JP5054590B2 - Demand control system and demand control method - Google Patents

Description

  The present invention relates to a demand control system and a demand control method for performing demand control in a facility including electrical equipment including a large number of lighting devices.

  In general, in an electricity bill system for business use (high-voltage power A, high-voltage power B, business power), an actual quantity system is adopted in which contract power is determined based on power actually used. The power value (referred to as the demand value) that determines the contract power uses the average power for each demand time period (in units of 30 minutes) that is a fixed time (that is, a value obtained by converting the integrated power amount for 30 minutes into the power amount for unit time). . The maximum demand value is defined as the maximum demand power. The contract power for each month in the period of December after the start date of the charge application is the maximum demand power for that month and the maximum demand power from the start date of the charge application to the previous month. Whichever is greater. Moreover, the basic rate of electricity charges increases as the contract power increases. Under such circumstances, various demand control apparatuses for performing demand control for adjusting the maximum demand power (because it is a peak value of the demand value, hereinafter referred to as a demand peak value) so as not to exceed the contract power have been proposed. .

  By the way, in a facility that requires this type of demand control device, many techniques for suppressing the demand peak value by adjusting the power supplied to the air conditioner are employed (for example, see Patent Documents 1 and 2). . When demand control is performed by an air conditioner, a technique that either stops the air conditioner, operates only by blowing, or suppresses power consumption of the compressor is often employed.

For example, Patent Document 1 employs a technique for performing demand control by using a plurality of air conditioners and sequentially stopping the air conditioners according to the power used. In addition, multiple levels of alarm levels are set, and when the electric energy reaches each alarm level during the demand time period, the air conditioner is stopped for a time corresponding to the alarm level.
JP 2002-139238 A JP 2003-304637 A

  By the way, in the conventional technique which performs demand control by adjusting the power supplied to the air conditioner, there is a possibility that in the summer, when the air conditioner stops, the room temperature rises and the occupants are uncomfortable. Also, in places where freezing and refrigeration equipment is installed, such as at supermarkets and department store food departments, the thermal load on the freezing and refrigeration equipment may increase if the air conditioning equipment is stopped and the temperature rises.

  When the air conditioner is temporarily stopped and the room temperature rises, the power consumption of the air conditioner or the refrigerator / freezer is temporarily increased immediately after the operation of the air conditioner is restarted. May be higher.

  Furthermore, within the period of the demand time limit of 30 minutes, usually, an alarm lock time of about 15 to 20 minutes is provided from the start of the demand time period, and demand control is prohibited during the alarm lock time. The power supplied to the air conditioner is controlled only within the time excluding the alarm lock time. Therefore, when the amount of power close to the contract power is reached when the alarm lock time has elapsed, the power consumption may not be sufficiently suppressed and the demand value may exceed the contract power.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a demand control system and a demand control method for suppressing a change in temperature and reducing a demand peak value.

According to the first aspect of the present invention, in a facility having a large number of lighting devices installed together with other electric devices, the demand peak value, which is the maximum value of the demand value obtained for each demand time period, does not exceed the contract power. A demand control system that performs control, including a watt hour meter that detects the power supplied to the electrical equipment in the facility, and a demand peak value based on a change in the accumulated power value within the demand time period determined from the power detected by the watt hour meter The demand forecasting unit that predicts whether or not the power exceeds the contracted power in advance and the instantaneous power value consumed by the lighting equipment when the demand forecasting unit predicts that the demand peak value exceeds the contracted power a control unit for suppressing demand control, and a brightness sensor for detecting the brightness of outdoor control unit of the demand time period from the start of demand control final Gradually reduce the power consumed by the lighting equipment over time, and at least for some lighting equipment, obtain the output of the brightness sensor. The reduction speed is increased, and the evacuated power value is reached at the end of the demand period .

According to a second aspect of the present invention, in the first aspect of the invention , the control unit does not cancel the demand control that suppresses the power consumed by the lighting device for a certain time after the demand time period when the demand control is started. And

According to a third aspect of the present invention, in the first or second aspect of the present invention , the electrical equipment excluding the lighting equipment includes an air conditioning equipment, and the control unit is a demand peak value only by demand control for suppressing power consumed by the lighting equipment. When it is predicted that the power consumption exceeds the contract power, the power consumption of the air conditioner is also suppressed.

According to the invention of claim 4 , the demand peak value which is the maximum value of the demand value obtained for each demand time limit does not exceed the contract power in a facility including an air conditioner and a large number of lighting devices installed together with other electric devices. A demand control system that performs demand control, such as a watt hour meter that detects an instantaneous power value supplied to electrical equipment in a facility, and an integrated power value within a demand time period that is obtained from the power detected by the watt hour meter. A demand prediction unit that predicts in advance whether or not the demand peak value exceeds the contract power from the change, and at least one of the lighting device and the air conditioner when the demand prediction unit predicts that the demand peak value exceeds the contract power a control unit for suppressing demand control the instantaneous power value to be consumed in the save power values defined, the brightness sensor and outdoor for detecting the brightness of outdoor And a condition input unit giving external conditions related to the illuminance and the temperature in the facility comprises a temperature sensor for detecting the air temperature to the control unit, the control unit defines the external conditions given from the condition input section Rules It is determined whether the demand control of the lighting equipment or the air conditioning equipment is mainly performed, and the power consumed by at least one of the lighting equipment and the air conditioning equipment is suppressed according to the judgment result . During the period from the start to the end of the demand time period, the power consumed over time is gradually reduced, and for at least some lighting devices, the output of the brightness sensor is acquired, and the evacuated power value is lowered as the outdoors gets brighter. At the same time, the power reduction rate is increased, and the evacuated power value is reached at the end of the demand time period .

