JP2014001020A - Elevator group management apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strike a balance between power consumption reduction at a peak time zone for electric power demand, and operation efficiency in the other time zones.SOLUTION: An evaluation function change unit 7 changes an evaluation function of an allocated cage determination unit 6 based on data transmitted from an electric power peak time zone determination unit 3. That is, when an electric power peak state signal transmitted from the electric power peak time zone determination unit 3 is ON, k=Kis set for a power consumption weighting coefficient, and when the electric power peak state signal is OFF, k=Kis set for a power consumption weighting coefficient of a formula 2 and a formula 3. At this time, K>K, in order to give priority to power consumption in the electric power peak time zone.

Description

  The present invention relates to an elevator group management apparatus that determines an assigned car from among a plurality of elevator cars in response to a hall call.

  Generally, the power demand peaks at 13:00 to 16:00 in the summer, and it is required to suppress the power demand in order to stabilize power supply during this peak time zone. Moreover, since contract power is determined based on the maximum power consumption of the past one year, if the building power demand peak is reduced, the basic charge based on contract power can be reduced.

  On the other hand, elevator elevator hours in office buildings are at work in the morning, at lunch and at work, and do not overlap with peak hours of power demand for the entire building. For this reason, even if the power consumption of the elevator is suppressed during the peak power demand period of the building, the influence on the operation efficiency of the elevator is small.

  For this reason, in the conventional elevator group management apparatus, the target value of the power consumption during the designated period is set, and the power consumption and the average waiting time are statistically recorded for each time zone, and the power consumption Based on the target value, the recorded power consumption and the average waiting time, the number of operating elevators for each time zone is determined (for example, see Patent Document 1).

  In addition, in a conventional elevator power consumption control device, the predicted value of power consumption due to the operation of the car is compared with the upper limit value of the demand power amount, and if the predicted value exceeds the upper limit value, the door opening time is extended. The amount of power consumption is suppressed by limiting the cage speed (see, for example, Patent Document 2).

  Further, in the conventional elevator group control method, the car is allocated so that the power consumption of the elevator is minimized under the condition that the operation time becomes the target value (for example, see Patent Document 3). .

  Furthermore, in other conventional elevator group management devices, the weighting factor of the waiting time and power consumption in the evaluation function for determining the assigned car is variable, and the car using the optimum weighting factor that satisfies the target value is used. Is controlled (for example, see Patent Document 4).

JP 2010-70380 A Japanese Examined Patent Publication No. 61-46391 Japanese Patent No. 4177668 JP 58-63668 A

  In the conventional control methods as described above, various controls are performed under conditions that satisfy the target value, so it is necessary to set an appropriate target value for each property according to the elevator specifications, building specifications, usage pattern, etc. was there. In addition, in the conventional control method, there is no distinction between the peak time zone of power demand and other times, so the same control is performed in the peak time zone where power consumption should be reduced most and other time zones. There has been a problem that the effect of reducing the amount of power consumption in the peak hours is reduced, and the operation efficiency of the elevator is constantly deteriorated.

  The present invention has been made to solve the above-described problems, and is an elevator group capable of achieving both a reduction in power consumption during peak hours of power demand and a balance between operation efficiency in other times. The purpose is to obtain a management device.

  The elevator group management apparatus according to the present invention includes an allocated car determination unit that determines an allocated car based on an evaluation function including a variable related to a waiting time of a car and a variable related to power consumption, and the current time zone is an electric power demand. An evaluation function changing unit that changes a weight of a variable related to power consumption with respect to a variable related to waiting time according to whether or not it is a peak time zone, and the evaluation function changing unit includes a peak time zone in a peak time zone of power demand. Compared to other cases, the weight of the variable related to the power consumption is relatively increased.

  The elevator group management device according to the present invention increases the weight of a variable related to the amount of power consumption in a peak time zone of power demand in a peak time zone of power demand, as compared with a case other than the peak time zone. It is possible to achieve a balance between power consumption reduction and operation efficiency in other time zones.

