WO2013080300A1

WO2013080300A1 - Elevator group management control device

Info

Publication number: WO2013080300A1
Application number: PCT/JP2011/077544
Authority: WO
Inventors: 江藤　正治
Original assignee: 三菱電機株式会社
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2013-06-06
Also published as: JPWO2013080300A1; JP5812106B2; CN103946140A; CN103946140B

Abstract

Provided is an elevator group management control device able to efficiently consume regenerated power from the elevator during powered operation. For this reason, an elevator group management control device for controlling a plurality of elevator cars by managing the same as one group, wherein the control device is provided with a prediction unit (10c) for predicting for a certain elevator car, on the basis of the movement direction and load of the elevator car, whether operation until the next stopping floor will be regenerative operation or powered operation and the time for regenerative (powered) operation, and a command setting unit (10d) for calculating the overlap time between the regenerative (powered) operation of the elevator car and the regenerative powered (poweredregenerative) operation of another elevator car, obtaining a running speed from a longer overlap time by calculating overlap time while the elevator car changes running speed, and setting a command value for the running speed of the elevator car, when the other different elevator car is predicted to realize powered (regenerative) operation during the time predicted for regenerative (powered) operation of the first elevator car.

Description

Elevator group management control device

This invention relates to an elevator group management control device.

Generally, in an elevator system, an elevator car and a counterweight are connected by a main rope, and the weight of the counterweight is set so as to balance the car when half of the capacity is on board. For this reason, when the empty car with no passengers rises, the hoisting machine is rotated by the potential energy of the lowering counterweight, and the hoisting machine can regenerate electric power by acting as a generator. On the other hand, when the empty car descends, the hoisting machine operates in a power running to increase the counterweight and consumes power.

In a conventional elevator group management control device, the unbalanced load of both is detected from the weight of the counterweight and the load on the car, and the hoisting call is generated based on the detected unbalanced load. There has been known one that attempts to suppress power consumption by preferentially assigning elevators in a direction in which the load on the aircraft is lightened (see, for example, Patent Document 1).

Also, in order to reduce the burden on the power distribution equipment that supplies power to the building electrical equipment including the elevator, when the load on the power distribution equipment is reduced, the elevator speed is reduced when the elevator is in regenerative operation. The thing which restrict | limits the regenerative electric energy of an elevator is also known conventionally (for example, refer patent document 2).

Furthermore, a predicted value of power consumption in each elevator is calculated from information such as hall call, car call and number of passengers, so that the total of power consumption in all elevators does not exceed the preset power suppression value. A device that controls the operation is also known in the art (see, for example, Patent Document 3).

Japanese Unexamined Patent Publication No. 09-227033 Japanese Unexamined Patent Publication No. 2010-215365 Japanese Unexamined Patent Publication No. 2011-057395

However, the conventional elevator group management control device disclosed in Patent Document 1 assigns the generated hall call to an elevator that consumes as little power as possible, but uses the power regenerated along with the operation of the elevator. Since this is not taken into consideration, there is a problem that the regenerative power cannot be used effectively.

The conventional elevator group management control device disclosed in Patent Document 2 controls the operation of the elevator so as to suppress the regenerative power of the elevator according to the load of the power distribution facility of the building. There is no consideration for effective use of electric power. Therefore, there is a problem similar to that described in Patent Document 1 described above. The point that the regenerative power is not effectively utilized is the same in the conventional elevator disclosed in Patent Document 3.

The present invention has been made to solve such a problem, and can efficiently consume regenerative power of an elevator by powering operation, and can further reduce energy consumption. A group management control device is obtained.

The elevator group management control device according to the present invention is an elevator group management control device that manages and controls a plurality of elevator cars as a group, and for a certain car, the moving direction and load of the car Based on the above, it is predicted whether the operation from the current stop floor to the next stop floor is a regenerative operation that regenerates power or a power running operation that consumes power, and the time for the regenerative operation or power running operation is predicted And the predicting unit predicts that another car that is different from the car is in a power running operation or a regenerative operation in the time of the regenerative operation or power running of the car predicted by the prediction unit. The regenerative operation or power running operation of the car and the power running operation or regenerative operation of the other car are duplicated and performed simultaneously. A command for calculating the overlap time, calculating the overlap time while changing the travel speed of the car, obtaining a travel speed at which a longer overlap time is obtained, and setting a command value for the travel speed of the car And a setting unit.

In the elevator group management control device according to the present invention, the regenerative electric power of the elevator can be efficiently consumed by powering operation, and it is possible to further reduce the consumption energy.

It is a figure which shows typically the whole structure of the elevator system provided with the group management control apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the group management control apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the group management control apparatus of the elevator which concerns on Embodiment 1 of this invention.

