JP2004274852A - Power reduction system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power reduction system capable of determining precisely power reduction effect, when reducing power of power load equipment. <P>SOLUTION: The monitor signal acquired by monitoring power consumption, using a watthour meter 32 for power load equipment containing a plurality of apparatus 40, to which a power is supplied is collected by communication between a control terminal 13 and each apparatus 40 connected to a control part 20 via a HUB11, PBX12, and telephone circuit 13. A control signal is transmitted to each apparatus 40 by the behavior of a communication unit 21, basic unit 22, and power unit 23 contained in the control part 20. The operation of each apparatus 40 is controlled by opening/closing control with a relay 24, in accordance with a prescribed control pattern; the controlled state is released for a given period, to provide a control-released state; and the power consumption of the controlled state and the control-released state is extracted, to decide on the power reduction effect for the power load equipment. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power reduction system that controls power load equipment including one or a plurality of devices to be supplied with power and reduces the amount of power used by the power load equipment. The present invention relates to a power reduction system that controls a power load facility such as a store or an office of a customer and gives the customer an advantage of reducing a power rate.
[0002]
[Prior art]
Conventionally, for example, various stores such as air conditioners and refrigerators are installed in various stores such as supermarkets, and the power consumption of the entire store becomes considerably large. It was requested to reduce it. Therefore, there is known a service for reducing power consumption by controlling the operation of each device to which power is supplied, for power load facilities such as stores. Businesses that provide such services have customers in offices and amusement facilities in addition to stores, and have built a power reduction system that performs rational operation control of various devices, thereby enabling customers to pay The benefits of reduction can be enjoyed.
[0003]
[Problems to be solved by the invention]
In the above-described conventional power reduction system, the entire power consumption is reduced by, for example, turning on / off an air conditioner or a refrigerator at a fixed cycle with each device included in the power load equipment being controlled. . In this case, a certain power reduction effect can be obtained by appropriately setting the operation time and the rest time of each device within a range where the usage environment can be maintained.
[0004]
However, when a customer who has introduced the power reduction system wants to know the specific amount of reduction in the power rate, it is not easy to determine the exact reduction amount. That is, in the case of a store or the like in which a large number of air conditioners are installed, it is possible to compare the past (for example, one year ago) electricity rate before the introduction of the power reduction system with the current electricity rate. It is. However, in the situation where the facilities of the store are actually changed (increased or reduced), or in the situation where there are differences in various conditions such as the sales of the store and the weather, there is a possibility that a correct comparison of the electricity rates may not be possible. That is, it is difficult for a customer who has introduced the power reduction system to accurately determine the merits thereof.
[0005]
Accordingly, the present invention has been made in view of such a problem, and when reducing the amount of power consumption by controlling the operation of the devices included in the power load facility, the power consumption of each device in the control state and the control release state is controlled. An object of the present invention is to provide a power reduction system capable of extracting a usage amount and determining a power reduction effect with high accuracy.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, a power reduction system according to claim 1 controls a power load facility including one or a plurality of devices to which power is supplied, and reduces power consumption of the power load facility. A reduction system, a communication unit that transmits and receives a predetermined signal to and from the device via a communication line, monitors an operation state and power consumption of the device, and obtains a monitoring signal by the communication unit. A monitoring means for collecting, an operation control means for sending a control signal to the equipment by the communication means, and an operation control of the equipment in accordance with a predetermined control pattern; and a control state of the operation control means for releasing for a predetermined period. And a determination means for extracting the power consumption of each of the control state and the control release state, and determining a power reduction effect in the power load facility. To.
[0007]
According to the present invention, when controlling a power load facility in a power reduction system, a monitoring signal of a device is acquired via a communication line, and a control signal is transmitted to the device, and the device transmits the control signal to the device in accordance with a predetermined control pattern. Operation control. At this time, in order to determine the power reduction effect, the control state and the control release state are alternately repeated during the operation control of the device, and each power consumption is extracted. In the control state, the power consumption of the device can be reduced in accordance with the control pattern.On the other hand, in the control release state, the original power consumption of the device is reflected. You can ask. Therefore, compared to the method of comparing with the past power consumption, it is possible to judge the power reduction effect with high accuracy while eliminating the equipment change and the difference in the usage environment, and the advantage of introducing the power reduction system is It is possible to make an accurate judgment.
