represents the low-power hold-up time required for the rescue mission. Through the above normalization process, the values ​​of each margin are limited to between 0 and 1.

[0078] The The power consumption can be determined based on the energy that the energy storage unit can release and the power of the low-power load. For example, in a low-power standby state, if the total power of the lighting, communication, and alarm communication branches is 65W, and the energy that the energy storage unit can use for low-power maintenance is 21.67Wh, then the time that the low-power load can be maintained is approximately 1200s.

[0079] The emergency power supply guarantee index can be determined as follows:

[0080] in, Indicates the power supply guarantee index for emergency response; , , , These represent the weighting coefficients corresponding to the normalized energy margin, normalized power margin, normalized voltage stability margin, and normalized time assurance margin, respectively, and the sum of all weighting coefficients can be 1. Since the values ​​of each normalized margin range from 0 to 1, the emergency power supply assurance index... The value of can also be between 0 and 1.

[0081] In one example, the total energy requirement for the current rescue mission is calculated based on S300. The energy storage unit can release 30.13Wh, calculated based on the S400. It has a capacity of 722.30Wh; the maximum output power of the backup power supply is [not specified]. It is 2500W, the peak power of the current rescue mission. 1600W; predicted minimum terminal voltage under load. 212V is the minimum operating voltage for rescue loads. It operates at 198V; the energy storage unit can sustain low-power load operation for an extended period. The rescue mission requires a low-power sustain time of 1200 seconds. It lasts for 600 seconds.

[0082] Based on the above data, we can conclude that:

[0083] If preset weights , , , If the values ​​are 0.35, 0.30, 0.20, and 0.15 respectively, then the emergency power supply guarantee index is:

[0084] In this example, the emergency power supply guarantee index is 0.682, indicating that the backup power supply can support critical emergency actions such as leveling and opening doors. However, the voltage stability margin is relatively low. Therefore, a fast leveling priority strategy can be given priority, and the terminal voltage and DC bus voltage should be monitored in real time during the execution process.

[0085] In another example, if the backup power supply has a rated capacity of 400Wh, the current remaining power is 18%, the temperature correction factor is 0.90, and the health correction factor is 0.70, then:

[0086] If the total energy requirement for the current rescue mission is still 30.13Wh, then although the energy margin is positive, if the maximum output power is only 900W, which is lower than the peak power of 1600W during the drive phase, the normalized power margin is 0. In this case, even if the remaining energy of the backup power supply is close to meeting the requirements numerically, a drive-level rescue should not be executed directly. Instead, a low-power waiting strategy or a minimum safe load maintenance strategy should be selected. This example illustrates that the rescue power supply guarantee index considers energy, power, voltage stability, and duration simultaneously, avoiding rescue decisions based solely on remaining power.

[0087] In one possible implementation, when there are missing data, abrupt changes in values, or inconsistencies in the power supply status data or energy storage status data, the available output energy, available output power, or terminal voltage drop corresponding to the energy storage status data can be corrected based on the elevator's historical emergency power supply data, the most recent energy storage self-test data, and the preset safety margin. The emergency power supply guarantee index can then be calculated based on the corrected energy storage status data.

[0088] The preset safety margin can be a preset proportional margin or a preset fixed energy margin. For example, the corrected usable output energy can be determined based on 80%-95% of the historically estimated releaseable energy, or 10Wh-50Wh can be deducted from the historical estimates as a safety redundancy. The preset safety margin can be pre-set based on the backup power supply type, service life, rescue load power, and historical rescue deviation data.

[0089] For example, if the remaining energy data of the energy storage unit is missing, but the terminal voltage is 219V, the temperature is 30℃, the most recent self-test health status is 86%, and the historical discharge curve shows that the energy that can be released in the same terminal voltage range is approximately 600Wh, the energy that can be released can be corrected to 540Wh for calculation based on a preset safety margin of 90%. As another example, if the terminal voltage suddenly changes from 221V to 160V within 0.1s, but the output current, DC bus voltage, and temperature do not change accordingly, this sudden voltage change can be identified as an abnormal sampling, and a smooth correction can be performed using adjacent valid sample values.