It is a block diagram which shows the principal part of the control system of the apparatus in a building containing the elevator group management apparatus by Embodiment 1 of this invention. It is a flowchart which shows the operation | movement at the time of the new hall call generation of the elevator group management apparatus of FIG. It is a block diagram which shows the principal part of the control system of the apparatus in a building containing the elevator group management apparatus by Embodiment 2 of this invention. It is a flowchart which shows the operation | movement at the time of the empty car generation | occurrence | production of the elevator group management apparatus of FIG. It is a block diagram which shows the principal part of the control system of the apparatus in a building containing the elevator group management apparatus by Embodiment 3 of this invention. It is a flowchart which shows the operation | movement at the time of the new hall call generation of the elevator group management apparatus of FIG. 12 is a graph showing the relationship between the degree of congestion and the assigned car evaluation function when the power peak state signal is ON in the third embodiment. 12 is a graph showing the relationship between the degree of congestion and the assigned car evaluation function when the power peak state signal is OFF in the third embodiment. It is a flowchart which shows the operation | movement at the time of the new hall call generation of the elevator group management apparatus by Embodiment 4 of this invention. 14 is a graph showing a relationship between a power consumption weighting factor, a power peak state degree, and a congestion degree in the fourth embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing a main part of a control system for equipment in a building including an elevator group management apparatus according to Embodiment 1 of the present invention. In the figure, the building energy management apparatus 1 has a power demand collection unit 2 and a power peak time zone determination unit 3. The electric power demand collecting unit 2 is configured based on information from a plurality (n) of wattmeters 4-1 to 4-n installed in the building, and includes electric devices (air conditioners, lighting devices, and OA devices in the building). Etc.) and measure the power demand in the building that changes from moment to moment.

  The power peak time zone determination unit 3 determines whether the current time zone is a peak time zone of power demand in the building based on a preset condition. Specifically, the power peak time zone determination unit 3 determines that it is a peak time zone when the current power demand obtained from the power demand collection unit 2 exceeds a predetermined value.

  When it is determined that the current time zone is the peak time zone, the power peak time zone determination unit 3 transmits the power peak state signal to the elevator group management device 5 as ON. Further, when it is determined that the current time zone is not the peak time zone, the power peak time zone determination unit 3 turns off the power peak state signal. That is, the elevator group management device 5 detects the peak time zone of power demand based on the information from the power peak time zone determination unit 3.

  The elevator group management device 5 manages a plurality of (four in FIG. 1) elevators installed in the building as a group. In addition, the elevator group management device 5 includes an assigned car determination unit 6 and an evaluation function change unit 7.

  A plurality of hall call registration devices 8-1 to 8-3 and a plurality of vehicle control devices 9-1 to 9-4 are connected to the assigned car determination unit 6. The hall call registration devices 8-1 to 8-3 are installed at halls on a plurality of stop floors. Each of the vehicle control devices 9-1 to 9-4 controls the operation of the corresponding elevator.

  The assigned car determination unit 6 determines an assigned car for the hall calls registered by the hall call registration devices 8-1 to 8-3, and each of the vehicle control devices 9-1 to 9 corresponding to the decided assigned car. -4 is instructed to dispatch to the landing call generation floor.

The assigned car determination unit determines the assigned car based on an evaluation function including a variable related to the waiting time of the car and a variable related to the power consumption. The determination method of the allocation car C is shown in the following formulas 1-3.

In Equations 1 to 3, n: car number, k _w : waiting time weight coefficient, wt _ni : predicted waiting time for hall call i assigned to a certain car, k _e : power consumption weight coefficient, pow _ni : some car A _bef (n): Evaluation function before new registration hall call assignment for car n, A _aft (n): Evaluation function after new registration hall call assignment for car n , H _bef (n), H _aft (n): Allocated hall call set before and after newly registered hall call assignment for car n, R _bef (n), R _aft (n): Before and after newly registered hall call assignment for car n Is a set of travel sections by registered calls.

The evaluation function changing unit 7 changes the evaluation function of the assigned car determining unit 6 based on the data transmitted from the power peak time zone determining unit 3. That is, when the power peak state signal transmitted from the power peak time zone determination unit 3 is ON, k _e = K _e1 is set as the power consumption weighting coefficient of Equation 2 and Equation 3, and the power peak state signal is OFF. In this case, k _e = K _e2 is set as the power consumption weighting coefficient of Equation 2 and Equation 3. At this time, K _e1 > K _e2 is set in order to emphasize the power consumption amount in the power peak time zone.