[0008]
A power reduction system according to a second aspect is the power reduction system according to the first aspect, further comprising a power rate calculation unit configured to calculate a power rate to be reduced corresponding to the power reduction effect determined by the determination unit. It is characterized by the following.
[0009]
According to this invention, in addition to the operation of the invention described in claim 1, the power reduction system calculates a power rate to be reduced corresponding to the power reduction effect. Therefore, in a store or an office, it is possible to accurately determine the merits of reducing the power rate when the power reduction system is introduced.
[0010]
A power reduction system according to a third aspect is the power reduction system according to the first aspect, wherein the operation control unit performs operation control by alternately switching on / off of the device at a predetermined cycle. Features.
[0011]
According to this invention, in addition to the operation of the invention described in claim 1, the ON / OFF of the device is alternately switched at a predetermined cycle for the operation control of the device. Therefore, the power consumption can be reduced according to the ratio of the operation and the suspension of the device, and the power reduction effect at that time can be easily determined by the above-described method.
[0012]
A power reduction system according to a fourth aspect of the present invention is the power reduction system according to the first aspect, wherein the determination unit is in a control release state at a preset sampling interval and release time.
[0013]
According to this invention, in addition to the operation of the invention described in claim 1, when shifting to the control release state of the device, control is performed at a preset sampling interval and release time. Therefore, the device can be shifted to the control release state so that the time zone and the determination accuracy become optimal conditions, and a more accurate power reduction effect can be determined.
[0014]
According to a fifth aspect of the present invention, in the power reduction system according to the third aspect, the determination unit determines the control state for M (integer) cycles with respect to a predetermined cycle of the device; The control release state for an (integer) cycle is alternately shifted, and the power consumption in each cycle is integrated and extracted.
[0015]
According to this invention, in addition to the operation of the invention described in claim 3, a control state and a control release state for a predetermined integer (M, N) cycles are alternately performed with respect to a cycle for switching on / off of the device. Then, the power consumption in each cycle is integrated and extracted. Therefore, by appropriately setting the ratio between M and N, it is possible to realize operation control that optimizes the balance between the actually obtained power reduction amount and the measurement accuracy of the power reduction effect.
[0016]
7. The power reduction system according to claim 6, wherein, in the power reduction system according to claim 3, the determination unit performs the transition between the control state and the control release state on a predetermined date of a month. On days other than the above, only the control state is maintained, and the power consumption during each date is integrated.
[0017]
According to this invention, in addition to the effect of the invention described in claim 3, a date to alternately shift between the control state and the control release state within a month is determined, and other dates are kept only in the control state, The power consumption within the date is integrated. Therefore, it is possible to realize operation control that optimizes the balance between the amount of power reduction actually obtained during the month and the measurement accuracy of the power reduction effect according to the tendency during the month.
[0018]
The power reduction system according to claim 7 is the power reduction system according to claim 1, wherein the operation control unit selects an optimum control pattern from a plurality of control patterns based on the monitoring signal. Features.
[0019]
According to this invention, in addition to the effect of the invention described in claim 1, the operation state of the device is monitored, and an optimum one is selected from a plurality of control patterns and used according to the monitoring signal. Therefore, for example, the equipment can be finely controlled so as to always maintain a stable operation state with respect to an environmental change such as an ambient temperature, and the reliability can be improved.
