CN116961201A - External potential energy recovery system and method for elevator - Google Patents
External potential energy recovery system and method for elevator Download PDFInfo
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- CN116961201A CN116961201A CN202310936503.9A CN202310936503A CN116961201A CN 116961201 A CN116961201 A CN 116961201A CN 202310936503 A CN202310936503 A CN 202310936503A CN 116961201 A CN116961201 A CN 116961201A
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- 238000011084 recovery Methods 0.000 title claims abstract description 98
- 238000005381 potential energy Methods 0.000 title claims abstract description 52
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- 239000003990 capacitor Substances 0.000 claims abstract description 60
- 230000005611 electricity Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 238000005265 energy consumption Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims description 19
- 238000009423 ventilation Methods 0.000 claims description 16
- 230000006855 networking Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 7
- 238000010248 power generation Methods 0.000 claims description 7
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- 230000007547 defect Effects 0.000 abstract description 6
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- 238000012360 testing method Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 5
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- 238000002474 experimental method Methods 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
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Classifications
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/16—Regulation of the charging current or voltage by variation of field
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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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 relates to an external potential energy recovery system and method of an elevator, wherein a potential energy recovery device comprises mechanical electricity recovery equipment connected with an elevator dragging machine, the mechanical electricity recovery equipment transmits recovered electric energy to a common power supply direct current bus through an inverter, the recovered electric energy on the common power supply direct current bus is connected with a super capacitor through a DC/DC converter, the super capacitor is connected with a power supply switching device through a controller, one end of the power supply switching device is connected with a common power supply, and the other end of the power supply switching device is connected with a recovered electric quantity energy consumption device; the system is characterized in that the system is integrally used for carrying out the maximum utilization of the recovered electric energy according to the remote monitoring processor, the recovered electric energy is optimally distributed and used according to the daily storage capacity of the super capacitor and the specific use condition of the elevator, the traditional defect and defect that excessive electric energy cannot be recovered are avoided, the turnover use efficiency of the recovered electric energy is effectively improved, and the energy-saving and environment-friendly effects are achieved.
Description
Technical Field
The invention relates to an energy-saving environment-friendly industry, in particular to an energy-saving elevator, and particularly relates to an external potential energy recovery system and method for an elevator.
Background
The energy-saving and emission-reducing comprehensive work needs to strengthen the energy-saving and emission-reducing technical support and the construction of a service system, and quickens the research, demonstration and popularization of energy-saving and emission-reducing commonality key technology. The urbanization process and population aging place a rigid demand on the elevator industry. In addition, although the real estate industry enters a stable growth stage, the existing building reforms the requirement of the elevator, and the update and maintenance of the elevator become a new growth point of the elevator market.
The power consumption of an elevator with a load of 750 kg is 15-22 ℃ per hour, which is equivalent to the consumption of one degree of power every 5 minutes; according to 0.52 yuan of electricity per degree, each elevator continuously runs for 10 hours in a 20-layer building every day, about 150-220 degrees of electricity is consumed, which is equivalent to 3 tens of thousands of yuan for one common elevator in one month, and 36 tens of thousands of yuan in one year; every 1 degree electricity is saved, which is equivalent to saving energy consumption of 0.4 kg of coal and 4 liters of purified water, and simultaneously reducing emission of 1 kg of carbon dioxide and 0.03 kg of sulfur dioxide. The super capacitor energy storage type elevator energy-saving system is limited by the high cost of the super capacitor in early stage, cannot realize large-area popularization, and the price of the super capacitor is greatly reduced nowadays, and the input and output effects are obvious and the market potential is huge as can be seen from the previous economic benefit analysis.
The traditional elevator energy storage device has the advantages that the storage amount of potential energy is small, the direct current power supply operation is finished due to the lack of a control device, in addition, the untimely loss of energy collection exists during use, a large part of potential energy cannot be timely utilized after being converted into electric energy for storage, and excessive electric quantity is discharged, so that the efficient energy recovery and the efficient reutilization cannot be achieved fundamentally.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the external potential energy recovery system and method for the elevator, which have the advantages of simple structure, convenient operation, energy conservation, environmental protection, effective reduction of carbon emission, efficient recovery and reutilization of potential energy of the elevator, power resource saving, efficient utilization of energy storage electric quantity, simple and easy operation and high intelligent degree, and are used for overcoming the defects in the prior art.
