CN115296428A - Traction type elevator energy recovery method and equipment based on flywheel energy storage system - Google Patents
Traction type elevator energy recovery method and equipment based on flywheel energy storage system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
- H02J1/16—Balancing the load in a network using dynamo-electric machines coupled to flywheels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Abstract
The invention provides a traction type elevator energy recovery method and equipment based on a flywheel energy storage system, wherein the flywheel energy storage system is connected into a power supply circuit of a traction type elevator; judging the running state of the traction type elevator in the working process of the traction type elevator; and acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state of the traction type elevator and the real-time electric energy storage quantity of the flywheel energy storage system. According to the invention, the recovery and the reutilization of the braking energy of the traction type elevator can be realized by utilizing the charge-discharge characteristic of the flywheel energy storage system, compared with the traditional mode of setting high-power resistor consumption, the energy is obviously saved, and the reduction of the power quality of a power grid caused by using a large amount of feedback devices can be avoided; in addition, the flywheel energy storage system has long cycle life and low maintenance cost, and can reduce the whole life cost of the whole elevator.
Description
Technical Field
The invention relates to the technical field of energy recovery, in particular to a traction type elevator energy recovery method, a device, equipment and a storage medium based on a flywheel energy storage system.
Background
With the continuous development of social economy, the urbanization level of China is continuously improved, and more high-rise buildings are newly added in cities, so that the elevators are used as essential vertical lifting equipment for the high-rise buildings, and the number of the elevators is rapidly increased. In public places with large population mobility (such as hotels, office buildings and the like), the power consumption of the elevator accounts for about 15 to 25 percent of the power consumption of the whole building, is only slightly lower than the total power consumption of various air conditioners and is far higher than the total power consumption of other electrical equipment serving the building except the air conditioners. With the increasing number of high-rise buildings, the problems of energy conservation and consumption reduction of elevators have attracted general attention of all social circles. How to reduce the energy consumption of the elevator and improve the energy-saving efficiency of the elevator is a very significant research topic.
The running process of the elevator is a process of continuously exchanging energy with the outside. When the elevator runs downwards under light load or runs upwards under heavy load, the elevator system obtains electric energy from the power grid, and then the driving host drives the traction sheave to generate traction force to drive the elevator to run upwards and downwards, and finally the traction force is converted into load (passenger) potential energy, counterweight potential energy, heat energy and the like. When the elevator runs upwards under light load or runs downwards under heavy load, the traction machine is in a braking power generation state, and the generated current is generally consumed in a heat dissipation mode through a braking resistor on a direct current bus. This kind of mode both caused the rising of elevator machine room temperature, made energy useless again and wasted, had caused the energy again waste again for equipment such as the air conditioner fan that the machine room cooling increased simultaneously. Therefore, if the wasted energy can be recovered and released and utilized in the process of ascending with heavy load and descending with light load of the elevator, the temperature of the elevator machine room can be greatly reduced, and the problem of energy waste can be solved.
The existing traction elevator mainly adopts the technologies of frequency conversion control, a permanent magnet synchronous motor, energy feedback and the like to solve the problem of energy waste. For variable frequency control and permanent magnet synchronous motors, the energy waste condition of the elevator is still serious due to the defects that the weight of the counterweight is fixed, the motor has a continuous power generation state and the like. The energy feedback power grid technology is an energy recycling technology based on frequency conversion and speed regulation, and the electric energy generated by braking and generating of a traction machine is fed back to an alternating current power grid or is supplied to electrical equipment nearby through an energy feedback unit. Because the power fluctuation of the elevator is large in the actual operation process, if the peak current of the electric energy fed back to the power grid is too large, the peak current of the electric energy causes large impact on the power grid, and the safety of the power grid is influenced. In addition, the ammeter has no reverse flow function, and the electric energy fed back to the power grid does not reduce the use cost of the elevator, so that the popularization difficulty of the energy feedback technology is high.
Disclosure of Invention
The invention provides a traction type elevator energy recovery method, a device, equipment and a storage medium based on a flywheel energy storage system, aiming at realizing the recovery and the reutilization of the braking energy of a traction type elevator by utilizing the charge-discharge characteristic of a magnetic suspension flywheel energy storage system, obviously saving energy and avoiding the reduction of the electric energy quality of a power grid after a large amount of feedback devices are used; the maintenance cost is low, and the whole life cost of the whole elevator can be reduced.
