JP6093600B2 - Demand control system, demand control method and program - Google Patents

Description

  The present invention relates to a demand control system for controlling demand power, and a control method and program thereof.

  Demand power means the power consumed by a power consumer in a predetermined time (referred to as a demand time limit, usually 30 minutes), and is based on the demand power that maximizes the power consumption throughout the year. The basic electricity charge for consumers is calculated. Thus, since the basic charge can be reduced by keeping such demand power low, various monitoring systems or control systems have been developed.

  As a demand monitoring system, the amount of power used from the start of the demand time period (actual power amount) to the demand power predicted between the increase in power consumption and the end of the demand time period Compared with the predicted power amount calculated by referring to the data used by power consumers during the demand period (corrected power amount corrected for the theoretical power amount), an alarm is issued if the actual power amount exceeds the corrected power amount Some output (see Patent Document 1).

  In the above demand monitoring system, the hardware load increases due to the simultaneous alarm in the conventional monitoring system, and therefore, in view of the fact that the delay of the alarm is introduced, the electric power consumer is required to limit the number of alarms. The output of the alarm was judged after referring to the past usage data and correcting the theoretical electric energy. The past data refers to the usage data focusing on the day of the week or the data of the same month in the past, and can be used according to the situation of power use that differs for each consumer.

  However, in this type of monitoring system, the customer himself / herself controls power demand in order to reduce demand power. For this reason, the customer must prepare in advance for the response when the alarm is received, and in order to obtain the actual benefit, the customer may become accustomed to the operation of the system, such as learning the power demand control procedure. It was requested. In addition, when a customer continues to reduce demand power for a long period of time, whether the power consumption based on past data on the same month of the previous year is due to normal conditions or is used after receiving an alarm. However, it was not clear whether or not it was reduced, and by referring to the past data, there was a possibility of hindering accurate judgment and delaying the timing of alarm output.

  On the other hand, as a demand power control system, the equipment related to demand power is controlled, the demand power is calculated from the power used, the equipment is stopped so that the target value is not exceeded, Or what controls to reduce energy consumption is developed (refer patent document 2).

JP 2012-5206 A JP 2011-193639 A

  The demand control system disclosed in the above-mentioned Patent Document 2 is configured to predict demand power while referring to power consumption related information. This is a case where the control is started just before the end of the demand period. Therefore, the purpose is to control equipment in a reasonable range by obtaining related information in advance and predicting demand power precisely.

  However, the power consumption related information includes information such as events that increase power consumption (events held in the power consumption area) in addition to forecast information on weather conditions. If the weather conditions differ from the forecast, or if the event information is not entered, referencing these power consumption related information will result in an incorrect control state. There was a possibility that emergency control had to be performed just before the demand period.

  In addition, since the demand control device refers to the power consumption related information as described above, the demand prediction information is calculated from several hours before or several days before the start of control, and the information is notified to the important person in a state where it can be viewed. It is assumed that the equipment is stopped according to the control plan based on the notification. However, in general offices, multiple communication devices and OA devices, etc. are installed, and these facilities are equipped with functions such as an energy saving mode that reduces power consumption when not in use. The power consumption is greatly different between the operation time and the standby time, and it is expected that the demand prediction will be exceeded when communication devices or OA devices are concentrated during the demand time period.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a control system capable of controlling facility equipment at an appropriate timing while sequentially predicting demand power, and control for the same. It is to provide a method and program.

  Thus, the inventors of the present application have completed the present invention as a result of intensive studies. That is, the present invention according to the demand control system includes a target power storage unit that stores a target demand power that is a target value of demand power, a power consumption acquisition unit that periodically acquires power consumption, the target demand power, and the Control means for controlling the power consumption of the equipment based on power consumption, the control means predicting demand power based on the power consumption acquired by the power consumption acquisition means, and the target demand power A set value calculation unit that calculates a predetermined ratio as a set value, an area information storage unit that stores area information in which equipment is divided into a plurality of groups, and the predicted demand power and the set value are compared. At the same time, when it is determined that the demand power exceeds the set value, the group stored in the area information storage unit is stored. An operation control unit that controls the operation while selecting a specific group from the output unit, an output unit that outputs a control signal for control to the equipment in the group selected by the operation control unit, and a control by the output unit And a control area storage unit for storing a group that has been controlled and a group for which control has been completed.

