JP2000078748A - Power dsm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a power DSM system being requested peak power reduction from a power company in which an appropriate incentive is paid to a consumer cooperated for peak power reduction at the sacrifice of comfortableness, convenience and the like. SOLUTION: The a power DSM system comprises means 13b for determining a power limit value of a consumer unit 13 connected through a communication line with a center terminal 15 (or a WHM 11) of power company when power reduction is requested, and means 13c for controlling the load of consumer according to the limit value wherein an appropriate incentive can be obtained at the center terminal (or a WHM 11) by informing the limit value thereto. Furthermore, the consumer unit 13 is provided with a pattern operation memory means in order to perform load control automatically to a consumer cooperated for power reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power DSM (Demand Side Ma
power D that appropriately implements load control and incentives for load reduction.
It concerns the SM system.

[0002]

2. Description of the Related Art FIG.
Is a conventional demand control system disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-26095.
A conventional demand control system determines a target power based on a contract power set between a customer and a power company, sets the target power in a customer device, and the power consumption in the customer determines the set value. When there is a possibility of exceeding, the equipment in the customer is controlled so as to avoid the excess according to the priority set in the customer device in advance.

In FIG. 6, 1 is a customer device, 2 is a power line, 3 is a load group (L1 to L3: each device), 4 is a power monitor unit, 5 is a judgment unit, 6 is a setting unit, and 7 is a priority order. Setting means, 8 is target power value setting means, 9 is area setting means, 10
Is a control signal output unit, and the priority order setting means 7 sets the priority order of each device of the load group in the customer as shown in FIG.

Next, the operation will be described. The customer sets the target power value using the target power value setting means 8 of the customer device 1 based on the contract power set with the power company. In addition, one or a plurality of loads L1 to L
3 is selected and set by designating the priority. FIG. 7 is a table showing the contents in which the priorities are set.
The priority is set so that FF is performed first, and then L2 is turned off and then L3 is turned off. When the setting of the priority order and the setting of the target power value are performed, respectively, the target power value is apportioned by the number of priorities by the area setting means 9, and the apportioned point and the target electric power value after the elapse of the demand time period are compared. By tying together, an area corresponding to the number of priorities is created.

Next, when it is judged by the judging section 5 that the total used power value of the load group measured by the power monitoring section 4 has entered the area set by the area setting means 9, control is performed in accordance with the priority order. The operation state of the load is controlled by outputting a control signal of the operation state to each load by the signal output means 10. As a result, the total power consumption in the consumer is controlled so as to be within the set value, so that the peak of the power can be suppressed.

[0006]

In the conventional demand control system, it is assumed that a target power value is determined for the purpose of not exceeding a contract power with a power company and a load in a customer is controlled. , Was a closed system within the customer. However, in recent years, with respect to an increase in power demand, attention has been paid to improvement of the load factor also from the viewpoint of environmental problems, and it is expected that a demand for a power company to reduce power consumption during peak hours for a customer. . In such a system, some economic benefits would be available to the cooperating customers, as they would reduce peak power consumption at the expense of comfort, convenience, etc. Need to be paid. This is called an incentive from suppliers to consumers. However, since the conventional demand control system is configured as described above, there is a problem that an appropriate incentive cannot be received because the load control is performed by closing the demand control system inside the customer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has suppressed the load in a customer in response to a request for reduction of power consumption during peak power hours, and has cooperated with the reduction of power consumption. The purpose is to obtain a power DSM system in which consumers are paid appropriate incentives.

[0008]

SUMMARY OF THE INVENTION An electric power DS according to the present invention.
The M system includes a watt hour meter that measures the power consumption of the customer and a customer device that controls a load group of the customer. The customer device is configured to measure the amount of power used during a reduction period of the power consumption. Limit value determination means for determining a limit value, watt hour meter communication means for notifying the determined watt-hour to the watt-hour meter, and load control means for controlling the load in the customer within the range of the limit value, The watt-hour meter includes a customer device communication unit that receives a limit value notified from the customer device, and an adjustment unit that adjusts measurement of power consumption in a reduction time zone according to the limit value. It is characterized by the following.