[0020]
9. The power reduction system according to claim 8, wherein a business operator that provides service to a customer who uses a power load facility including one or a plurality of devices to be supplied with power controls the power load facility to provide the customer with a service. A power reduction system that provides the advantage of reducing power charges, a communication unit that transmits and receives a predetermined signal to and from the device via a communication line, and monitors an operation state and power consumption of the device, Monitoring means for collecting the obtained monitoring signal by the communication means, operation control means for sending a control signal to the device by the communication means, and controlling operation of the device according to a predetermined control pattern; and The control state by the means is released for a predetermined period to be the control release state, and the power consumption in each of the control state and the control release state is extracted, and power reduction in the power load equipment is performed. Determining means for determining results, characterized by comprising a power charge calculation means for calculating a power rate to be reduced in response to the determined power reduction effect by the determining means.
[0021]
According to the present invention, the above-described power reduction system is applied to a power reduction system constructed by a business operator that gives a power reduction benefit to a customer who uses the power load equipment, so that a power rate is reduced for the customer. In addition to this, it is possible to realize a high value-added service capable of accurately judging the merits at that time.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the present invention is applied to a power rate reduction system constructed by a company that provides a service for reducing power rates to customers who use power load facilities such as stores and offices.
[0023]
FIG. 1 is a diagram illustrating an overall system configuration of a power reduction system according to the present embodiment. As shown in FIG. 1, a control terminal 10 for integrally controlling the operation of the entire system is connected to a telephone line 13 via a HUB 11 and a PBX 12, and a control unit 20 for controlling a power load facility of a customer. Is also connected to the telephone line 13. The control unit 20 is connected with a plurality of connection units 31, a single watt hour meter 32, and a plurality of devices 40 to be controlled. The control unit 20, together with the control terminal 10, plays a role as a monitoring unit, an operation control unit, a determination unit, and a power rate calculation unit of the present invention.
[0024]
In this embodiment, it is assumed that the power load equipment is divided into control units, and a plurality of control units 20 corresponding to each control unit can be connected to the telephone line 13. In other words, FIG. 1 illustrates only one control unit. However, by connecting the control units 20 each connected to a control unit including a plurality of devices 40 to the telephone line 13 in parallel, The device 40 can be a control target.
[0025]
In the above configuration, as the control terminal 10, a personal computer that can execute software for performing overall processing of the power reduction system may be used. The HUB 11 is a device that relays transmission and reception of data by the control terminal 10, and is connected to a communication interface of the control terminal 10. The PBX 12 is connected to the HUB 11 and functions as a private branch exchange in customer equipment. That is, the PBX 12 enables the exchange of various data between the control terminal 10 and the control unit 20 using the extension telephone network connected by the telephone line 13.
[0026]
On the other hand, the control unit 20 includes a communication unit 21, a basic unit 22, a power unit 23, and a plurality of relays 24. The communication unit 21 is connected to the telephone line 13 and controls communication when transmitting and receiving control data and the like to and from the control unit 20. The basic unit 22 is a unit that performs basic control on each device 40 to be controlled. The power unit 23 is a unit that controls the power to be supplied to each device 40 in accordance with the control by the basic unit 22 according to a predetermined control pattern.
[0027]
A plurality of relays 24 are connected to the power unit 23. By controlling the opening and closing of the relays 24, the on / off of the power supplied to each device 40 can be switched and output as needed. Each relay 24 is connected to a connection unit 32 provided outside the control unit 20. The connection unit 32 is a means for performing an interface between the control unit 20 and each device 40, and has a function of superimposing and transmitting data and power.
[0028]
The watt hour meter 32 constantly measures the amount of power supplied to all the devices 40 of the power load facility. The amount of power measured by the watt-hour meter 32 is transmitted to the basic unit 22 as digital data, and is used to calculate the amount of power used in the power load facility.
[0029]
Each device 40 is a device that requires power supply, such as an air conditioner or a freezer showcase, for example. FIG. 1 shows a case where each device 40 has a configuration including a motor 41 and a compressor 42. That is, the temperature is adjusted by rotating the motor 41 with the electric power supplied to each device 40 and thereby performing the compression operation of the compressor 42. Note that, as the device 40, various devices that require power supply, such as a lighting device, may be used.