  According to the above configuration, the set value calculation unit calculates the set value based on the target demand power value stored in the target power storage unit, and the equipment is installed when the demand power predicted by the demand prediction unit exceeds the set value. Control on the device is started. Here, the set value is calculated by a predetermined ratio with respect to the target demand power. For example, when the target demand power is 100%, the set value is calculated as an arbitrary ratio in a range of 90% to less than 100%. The demand power by the demand prediction unit is calculated by the integrated value during the demand time period based on the power consumption by the power consumer. And since the power consumption is periodically acquired by the power consumption acquisition means, even when some groups are controlled, the demand power in that situation is predicted, and other groups are controlled. Can be targeted. Therefore, the predicted value of demand power changes according to the situation where the power consumer continues to use the equipment, and the predicted value of the demand power is compared with the set value, so that the set value is exceeded. Even if there is a point in time, control can be performed within a range not exceeding the target demand power.

  Furthermore, the control means stores area information in which the equipment is divided into a plurality of groups, and the equipment is controlled in units of groups forming this area information. The device can be a control target, and the effect of reducing power consumption can be remarkably reflected. The already controlled group or the group under control is stored in the control area storage unit, and the operation control unit does not repeatedly select the same group as the control area continuously. It is possible to adjust the control area so that the two are not selected as the control target. Therefore, it is possible to avoid the concentration of control with respect to a specific group and to make the control target almost evenly with respect to all the groups. At this time, by providing a timer means for maintaining the control signal output from the output unit for a predetermined time, it becomes possible to continuously control the equipment of the group to be controlled for a predetermined time, while calculating the control continuation time. Demand power can be predicted. If the set time of the timer can be corrected, the control time can be extended. In addition, when controlling equipment, there are cases where energy consumption is reduced in addition to stopping equipment, and when controlling air-conditioning equipment, one of them can be selected according to its function. it can.

  The inventor has invented a demand control method using the demand control system. That is, the demand control method is acquired by a set value calculating step for calculating a predetermined ratio with respect to the input target demand power as a set value, a power value acquiring step for periodically acquiring power consumption, and the power value acquiring step. A predicted demand power calculating step for calculating predicted demand power based on the calculated power, a comparing step for comparing the set value with the predicted demand power, and whether the predicted demand power exceeds the set value by the comparing step. A determination step for determining whether or not, a control area selection step for selecting a group to be controlled among the groups based on area information obtained by dividing the equipment into a plurality of groups, and a group selected by the control area selection step Control signal output step for outputting control signals for control to the equipment in the system Is characterized in that comprises a.

  According to the above configuration, the power supplied to the entire equipment is periodically acquired, and the predicted demand power is calculated based on this power value. Therefore, it is optimal based on the power value that changes during the demand period. Control can be started at any time. Here, the term “periodic” means an appropriate time interval and can be arbitrarily set. For example, by setting the interval to 1 minute, a change in the power value supplied can be grasped almost in real time. Although it is possible to calculate (correct) the predicted demand power from the increase / decrease value of the power value, it is preferable to integrate power consumption during the demand period in order to calculate the predicted demand power with certainty.

  Moreover, although the group which should be controlled is selected by the control area selection step, this group is not limited to a single case, and a plurality of groups may be selected. That is, since the power value is periodically acquired and the predicted demand power is calculated each time, the control is continued even when the first group is selected and the control is started. If the predicted demand power is calculated even during the period and the value exceeds the set value, the control is started by selecting the second group and the third group. Therefore, it is preferable to include a step of storing the controlled group and the completed group so that the groups to be controlled do not overlap or the same group is continuously controlled. In this case, by selecting a control area based on area information in which a rank is previously assigned to each group, the entire plurality of groups can be equally controlled. Further, in the control signal output step, the control signal is output only for a predetermined time by the timer, thereby avoiding excessive control of the equipment (such as a long stop state). That is, for example, by setting the continuous control for 3 minutes as a predetermined time, when the control is no longer necessary, the control is automatically canceled after 3 minutes, and the use restriction of the equipment is extended for a long time. It is possible not to reach the limit. The predetermined time may be corrected when continuous control is required.

  According to the present invention, the power supplied to the equipment is periodically acquired, and the demand power is predicted each time. Therefore, the equipment can be controlled at an accurate timing while sequentially predicting the demand power. it can. In this case, since the predicted demand power is a comparison target with a set value of a predetermined ratio with respect to the target demand power, the power consumption can be reduced before reaching the target demand power, and the predicted demand power is It is possible to avoid exceeding the target demand power. In addition, since the equipment is controlled in units of areas divided into multiple groups, when the control is started, all the equipment in the area is controlled and the power consumption is significantly reduced. It is what makes it possible. Furthermore, by storing these area information, it is possible to avoid the same group from being continuously controlled, and by making each group a controlled object sequentially, an almost uniform control environment can be obtained as a whole. Can be obtained. This means that if only air-conditioning equipment is used as equipment, the area will be different in order even if the occupancy rate of power consumption by the air-conditioning equipment increases during the summer heat or the winter cold. Since the air conditioning equipment is the control target, the effect of preventing an extreme temperature change by the control is also achieved.

