CN114044418B - Method for optimizing power of elevator emergency power supply - Google Patents
Method for optimizing power of elevator emergency power supply Download PDFInfo
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- CN114044418B CN114044418B CN202111273386.XA CN202111273386A CN114044418B CN 114044418 B CN114044418 B CN 114044418B CN 202111273386 A CN202111273386 A CN 202111273386A CN 114044418 B CN114044418 B CN 114044418B
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- Prior art keywords
- elevator
- power supply
- power
- control system
- emergency power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
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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
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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
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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
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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
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Elevator Control (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a control method for minimizing power requirements of an elevator emergency power supply, which is characterized in that when the emergency power supply works, an elevator control system controls the running speed of an elevator motor according to actual working conditions and is matched with a proper optimized control method, so that the power of the emergency power supply required by the elevator control system is minimized under the condition of meeting the use requirements.
Description
Technical Field
The invention relates to an elevator control technology, in particular to a method for optimizing power of an elevator emergency power supply.
Background
With the development of society, elevators have become necessary vertical vehicles for people to travel daily. The elevator has high requirements on power supply, and once power failure occurs, people can be trapped, so that the use satisfaction degree of customers is reduced. For this reason, in the field where the elevator power supply is unstable or frequently fails, an emergency power supply is generally configured by a homeowner or an elevator company in order to reduce the influence of the elevator power failure. There are two general types of such arrangements, one is that the building itself has a standby power supply which, when powered, allows one or more elevators therein to operate; the other is that the elevator is provided with an emergency power supply, and the band-type brake of the elevator host is opened through the emergency power supply, so that the elevator can run to the door zone position, and passengers are released.
When the elevator is selected to be provided with an emergency power supply, the elevator is operated in a light load direction (the elevator motor generates power) according to a preset speed, so that the requirement on the emergency power supply power is reduced. But the emergency power supply power in the current market still cannot be effectively reduced for the following reasons: the power consumption of the control system and the power consumption of the elevator motor are not considered; the power consumed is related to the current, i.e. to the current car load of the elevator running; even in power generating operation, the power loss of the elevator motor itself is related to the car load.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for optimizing the power of an elevator emergency power supply aiming at the defects in the prior art, so as to reduce the requirement on the emergency power supply.
In order to achieve the above purpose, the elevator emergency power supply power optimization method provided by the invention has the advantages that when the emergency power supply works, the elevator control system controls the running speed of the elevator motor according to the actual working condition, and the elevator control system is matched with a proper optimization control method, so that the emergency power supply power required by the elevator control system is minimized under the condition of meeting the use requirement.
In a preferred embodiment of the invention, the elevator control system controls the running speed of the elevator motor according to the actual working condition, specifically means that when the emergency power supply works, if the elevator car is not at the door zone position, the elevator car needs to run in a flat layer; at this time, the elevator control system monitors the output power of the emergency power supply, and by controlling the running speed and direction of the elevator car, the power of the emergency power supply required by the elevator control system is minimized under the condition of meeting the use requirement.
In a preferred embodiment of the invention, the elevator control system monitors the output power of the emergency power supply, and by controlling the running speed and direction of the elevator car, the elevator control system minimizes the required power of the emergency power supply under the condition of meeting the use requirement as follows:
firstly, an elevator control system selects a running direction according to the load or running torque of a car, so that an elevator motor runs in a power generation state as much as possible;
secondly, when the elevator motor runs electrically, the elevator control system controls the speed of the elevator car, so that the elevator car runs at a lower speed, and the input power of the elevator control system is smaller than the rated power of the emergency power supply; when the elevator motor performs a generating operation, the elevator control system controls the speed of the elevator car to minimize the input power required by the elevator control system.
In a preferred embodiment of the invention, the elevator control system input power is obtained by direct measurement or estimation or by a combination of direct measurement and estimation.
In a preferred embodiment of the invention, the estimation is based on the power of the components of the elevator control system during normal operation and the real-time power of the elevator motor operation.