The technical scheme of the invention is realized as follows: the utility model provides an external potential energy recovery system of elevator, includes pulls the potential energy recovery unit that machine and elevator lighting apparatus, elevator display device and elevator ventilation equipment that install in the car are drawn with the elevator, potential energy recovery unit include and draw the mechanical electricity recovery unit that the machine is connected with the elevator, mechanical electricity recovery unit is carried the electric energy of retrieving to on the common power direct current bus through the DC-to-DC converter, the recovered electric energy on the common power direct current bus is connected with super capacitor through DC/DC converter, super capacitor is connected with power switching device through the controller, power switching device's one end is connected with common power, power switching device's the other end is connected with recovery electric quantity power consumption device.
The electric quantity recovery energy consumption device comprises an elevator action monitor arranged in a car, wherein the elevator action monitor is connected with a controller, the controller is connected with an emergency EPS through a power supply switching device, the emergency EPS is connected with emergency standby electric equipment, and the controller is connected with an elevator lighting device, an elevator display device and an elevator ventilation device through the power supply switching device.
The output end of the elevator dragging machine is connected with an elevator traction driving wheel, a traction rope is arranged on the elevator traction driving wheel, two ends of the traction rope are respectively connected with a balancing weight and a lift car, the input end of the mechanical electric recovery device is fixedly connected with the output end of a central rotating shaft of the elevator traction driving wheel, and an inverter is arranged on one side of the mechanical electric recovery device.
The inverter is connected with a common power supply direct current bus through a wire, and a bleeder resistor is arranged between the inverter and the common power supply direct current bus.
The common power supply direct current bus is connected with the rectifier through the frequency converter, and the rectifier is connected with an external common power supply provided with a common power supply ammeter.
One end of the DC/DC converter is connected with an energy-saving power supply ammeter which is arranged on a connecting line between the common power supply direct current bus and the DC/DC converter.
The DC/DC converter is connected with a super capacitor arranged in an external potential energy recovery box through a wire, the external potential energy recovery box is arranged on one side of the elevator dragging machine, an opening and closing door is arranged on the external potential energy recovery box, a display and a lock core are arranged on the opening and closing door, the super capacitor is arranged at the middle lower part of the external potential energy recovery box, and a controller is arranged in the external potential energy recovery box above the external potential energy recovery box.
The controller is connected with a networking data transceiver module of an independent power supply, the networking data transceiver module is connected with a remote monitoring processor through the Internet, residual electricity energy consumption operation software is installed in the remote monitoring processor, an elevator action monitor is connected with the remote monitoring processor through the controller, and a power supply switching starting device connected with the remote monitoring processor is arranged on one side of the controller.
The super capacitor is composed of three groups of super-capacity energy storage modules.
