Elevator power supply control device based on dual power supply

Abstract

The present invention relates to the technical field of elevator power supply, and in particular to an elevator power supply control device based on a dual power supply, including a data acquisition module, a data analysis module, a load optimization module and a correction module. The present invention can effectively optimize the use of power resources and improve the stability and reliability of the elevator system through precise real-time monitoring and dynamic adjustment mechanisms. During peak hours, the system can intelligently identify and respond to load changes and power shortages of the elevator, and ensure the stability and safety of the elevator operation by adjusting the backup power supply switching ratio and optimizing the voltage setting. Through flexible power management, not only the risk of system failures caused by power fluctuations is reduced, but also the elevator operation efficiency is improved, ultimately achieving efficient use of energy and reducing operating costs, and effectively solving the problem of being unable to timely discover and respond to abnormal conditions of the elevator due to the low degree of real-time collection of the elevator's own operating parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator power supply, and in particular to an elevator power supply control device based on dual power supplies. Background Art

[0002] With the acceleration of urbanization and the continuous emergence of high-rise buildings, elevators, as an indispensable means of vertical transportation in these buildings, are becoming increasingly important in terms of safety, reliability and energy efficiency. In order to meet these growing demands, the intelligence and automation of elevator power management systems have become a key direction for the development of the industry.

[0003] Patent document with publication number CN115765140A discloses a control system for an elevator without power outage, the system comprising: a rectifier, an energy storage battery, an inverter, a time control device, and a dual power conversion device; wherein the input end of the rectifier is used to be connected to a power grid, the rectifier, the energy storage battery, the inverter, the time control device, and the dual power conversion device are connected in sequence, the input end of the dual power conversion device is also used to be connected to the power grid, and the output end of the dual power conversion device is used to supply power to the elevator.

[0004] It can be seen that when the power grid fails, it may take a certain amount of time for the system to switch from the main power supply to the backup power supply, which may cause a brief power outage; and frequent switching between the power grid and the energy storage battery will reduce the energy efficiency of the system; the lack of comprehensive real-time monitoring of the elevator operating parameters makes it impossible to timely detect and respond to abnormal conditions of the elevator, such as overload, abnormal speed, etc., and without sufficient data support, it is difficult for the system to perform effective fault prediction and health status assessment, increasing the risk of elevator failure. Summary of the invention

[0005] To this end, the present invention provides an elevator power supply control device based on a dual power supply, so as to overcome the problem in the prior art that the elevator operation is unstable due to the slow response and poor flexibility of the switching action of the main and standby power supplies.

[0006] To achieve the above object, the present invention provides an elevator power supply control device based on dual power supplies, comprising:

[0007] A data acquisition module is used to collect the real-time load weight, real-time running speed and real-time voltage of the main power supply for each elevator in the monitoring area;

[0008] a data analysis module connected to the data acquisition module, comprising an overload determination unit, a voltage adjustment unit and a mode determination unit, wherein the overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, and to determine a long-term overload mode according to the duration of the overload state and the preset standard duration; the voltage adjustment unit is used to adjust a preset voltage of a voltage regulator connected to the main power supply according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration after determining the long-term overload mode to form a temporary voltage; the mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time running speed and the preset standard speed after the preset response time after the temporary voltage is formed, and to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in the overload state in the underpowered state and the preset standard number range;

[0009] a load optimization module, connected to the data acquisition module and the mode determination unit, respectively, for determining the backup power supply switching ratio according to the real-time load weight and the real-time operating speed in the partial switching power supply mode during a preset peak period;

[0010] The correction module is connected to the mode determination unit and the load optimization module respectively, and is used to adjust the preset response time according to the backup power supply switching ratio and the preset switching standard deviation within the preset correction time.

[0011] Further, the voltage regulating unit is used to adjust the preset voltage of the voltage regulator connected to the main power supply according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration in the long-term overload mode to form a temporary voltage, which includes:

[0012] The voltage regulation unit is used to calculate the standard deviation of all the real-time voltages within the preset power duration in the long-term overload mode to obtain the voltage standard deviation. When the voltage standard deviation is greater than the preset overload voltage fluctuation value, the preset voltage is adjusted according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage.