In a preferred embodiment of the invention, the power obtained by the normal operation of the components of the elevator control system is obtained by pre-testing and stored in the memory unit of the elevator control system.
In a preferred embodiment of the invention the power of the components of the elevator control system during normal operation and the real-time power of the elevator motor operation are obtained by modeling calculations.
In a preferred embodiment of the present invention, the determination method of the electric operation of the elevator motor and the electric power generation operation of the elevator motor is as follows: when the elevator starts to operate, the power input by the elevator motor is positive, and the input power of the elevator motor changes along with the speed of the elevator car; when the speed of the elevator car is increased, if the input power of the elevator motor is increased, the elevator motor is indicated to be in electric operation; when the speed of the elevator car is increased, if the input power of the elevator motor is unchanged, becomes smaller or even becomes negative, the elevator motor is indicated to be in power generation operation.
In a preferred embodiment of the invention the operating speed of the elevator car should be limited to a certain range when controlling the operating speed of the elevator car, avoiding that the speed is too low resulting in inefficiency or that the speed is too high possibly causing a risk.
In a preferred embodiment of the present invention, the matching with a proper optimization control method includes one or a combination of any two or more of optimized driving control, reasonable control of auxiliary power supply power consumption, proper relaxation of detection margin of related faults of driving, restart permission when operation is not smooth, and restart permission when operation is not smooth.
In a preferred embodiment of the invention, the optimized drive control is in particular to select an appropriate PWM modulation scheme in dependence on the input power of the elevator motor.
In a preferred embodiment of the present invention, the reasonable control of the auxiliary power means one or a combination of two or more of stopping the display of the outbound panel, stopping the display of the inbound panel, reducing the display brightness of the outbound panel, reducing the display brightness of the inbound panel, stopping or reducing the fan rotation speed of the elevator car, and controlling the fan rotation speed of the cabinet.
In a preferred embodiment of the present invention, the properly relaxed drive-related fault detection margin refers to a properly relaxed voltage fault detection margin or a speed deviation fault detection margin.
In a preferred embodiment of the invention, the permission to restart when the operation is not smooth means that the emergency power supply or the elevator control system can restart when the output power of the emergency power supply is too large or the elevator control system is abnormal to control the elevator.
In a preferred embodiment of the invention, when the operation is not smooth, the restarting operation is allowed to be performed in the opposite direction, namely, if the elevator control system judges that the previous operation is electric operation, the elevator motor is controlled to perform the opposite direction operation when the operation is restarted.
In a preferred embodiment of the invention, the elevator control system in the case of meeting the use requirements is to meet the quality requirements of the elevator operation by the user in the case of emergency power supply, which requirements include but are not limited to operation speed, comfort.