It is a block diagram which shows the outline of embodiment concerning a demand control system. It is a flowchart of the process which shows 1st Embodiment concerning a control method. It is a flowchart of the process which shows 2nd Embodiment concerning a control method. It is a flowchart of the process which shows 3rd Embodiment which concerns on a control method. It is a figure which shows the driving | running state of the installation apparatus controlled by implementation of a control method.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Demand control system]
FIG. 1 is a diagram showing an overall configuration of an embodiment of the invention relating to a demand control system. In the embodiment of the invention related to the demand control system, the power consumption measured by the power meter 10 is obtained and the equipment 30 is controlled by the controller 20 as shown in FIG. The controller 20 includes a control means 40, and the control means 40 includes a processing means 40a and a storage means 40b. The processing unit 40a includes a CPU, a RAM, a ROM, and the like, and can process various types of information. The storage unit 40b has a function of storing various types of information using an HDD, a memory, or the like. Therefore, the process for controlling the equipment 30 is performed based on the information regarding the power consumption obtained from the wattmeter 10, and the control signal for the equipment 30 is output.

  That is, the controller 20 is provided with power value acquisition means 21 for acquiring the power consumption measured by the wattmeter 10. Specifically, a pulse signal generated from the wattmeter 10 is received by a pulse sensor installed in the wattmeter 10, and power consumption is calculated from the pulse signal. The controller 20 is provided with a target power storage unit 22 that functions as target power storage means, and stores a target demand power value (target value). This target value can be set by the input means 50 and is arbitrarily set according to the power consumption trend of the power consumer.

  Of the control means 40 provided in the controller 20, the processing means 40 a is provided with a demand prediction means 41, which can predict demand power based on the power consumption acquired by the power value acquisition means 21. is there. This prediction of demand power is to calculate an integrated value when it is assumed that the acquired power value continues during the demand time limit (usually 30 minutes). Further, the processing means 40 a is provided with a set value calculation unit 42, and the set value is calculated from the target value stored in the target power storage unit 22. The set value is a value obtained by multiplying a predetermined ratio with respect to the target demand power, and the result obtained by multiplying an arbitrary ratio in the range of 90% or more and less than 100% when the target demand power is 100%. It is said. Although early control is started by reducing the set value, the control state is frequently repeated, or the control state of the equipment is prolonged, so the optimum ratio obtained empirically (for example, 95%) It is set to the value multiplied by. Then, the operation control unit 43 compares the calculation result by the demand prediction unit 41 with the set value, and an operation start signal is output to the output unit according to the result.

  By the way, the equipment 30 to be controlled is conceptually divided into a plurality of groups. For example, when the entire building is managed, the grouping may be based on a room, based on a floor, or based on an installation location. What is necessary is just to divide a group according to arbitrary criteria according to the installation situation of equipment. Moreover, as equipment in the group, only specific equipment (for example, air-conditioning equipment) may be targeted, or all power demanding equipment may be targeted. In the present embodiment, an example in which it is divided into five groups (A group 30a to E group 30e) for convenience is illustrated. Moreover, each group 30a-30e is an aggregate | assembly of a some installation apparatus, for example, the A group 30a groups three installation apparatus 31a, 32a, 33a into the same group. In addition, although the figure has illustrated three installation apparatuses in each of each group 30a-30e, the number can be changed suitably.

  In view of this, in the storage means 40b provided in the control means 40, various information relating to the groups 30a to 30e into which the above-mentioned equipment is divided is stored. That is, the storage means 40b is provided with an area information storage unit 45, a control area storage unit 46, and a load capacity storage unit 47. The area information storage unit 45 stores information on each facility device divided into individual groups 30 a to 30 e and the installation location thereof, and the control area storage unit 46 is controlled by a control signal from the output unit 44. And the information of the group for which the control has been completed is stored, and the load capacity storage unit 47 further calculates the load capacity (expected power consumption) in the group unit of the equipment classified into each group. It is something to remember. In addition, the area information stored in the area information storage unit 45 may include a ranking given to the groups 30a to 30e divided into a plurality of groups.