[0013] Furthermore, the voltage regulating unit is used to adjust the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value, and the preset voltage regulation coefficient to form a temporary voltage, including:

[0014] The voltage regulating unit is used to calculate the average value of the real-time voltage according to the real-time voltage and the preset power duration to form an average voltage. When the average voltage is greater than the preset average voltage, the preset voltage is reduced according to the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage.

[0015] Furthermore, the voltage regulating unit is used to adjust the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value, and the preset voltage regulation coefficient to form a temporary voltage, and further includes:

[0016] The voltage regulating unit is used to increase the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage when the average voltage is less than or equal to the preset average voltage.

[0017] Further, the mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time operating speed after the preset response time after the temporary voltage is formed and the preset standard speed, including:

[0018] The mode determination unit is used to determine that the main power supply is in an insufficient power state when the real-time operating speed is greater than the preset standard speed.

[0019] Further, the mode determination unit is used to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in an overload state in the power shortage state and a preset standard number range, including:

[0020] The mode determination unit is used for determining that the switching mode is a partial switching power mode when the number is within the preset standard number range.

[0021] Further, the load optimization module is used to determine the backup power supply switching ratio according to the real-time load weight and the real-time operating speed in the partial switching power supply mode during the preset peak period, including:

[0022] The load optimization module is used to calculate the load standard deviation according to the preset peak period and the real-time load weight, and calculate the speed standard deviation according to the preset peak period and the real-time operating speed. When the load standard deviation is greater than the preset load standard deviation threshold and the speed standard deviation is greater than the preset speed standard deviation threshold, the backup power supply switching ratio is calculated according to the load standard deviation, the preset load standard deviation threshold, the speed standard deviation, the preset speed standard deviation threshold and the preset switching ratio coefficient.

[0023] Furthermore, the correction module is used to adjust the preset response time according to the backup power supply switching ratio and the preset switching standard deviation within the preset correction time, including:

[0024] The correction module is used to calculate the standard deviation of the backup power supply switching ratio within a preset correction time to obtain the switching ratio standard deviation. When the switching ratio standard deviation is greater than the preset switching standard deviation, the preset response time is increased according to the switching ratio standard deviation, the preset switching standard deviation and the preset correction coefficient.

[0025] Furthermore, the overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, including:

[0026] The overload determination unit is used to determine that the elevator whose real-time load weight is greater than the preset standard weight is in an overload state.

[0027] Furthermore, the overload determination unit is used to determine the long-term overload mode according to the duration of the overload state and the preset standard duration, including:

[0028] The overload determination unit is used to determine that the overload mode of the overload state whose duration is greater than a preset standard duration is a long-term overload mode.

[0029] Compared with the prior art, the beneficial effect of the present invention is that, through precise real-time monitoring and dynamic adjustment mechanisms, the use of power resources can be effectively optimized, and the stability and reliability of the elevator system can be improved. During peak hours, the system can intelligently identify and respond to load changes and power shortages of the elevator, and ensure the smoothness and safety of the elevator operation by adjusting the backup power switching ratio and optimizing the voltage setting. Through flexible power management, not only the risk of system failures caused by power fluctuations is reduced, but also the elevator operation efficiency is improved, the service life of the equipment is extended, and ultimately the efficient use of energy and the reduction of operating costs are achieved, effectively solving the problem of being unable to timely discover and respond to abnormal conditions of the elevator due to the low degree of real-time collection of the elevator's own operating parameters.

[0030] Furthermore, by real-time monitoring and adjusting the voltage, voltage fluctuations in the power system can be effectively dealt with, and the power stability of the elevator system under long-term overload conditions can be improved.

[0031] Furthermore, by reducing the voltage, the system stability is maintained, while the reliability and safety of the power supply system are improved, ensuring the normal operation of the elevator system under load and voltage fluctuations.

[0032] Furthermore, by increasing the voltage of the main power supply, the stability and power supply capacity of the power supply are improved, thereby avoiding the normal operation of the elevator being affected by low voltage.

[0033] Furthermore, by accurately determining the power shortage status, the system can take corresponding measures, such as adjusting the power configuration or starting the backup power supply, to ensure the stable operation of the elevator system and avoid elevator performance degradation or failure due to power shortage.

[0034] Furthermore, by dynamically adjusting the power configuration according to the actual load conditions, it is possible to prevent system overload or unnecessary energy waste that may be caused by excessive switching of power modes.

[0035] Furthermore, by analyzing the standard deviation of load and speed and adjusting the power switching ratio when the standard deviation exceeds a preset threshold, the load optimization module can intelligently adjust the power configuration during peak hours to prevent system overload and reduce energy waste.