[0090] S500, based on the rescue power supply guarantee index, determine the corresponding rescue power supply strategy, and perform graded power supply control on at least some of the circuits in the drive circuit, braking circuit, door operator circuit, lighting circuit and communication circuit according to the rescue power supply strategy.

[0091] Specifically, the hierarchical power supply control unit can determine at least one of the following strategies based on the rescue power supply guarantee index: complete rescue power supply strategy, fast leveling priority strategy, low power consumption waiting strategy, and minimum safe load maintenance strategy, and output power supply control commands to the corresponding power supply branch according to the determined rescue power supply strategy.

[0092] In one example, when the emergency power supply guarantee index... When both the normalized power margin and the normalized voltage stability margin are greater than 0, the tiered power supply control unit can execute a complete emergency power supply strategy; when At that time, the tiered power supply control unit can execute a fast leveling priority strategy; when When the power supply control unit is in use, it can execute a low-power standby strategy; when At this time, the tiered power supply control unit can execute a minimum safe load maintenance strategy. The above thresholds can be preset according to the elevator's rated load, backup power capacity, rescue waiting time, and maintenance requirements, and do not constitute a limitation on specific numerical ranges.

[0093] When implementing a complete rescue power supply strategy, the tiered power supply control unit can supply power to the control circuit, drive circuit, braking circuit, door operator circuit, lighting circuit, and communication circuit. This strategy is applicable when the rescue power supply assurance index indicates that the backup power supply can complete the current rescue task. Under this strategy, the elevator can complete the rescue process, including brake release, low-speed movement, leveling confirmation, door opening and passenger release, and rescue information communication.

[0094] When implementing a rapid leveling priority strategy, the tiered power supply control unit can prioritize power supply to the drive circuit, braking circuit, and door operator circuit, while limiting power supply to non-rescue-essential loads. For example, power supply to decorative lighting, advertising screens, non-rescue display devices, or other non-rescue-essential loads can be limited, ensuring that limited energy storage is prioritized for car movement, leveling, and door opening.

[0095] In one example, if the emergency power supply guarantee index is calculated based on the aforementioned method... In this case, a rapid leveling priority strategy can be implemented. Specifically, 180W of power can be output to the braking circuit for 6 seconds, followed by 1600W of power to the drive circuit for 18 seconds, allowing the car to enter the 5th floor door zone. Then, 300W of power can be output to the door operator circuit for 12 seconds to complete the door opening. During this process, the lighting circuit, communication circuit, and alarm communication branch maintain low-power power supply, while power supply to non-essential rescue loads is restricted.

[0096] When implementing a low-power waiting strategy, the tiered power supply control unit can limit or stop the power supply to the drive circuit, prioritizing the maintenance of power to at least one of the lighting circuit, communication circuit, and alarm communication branch, and generating external rescue prompts. These external rescue prompts may include at least one of the following: the current position of the car, insufficient power supply status, door zone distance, trapped status, communication status, and suggested rescue method, and are sent to the elevator rescue platform or maintenance terminal via the rescue communication module.

[0097] In one example, if the maximum output power of the backup power supply is only 900W, while the peak power of the drive circuit at low speed is 1600W, then even if the energy that can be released is greater than the total energy required, the power supply to the drive circuit can be stopped, while the power supply to the lighting circuit (40W), communication circuit (15W), and alarm communication branch (10W) is maintained. The external rescue prompt message "The car is located between the 4th and 5th floors, 1.8m away from the 5th floor door area, and the backup power supply output power is insufficient" is sent to the maintenance terminal.

[0098] When implementing the minimum safe load maintenance strategy, the tiered power supply control unit can maintain power supply only to the minimum safety-related loads such as emergency lighting, alarm communication, or location information upload, while cutting off power to drive circuits, door operator circuits, or other non-currently necessary loads. For example, general lighting and non-essential communication data uploads can be turned off, maintaining only 5W emergency lighting and 10W alarm communication loads to extend the operating time of the minimum safe load.

[0099] In one possible hardware implementation, the hierarchical power supply control unit can control the on / off status or output power of the drive power supply branch, brake power supply branch, door operator power supply branch, lighting power supply branch, and communication power supply branch separately through the emergency power supply management unit. The emergency power supply management unit can communicate with the elevator controller, backup power management module, and emergency communication module, and output corresponding power supply control commands to each power supply branch according to the emergency power supply strategy. Each power supply branch can be equipped with voltage detection, current detection, and overcurrent protection functions to monitor the actual load status during power supply control.