  The operation control unit 43 provided in the processing unit 40a of the control unit 40 manages the output unit 44 as described above. Specifically, the demand power predicted by the demand prediction unit 41 and the set value calculated by the set value calculation unit 42 are compared, and it is determined whether the predicted demand power exceeds the set value. When the predicted demand power exceeds the set value, the group to be controlled is selected from the groups 30a to 30e, and the output unit 44 is instructed to output a control signal. . The output unit 44 outputs a control signal to the selected group based on a command from the operation control unit 43. As the control signal, for example, there is a signal for stopping the operation during a predetermined period. In addition, when the equipment to be controlled has a function that enables variable control (inverter control) of the power consumption of the equipment, the power consumption is not stopped for such equipment. It is also possible to output a control signal that lowers.

  Various determination methods may be employed for selecting a group to be controlled. For example, there can be a method of selecting sequentially from the one with the lowest power consumption, or a method of selecting sequentially from the one with the highest power consumption. Although it may be determined by any method, the group is stored in advance in the area information storage unit 45 as area information. In addition, when the area information includes the rank of each group, it is possible to employ a method in which a rank is assigned to each group in advance and the selection is sequentially performed according to the rank. In this case, all the groups can be controlled (circulation control) by appropriately storing the controlled group and the group for which control has been completed in the control area storage unit 46 (correcting the stored information).

  Further, in the present embodiment, the storage means 40b includes a load capacity storage unit 47. As described above, the load capacity storage unit 47 stores the load capacity in group units of the equipment divided into each group, so that the control target group selected by the operation control unit 43 is The amount of power reduction due to control can be calculated before the start of control. And based on this information, it is also possible to make the operation control unit 43 determine whether or not control is required for another group after predicting demand power after the start of control.

  The storage unit 40b is provided with another information storage unit 48 for storing other information, and can store the predicted demand power calculated by the demand prediction unit 41. By storing the predicted demand power in the other information storage unit 48, it is possible to use it for comparison with the set value and to statistically record the transition of the predicted demand power. Further, although the target power storage unit 22 is provided separately from the control means 40, the target value stored by the target power storage unit 22 may be stored in the other information storage unit 48.

  Furthermore, in this embodiment, the control means 40 is provided with a timer 49. It is assumed that a predetermined time can be set in advance in the timer 49. When the output of the control signal by the output unit 44 is started, the timer 49 is activated, and the timer information is output to the output unit 44, and the predetermined time The control signal output can be stopped after the passage. Accordingly, the equipment controlled by the output of the control signal from the output unit 44 operates so that the control state continues for a predetermined time of the timer 49 and the control is automatically terminated when the predetermined time elapses. It will be a thing. The timer 49 may be configured to be resettable by the operation control unit 43. Thus, when the control state is to be continued, the operation control unit 43 resets the timer 49 and the predetermined time from the reset time. It is also possible to continue the control state until the time has elapsed. When the timer 49 is not provided, the operation control unit 43 may be configured to manage the start and end of control. In this case, the operation control unit 43 also calculates the control time based on the predicted demand power, and the control becomes complicated. In the present embodiment, the predetermined time is managed by the timer 49. This simplifies the control environment.

  Since this embodiment is configured as described above, demand power is predicted based on the power value obtained from the power meter 10, and the demand power is compared with a set value (corresponding to a predetermined ratio with respect to the target demand power). However, when the predicted demand power exceeds the set value, it is possible to control the operation state of the equipment in the plurality of groups 30a-30e divided into groups. Since the operation is continuously controlled during the time set by the timer 49, the demand power at that time can be reduced. In addition, among the groups 30a to 30e to be controlled, those that are controlled and those that have been controlled are stored in the storage unit 45, and a control target group is selected based on the stored data. Thus, it is possible to avoid a specific group from being repeatedly controlled, and all the groups can be sequentially controlled almost equally.

  Here, the power value measured by the wattmeter 10 is periodically acquired, but as the periodic acquisition, a very short period (for example, one minute interval) is scheduled, The time controlled by the timer 49 can also be scheduled to be relatively short (for example, 3 minutes). In this case, by obtaining the power value measured by the wattmeter 10 at 1 minute intervals, the power value after the start of control on the equipment can be obtained, and by predicting the demand power in that state, Furthermore, it is possible to determine whether or not control is possible for other equipment. Further, by setting the control time to 3 minutes, it is possible to determine whether or not the timer 49 can be reset within 2 minutes after the next demand power is predicted. Furthermore, since the control time is set to 3 minutes, even if the temporary (instantaneous) power value exceeds the set value, it is possible to avoid the result of controlling unnecessary (excessive) equipment. It becomes. In other words, when demand power increases momentarily due to intensive operation of communication equipment or OA equipment, the demand power is reduced while avoiding unnecessary power saving by reducing the temporary power consumption. Can be realized.

