JP2014222959A - Demand control device and demand control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a demand control device capable of reducing power consumption even in a period in which there is a margin in power.SOLUTION: A demand control device 4 includes: target power setting means (control part 40) for setting a target power value G which does not exceed a contract power value on the basis of predicted power consumption M predicted to be consumed in load equipment 2 whose power is consumed; demand control determination means (control part 40) for determining whether to perform demand control to limit power consumption in the load equipment 2 on the basis of actual power consumption P actually consumed in the load equipment 2 and the set target power value G; and demand control means (control part 40) for performing demand control to limit the power consumption in the load equipment 2 when it is determined that the power consumption in the load equipment 2 is limited.

Description

  The present invention relates to a demand control device and a demand control system, and more particularly to a demand control device and a demand control system that determine whether or not to perform demand control that limits power consumption in a load device.

  Conventionally, a demand control apparatus and a demand control system that perform demand control are known (for example, see Patent Document 1).

  Patent Document 1 discloses an energy management system that performs demand control by obtaining a demand forecast value based on weather data, a driving schedule of a load facility, and the like, and a load adjustment range based on an optimization calculation result using a plurality of indices. Is disclosed. In the energy management system described in Patent Document 1, when the demand forecast value at a predetermined time exceeds the load target value based on the contract power, the time zone for driving the load facility is changed from the time when the contract power is exceeded to the load adjustment range. It is configured to adjust the power load so as not to exceed the contracted power by performing demand control that shifts (peak shifts) in any one of the time zones.

JP 2010-204833 A

  However, in the energy management system described in Patent Document 1, since the load target value is determined based on the contract power, the time between the contract power (the load target value) and the demand forecast value is small and there is no room for power. A band (period) and a time slot in which the difference between the contract power (load target value) and the demand forecast value is large and there is a margin in power are generated. For this reason, in the time zone when there is a margin in power, it is considered that power is hardly consumed exceeding the contract power, so that power consumption is hardly limited (demand control) in the load facility. Therefore, even if there is power that can be reduced in a time zone where there is a margin in power, the power is consumed, and thus there is a problem that the power consumption in the energy management system cannot be reduced sufficiently.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a demand control device capable of reducing power consumption even during a period when there is a margin in power, and It is to provide a demand control system.

  The demand control device according to the first aspect of the present invention sets a target power value that does not exceed a contract power value based on a predicted power consumption amount that is predicted to be consumed in a load device that consumes power. Demand control determination for determining whether to perform demand control for limiting power consumption in the load device based on the setting means, the actual power consumption actually consumed in the load device, and the set target power value And demand control means for performing demand control for limiting power consumption in the load device when it is determined to perform demand control.

  In the demand control apparatus according to the first aspect of the present invention, as described above, the target power setting means sets a target power value that does not exceed the contract power value based on the predicted power consumption, and determines the demand control determination. The means is configured to determine whether or not to perform demand control for limiting power consumption in the load device, based on the actual power consumption and the set target power value. As a result, whether or not to perform demand control in a period when the target power value is set based on the predicted power consumption and the predicted power consumption is significantly smaller than the contract power value and there is a margin for power. Since the target power value serving as a criterion for determination can be reduced based on the actual power consumption, it is possible to easily limit power consumption (demand control) in the load device even during a period when there is a margin in power. . As a result, it is possible to reduce power consumption even in a period when there is a margin in power. Note that “perform demand control” in this specification means performing control that actually limits power consumption in a load device, and performing control that does not limit power consumption by simply monitoring the amount of power. It is not included.

  In the demand control apparatus according to the first aspect, preferably, the target power setting means is configured to individually obtain a target power value for each predetermined first period and to update for each first period. If comprised in this way, since a target power value can be newly set for every 1st period based on estimated power consumption, the target power value corresponding to the tendency of the power consumption in a 1st period is appropriate. Can be set to Thereby, the power consumption in the demand control system can be further reduced.

  In this case, it is preferable that the demand control determination unit is based on the accumulated actual power consumption from the start time of the first period for each predetermined second period shorter than the first period within the first period. The predicted power consumption in the first period is sequentially obtained, and when the calculated predicted power consumption exceeds the target power value, it is determined that the demand control is performed. If comprised in this way, from the start time of a 1st period to the end time by calculating | requiring sequentially the estimated power consumption in a 1st period based on the accumulated actual power consumption from the start time of a 1st period. The accumulated actual power consumption (actual power consumption within the first period) and the predicted power consumption can be more approximated. Thereby, since demand control can be performed when the predicted power consumption approximate to the actual power consumption within the first period exceeds the target power value, the demand control can be performed more accurately.