The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
FIGS. 1 to 3 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram schematically showing the overall configuration of an elevator system including a group management control device, and FIG. 2 is an elevator group management control device. FIG. 3 is a flowchart showing the operation of the elevator group management control device.

Referring to FIG. 1, reference numeral 1 denotes a plurality of elevator cars that carry users, luggage, and the like and move up and down the hoistway. One end of the main rope 2 is connected to the upper end of each of these cars 1, and the other end of the main rope 2 is connected to the upper end of the counterweight 4. And the intermediate part of the main rope 2 is wound around the drive sheave of the hoisting machine 3 installed in the top part of the hoistway.

In this way, the car 1 and the counterweight 4 are suspended by the main rope 2 in a slidable manner that can be raised and lowered in opposite directions in the hoistway. Here, the weight of the counterweight 4 is set so as to be balanced with the car 1 in which half of the capacity is on board.

Electric power necessary for elevator operation is supplied from a commercial power source 7. The AC voltage supplied from the commercial power supply 7 is converted into a DC voltage by the converter 6. Inverters 5 are provided corresponding to the hoisting machines 3 that drive the raising and lowering of each car 1. These inverters 5 convert the DC voltage from the converter 6 into a variable voltage / variable frequency AC voltage and supply it to the hoisting machine 3. The hoisting machine 3 is driven by the AC voltage supplied from the inverter 5. Note that the inverters 5 of the respective cars 1 are connected to each other so that the regenerative power in one hoisting machine 3 can be used interchangeably with other hoisting machines 3.

The operation of a plurality of elevators (the car 1) is managed and controlled as a group (bank) by the elevator group management control device 10. The operation of each elevator (the car 1) is controlled by the elevator control device 9 provided for each elevator under the group management control by the elevator group management control device 10. The elevator control device 9 adjusts the voltage and frequency of the AC voltage supplied from the inverter 5 to the hoisting machine 3, thereby changing the rotational torque and the rotational speed of the hoisting machine 3, thereby driving the car 1. The speed is controlled.

A hall button 8 is installed at each stop floor of the elevator. The hall button 8 is used for registering a hall call in a desired direction when operated by an elevator user. Each hall button 8 is connected to the elevator control device 9, and operation information for each hall button 8 is transmitted to the elevator group management control device 10 via the elevator control device 9.

FIG. 2 shows the configuration of the elevator group management control device 10. The elevator group management control device 10 includes a hall call registration unit 10a, a hall call assignment unit 10b, a power prediction unit 10c, and a speed setting unit 10d.

The operation information for the hall button 8 is input to the hall call registration unit 10a provided in the elevator group management control device 10 (via the elevator control device 9). The hall call registration unit 10a registers a hall call to the floor where the operated hall button 8 is installed based on the input operation information. At this time, if the operated hall button 8 is an upward button, an upward hall call is registered, and if it is a downward button, a downward hall call is registered.

When a hall call is registered by the hall call registration unit 10a, the hall call assignment unit 10b assigns a specific car 1 that responds to the registered hall call. This assignment is performed so as to optimize the transportation efficiency of the elevator based on the evaluation value calculated based on the current position of each car 1, the status of call registration, and the like.

The elevator control device 9 causes the car 1 to travel so that the car 1 assigned to the hall call registration responds according to the assignment of the car 1 to the hall call registration by the hall call assignment unit 10b.

The power predicting unit 10c predicts the amount of regenerative power and the amount of power consumed in the hoisting machine 3 of each elevator based on predetermined elements related to the state of the elevator. The predetermined elements relating to the state of the elevator used for the prediction of the regenerative power amount and the power consumption amount in the power prediction unit 10c include the allocation status of the car 1 to the hall call registration by the hall call allocation unit 10b, the car 1 current position and the riding load of the car 1 are included.

More specifically, when the car 1 stops at a certain floor in response to the call, the power prediction unit 10c starts the next floor where the call is registered after the car 1 leaves the floor. It is predicted whether the operation of the car 1 until it reaches the floor is either a regenerative operation that regenerates electric power or a power running operation that consumes electric power in the hoisting machine 3.

The prediction of whether the operation of the car 1 will be a regenerative operation or a power running operation is based on the allocation status of the car 1 to the landing call registration and the moving direction of the car 1 obtained from the current position of the car 1. This can be performed using the riding load of the car 1. Further, the amount of regenerative power or power consumption in this regenerative operation or power running operation is also predicted. Furthermore, the power predicting unit 10c also predicts the time during which the previously predicted regenerative operation or power running operation of the car 1 is performed from the current stop floor to the next stop floor.