According to a fifth aspect of the present invention, in a facility having a large number of lighting devices installed together with other electrical devices, the demand peak value, which is the maximum value of the demand value obtained for each demand time period, does not exceed the contract power. This is a demand control method that controls the demand peak value from the change in the integrated power value within the demand time period using the instantaneous power value obtained from the watt hour meter that detects the power supplied to the electrical equipment in the facility. whether the predicted beforehand than, have rows suppress demand control to save power value defining the instantaneous power value lighting device consumes when demand peak value is expected to exceed the contract power, demand control For the period from the start to the end of the demand time period, gradually reduce the power consumed by the lighting equipment over time, and at least some lighting equipment It takes the output of the brightness sensor for detecting the brightness of outdoor faster speed to reduce power with lower the higher the outdoor bright retraction power value, and characterized in that to reach the evacuation power value at the end of the demand time period To do.

According to the first and fifth aspects of the invention, since the demand control is performed by suppressing the instantaneous power value consumed by the lighting device to the predetermined evacuated power value, the air temperature when the demand control is performed by the air conditioning device. It becomes possible to reduce the demand peak value without the change of. In commercial facilities such as supermarkets, department stores, and shopping malls, the power consumption of lighting equipment often exceeds that of air conditioning equipment. In comparison, the power consumption is highly suppressed, and since there is no temperature change, demand control can be performed so as not to make the facility user feel uncomfortable. Moreover, although demand control by lighting equipment is accompanied by a temporary decrease in illuminance, if the degree of decrease in illuminance is relatively small, the demand peak value can be reduced without causing discomfort or anxiety to facility users. Reduction is possible.

Furthermore, for at least some lighting devices, the brighter the outdoors, the higher the speed at which the illuminance is reduced and the evacuated power value is also reduced, so the effect of reducing the demand peak value can be enhanced. In particular, if it is a zone near a cash register near a doorway, such as a supermarket, where external light is incident, there will be no discomfort even if the minimum illuminance is reduced during the day, and the speed at which the illuminance is reduced will be increased. Therefore, it is possible to greatly reduce the demand peak value while not being noticed by facility users by greatly reducing the power consumed by lighting equipment corresponding to such places. Become.

According to the configuration of the invention of claim 2 , after the demand control is performed to reduce the light output of the lighting device, the light output of the lighting device is not restored immediately after the end of the demand time period, but is fixed after the demand time period. Since demand control is maintained during the time, the demand control is performed so that the user of the facility does not feel a sense of incongruity due to illuminance change without frequently repeating the dimming, returning, and dimming states at each demand period. Can do.

According to the configuration of the invention of claim 3 , since the air conditioner also performs the demand control when the demand control of the lighting device is insufficient, the instantaneous power value is greatly increased when necessary while suppressing the change in the temperature as much as possible. To increase the demand peak value.

According to the configuration of the invention of claim 4 , it is possible to perform demand control between the lighting device and the air conditioning device, and which one of the demand control of the lighting device and the demand control of the air conditioning device is mainly performed according to an external condition. Therefore, rational demand control becomes possible when the outside temperature or the outdoor brightness is used as the external condition or the number of users in the facility is used. Moreover, since demand control is performed with one of the lighting equipment and the air conditioning equipment as the main and the other as the slave, appropriate demand control using one of the lighting equipment and the air conditioning equipment is performed according to external conditions, and it is necessary. Accordingly, by performing demand control using both the lighting device and the air conditioning device, when the demand value is predicted to increase greatly, the increase in the demand peak value can be greatly suppressed.

  In each embodiment described below, description will be made on the assumption that it is used in a commercial facility such as a large supermarket, a department store, or a shopping mall. In this type of commercial facility, a large number of lighting devices are used together with electric devices (hereinafter simply referred to as “devices”) such as air conditioners and refrigeration units, and the power consumption of lighting devices is the power consumption of other devices. It is large enough compared to

  For example, in a supermarket that mainly sells foods, the power consumption of lighting equipment may be five to seven times that of air conditioning equipment even in summer. Therefore, in this type of commercial facility, the effect of reducing the power consumption is higher by suppressing the power consumption of the lighting device by 30 to 50% than by stopping the air conditioner (lowering the power consumption by 100%). In view of such circumstances, in the following embodiment, demand control is performed by adjusting the power consumption in the lighting device. The following description will be given assuming a store as a commercial facility.