[0036] Furthermore, through the dynamic adjustment mechanism, the correction module helps to improve the adaptability and stability of the elevator power supply system, and can reduce the frequent power switching caused by excessive fluctuations in the power switching ratio, thereby reducing energy waste and equipment loss.

[0037] Furthermore, by avoiding overload operation, the wear of mechanical parts can be reduced, the service life of the elevator can be extended, while the safety of passengers is guaranteed and potential risks caused by overload are avoided.

[0038] Furthermore, by identifying long-term overload patterns, the elevator power system can more effectively manage power resources and optimize elevator performance. This continuous monitoring helps prevent equipment damage caused by long-term overload operation while ensuring safe operation of elevators under high load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic diagram of an elevator power supply control device based on dual power supplies in this embodiment;

[0040] Figure 2 A decision logic diagram for adjusting a preset voltage by the voltage regulating unit of this embodiment;

[0041] Figure 3 This is a decision logic diagram of the voltage regulation unit of this embodiment adjusting the preset voltage according to the real-time voltage;

[0042] Figure 4 This is a decision logic diagram of the mode determination unit in this embodiment for determining the switching mode according to the real-time voltage. DETAILED DESCRIPTION

[0043] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0045] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1 As shown, it is a schematic diagram of an elevator power supply control device based on dual power supplies in this embodiment;

[0048] This embodiment provides an elevator power supply control device based on dual power supplies, including:

[0049] A data acquisition module is used to collect the real-time load weight, real-time running speed and real-time voltage of the main power supply of each elevator in the monitoring area. The monitoring area is the area where the elevator system of the commercial building is located;

[0050] a data analysis module connected to the data acquisition module, comprising an overload determination unit, a voltage adjustment unit and a mode determination unit, wherein the overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, and to determine a long-term overload mode according to the duration of the overload state and the preset standard duration; the voltage adjustment unit is used to adjust a preset voltage of a voltage regulator connected to the main power supply according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration in the long-term overload mode to form a temporary voltage; the mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time running speed and the preset standard speed after the temporary voltage is formed after the preset response time, and to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in an overloaded state in the underpowered state and the preset standard number range;

[0051] A load optimization module, connected to the data acquisition module and the data analysis module respectively, for determining a backup power supply switching ratio according to the real-time load weight and the real-time operating speed in the partial switching power supply mode during a preset peak period;

[0052] The correction module is connected to the data analysis module and the load optimization module respectively, and is used to adjust the preset response time according to the backup power supply switching ratio and the preset switching standard deviation within the preset correction time.

[0053] A voltage regulator is a device used to maintain the stability of the output voltage of a power supply. Its basic function is to ensure that the power supply voltage remains within a set range when the load changes or the input voltage fluctuates. Usually, a linear regulator or a switching regulator is used. This embodiment uses a switching regulator LM2596, which is suitable for applications that require high efficiency and high power. In this embodiment, the preset voltage is determined according to the design voltage of the elevator system and is set to the standard operating voltage of the system, 220V. The preset voltage of the voltage regulator is adjusted to cope with the instability caused by voltage fluctuations in the elevator under long-term overload mode. By adjusting the preset voltage of the voltage regulator, it can be ensured that the voltage output remains stable under overload conditions, avoiding abnormal elevator operation caused by voltage fluctuations, and ensuring the reliability and safety of the system. This can effectively reduce the impact of voltage fluctuations on the main power supply and ensure the smooth operation of the elevator when overloaded.

[0054] The backup power switching ratio is usually expressed as a ratio or percentage, indicating the proportion of the load that the backup power source bears when the main power source cannot meet the load demand. For example, if the backup power switching ratio is 30%, it means that the backup power source will be responsible for providing 30% of the power when there is a problem with the main power source. Setting the backup power switching ratio helps optimize the stability and reliability of the power system. By setting this ratio reasonably, it can be ensured that the backup power source can appropriately share the load when the main power fails or the load changes, avoiding power supply interruptions or unstable elevator operation. The calculation of the backup power switching ratio is usually based on load changes, system requirements, and operating status. For example, during peak hours or under heavy load conditions, the backup power switching ratio may need to be increased to ensure reliable power supply to the system.

