Super capacitor energy storage elevator energy saving system based on industrial big data

Abstract

The invention discloses a super capacitor energy storage elevator energy-saving system based on industrial big data. The super capacitor energy storage elevator energy-saving system comprises an elevator operation system network, an energy storage control terminal, a super capacitor module and a standby circuit module. The elevator operation system network comprises a plurality of independent elevator operation systems; the energy storage control terminal comprises an elevator operation data module and an intelligent distribution module, the elevator operation data module performs big data statistics and analysis on operation data of each elevator, and the intelligent distribution module comprises a pre-charging / discharging control unit; a frequency converter assembly is arranged between the parallel circuit and each traction driving assembly, and the parallel circuit and the bleeder circuit are respectively connected with the intelligent distribution module. The device can be installed in an existing elevator system, has good compatibility and is low in implementation difficulty, electric energy generated by descending of an elevator is collected and reused, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator energy storage, and in particular to a supercapacitor energy storage elevator energy-saving system based on industrial big data. Background Art

[0002] With the acceleration of urbanization, the number of high-rise buildings is increasing. As an important vertical transportation tool, the energy consumption of elevators has attracted widespread attention. Traditional elevator systems generate a large amount of braking energy during braking, which is consumed by discharge resistors. The generated energy is not effectively collected and reused, which poses a challenge to energy efficiency improvement and energy conservation.

[0003] In the prior art, supercapacitor energy storage elevators use the supercapacitor's charging and discharging electronic control system in conjunction with the power grid to automatically distribute and release the stored electrical energy when lightly loaded upward, heavily loaded downward, or in braking state to achieve energy saving. However, there are problems such as complex connection with the original elevator equipment and the inability to effectively utilize the stored electrical energy during power outages or other power failures.

[0004] Therefore, the existing elevator energy storage requires changing the original circuit system structure of the elevator system, which has great construction difficulty and cost; the stored energy cannot be effectively distributed, resulting in the problem that the stored electrical energy cannot be reasonably distributed. Summary of the invention

[0005] The purpose of the present invention is to provide a supercapacitor energy storage elevator energy-saving system based on industrial big data to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a supercapacitor energy storage elevator energy-saving system based on industrial big data, comprising an elevator operation system network, an energy storage control terminal, a supercapacitor module and a backup circuit module;

[0007] The elevator operation system network includes a plurality of independent elevator operation systems, each of which includes a traction drive component, an elevator operation circuit network and an elevator operation control terminal;

[0008] The elevator operation system network collects the operation data of each elevator through each elevator operation control terminal, and transmits the operation data to the elevator operation data module. The elevator operation data module performs big data statistics and analysis on the operation data of each elevator to obtain the elevator operation power consumption and power generation under different floors and load conditions, the elevator high-frequency use time period and the elevator idle time period.

[0009] The energy storage control terminal includes an elevator operation data module and an intelligent distribution module, wherein the elevator operation data module is respectively connected to each elevator operation control terminal, and the intelligent distribution module includes a pre-charge / discharge control unit;

[0010] The supercapacitor module is composed of a plurality of supercapacitor modules, and the plurality of supercapacitor modules are connected in parallel, and the standby circuit module includes a low-voltage control circuit, an emergency lighting circuit, an elevator shaft permanent lighting circuit and a maintenance lighting circuit;

[0011] Each elevator operation circuit network is connected to the supercapacitor module by a parallel circuit, and a frequency converter component is arranged between the parallel circuit and each traction drive component. The supercapacitor module is connected to the standby circuit module by a discharge circuit, and the parallel circuit and the discharge circuit are respectively connected to the intelligent distribution module.

[0012] Preferably, the intelligent distribution module also includes a protection switch and an external terminal block, the input end and the input end of the pre-charge / discharge control unit are respectively connected to the external terminal block, and the external terminal block is respectively connected to the parallel circuit and the discharge circuit, for controlling the on and off of the parallel circuit and the discharge circuit and allocating the on and off paths.

[0013] Preferably, the operation data includes operation frequency, load range, operation peak period, operation off-peak period, frequency of stopping floors, operation power consumption data, historical downtime and downtime.

[0014] Preferably, the AC output terminal and AC input terminal of the frequency converter component are respectively connected to the three-phase input terminal and input terminal of the traction drive component and the three-phase input terminal and output terminal of the parallel circuit;

[0015] The three-phase input end of the frequency converter component is also connected to the three-phase output end of the elevator operation circuit network, and the parallel circuit and the input end line of the elevator operation circuit network are connected in parallel. The frequency converter component and the parallel circuit are used to construct a bidirectional circuit connection of each traction drive component.