[0030]
On the other hand, the power to the device 40 is supplied or cut off in accordance with the opening / closing control of the relay 24 in the control unit 20. The power supply to the device 40 is controlled according to a control pattern described later, and the operation and the pause are repeated. Information such as the operating state and temperature of the device 40 is sent to the control unit 20 via the connection unit 31 as a monitoring signal together with digital data corresponding to the above-mentioned power consumption. In the present embodiment, it is desirable to optimize the operation control of each device 40 according to the content of the acquired monitoring signal.
[0031]
With the above configuration, the operation control for a plurality (three in FIG. 1) of the devices 40 is performed by the control unit 20 based on the operation command of the communication terminal 10. Then, based on the amount of power measured by the watt hour meter 32, the amount of power used in the power load facility is analyzed. As described above, when the customer's power load facility includes a large number of devices 40 and includes a plurality of control units 20, each control unit may be controlled in the same manner, but may be controlled separately. It is possible.
[0032]
Although FIG. 1 shows a case where the telephone line 13 is used as the communication line of the present invention, the Internet may be used instead of the telephone line 13. As a result, it is possible to control the power load equipment of the customer via the versatile Internet, and it is possible to construct a more convenient power reduction system.
[0033]
Next, a control method in the power reduction system according to the present embodiment will be described. In the power reduction system according to the present embodiment, there are a case where a group of devices to be controlled is in a control state and a case where the control state is in a control release state where the control state is released. FIG. 2 is a diagram illustrating a control pattern when a group of devices to be controlled enters a control state or a control release state in the power reduction system.
[0034]
FIG. 2A shows an example of a control pattern when four devices 1 to 4 are to be controlled. In the present embodiment, operation control is performed on each of the devices 1 to 4 so as to switch between operation and suspension at a constant cycle. That is, as shown in FIG. 2A, an intermittent control pattern having a cycle Ton + Toff and repeating the operation time Ton and the pause time Toff is used. For example, in the case of an air conditioner, Ton = 8 minutes and Toff = 3 minutes may be set. It is assumed that the operation time Ton or the suspension time Toff in the control pattern can be set freely according to the characteristics of the device and the state of the power load equipment.
[0035]
In a state where the above-described control pattern is set, the relay 24 corresponding to the device to be controlled is controlled so that the power is turned on during operation and the power is turned off during suspension. For example, when the control target device is an air conditioner, an appropriate temperature can be maintained even if a relatively short pause time Toff is provided on the premise that the operation time Ton enough to cool the air is secured. As a result, it is possible to obtain a power reduction effect according to the ratio between the operation time Ton and the suspension time Toff, and accordingly, there is an advantage of reducing the power rate for the customer.
[0036]
In addition, as shown in FIG. 2A, in the operation control for each of the devices 1 to 4, the timings of the operation and the suspension are set to be shifted from each other. That is, if the power on / off of each of the devices 1 to 4 is controlled at the same timing, the peak of the power consumption increases, which is disadvantageous in terms of the power rate. Therefore, the peak of the power consumption is reduced by shifting the timing of operation and suspension. I am planning.
[0037]
On the other hand, FIG. 2B illustrates a case in which the operation control is not performed on the four devices 1 to 4 in a control release state. As shown in FIG. 2B, each of the devices 1 to 4 keeps operating continuously without a pause. Therefore, in the case of the control pattern of FIG. 2A in which each of the devices 1 to 4 intermittently suspends the operation, the power reduction effect is not obtained as compared with the case of the constant operation as in FIG. 2B. it is obvious.
[0038]
Here, it is desirable that the setting of the operation time Ton and the suspension time Toff in performing the operation control be appropriately determined according to the magnitude of the power reduction effect and the use environment. That is, if the ratio of the stop time Toff is relatively increased with respect to the operation time Ton, the power reduction effect is increased, but there is a possibility that the use environment is disadvantageous. However, considering the use environment of air conditioners and the like in stores and the like, it is usual that there is some allowance in the driving capacity, and even if all the air conditioners and the like are not always operated, a comfortable temperature can be maintained. Therefore, by setting appropriate control conditions such as operating the air conditioner at a ratio of about 70%, for example, the power reduction effect can be obtained while maintaining a favorable use environment.