[0009] Further, it is installed on the power supply side and connected to the watt-hour meter via a communication line to transmit a reduction request and a reduction request amount of power consumption to the watt-hour meter. A center terminal comprising: customer communication means for receiving the limit value from the power meter via the watt-hour meter; and incentive determination means for determining an incentive for the customer in accordance with the limit value for the requested amount of power consumption reduction. And the power meter further includes a center terminal communication means for receiving transmission information from the center terminal and transmitting a limit value notified from the customer device to the center terminal. It is assumed that.

[0010] The customer device may further comprise a pattern operation storage means for setting and storing one or more operation patterns of the customer, and the limit value determining means may be configured to determine the pattern based on an input from the customer. An operation pattern is selected from the operation storage means, a limit value is determined in accordance with the selected operation pattern, and the load control means controls a load in the customer in accordance with the operation pattern. Is what you do.

Further, the customer device includes a load operation input means for operating a load of the customer, and an operation input by the load operation input means at the time of selecting an operation pattern from the pattern operation storage means. Pattern driving learning means for correcting and learning the driving content of the driving pattern based on the driving pattern, wherein the load control means controls a load in the customer according to the learned driving pattern. is there.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram showing a power DSM system according to Embodiment 1 of the present invention. 1, the same parts as those of the conventional example shown in FIG. 6 are denoted by the same reference numerals, and the description thereof will be omitted. As a new code, reference numeral 11 denotes a watt hour meter for measuring the amount of power used by the customer, which is used according to a limit value from the customer device 13 and a customer device communication means 11a for communicating with a customer device 13 described later. Adjustment means 11b for adjusting the measurement of the power consumption during the power reduction time zone is incorporated.

Reference numeral 13 denotes a customer device for controlling the consumer's load group 3 connected to the watt hour meter 11 via the communication line 12, and a watt hour meter communication means 1 for communicating with the watt hour meter.
3a, limit value determining means 13b for determining a limit value of power consumption in a customer used during a power consumption reduction time zone,
Load control means 13c for controlling the load in the customer within the range of the limit value is incorporated.

Next, the operation will be described. First, the electric power company requests each customer to reduce the electric power consumption during the peak time of the total electric power demand. Since the time period of the normal peak is statistically clear, in this embodiment, the reduction time period and the reduction request amount to the customer are set in the wattmeter 11 or the customer device 13 in advance. Assume that Here, it is assumed that these are set in watt hour meter 11.

The watt hour meter 11 notifies the customer device 13 via the communication line 12 of the power reduction request and the reduction amount when the reduction time period is reached. In the customer device 13, the reduction request is received by the wattmeter communication unit 13a, and is input to the limit value determination unit 13b. Limit value determining means 13b
Then, the limit value of the power consumption is determined according to the current situation in the customer.

The determination of the limit value is performed, for example, by the following method. First, as a first method, based on the current operating load in the customer, the amount of electric power used, the number of residents, etc., the amount of electric power used when driving with the minimum load that does not impair convenience and comfort as much as possible is calculated. The maximum value of the power consumption is calculated, and this is set as a limit value. Alternatively, as a second method, the current operating load in the customer, the amount of power used, the number of occupants, etc. are considered, and the customer considers the predetermined level of convenience and sacrifice of comfort, and Calculate the maximum value, use this as the limit value, and give priority to obtaining incentives from power companies over sacrifice. Alternatively, as a third method, the reduction amount from the watt-hour meter 11 is received as it is, and the maximum value of the power consumption is calculated and set as the limit value.

In realizing these methods, information such as the operation status of each load and the amount of electric power used is transmitted from the load group 3 to the customer via the control line 5 by, for example, power line carrier communication using the power line 2. It is generally known that the information is collected by the device 13, and information can be collected. Therefore, the description is omitted here.