Therefore, a first technical object of the present invention is to provide a method for recovering energy of a traction type elevator based on a flywheel energy storage system, comprising:
connecting a flywheel energy storage system into a power supply circuit of a traction type elevator;
judging the running state of the traction type elevator in the working process of the traction type elevator;
and acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state and the real-time electric energy storage quantity of the traction type elevator.
The flywheel energy storage system comprises a flywheel converter and an energy storage flywheel; wherein, the first and the second end of the pipe are connected with each other,
the flywheel converter is connected in parallel with two ends of a traction motor inverter of the traction type elevator; the energy storage flywheel is connected in parallel with two ends of the flywheel converter.
Wherein, in the step of judging the running state of the traction type elevator, the running state of the traction type elevator is determined based on the load condition of a lift car of the traction type elevator and the counterweight of the traction type elevator; wherein, the first and the second end of the pipe are connected with each other,
in the upward state of the elevator car,
if the self weight and the load capacity of the elevator car are less than the counter weight, judging that the elevator car is in a light-load ascending running state;
if the self weight and the load capacity of the lift car are larger than the counterweight, the running state of heavy load ascending is judged;
in the state of the elevator car going downwards,
if the self weight and the load capacity of the lift car are larger than the counterweight, the running state of heavy load descending is judged;
and if the self weight of the car plus the load capacity is less than the counterweight, determining the running state of the light-load descending.
Wherein, in the step of acquiring the real-time electric quantity stored in the flywheel energy storage system,
rotational energy of flywheel
And J is the moment of inertia of the rotor,
is the rotor angular velocity;
wherein for a rotor with a uniform mass distribution,
，
m is the rotor mass, R is the rotor radius, and n is the rotor speed;
the rotating speed of the rotor when the flywheel is fully charged is n in the running process max The rotor speed in standby is n min Then, then
The energy storage capacity of the flywheel energy storage system is represented as
。
Wherein, in the running state and the real-time electric quantity of storage based on towing formula elevator, the step of adjustment flywheel energy storage system's operating condition includes:
when the running state of the traction type elevator is light-load ascending or heavy-load descending and the electric storage quantity of the flywheel energy storage system is in a first preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; when the electric storage quantity of the flywheel energy storage system is in a second preset electric storage quantity range outside the first preset electric storage quantity range, the flywheel energy storage system executes charging action;
when the running state of the traction type elevator is heavy-load ascending or light-load descending and the electric storage quantity of the flywheel energy storage system is in a third preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; and when the electric storage quantity of the flywheel energy storage system is in a fourth preset electric storage quantity range outside the third preset electric storage quantity range, the flywheel energy storage system executes a discharging action.
Wherein, except for fault or other abnormal conditions, the flywheel energy storage system always works between standby and maximum rotation speed, and the standby rotation speed is the minimum rotation speed n min The flywheel energy storage system can be in a state of being discharged by available electric quantity, and the flywheel energy storage system can not discharge and only can charge at the rotating speed; maximum speed n max The flywheel energy storage system is in a fully charged state, and the flywheel energy storage system is discharged and cannot be charged at the rotating speed.
When the flywheel energy storage system executes charging action, the flywheel energy storage system is charged until the electric storage capacity is 100%; when the flywheel energy storage system executes the discharging action, the electricity is discharged until the electricity storage quantity is 0.
The second technical purpose of the invention is to provide a traction type elevator energy recovery device based on a flywheel energy storage system, which comprises:
the connecting module is used for connecting the flywheel energy storage system into a power supply circuit of the traction type elevator;
the judging module is used for judging the running state of the traction type elevator in the working process of the traction type elevator;
and the energy recovery module is used for acquiring the real-time electricity storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state and the real-time electricity storage quantity of the traction type elevator so as to recover the energy of the traction type elevator.
A third object of the present invention is to provide an electronic apparatus, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to perform the steps of the method of the preceding claims.
A fourth object of the present invention is to propose a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the steps of the method according to the aforementioned technical solution.
Compared with the prior art, the method for recovering the energy of the traction type elevator based on the flywheel energy storage system provided by the invention has the advantages that the flywheel energy storage system is connected into a power supply circuit of the traction type elevator; judging the running state of the traction type elevator in the working process of the traction type elevator; and acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state and the real-time electric energy storage quantity of the traction type elevator. The invention can utilize the charge-discharge characteristic of the magnetic suspension flywheel energy storage system to realize the recovery and the reutilization of the braking energy of the traction type elevator, has obvious energy saving compared with the traditional mode of setting high-power resistance consumption, and can avoid the reduction of the power quality of a power grid after using a large amount of feedback devices; in addition, the magnetic suspension flywheel energy storage system has long cycle life and low maintenance cost, and can reduce the whole life cost of the whole elevator.