(Embodiment 1)
As shown in FIG. 1, the demand control device 10 is a device having a computer as a main component, and is a power supply path to load devices (lighting device 21, air conditioning device 22, refrigeration device 23, and other devices). For each type of load receiving device (lighting device 21 and air conditioning device 22) excluding the refrigeration and refrigerating device 23, and the signal receiving unit 11 to which a pulse signal generated at every fixed amount of power is input from the watt hour meter 20 inserted into the power line Lp. Control output units 12a and 12b that output control signals for adjusting power consumption are provided. Each of the control output units 12a and 12b can control one or more systems (preferably a plurality of systems).

  The control output unit 12a corresponding to the lighting device 21 has a function of outputting a dimming signal to the lighting device 21 having a dimming function. A lighting device 21 that does not have a dimming function is connected between the control output unit 12a and the lighting device 21 via a dimmer. Moreover, the structure which outputs the control signal which instruct | indicates only lighting and light extinction of the illuminating device 21 from the control output part 12a is also employable. The control output unit 12a corresponding to the air conditioner 22 controls on / off of the air conditioner 22 by outputting a control signal corresponding to the JEM-A standard, for example.

  The demand control device 10 includes a power calculation unit 13 that obtains an amount of power from a pulse signal input to the signal reception unit 11. The power calculation unit 13 includes an instantaneous power calculation unit 13a that integrates a pulse signal with a pulse integration time of a fixed time of about 1 to 5 minutes (5 minutes in the illustrated example), and a fixed time set to 30 minutes, for example. The integrated power calculation unit 13b that integrates the output value of the instantaneous power calculation unit 13a within the demand time period T1 (see FIG. 3). Therefore, in the demand time limit T1, the output of the instantaneous power calculation unit 13a increases and decreases, and the output of the integrated power calculation unit 13b increases with time. Hereinafter, the output value of the instantaneous power calculation unit 13a is referred to as an instantaneous power value, and the output value of the integrated power calculation unit 13b is referred to as an integrated power value. The demand control device 10 is also provided with a timer unit 14 for measuring the pulse integration time for integrating the pulse signals by the instantaneous power calculation unit 13a. The timer unit 14 also measures the date of the month and instructs the start date and time of the demand time limit. The timer unit 14 also measures the demand time limit T1 and a later-described alarm lock time T2 (see FIG. 3).

  The integrated power calculation unit 13b outputs an integrated power value for each pulse integration time. Using this integrated power value, the demand prediction unit 15 uses the management power value Ps () defined by the integrated power value until the end of the demand time period T1. (See FIG. 3). In the present embodiment, the value of contract power is used as the management power value Ps, but a value slightly smaller than the contract power may be used as the management power value Ps. However, the prediction by the demand prediction unit 15 is not performed until a certain alarm lock time T2 has elapsed from the start of the demand time period, and demand control for adjusting the demand value is prohibited during the alarm lock time T2. The alarm lock time T2 is set to 20 minutes in this embodiment, but this value can be changed as appropriate.

  The prediction in the demand prediction unit 15 is performed at the end of the alarm lock time T2, and the power integrated value at the end of the demand time period T1 is predicted from the tendency of increase / decrease in the integrated power value before the end of the alarm lock time T2. . As this prediction, for example, linear prediction obtained by extending a straight line connecting the integrated power value at the end time of the alarm lock time T2 and the integrated power value at the time point that is traced back by the pulse integrated time from that time point is used.

  When the demand prediction unit 15 determines that the integrated power value exceeds the management power value Ps by the end of the demand time period T1, the control unit 16 illuminates the control output unit 12a to which the lighting device 21 is connected. 21 is instructed to reduce power consumption. That is, dimming control of the lighting device 21 is performed.

  The operations of the demand control apparatus 10 described above are collectively shown in FIG. First, timing of the demand time period T1 is started (S1), and when the alarm lock time T2 has elapsed (S2), whether or not the integrated power value exceeds the management power value Ps before the demand time period T1 ends in the demand prediction unit 15. Is made (S3). When it is determined that the integrated power value does not exceed the management power value Ps (step S3: yes), the current state is maintained. On the other hand, when it is determined in step S3 that the integrated power value exceeds the management power value Ps (step S3: no), the dimming control of the lighting device 21 is instructed (S4). Thereafter, when the demand time limit T1 ends (S5), the process returns to step S1 to repeat the above-described processing.

  By the above-described operation, as shown in FIG. 3A, a demand power is calculated based on the integrated power value at the time when the alarm lock time T2 ends and the integrated power value at the time before the pulse lock time from the end of the alarm lock time T2. When it is predicted that the integrated power value will exceed the management power value Ps by the end of the time period T1 (broken line in FIG. 3A), as indicated by a symbol (A) in FIG. Then, dimming control is performed so as to reduce the power consumption in the lighting device 21 from the end of the alarm lock time T2. In the illustrated example, compared to a case where demand control is not performed, the amount of power corresponding to the shaded portion is reduced ((b) also includes power supplied to a device not performing demand control).