  The building energy management device 1 and the elevator group management device 5 can be configured by independent computers.

FIG. 2 is a flowchart showing the operation of the elevator group management apparatus 5 of FIG. 1 when a new hall call is generated. When a new hall call is generated, the elevator group management device 5 checks whether the power peak state signal from the building energy management device 1 is ON (step S1). If the power peak state signal is ON, K _e1 is set as the power consumption weighting factor k _e (step S2). If the power peak state signal is OFF, K _e2 is set as the power consumption weighting factor k _e (step S3).

Thereafter, determining the allocated car by using the weight coefficient k _e set (step S4). Then, the vehicle controller 9-1 to 9-4 corresponding to the determined assigned car is instructed to dispatch to the landing call generation floor (step S5).

  In such an elevator group management device 5, when it is determined by the power peak time zone determination unit 3 that it is a peak time zone, the weight of the variable related to the power consumption at the time of allocating the car is set in a case other than the peak time zone. Since it is relatively large as compared with the above, it is possible to greatly reduce the amount of power consumption during peak hours. Further, convenience can be maintained by relatively reducing the weight of the power consumption during time periods other than the peak time period. That is, it is possible to achieve a balance between the reduction in power consumption in the peak time period of power demand and the operation efficiency in other time periods.

In the above description, in the allocated car evaluation function, the power consumption amount in the currently planned travel section is used as the evaluation value. However, not only the currently planned travel section but also the travel that is assumed to travel in the future. The power consumption of the section may also be included.
Moreover, in Formula 2 and Formula 3 of the allocation car evaluation function described above, the power consumption is used as the evaluation value, but the distance of the planned traveling section may be used as the evaluation value instead of the power consumption.

Further, in Equations 2 and 3, a linear sum of predicted waiting times is used, but the m-th power sum of predicted waiting times is used so that the weight of the waiting time in a busy time with a long waiting time becomes strong, and A _bef ( n) and A _aft (n) may be the following formulas 4 and 5. However, m> 1.

  In the assigned car evaluation function of Equation 4, the waiting time (wt) is the sum of m-th power and the power consumption (pow) is a linear sum, and the increase rate of the waiting time with respect to the congestion degree is the power consumption amount with respect to the congestion degree. It becomes larger than the increase rate (m> 1). That is, the increasing rate of the waiting time slope in the assigned car evaluation function is larger than the increasing rate of the power consumption (the order of the waiting time is greater than the order of the power consumption).

  As in these equations 4 and 5, when determining the assigned car by using the m-th power sum of the waiting time in the assigned car evaluation function, the waiting time is emphasized if it is congested, and if it is not congested. Since the power consumption can be emphasized, it is possible to prevent a decrease in convenience during congestion.

Furthermore, in the above description, and to change the power consumption weighting coefficient k _e in Formula 2 and Formula 3, if peak power status signal is ON, k _w latency weighting factor of Formula 2 and Formula 3 = K _w1 is set, and when the power peak state signal is OFF, k _w = K _w2 may be set as the waiting time weighting coefficient of Equation 2 and Equation 3. However, K _w1 <K _w2 is set in order to emphasize the amount of power consumption during the power peak time period.

Embodiment 2. FIG.
Next, FIG. 3 is a block diagram showing a main part of a control system for equipment in a building including an elevator group management apparatus according to Embodiment 2 of the present invention. The elevator group management apparatus 5 according to the second embodiment includes a distributed standby operation unit 11 and a distributed standby operation adjustment unit 12. In the elevator group management apparatus 5 according to the second embodiment, the service floor is registered in a plurality of zones in the vertical direction. In this example, the service floor is registered in two parts, a lower floor zone and an upper floor zone located above the lower floor zone.

  The distributed standby operation unit 11 determines whether or not there is a waiting car in the upper floor zone or the lower floor zone when an empty car that has been serviced for all calls is generated, and in a zone that does not have a waiting car, Deliver an empty basket (forward).

  The distributed standby operation adjustment unit 12 changes the operation of the distributed standby operation unit 11 according to the power peak state signal transmitted from the power peak time zone determination unit 3. Specifically, the distributed standby operation adjustment unit 12 invalidates the operation of the distributed standby operation unit 11 when the power peak state signal is ON, and when an empty car is generated, an empty car is empty in a zone where there is no standby car. Do not dispatch the car.