  In the configuration in which the demand control is performed when the predicted power consumption exceeds the target power value, the demand control determination unit preferably performs the first period every second period while the demand control is being performed. Based on the accumulated actual power consumption from the start time point, the predicted power consumption in the first period is sequentially obtained, and when the calculated predicted power consumption is equal to or less than the target power value, the demand control is canceled. It is configured to judge. With this configuration, demand control can be canceled when the predicted power consumption approximate to the actual power consumption within the first period is equal to or less than the target power value, so demand control is released at an appropriate timing. can do. Thereby, it can suppress that demand control is performed more than necessary.

  In the demand control device according to the first aspect, preferably, the target power setting means obtains the predicted power consumption based on the actual power consumption and the weather condition at the installation location of the load device, and the calculated predicted consumption. The target power value is set based on the power amount. If comprised in this way, estimated power consumption can be calculated | required more appropriately by adjusting the actual power consumption actually consumed until now based on the weather conditions in the installation place of a load apparatus.

  In this case, preferably, the target power setting means is configured to obtain the predicted power consumption based at least on the actual power consumption and the temperature fluctuation at the installation location of the load device. If comprised in this way, the predicted power consumption can be calculated | required more appropriately by adjusting the actual power consumption actually consumed until now based on the fluctuation | variation of the temperature in the installation place of a load apparatus. In particular, when load equipment includes equipment that easily increases or decreases in power consumption according to temperature fluctuations, such as air conditioning equipment and refrigeration equipment, obtain the predicted power consumption based on temperature fluctuations. Thus, the predicted power consumption can be obtained more accurately.

  The demand control system according to the second aspect of the present invention sets a target power value that does not exceed the contract power value based on the load device that consumes power and the predicted power consumption that is predicted to be consumed in the load device. Based on the target power setting means to be set, the actual power consumption actually consumed in the load device, and the set target power value, it is determined whether or not to perform demand control for limiting the power consumption in the load device. A demand control determining unit that limits power consumption in the load device when it is determined to perform demand control.

  In the demand control system according to the second aspect of the present invention, as described above, the target power setting means sets a target power value that does not exceed the contract power value based on the predicted power consumption, and determines the demand control. The means is configured to determine whether or not to perform demand control for limiting power consumption in the load device, based on the actual power consumption and the set target power value. As a result, whether or not to perform demand control in a period when the target power value is set based on the predicted power consumption and the predicted power consumption is significantly smaller than the contract power value and there is a margin for power. Since the target power value serving as a criterion for determination can be reduced based on the actual power consumption, it is possible to easily limit power consumption (demand control) in the load device even during a period when there is a margin in power. . As a result, it is possible to reduce power consumption even in a period when there is a margin in power.

  According to the present invention, as described above, it is possible to reduce power consumption even in a period in which there is a margin in power.

It is the block diagram which showed the structure of the demand control system by one Embodiment of this invention. It is the figure which showed the timing of the demand control in the demand control system by one Embodiment of this invention in time series. It is the figure which showed the weather information acquired at 15:00 in the demand control system by one Embodiment of this invention. It is the figure which showed the weather information acquired at 15:30 in the demand control system by one Embodiment of this invention. It is the figure which showed the processing flow of the control part at the time of judgment of whether to perform demand control in the demand control system by one Embodiment of this invention. It is the figure which showed the processing flow of the control part at the time of the target electric power value update in the demand control system by one Embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of the invention will be described below with reference to the drawings.

  First, with reference to FIGS. 1-4, the structure of the demand control system 100 by one Embodiment of this invention is demonstrated.

  The demand control system 100 according to the present embodiment monitors the power consumption so that the maximum demand power consumed by the electricity consumer does not exceed the contracted power value with the power company, and when it is predicted to exceed the power consumption. , A system configured to limit power consumption (demand control). The demand control system 100 is configured such that the actual power consumption P is initialized every 30 minutes, and the actual power consumption P is newly measured from the start of the 30-minute period. The maximum value of the actual power consumption P measured every minute is the maximum demand power consumption.

  Moreover, the demand control system 100 is provided in the store 1 which is an electric consumer as shown in FIG. Further, the demand control system 100 is supplied with electric power from the load device 2 (the refrigerator 2a, the air conditioner 2b, the lighting device 2c, the showcase 2d, and the ventilation fan 2e) that consumes electric power, and the electric power company. And a demand control device 4 for monitoring power consumption in the load device 2 and for limiting power consumption of the load device 2 (demand control).