  The degree of reduction in power consumption in the lighting device 21 may be adjusted as appropriate according to the integrated power value predicted at the end of the demand time period T1 (or when the integrated power value exceeds the management power value Ps). Conceivable. However, when the light output of the lighting device 21 changes greatly, a change in illuminance is perceived by customers in the store, which may cause discomfort and anxiety to the customers. Therefore, the degree of reduction in power consumption is regulated so that the illuminance in the store changes so as not to cause discomfort to the customer.

  Hereinafter, in the case of reducing the instantaneous power value consumed by the lighting device 21, the instantaneous power value consumed by the lighting device 21 at the end of the demand time period T1 is referred to as a evacuated power value Pe. The evacuation power value Pe is set to a value obtained by subtracting several percent from the instantaneous power value when the lighting device 21 is fully lit. In addition, when it is possible to control the light output of the lighting device 21 for each system, and there is a lighting device 21 that can be temporarily turned off, the evacuated power value for the lighting device 21 is present. Pe can be set to zero.

  In the present embodiment, since demand control is not performed for the air conditioner 22, no significant change occurs in the instantaneous power value of the air conditioner 22. In other words, the operation of the air conditioner 22 is given priority to maintain the temperature in the store, and the light output of the lighting device 21 is limited for demand control. Therefore, the sum of the instantaneous power values of the respective devices (the lighting device 21, the air conditioning device 22, the freezer / refrigeration device 23, and other devices) calculated by the instantaneous power calculation unit 13a is indicated by a symbol (b) in FIG. To change. As described above, since the power consumption of the lighting device 21 is several times that of the air conditioning device 22, the overall power consumption is greatly reduced even if the power consumption of the lighting device 21 is reduced by only a few percent. It is reduced.

  Here, it is considered that the power consumption in the air conditioner 22 increases and demand control is generally required during the daytime when the outside air temperature rises. Depending on the daylighting method in the store, the daytime In many cases, the illuminance by natural light can be ensured in many cases, and it is considered that there is often no sense of incongruity even if the light output of the lighting device 21 is reduced. By maintaining it, it is possible to expect an effect that enables demand control without causing a sense of incongruity to the customer.

  In addition, in the configuration example shown in FIG. 1, it is assumed that a signal line is provided separately from the power line Lp as a signal path for giving a dimming signal or a control signal to the lighting device 21 or giving a control signal to the air conditioning device 22. However, the signal may be transmitted using a power line carrier technique.

(Embodiment 2)
In the first embodiment, when the demand prediction unit 15 predicts that the integrated power value exceeds the management power value Ps by the end of the demand time limit T1, the instantaneous power value consumed by the lighting device 21 is reduced to the evacuation power value Pe. Pulling down instantly. Therefore, since the light output of the lighting device 21 changes abruptly, depending on the setting of the evacuation power value Pe, a change in the light output of the lighting device 21 may be easily noticed by customers in the store. Therefore, in this embodiment, instead of instantaneously reducing the value to the evacuated power value Pe, the controller 16 instantaneously consumes the lighting device 21 during the period from the end of the alarm lock time T2 to the end of the demand time period T1. The power value is gradually reduced toward the evacuation power value Pe.

  That is, as shown in FIG. 4 (a), when it is predicted that the integrated power value will exceed the management power value Ps by the end of the demand time period T1 when the alarm lock time T2 ends, FIG. ), The control unit 16 performs dimming so as to gradually reduce the power consumption in the lighting device 21 from the end point of the alarm lock time T2 to the evacuated power value Pe as time elapses. Take control. Also in the present embodiment, power consumption corresponding to the shaded area is reduced as compared with the case where demand control is not performed. Other configurations and operations are the same as those of the first embodiment.

  In the configuration of the present embodiment, the light output of the lighting device 21 is not instantaneously reduced at the end of the alarm lock time T2, but the light output gradually decreases in about 10 minutes. It becomes difficult for customers in the store to notice changes in light output. That is, demand control can be performed without causing discomfort and anxiety associated with changes in illuminance.

(Embodiment 3)
In the present embodiment, a brightness sensor 17 for detecting outdoor brightness is added to the configuration of the first embodiment (see FIG. 1). The brightness sensor 17 does not necessarily have to be installed outdoors, and may be installed in a place where outside light can be detected, such as in the vicinity of a window facing the outdoors, even in a store.

  The outdoor brightness detected by the brightness sensor 17 is used as information for setting the evacuation power value Pe (the dimming level when the specifications regarding the power consumption of the lighting device 21 are different) in the control unit 16. Moreover, in this embodiment, the system | strain which controls the illuminating device 21 according to the zone in a shop shall be isolate | separated. Here, it is assumed that the cash register is installed in the vicinity of the window, and the lighting device 21 in the cash register zone in which the cash register is arranged can be controlled by a separate system from the lighting devices 21 in other zones.

  Under such conditions, external light is incident on the registration zone during the daytime, so it is considered that no discomfort will occur even if the illuminance by the illumination light decreases. In other words, when the illuminance due to external light is high in a zone where external light is incident, it can be said that the minimum illuminance that does not cause discomfort and anxiety is low compared to a zone where external light is not incident.