  On the other hand, when the power peak state signal is OFF, the distributed standby operation adjustment unit 12 validates the operation of the distributed standby operation unit 11, and dispatches an empty car in another zone to a zone where there is no standby car. Other configurations are the same as those of the first embodiment, and although omitted in FIG. 3, the elevator group management device 5 is provided with an assigned car determination unit 6 and an evaluation function change unit 7.

  FIG. 4 is a flowchart showing the operation of the elevator group management device 5 of FIG. 3 when an empty car is generated. When an empty car is generated, the elevator group management device 5 checks whether or not the power peak state signal from the building energy management device 1 is ON (step S11). If the power peak state signal is ON, the empty car is not dispatched (step S12).

  If the power peak state signal is OFF, it is confirmed whether there is a waiting car in the lower floor zone (step S13). If there is no waiting car in the lower floor zone, an empty car is dispatched to the lower floor zone (step S14).

  If there is a waiting car in the lower floor zone, it is checked whether there is a waiting car in the upper floor zone (step S15). If there is no waiting car in the upper floor zone, an empty car is dispatched to the upper floor zone (step S16). If there is a waiting car in both the lower floor zone and the upper floor zone, the empty car is not dispatched (step S12).

  In such an elevator group management device 5, when the power peak state signal is ON, by restricting (suppressing) the distributed standby operation, the number of empty car starts and the travel distance are reduced. It becomes possible to reduce the amount of electric power. In addition, convenience can be maintained by performing a distributed standby operation in a time zone other than the peak time zone. That is, it is possible to achieve a balance between the reduction in power consumption in the peak time period of power demand and the operation efficiency in other time periods.

In addition, when the power peak state signal is ON, the operation of the distributed standby operation unit 11 is not completely invalidated. For example, the distributed standby operation is performed only when the deviation of the frequency of landing call occurrence in the UP direction or the DOWN direction is large. You may make it implement.
In the above example, the service floor is divided into two zones, but may be divided into three or more zones.

Embodiment 3 FIG.
Next, FIG. 5 is a block diagram showing a main part of a control system for equipment in a building including an elevator group management apparatus according to Embodiment 3 of the present invention. The elevator group management apparatus 5 according to Embodiment 3 includes an assigned car determination unit 6, an evaluation function change unit 7, and a congestion degree determination unit 13. The congestion degree determination unit 13 determines the current congestion degree from the number of passengers generated in the past 5 minutes, the waiting time for assigned hall calls, the car load, and the like.

When the power peak state signal is ON, the weight coefficient k _e of the power consumption amount of A _bef (n) (see Equation 2) and A _aft (n) (see Equation 3) in the assigned car evaluation function is the congestion degree determination unit 13 is a function of the degree of congestion J obtained from 13. Equation 6 is a function of the weighting coefficient _{k e} of the power _consumption, a 1, _{b 1} are coefficients.
k _e (J) = a ₁ J + b ₁ (Expression 6)
However, a ₁ > 0 and b ₁ ≧ 0.

On the other hand, if peak power state signal is _OFF, the function of the weighting coefficient _{k e} of the power consumption of the _A bef (n) (see Equation 2) and _A aft (n) (see equation 3) and Equation 7. a ₁ and b ₁ are coefficients.
k _e (J) = a ₂ J + b ₂ (Expression 7)
However, a ₂ <0, b ₂ > 0, and b ₁ > b ₂ .

FIG. 6 is a flowchart showing the operation of the elevator group management apparatus 5 of FIG. 5 when a new hall call is generated. When a new hall call is generated, the elevator group management device 5 checks whether the power peak state signal from the building energy management device 1 is ON (step S21). If ON the power peak condition signal, it detects a current congestion degree J (step S22), and determines the weighting coefficients k _e of energy consumption by increasing function with respect to the degree of congestion (step S23).

Also, if OFF the power peak condition signal, it detects a current congestion degree J (step S24), and determines the weighting coefficients k _e of the power consumption by decreasing function with respect to the degree of congestion (step S25).