When the customer device 13 determines the limit value of the power consumption in the customer by the limit value determining means 13b,
This is notified to the watt-hour meter 11 via the communication line 12 by the watt-hour meter communication means 13a. Further, the determined limit value is input to the load control means 13c. Load control means 13c
Controls such that the operation of the load group 3 in the customer is performed within the range of the limit value. As a control method of the load group 3 at this time, an operation method according to a preset priority order of each load, as shown in the conventional example, with this limit value as a target power value, can be considered. For this,
Detailed explanation is omitted.

Next, the watt hour meter 11 having received the notification of the limit value
Receives this by the customer device communication means 11a,
Input to the adjusting means 11b. The adjusting means 11b adjusts the meter of the power consumption of the customer based on the limit value notified by the customer as an incentive to cooperate with the peak suppression. In other words, the amount of reduction requested by the consumer is compared with the limit value, and the amount of power during the reduction time period is measured so as to be discounted in accordance with the ratio to the degree of cooperation. For example, the adjusting means 11b is provided with a variable speed device for the weighing counter of the watt hour meter 11, and during the reduced time period, the variable speed device makes the weighing counter slower than the normal speed. Therefore, in this reduced time period, the weighed value is reduced, and the power rate is thereby reduced.

In this configuration, in order to simplify the description, the customer device communication means 11a and the adjusting means 11b are provided by improving the watt-hour meter 11, but these are, of course, provided separately from the watt-hour meter 11. It is also possible to use a conventional watt-hour meter.

As described above, in the first embodiment, the customer device 13 notifies the watt-hour meter 11 of the limit value of the electric power used in the customer during the power reduction time period. Based on the limit value, the power metering is configured to be discounted according to the degree of cooperation with the reduction request, so the power metering is discounted according to the rate at which the customer cooperated with the reduction during peak power hours, and as a result, Since the electricity rate is reduced, it is possible to receive an appropriate incentive according to the degree of cooperation in reducing power consumption.

Embodiment 2 FIG. In Embodiment 1 described above, watt hour meter 11 or customer device 13
The power reduction time zone and the amount of demand for reduction are set for the customer, but these are then sent from the power company's center terminal according to the power demand. An embodiment corresponding to the case will be described.

FIG. 2 is a configuration diagram of a power DSM system according to the second embodiment in such a case. In FIG.
The same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. As a new code, reference numeral 15 denotes a center terminal installed on the power supply side and connected to the customer's watt-hour meter 11 via the communication line 14 for communicating with the customer's watt-hour meter 11. Customer communication means 15
a and an incentive determining means 15b for determining an incentive for the customer in accordance with the limit value for the required amount of reduction in power consumption. Reference numeral 11c denotes a center terminal communication unit provided in the watt-hour meter 11.

Next, the operation will be described. First, the electric power company requests each customer to reduce the electric power consumption during the peak time of the total electric power demand. In the second embodiment, the power company monitors the power demand one by one, and in the time period when the power peak of the day is expected, the power company sends the demand to the customer communication means 15.
A notification of the power consumption reduction request and the reduction request amount is sent via the communication line 14 by a. The notification frequency of these requests may be notified once a day, multiple times, or weekly, monthly, or seasonally. The communication line 14
It is assumed that, in addition to public telephone networks such as general telephone lines, broadcasting networks such as satellite broadcasting and CATV are used.

In the watt-hour meter 11, this is received by the center terminal communication means 11c and notified to the customer equipment 13 via the communication line 12 by the customer equipment communication means 11a. In the customer device 13, the reduction request is received by the wattmeter communication unit 13a, and is input to the limit value determination unit 13b. The limit value determining means 13b determines the limit value of the power consumption according to the current situation in the customer. A method similar to that of the first embodiment can be used to determine the limit value, and the description is omitted here.

When the customer device 13 determines the limit value of the power used in the customer by the limit value determining means 13b,
This is notified to the watt-hour meter 11 via the communication line 12 by the watt-hour meter communication means 13a. Further, the determined limit value is input to the load control means 13c. Load control means 13c
Controls the operation of the load in the consumer to be performed within the range of the limit value. A method for controlling the load at this time may be the same as in the first embodiment, and a description thereof will be omitted.