The potential energy recovery method of the external potential energy recovery system of the elevator comprises the following steps:
1) The external alternating current common power supply is converted into direct current through a rectifier, and the direct current is regulated through a frequency converter to drive an elevator dragging machine to operate, when a car moves up in a light load, moves down in a full load or stops in a braking mode in an elevator shaft, the elevator dragging machine drives an elevator traction driving wheel to rotate, the elevator traction driving wheel further drives mechanical electricity recovery equipment to rotate, the mechanical electricity recovery equipment is bidirectional rotary power generation equipment, and alternating current power is generated in the rotating process of the mechanical electricity recovery equipment;
2) The recovered alternating current electric energy is converted into direct current through an inverter and fed back to mechanical electric recovery equipment, so that the voltage of a direct current side is increased, the DC/DC converter transmits the fed back direct current electric energy to a super capacitor for storage, and when the super capacitor is in a full state, the extra recovered electric quantity is consumed by a bleeder resistor;
3) The super capacitor is connected with the controller, the controller is an independent power supply, the controller is connected with a networking data transceiver module of the independent power supply, an elevator action monitor installed in the elevator car is electrically connected with the controller, the elevator action monitor collects the service condition of the elevator car in real time and transmits collected data information to the remote monitoring processor through the networking data transceiver module, and the remote monitoring processor performs operation through residual power consumption operation software according to the collected data information and selects whether a power supply switching starting device needs to be started or not according to an operation result;
4) When the residual electric quantity in the super capacitor reaches a preset value, the power supply switching starting device starts the power supply switching device, and the recovered electric energy in the super capacitor is transmitted to a common power supply end to provide power for the elevator dragging machine;
5) When the residual electric quantity in the super capacitor is lower than a preset value, the power supply switching starting device starts the power supply switching device, the recovered electric energy in the super capacitor is transmitted to an emergency EPS end, emergency electric energy is provided for emergency standby electric equipment when the emergency EPS common power supply is powered off, and meanwhile, electric energy required by operation is provided for elevator lighting equipment, elevator display equipment and elevator ventilation equipment in the elevator car.
6) When the common power supply outside the elevator dragging machine is powered off, the electric energy recovered in the super capacitor is transmitted to the common power supply direct current bus through the DC/DC converter to provide electric energy for the elevator dragging machine, the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment.
The invention has the following specific beneficial effects: the invention utilizes the mechanical electricity recovery equipment connected with the elevator dragging machine to recover and convert the generated energy into electric energy to be stored through the super capacitor, and simultaneously utilizes the remote monitoring processor to control the controller, the controller is used for monitoring the action of the elevator, the electric energy storage and the use condition of the super capacitor are calculated according to the uploading data, the consumption of rich electric energy, the direct power supply of the elevator dragging machine, the emergency equipment power supply and the electric energy supply of the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment are implemented according to the final processing result, and the temporary electric energy use can be provided for the elevator dragging machine, the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment when the power supply outside the elevator dragging machine is powered off, so that the improvement of the safety coefficient of the elevator is ensured. The elevator energy-saving control system can convert mechanical energy into electric energy for implementation and storage in elevator operation, and can realize the maximized utilization of recovered electric energy integrally according to the remote monitoring processor, and the energy-saving control system is used in combination with external common electric energy, so that the recovered electric energy is optimally distributed and used according to the daily storage capacity of the super capacitor and the specific use condition of the elevator, the traditional defect and defect that excessive electric energy cannot be recovered are avoided, the turnover use efficiency of the recovered electric energy is effectively improved, and the energy-saving and environment-friendly effects are achieved.
Drawings
Fig. 1 is a schematic diagram of an external potential energy recovery tank structure of the invention.
Fig. 2 is a schematic diagram of a system demonstration structure of the present invention.
Fig. 3 is a schematic view of the structure of the mounting position of the components in the elevator shaft of the present invention.
Fig. 4 is a schematic view of a partially enlarged structure of fig. 3 according to the present invention.
Fig. 5 is a schematic diagram of a system connection structure according to the present invention.
FIG. 6 is a graph comparing power consumption data of a system test of the present invention for an eight day ladder operation.
FIG. 7 is a graph showing the change of electricity fee saving-fixed input time in the system test of the present invention.
Detailed Description
As shown in fig. 1, 2, 3, 4 and 5, an external potential energy recovery system of an elevator comprises a potential energy recovery device connected with an elevator dragging machine 23, an elevator lighting device, an elevator display device and an elevator ventilation device which are arranged in a car 7, wherein the potential energy recovery device comprises a mechanical electric recovery device 16 connected with the elevator dragging machine 23, the mechanical electric recovery device 16 transmits recovered electric energy to a common power supply direct current bus through an inverter 5, the recovered electric energy on the common power supply direct current bus is connected with a super capacitor 11 through a DC/DC converter 13, the super capacitor 11 is connected with a power supply switching device through a controller 10, one end of the power supply switching device is connected with a common power supply, and the other end of the power supply switching device is connected with a recovered electric quantity energy consumption device. The electric quantity recovery energy consumption device comprises an elevator action monitor arranged in the car 7, wherein the elevator action monitor is connected with a controller 10, the controller 10 is connected with an emergency EPS12 through a power supply switching device, the emergency EPS12 is connected with an emergency power supply equipment 14, and the controller 10 is connected with an elevator lighting device, an elevator display device and an elevator ventilation device through the power supply switching device.