Drawings
The invention and/or additional aspects and advantages will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow diagram of a traction type elevator energy recovery method based on a flywheel energy storage system provided by the invention.
Fig. 2 is a schematic diagram of a setting of connecting a flywheel energy storage system to a power supply circuit of a traction type elevator in the energy recovery method of the traction type elevator based on the flywheel energy storage system.
Fig. 3 is a schematic structural diagram of a traction type elevator energy recovery device based on a flywheel energy storage system provided by the invention.
FIG. 4 is a block diagram of a non-transitory computer readable storage medium storing computer instructions according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Fig. 1 is a method for recovering energy of a traction type elevator based on a flywheel energy storage system according to an embodiment of the present invention. The method comprises the following steps:
s110: and connecting the flywheel energy storage system into a power supply circuit of the traction type elevator.
The flywheel energy storage system comprises a flywheel converter and an energy storage flywheel; the flywheel converter is connected to two ends of a traction motor inverter of the traction elevator in parallel; the energy storage flywheel is connected in parallel with two ends of the flywheel converter. The flywheel energy storage system adopts a five-degree-of-freedom full magnetic suspension system, and the continuous charging and discharging time is not less than 10 seconds.
The traction type elevator power supply circuit is shown in figure 2, a rectifier, a filter capacitor, a flywheel converter of a flywheel energy storage system and an inverter of a traction type elevator traction motor are arranged in parallel to form a loop; the energy storage flywheel is connected with the flywheel converter in parallel, and the traction motor is connected with the inverter in parallel; the alternating current of the power grid is connected into the loop. Through the arrangement, the flywheel energy storage system is connected into a power supply circuit of the traction type elevator.
S120: and judging the running state of the traction type elevator in the working process of the traction type elevator.
Determining the running state of the traction type elevator based on the load condition of a traction type elevator car and the counterweight of the traction type elevator; the invention relates to a counterweight which is contained in a self weight balance system of a traction type elevator, and the counterweight has the function of reducing the power of a traction motor and the torque on a traction sheave and a worm wheel. The weight balance system of the elevator is provided with the compensation device so as to balance the length change of the steel wire ropes and the travelling cables on the car side and the counterweight side when the elevator runs.
In the judgment process of the running state, the data of the load capacity is sensed through a sensing system of the traction type elevator, and the running state is divided into the following four types by combining the self weight of the lift car, the counterweight weight and the running direction of the traction type elevator:
in the upward state of the elevator car,
if the self weight and the load capacity of the lift car are less than the counter weight, the lift car is judged to be in a light-load ascending running state;
if the self weight and the load capacity of the elevator car are larger than the counterweight, the elevator car is judged to be in a heavy-load ascending running state;
in the state of the elevator car going downwards,
if the self weight and the load capacity of the lift car are larger than the counterweight, the running state of heavy load descending is judged;
and if the self weight of the car plus the load capacity is less than the counterweight, determining the running state of descending under light load.
S130: and acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state and the real-time electric energy storage quantity of the traction type elevator.
In the step of acquiring the real-time electric energy storage amount of the flywheel energy storage system,
rotational energy of flywheel
And J is the moment of inertia of the rotor,
is the rotor angular velocity;
wherein for a rotor with a uniform mass distribution,
，
m is the rotor mass, R is the rotor radius, and n is the rotor speed;
the rotor speed is n when the flywheel is fully charged in the running process max The rotor speed in standby is n min Then, then
Electric quantity storage of flywheel energy storage system
。
Wherein, except for fault or other abnormal conditions, the flywheel energy storage system always works between standby and maximum rotating speed, and the standby rotating speed is the lowest rotating speed n min The flywheel energy storage system can be in an empty state with available electric quantity, and the flywheel energy storage system can not discharge and only can charge at the rotating speed; maximum speed n max The flywheel energy storage system is in a fully charged state, and the flywheel energy storage system is discharged and cannot be charged at the rotating speed.