The working principle of the elevator emergency power supply power optimization method of the invention is as follows:
the elevator control system monitors the flow of electric energy when the emergency power supply works, controls the running speed of the elevator motor according to the actual working condition, and matches with other optimized controls, so that the required emergency power supply power is minimum under the condition that the whole elevator system meets the use requirement. Since the load of the elevator car and the speed of the elevator motor determine the power at which the elevator motor operates, this power is negative when generating electricity; when running electrically, this power is positive. The main invention point of the invention is to control the power of the elevator motor by controlling the running speed of the elevator, thereby achieving the purpose of minimum power of the required emergency power supply. The specific contents are as follows: when the emergency power supply works, if the elevator car is not at the door zone position, flat floor running is required. At this time, the elevator control system monitors the output power of the emergency power supply and takes this value as the control target at minimum. By controlling the running speed and direction of the elevator, the power of the required emergency power supply is minimized under the condition that the whole elevator system meets the use requirement. First, the elevator control system selects a traveling direction according to a car load or traveling torque, and causes the elevator motor to travel in a power generation state as much as possible. The elevator motor is suspended with the car and the counterweight at both ends respectively, and when the mass of the car and the load thereof is relatively close to the mass of the counterweight, there may be a case that the elevator motor is in an electric running state in both directions due to the existence of friction. Power needs to be absorbed from the emergency power supply, but the required power is not large due to the small mass deviation. When the load deviation at two sides exceeds the influence of friction force, the elevator control system can select to run in the light load direction, and the elevator motor is in a power generation state. Secondly, when the elevator motor is operated electrically, it is necessary to absorb power from the power supply, and theoretically, the lower the speed at which the elevator motor is operated, the lower the power required. At the moment, the elevator control system controls the speed of the elevator, so that the elevator runs at a lower speed, and the input power of the elevator control system is smaller than the rated power of the emergency power supply; when the elevator motor performs a generating operation, a part of power needs to be consumed due to the control system itself, the elevator motor windings, and the like. When the speed of the elevator car runs slowly, the power generated by the elevator motor is insufficient to satisfy the self consumption, so that the power is required to be absorbed from the emergency power supply, the power generated by the elevator motor is increased along with the increase of the running speed of the elevator car, and the power absorbed from the emergency power supply is reduced. The control system minimizes the input power required by the control system, i.e., the emergency power supply, by controlling the speed at which the car is traveling. The invention also comprises a matched optimal control method, which comprises the steps of optimizing the control of variable frequency drive, selecting a proper PWM modulation mode according to the input power of the elevator motor, and minimizing the power loss of the frequency converter; reasonably controlling the power consumption of an auxiliary power supply, such as stopping the display of an outbound or inbound call panel or reducing the display brightness thereof, stopping or reducing the rotation of fans of an elevator car and a control cabinet, and the like; under the emergency power supply operation mode, the detection margin of related faults of driving is properly widened, so that the control system is insensitive to speed deviation and the like, and the operation of the emergency power supply is completed under the condition of not affecting safety; when the output power of the power supply is too large or the elevator control system controls the elevator to run abnormally, the emergency power supply or the elevator control system can start running again; if the elevator control system judges that the previous operation is the electric operation, the elevator control system controls the elevator motor to run in the opposite direction when the elevator control system starts the operation again, and a plurality of attempts can be made.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the following brief description of the drawings is given for the purpose of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without the need for inventive work for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention; in the figure: 1 is an emergency power supply, 2 is an elevator control system, 3 is an elevator motor, and 4 is an elevator car.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the power of the elevator motor 3 is controlled by controlling the running speed of the elevator car 4, so that the purpose of minimizing the power of the required emergency power supply 1 is achieved. The specific contents are as follows: when the emergency power supply 1 is in operation, if the elevator car 4 is not in the door zone position, the elevator car needs to run on a flat floor. At this time, the elevator control system 2 monitors the output power of the emergency power supply 1, and takes this value as a control target at minimum. By controlling the running speed and direction of the elevator, the power of the emergency power supply 1 required by the whole elevator system is minimized under the condition of meeting the use requirement. First, the elevator control system 2 selects a traveling direction according to a car load or traveling torque, and causes the elevator motor 3 to travel in a power generation state as much as possible. The elevator motor 3 has both ends respectively hung car and counterweight, and when the quality of car and its load is relatively close to the counterweight quality, there may be a case that the