The output end of the elevator dragging machine 23 is connected with an elevator traction driving wheel 8, a traction rope 20 is arranged on the elevator traction driving wheel 8, two ends of the traction rope 20 are respectively connected with a balancing weight 21 and a lift car 7, the input end of the mechanical electric recovery device 16 is fixedly connected with the output end of a central rotating shaft of the elevator traction driving wheel 8, and the inverter 5 is arranged on one side of the mechanical electric recovery device 16. The inverter 5 is connected with a common power supply direct current bus through a wire, and a bleeder resistor 4 is arranged between the inverter 5 and the common power supply direct current bus. The common power supply direct current bus is connected with the rectifier 2 through the frequency converter 3, and the rectifier 2 is connected with an external common power supply provided with the common power supply ammeter 1. One end of the DC/DC converter 13 is connected with an energy-saving power supply ammeter 9, and the energy-saving power supply ammeter 9 is arranged on a connecting line between a common power supply direct current bus and the DC/DC converter 13.
The DC/DC converter 13 is connected with the super capacitor 11 arranged in the external potential energy recovery box 15 through a wire, the external potential energy recovery box 15 is arranged on one side of the elevator dragging machine 23, the external potential energy recovery box 15 is provided with an opening and closing door 18, the opening and closing door 18 is provided with a display 17 and a lock cylinder 19, the super capacitor 11 is arranged at the middle lower part of the external potential energy recovery box 15, and the controller 10 is arranged in the external potential energy recovery box 15 above the corresponding super capacitor 11. The controller 10 is connected with a networking data transceiver module of an independent power supply, the networking data transceiver module is connected with a remote monitoring processor through the Internet, residual electricity consumption operation software is installed in the remote monitoring processor, the elevator action monitor is connected with the remote monitoring processor through the controller 10, and a power supply switching starting device connected with the remote monitoring processor is arranged on one side of the controller 10. The external potential energy recovery box 15 is internally provided with a direct current bus positive terminal and a direct current bus negative terminal, and the super capacitor 11 is composed of three groups of super-capacity energy storage modules.
The potential energy recovery method of the external potential energy recovery system of the elevator comprises the following steps:
1) The external alternating current common power supply is converted into direct current through the rectifier 2 and is regulated through the frequency converter 3 to drive the elevator dragging machine 23 to run, when the car 7 moves up in a light load, moves down in a full load or stops in a braking way in the elevator shaft 22, the elevator dragging machine 23 drives the elevator traction driving wheel 8 to rotate, the elevator traction driving wheel 8 further drives the mechanical electricity recovery equipment 16 to rotate, the mechanical electricity recovery equipment 16 is a bidirectional rotary power generation equipment, and alternating current electric energy is generated in the rotating process of the mechanical electricity recovery equipment 16;
2) The recovered alternating current electric energy is converted into direct current through the inverter 5 and fed back to the mechanical electric recovery equipment 16, so that the voltage of the direct current side is increased, the DC/DC converter 13 transmits the fed back direct current electric energy to the super capacitor 11 for storage, and when the super capacitor 11 is in a full state, the extra recovered electric quantity is consumed by the bleeder resistor 4;
3) The super capacitor 11 is connected with the controller 10, the controller 10 is an independent power supply, meanwhile, the controller 10 is connected with a networking data transceiver module of the independent power supply, an elevator action monitor installed in the elevator car 7 is electrically connected with the controller 10, the elevator action monitor collects the service condition of the elevator car 7 in real time and transmits collected data information to a remote monitoring processor through the networking data transceiver module, the remote monitoring processor carries out operation through residual electric quantity energy consumption operation software according to the collected data information, and whether a power supply switching starting device needs to be started or not is selected according to an operation result;
4) When the residual electric quantity in the super capacitor 11 reaches a preset value, the power supply switching starting device starts the power supply switching device, and the recovered electric energy in the super capacitor 11 is transmitted to a common power supply end to provide power for the elevator dragging machine 23;
5) When the residual electric quantity in the super capacitor 11 is lower than a preset value, the power supply switching starting device starts the power supply switching device, the recovered electric energy in the super capacitor 11 is transmitted to the emergency EPS12 end, emergency electric energy is provided for the emergency power equipment 14 when the common power supply of the emergency EPS12 is cut off, and meanwhile, electric energy required by operation is provided for the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment in the elevator car 7.