  The refrigerator 2a, the air conditioner 2b, the lighting device 2c, the showcase 2d, and the ventilation fan 2e of the load device 2 are a plurality of spaces in the store 1 (for example, a backyard for storing products, a shared space, and actual products are installed). Each exhibition space is individually provided, or can be divided and driven in each of the plurality of spaces (eg, stopped in one space and driven in the remaining spaces). It is configured. That is, the load device 2 is configured to be capable of demand control by being divided in each of the plurality of spaces of the store 1.

  The switchboard 3 has a function of supplying the power supplied to the switchboard 3 via the electric wires 101 to each load device 2 that consumes the power. In addition, the distribution board 3 is provided with a power monitoring device 30 for collecting power values supplied to all the load devices 2 every minute.

  The demand control device 4 includes a control unit 40 including a CPU, a ROM 41, a RAM 42, a communication unit 43, and a notification unit 44. The control unit 40 is configured to perform predetermined control based on a control program stored in the ROM 41. Detailed control contents of the control unit 40 will be described later.

The RAM 42 is used as a working memory that temporarily stores control parameters used when the control program is executed by the control unit 40. Further, the RAM 42, the following maximum demand power amount, and the target power maximum value G _max not exceeding the contracted power values are stored is entered by the user in advance. The RAM 42 is configured to store the calculated target power value G and the power information received from the power monitoring device 30 during power monitoring.

  Further, in the RAM 42, priority order information regarding which load device 2 is to be subjected to demand control when the power consumption of the load device 2 is limited (demand control is performed) is previously input by the user and stored. Has been. That is, the demand control system 100 is configured such that the user can set the priority order for which load device 2 performs the demand control.

  In the priority order information, for example, the load equipment 2 that needs to be normally operated as much as possible, such as the refrigerator 2a and the air conditioner 2b in the exhibition space, has a high priority. On the other hand, for example, the load device 2 that does not cause much trouble even if it is not operated normally, such as the air conditioner 2b and the lighting device 2c in the backyard (commodity storage space), has a low priority. Here, the load device 2 having a high priority is set to be demand-controlled only in an emergency such as a case where a predicted power consumption M, which will be described later, exceeds a contract power value, while the priority is low. The load device 2 is set to be demand-controlled prior to the other load devices 2 when the predicted power consumption M exceeds the target power value G.

  Further, the communication unit 43 has a function of receiving power information transmitted from the power monitoring device 30 and 10 in an area where the store 1 is located (installation location of the load device 2) from the external server 102 via the network. It has a function of acquiring information on the temperature and sunshine duration for each minute as weather information. The notification unit 44 includes a display and the like, and has a function of notifying (warning) a user that demand control is performed on a predetermined load device 2.

  Here, in the present embodiment, the control unit 40 performs control for determining whether or not to perform demand control during power monitoring, and control for obtaining and updating the target power value G used when performing demand control. Is configured to do.

  First, the control performed by the control unit 40 to determine whether to perform demand control will be described in detail.

  First, the control unit 40 determines the actual power consumption P accumulated by being actually consumed in the load device 2 from the start point when the actual power consumption P is initialized within a period of 30 minutes. It is configured to sequentially measure every minute. Note that the control unit 40 accumulates actual power consumption from the start time based on the power information newly acquired from the power monitoring device 30 via the communication unit 43 and the past power information stored in the RAM 42. The quantity P is configured to be measured. Further, the power information newly acquired from the power monitoring device 30 is configured to be stored in the RAM 42 each time it is acquired. 30 minutes and 1 minute are examples of the “first period” and the “second period” in the present invention, respectively.

Then, the control unit 40 is configured to calculate the predicted power consumption M for a period of 30 minutes from the measured actual power consumption P using a time series analysis method (moving average method). Specifically, as shown in FIG. 2, the control unit 40, at time t (current time), the inclination I _t to calculate the predicted consumed electric power amount M _t at time t, using equation (1) It is configured to calculate. At this time, the control unit 40 determines the actual power consumption P _t accumulated from the start time to the time _t , the actual power consumption P _t−1 accumulated from the start time to one minute before the time _t, and the start time. using the actual power consumption amount P _t-2, which is accumulated up to 2 minutes before the time t, the actual power consumption P _t-3 has been accumulated from the start to 3 minutes before time t from the slope I _t Is calculated. That is, the control unit 40 calculates the predicted power consumption M _t using not only the actual power consumption P accumulated up to the present time but also the actual power consumption P accumulated up to the time before the current time. Is configured to do.