  Utilizing this fact, when the outdoor brightness detected by the brightness sensor 17 is equal to or higher than a prescribed reference value, and when the outside light is in a zone (in this embodiment, a registration zone), The evacuation power value Pe is set to be smaller (the dimming level is lower) than in the case where demand control is performed for the lighting device 21 arranged in this zone.

  FIG. 5 summarizes the operation of this embodiment. In the figure, the evacuation illuminance 1 and the evacuation illuminance 2 mean that the dimming levels for the illumination devices 21 of each system corresponding to the zone are different, and the dimming level corresponding to the evacuation illuminance 2 corresponds to the evacuation illuminance 1. It is smaller than the dimming level.

  That is, the timing of the demand time period T1 is started (S1), and when the alarm lock time T2 elapses (S2), the demand prediction unit 15 determines whether or not the integrated power value exceeds the management power value Ps before the end of the demand time period T1. Is made (S3). If it is determined that the integrated power value does not exceed the management power value Ps (step S3: yes), the current state is maintained. On the other hand, if it is determined in step S3 that the integrated power value exceeds the management power value Ps (step S3: no), the outdoor brightness detected by the brightness sensor 17 is equal to or greater than a specified reference value. Is determined (S4).

  If the outdoor brightness is equal to or greater than the prescribed reference value (S4: yes), it is further determined whether or not the zone where the lighting device 21 is arranged is affected by outside light (S5). Here, if the zone is affected by external light (S5: yes), the lighting fixture 21 is dimmed and controlled so that the evacuation illuminance is 2 (the lower dimming level) (S6). If it is a zone that does not receive light (S5: no), the lighting fixture 21 is dimmed and controlled so that the evacuation illuminance is 1 (the higher dimming level) (S7).

  In step S4, when the outdoor brightness detected by the brightness sensor 17 is lower than the reference value (that is, at night or in the rain), the evacuation illuminance 1 is set for all the lighting devices 21 regardless of the zone. Adopt (S8). Thereafter, when the demand time limit T1 ends (S9), the process returns to step S1 and the above-described processing is repeated.

  By setting the evacuation power value Pe (dimming level) for each zone as in the present embodiment, it is possible to use outside light in a sunny day or the like, and the temperature rises and the power consumption by the air conditioner 22 is reduced. When it is considered that the power consumption is increased, the power consumption by the lighting device 21 is further suppressed, so that balanced demand control can be performed while preventing the customer from feeling uncomfortable or uneasy. Other configurations and operations are the same as those of the first embodiment. In the present embodiment, the lighting device 21 is divided into two systems and controlled according to the zone. However, the lighting device 21 may be divided into three or more zones according to the degree of incident external light. Good.

(Embodiment 4)
In the present embodiment, a brightness sensor 17 (see FIG. 1) for detecting outdoor brightness is provided as in the third embodiment. However, as in the second embodiment, a technique is adopted in which the light output of the lighting device 21 is gradually reduced over time during demand control. That is, the control systems of the lighting devices 21 arranged in different zones are made different, and as in the third embodiment, the evacuation power value (that is, the dimming level) depends on whether external light is incident or the zone. Is set in multiple stages. In the third embodiment, only the dimming level is set in a plurality of stages. However, in the present embodiment, the dimming level is reduced to a level corresponding to the saved power value as time elapses. The speed (dimming speed) is also set in a plurality of stages. Other configurations and operations are the same as those of the third embodiment.

  That is, as shown in FIG. 6, the timing of the demand time period T1 is started (S1), and when the alarm lock time T2 elapses (S2), the integrated power value is managed by the demand prediction unit 15 before the end of the demand time period T1. It is determined whether or not the value Ps is exceeded (S3). When it is determined that the integrated power value does not exceed the management power value Ps (step S3: yes), the current state is maintained. If it is determined in step S3 that the integrated power value exceeds the management power value Ps (step S3: no), whether or not the outdoor brightness detected by the brightness sensor 17 is equal to or greater than a specified reference value. Is determined (S4).

  If the outdoor brightness is equal to or greater than the prescribed reference value (S4: yes), it is further determined whether or not the zone where the lighting device 21 is arranged is affected by outside light (S5). If the zone is affected by external light (S5: yes), the lighting fixture is set so that the light reduction speed is 2 (the dimming speed is faster and the dimming level at the end of the demand time period T1 is lower). If the zone 21 is not affected by outside light (S5: no), the dimming speed is 1 (the slower dimming speed at the end of the demand time period T1). The light fixture 21 is dimmed and controlled so that the level becomes higher (S7).

  In step S4, when the outdoor brightness detected by the brightness sensor 17 is lower than the reference value (that is, at night or in the rain), the dimming speed 1 for all the lighting devices 21 regardless of the zone. Is adopted (S8). Thereafter, when the demand time limit T1 ends (S9), the process returns to step S1 and the above-described processing is repeated. Other configurations and operations are the same as those of the third embodiment.