  In addition, although various things can be mentioned as equipment to be controlled, it is preferable to target air conditioning equipment (outdoor unit for air conditioning). When other equipment (for example, lighting equipment or office equipment) is to be controlled, there is a possibility that it may interfere with work. On the other hand, the effect of reducing power consumption is relatively small, and the demand power is set to the set value. Immediate effects at the time of lowering cannot be expected. On the other hand, in the case of air conditioning equipment, the effect of reducing power consumption due to the start of control is remarkably high, and further, the possibility of causing troubles in business even by operation control for several minutes is extremely low. In particular, it is divided into a plurality of groups, and the operation is controlled by the group as a unit, so that the group whose operation is temporarily controlled restarts after a few minutes, so almost feel the change in air conditioning temperature. The power consumption can be reduced without any problems.

  FIG. 1 shows a configuration including an alarm unit 60. When the output unit 44 outputs a control signal for starting control to any of the groups 30a to 30e, However, it is possible to recognize that the electric power consumer is under control by configuring so as to output the signal. Such an alarm means 60 is not essential, but it is easily detected that the cause of the operation being stopped or the power consumption being reduced by the alarm by the alarm means 60 is the control state of the equipment. It becomes possible to do.

[Demand control method]
Next, a control method based on the demand control system will be described. Since this control method is implemented by the controller 20 (FIG. 1) of the demand control system, an embodiment of the control method will be described according to the processing method.

(First embodiment)
FIG. 2 is a flowchart showing a processing method by the controller when the timer is not used. As shown in this figure, in order to reduce demand power, first, target demand power is set. This target demand power can be arbitrarily set by a power consumer, and this is input (S101). In order to set a predetermined ratio (for example, 95%) as a set value for this input value, a set value is calculated (set value calculating step, S103). The target demand power and the set value can be stored respectively (S102, S104). The storage of the target demand power is for display when the power consumer confirms the input value, and the storage of the setting value is for reference in later processing. This is the stage before the demand control process starts.

  The demand control is started every elapse of a predetermined time (for example, 1 minute) (S201). The input of the power value is started after 1 minute has elapsed from the start of the process (power value acquisition step, S202), and the input of the power value is received every time a predetermined time (1 minute) elapses. When the power value is input, the predicted demand power is calculated based on the power value (predicted demand power calculating step, S203). The predicted demand power is calculated as a numerical value obtained by converting the power consumption at the time of measurement into a demand time limit. That is, when the demand time limit is 30 minutes, the total is calculated when it is assumed that the power consumption continues for 30 minutes. The calculated predicted demand power is compared with the set value (comparison step, S204), and when it is determined that the predicted demand power exceeds the set value (determination step, S205), the control of the equipment is started. For the control of the equipment, a group to be controlled is selected from a plurality of groups divided in advance (control area selection step, S206), and a control signal is output to the equipment of the group (control signal) Output step, S207).

  By outputting the control signal, the operation of the target equipment in the control target group is controlled. When a predetermined time elapses from the start time of the process (S201), the power value in a state where the equipment is controlled is acquired (S202), and the predicted demand power is calculated (S203). The calculated predicted demand power is again compared with the set value (S204), and an excess state is determined (S205). Even in this case, when the predicted demand power exceeds the set value, a control signal is further output to the equipment of different groups (S206, S207).

  In addition, when control with respect to an installation apparatus is started, the process which stops control according to predetermined conditions should just be performed. For example, if the predicted demand power is determined to be less than the set value in the comparison step (S204) and the determination step (S205) between the predicted demand power and the measured value, it is determined whether or not there is a group under control. (S301) If there is a group under control, the load capacity (power consumption) of the group is detected (see information stored in the load capacity storage unit), or there are a plurality of groups. If so, the load capacities of all the groups are added together (S302), the demand power after the control of the group is stopped is compared with the set value (S303), and the demand power is less than the set value. The control of the group should be stopped (S304).

  Here, the selection of the group to be controlled (S206) is stored as information for each area in which the equipment is divided into a plurality of groups, and the area information is further given a rank according to the rank. It becomes possible to select a group regularly. Further, by storing the information on the controlled area and the information on the area for which the control has been completed, it is possible to select the area of the next order while referring to the order when selecting the group to be controlled. And by storing beforehand the load capacity (power consumption) of the whole group about the equipment in each group, it becomes easy to calculate the electric energy at the time of stopping control about the group under control.