[0100] During the tiered power supply control process according to the emergency power supply strategy, at least one dynamic variable can be acquired in real time, including energy storage unit terminal voltage, output current, temperature, DC bus voltage, car speed, door zone detection signal, and door operator operating current. When the deviation between the dynamic variable and the corresponding predicted variable exceeds the preset deviation condition, the emergency power supply guarantee index is recalculated, and the emergency power supply strategy is adjusted based on the recalculated emergency power supply guarantee index.

[0101] In one possible implementation, the dynamic variable deviation can be determined as follows:

[0102] in, Indicates the deviation of dynamic variables; This represents the actual collected value of the dynamic variable; This represents the predicted value of the corresponding dynamic variable; This represents a preset minimum value used to avoid a denominator of zero. The preset deviation condition can be that the deviation of a dynamic variable is greater than a preset deviation threshold, for example, greater than 0.05, 0.08, or 0.10; different dynamic variables can correspond to different preset deviation thresholds.

[0103] In one example, during the low-speed movement phase, the predicted voltage at the energy storage unit terminal was 207V, while the actual voltage at the sampling terminal was 190V. If we take 0.01, then the dynamic variable deviation is:

[0104] If the preset deviation threshold is 0.05, it indicates that the actual voltage drop exceeds the predicted range. In this case, the tiered power supply control unit can reduce the output power of the drive circuit, shorten the target movement distance, or switch from a fast leveling priority strategy to a low-power waiting strategy.

[0105] In another example, during the door opening and passenger insertion phase, the predicted door operator operating current is 2.0A, while the actual operating current is 3.4A. If the preset deviation threshold for the door operator operating current is 0.30, then the door operator operating current deviation exceeds the preset deviation condition. In this case, repeated door opening and closing actions can be restricted, and priority can be given to maintaining power supply to the lighting and communication circuits, while simultaneously generating a door operator operation anomaly warning message.

[0106] After a rescue operation is completed or a rescue strategy switch ends, the rescue power supply management unit can record operational status data, power supply status data, energy storage status data, rescue load status data, rescue power supply guarantee index, the rescue power supply strategy adopted, and the execution status of each power supply branch during the current rescue event. This record can be used by maintenance personnel to assess the health status of the backup power supply and can also be used to update historical rescue power supply data, providing a basis for correcting subsequent data anomalies.

[0107] In one example, during a level-based rescue mission, the system predicted a total energy demand of 30.13Wh, while the actual energy consumption after the rescue was 34.8Wh. The difference mainly stemmed from the gantry crane's operating current being higher than the predicted value and the extended low-speed movement time. The system can record this rescue event as historical rescue power supply data and, under subsequent conditions of the same gantry crane status or similar load, improve the energy demand estimates for the gantry crane phase and the low-speed movement phase, making the subsequent rescue power supply guarantee index closer to the actual power supply demand.

[0108] Figure 3 This illustration shows a branch diagram of the emergency power supply strategy provided in an embodiment of this application. For example... Figure 3 As shown, after the power supply guarantee index is output by the guarantee index calculation unit, the hierarchical power supply control unit can determine different power supply strategies based on the range of the power supply guarantee index. When the power supply guarantee index meets the full rescue conditions, the full rescue power supply strategy is executed; when the power supply guarantee index meets the leveling and door opening conditions but does not meet the long-term maintenance condition of all loads, the fast leveling priority strategy is executed; when the power supply guarantee index is insufficient to support the drive circuit but can support low-power loads, the low-power waiting strategy is executed; when the power supply guarantee index only meets the minimum safe load maintenance condition, the minimum safe load maintenance strategy is executed.

[0109] It should be noted that the complete rescue conditions, leveling and door opening conditions, low-power load maintenance conditions, and minimum safe load maintenance conditions can be preset according to elevator type, rated load, backup power type, door operator power, lighting power, communication power, and rescue waiting time. These conditions are used to map the rescue power supply guarantee index to different power supply strategies and do not constitute a limitation on specific numerical ranges.