6) When the common power supply outside the elevator dragging machine 23 is powered off, the electric energy recovered in the super capacitor 11 is transmitted to the common power supply direct current bus through the DC/DC converter 13 to supply electric energy for the elevator dragging machine 23, the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment.
Example 1: as shown in fig. 1, 2, 3 and 4, an external ac common power supply is converted into a dc power by a rectifier 2, and the dc power is regulated by a frequency converter 3 to drive an elevator dragging machine 23 to run, when a car 7 moves up in a light load, moves down in a full load or stops in a braking manner in an elevator shaft 22, the elevator dragging machine 23 drives an elevator traction driving wheel 8 to rotate, the elevator traction driving wheel 8 further drives a mechanical electric recovery device 16 to rotate, the mechanical electric recovery device 16 is a bidirectional rotary power generation device, and ac power is generated in the process of rotating the mechanical electric recovery device 16. The recovered ac power is converted into DC power by the inverter 5 and fed back to the mechanical power recovery device 16, so that the DC side voltage is increased, the DC/DC converter 13 transmits the fed-back DC power to the super capacitor 11 for storage, and when the super capacitor 11 is in a full state, the extra recovered power is consumed by the bleeder resistor 4.
Example 2: as shown in fig. 1, 2, 3, 4 and 5, an external ac common power supply is converted into a dc power by a rectifier 2, and the dc power is regulated by a frequency converter 3 to drive an elevator dragging machine 23 to run, when a car 7 moves up in a light load, moves down in a full load or stops in a braking manner in an elevator hoistway 22, the elevator dragging machine 23 drives an elevator traction driving wheel 8 to rotate, the elevator traction driving wheel 8 further drives a mechanical electric recovery device 16 to rotate, the mechanical electric recovery device 16 is a bidirectional rotary power generation device, and ac power is generated in the process of rotating the mechanical electric recovery device 16. The recovered alternating current electric energy is converted into direct current through the inverter 5 and fed back to the mechanical electric recovery equipment 16, the direct current side voltage is increased, the DC/DC converter 13 transmits the fed back direct current electric energy to the super capacitor 11 for storage, the super capacitor 11 is connected with the controller 10, the controller 10 is an independent power supply, meanwhile, the controller 10 is connected with a networking data transceiver module of the independent power supply, an elevator action monitor installed in the elevator car 7 is electrically connected with the controller 10, the elevator action monitor collects the service condition of the elevator car 7 in real time and transmits collected data information to the remote monitoring processor through the networking data transceiver module, and the remote monitoring processor performs operation through residual electric quantity energy consumption operation software according to the collected data information and selects whether the power supply switching starting device needs to be started or not according to operation results. When the residual electric quantity in the super capacitor 11 reaches a preset value, the power supply switching starting device starts the power supply switching device, and the recovered electric energy in the super capacitor 11 is transmitted to a common power supply end to provide power for the elevator dragging machine 23.