In the step based on the running state and the real-time electric storage capacity of traction formula elevator, the operating condition of adjustment flywheel energy storage system, include:
when the running state of the traction type elevator is light-load ascending or heavy-load descending and the electric storage quantity of the flywheel energy storage system is in a first preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; when the electric storage quantity of the flywheel energy storage system is in a second preset electric storage quantity range outside the first preset electric storage quantity range, the flywheel energy storage system executes charging action; in the invention, the first preset electric energy storage range is set to be more than or equal to 95 percent
Less than or equal to 100 percent, if the electric quantity stored in the flywheel energy storage system is less than or equal to 95 percent
The energy storage system of the flywheel does not act, and the electric energy of the power grid is converted into the kinetic energy of the running of the elevator through a traction motor of the traction type elevator; the second preset electric power storage range is set to be less than or equal to 0
Less than 95 percent, if the electric quantity stored in the flywheel energy storage system is less than or equal to 0
Less than 95 percent, and the traction motor of the traction type elevator feeds back the electric quantity to be used for charging an energy storage flywheel of a flywheel energy storage system, thereby effectively preventing the impact of the fed back electric quantity on a power grid and protecting the operation safety of the power grid.
When the running state of the traction type elevator is heavy-load ascending or light-load descending and the electric storage quantity of the flywheel energy storage system is in a third preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; and when the electric storage quantity of the flywheel energy storage system is in a fourth preset electric storage quantity range outside the third preset electric storage quantity range, the flywheel energy storage system executes a discharging action. In the present invention, the third predetermined electricity storage amount range is set to 0 or less
Less than or equal to 5 percent, if the electric quantity stored in the flywheel energy storage system is less than or equal to 0
The energy storage system of the flywheel does not act and converts the electric energy of the power grid into the kinetic energy for the operation of the elevator through a traction motor of the traction type elevator when the energy storage system of the flywheel does not act; the fourth preset electric power storage range is set to
More than 5%, if the flywheel energy storage system has the stored electric quantity of
More than 5 percent, the energy storage flywheel of the flywheel energy storage system discharges, and the energy storage flywheel is released and utilized in the ascending and descending processes of the elevator under heavy load, so that the temperature of an elevator machine room can be greatly reduced, and the problem of energy waste can be solved.
When the flywheel energy storage system executes the charging action, the flywheel energy storage system is charged until the electric storage capacity is 100%; when the flywheel energy storage system executes the discharging action, the electricity is discharged until the electricity storage quantity is 0.
As shown in fig. 3, the present invention provides a traction type elevator energy recovery device based on a flywheel energy storage system, comprising:
the connection module 310 is used for connecting the flywheel energy storage system into a power supply circuit of the traction type elevator;
the judging module 320 is used for judging the running state of the traction type elevator in the working process of the traction type elevator;
and the energy recovery module 330 is configured to obtain the real-time power storage amount of the flywheel energy storage system, and adjust the working state of the flywheel energy storage system based on the running state and the real-time power storage amount of the traction elevator, so as to recover energy of the traction elevator.
In order to implement the embodiment, the present invention further provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps of the traction elevator energy recovery method of the aforementioned technical solution.
As shown in fig. 4, the non-transitory computer readable storage medium includes a memory 810 of instructions, an interface 830, the instructions executable by the processor 820 to perform a method according to the traction elevator energy recovery. Alternatively, the storage medium may be a non-transitory computer readable storage medium, for example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
In order to implement the embodiments, the invention also proposes a non-transitory computer-readable storage medium on which a computer program is stored which, when executed by a processor, implements traction elevator energy recovery as an embodiment of the invention.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the described embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
One of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of implementing the embodiments described herein may be implemented by hardware associated with instructions of a program, which may be stored in a computer-readable storage medium, and which, when executed, includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
The mentioned storage medium may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the embodiments described herein without departing from the scope of the invention.
Claims (10)
1. A traction type elevator energy recovery method based on a flywheel energy storage system is characterized by comprising the following steps:
connecting a flywheel energy storage system into a power supply circuit of a traction type elevator;
judging the running state of the traction type elevator in the working process of the traction type elevator;
and acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state of the traction type elevator and the real-time electric energy storage quantity.
2. The traction type elevator energy recovery method based on the flywheel energy storage system is characterized in that the flywheel energy storage system comprises a flywheel converter and an energy storage flywheel; wherein the content of the first and second substances,
the flywheel converter is connected to two ends of a traction motor inverter of the traction type elevator in parallel; the energy storage flywheel is connected in parallel with two ends of the flywheel converter.
3. The traction type elevator energy recovery method based on the flywheel energy storage system according to claim 1, wherein in the step of determining the operation state of the traction type elevator, the operation state of the traction type elevator is determined based on the load condition of the traction type elevator car and the counterweight of the traction type elevator; wherein the content of the first and second substances,
in the upward state of the elevator car,
if the self weight and the load capacity of the lift car are less than the counter weight, the lift car is judged to be in a light-load ascending running state;
if the self weight and the load capacity of the lift car are larger than the counterweight, the running state of heavy load ascending is judged;
in the state of the elevator car going downwards,
if the self weight and the load capacity of the lift car are larger than the counterweight, the running state of heavy load descending is judged;
and if the self weight of the car plus the load capacity is less than the counterweight, determining the running state of descending under light load.