なお、式（１）において、ａおよびｂは、任意の数である。

In the formula (1), a and b are arbitrary numbers.

Thereafter, the control unit 40 is actually a power consumption P _t accumulated from the start to time t, calculated on the basis of the inclination I _t, is configured to calculate the predicted consumed electric power amount M _t at time t ing.

  And the control part 40 judges whether the calculated | required predicted power consumption M exceeds the target power value G in the period for 30 minutes, and when it is judged that the predicted power consumption M exceeds the target power value G Is configured to determine that demand control is performed on the load device 2. And when it judges that the control part 40 performs demand control with respect to the load apparatus 2, it is comprised so that the demand control which restrict | limits the power consumption of the predetermined load apparatus 2 of the load apparatuses 2 may be performed. . The control unit 40 is an example of the “demand control determination unit” and the “demand control unit” in the present invention.

Specifically, the predicted power consumption M _T1 at the time T1 shown in FIG. 2, the predicted power consumption M T3 at the time _T3 , and the predicted power consumption M _T5 at the time _T5 are each 30 minutes. Target power value G1 for the period (14:30 to 15:00), target power value G2 for the period of 30 minutes (15:00 to 15:30), and period of 30 minutes (15: 30-16: 00), the control unit 40 performs the demand control of the predetermined load device 2 among the load devices 2 at the time T1, the time T3, and the time T5. Done.

  At this time, the control unit 40 selects the load device 2 that limits the power based on the priority order information stored in the RAM 42 and the excess amount O of the predicted power consumption M with respect to the target power value G, and the load It is configured to determine the degree of power limitation in the device 2 (whether it is completely stopped or power consumption is reduced by a certain rate). That is, the control unit 40 is configured to perform optimization processing that minimizes inconvenience due to power limitation.

  For example, at time T3, since the excess amount O2 is small, the demand control is performed only for the load device 2 having a low priority (not causing much trouble even if the normal operation is not performed). Further, since the excess amount O1 is medium at time T1, demand control is performed not only on the load device 2 having a low priority but also on the load device 2 having a medium priority. On the other hand, since the excess amount O3 is large at time T5, demand control is performed not only for the load device 2 having a low priority and the load device 2 having a medium priority but also for the load device 2 having a relatively high priority. Is done.

In addition, when there is a load device 2 that is already under demand control and when the predicted power consumption M is determined to be equal to or less than the target power value G, the control unit 40 performs demand control on the load device 2. It is determined to cancel, and all demand control of the load device 2 under demand control is cancelled. That is, as shown in FIG. 2, since the predicted power consumption MT2 at the time _T2 is equal to or less than the target power value G1 in the time period from 14:30 to 15:00, the control unit 40 performs the operation at the time T2. The demand device 2 is configured to cancel demand control of the load device 2 that has been demand-controlled.

Similarly, in the time zone from 15: 00 to 15:30, the predicted power consumption MT4 at time _T4 has become equal to or less than the target power value G2, so that the control unit 40 was demand-controlled at time T4. The load device 2 is configured to cancel demand control. Further, in the time zone from 15:30 to 16:00, the predicted power consumption MT6 at time _T6 has become equal to or less than the target power value G3. The apparatus 2 is configured to release demand control.

  As a result, demand control is not performed after the time T1 and after the time T2, after the time T3 and after the time T4, and after the time T5 and after the time T6 (demand control OFF), but from the time T1 to the time T2. Demand control is performed from time T3 to time T4 and from time T5 to time T6 (demand control ON).

  And it is comprised so that control which judges whether the above-mentioned demand control is performed by the control part 40 is performed sequentially for every minute shorter than 30 minutes within the period for 30 minutes.

  Further, since the actual power consumption P is initialized at the end of the 30-minute period, the control unit 40 cancels all demand control of the load device 2 that is demand-controlled at the end of the 30-minute period. Is configured to do.

  Next, the control performed by the control unit 40 to obtain and update the target power value G used when performing demand control will be described in detail.

  First, the control unit 40 determines the actual power consumption P in the previous 30-minute period, the temperature at the installation location of the load device 2, and the Based on weather information relating to sunshine hours (weather conditions), the predicted power consumption M for the current 30-minute period is calculated. The control unit 40 is configured to individually obtain and update a new target power value G based on the calculated predicted power consumption M. At this time, the target power value G is set to be equal to or less than the maximum demand power amount and less than the contract power value. The control unit 40 is an example of the “target power setting unit” in the present invention.