Based on the prediction result by the power prediction unit 10c, the speed setting unit 10d is configured so that the overlap time in which the regenerative operation in one car 1 and the power running operation in another car 1 are performed simultaneously is as long as possible. Set the running speed command value. More specifically, the overlap time is calculated while changing the travel speed of one of the cars 1, the travel speed longer than the overlap time is obtained, and the travel speed command value of the car 1 is set. By setting in this way, the difference between the amount of regenerative power and the amount of power consumption in the group of elevators as viewed from the group of elevators can be reduced as much as possible, and the regenerative power can be effectively utilized in powering operation.

The speed command value of the car 1 set in this way is sent from the speed setting unit 10d to the elevator control device 9. The elevator control device 9 controls the speed at which the car 1 travels according to the assignment of the car 1 to the hall call registration by the hall call assignment unit 10b according to the speed command value.

The flow chart of FIG. 3 shows the operation of the elevator group management control apparatus in this embodiment.
First, in step S1, it is confirmed whether or not a certain car 1 is just before departing from the stop floor. If it can be confirmed in step S1 that a certain car 1 is just before starting from the stop floor, the process proceeds to the next step S2.

In step S2, the power prediction unit 10c determines whether the operation up to the next stop floor is the regenerative operation or the power running operation for the car 1 that has been confirmed to be immediately before departure in step S1. Is estimated from the moving direction of the car 1 and the boarding load. If the operation up to the next stop floor is a regenerative operation, the regenerative power amount is predicted, and if the operation is a power running operation, the power consumption amount is predicted.

In the subsequent step S3, the speed setting unit 10d refers to the information on the regenerative electric energy and electric power consumption of the other car 1 that has already been predicted in the same manner, and the car 1 predicted in the previous step S2. Other car 1 that is currently traveling (hereinafter referred to as “own car”), which is the amount of consumed power or amount of regenerative power that can compensate (cancel) each other It is determined whether or not “other car” is present.

In this step S3, if it is determined that there is another car that is currently running that is the consumed (or regenerated) electric energy that can be mutually compensated for the regenerated (or consumed) electric energy of the own car, Proceed to S4. In step S4, the speed setting unit 10d determines whether the regenerative (or consumption) power amount of the own car is larger than the consumption (or regenerative) power amount of the other car. If the regenerative (or regenerative) power amount of the own car is larger than the consumed (or regenerative) power amount of the other car, the process proceeds to step S5.

In this step S5, it is determined whether or not the traveling time to the next stop floor of the own car is shorter than the traveling time to the next stop floor of the other car. If the traveling time to the next stop floor of the car is shorter than the traveling time to the next stop floor of the other car, the process proceeds to step S6.

In step S6, the speed setting unit 10d determines the regenerative (or consumed) power amount of the own car and the consumed (or regenerative) power amount of the other car within a range in which the traveling time of the own car does not exceed the traveling time of the other car. The speed of the car is calculated so that the difference between the two is as small as possible. Specifically, the traveling speed of the own car is set to be reduced so that the overlap time between the regenerating (or powering) driving of the own car and the powering (or regenerating) driving of the other car 1 is as long as possible. .

In step S7 following step S6, the speed setting unit 10d sends the command value for the speed of the own car obtained in step S6 to the elevator control device 9, and the elevator control device 9 determines the speed of the car according to the command value. Set. In step S8, the elevator controller 9 starts the car 1 (own car) and causes the car 1 (self car) to travel to the next stop floor at the speed set in step S7. Control.

On the other hand, if there is no other car currently running that is the consumed (or regenerated) electric energy that can be mutually compensated for the regenerated (or consumed) electric energy of the own car in step S3, the own car is determined in step S4. If the regenerative (or regenerative) electric energy of the car is less than or equal to the consumed (or regenerative) electric energy of the other car, and the travel time to the next stop floor of the own car in step S5 until the next stop floor of the other car If it is equal to or longer than the travel time, the process proceeds from each step to step S9.

In step S9, the speed setting unit 10d sends a normal speed command value to the elevator control device 9, and sets the speed of the car to a normal one. Then, the process proceeds to step S8, and the elevator control device 9 controls the car 1 (own car) to leave the car 1 (own car) to the next stop floor at a normal speed.

Here, the speed setting (step S6 in FIG. 3) in the speed setting unit 10d will be described with a specific example. For example, suppose that the power prediction unit 10c predicts a regenerative operation for 15 seconds at a regenerative power amount of 100% of the maximum regenerative power amount when the car travels at a normal speed. Then, it is assumed that there is another car that is predicted to power-run for 20 seconds when the power consumption is 75% of the maximum power consumption.

Here, when the maximum regenerative power amount and the maximum power consumption amount are equal to each other, 25% (100% of the own car minus 75% of the other car) of the electric energy regenerated in the own car Is a wasteful regenerative power that is not used here. Therefore, the speed setting unit 10d sets the traveling speed to be lower than usual so that the traveling time of the own car becomes 20 seconds so that the regenerative power in the own car can be consumed without waste by another car.