[0016] Preferably, each of the elevator operation systems further comprises a sensor assembly, wherein the sensor assembly comprises a weight sensor assembly and a distance sensor assembly, wherein the weight sensor assembly is used to measure the load-bearing weight of the elevator car, and the distance sensor assembly is used to measure the position of the elevator car in the elevator shaft.

[0017] Preferably, the intelligent allocation module sets the upper limit of the charge capacity of each supercapacitor module to 95-98% of the rated capacity, and the lower limit of the discharge capacity to 2-5% of the rated capacity.

[0018] The electric energy storage and distribution method comprises the following steps:

[0019] S1: When the elevator is heavily loaded and moving downward, the traction drive assembly rotates in the opposite direction to generate electrical energy, which is then transmitted to the parallel line through the inverter assembly. The elevator operation data module calculates the electrical energy data generated by the elevator car moving downward, and the intelligent allocation module allocates the energy based on the remaining capacity and allocation priority of each supercapacitor module in the supercapacitor module.

[0020] S2: The intelligent allocation module divides multiple supercapacitor modules into a backup power supply group and an energy storage group. The supercapacitor modules in the backup power supply group have the highest charging priority and the lowest discharging priority. The supercapacitor modules in the energy storage group have a lower charging priority than the backup power supply group, and the supercapacitor modules in the energy storage group have the highest discharging priority. Secondly, the intelligent allocation module regularly and randomly replaces the supercapacitor modules selected to form the backup power supply group.

[0021] S3: The intelligent allocation module firstly charges the supercapacitor module of the backup power supply group to the upper limit of the charge capacity, and then the supercapacitor modules of the remaining energy storage groups are charged in sequence.

[0022] The electric energy release and distribution method comprises the following steps:

[0023] SS1: The intelligent allocation module obtains the data analyzed by the elevator operation data module and the overall power storage capacity of the supercapacitor module to intelligently allocate power release. The power release priority of the supercapacitor module where the standby power supply group is located is lower than the power release priority of the supercapacitor module where the energy storage group is located.

[0024] SS2: When the storage capacity of the supercapacitor module is between 70% and 100%, the intelligent distribution module connects the supercapacitor module to the parallel circuit, and connects the power stored in the supercapacitor module to the elevator operation circuit network, so that the elevator can be powered by the stored power and the grid power.

[0025] When the capacity of the supercapacitor module is between 30% and 70%, the intelligent distribution module connects the supercapacitor module to the elevator operation circuit network only during non-elevator operation peak hours;

[0026] When the capacity of the supercapacitor module is less than 30%, the intelligent distribution module connects the supercapacitor module to the elevator operation circuit network only when the elevator is unloaded and moving upward or downward;

[0027] Until the total capacity of the supercapacitor module of the energy storage group is released to less than 5%, the energy release and distribution is stopped, and the supercapacitor module of the standby power supply group is kept fully loaded;

[0028] SS3: When the power grid fails or the elevator stops operating due to a fault, the intelligent distribution module prioritizes the supercapacitor module where the energy storage group is located for energy release based on the energy capacity of the supercapacitor module, leveling the elevator car and opening the door, and the backup circuit module has the highest power supply priority.

[0029] Preferably, in step SS3:

[0030] The optimal leveling distribution uses the elevator operation control terminal to identify the location of the car and the car load, calculates the power used for upward leveling and the power used for downward leveling, and takes the minimum value as the optimal leveling power distribution.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention adopts a parallel circuit to connect with the elevator operation circuit network, thereby reducing the construction difficulty and construction cost of the existing elevator operation circuit network modification, and effectively improving the applicability and installation flexibility of the elevator energy storage system.

[0033] 2. The present invention adopts an intelligent distribution module to achieve the effect of flexible storage and distribution of electric energy. The intelligent distribution module can combine the status and historical operation data of the elevator operation system network to perform industrial big data processing and analysis, generate electric energy storage and distribution plans, reduce energy waste and electric energy reuse value, and also ensure the reliable operation of the elevator operation system network. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the charging process of the supercapacitor module in the first embodiment of the present invention;

[0035] Figure 2 Schematic diagram of the discharge process of the supercapacitor module in the second embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1 and Figure 2 The present invention provides the following two embodiments:

[0038] A supercapacitor energy storage elevator energy-saving system based on industrial big data includes an elevator operation system network, an energy storage control terminal, a supercapacitor module and a backup circuit module.