Example 3: as shown in fig. 1, 2, 3, 4 and 5, an external ac common power supply is converted into a dc power by a rectifier 2, and the dc power is regulated by a frequency converter 3 to drive an elevator dragging machine 23 to run, when a car 7 moves up in a light load, moves down in a full load or stops in a braking manner in an elevator hoistway 22, the elevator dragging machine 23 drives an elevator traction driving wheel 8 to rotate, the elevator traction driving wheel 8 further drives a mechanical electric recovery device 16 to rotate, the mechanical electric recovery device 16 is a bidirectional rotary power generation device, and ac power is generated in the process of rotating the mechanical electric recovery device 16. The recovered alternating current electric energy is converted into direct current through the inverter 5 and fed back to the mechanical electric recovery equipment 16, the direct current side voltage is increased, the DC/DC converter 13 transmits the fed back direct current electric energy to the super capacitor 11 for storage, the super capacitor 11 is connected with the controller 10, the controller 10 is an independent power supply, meanwhile, the controller 10 is connected with a networking data transceiver module of the independent power supply, an elevator action monitor installed in the elevator car 7 is electrically connected with the controller 10, the elevator action monitor collects the service condition of the elevator car 7 in real time and transmits collected data information to the remote monitoring processor through the networking data transceiver module, and the remote monitoring processor performs operation through residual electric quantity energy consumption operation software according to the collected data information and selects whether the power supply switching starting device needs to be started or not according to operation results. When the residual electric quantity in the super capacitor 11 is lower than a preset value, the power supply switching starting device starts the power supply switching device, the recovered electric energy in the super capacitor 11 is transmitted to the emergency EPS12 end, emergency electric energy is provided for the emergency power equipment 14 when the common power supply of the emergency EPS12 is cut off, and meanwhile, electric energy required by operation is provided for the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment in the elevator car 7.
Example 4: as shown in fig. 1, 2, 3, 4 and 5, an external ac common power supply is converted into a dc power by a rectifier 2, and the dc power is regulated by a frequency converter 3 to drive an elevator dragging machine 23 to run, when a car 7 moves up in a light load, moves down in a full load or stops in a braking manner in an elevator hoistway 22, the elevator dragging machine 23 drives an elevator traction driving wheel 8 to rotate, the elevator traction driving wheel 8 further drives a mechanical electric recovery device 16 to rotate, the mechanical electric recovery device 16 is a bidirectional rotary power generation device, and ac power is generated in the process of rotating the mechanical electric recovery device 16. The recovered ac power is converted into DC power by the inverter 5 and fed back to the mechanical power recovery device 16, the DC side voltage is increased, and the DC/DC converter 13 transmits the fed-back DC power to the supercapacitor 11 for storage. When the common power supply outside the elevator dragging machine 23 is powered off, the electric energy recovered in the super capacitor 11 is transmitted to the common power supply direct current bus through the DC/DC converter 13 to supply electric energy for the elevator dragging machine 23, the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment.
The implementation 2 and 3 are taken as test objects, when the system operates, the balance electric energy can be obviously found, the electricity saving efficiency is verified through a test, and when the test is carried out, the elevator operation mode adopts a mode of simulating the random floor stopping up and down operation of a common residential building, wherein the floor stopping is that the elevator stands for 50 seconds, a car door is not opened, and then the elevator operates up and down again. The test shows that:
when the elevator runs empty, the common power supply ammeter 1 reads as follows: prior to experiment a:153 kilowatt-hours, post test B:160.5 kwh. The energy-saving power supply ammeter 9 reads as follows: c before the experiment: 45.49 kilowatt-hours, post test D:48.83 kilowatt-hours. The total energy consumption of the elevator is as follows: (B-ase:Sub>A) + (D-C) =10.84 kwh, the power saving efficiency is
When the elevator runs fully, the common power supply ammeter 1 reads as follows: prior to experiment a:160.7 kilowatt-hours, post test B:168.4 kilowatt-hours. The energy-saving power supply ammeter 9 reads as follows: c before the experiment: 48.87 kilowatt-hours, post test D:52.11 kilowatt-hours. The total energy consumption of the elevator is as follows: (B-ase:Sub>A) + (D-C) =10.94 kwh, the power saving efficiency is
As shown in fig. 6, the comparison of the power consumption data for the 8-day ladder operation performed in the laboratory, as shown in fig. 6, the power saving rate on day 1 was 34.6%, the power saving rate on day 2 was 30.77%, the power saving rate on day 3 was 31.82%, the power saving rate on day 4 was 30.95%, the power saving rate on day 5 was 30.56%, the power saving rate on day 6 was 31.82%, the power saving rate on day 7 was 34.69%, the power saving rate on day 8 was 33.33%, and the overall power saving rate on day 8 was 32.24%.