Next, the watt hour meter 11 having received the notification of the limit value
Receives this by the customer device communication means 11a,
It is input to the center terminal communication means 11c. The center terminal communication unit 11c notifies the limit value to the center terminal 15 via the communication line 14. At this time, the aforementioned communication line 1
In the case where 4 is a satellite broadcast or the like, a communication line 14 such as a public line for separately notifying the information of each customer to the center terminal 15.
Is required.

In the center terminal 15, the customer communication means 1
The limit value from the consumer is received by 5a, and this is input to the incentive determining means 15b. The incentive determining means 15b determines an incentive for cooperation in suppressing the peak based on the limit value notified by the customer. That is, the amount of reduction requested by the customer is compared with the limit value, and the electricity rate of the customer is discounted according to the ratio to the degree of cooperation.

In this configuration, the customer device communication means 11a and the center terminal communication means 11c are provided by improving the watt-hour meter 11 to simplify the description. Separately, a supplier device,
As the watt hour meter 11, a conventional watt hour meter can be used. Further, the center terminal communication means 11 is connected to the customer device 13.
c, and may be directly connected to the center terminal via the communication line 14.

As described above, in the second embodiment, the customer device 13 notifies the center terminal 15 of the power company via the communication line 14 or the like to the limit value of the power used in the customer during the power reduction time period. Since the center terminal 15 is configured to discount the power rate according to the degree of cooperation with the reduction request based on the limit value, the power rate is reduced according to the rate at which the customer cooperated with the reduction during the power peak time. Depending on the degree of cooperation in reducing power consumption,
You can receive more appropriate incentives. Further, since the power company can grasp the limit value of each customer, there is an advantage that the peak can be surely suppressed and the amount of generated power can be adjusted. Also, since it is connected to the center terminal, a reduction request is issued only when power reduction is really necessary. However, there is an advantage that the power company can take a power reduction measure without incurring unnecessary costs or paying unnecessary incentives.

Embodiment 3 In contrast to the first and second embodiments, the third embodiment shows an embodiment relating to a method of controlling the load in the customer device 13. FIG.
9 shows a power DSM system according to the third embodiment, and shows another configuration of the customer device 13 in the first and second embodiments. 3, the same parts as those in the first and second embodiments shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof will be omitted. As a new code, 13d is a pattern operation storage unit provided in the customer device 13 for setting and storing a customer operation pattern, and the limit value determination unit 13b is based on an externally provided input from the customer. The operation pattern is selected from the pattern operation storage means 13d, and the limit value is determined in accordance with the selected operation pattern. The load control means 13c controls the load group 3 in the customer in accordance with the operation pattern. It has been made to be.

Next, the operation will be described. Up to the point where any reduction request and reduction amount from the power company are input to the customer device 13 and received by the watt hour meter communication means 13a, the same as in either the first embodiment or the second embodiment Therefore, the description is omitted here. The limit value determination unit 13b selects an operation pattern from the pattern operation storage unit 13d based on an externally provided input from a consumer, and determines a limit value in accordance with the selected operation pattern.

On the other hand, the pattern operation storage means 13d has
Several in-consumer driving patterns corresponding to the in-consumer situations are set in advance. Here, the operation pattern will be described. The operation pattern is a pattern of the load operation in the customer which is set in advance by the customer according to the situation of the customer, and shows an example as shown in FIG. 4, for example. In FIG. 4, first, the savings pattern is a pattern that seeks the maximum incentive as much as possible by cooperating with the reduction request from the power company.
This is such that the operation of lighting and the like is stopped, and only the minimum necessary operation of the refrigerator and the like is performed. Next, the saving comfort pattern is to cooperate with the reduction of power consumption while securing the minimum comfort and convenience. For example, if it is an air conditioner,
The temperature is raised by 2 ° C. during cooling, and the lighting is operated with 50% dimming. Further, in the comfort pattern, for example, the priority is given to comfort and convenience by a visitor or the like, and coordination is not performed for reduction of power consumption, and load control from the customer device is not performed.