  When the dimming speed is set for each zone as in the present embodiment, it is possible to use outside light when the weather is fine, and when the temperature rises and the power consumption by the air conditioner 22 is considered to increase. The power consumption by the lighting device 21 can be further suppressed. Moreover, since the light output is gradually reduced toward the dimming level that becomes the evacuated power value as time elapses, rather than suddenly reducing the light output, the discomfort and anxiety associated with the decrease in illuminance are further increased. Further reduction can be achieved. Other configurations and operations are the same as those of the third embodiment.

(Embodiment 5)
In each of the above-described embodiments, an example of demand control in one demand time period T1 has been shown. However, when the original state is restored in the next demand time period T1, the power supplied to the lighting device 21 increases, and the demand time period is increased. A change occurs in the light output at the boundary of T1. Although the change in the light output for demand control is relatively small, when the light output changes for each demand time period T1, the instantaneous power value supplied to the lighting device 21 changes for each demand time period T1, as shown in FIG. However, during the period in which the customer stays in the store (considered to be about 30 minutes to 1 hour), the light output changes a plurality of times, which may make the customer feel uncomfortable. In the present embodiment, the number of changes in the light output during the staying period of the customer is reduced (about 1 time) so as to prevent the customer from feeling discomfort and anxiety associated with demand control.

  That is, as shown in FIG. 7, after the demand time period T1 in which the demand control is performed, the demand control is not canceled at least in the next demand time period T1, and the power supplied to the lighting device 21 is maintained at the evacuated power value Pe. . In the illustrated example, the demand power control Pe is maintained for the two demand time periods T1 after the demand time period T1 in which the demand control is performed, without releasing the demand control. The release of the demand control may be such that the demand control is maintained in a time zone in which the power consumption increases based on the past control history. Moreover, you may make it maintain demand control in the time slot | zone when temperature rises with reference to external temperature and external light quantity. Further, it is possible to return after a certain time regardless of the demand time limit T1.

  FIG. 9 shows an operation when the technical idea of the present embodiment is applied to the first embodiment. That is, the timing of the demand time period T1 is started (S1), and when the alarm lock time T2 elapses (S2), the demand prediction unit 15 determines whether or not the integrated power value exceeds the management power value Ps before the end of the demand time period T1. Is determined (S3). When it is determined that the integrated power value does not exceed the management power value Ps (step S3: yes), the current state is maintained, and when the demand time limit T1 ends (S4), the process returns to step S1.

  On the other hand, if it is determined in step S3 that the integrated power value exceeds the management power value Ps (step S3: no), the dimming control of the lighting device 21 is instructed (S5). After instructing the dimming control of the lighting device 21, the dimming control in step S4 is maintained until a predetermined time elapses (S6). When the predetermined time elapses, the dimming control is canceled and the original light output is restored. (S7).

  By the way, when canceling the demand control, the power supplied to the lighting device 21 may be immediately returned to the original power value. However, if the demand power is gradually brought closer to the original power value at each demand time period T1, Demand control can be canceled without making the customer feel uncomfortable. Other configurations and operations are the same as those in each of the above-described embodiments, and the above-described operation example has been described as applied to the first embodiment. However, it is also possible to apply to the operations of the second to fourth embodiments.

(Embodiment 6)
In the above-described embodiment, demand control is performed only by the power consumed by the lighting device 21, but in the present embodiment, the demand control is performed using the power consumption of the air conditioning device 22 in addition to the lighting device 21. It is. That is, the above-described embodiment is based on the precondition that the instantaneous power value consumed by the lighting device 21 is several times the instantaneous power value consumed by the air conditioning device 22, but this condition is not necessarily satisfied depending on the facility. In some cases. Further, when demand control by the lighting device 21 is performed, a decrease in illuminance is caused. Therefore, if the power consumption is to be significantly reduced, the customers in the store are made to feel uncomfortable or uneasy. Therefore, there is a limit to the amount of power that can be reduced with the lighting device 21 alone, and depending on the power distribution between the lighting device 21 and other devices, the demand peak value is managed by demand control of only the lighting device 21 during the midsummer period. It is conceivable that the power value Ps is reached.

  In the present embodiment, demand control is performed only by the lighting device 21 at all times, and when the demand control is insufficient even if the power consumed by the lighting device 21 is reduced to the evacuation power value Pe, the demand control is also performed for the air conditioning device 22. As a result, the demand peak value is lowered. That is, the control unit 16 shown in FIG. 1 determines a demand peak value when the power consumed by the lighting device 21 is reduced to the evacuated power value Pe. If the demand control is insufficient, the air conditioning device 22 also demands. It is instructed to perform control. The demand control of the air conditioner 22 employs techniques such as stopping the air conditioner 22, blowing operation, and suppressing power consumption of the compressor, as in the conventional configuration. About demand control of lighting equipment 21, it is the same as that of other embodiments, and the technique of this embodiment is applicable to Embodiments 1-5 mentioned above.