[0039]
Next, a method of measuring the amount of power reduction by performing the above operation control in the power reduction system according to the present embodiment will be described. The power reduction amount or the power rate reduction merit obtained by the operation control using the control pattern of FIG. 2A is useful information for the customer. However, it is not always easy to actually determine such information. For example, it is possible to determine the merits of reducing the power rate by comparing the past power rate (for example, the power rate one year ago) when the above operation control is not performed with the current power rate. In some cases, a change in the equipment or a difference in the use environment may occur, and in such a case, a correct comparison cannot be made. Therefore, in the present embodiment, the method described below is adopted so that the customer can accurately determine the power reduction amount or the power rate reduction merit.
[0040]
FIG. 3 is a diagram illustrating a basic concept of a method of measuring the amount of power reduction in the power reduction system according to the present embodiment. The feature of the present embodiment is that the operation control is normally performed on the group of devices to be controlled so as to be in the control state, the control state is released at a predetermined timing, and the power rates of both are calculated and compared. is there. That is, in FIG. 3, during the control state in which the operation and the stop are periodically repeated in the control pattern shown in FIG. 2A, from the timing T1 to the timing T2, the control shown in FIG. After switching to the release state, control is performed to return to the original control state again. Although the example of FIG. 3 shows a case where two cycles of operation and suspension are set as the release time from the timing T1 to the timing T2, an appropriate time length is used as the release time in the control release state. Can be set and controlled.
[0041]
FIG. 4 is a diagram showing the amount of power consumption that changes in accordance with the state of FIG. In FIG. 4, the power consumption based on the measurement result of the watt hour meter 32 for the group of devices to be controlled is shown over time. The power consumption in each of the control state and the control release state may be obtained by calculating the total amount or average value of the power that changes as time passes within a certain time range. As shown in FIG. 4, the power consumption in the control release state is larger than the power consumption in the control state, and it is possible to calculate a specific power reduction amount by comparing the two. it can.
[0042]
In the present embodiment, the calculation of the power reduction amount shown in FIG. 4 is repeatedly executed at an appropriate sampling interval in order to accurately determine the power reduction effect according to the actual usage. Actually, since the power reduction effect of the power load equipment varies depending on the day of the week, the time zone, or the usage environment of the power load equipment, it is necessary to acquire as many samples as possible. For example, a sampling interval of several hours may be set in advance, and each time the sampling interval elapses from the previous control release state, the control may be set to the control release state, and the respective power reduction amounts may be calculated. The sampling interval may be fixed, but may be changed according to circumstances.
[0043]
Then, if the amount of power reduction is calculated using a large number of samples, it is possible to calculate the amount of reduction in the power fee obtained within a certain period. That is, using the power change shown in FIG. 4, the power rate in the case where the operation control according to the present embodiment is not introduced is estimated including the basic rate and the usage rate, and compared with the actually paid power rate. The merit of reduction can be accurately determined. Therefore, the present power reduction system is useful in that even if there is a change in equipment such as a customer's store or a difference in use environment, the power reduction effect can be accurately determined after eliminating these factors.
[0044]
Here, if the sampling interval for shifting to the control release state is shortened and each release time is lengthened, the calculation accuracy of the power reduction amount is improved. However, in this case, the ratio of the control release state to the operation time of each device relatively increases, and the time period in which the operation control of the present embodiment is performed is reduced, so that the power reduction effect is reduced. That is, it is desirable that the sampling interval and the release time for shifting to the control release state be appropriately determined in consideration of the balance between the calculation accuracy of the power reduction amount and the power reduction effect.
[0045]
Next, a specific example of operation control in the above power reduction system will be described. FIG. 5 is a graph showing a simulation result when the measurement of the power reduction amount according to the present invention is applied based on a predetermined condition. That is, a standard condition assuming a specific store such as a supermarket is given, and a change in power consumption in one day in summer is calculated by simulation and plotted in FIG.