(Second Embodiment)
Next, a processing method when using a timer will be described. FIG. 3 is a flowchart thereof. The initial setting is omitted because it is the same as described above. Note that the control of the equipment is terminated by the timer after a predetermined time has elapsed, and therefore processing for stopping the output of the control signal is not included. That is, the control is started by operating a timer for the control for a specific group, and the control is ended when a predetermined time (for example, 3 minutes) elapses.

  Hereinafter, it will be described in detail with reference to FIG. As shown in the drawing, first, whenever an appropriate interval (for example, 1 minute) elapses (S401), a power value is acquired (S402), and a predicted demand power is calculated (S403). Then, the predicted demand power and the set value are compared (S404), and it is determined whether the predicted demand power exceeds the set value (S405). In this determination step, when the predicted demand power is less than the set value, there is no need for control. Therefore, the power value is obtained by the next elapsed time (S401) (S402) and the comparison step (S404) S405) is repeated. Also, even if there is already a group under control, the predicted demand power does not exceed the set value due to the control of the group, so it is not necessary to select a new control area. The control during the timer set time is continued only for the group.

  On the other hand, if it is determined in the determination step (S405) that the predicted demand power exceeds the set value, it is determined whether or not there is a group whose control was started immediately before (one minute before) (S406). If there is no group that started control immediately before (one minute before), it is clear that the set value will be exceeded in the determination step (S405) even if there is a group currently under control. The order group is selected and control is started (S407).

  If there is a group for which control has been started immediately before (one minute before), the predicted demand power in the state in which the next rank group is controlled is compared with the set value, and control is started for the next rank group. It is determined whether or not to perform (S408 to S411). That is, when there is a group that has started control immediately before (one minute before), the next rank group is selected (S408), and the load capacity (power consumption) of the group is calculated or read from the storage unit. (S409), load capacities of all groups under control are calculated (demand predicted power calculation step, S410). And when it is judged that the demand power (demand prediction power) which predicted the state after starting control about the next rank group exceeds a setting value (S411), control of the next rank group is started. (S407), if not exceeded, the determination is again made when the next power value is acquired.

  In the case of such a control method, the control state is continued until a timer set time (for example, 3 minutes) elapses for a group that has started control once, by acquiring a power value during that time. A plurality of groups can be controlled simultaneously. In addition, when power consumption is on the rise, it is necessary to significantly reduce power consumption. Therefore, after starting control, control for the next rank group is performed based on the load capacity of the group selected as the next rank. Can be started, and the next rank group can be controlled in advance without waiting for the next power value acquisition (S402) and the determination step (S405). In addition, about the group which started control, since control will be stopped sequentially by timer setting time progress, it will be judged whether the necessity of control is determined, referring a power value regularly (every 1 minute). Become.

(Third embodiment)
Next, a control method when the timer set time can be corrected will be described. FIG. 4 shows the flowchart. As shown in this figure, after obtaining a power value for every elapse of a predetermined time (for example, 1 minute) and calculating a predicted demand power, the predicted demand power value is compared with a set value to determine an excess state. Each step (S501 to S505) is the same as that in the second embodiment.

  Therefore, in this embodiment, when it is determined in the determination step (S505) that the predicted demand power exceeds the set value, first, it is determined whether or not there is a group that has started control immediately before (one minute before). (S506). Here, when it is determined that there is a group that has started control immediately before (one minute before), such a situation means that even if the equipment of the group selected immediately before is controlled, the predicted demand power is still It means that the set value has been exceeded. Therefore, in this case, the timer that has already progressed is corrected to the initial value, and the original set time (3 minutes) is measured. Further, since it is necessary to start control for another group, the next group is selected (S508), and control of the group is started (S509).

  Moreover, even if it is determined that there is no such group as a result of determining the presence of the group that started control immediately before (one minute before) (S506), the situation is that There can be a started group but not a previous start, or no controlled group at all. In any case, since the predicted demand power exceeds the set value in the determination step (S505), it is necessary to select a specific group and start control. Therefore, even in such a case, a control target group is selected (S508), and control of the group is started (S509).

  In the present embodiment, the load capacity is further calculated for the next rank group for which control has been started, or the information of the storage unit is read to calculate the load capacity by the control of all groups after the next rank group is controlled (S511). ), The predicted demand power in this state is compared with the set value (S512), and if the capacity to be controlled is insufficient, the next-ranked group is selected (S513), and control is also started for the group. Yes (S514). In controlling the next rank group and the next rank group, the timer is set to an initial value, that is, control of the original set time (3 minutes) is started.