  As a specific example, in the time zone from 15:00 to 15:30 (period of 30 minutes), the control unit 40 sets the period of the previous 30 minutes at 15:00, which is the start time of the period of 30 minutes. The actual power consumption P1 in the time zone from 14:30 to 15:00 is calculated from the power information stored in the RAM. Further, the control unit 40 displays the temperature and sunshine duration information at the same time every 10 minutes and the forecast of the temperature and sunshine duration every 10 minutes as shown in FIG. It is configured to obtain as information. And the control part 40 is based on the actual power consumption P1 in the last time zone of 14: 30-15: 00, the fluctuation | variation of temperature, and the fluctuation | variation (climate conditions) of sunshine time this time from 15:00 to 00. The predicted power consumption M2 in the 15:30 time zone is calculated.

  At this time, in the time zone of 15: 00 to 15:30, the temperature of the previous day same time (the time zone of 15: 00 to 15:30 of the previous day) and the prediction are both rising, and the sunshine time Therefore, when the control unit 40 increases the predicted power consumption M2 in the current time zone from 15:30 to 15:30, more than the actual power consumption P1 in the previous time zone from 14:30 to 15:00. As a result, a multiplier α (α> 1) is calculated. As a result, the control unit 40 calculates the predicted power consumption M2 (= P1 × α) in the time zone from 15:00 to 15:30.

Thereafter, the control unit 40 reduces the target reduction amount from the predicted power consumption M2 (= P1 × α) in the calculated time zone of 15: 0 to 15:30, thereby obtaining a time of 15:00:00 to 15:30. A target power value G2 in the band is obtained. For example, when 5% reduction is the target, the target power value G2 is G2 = (1-0.05) × M2. Finally, the control unit 40 determines whether or not the calculated target power value G2 exceeds the maximum demand power amount and exceeds the target power maximum value _Gmax that is less than the contract power value, and the target power value G2 is When it is determined that the target power maximum value _Gmax is exceeded, the target power maximum value _Gmax is set to the target power value G2.

  As another example, as shown in FIG. 4, in the time zone from 15:30 to 16:00 (period of 30 minutes), the same time on the previous day (time zone from 15:30 to 16:00 on the previous day) Since both the temperature and the forecast are decreasing, and the sunshine hours are decreasing, the control unit 40 determines the predicted power consumption M3 in the current time zone from 15:30 to 16:00. A multiplier β (β <1) is calculated by being predicted to be smaller than the actual power consumption P2 in the time zone from 15: 00 to 15:30. As a result, the control unit 40 calculates the predicted power consumption M3 (= P2 × β) in the time period from 15:30 to 16:00, and the reduction target is reduced from the calculated predicted power consumption M2. Thus, the target power value G3 in the time zone from 15:30 to 16:00 is obtained.

  The control unit 40 is configured to update the target power value G by newly storing the obtained target power value G in the RAM 42. As a result, the control unit 40 is configured to obtain the target power value G individually for each 30-minute period and to update it for each 30-minute period.

  Next, a processing flow of the control unit 40 when determining whether to perform demand control will be described with reference to FIGS. 1 and 5.

  As shown in FIG. 5, first, in step S1, it is determined by the control unit 40 (see FIG. 1) whether or not one minute has passed since it was determined whether or not to perform the previous demand control. This process is repeated until it is determined that one minute has passed. If it is determined that one minute has elapsed, in step S2, the control unit 40 newly acquires power information from the power monitoring device 30 (see FIG. 1) via the communication unit 43 (see FIG. 1). The In step S3, the actual power consumption P accumulated from the start time based on the power information newly acquired by the control unit 40 and the past power information stored in the RAM 42 (see FIG. 1). Is measured, and the predicted power consumption M for a period of 30 minutes is calculated from the measured actual power consumption P using the time series analysis method described above.

  Thereafter, in step S4, the control unit 40 determines whether or not the calculated predicted power consumption M exceeds the target power value G in a period of 30 minutes. When it is determined that the predicted power consumption M exceeds the target power value G, the power consumption of a predetermined load device 2 among the load devices 2 (see FIG. 1) is performed by the control unit 40 in step S5. Demand control is performed to limit In step S <b> 6, the notification unit 44 notifies the warning unit 44 that the demand control is performed on the predetermined load device 2 by the control unit 40. And then. This control flow is terminated.