[0046]
In FIG. 5, it is assumed that the control pattern is such that the operation time is Ton = 8 minutes, the stop time Toff = 3 minutes, and the operation is repeatedly performed at a cycle of 11 minutes in total. Then, the control is performed so that the control state for five cycles and the control release state for one cycle are alternately shifted in six consecutive cycles (66 minutes). The store to be simulated is assumed to be open from 6:30 to 22:00 during the hours from 0:00 to 24:00. In this case, the trend of the power consumption in one day increases or decreases according to the temperature change during the business hours, and changes so as to maintain a predetermined minimum value outside the business hours.
[0047]
In FIG. 5, the power consumption accumulated in one cycle is sequentially plotted for each cycle in correspondence with one vertical line, and the power consumption in the control state and the power consumption in the control release state are separately shown. That is, five power consumptions in the control state and one power consumption in the control release state are alternately plotted. In this case, in the measurement of the power reduction amount, this corresponds to a condition that the sampling interval is 66 minutes and the release time is 11 minutes. Note that the actual power consumption in each cycle can be obtained by, for example, integrating measurement data acquired at a one-second pitch.
[0048]
Here, the electric power consumption of all plots (black circles and white squares) shown in FIG. 5 corresponds to the transition of the actual electric power consumption of the store in one day. On the other hand, in FIG. 5, the envelope connecting only the plots (black circles) of the control state represents the transition of the power consumption when it is assumed that the control state is always maintained and the control is not shifted to the release state. In FIG. 5, an envelope connecting only the plots (white squares) of the control release state represents a transition of the power consumption when it is assumed that the control release state is always maintained and the power reduction itself is not performed.
[0049]
In this case, it can be confirmed that the envelope connecting only the plots in the control state is smaller than the envelope connecting only the plots in the control release state by the amount of power reduction that can be secured. However, since this is a virtual condition, when the method of measuring the amount of power reduction according to the present invention is applied, a slight loss of the amount of power reduction actually occurs. That is, the actual power consumption is slightly larger than the envelope connecting only the plots of the control state, in accordance with the degree of transition to the control release state. According to the conditions of this simulation, the transition to the control release state is performed at a ratio of 11 minutes out of 66 minutes, so that about 5/6 of the power reduction amount that can be ensured ideally is the actual power reduction amount. Is equivalent to
[0050]
Next, a specific example in which the application of the operation control in the above-described power reduction system is changed on a monthly basis will be described. FIG. 6 is a diagram illustrating a specific example of a case where the power reduction amount is measured based on the above-described condition only on a predetermined date in a month for the same store as in FIG. In FIG. 6, it is assumed that the power reduction amount is measured only once every three days within a predetermined month. That is, the control state is always maintained for two days, and the measurement of the power reduction amount according to the present invention is not performed, and the transition of the control state and the control release state as shown in FIG. The power reduction amount is measured, the same pattern is continued until the end of the month, and the power usage amount on each date is plotted in FIG.
[0051]
In FIG. 6, a plot (circle) of a date for maintaining the normal control state without applying the measurement of the power reduction amount according to the present invention as the power consumption amount during the month in the store, and the power reduction amount according to the present invention. The plots (squares) of dates for transitioning between the control state and the control release state by applying the measurement of (1) are connected by solid lines, and the transition of the month is shown in a graph. Further, on the date to which the measurement of the power reduction amount of the present invention is applied, a plot (triangle) assuming that the control release state is always maintained as described above is also shown.
[0052]
In this case, assuming an envelope connecting the triangular plots shown in FIG. 6, it is larger than the solid line graph, and it can be confirmed that the amount of power reduction can be secured accordingly. On the other hand, the square plot is slightly larger than the circle plot shown in FIG. 6, and it can be seen that a slight loss of the power reduction amount occurs as described above. In the example of FIG. 6, the power reduction amount according to the present invention is measured only once every three days. Approximately 1/18 obtained by multiplying 6 by 1/3 corresponds to a substantial power reduction loss per month.