(Embodiment 7)
In the present embodiment, demand control is performed for the air conditioner 22 in addition to the lighting device 21 as in the sixth embodiment. However, in the sixth embodiment, the demand control of the air conditioner 22 is also performed when the effect of reducing the demand peak value is insufficient even when the demand control of the lighting device 21 is performed. The embodiment is different in that a determination rule for determining which demand control of the lighting device 21 or the air conditioning device 22 is mainly adopted based on an external condition is introduced. In order to apply the determination rule, in the present embodiment, a condition input unit (not shown) that gives an external condition to the control unit 16 is provided instead of the brightness sensor 17. Here, the external condition is a condition related to the illuminance and temperature in the store. That is, it is determined which demand control of the lighting device 21 or the air conditioning device 22 is mainly used by applying an external condition to the determination rule.

In the present embodiment, as an external condition for applying the determination rule, an example is shown in which any one of information on sunlight and temperature outside the store and the number of people in the store is used. Information relating to sunshine and temperature outside the store can be obtained from temperature sensors, brightness sensors, providers of weather-related services, and the like. The number of people in the store can be counted by various techniques. For example, a guideline can be obtained by measuring the number of customers by counting the number of visitors and exits at the entrance.

  Assuming that the outside air temperature is high during a clear day, if the natural light can be used in the store, the customer is less likely to feel uncomfortable even if the illumination intensity of the lighting device 21 is lowered. When the temperature in the store rises due to the rise, it causes discomfort to the customer. In such a case, it can be said that it is better to perform the demand control of the lighting device 21 by continuing the operation of the air conditioning device 22. That is, it becomes operation | movement of each embodiment mentioned above.

  On the other hand, when the outside air temperature is relatively low during a cloudy day but the illuminance in the store is insufficient with natural light, it is desirable to give priority to securing the illuminance by the lighting device 21 even if the operation of the air conditioner 22 is restricted. In such a case, it can be said that it is reasonable to use the demand control of the air conditioner 22 as the main and the demand control of the lighting device 21 as the slave.

  Therefore, as shown in FIG. 10, the timing of the demand time period T1 is started (S1), and when the alarm lock time T2 elapses (S2), the integrated power value is managed by the demand prediction unit 15 before the end of the demand time period T1. It is determined whether or not the value Ps is exceeded (S3). When it is determined that the integrated power value does not exceed the management power value Ps (step S3: yes), the current state is maintained. If it is determined in step S3 that the integrated power value exceeds the management power value Ps (step S3: no), the outside air temperature is compared with the reference value (S4a), and if the outside air temperature is equal to or higher than the reference value (S4a : Yes), the dimming control of the lighting device 21 is instructed (S5). Here, if the effect of reducing the demand peak value (demand peak cut effect) is satisfied (S6: yes), the operation is maintained as it is. If the demand peak cut effect is insufficient in step S6 (S6: no), the air conditioner 21 is also demand-controlled (S7).

  By the way, when outside temperature is lower than a reference value in step S4a (S4a: no), the illumination intensity outside a store is compared with a reference value (S4b). When the illuminance is equal to or higher than the reference value (S4b: yes), the demand control of the lighting device 21 is mainly performed as in the case where the outside air temperature is equal to or higher than the reference value.

  On the other hand, when the illuminance outside the store is lower than the reference value (S4b: no), the demand control of the air conditioner 22 is performed (S8), and when the demand peak cut effect can be obtained only by the air conditioner 22 (S9: yes). Continue the operation as it is. When the demand peak cut effect is insufficient with only the air conditioner 22 (S9: no), the dimming control of the lighting device 21 is instructed (S10). In this way, the outside temperature and the illuminance outside the store are external conditions, and which of the demand control of the lighting equipment 21 and the air conditioning equipment 22 is mainly used according to the magnitude relationship between the external conditions and the reference value. Therefore, it is possible to perform demand control so as not to make the customer feel uncomfortable. If the demand time limit T1 is completed (S11), the process returns to step S1.

  In the above example, the outside air temperature and the illuminance outside the store are used as external conditions, but the number of customers in the store may be used as external conditions. That is, as shown in FIG. 11, instead of the determination in steps S4a and S4b in FIG. 10, it is determined whether the number of customers is equal to or greater than a reference value (S4). That is, when the number of customers is equal to or larger than the reference value (S4: yes), the demand control of the lighting device 21 is mainly performed. When the number of customers is smaller than the reference value (S4: no), the demand of the air conditioner 22 Mainly controls.

  Although this operation is difficult for customers in the store to notice when demand control is performed to reduce the illuminance in the store, there is an impression that the inside of the store is dark when the store is viewed from outside the store There is a possibility that the attractiveness of customers to the store may be reduced. Even in such a case, if the number of customers in the store is large, it is considered that the attractiveness of the customers does not decrease so much. On the other hand, if the number of customers in the store is small, it is considered that the operation of the air conditioner 22 can be suppressed because the amount of heat generated by the customers is small.

  In view of such circumstances, the demand control of the air conditioner 22 is mainly performed when the number of customers in the store is small (S8 to S10), and the demand control of the lighting device 21 is mainly performed when the number of customers in the store is large. (S5 to S7). However, as in the sixth embodiment, when the demand peak cut effect is insufficient only with one demand control of the lighting device 21 and the air conditioning device 22, the other demand control is also used. Other configurations and operations are the same as those in the sixth embodiment.