Thereafter, determining the allocated car by using the weight coefficient k _e set (step S26). Then, the vehicle controller 9-1 to 9-4 corresponding to the determined assigned car is instructed to dispatch to the landing call generation floor (step S27).

FIG. 7 is a graph showing the relationship between the congestion degree J when the power peak state signal is ON and the assigned car evaluation function A _bef (n), and FIG. 8 is the congestion degree J when the power peak state signal is OFF and the assigned car. It is a graph which shows the relationship with evaluation function A _bef (n).

  In such an elevator group management device 5, when the power peak state signal is ON, the weight of the power consumption at the time of allocating the car is increased, and the weight of the power consumption is further increased according to the degree of congestion. It is possible to greatly reduce the power consumption at the time of power peak. Further, when the power peak state signal is OFF, the weight of the power consumption amount is reduced when it is congested, and the weight of the power consumption amount is increased when it is not crowded, so that both convenience and energy saving can be achieved.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. The configuration of the elevator group management device 5 of the fourth embodiment is such that a power peak state degree determination unit is provided instead of the power peak time zone determination unit 3 of FIG. The power peak state degree determination unit determines the power peak state degree that is the degree of power demand from the measurement results of the power meters 4-1 to 4-n. The power peak state degree P is a ratio of the current power demand to the assumed maximum power demand of the building, or the current power demand with respect to a predetermined threshold exceeding the assumed maximum power demand of the building (difference between the assumed maximum power demand and the threshold). Of the predetermined threshold (the difference between the current power demand and the threshold).

The determined power peak state degree is transmitted to the elevator group management device 5. Evaluation function changing unit 7, based on the power peak state of P and congestion J, determines the weighting coefficients _{k e} of the power consumption in the assigned car evaluation function _{A bef} (n) and _{A aft} (n). The weighting factor _{k e} of the power consumption shown in Equation 8-10.
k _e (J, P) = F ₁ (P) · J + F ₂ (P) (Equation 8)
F ₁ (P) = a ₃ P−b ₃ (Equation 9)
F ₂ (P) = a ₄ P + b ₄ (Expression 10)
However, a ₃ > 0, b ₃ > 0, a ₄ > 0, and b ₄ > 0.

  FIG. 9 is a flowchart showing an operation of the elevator group management apparatus 5 according to the fourth embodiment when a new hall call is generated. When the new hall call is generated, the elevator group management device 5 acquires the power peak state degree P from the building energy management device 1 (step S31). Further, the current congestion degree J is detected from the number of passengers generated in the past 5 minutes, the waiting time for the assigned hall call, and the car load (step S32).

Then, the elevator group management system 5, with a peak power condition of P and congestion J, the formula 8-10, determines the weighting coefficients k _e of the power consumption. Thereafter, determining the allocated car by using the weight coefficient k _e set (step S26). Then, the vehicle controller 9-1 to 9-4 corresponding to the determined assigned car is instructed to dispatch to the landing call generation floor (step S27).

Figure 10 is a graph showing the relationship between the weighting factor k _e and the power peak states of P and congestion J of power consumption. 10, when viewed certain congestion degree J, the weight coefficient k _e is increased with an increase in the peak power condition of P. Further, when the peak power condition of P is in a predetermined value P _1, the weighting factor k _e is constant or nearly constant with the congestion degree J.

Further, when the power peak state degree P is higher than the predetermined value P ₁ , the weighting factor k _e increases as the congestion degree J increases, and the slope (positive slope) increases as the power peak state degree P increases. . Furthermore, when the peak power condition of P is smaller than the predetermined value P _1, the weighting factor k _e is lower according congestion J is increased, the slope (negative slope) is more peak power condition of P becomes high large.

In such an elevator group management system 5, based on the power peak state of P and congestion J, as it determines the weighting coefficients k _e of power consumption, congestion when power demand in the building is close to the power peak The power consumption can be greatly reduced regardless of the state. Further, when the power demand in the building is small, the waiting time can be reduced if it is congested, and energy saving can be achieved if it is not congested. Therefore, it is possible to achieve a balance between the reduction of power consumption in the peak time zone of power demand and the operation efficiency in other time zones.