[0110] This application also provides a power supply guarantee system for elevator rescue. The system includes a data acquisition unit, a rescue mission identification unit, a power demand determination unit, a guarantee index calculation unit, and a hierarchical power supply control unit.

[0111] The data acquisition unit acquires the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data. The rescue task identification unit determines the current rescue task type based on the operating status data and power supply status data, and divides the current rescue task type into multiple rescue power supply stages. The power supply demand determination unit determines the staged power supply demand of the current rescue task based on the rescue load status data corresponding to each rescue power supply stage. The guarantee index calculation unit calculates the elevator's rescue power supply guarantee index based on the energy storage status data and the staged power supply demand. The hierarchical power supply control unit determines the corresponding rescue power supply strategy based on the rescue power supply guarantee index, and performs hierarchical power supply control on at least some circuits in the drive circuit, braking circuit, door operator circuit, lighting circuit, and communication circuit according to the rescue power supply strategy.

[0112] The aforementioned units can be implemented using hardware circuits, by a processor executing computer programs stored in memory, or by a combination of hardware circuits and software programs. Data exchange between the units can occur via bus, serial communication interface, industrial Ethernet, fieldbus, or the elevator controller's internal communication interface.

[0113] This application also provides an electronic device, which may include a processor, a memory, and a communication interface. The memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described elevator rescue power supply guarantee method. The electronic device may be a controller in an elevator control cabinet, a rescue power supply management terminal, an edge computing gateway, or a monitoring terminal communicatively connected to the elevator control system.

[0114] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps of the above-described elevator rescue power supply guarantee method. The computer-readable storage medium may include a read-only memory, a random access memory, flash memory, a hard disk, or other media capable of storing program code.

[0115] Through the above implementation methods, this application embodiment correlates the elevator operating status, power supply status, energy storage status, and rescue load status during the rescue power supply guarantee process. First, it determines the current rescue task type and multiple rescue power supply stages. Then, it calculates the staged power supply demand and the rescue power supply guarantee index. Finally, it executes tiered power supply control based on the rescue power supply guarantee index. This process enables the backup power supply capacity to match the current rescue task requirements and corrects the power supply strategy based on dynamic variable deviations during the rescue process, thereby forming a closed loop of rescue power supply judgment, execution, and feedback.

[0116] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0117] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0118] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for ensuring power supply during elevator rescue, characterized in that, include: Acquire the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data; The current rescue mission type is determined based on the operational status data and power supply status data, and the current rescue mission type is divided into multiple rescue power supply stages. Based on the rescue load status data corresponding to each rescue power supply stage, determine the phased power supply requirements of the current rescue mission; Based on the energy storage status data and the phased power supply demand, calculate the rescue power supply guarantee index of the elevator; Based on the rescue power supply guarantee index, a corresponding rescue power supply strategy is determined, and at least some of the circuits in the drive circuit, braking circuit, gantry circuit, lighting circuit and communication circuit are subjected to graded power supply control in accordance with the rescue power supply strategy. The current rescue mission type is determined based on the operational status data and power supply status data, including: Based on the current position of the car, the direction of car travel, the car load, the door zone distance, the door lock status, the safety circuit status, and the type of power supply anomaly, determine whether the elevator is in a non-door zone stop, a door zone stop, a low-speed controllable operation, or a control circuit holding state. Based on the determined results, the current rescue mission type is determined to be one of the following: driving level rescue mission, door opening guarantee mission, low power waiting mission, or control and hold rescue mission. Based on the energy storage status data and the phased power supply demand, the rescue power supply guarantee index of the elevator is calculated, including: The energy storage unit's releaseable energy, maximum output power, terminal voltage drop, sustainable power supply time, and health correction factor are determined based on the energy storage status data. Based on the phased power supply requirements, determine the required energy, peak power, minimum operating voltage, and duration for each rescue power supply phase; Calculate the energy margin, power margin, voltage stability margin, and time guarantee margin respectively, and use the health correction coefficient to correct at least one of the energy margin, power margin, voltage stability margin, and time guarantee margin to obtain the rescue power supply guarantee index. During the process of hierarchical power supply control according to the rescue power supply strategy, at least one dynamic variable among the energy storage unit terminal voltage, output current, temperature, DC bus voltage, car speed, door zone detection signal and door operator operating current is acquired in real time. When the deviation between the dynamic variable and the corresponding predicted variable exceeds the preset deviation condition, the rescue power supply guarantee index is recalculated, and the rescue power supply strategy is adjusted according to the recalculated rescue power supply guarantee index.