In the example shown in FIG. 4, the saving comfort pattern is currently selected by the customer. Therefore, the limit value determining unit 13b determines the limit value as 50% of the power usage limit value that can be maximized, and notifies the watt hour meter 11 via the watt hour meter communication unit 13a. If the saving pattern is selected by the customer, the limit value is similarly determined as 100% of the maximum power consumption limit value that can be taken,
The power meter 11 is notified via the power meter communication means 13a.

The subsequent operation of the watt hour meter 11 having received the notification of the limit value from the customer device 13 is the same as the operation of either the first embodiment or the second embodiment. Omit. Further, the load control unit 13c controls the load group 3 according to the load control content stored in the operation pattern selected in the pattern operation storage unit 13d.

As described above, in the third embodiment, in the customer device 13, the limit value of the power consumption in the customer during the power reduction time period is determined according to the operation pattern selected and set in advance by the customer. For this reason, for example, saving is prioritized during normal times, but it is possible to select such as giving priority to comfort and convenience in unusual situations such as when visiting customers,
The customer can receive an appropriate incentive, and at the same time, can obtain a more convenient power DSM system.

Embodiment 4 FIG. In contrast to Embodiment 3 described above, Embodiment 4 shows another embodiment relating to a method of controlling the load in the customer device 13. FIG. 5 shows a power DSM system according to the third embodiment, and shows another configuration of the customer device 13. In FIG.
The same parts as those of the third embodiment shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. 13e as a new code
And 13f are the customer devices 1 provided in the customer device 13.
3 is a load operation input means for the consumer to operate the load controlled by 3 and a pattern operation learning means for learning and changing the contents of the pattern operation based on the operation of the consumer inputted by the load operation input means 13e. The load control means 13c controls the load group 3 in the customer according to the learned driving pattern.

Next, the operation will be described. Up to the point where the power reduction request and the reduction amount from the power company are input to the customer device 13 and received by the watt-hour meter communication means 13a, the operation is the same as in the third embodiment, and the description is omitted here. I do.

Further, the description of the setting contents and the selection contents in the pattern operation storage means 13d is the same as that of the third embodiment, so that the description is omitted. Now, it is assumed that the customer is currently selecting a comfortable pattern for saving as shown in FIG. However, for the consumer, the comfort under load-controlled operation with a saving of 50% is significantly impaired (for example, the user feels hot and uncomfortable, especially because the outside air is high and the humidity is high), or the convenience is impaired. In the case of darkness due to cloudy weather, the consumer operates the load using the load operation input means 13e (lowering the temperature setting of the air conditioner, increasing the illuminance of the lighting, etc.) to eliminate the discomfort. Make it possible.

The customer device 13 stores these inputs by means of the pattern driving learning means 13f. For example, if the customer's discomfort continues to be large at a saving degree of 50% as shown in FIG. By reducing the degree of saving of the comfort pattern to, for example, 40%, an optimum saving comfort pattern for the customer is generated and stored again in the pattern operation storage means 13d. Also, the operation contents of the load are similarly corrected (for example, the set temperature is increased by 1 ° C., the illuminance is set to 70%).

The pattern driving learning means 13f automatically generates optimum driving pattern contents by taking into account environmental conditions such as the outside air temperature and illuminance of the day in addition to the contents of the load operation by the customer. Accordingly, it is possible to eliminate the burden of inputting the load operation of the consumer.

Although the load operation input means 13e is provided in the customer device 13 in the fourth embodiment, the load operation result information is transmitted via the control line 5 by using ordinary load operation means such as a remote controller of an air conditioner. It is also possible to obtain by transmission from each load.

The limit value determining means 13b determines a limit value based on the saving degree thus reset, and notifies the watt hour meter 11 via the watt hour meter communication means 13a. The subsequent operation of the watt-hour meter 11 that has received the notification of the limit value from the customer device 13 is the same as the operation of either the first embodiment or the second embodiment, and the description is omitted here. Similarly, the load control unit 13c controls the load group 3 according to the load control content stored in the operation pattern selected in the pattern operation storage unit 13d.