According to the test data, the electricity saving rate is taken as an example, the conventional electricity consumption is set to be 50 kilowatt hours, the electricity price is calculated according to 1 yuan, the annual working days are 300 days, and the annual comprehensive electricity saving rate is 4500 yuan. The conventional power consumption is set to 80 kilowatt hours, the electricity price is calculated according to 1 yuan, the annual working days are 300 days, and the annual comprehensive electricity fee is saved by 7200 yuan. The conventional power consumption is set to be 100 kilowatt hours, the electricity price is calculated according to 1 yuan, the annual working days are 300 days, and the annual comprehensive electricity charge is saved by 9000 yuan.
As shown in fig. 7, the middle horizontal line is a fixed input line, the bottom-most inclined line is a 50-degree time varying line per day, the middle inclined line is an 80-degree time varying line per day, and the top-most inclined line is a 100-degree time varying line per day. As shown in the figure, the elevator with the power consumption of 50 kWh/day realizes the newly added investment and the gain balance for 4-5 years; the elevator with the power consumption of 80 kWh/day realizes the newly added investment and the gain balance in 2-3 years; the elevator with the power consumption of more than 120 kWh/day realizes the newly added investment and the gain balance in 1-2 years. If each elevator saves energy by 9000 degrees (30 multiplied by 300) per year, the energy saving and emission reduction index of each elevator is as follows: saving standard coal in the folded year: 3.7 tons, annual emission reduction CO2:9 tons, annual emission reduction S02:0.27 ton, annual emission reduction nitrogen oxides: 0.09 ton, corresponding to afforestation: forest of 50 mu.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An external potential energy recovery system of elevator, includes with elevator drags draw machine (23) and installs elevator lighting apparatus, elevator display device and the potential energy recovery unit that elevator ventilation equipment is connected in car (7), its characterized in that: the potential energy recovery device comprises mechanical electricity recovery equipment (16) connected with an elevator dragging machine (23), the mechanical electricity recovery equipment (16) conveys recovered electric energy to a common power supply direct current bus through an inverter (5), the recovered electric energy on the common power supply direct current bus is connected with a super capacitor (11) through a DC/DC converter (13), the super capacitor (11) is connected with a power supply switching device through a controller (10), one end of the power supply switching device is connected with a common power supply, and the other end of the power supply switching device is connected with a recovered electric quantity energy consumption device.
2. The external potential energy recovery system of an elevator of claim 1, wherein: the electric quantity recovery energy consumption device comprises an elevator action monitor arranged in a lift car (7), wherein the elevator action monitor is connected with a controller (10), the controller (10) is connected with an emergency EPS (12) through a power supply switching device, the emergency EPS (12) is connected with emergency standby electric equipment (14), and the controller (10) is connected with elevator lighting equipment, elevator display equipment and elevator ventilation equipment through the power supply switching device.
3. The external potential energy recovery system of an elevator of claim 1, wherein: the output end of the elevator dragging machine (23) is connected with an elevator traction driving wheel (8), a traction rope (20) is arranged on the elevator traction driving wheel (8), two ends of the traction rope (20) are respectively connected with a balancing weight (21) and a lift car (7), the input end of the mechanical electric recovery device (16) is fixedly connected with the output end of a central rotating shaft of the elevator traction driving wheel (8), and an inverter (5) is arranged on one side of the mechanical electric recovery device (16).
4. The external potential energy recovery system of an elevator according to claim 1 or 3, wherein: the inverter (5) is connected with a common power supply direct current bus through a wire, and a bleeder resistor (4) is arranged between the inverter (5) and the common power supply direct current bus.
5. The external potential energy recovery system of an elevator of claim 1, wherein: the common power supply direct current bus is connected with the rectifier (2) through the frequency converter (3), and the rectifier (2) is connected with an external common power supply provided with the common power supply ammeter (1).