In addition, about Embodiment 1-4, the electric power peak time zone determination part 3 may be provided in the elevator group management apparatus 5 side, and may be made independent from the building energy management apparatus 1 and the elevator group management apparatus 5.
In the above description, it is determined whether or not it is a power peak time zone based on the total power value of the building energy management device 1 or the power peak state degree is obtained. On the input screen of the elevator monitoring device or the elevator group management device 5, the operator may set manually.
Furthermore, the power peak state signal and the power peak state degree may be set based on a command from the monitoring center of the power company that manages power generation and power demand within the power company jurisdiction.
Furthermore, a schedule for power peak state ON and OFF and a schedule for the power peak state degree may be set in the elevator group management device 5 in advance.
Further, Embodiments 1 to 4 may be implemented in combination as appropriate.
Furthermore, about Embodiment 1-4, when an electric power peak state signal is ON, it is good also considering a one part machine as a dormant state by the elevator group management apparatus 5. FIG. In this case, the assigned car determination unit 6 does not assign a new call to the car in the dormant state. As a result, it is possible to further reduce the power consumption during the peak time period.
Further, the number and type of elevators controlled by the elevator group management device, the number of hall call registration devices connected to the elevator group management device, and the like are not particularly limited.

  3 power peak time zone determination unit, 5 elevator group management device, 6 assigned car determination unit, 7 evaluation function change unit, 11 distributed standby operation unit, 12 distributed standby operation adjustment unit, 13 congestion degree determination unit.

Claims (7)

Based on an evaluation function including a variable relating to the waiting time of the car and a variable relating to the amount of power consumption, an allocation car determining unit that determines the allocation car, and depending on whether the current time zone is a peak time zone of power demand An evaluation function changing unit that changes the weight of the variable related to the power consumption relative to the variable related to the waiting time,
The evaluation function changing unit increases the weight of a variable related to the power consumption amount in a peak time zone of power demand as compared to a case other than the peak time zone.   The elevator group management apparatus according to claim 1, wherein an increase rate of the slope of the waiting time in the evaluation function of the assigned car determination unit is larger than an increase rate of the power consumption. The service floor is divided into multiple zones, and the distributed standby operation unit that dispatches the empty car that has been serviced to the zone without the standby car, and whether the current time zone is the peak hour of power demand A distributed standby operation adjustment unit that changes the operation of the distributed standby operation unit according to
The distributed standby operation adjusting unit restricts the operation of the distributed standby operation unit during a peak time period of power demand. A congestion degree determination unit for determining the degree of congestion of the elevator,
An assigned car determination unit that determines an assigned car based on an evaluation function including a variable related to a waiting time of a car, a variable related to power consumption, and a weighting factor of the variable related to power consumption, and the current time zone is a power demand An evaluation function changing unit that changes a weighting factor of a variable related to power consumption according to whether or not it is a peak time zone of
The evaluation function changing unit sets a weighting factor of a variable related to power consumption to a value that increases with respect to the congestion degree in a peak time zone of power demand, and consumes power in a time zone other than the peak time zone of power demand. An elevator group management apparatus characterized in that a weighting factor of a variable relating to a quantity is set to a value that decreases with respect to the degree of congestion.   Based on information from the power peak time zone determination unit that determines whether the current time zone is the peak time zone of power demand in the building based on the power consumption measured by multiple power meters in the building, The elevator group management device according to any one of claims 1 to 4, wherein a peak time zone of power demand is detected. A congestion degree determination unit for determining the degree of congestion of the elevator,
An assigned car determination unit that determines an assigned car based on an evaluation function including a variable related to the waiting time of the car, a variable related to power consumption, and a weighting factor of the variable related to power consumption;
An evaluation function changing unit that changes a weighting factor of a variable related to power consumption according to the power peak state degree and the degree of congestion that is the degree of power demand,
When the power peak state degree is higher than the predetermined value, the weighting factor of the variable related to the power consumption amount increases as the congestion degree increases, and the positive slope increases as the power peak state degree increases.
When the power peak state degree is smaller than a predetermined value, the weighting factor of the variable related to the power consumption amount decreases as the congestion degree increases, and the negative slope increases as the power peak state degree increases. Elevator group management device.   The elevator group management apparatus according to any one of claims 1 to 6, wherein at least one car is put into a dormant state during a peak time period of power demand.

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