elevator motor 3 is in an electric running state in both directions due to the existence of friction. It is necessary to absorb power from the emergency power supply 1, but the required power is not large because the mass deviation is not large. When the load deviation of both sides exceeds the influence of friction, the elevator control system 2 selects to run in the light load direction, and the elevator motor 3 is in the power generation state. Secondly, when the elevator motor 3 is operated electrically, it is necessary to absorb power from the power supply, and theoretically, the lower the speed at which the elevator motor 3 is operated, the lower the power required in satisfying the use requirement. At this time, the elevator control system 2 controls the speed of the elevator to enable the elevator to run at a lower speed, so that the input power of the elevator control system 2 is smaller than the rated power of the emergency power supply 1; when the elevator motor 3 performs a generating operation, a part of power needs to be consumed due to the control system itself, windings of the elevator motor 3, and the like. When the car speed is slow, the electricity generated by the elevator motor 3 is insufficient to satisfy the self consumption, so that the power needs to be absorbed from the emergency power supply 1, the electricity generated by the elevator motor 3 is increased along with the increase of the car running speed, and the power absorbed from the emergency power supply 1 is reduced. The control system minimizes the input power required by the control system, i.e. the power of the emergency power supply 1, by controlling the speed at which the car is running. The invention also comprises a matched optimal control method, which comprises the steps of optimizing the control of variable frequency drive, selecting a proper PWM modulation mode according to the input power of the elevator motor 3, and minimizing the power loss of the frequency converter; reasonably controlling the power consumption of an auxiliary power supply, such as stopping the display of an outbound or inbound call panel or reducing the display brightness thereof, stopping or reducing the rotation of fans of an elevator car and a control cabinet, and the like; under the operation mode of the emergency power supply 1, the detection margin of related faults of driving is properly widened, so that a control system is insensitive to speed deviation and the like, and the operation of the emergency power supply 1 is completed under the condition that the safety is not influenced; when the power output power is too large or the elevator control system 2 controls the elevator to run abnormally, the emergency power supply 1 or the elevator control system 2 can start running again; when the elevator control system 2 determines that the previous operation is the electric operation, it controls the elevator motor 3 to operate in the reverse direction when the operation is restarted, and thus a plurality of attempts can be made.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (13)
1. The power optimization method for the elevator emergency power supply is characterized by comprising the following steps of: when the emergency power supply works, the elevator control system controls the running speed of the elevator motor according to the actual working condition, and the elevator control system is matched with a proper optimization control method, so that the emergency power supply power required by the elevator control system is minimized under the condition of meeting the use requirement;
the elevator control system controls the running speed of the elevator motor according to the actual working condition, specifically, when the emergency power supply works, if the elevator car is not at the door zone position, the elevator car needs to run in a flat layer; at this time, the elevator control system monitors the output power of the emergency power supply, and the running speed and the running direction of the elevator car are controlled, so that the power of the emergency power supply required by the elevator control system is minimum under the condition of meeting the use requirement;
the elevator control system monitors the output power of the emergency power supply, and controls the running speed and direction of the elevator car to ensure that the elevator control system has the following specific steps of minimizing the power of the emergency power supply under the condition of meeting the use requirement:
firstly, an elevator control system selects a running direction according to the load or running torque of a car, so that an elevator motor runs in a power generation state as much as possible;
secondly, when the elevator motor runs electrically, the elevator control system controls the speed of the elevator car, so that the elevator car runs at a lower speed, and the input power of the elevator control system is smaller than the rated power of the emergency power supply; when the elevator motor performs power generation operation, the elevator control system controls the speed of the elevator car, so that the input power required by the elevator control system is minimum;
the judging method for the electric operation of the elevator motor and the power generation operation of the elevator motor comprises the following steps: when the elevator starts to operate, the power input by the elevator motor is positive, and the input power of the elevator motor changes along with the speed of the elevator car; when the speed of the elevator car is increased, if the input power of the elevator motor is increased, the elevator motor is indicated to be in electric operation; when the speed of the elevator car is increased, if the input power of the elevator motor is unchanged, becomes smaller or even becomes negative, the elevator motor is indicated to be in power generation operation.
2. A method of power optimization of an elevator emergency power supply as defined in claim 1, wherein: the input power of the elevator control system is obtained by adopting a direct measurement mode or an estimation mode or a direct measurement and estimation combination mode.
3. A method of power optimization of an elevator emergency power supply as defined in claim 2, wherein: the estimation mode is to estimate according to the power of each component of the elevator control system when the component works normally and the real-time power of the elevator motor.