  On the other hand, if it is determined in step S4 that the predicted power consumption M is less than or equal to the target power value G, whether or not there is a load device 2 that is already demand-controlled by the control unit 40 in step S7. Is judged. When it is determined that there is no load device 2 that is demand-controlled, this control flow is ended. On the other hand, if it is determined that there is a load device 2 that is demand-controlled, all the demand control of the load device 2 is canceled by the control unit 40 in step S8. In step S9, the control unit 40 notifies the notification unit 44 (see FIG. 1) that demand control for the predetermined load device 2 has been released. And this control flow is complete | finished.

  Next, a processing flow of the control unit 40 when updating the target power value will be described with reference to FIGS. 1, 3, 4, and 6.

  As shown in FIG. 6, first, in step S11, the control unit 40 (see FIG. 1) determines whether or not it is the start time of a period of 30 minutes, and until it is determined that it is the start time. This process is repeated. If it is determined that it is the start time, in step S12, the control unit 40 causes the weather information (FIG. 3 and FIG. 3) from the external server 102 (see FIG. 1) via the communication unit 43 (see FIG. 1). 4) is acquired. In step S13, the control unit 40 determines the current power consumption P in the previous 30-minute period and the current weather information about the weather conditions at the installation location of the load device 2 (see FIG. 1). The predicted power consumption M during the minute period is calculated.

Thereafter, in step S14, the control unit 40 reduces the reduction target amount from the calculated predicted power consumption M, and obtains the target power value G for the current 30-minute period. In step S15, the control unit 40 determines whether or not the obtained target power value G exceeds the target power maximum value _Gmax . When the target power value G is determined to exceed the target power maximum value G _max, in step S16, the control unit 40, a target power maximum value G _max is the target power value G. Then, the process proceeds to step S17.

On the other hand, in step S15, if the target power value G is determined to be less than the target power maximum value G _max, and, in step S16, after the target power maximum value G _max is the target power value G, the step In S <b> 17, the target power value G is updated by the controller 40 newly storing the obtained target power value G in the RAM 42. And this control flow is complete | finished.

  In the present embodiment, as described above, the control unit 40 calculates the predicted power consumption M in the 30-minute period for each start time of the 30-minute period, and based on the calculated predicted power consumption M, A new target power value G that is equal to or less than the maximum demand power amount and less than the contract power value is obtained and updated. In addition, the control unit 40 sequentially calculates the predicted power consumption M for a period of 30 minutes from the measured actual power consumption P every minute, and the target when the predicted power consumption M is a period of 30 minutes. It is sequentially determined whether or not the power value G is exceeded, and when it is determined that the predicted power consumption M exceeds the target power value G, the power consumption of a predetermined load device 2 among the load devices 2 is limited. Configure to perform demand control. Thereby, by setting the target power value G based on the predicted power consumption M, the demand control is performed in a period of 30 minutes in which the predicted power consumption M is significantly smaller than the contract power value and there is a margin for power. Since the target power value G that is a criterion for determining whether or not to perform the power consumption can be reduced based on the actual power consumption P, the power consumption in the load device 2 is limited even during a period of 30 minutes with sufficient power. (Demand control) can be easily performed. As a result, it is possible to reduce power consumption even in a period when there is a margin in power.

  In the present embodiment, the control unit 40 is configured to individually obtain and update a new target power value G based on the predicted power consumption M at each starting point of a 30-minute period. Since the target power value G can be newly set based on the predicted power consumption M every 30-minute period, the target power value G corresponding to the power consumption trend within the 30-minute period is appropriately set. can do. Thereby, the power consumption in the demand control system 100 can be further reduced.

  Further, in the present embodiment, the control unit 40 measures the actual power consumption P accumulated from the start time point within a period of 30 minutes by sequentially measuring and measuring the actual power consumption P every minute shorter than 30 minutes. From the power consumption amount P, the predicted power consumption amount M in a period of 30 minutes is sequentially calculated every minute using a time series analysis method. In addition, the control unit 40 sequentially determines whether or not the calculated predicted power consumption M exceeds the target power value G in a period of 30 minutes, and the predicted power consumption M sets the target power value G to the target power value G. If it is determined that it exceeds, it is determined that the demand control of the load device 2 is performed, and the demand control for limiting the power consumption of the predetermined load device 2 among the load devices 2 is performed. Thus, by sequentially obtaining the predicted power consumption M in the 30-minute period based on the accumulated actual power consumption P from the start time of the 30-minute period, the start time from the start of the 30-minute period to the end time The actual power consumption P accumulated until (the actual power consumption P within a period of 30 minutes) and the predicted power consumption M to be compared with the target power value G can be more approximated. As a result, demand control can be performed when the predicted power consumption M approximated to the actual power consumption P within the 30-minute period exceeds the target power value G, so that demand control can be performed more accurately. it can.