[0055] The preset standard weight refers to the standard weight of the elevator under normal load, which depends on the rated load capacity of the elevator and is usually set to 80% of the maximum load of the elevator. In this embodiment, it is set to 1000 kg, which can avoid damage to the elevator due to overload.

[0056] The preset standard duration is used to determine whether the overload state continues, which depends on the operating frequency of the elevator and is usually set to 1-2 minutes. In this embodiment, it is set to 90 seconds, which can react quickly and avoid system damage caused by long-term overload.

[0057] The preset power duration is a time window for voltage regulation, which depends on the operation cycle of the elevator and is usually set to 5-10 minutes. In this embodiment, it is 5 minutes to ensure sufficient time for effective voltage regulation.

[0058] The preset overload voltage fluctuation value is a threshold value for determining whether the voltage needs to be adjusted, which depends on the voltage stability of the elevator and is usually set to 4%. In this embodiment, it is set to 4%, which can improve the voltage adjustment accuracy of the elevator when it is overloaded.

[0059] The preset response time is the system reaction time after voltage regulation, which depends on the system processing capacity and is usually 30 seconds to 1 minute. In this embodiment, it is 45 seconds, which can ensure the response speed while maintaining the stability of the system.

[0060] The preset standard speed is the running speed of the elevator under normal circumstances, which depends on the elevator design specifications and is usually set to 1-1.5 m / s. In this embodiment, it is set to 1.2 m / s to ensure that the elevator can run efficiently and safely.

[0061] The underpower state is entered when the actual running speed of the elevator is lower than the preset standard speed, depending on the power supply situation.

[0062] The preset standard number range is the range of elevator numbers used to determine whether to enter the partial power switching mode, which depends on the system scale and is usually set to 2-6 elevators. In this embodiment, it is set to 3-5 to ensure that power can be effectively distributed during peak hours.

[0063] The partial switching power supply mode is triggered when the power is insufficient and some elevators are overloaded, depending on the number of elevators and the load conditions. In this embodiment, the partial switching mode can reduce the main power supply load and improve system stability.

[0064] The preset peak time is a time period when the elevator is used more frequently, which depends on the use nature of the building, usually the morning and evening peak hours. In this embodiment, it is 7:00-9:00 or 17:00-19:00, and the duration is 2 hours to cope with the commuting peak of the office building.

[0065] The backup power supply switching ratio is the load distribution ratio between the primary and backup power supplies.

[0066] The preset correction time is a correction period for adjusting the response time, which depends on the operation stability of the elevator system and is usually 5-10 minutes. In this embodiment, it is set to 6 minutes, which can quickly respond to changes in the power switching ratio.

[0067] The preset switching standard deviation is a threshold for evaluating the stability of the backup power switching ratio, which depends on the voltage and load fluctuations of the system and is usually 3%-5%. In this embodiment, it is set to 3%, which can improve the accuracy of the switching process.

[0068] The data acquisition module collects the load weight, running speed and main power supply voltage of each elevator in real time, and the data analysis module adjusts the voltage according to the overload status, long-term overload mode and voltage fluctuation value. When the main power supply is insufficient, the system determines whether to enter the partial power switching mode through the mode determination unit. The load optimization module dynamically adjusts the switching ratio of the main and standby power supplies according to the elevator load and running speed during peak hours, and the correction module further optimizes the switching ratio and response time according to the preset correction time.

[0069] Through precise real-time monitoring and dynamic adjustment mechanisms, the use of power resources can be effectively optimized and the stability and reliability of the elevator system can be improved. During peak hours, the system can intelligently identify and respond to load changes and power shortages in the elevator, and ensure the smoothness and safety of the elevator operation by adjusting the backup power switching ratio and optimizing the voltage setting. Flexible power management not only reduces the risk of system failures caused by power fluctuations, but also improves the elevator operation efficiency and extends the service life of the equipment, ultimately achieving efficient use of energy and reducing operating costs, and effectively solving the problem of being unable to timely detect and respond to abnormal conditions of the elevator due to the low level of real-time collection of the elevator's own operating parameters.

[0070] Please continue reading Figure 2 As shown, it is a decision logic diagram of the voltage regulating unit adjusting the preset voltage in this embodiment;

[0071] Specifically, the voltage regulating unit is used to adjust the preset voltage of the voltage regulator connected to the main power source according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration in the long-term overload mode to form a temporary voltage, which includes:

[0072] The voltage regulation unit is used to calculate the standard deviation of all the real-time voltages within the preset power duration in the long-term overload mode to obtain the voltage standard deviation. When the voltage standard deviation is greater than the preset overload voltage fluctuation value, the preset voltage is adjusted according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value, and the preset voltage regulation coefficient to form a temporary voltage.