[0053]
Thus, by referring to specific graphs as shown in FIGS. 5 and 6, it is possible to visually grasp the power reduction effect in the power reduction system. Accordingly, the present invention is useful in that a large incentive can be given when a customer introduces the present power reduction system.
[0054]
The present invention described above can be variously modified without being limited to the above embodiments. For example, in the above-described embodiment, the case where the amount of reduction in the electricity rate for the customer is calculated or the case where the business operator provides the service to the customer has been described. However, the present invention can be applied without being limited to such a situation. It is. In other words, even in a case where a company operates power load facilities using its own power generation facilities and does not require payment of a power fee, if it is necessary to reduce power consumption, the present invention Is effective.
[0055]
Further, in the above-described embodiment, the case where the operation control for the device 40 is performed using the specific control pattern has been described. However, the present invention is not limited to this. The operation control may be performed by selecting the control pattern described above.
[0056]
Taking the case where the present invention is applied to an air conditioner as an example, the output of a temperature sensor that constantly measures the outside air temperature is monitored, and the measurement result of the temperature is fed back to select a control pattern used in the basic unit 20 as follows. I do. For example, in the cooling operation of the air conditioner, when the temperature is set to 35 ° C. or more in a state where Ton = 8 minutes and Toff = 3 minutes, the control pattern is changed and Ton = 12 minutes and Toff = 3 minutes. Or when the temperature becomes 25 ° C. or more and less than 30 ° C., the original setting patterns Ton = 8 minutes and Toff = 3 minutes can be returned. That is, the control pattern in which the ratio of the operation time becomes relatively high when the temperature becomes high is selected, and the operation of the air conditioner is finely adjusted so as to suppress the influence of the temperature change.
[0057]
It is effective to change the control pattern depending on the store or region where the power reduction system is introduced. However, as described above, by feeding back the measured temperature, selecting an appropriate control pattern and making fine adjustments In addition, it is possible to maintain the quality of the air conditioner stably, and to provide the flexibility to maximize the degree of rationalization by reducing power as much as possible.
[0058]
Further, taking the case where the present invention is applied to a frozen showcase as an example, the output of a temperature sensor disposed inside the frozen showcase is monitored, and the temperature is kept within a predetermined range as in the case of the air conditioner described above. At the same time, an optimal control pattern is selected to minimize the power consumption. Specifically, in the operation of the refrigerated showcase, the standard control pattern is assumed to be Ton = 25 minutes, Toff = 8 minutes, and the actual measured temperature is always less than 3 ° C. with respect to the set temperature upper limit of 5 ° C. In this case, the control pattern may be changed so that Ton = 25 minutes and Toff = 10 minutes. In this case, when the measured temperature of the frozen showcase increases, the ratio of the operation time becomes relatively low.
[0059]
Further, when the actual measured temperature exceeds the upper limit of 5 ° C. of the set temperature, it is sufficient to immediately stop the periodic switching between the operation and the suspension and shift to the mode in which the operation is always continued. Thereafter, a control pattern having a higher operation time ratio than the set control pattern may be selected and the setting may be changed. Thereby, the operation can be stably performed while suppressing the influence of the temperature change in the freezing showcase.
[0060]
Further, in the above-described embodiment, the transition from the control state to the control release state is premised to measure the power reduction amount of the device to be controlled in the power reduction system. Alternatively, it may be possible to cancel as necessary. In other words, if the customer who introduced the power reduction system measures the power reduction effect and fully understands the merits, it is determined that the measurement of the power reduction effect is not necessary thereafter, and the power consumption loss It is realistic to be able to cancel the transition to the control release state in order to minimize. INDUSTRIAL APPLICABILITY The present invention is useful in that it can be applied when it is necessary for a customer to determine the power reduction effect in a power reduction system.