[0039] The elevator operation system network includes multiple independent elevator operation systems, each of which includes a traction drive component, an elevator operation circuit network, and an elevator operation control terminal. The elevator operation system network collects the operation data of each elevator through each elevator operation control terminal, and each elevator operation system also includes a sensor component, which includes a weight sensor component and a distance sensor component. The weight sensor component is used to measure the load-bearing weight of the elevator car, and the distance sensor component is used to measure the position of the elevator car in the elevator shaft.

[0040] Operation data includes operation frequency, load range, operation peak period, operation off-peak period, frequency of stopping floors, operation power consumption data, historical downtime and downtime.

[0041] The operating data is transmitted to the elevator operation data module, which performs big data statistics and analysis on the operation data of each elevator to obtain the elevator operation power consumption and power generation under different floors and load conditions, the elevator high-frequency use time period and the elevator idle time period.

[0042] The energy storage control terminal includes an elevator operation data module and an intelligent distribution module. The elevator operation data module is connected to each elevator operation control terminal respectively. The intelligent distribution module includes a pre-charge / discharge control unit. The intelligent distribution module also includes a protection switch and an external terminal block. The input end and the input end of the pre-charge / discharge control unit are respectively connected to the external terminal block, and the external terminal block is respectively connected to the parallel circuit and the discharge circuit, which is used to control the on and off of the parallel circuit and the discharge circuit and distribute the on and off paths.

[0043] The supercapacitor module is composed of multiple supercapacitor modules, and multiple supercapacitor modules are connected in parallel. The backup circuit module includes a low-voltage control circuit, an emergency lighting circuit, an elevator shaft permanent lighting circuit, and a maintenance lighting circuit.

[0044] Each elevator operation circuit network is connected to the supercapacitor module by a parallel circuit, and a frequency converter component is arranged between the parallel circuit and each traction drive component, and the AC output terminal and AC input terminal of the frequency converter component are respectively connected to the three-phase input terminal and input terminal of the traction drive component and the three-phase input terminal and output terminal of the parallel circuit.

[0045] The three-phase input of the inverter assembly is also connected to the three-phase output of the elevator operation circuit network. The parallel circuit and the input line of the elevator operation circuit network are connected in parallel. The inverter assembly and the parallel circuit are used to build a two-way circuit connection for each traction drive assembly. On the basis of the elevator power system, by connecting the energy storage control terminal in parallel to the inverter DC bus, when the elevator car is lightly loaded up, heavily loaded down, or stopped at a floor, the elevator traction motor generates reverse power to feed back electric energy to the supercapacitor system connected in parallel to the inverter DC bus for storage.

[0046] When the elevator is heavily loaded going up or lightly loaded going down, the electric energy stored in the supercapacitor system is first used to supply energy to the traction motor through the inverter unit of the frequency converter. When the capacitor energy is released and the voltage is consistent with the AC voltage of the power grid after rectification, the power grid supplies energy to the traction motor, thus achieving energy saving of the elevator system.

[0047] The supercapacitor module and the backup circuit module are connected by a discharge circuit, and the parallel circuit and the discharge circuit are respectively connected to the intelligent distribution module to discharge the electric energy stored for a long time and ensure the normal use function of the supercapacitor module.

[0048] The use of parallel circuits to connect the elevator operation circuit network reduces the construction difficulty and cost of modifying the existing elevator operation circuit network, and effectively improves the applicability and installation flexibility of the elevator energy storage system.

[0049] The intelligent allocation module sets the upper limit of the charge capacity of each supercapacitor module to 95-98% of the rated capacity, and the lower limit of the discharge capacity to 2-5% of the rated capacity. The power storage mode of each supercapacitor module can be flexibly adjusted to avoid a single supercapacitor module being fully loaded or unloaded for a long time, which may affect the working reliability of the supercapacitor module. The continuous use of the supercapacitor modules in the supercapacitor module is conducive to ensuring the service life and reliability of the supercapacitor module.

[0050] Embodiment 1:

[0051] See also Figure 1 , an electric energy storage and distribution method, comprising the following steps:

[0052] S1: When the elevator is heavily loaded and moving downward, the traction drive assembly rotates in the opposite direction to generate electrical energy, which is transmitted to the parallel line through the inverter assembly. The elevator operation data module calculates the electrical energy data generated by the elevator car moving downward, and the intelligent allocation module allocates the energy based on the remaining capacity and allocation priority of each supercapacitor module in the supercapacitor module.