[0073] The preset overload voltage fluctuation value is a parameter used to adjust the main power supply voltage in an overload state. It indicates the voltage fluctuation range allowed during the voltage regulation process, and is mainly used to determine whether the voltage needs to be adjusted and the adjustment range. It mainly depends on the power demand and load characteristics of the system, and is usually set to a range of 5% to 10% of the actual voltage. In this embodiment, it is set to 6% to 8% of the voltage. The voltage stability can be maintained in an overload state to prevent excessive voltage fluctuations from causing damage to the elevator system and power supply equipment.

[0074] The preset voltage adjustment coefficient is a proportional factor used to adjust the amplitude of the main power supply voltage change. It depends on the voltage stability requirements of the system and the responsiveness of the power supply. It is usually set between 0.1 and 0.5, determined according to system requirements and actual conditions. In this embodiment, it is specifically set to 0.2. It can balance the sensitivity of voltage adjustment and the stability of the system, ensure that the voltage can be effectively adjusted when it fluctuates, and avoid over-adjustment.

[0075] In the long-term overload mode, the voltage regulation unit calculates the voltage standard deviation by analyzing the real-time voltage data within the preset power duration. When the standard deviation exceeds the preset overload voltage fluctuation value, the system adjusts the preset voltage of the main power supply according to the real-time voltage, voltage standard deviation, preset overload voltage fluctuation value and preset voltage regulation coefficient to generate a temporary voltage. This adjustment process ensures that the voltage is appropriately corrected within the fluctuation range to cope with changes in power demand.

[0076] Real-time monitoring and voltage adjustment can effectively cope with voltage fluctuations in the power system and improve the power stability of the elevator system under long-term overload conditions.

[0077] Please continue reading Figure 3 As shown, it is a decision logic diagram of the voltage regulating unit of this embodiment adjusting the preset voltage according to the real-time voltage;

[0078] Specifically, the voltage adjustment unit is used to adjust the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value, and the preset voltage adjustment coefficient to form a temporary voltage, including:

[0079] The voltage regulating unit is used to calculate the average value of the real-time voltage according to the real-time voltage and the preset power duration to form an average voltage. When the average voltage is greater than the preset average voltage, the preset voltage is reduced according to the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage adjustment coefficient to form a temporary voltage, wherein A'=A×[1-k×(S-S0) / S0], A' is the temporary voltage, A is the preset voltage, k is the preset voltage adjustment coefficient, S is the voltage standard deviation, and S0 is the preset overload voltage fluctuation value.

[0080] The voltage regulation unit calculates the average voltage based on the real-time voltage and the preset power duration. If the average voltage is higher than the preset average voltage, the preset voltage of the main power supply is reduced by considering the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage. This process is designed to optimize the voltage level and prevent equipment overload or system instability due to excessive voltage.

[0081] By reducing the voltage, the system stability is maintained, while the reliability and safety of the power supply system are improved, ensuring the normal operation of the elevator system under load and voltage fluctuations.

[0082] Specifically, the voltage adjustment unit is used to adjust the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value, and the preset voltage adjustment coefficient, and the temporary voltage is formed, and further includes:

[0083] The voltage regulating unit is used to increase the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage when the average voltage is less than or equal to the preset average voltage, wherein A'=A×[1+k×(S-S0) / S0].

[0084] When adjusting the main power supply voltage, the voltage regulation unit first calculates the average value of the real-time voltage in the long-term overload mode and compares it with the preset average voltage. If the average voltage is less than or equal to the preset average voltage, the system will increase the preset voltage of the main power supply according to the real-time voltage, the calculated voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage.

[0085] By increasing the voltage of the main power supply, the stability and power supply capacity of the power supply can be improved, thereby avoiding the normal operation of the elevator being affected by low voltage.

[0086] Specifically, the mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time operating speed after the preset response time after the temporary voltage is formed and the preset standard speed, including:

[0087] The mode determination unit is used to determine that the main power supply is in an insufficient power state when the real-time operating speed is greater than the preset standard speed.