Since the regenerative electric energy is roughly proportional to the number of revolutions of the hoisting machine 3, when the traveling time of the own car is changed from 15 seconds to 20 seconds, the regenerative electric energy decreases from 100% to 75%. Since the regenerative power amount is 75% and the regenerative operation is performed for 20 seconds, all of the regenerative power of the own car can be used with other cars without waste.

In the above description, for convenience of explanation, the case where the number of elevators (cars 1) is two has been described, but the total amount of regenerative power and the amount of power consumed are also the same in the case of three or more. The traveling speed of the car 1 is set so that the difference from the total amount is small and the time for consuming regenerative power is long.

In addition, although it is intended to lengthen the overlap time between regenerative operation and power running operation, if the traveling speed is reduced too much, there may be a problem in terms of driving efficiency (user transportation efficiency). . Therefore, a limit may be provided for the speed reduction amount (amount of increase in travel time) so that the travel speed does not decrease more than a predetermined decrease amount from the normal speed.

Furthermore, in the above, the case where the speed of the car 1 is reduced in order to increase the overlap time between the regenerative operation and the power running operation has been described. However, the overlap time between the regenerative operation and the power running operation may be increased. If possible, the speed may be increased within a range that does not hinder the safety of the elevator.

Furthermore, if the speed setting unit 10d can lengthen the overlap time between the regenerative operation and the power running operation, the speed setting unit 10d is not limited to the speed of the car 1 itself, for example, the acceleration or deceleration of the car 1 or the hoisting machine 3 A specified value such as a drive torque may be set.

The elevator group management control device configured as described above is a regenerative system that regenerates electric power for a certain car from the current stop floor to the next stop floor based on the moving direction and load of the car. A power prediction unit that is a prediction unit that predicts a time for performing the regenerative operation or powering operation while predicting which operation or powering operation that consumes power, and the regenerative operation of the car predicted by the prediction unit Alternatively, when the prediction unit predicts that another car that is different from the car in the power running time is in a power running or regenerative operation, the regenerative operation or power running of the car and the other Calculate the overlap time that is the same as the power running or regenerative operation of the car at the same time, and calculate the overlap time while changing the traveling speed of the car. Has long overlap time is obtained demanded traveling speed, and the speed setting unit is a command setting unit for setting a command value of the running speed of the cab, the.

Therefore, the regenerative power of the elevator can be efficiently consumed by powering operation, and the energy consumption can be further reduced. Moreover, since it is not necessary to charge rechargeable power to a secondary battery, or the capacity | capacitance of a required secondary battery can be made small, the expense concerning a secondary battery can be reduced. Further, by consuming the regenerative power generated in the elevator by the elevator itself, the power regenerated in the power supply system of the building is reduced, and the influence on the electrical equipment of the building can be reduced.

The present invention can be used for an elevator group management control device that manages and controls a plurality of elevator cars as a group and uses regenerative power.

DESCRIPTION OF SYMBOLS 1 Passenger car 2 Main rope 3 Hoisting machine 4 Balance weight 5 Inverter 6 Converter 7 Commercial power supply 8 Landing button 9 Elevator control device 10 Elevator group management control device 10a Landing call registration part 10b Landing call allocation part 10c Electric power prediction part 10d Speed setting Part

Claims

An elevator group management control device that manages and controls a plurality of elevator cars as a group,
Predicting whether the operation from the current stop floor to the next stop floor is a regenerative operation that regenerates power or a power running operation that consumes power based on the moving direction and load of the car. And a prediction unit for predicting the time for the regenerative operation or power running operation,
In the time of the regenerative operation or power running of the car predicted by the prediction unit, when the prediction unit predicts that another car different from the car is power running or regenerative operation, The overlap time in which the regenerative operation or power running operation of the car is overlapped with the power running operation or regenerative operation of the other car at the same time is calculated, and the overlap time is changed while changing the traveling speed of the car. An elevator group management control device, comprising: a command setting unit that calculates a travel speed at which a longer overlap time is obtained by calculating the travel speed and sets a command value for the travel speed of the car.
The said command setting part calculates | requires the acceleration or deceleration of the said car from which the said duplication time longer is obtained, and sets the command value of the acceleration or the deceleration of the said car, The Claim 1 characterized by the above-mentioned. Elevator group management control device.
The command setting unit obtains a torque amount of a hoisting machine that drives the car that can obtain the longer overlap time, and sets a command value for the torque amount of the hoisting machine that drives the car. The elevator group management control device according to claim 1.
The said command fixed part sets the said command value of the said car so that the traveling speed of the said car may not reduce more than predetermined amount compared with a normal traveling speed. The elevator group management control device according to any one of claims 3 to 4.