  In the present embodiment, when there is a load device 2 that is already under demand control and the control unit 40 determines that the predicted power consumption M is equal to or less than the target power value G, the load device It is determined that the demand control of No. 2 is to be released, and the demand control of the load device 2 under demand control is released. As a result, the demand control can be canceled when the predicted power consumption M approximated to the actual power consumption P within the period of 30 minutes is equal to or less than the target power value G, so the demand control is released at an appropriate timing. can do. As a result, it is possible to prevent demand control from being performed more than necessary.

  Further, in the present embodiment, the control unit 40, for each start time of the 30-minute period, the actual power consumption P in the previous 30-minute period, the temperature and sunshine time at the installation location of the load device 2 (weather conditions) ) To calculate the predicted power consumption M for the current 30-minute period, and individually obtain and update a new target power value G based on the calculated predicted power consumption M. Configure. As a result, the predicted power consumption M can be obtained more appropriately by adjusting the actual power consumption P actually consumed until now based on the fluctuation of the temperature at the installation location of the load device 2. In addition, by obtaining the predicted power consumption M based on the temperature fluctuation, the predicted power consumption M in the load device 2 including the refrigerator 2a and the air conditioner 2b that easily increases or decreases according to the temperature fluctuation is obtained. Can be determined more accurately.

  In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, an example in which the target power value G is updated every 30 minutes is shown, but the present invention is not limited to this. For example, the target power value may be updated every hour, or may be configured to be updated every day, every month, or every three months (every season changes). In order to effectively reduce the power consumption, it is preferable to update the target power value at least several times a day. In addition, instead of updating the target power value at regular intervals, the target power value may be changed based on changes in weather conditions at the installation location of the load device such as temperature fluctuations.

  In the above embodiment, the control unit 40 sets the target power value G based on the predicted power consumption M, the “target power setting means” of the present invention, the actual power consumption P, and the target power value G. Based on the “demand control determination means” of the present invention for determining whether or not to perform demand control for limiting power consumption in the load device 2, and when it is determined to limit power consumption in the load device 2, the load device 2, an example that also serves as a “demand control unit” of the present invention that performs demand control for limiting power consumption is shown, but the present invention is not limited to this. In the present invention, the “demand control device” of the present invention may be composed of a plurality of devices as in the case where the target power setting means, the demand control determination means, and the demand control means are provided separately. . At this time, only the demand control means that does not require much processing capacity is provided in the store, and the target power setting means and demand control judgment means that require sufficient processing capacity are processed by the server at the head office that supervises multiple stores. You may provide in a high-capacity apparatus. Further, the demand control device 4 including the control unit 40 having the above three means may be provided in the head office that supervises a plurality of stores without being provided in the store 1.

  Moreover, in the said embodiment, while the control part 40 selects the load apparatus 2 which restrict | limits electric power based on the priority order information stored in RAM42, while the degree of electric power restriction | limiting in the load apparatus 2 (whether it stops completely) However, the present invention is not limited to this. In this invention, you may comprise so that all the load apparatuses may be stopped uniformly, without selecting the load apparatus which restrict | limits electric power. Thereby, it is possible to simplify the control processing of the control unit.

  Moreover, although the said embodiment showed the example which performs demand control with respect to the load apparatus 2 when it is judged that the estimated electric power consumption M exceeds the target electric power value G, this invention is not limited to this. In the present invention, when there is a load device that is already under demand control and when it is determined that the predicted power consumption exceeds the target power value, the load device that performs demand control is further increased, The degree of restriction on the power consumption of the device may be increased.

  Moreover, in the said embodiment, when the control part 40 has the load apparatus 2 which is already demand-controlled, and when it is judged that the estimated electric power consumption M is below the target electric power value G, load apparatus Although the example in which it is determined that the demand control of No. 2 is to be released and all the demand control of the load device 2 under demand control is released has been shown, the present invention is not limited thereto. In the present invention, even if the predicted power consumption becomes equal to or less than the target power value, the demand control may be continued until the end of the period of 30 minutes without releasing the demand control.