[0088] The mode determination unit monitors the real-time running speed after the preset response time after the temporary voltage is formed, and compares it with the preset standard speed. If the real-time running speed is greater than the preset standard speed, it is determined that the main power supply is in an underpowered state.

[0089] By accurately judging the power shortage status, the system can take corresponding measures, such as adjusting the power configuration or starting the backup power supply, to ensure the stable operation of the elevator system and avoid elevator performance degradation or failure due to power shortage.

[0090] Please continue reading Figure 4 As shown, it is a decision logic diagram of the mode determination unit of this embodiment determining the switching mode according to the real-time voltage;

[0091] Specifically, the mode determination unit is used to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in an overload state in an underpowered state and a preset standard number range, including:

[0092] The mode determination unit is used to determine that the switching mode is a partial switching power mode when the number is within the preset standard number range;

[0093] The mode determination unit is further configured to determine that the switching mode is a full switching power mode when the number is greater than a maximum value of the preset standard number range;

[0094] The mode determination unit is further configured to determine that switching is not required when the number is less than a minimum value of the preset standard number range.

[0095] The mode determination unit counts the number of elevators in overload state under power shortage and compares the number with the preset standard number range. If the number is within the preset range, the system determines that the current switching mode is the partial switching power mode, so as to optimize the use of power supply and ensure the stability of the system.

[0096] By dynamically adjusting the power configuration according to the actual load conditions, it is possible to prevent system overload or unnecessary energy waste caused by excessive switching of power modes.

[0097] Specifically, the load optimization module is used to determine the backup power supply switching ratio according to the real-time load weight and the real-time operating speed in the partial switching power supply mode during the preset peak period, including:

[0098] The load optimization module is used to calculate the load standard deviation according to the preset peak period and the real-time load weight, and calculate the speed standard deviation according to the preset peak period and the real-time operating speed. When the load standard deviation is greater than the preset load standard deviation threshold and the speed standard deviation is greater than the preset speed standard deviation threshold, the backup power supply switching ratio is calculated according to the load standard deviation, the preset load standard deviation threshold, the speed standard deviation, the preset speed standard deviation threshold and the preset switching ratio coefficient, wherein R=W×[(σL-σL0) / σL0]+(1-W)×[(σV-σV0) / σV0], R is the backup power supply switching ratio, W is the preset switching ratio coefficient, σL is the load standard deviation, σL0 is the preset load standard deviation threshold, σV is the speed standard deviation, and σV0 is the preset speed standard deviation threshold.

[0099] The preset load standard deviation threshold is a standard used to determine whether the elevator load fluctuation exceeds the normal range. It depends on the design load range of the elevator and the stability of the operating environment, and is usually set at 5% to 10% of the maximum load of the elevator. In this embodiment, it is specifically set to 8% of the rated load of the elevator. The advantage of this setting is that it can reflect load abnormalities in a timely manner, avoid frequent power switching of the system due to small fluctuations, and improve the operating stability of the elevator.

[0100] The preset speed standard deviation threshold is a standard for judging whether the elevator running speed fluctuation exceeds the normal range. It is usually set according to the design speed of the elevator and the expected operating conditions. In this embodiment, it is set to 10% of the design speed, which can reduce the impact and wear on the mechanical parts of the elevator, thereby extending the service life of the elevator.

[0101] The load optimization module first calculates the standard deviation of load and speed based on the real-time load weight and running speed data during the preset peak period. If the load standard deviation exceeds the preset threshold and the speed standard deviation also exceeds the preset threshold, these standard deviation values ​​and the preset switching ratio coefficient are used to calculate the switching ratio of the backup power supply to optimize the power supply configuration and ensure the stability and efficiency of power supply during peak hours.

[0102] By analyzing the standard deviation of load and speed and adjusting the power switching ratio when the standard deviation exceeds the preset threshold, the load optimization module can intelligently adjust the power configuration during peak hours to prevent system overload and reduce energy waste.

[0103] Specifically, the correction module is used to adjust the preset response time according to the backup power supply switching ratio and the preset switching standard deviation within the preset correction time, including:

[0104] The correction module is used to calculate the standard deviation of the backup power supply switching ratio within the preset correction time to obtain the switching ratio standard deviation. When the switching ratio standard deviation is greater than the preset switching standard deviation, the preset response time is increased according to the switching ratio standard deviation, the preset switching standard deviation and the preset correction coefficient, wherein T'=T×[1+Q×(σR-σR0) / σR0], T' is the increased preset response time, T is the preset response time, Q is the preset correction coefficient, σR is the switching ratio standard deviation, and σR0 is the preset switching standard deviation.