  Therefore, in the present embodiment, when the predicted demand power exceeds the set value for the first time, the control of the first rank (next rank in the figure) group is started (S509). In this state, if control of the second order (second order in the figure) is necessary, control of the group of the order is also started (S514). After starting the control for the first and second order groups, the predicted demand power and the set value are again compared and determined (S504, S505) by the next power value acquisition (S502). If there is a shortage of groups, the timer is corrected to the initial value for the first and second rank groups that have already started control, and control of the third rank (next rank) group is started (S509), Further, depending on the case, the control can be started for the groups of the next rank (fourth rank) (S514). According to such a control method, when the predicted demand power greatly exceeds the set value, the power consumption can be rapidly reduced. In only two minutes, a maximum of four groups can be controlled simultaneously. This can cope with a case where the power consumption suddenly increases.

  Even in the above control method, when the predicted demand power is less than the set value in the state where the first rank group is controlled, the determination based on the power value obtained by the next power value acquisition (S502) (S505). When the predicted demand power exceeds the set value in the determination step (S505), the next rank group is selected (S508), and control of the group is started (S509). If the predicted demand power is less than the set value in step (S505), control for other groups is not performed and the next power value acquisition (S502) is waited.

(Modification)
Next, a modification of the third embodiment will be described. Since the basic processing procedure is the same as that of the third embodiment described above, it will be described with reference to FIG. In this modification, instead of the step (S506) of determining the presence of the group that started control immediately before (one minute before), the step of determining the presence of the group under control is used. By adopting such a control method, it is possible to continue the control for the group under control and set another group as the control target. That is, if another group is to be controlled before the timer setting time (3 minutes) of the already controlled group elapses, the timer of the currently controlled group is initialized once. The value is corrected to 3 minutes (S507), and the control time is extended for the group under control, and in addition, other groups can be controlled.

  According to the above modification, when the predicted demand power exceeds the set value due to the comparison / determination (S504, S505) when the next power value is acquired (S502), the control for the group under control is maintained. In an extreme case, all the groups can be brought into the control state. In addition, since it does not take time to reach this situation, it has immediate effect against a sudden increase in power consumption. In this case, facility equipment belonging to the group under control does not stop operation, but puts it in a control state that reduces power consumption, which inconveniences power consumers who use the facility equipment. There will be no.

(Other variations)
In the description of each control method described above, a step (control area storage step) for storing a controlled group or a group for which control has been completed is not specified, but a control signal output step (S207, S407, S509) is not specified. , S514), when the control is started, a procedure for storing the group at the same time may be inserted, or the execution of the control stop step (S304) or the set time of the timer elapses. When control is stopped, a procedure for storing the group at the same time may be inserted. By going through these storage steps, the control state of the group is stored, and in the control area selection step (S206, S408, S508, S513) for selecting the group (or next rank group) to be controlled. Thus, it is possible to perform processing so as to sequentially select a group that has not yet been controlled or a group that has been controlled in an earlier order.

[Control status of equipment]
Next, the control state when the equipment is controlled by the control method described above will be described. FIG. 5 is a diagram showing the control state of each group over time. In both FIGS. 5A and 5B, the horizontal axis indicates the elapsed time (minutes), and the operation (control) state of the equipment belonging to each group is indicated by a bar graph. Therefore, when the equipment belonging to each group is in the operating state, the bar graph is extended horizontally, and in the control state (operation stopped state or power consumption reduced state), the graph is interrupted. . In addition, the order of selection of the group is assumed to be selected in the order of the B group, the C group, the D group, and the E group hereinafter, with the A group being the first order.

  Therefore, first, when only a single group is controlled and the predicted demand power becomes less than the set value, as shown in FIG. The operation is in a controlled state. In this figure, the control time is set to 3 minutes, but this time can be set by setting the set time of the timer or the control end time by the operation control unit to 3 minutes. By regularly allocating the load capacity of the equipment classified into each group, the above-described periodic operation control state is possible.

  Next, when a single group is controlled, under a situation where the predicted demand power exceeds the set value, as shown in FIG. 5B, a plurality of groups are in the control state at the same time. There is a case. For example, as shown in the figure, the control of the A group is started after 3 minutes, but if the predicted demand power exceeds the set value even after 1 minute, the control is started for the B group. After that, since it was determined that further group selection was unnecessary, the A group and the B group are continuously in the control state. For example, when the control is terminated after 3 minutes by the timer, the predicted demand power is again increased. If the set value is exceeded, the control is started from the next group C. At this time, if a significant reduction in power consumption is required, the D group is selected next to the C group, and then the E group is selected, and control is started.