  In the above embodiment, the control unit 40 calculates the predicted power consumption M and the target power value G in the current 30-minute period using the actual power consumption P in the previous 30-minute period. Although shown, the present invention is not limited to this. In the present invention, instead of the actual power consumption in the previous 30-minute period, for example, the actual power consumption in the 30-minute period at the same time on the previous day, the actual power consumption accumulated from the same time on the previous day to the present time, etc. Based on the above, the predicted power consumption and the target power value in the current 30-minute period may be calculated. Further, the predicted power consumption amount and the target power value in the current 30-minute period may be calculated using two or more actual power consumption amounts among the above-described actual power consumption amounts.

  Moreover, in the said embodiment, although the example using the information of the temperature and sunshine time of the same time the previous day and the forecast of temperature and sunshine time as weather information was shown, this invention is not limited to this. In the present invention, for example, humidity may be used as weather information. Moreover, as weather information, only the temperature and sunshine duration information at the same time the previous day may be used, or only the temperature and sunshine duration forecasts may be used. Further, as the weather information, information on the temperature and sunshine time at the same time for seven days in the previous week may be used.

  Moreover, although the refrigerator 2a, the air conditioner 2b, the illuminating device 2c, the showcase 2d, and the ventilation fan 2e were illustrated as the load apparatus 2 in the said embodiment, this invention is not limited to this. For example, an incubator for keeping the product warm may be the target of demand control. That is, any device that consumes power can be a target of demand control as a load device. Further, the number of load devices is not limited to the above five. That is, one or more load devices that consume power may be included in the demand control system.

  Moreover, in the said embodiment, although the example which provided the "demand control system" of this invention in the shop 1 was shown, this invention is not limited to this. For example, the “demand control system” of the present invention may be provided in a building, a house, a transportation device, or the like.

  Moreover, although the example which acquired the weather information from the external server 102 was shown in the said embodiment, this invention is not limited to this. In the present invention, the weather information may be acquired from a temperature sensor or a sunshine meter provided in the store.

In the above embodiment, an example was calculated based on the gradient I _t to calculate the predicted consumed electric power amount M _t at time t in the time-series analysis method (the moving average method), the present invention is to Not limited. In the present invention, the predicted power consumption may be obtained using other methods.

  In the above embodiment, for convenience of explanation, the control processing of the control unit 40 has been described using a flow-driven flowchart in which processing is performed in order along the processing flow, but the present invention is not limited to this. In the present invention, the processing of the control unit 40 may be performed by event-driven (event-driven) processing that executes processing in units of events. In this case, it may be performed by a complete event drive type or a combination of event drive and flow drive.

2 Load equipment 4 Demand control device 40 Control unit (target power value setting means, demand control judgment means, demand control means)
100 demand control system

Claims (7)

Target power setting means for setting a target power value that does not exceed the contracted power value based on the predicted power consumption that is predicted to be consumed in the load device where power is consumed;
Demand control determination means for determining whether to perform demand control for limiting power consumption in the load device based on the actual power consumption actually consumed in the load device and the set target power value When,
A demand control device comprising: demand control means for performing the demand control for limiting power consumption in the load device when it is determined to perform the demand control.   The demand control device according to claim 1, wherein the target power setting unit is configured to individually obtain the target power value for each predetermined first period and update the target power value for each first period.   In the first period, the demand control determination means is based on the accumulated actual power consumption from the start time of the first period for each predetermined second period shorter than the first period. The predicted power consumption in the first period is sequentially obtained, and the demand control is determined to be performed when the obtained predicted power consumption exceeds the target power value. The demand control device described.   The demand control determination unit is configured to perform the first period based on the accumulated actual power consumption from the start time of the first period every second period in a state where the demand control is performed. 4. The demand according to claim 3, wherein the demand power consumption is sequentially determined, and the demand control is determined to be released when the calculated predicted power consumption is equal to or less than the target power value. Control device.   The target power setting means calculates the predicted power consumption based on the actual power consumption and the weather conditions at the installation location of the load device, and the target power value based on the calculated predicted power consumption The demand control device according to any one of claims 1 to 4, wherein the demand control device is configured to set the value.   The demand power setting unit according to claim 5, wherein the target power setting unit is configured to obtain the predicted power consumption based at least on the actual power consumption and a change in temperature at a place where the load device is installed. Control device. Load equipment that consumes power;
Target power setting means for setting a target power value that does not exceed the contract power value based on the predicted power consumption that is predicted to be consumed in the load device;
Demand control determination means for determining whether to perform demand control for limiting power consumption in the load device based on the actual power consumption actually consumed in the load device and the set target power value When,
A demand control system comprising: demand control means for performing the demand control for limiting power consumption in the load device when it is determined to perform the demand control.

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