4. A method of power optimization of an elevator emergency power supply as defined in claim 2, wherein: the power obtaining mode of each component of the elevator control system during normal operation is obtained through pre-testing and is stored in a storage unit of the elevator control system.
5. A method of power optimization of an elevator emergency power supply as defined in claim 2, wherein: the power of each component of the elevator control system during normal operation and the real-time power of the elevator motor operation are obtained through modeling calculation.
6. A method of power optimization of an elevator emergency power supply as defined in claim 1, wherein: the running speed of the elevator car should be limited to a certain range when controlling the running speed of the elevator car, avoiding that the speed is too low to cause inefficiency or that the speed is too high to cause risks.
7. A method of power optimization of an elevator emergency power supply as defined in claim 1, wherein: the method comprises the steps of optimizing driving control, reasonably controlling auxiliary power supply power consumption, properly relaxing detection margin of related driving faults, allowing restarting when operation is not smooth, and allowing restarting to operate in the opposite direction when operation is not smooth.
8. The method for optimizing power of an elevator emergency power supply of claim 7, wherein: the optimized driving control is specifically to select a proper PWM modulation mode according to the input power of the elevator motor.
9. The method for optimizing power of an elevator emergency power supply of claim 7, wherein: the reasonable control auxiliary power supply electricity utilization means one or more than two of stopping the display of the outbound panel, stopping the display of the inbound panel, reducing the display brightness of the outbound panel, reducing the display brightness of the inbound panel, stopping or reducing the fan rotation speed of the elevator car and the fan rotation speed of the control cabinet.
10. The method for optimizing power of an elevator emergency power supply of claim 7, wherein: the detection margin of the proper relaxation drive related faults refers to the detection margin of the proper relaxation voltage faults or the detection margin of the speed deviation faults.
11. The method for optimizing power of an elevator emergency power supply of claim 7, wherein: the permission to restart when the operation is unsmooth refers to restarting the operation of the emergency power supply or the elevator control system when the output power of the emergency power supply is too large or the elevator control system controls the elevator to operate abnormally.
12. The method for optimizing power of an elevator emergency power supply of claim 7, wherein: when the operation is unsmooth, the restarting is allowed to run in the opposite direction, namely, if the elevator control system judges that the previous operation is the electric operation, the elevator motor is controlled to run in the opposite direction when the operation is restarted.
13. A method of power optimization of an elevator emergency power supply as defined in claim 1, wherein: the elevator control system meets the quality requirements of elevator operation by users in the case of emergency power, including but not limited to operation speed and comfort.
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| CN202111273386.XA CN114044418B (en) | 2021-10-29 | 2021-10-29 | Method for optimizing power of elevator emergency power supply |
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| CN202111273386.XA CN114044418B (en) | 2021-10-29 | 2021-10-29 | Method for optimizing power of elevator emergency power supply |
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| CN114044418A CN114044418A (en) | 2022-02-15 |
| CN114044418B true CN114044418B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7549515B2 (en) * | 2003-10-07 | 2009-06-23 | Otis Elevator Company | Electrical elevator rescue system |
| FI117282B (en) * | 2005-05-12 | 2006-08-31 | Kone Corp | Elevator group controlling method for elevator system, involves giving start permission to elevator allocated to call before departure of elevator if taking elevator into use will not result in exceeding set maximum power limit |
| FI119764B (en) * | 2007-11-14 | 2009-03-13 | Kone Corp | Adaptation of the parameters of a transport system |
| CN110697521B (en) * | 2019-10-17 | 2022-04-19 | 深圳市海浦蒙特科技有限公司 | Elevator emergency operation control method and device |
| EP3901079A1 (en) * | 2020-04-23 | 2021-10-27 | KONE Corporation | A method for testing safety characteristics of an elevator |
| CN113401761B (en) * | 2021-06-03 | 2023-03-24 | 日立楼宇技术（广州）有限公司 | Elevator power failure emergency control method and device |
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