[0053] S2: The intelligent allocation module divides multiple supercapacitor modules into a backup power supply group and an energy storage group. The supercapacitor modules in the backup power supply group have the highest charging priority and the lowest discharging priority. The supercapacitor modules in the energy storage group have a lower charging priority than the backup power supply group, and the supercapacitor modules in the energy storage group have the highest discharging priority. Secondly, the intelligent allocation module periodically and randomly replaces the supercapacitor modules selected to form the backup power supply group.

[0054] S3: The intelligent allocation module firstly charges the supercapacitor module of the backup power supply group to the upper limit of the charge capacity, and then the supercapacitor modules of the remaining energy storage groups are charged in sequence.

[0055] Embodiment 2:

[0056] See also Figure 2 , the electric energy release and distribution method comprises the following steps:

[0057] SS1: The intelligent allocation module obtains the data analyzed by the elevator operation data module and the overall energy storage capacity of the supercapacitor module to intelligently allocate the energy release. The energy release priority of the supercapacitor module where the standby power supply group is located is lower than the energy release priority of the supercapacitor module where the energy storage group is located.

[0058] SS2: When the storage capacity of the supercapacitor module is between 70% and 100%, the intelligent distribution module connects the supercapacitor module to the parallel circuit, and connects the power stored in the supercapacitor module to the elevator operation circuit network, so that the elevator is powered by stored power and grid power.

[0059] When the capacity of the supercapacitor module is between 30% and 70%, the intelligent allocation module connects the supercapacitor module to the elevator operation circuit network only during non-elevator operation peak hours.

[0060] When the capacity of the supercapacitor module is less than 30%, the intelligent distribution module connects the supercapacitor module to the elevator operation circuit network only when the elevator is moving upward or downward without load.

[0061] Until the total capacity of the supercapacitor modules of the energy storage group is released to less than 5%, the energy release and distribution is stopped to keep the supercapacitor modules of the standby power supply group fully loaded.

[0062] SS3: When the power grid fails or the elevator stops operating due to a fault, the intelligent allocation module prioritizes the supercapacitor module where the energy storage group is located for energy release based on the energy capacity of the supercapacitor module, leveling the elevator car and opening the door, and the backup circuit module has the highest power supply priority. Reasonable energy release of the supercapacitor module can ensure that each supercapacitor module can be fully utilized.

[0063] Among them, the optimal leveling distribution uses the elevator operation control terminal to identify the location of the car and the car load, calculates the power used for upward leveling and the power used for downward leveling, and takes the minimum value as the optimal leveling power distribution.

[0064] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A supercapacitor energy storage elevator energy saving system based on industrial big data, characterized by: Including elevator operation system network, energy storage control terminal, super capacitor module and backup circuit module; The elevator operation system network includes a plurality of independent elevator operation systems, each of which includes a traction drive component, an elevator operation circuit network and an elevator operation control terminal; The elevator operation system network collects the operation data of each elevator through each elevator operation control terminal, and transmits the operation data to the elevator operation data module. The elevator operation data module performs big data statistics and analysis on the operation data of each elevator to obtain the elevator operation power consumption and power generation under different floors and load conditions, the elevator high-frequency use time period and the elevator idle time period. The energy storage control terminal includes an elevator operation data module and an intelligent distribution module, wherein the elevator operation data module is respectively connected to each elevator operation control terminal, and the intelligent distribution module includes a pre-charge / discharge control unit; The supercapacitor module is composed of a plurality of supercapacitor modules, and the plurality of supercapacitor modules are connected in parallel, and the standby circuit module includes a low-voltage control circuit, an emergency lighting circuit, an elevator shaft permanent lighting circuit and a maintenance lighting circuit; Each elevator operation circuit network is connected to the supercapacitor module by a parallel circuit, and a frequency converter component is arranged between the parallel circuit and each traction drive component. The supercapacitor module is connected to the standby circuit module by a discharge circuit, and the parallel circuit and the discharge circuit are respectively connected to the intelligent distribution module.

2. According to the supercapacitor energy storage elevator energy saving system based on industrial big data according to claim 1, it is characterized in that: The intelligent distribution module also includes a protection switch and an external terminal block. The input end and the input end of the pre-charge / discharge control unit are respectively connected to the external terminal block, and the external terminal block is respectively connected to the parallel circuit and the discharge circuit, for controlling the on and off of the parallel circuit and the discharge circuit and allocating the on and off paths.