  In any of the control cases shown above, a plurality of groups are sequentially selected during a demand time period (for example, 30 minutes), and each of them becomes a control target. Each group can be set as a control target while being circulated almost uniformly without being biased.

  The embodiments of the present invention are as described above, but these embodiments show examples of the invention and are not intended to limit the present invention. In particular, there is a simplified portion for convenience of explanation, such as a group of equipment to be controlled, but it can be changed as appropriate. Moreover, although the processing procedure by the controller was shown as an embodiment related to the control method, the controller has the same function as a computer, and the processing in this controller is stored in the controller in the form of a program. Each process can be performed by the controller reading and executing the program.

DESCRIPTION OF SYMBOLS 10 Power meter 20 Controller 21 Power value acquisition means 22 Target electric power storage part 30 Equipment 30a A group 30b B group 30c C group 30d D group 30e E group 31a, 32a, 33a A group equipment 40 Control means 40a Processing means 40b Storage unit 41 Demand prediction unit 42 Set value calculation unit 43 Operation control unit 44 Output unit 45 Area information storage unit 46 Control area storage unit 47 Load capacity storage unit 48 Other information storage unit 49 Timer 50 Input unit 60 Alarm unit

Claims (9)

Target power storage means for storing target demand power, which is a target value of demand power, power consumption acquisition means for periodically acquiring power consumption, and control of power consumption of facility equipment based on the target demand power and the power consumption Control means for
The control unit includes a demand prediction unit that predicts demand power based on the power consumption acquired by the power consumption acquisition unit, a setting value calculation unit that calculates a predetermined ratio with respect to the target demand power, and a facility device. When the area information storage unit that stores area information divided into a plurality of groups and the predicted demand power and the set value are compared, and the demand power is determined to exceed the set value, An operation control unit that controls the operation while selecting a specific group from the groups stored in the area information storage unit, and outputs a control signal for control to the equipment in the group selected by the operation control unit an output unit, and a timer for maintaining the control signal output by the output unit a predetermined time, Oyo group is controlled by the output unit And a control area storing unit for storing the group that terminates the control, the timer, the measures longer than regular acquisition interval of the power consumption acquired by the power consumption acquiring unit, timer information by said timer Is output to the output unit and stops the control signal when a predetermined time elapses of the timer, and the operation control unit determines whether or not the timer measurement time can be reset. Demand control system. The demand control system according to claim 1 , wherein the measurement time by the timer is three times the periodic power consumption acquisition interval acquired by the power consumption acquisition means . The demand control system according to claim 2 , wherein the periodic power consumption acquisition interval acquired by the power consumption acquisition unit is 1 second, and the measurement time by the timer is 3 seconds .   The control means includes a load capacity storage unit that stores a load capacity for each group, and the demand prediction unit controls the group based on the load capacity of the group before control stored in the load capacity storage unit. 4. The demand control according to claim 1, wherein the demand predicted power after the calculation is also calculated, and the operation control unit also compares the demand predicted power with the set value. system.   The demand control system according to any one of claims 1 to 4, wherein the equipment is an air conditioning equipment. A set value calculation step for calculating a predetermined ratio with respect to the input target demand power as a set value, a power value acquisition step for periodically acquiring power consumption, and a predicted demand power based on the power acquired by the power value acquisition step A predicted demand power calculating step for calculating the setting value, a comparing step for comparing the set value with the predicted demand power, and a determining step for determining whether the predicted demand power exceeds the set value by the comparing step; A control area selection step for selecting a group to be controlled from the group based on area information divided into a plurality of groups, and control for the equipment in the group selected by the control area selection step look including a control signal output step of outputting a control signal for the control signal output stearate The control signal is maintained by a timer that measures a time longer than the periodic power consumption income interval acquired by the power value acquisition step, and the power value acquisition step during the measurement time of the timer A demand control method , wherein whether or not the timer can be reset is determined based on the predicted demand power calculation step and the comparison step .   Further, a control area storing step for storing the group controlled by the control signal output step and the group for which the control has been completed, and after the control start of the group based on the load capacity of the group before the control included in the area information The demand control method according to claim 6, further comprising a demand predicted power calculation step of calculating demand predicted power.   The demand control method according to claim 7, wherein the area information includes a predetermined order, and the control area selection step changes according to the order based on the area information.   The program for making the controller for controlling the power consumption of an installation apparatus in a demand control system perform each step of the demand control method in any one of Claim 6 thru | or 8.

Images