It is a block diagram which shows embodiment of this invention. FIG. 6 is an operation explanatory diagram illustrating a procedure of the first embodiment. It is operation | movement explanatory drawing same as the above. FIG. 9 is an operation explanatory diagram of the second embodiment. FIG. 10 is an operation explanatory diagram illustrating a procedure of the third embodiment. FIG. 10 is an operation explanatory diagram illustrating a procedure of the fourth embodiment. FIG. 10 is an operation explanatory diagram of the fifth embodiment. It is operation | movement explanatory drawing of a comparative example. FIG. 10 is an operation explanatory diagram illustrating a procedure of the fifth embodiment. FIG. 20 is an operation explanatory diagram illustrating the procedure of the seventh embodiment. FIG. 25 is an operation explanatory diagram illustrating another procedure of the seventh embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Demand control apparatus 11 Signal receiving part 12a Control output part 12b Control output part 13a Instantaneous electric power calculation part 13b Accumulated electric power calculation part 14 Timer part 15 Demand prediction part 16 Control part 17 Brightness sensor 20 Electricity meter 21 Lighting equipment 22 Air conditioner

Claims (5)

This is a demand control system that performs demand control so that the demand peak value, which is the maximum demand value obtained for each demand time period, does not exceed the contracted power in a facility with a large number of lighting equipment installed together with other electrical equipment. Whether or not the demand peak value exceeds the contract power from the watt-hour meter that detects the power supplied to the electrical equipment in the facility and the change in the integrated power value within the demand time period calculated from the power detected by the watt-hour meter Demand prediction unit that predicts in advance, and control that performs demand control that suppresses the instantaneous power value consumed by lighting equipment to a specified evacuated power value when the demand prediction unit predicts that the demand peak value exceeds contract power comprising a part, and a brightness sensor for detecting the brightness of outdoor control unit period smell from the start of demand control until the end of the demand time period Gradually reduce the power consumed by the lighting equipment over time, and obtain the output of the brightness sensor for at least some lighting equipment. A demand control system characterized by speeding up and reaching a saved power value at the end of the demand period . The demand control system according to claim 1 , wherein the control unit does not cancel the demand control that suppresses the power consumed by the lighting device for a certain time after the demand time period when the demand control is started . The electrical equipment other than the lighting equipment includes an air conditioning equipment, and the control unit uses the power consumption of the air conditioning equipment when the demand peak value is predicted to exceed the contract power only by demand control that suppresses the power consumed by the lighting equipment. demand control system according to claim 1 or 2, wherein the suppressing together. Demand that controls demand so that the demand peak value, which is the maximum value of the demand value obtained at each demand time limit, does not exceed the contracted power in facilities equipped with air conditioning equipment and a large number of lighting equipment installed with other electrical equipment A power system that detects the instantaneous power value supplied to the electrical equipment in the facility and a demand peak value contracted from the change in the integrated power value within the demand time period determined from the power detected by the power meter Defines the demand forecasting unit that predicts whether or not the power will be exceeded in advance, and the instantaneous power value consumed by at least one of the lighting equipment and air conditioning equipment when the demand forecasting unit predicts that the demand peak value exceeds the contracted power Control unit that performs demand control to reduce the evacuated power value, brightness sensor that detects outdoor brightness, and temperature that detects outdoor temperature Including a sensor and a condition input unit that gives the control unit external conditions related to illuminance and temperature in the facility, and the control unit applies the external conditions given from the condition input unit to the regulation rules. Determine whether the demand control of the lighting equipment or air-conditioning equipment is mainly performed, reduce the power consumed by at least one of the lighting equipment or air-conditioning equipment according to the judgment result, and further change the demand time limit from the start of demand control. Gradually reduce the power consumed over time in the period up to the end, acquire the output of the brightness sensor for at least some lighting equipment, lower the evacuated power value and reduce the power as the outdoors gets brighter A demand control system characterized by increasing the speed and reaching the evacuated power value at the end of the demand period . This is a demand control method that performs demand control so that the demand peak value, which is the maximum value of the demand value obtained for each demand time period, does not exceed the contract power in a facility with a large number of lighting devices installed together with other electrical devices. Whether or not the demand peak value exceeds the contract power in advance from the change in the integrated power value within the demand time period using the instantaneous power value acquired from the watt-hour meter that detects the power supplied to the electrical equipment in the facility Demand control that suppresses the instantaneous power value consumed by lighting equipment to the specified evacuated power value when the demand peak value is predicted to exceed the contract power, from the start of demand control to the end of the demand time limit During this period, the power consumed by the lighting equipment is gradually reduced over time, and the brightness of the outdoors is checked for at least some lighting equipment. Brightness take the output of the sensor to increase the speed to reduce power with lower the higher the outdoor bright retraction power value, demand control method, characterized in that to reach a retracted power value at the end of the demand time to.

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