3. According to the supercapacitor energy storage elevator energy saving system based on industrial big data as described in claim 1, it is characterized by: Operation data includes operation frequency, load range, operation peak period, operation off-peak period, frequency of stopping floors, operation power consumption data, historical downtime and downtime.

4. According to claim 1, a supercapacitor energy storage elevator energy saving system based on industrial big data is characterized in that: The AC output terminal and AC input terminal of the frequency converter component are respectively connected to the three-phase input terminal and input terminal of the traction drive component and the three-phase input terminal and output terminal of the parallel circuit; The three-phase input end of the frequency converter component is also connected to the three-phase output end of the elevator operation circuit network, and the parallel circuit and the input end line of the elevator operation circuit network are connected in parallel. The frequency converter component and the parallel circuit are used to construct a bidirectional circuit connection of each traction drive component.

5. According to claim 3, a supercapacitor energy storage elevator energy saving system based on industrial big data is characterized in that: Each of the elevator operation systems also includes a sensor assembly, which includes a weight sensor assembly and a distance sensor assembly. The weight sensor assembly is used to measure the load-bearing weight of the elevator car, and the distance sensor assembly is used to measure the position of the elevator car in the elevator shaft.

6. According to claim 1, a supercapacitor energy storage elevator energy saving system based on industrial big data is characterized in that: The intelligent distribution module sets the upper limit of the charge capacity of each super capacitor module to 95-98% of the rated capacity, and the lower limit of the discharge capacity to 2-5% of the rated capacity.

7. The method for storing and distributing electric energy in a supercapacitor energy storage elevator energy-saving system based on industrial big data according to any one of claims 1 to 6, characterized in that: The steps include: S1: When the elevator is heavily loaded and moving downward, the traction drive assembly rotates in the opposite direction to generate electrical energy, which is then transmitted to the parallel line through the inverter assembly. The elevator operation data module calculates the electrical energy data generated by the elevator car moving downward, and the intelligent allocation module allocates the energy based on the remaining capacity and allocation priority of each supercapacitor module in the supercapacitor module. S2: The intelligent allocation module divides multiple supercapacitor modules into a backup power supply group and an energy storage group. The supercapacitor modules in the backup power supply group have the highest charging priority and the lowest discharging priority. The supercapacitor modules in the energy storage group have a lower charging priority than the backup power supply group, and the supercapacitor modules in the energy storage group have the highest discharging priority. Secondly, the intelligent allocation module regularly and randomly replaces the supercapacitor modules selected to form the backup power supply group. S3: The intelligent allocation module firstly charges the supercapacitor module of the backup power supply group to the upper limit of the charge capacity, and then the supercapacitor modules of the remaining energy storage groups are charged in sequence.

8. The method for releasing and distributing electric energy of a supercapacitor energy storage elevator energy-saving system based on industrial big data according to any one of claims 1 to 6, characterized in that: The steps include: SS1: The intelligent allocation module obtains the data analyzed by the elevator operation data module and the overall power storage capacity of the supercapacitor module to intelligently allocate power release. The power release priority of the supercapacitor module where the standby power supply group is located is lower than the power release priority of the supercapacitor module where the energy storage group is located. SS2: When the storage capacity of the supercapacitor module is between 70% and 100%, the intelligent distribution module connects the supercapacitor module to the parallel circuit, and connects the power stored in the supercapacitor module to the elevator operation circuit network, so that the elevator can be powered by the stored power and the grid power. When the capacity of the supercapacitor module is between 30% and 70%, the intelligent distribution module connects the supercapacitor module to the elevator operation circuit network only during non-elevator operation peak hours; When the capacity of the supercapacitor module is less than 30%, the intelligent distribution module connects the supercapacitor module to the elevator operation circuit network only when the elevator is unloaded and moving upward or downward; Until the total capacity of the supercapacitor module of the energy storage group is released to less than 5%, the energy release and distribution is stopped, and the supercapacitor module of the standby power supply group is kept fully loaded; SS3: When the power grid fails or the elevator stops operating due to a fault, the intelligent distribution module prioritizes the supercapacitor module where the energy storage group is located for energy release based on the energy capacity of the supercapacitor module, leveling the elevator car and opening the door, and the backup circuit module has the highest power supply priority.

9. The method for releasing and distributing electric energy according to claim 8, characterized in that: In step SS3: The optimal leveling distribution uses the elevator operation control terminal to identify the location of the car and the car load, calculates the power used for upward leveling and the power used for downward leveling, and takes the minimum value as the optimal leveling power distribution.

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