4. The traction type elevator energy recovery method based on the flywheel energy storage system according to claim 1, wherein in the step of obtaining the real-time energy storage amount of the flywheel energy storage system,
rotational energy of flywheel
And J is the moment of inertia of the rotor,
is the rotor angular velocity;
wherein for a rotor with a uniform mass distribution,
，
m is the rotor mass, R is the rotor radius, and n is the rotor speed;
the rotor speed is n when the flywheel is fully charged in the running process max The rotor speed in standby is n min Then, then
The energy storage capacity of the flywheel energy storage system is represented as
。
5. The traction type elevator energy recovery method based on the flywheel energy storage system according to claim 4, wherein the step of adjusting the working state of the flywheel energy storage system based on the running state of the traction type elevator and the real-time power storage amount comprises:
when the running state of the traction type elevator is light-load ascending or heavy-load descending and the electric storage quantity of the flywheel energy storage system is in a first preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; when the electric storage quantity of the flywheel energy storage system is in a second preset electric storage quantity range outside the first preset electric storage quantity range, the flywheel energy storage system executes charging action;
when the running state of the traction type elevator is heavy-load ascending or light-load descending and the electric storage quantity of the flywheel energy storage system is in a third preset electric storage quantity range, the flywheel energy storage system does not execute charging and discharging actions; and when the electric storage quantity of the flywheel energy storage system is in a fourth preset electric storage quantity range outside the third preset electric storage quantity range, the flywheel energy storage system executes a discharging action.
6. The traction type elevator energy recovery method based on the flywheel energy storage system as claimed in claim 4, wherein the flywheel energy storage system always works between a standby state and a maximum rotating speed under the condition of failure or other abnormal conditions, and the standby rotating speed is the lowest rotating speed n min The flywheel energy storage system can be in an empty state with available electric quantity, and the flywheel energy storage system can not discharge and only can charge at the rotating speed; maximum speed n max The flywheel energy storage system is in a fully charged state, and the flywheel energy storage system is discharged and cannot be charged at the rotating speed.
7. The traction type elevator energy recovery method based on the flywheel energy storage system according to claim 5, characterized in that when the flywheel energy storage system performs the charging action, the energy storage amount is charged to 100%; when the flywheel energy storage system executes the discharging action, the discharging is carried out until the stored electricity quantity is 0.
8. The utility model provides a tow formula elevator energy recuperation device based on flywheel energy storage system which characterized in that includes:
the connecting module is used for connecting the flywheel energy storage system into a power supply circuit of the traction type elevator;
the judging module is used for judging the running state of the traction type elevator in the working process of the traction type elevator;
and the energy recovery module is used for acquiring the real-time electric energy storage quantity of the flywheel energy storage system, and adjusting the working state of the flywheel energy storage system based on the running state of the traction type elevator and the real-time electric energy storage quantity so as to recover the energy of the traction type elevator.
9. An electronic device, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium having stored thereon computer instructions for causing a computer to perform the steps of the method according to any one of claims 1-7.
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| CN103241619A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Energy saving elevator and operation control method thereof |
| US20170137259A1 (en) * | 2015-11-18 | 2017-05-18 | Premco, Inc. | Regenerative electrical power supply for elevators |
| CN206538078U (en) * | 2017-02-14 | 2017-10-03 | 盾石磁能科技有限责任公司 | Flywheel energy storage energy saving system of elevator |
| CN111342530A (en) * | 2020-05-14 | 2020-06-26 | 沈阳微控新能源技术有限公司 | Self-adaptive charge and discharge control method for flywheel energy storage device and energy storage converter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241619A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Energy saving elevator and operation control method thereof |
| US20170137259A1 (en) * | 2015-11-18 | 2017-05-18 | Premco, Inc. | Regenerative electrical power supply for elevators |
| CN206538078U (en) * | 2017-02-14 | 2017-10-03 | 盾石磁能科技有限责任公司 | Flywheel energy storage energy saving system of elevator |
| CN111342530A (en) * | 2020-05-14 | 2020-06-26 | 沈阳微控新能源技术有限公司 | Self-adaptive charge and discharge control method for flywheel energy storage device and energy storage converter |
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Application publication date: 20221104 |