2. The method according to claim 1, characterized in that, Acquire elevator operation status data, power supply status data, energy storage status data, and rescue load status data, including: The operational status data, power supply status data, energy storage status data, and rescue load status data are time-marked according to the same rescue time scale. Based on the time stamp, the operating status data, power supply status data, energy storage status data, and rescue load status data are mapped to the same rescue event; And according to the multiple rescue power supply stages corresponding to the current rescue mission type, establish the association between each rescue power supply stage and the corresponding data.

3. The method according to claim 1, characterized in that, In the event of missing data collection, abrupt changes in values, or inconsistencies in the power supply status data or energy storage status data, the available output energy, available output power, or voltage drop corresponding to the energy storage status data is corrected based on the elevator's historical rescue power supply data, the most recent energy storage self-test data, and the preset safety margin. The rescue power supply guarantee index is then calculated based on the corrected energy storage status data.

4. The method according to claim 1, characterized in that, According to the rescue power supply strategy, at least some circuits among the drive circuit, braking circuit, gantry circuit, lighting circuit, and communication circuit are subject to hierarchical power supply control, including: The on / off status or output power of the drive power supply branch, brake power supply branch, gantry power supply branch, lighting power supply branch and communication power supply branch are controlled by the rescue power supply management unit respectively. The rescue power supply management unit is communicatively connected to the elevator controller, the backup power management module, and the rescue communication module, and outputs corresponding power supply control commands to each power supply branch according to the rescue power supply strategy.

5. The method according to claim 1, characterized in that, The rescue power supply strategy includes at least one of the following: complete rescue power supply strategy, fast leveling priority strategy, low power consumption waiting strategy, and minimum safe load maintenance strategy. Specifically, when executing the complete rescue power supply strategy, power is supplied to the control circuit, drive circuit, braking circuit, door operator circuit, lighting circuit, and communication circuit; When implementing the rapid leveling priority strategy, power is preferentially supplied to the drive circuit, braking circuit and gantry circuit, and power supply to non-essential loads is limited; When executing the low-power waiting strategy or the minimum safe load maintenance strategy, priority is given to maintaining power supply to at least one of the lighting circuit, communication circuit, and alarm circuit, and external rescue prompt information is generated.

6. The method according to claim 1, characterized in that, The operating status data includes at least one of the following: car position, car speed, car load, door zone signal, door lock signal, and safety circuit signal; The power supply status data includes at least one of the following: mains input status, control circuit voltage, drive circuit voltage, door machine circuit voltage, and communication circuit voltage. The energy storage status data includes at least one of the following: remaining energy of the energy storage unit, terminal voltage, output current, internal resistance, temperature, number of cycles, and historical discharge curve.

7. A power supply guarantee system for elevator rescue, implemented using the power supply guarantee method for elevator rescue as described in claim 1, characterized in that, It includes a data acquisition unit, a rescue mission identification unit, a power supply demand determination unit, a guarantee index calculation unit, and a tiered power supply control unit; The data acquisition unit is used to acquire the elevator's operating status data, power supply status data, energy storage status data, and rescue load status data. The rescue mission identification unit is used to determine the current rescue mission type based on the operating status data and power supply status data, and to divide the current rescue mission type into multiple rescue power supply stages. The power demand determination unit is used to determine the phased power demand of the current rescue mission based on the rescue load status data corresponding to each rescue power supply phase. The guarantee index calculation unit is used to calculate the rescue power supply guarantee index of the elevator based on the energy storage status data and the phased power supply demand. The hierarchical power supply control unit is used to determine the corresponding rescue power supply strategy according to the rescue power supply guarantee index, and to perform hierarchical power supply control on at least some of the circuits in the drive circuit, braking circuit, gantry circuit, lighting circuit and communication circuit according to the rescue power supply strategy.

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