[0061]
Further, in the above-described embodiment, the mode in which the PBX 12 connected to the telephone line 13 is used as the communication means in the power reduction system has been described, but various communication means can be used without being limited to this. For example, the communication unit may be realized by a mode using a router connected to a network. As a result, the versatility of the power reduction system of the present invention can be improved by matching with the existing network technology.
[0062]
【The invention's effect】
As described above, according to the present invention, at the time of operation control of the equipment included in the power load equipment, the power reduction effect is determined by extracting the power consumption of each of the control state and the control release state of each equipment. Therefore, the power reduction effect can be determined with high accuracy, and the merit based on the power reduction system can be accurately recognized.
[Brief description of the drawings]
FIG. 1 is a diagram showing a system configuration of an entire power reduction system according to an embodiment.
FIG. 2 is a diagram illustrating a control pattern when a group of devices to be controlled enters a control state or a control release state in the power reduction system.
FIG. 3 is a diagram illustrating a basic concept of a method of measuring a power reduction amount in the power reduction system according to the present embodiment.
FIG. 4 is a diagram illustrating the amount of power consumption that changes in accordance with the state of FIG. 3;
FIG. 5 is a graph showing a simulation result when the measurement of the amount of power reduction according to the present invention is applied based on a predetermined condition.
FIG. 6 is a diagram illustrating a specific example of a case where the power reduction amount is measured based on a predetermined condition only on a predetermined date of a month.
[Explanation of symbols]
10 ... Control terminal
11 ... HUB
12 ... PBX
13 ... Telephone line
20 ... Control unit
21 ... Communication unit
22 Basic unit
23 ... Power unit
24 ... Relay
31 ... Connection
32 ... Watt hour meter
40 ... Equipment
41 ... Motor
42 ... Compressor

Claims (8)

A power reduction system that controls power load equipment including one or more devices to which power is supplied, and reduces power consumption of the power load equipment,
Communication means for transmitting and receiving a predetermined signal to and from the device via a communication line,
Monitoring means for monitoring the operating state and power consumption of the device, and collecting the obtained monitoring signal by the communication means,
An operation control unit that sends a control signal to the device by the communication unit and controls operation of the device according to a predetermined control pattern.
A control unit that releases the control state by the operation control unit for a predetermined period to a control release state, extracts the power consumption of each of the control state and the control release state, and determines a power reduction effect in the power load facility; ,
A power reduction system comprising: 2. The power reduction system according to claim 1, further comprising a power rate calculation unit configured to calculate a power rate to be reduced according to the power reduction effect determined by the determination unit. 3. 2. The power reduction system according to claim 1, wherein the operation control unit performs operation control by alternately switching on / off of the device at a predetermined cycle. 3. The power reduction system according to claim 1, wherein the determination unit sets the control release state at a preset sampling interval and release time. The determination unit alternately shifts the control state for M (integer) cycles and the control release state for N (integer) cycles with respect to a predetermined cycle of the device. The power reduction system according to claim 3, wherein the power consumption is integrated and extracted. The determination means performs the transition between the control state and the control release state on a predetermined date of the month, and keeps only the control state on other dates, and reduces the power consumption within each date. The power reduction system according to claim 3, wherein the integration is performed. The power reduction system according to claim 1, wherein the operation control unit selects an optimal control pattern from a plurality of control patterns based on the monitoring signal. A business operator providing a service to a customer who uses a power load facility including one or a plurality of devices to be supplied with power, controls the power load facility to provide the customer with a benefit of reducing a power rate. The system
Communication means for transmitting and receiving a predetermined signal to and from the device via a communication line,
Monitoring means for monitoring the operating state and power consumption of the device, and collecting the obtained monitoring signal by the communication means,
An operation control unit that sends a control signal to the device by the communication unit and controls operation of the device according to a predetermined control pattern.
A control unit that releases the control state by the operation control unit for a predetermined period to a control release state, extracts the power consumption of each of the control state and the control release state, and determines a power reduction effect in the power load facility; ,
Power rate calculating means for calculating a power rate to be reduced corresponding to the power reduction effect determined by the determining means,
A power reduction system comprising:

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