6. The external potential energy recovery system of an elevator of claim 1, wherein: one end of the DC/DC converter (13) is connected with an energy-saving power supply ammeter (9), and the energy-saving power supply ammeter (9) is arranged on a connecting line between a common power supply direct current bus and the DC/DC converter (13).
7. The external potential energy recovery system of an elevator according to claim 1 or 6, characterized in that: the DC/DC converter (13) is connected with the super capacitor (11) installed in the external potential energy recovery box (15) through a wire, the external potential energy recovery box (15) is arranged on one side of the elevator dragging machine (23), the opening and closing door (18) is installed on the external potential energy recovery box (15), the display (17) and the lock core (19) are installed on the opening and closing door (18), the super capacitor (11) is arranged at the middle lower part of the external potential energy recovery box (15), and the controller (10) is installed in the external potential energy recovery box (15) above the external potential energy recovery box (11).
8. The external potential energy recovery system of an elevator according to claim 1 or 2, characterized in that: the elevator motion monitor is connected with the remote monitoring processor through the controller (10), and a power supply switching starting device connected with the remote monitoring processor is arranged on one side of the controller (10).
9. The external potential energy recovery system of an elevator of claim 7, wherein: the external potential energy recovery box (15) is internally provided with a direct current bus positive terminal and a direct current bus negative terminal, and the super capacitor (11) is composed of three groups of super-capacity energy storage modules.
10. A potential energy recovery method of an external potential energy recovery system of an elevator according to any one of claims 1 to 9, characterized in that the method comprises the steps of:
1) an external alternating current common power supply is converted into direct current through a rectifier (2), and is regulated through a frequency converter (3) to drive an elevator dragging machine (23) to run, when a car (7) is in light load ascending, full load descending or braking stopping in an elevator shaft (22), the elevator dragging machine (23) drives an elevator traction driving wheel (8) to rotate, the elevator traction driving wheel (8) further drives a mechanical electric recovery device (16) to rotate, the mechanical electric recovery device (16) is bidirectional rotary power generation equipment, and alternating current electric energy is generated in the rotating process of the mechanical electric recovery device (16);
2) The recovered alternating current electric energy is converted into direct current through an inverter (5) and fed back to mechanical electric recovery equipment (16), so that the voltage of the direct current side is increased, the DC/DC converter (13) transmits the fed back direct current electric energy to the super capacitor (11) for storage, and when the super capacitor (11) is in a full state, the extra recovered electric quantity is consumed by the bleeder resistor (4);
3) The super capacitor (11) is connected with the controller (10), the controller (10) is an independent power supply, the controller (10) is connected with a networking data transceiver module of the independent power supply, an elevator action monitor installed in the elevator car (7) is electrically connected with the controller (10), the elevator action monitor collects the service condition of the elevator car (7) in real time and transmits collected data information to a remote monitoring processor through the networking data transceiver module, and the remote monitoring processor performs operation through residual electric quantity energy consumption operation software according to the collected data information and selects whether a power supply switching starting device needs to be started or not according to an operation result;
4) When the residual electric quantity in the super capacitor (11) reaches a preset value, the power supply switching starting device starts the power supply switching device, and the recovered electric energy in the super capacitor (11) is transmitted to a common power supply end to provide power for the elevator dragging machine (23);
5) When the residual electric quantity in the super capacitor (11) is lower than a preset value, the power supply switching starting device starts the power supply switching device, the recovered electric energy in the super capacitor (11) is transmitted to the emergency EPS (12) end, emergency electric energy is provided for the emergency power equipment (14) when the common power supply of the emergency EPS (12) is powered off, and meanwhile, electric energy required by operation is provided for the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment in the elevator car (7).
6) When the common power supply outside the elevator dragging machine (23) is powered off, the electric energy recovered in the super capacitor (11) is transmitted to the common power supply direct current bus through the DC/DC converter (13) to provide electric energy for the elevator dragging machine (23), the elevator lighting equipment, the elevator display equipment and the elevator ventilation equipment.
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