[0105] The preset correction factor is a multiplier for adjusting the preset response time, which depends on the system's sensitivity to power switching ratio fluctuations and historical operating data. Usually, this factor is adjusted based on actual operating experience and system requirements, and there is no fixed value. In this embodiment, the preset correction factor is set to 0,5. Such a setting helps to moderately extend the response time without significantly affecting the elevator response speed to adapt to the fluctuation of the power switching ratio, thereby improving the stability of the system and the flexibility of power management.

[0106] The correction module plays a dynamic adjustment role in the elevator power supply system. It evaluates the fluctuation of the power supply switching ratio by calculating the standard deviation of the backup power supply switching ratio within the preset correction time. When this standard deviation exceeds the preset switching standard deviation, it means that the fluctuation of the power supply switching ratio is large, and a more flexible response strategy may be required to adapt to this change. At this time, the correction module will adjust the preset response time according to the standard deviation of the switching ratio, the preset switching standard deviation, and a preset correction factor. This adjustment enables the system to respond more flexibly to changes in power demand in actual operation, thereby optimizing the power management strategy.

[0107] According to the fluctuation of the backup power switching ratio and the preset switching standard deviation, the correction module adjusts the preset response time. The specific adjustment method is to increase the response time. When the backup power switching ratio fluctuates greatly, increasing the response time can give the system more time to adapt to power changes. The relationship between the volatility of the backup power switching ratio and the preset response time is that the volatility of the backup power switching ratio affects the system's adaptability to power switching. In order to ensure that the system can operate stably under these fluctuations, it is necessary to adapt to these fluctuations by adjusting the preset response time. This adjustment ensures that the system can effectively respond to changes in power and load in actual operation, and optimizes the overall performance and reliability of the elevator power supply system.

[0108] Through the dynamic adjustment mechanism, the correction module helps to improve the adaptability and stability of the elevator power supply system. It can reduce the frequent power switching caused by excessive fluctuations in the power switching ratio, thereby reducing energy waste and equipment loss.

[0109] Specifically, the overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, including:

[0110] The overload determination unit is used to determine that the elevator whose real-time load weight is greater than the preset standard weight is in an overload state.

[0111] The elevator is overloaded by comparing the real-time load weight of the elevator with the preset standard weight. When the real-time load weight exceeds the preset standard weight, the unit will mark the elevator as overloaded, thereby triggering the corresponding control strategy.

[0112] By avoiding overload operation, the wear of mechanical parts can be reduced, the service life of the elevator can be extended, while the safety of passengers can be guaranteed and potential risks caused by overload can be avoided.

[0113] Specifically, the overload determination unit is used to determine the long-term overload mode according to the duration of the overload state and the preset standard duration, including:

[0114] The overload determination unit is used to determine that the overload mode of the overload state whose duration is greater than a preset standard duration is a long-term overload mode.

[0115] After the overload determination unit detects that the real-time load weight of the elevator exceeds the preset standard weight, it will continue to track the duration of this overload state. If the duration of the overload state exceeds the standard duration preset by the system, the unit will determine that this overload state is a long-term overload mode, and this determination will serve as the basis for subsequent operations and adjustments.

[0116] By identifying long-term overload patterns, the elevator power system can more effectively manage power resources and optimize elevator performance. This continuous monitoring helps prevent equipment damage caused by long-term overload operation while ensuring safe operation of elevators under high load conditions.

[0117] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0118] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An elevator power supply control device based on dual power supplies, characterized in that: include: A data acquisition module is used to collect the real-time load weight, real-time running speed and real-time voltage of the main power supply for each elevator in the monitoring area; a data analysis module connected to the data acquisition module, comprising an overload determination unit, a voltage adjustment unit and a mode determination unit, wherein the overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, and to determine a long-term overload mode according to the duration of the overload state and the preset standard duration; the voltage adjustment unit is used to adjust a preset voltage of a voltage regulator connected to the main power supply according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration after determining the long-term overload mode to form a temporary voltage; the mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time running speed and the preset standard speed after the preset response time after the temporary voltage is formed, and to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in the overload state in the underpowered state and the preset standard number range; a load optimization module, connected to the data acquisition module and the mode determination unit, respectively, for determining the backup power supply switching ratio according to the real-time load weight and the real-time operating speed in the partial switching power supply mode during a preset peak period; a correction module, connected to the mode determination unit and the load optimization module respectively, for adjusting the preset response time according to the backup power supply switching ratio and the preset switching standard deviation within the preset correction time; The voltage regulating unit is used to adjust the preset voltage of the voltage regulator connected to the main power source according to all the real-time voltages and the preset overload voltage fluctuation value within the preset power duration in the long-term overload mode to form a temporary voltage, which includes: The voltage regulating unit is used to calculate the standard deviation of all the real-time voltages within a preset power duration in the long-term overload mode to obtain the voltage standard deviation; The preset overload voltage fluctuation value is a parameter used to adjust the main power supply voltage under overload conditions; The preset voltage regulation coefficient is a proportional factor used to adjust the magnitude of the change in the main power supply voltage; The voltage regulating unit is used to calculate the average value of the real-time voltage according to the real-time voltage and the preset power duration to form an average voltage. When the average voltage is greater than the preset average voltage, the preset voltage is reduced according to the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage, wherein A'=A×[1-k×(S-S0) / S0], A' is the temporary voltage, A is the preset voltage, k is the preset voltage regulation coefficient, S is the voltage standard deviation, and S0 is the preset overload voltage fluctuation value; The voltage regulating unit is further used to increase the preset voltage according to the real-time voltage, the voltage standard deviation, the preset overload voltage fluctuation value and the preset voltage regulation coefficient to form a temporary voltage when the average voltage is less than or equal to the preset average voltage, wherein A'=A×[1+k×(S-S0) / S0]; The load optimization module is used to calculate the load standard deviation according to the preset peak period and the real-time load weight, calculate the speed standard deviation according to the preset peak period and the real-time operating speed, and when the load standard deviation is greater than the preset load standard deviation threshold, and the speed standard deviation is greater than the preset speed standard deviation threshold, calculate the backup power supply switching ratio according to the load standard deviation, the preset load standard deviation threshold, the speed standard deviation, the preset speed standard deviation threshold and the preset switching ratio coefficient, wherein R=W×[(σL-σL0) / σL0]+(1-W)×[(σV-σV0) / σV0], R is the backup power supply switching ratio, W is the preset switching ratio coefficient, σL is the load standard deviation, σL0 is the preset load standard deviation threshold, σV is the speed standard deviation, and σV0 is the preset speed standard deviation threshold; The correction module is used to calculate the standard deviation of the backup power supply switching ratio within the preset correction time to obtain the switching ratio standard deviation. When the switching ratio standard deviation is greater than the preset switching standard deviation, the preset response time is increased according to the switching ratio standard deviation, the preset switching standard deviation and the preset correction coefficient, wherein T'=T×[1+Q×(σR-σR0) / σR0], T' is the increased preset response time, T is the preset response time, Q is the preset correction coefficient, σR is the switching ratio standard deviation, and σR0 is the preset switching standard deviation.

2. The elevator power supply control device based on dual power supply according to claim 1, characterized in that: The mode determination unit is used to determine whether the main power supply is in an underpowered state according to the real-time operating speed after the preset response time after the temporary voltage is formed and the preset standard speed, including: The mode determination unit is used to determine that the main power supply is in an insufficient power state when the real-time operating speed is greater than the preset standard speed.

3. The elevator power supply control device based on dual power supply according to claim 2, characterized in that: The mode determination unit is used to determine whether the switching mode is a partial switching power supply mode according to the number of all elevators in an overload state in a power shortage state and a preset standard number range, including: The mode determination unit is used for determining that the switching mode is a partial switching power mode when the number is within the preset standard number range.

4. The elevator power supply control device based on dual power supply according to claim 3 is characterized in that: The overload determination unit is used to determine whether each of the elevators is in an overload state according to the real-time load weight and the preset standard weight, and includes: The overload determination unit is used to determine that the elevator whose real-time load weight is greater than the preset standard weight is in an overload state.

5. The elevator power supply control device based on dual power supply according to claim 4, characterized in that: The overload determination unit is used to determine the long-term overload mode according to the duration of the overload state and the preset standard duration, including: The overload determination unit is used to determine that the overload mode of the overload state whose duration is greater than a preset standard duration is a long-term overload mode.

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