As described above, in the fourth embodiment, the customer device 13 determines the limit value of the power consumption in the customer during the power reduction time period according to the operation pattern selected and set in advance by the customer. In addition, since the contents of the driving pattern are automatically learned and corrected by the load operation input means 13e and the pattern driving learning means 13f, the comfort and convenience can be adjusted according to the customer's will without significantly impairing the comfort and convenience. By determining and notifying the appropriate limit value, the consumer can receive an appropriate incentive, and at the same time, can obtain a more convenient power DSM system.

[0045]

As described above, the power DS according to the present invention is
According to the M system, by notifying the limit value of the power used by the customer to the watt hour meter or the center terminal of the power company, the customer can take appropriate action corresponding to the sacrifice incurred by restricting the use of the load. There is an effect that an incentive can be obtained.

Further, by connecting the center terminal to the customer, a more detailed power reduction request can be made.
It is possible to obtain more appropriate incentives. In other words, since a reduction request is issued only when power reduction is truly necessary from the power company's center terminal, consumers are not required by reducing power consumption more than necessary, especially when power reduction is not necessary. The effect is that power saving measures can be taken without sacrificing or paying unnecessary incentives by the power company. Further, since the power company can grasp the limit value of each customer, there is an effect that the peak can be surely suppressed and the amount of generated power can be adjusted.

Further, since the limit value of the power consumption in the customer during the power reduction time zone is determined according to the operation pattern selected and set by the customer in advance, for example, saving is prioritized in normal times, but non-use times such as when customers come in are determined. Under normal circumstances, it is possible to make a choice such as giving priority to comfort and convenience, so that consumers can receive appropriate incentives, and at the same time, it is possible to obtain a more convenient power DSM system. There is.

Further, in addition to determining the limit value of the electric power use according to the operation pattern selected and set in advance by the consumer, the load operation of the consumer is learned and the contents of the pattern operation are automatically corrected. Therefore, by determining and notifying the appropriate limit value according to the customer's will without significantly impairing comfort and convenience, the customer can receive appropriate incentives and at the same time, more convenient electric power There is an effect that a DSM system can be obtained.

[Brief description of the drawings]

FIG. 1 shows power DSM according to Embodiment 1 of the present invention.
It is a block diagram showing a system.

FIG. 2 shows power DSM according to Embodiment 2 of the present invention.
It is a block diagram showing a system.

FIG. 3 shows power DSM according to Embodiment 3 of the present invention.
It is a block diagram showing a system.

FIG. 4 is a diagram showing the contents of an operation pattern of the power DSM system according to the present invention.

FIG. 5 shows power DSM according to Embodiment 4 of the present invention.
It is a block diagram showing a system.

FIG. 6 is a configuration diagram showing a conventional power DSM system.

7 is an explanatory diagram of the priority order of each device of a load group within a customer set in the priority order setting means 7 of FIG. 6;

[Explanation of symbols]

11 watt-hour meter, 3 load groups, 13 customer equipment, 13
b Limit value determination means, 13a Watt hour meter communication means, 13
c load control means, 11a customer device communication means, 11
b adjustment means, 15 center terminal, 15a customer communication means, 15b incentive determining means, 11c center terminal communication means, 13d pattern operation storage means, 1
3e Load operation input means, 13f Pattern driving learning means.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G064 AC06 AC08 CB11 DA01 5G066 KA01 KA11 KD04 KD10 5K048 BA32 DC03 EB02 EB10 HA01 HA02 5K101 KK11

Claims (4)

[Claims] 1. An electricity meter for measuring the power consumption of a customer, and a customer device for controlling a load group of the customer, wherein the customer device has a power amount used during a time period for reducing power consumption. Limit value determining means for determining the limit value, a watt hour meter communication means for notifying the watt-hour meter of the determined limit value, and load control means for controlling the load in the customer within the range of the limit value. The watt-hour meter includes customer device communication means for receiving the limit value notified from the customer device, and adjusting means for adjusting the measurement of power consumption in the reduction time zone according to the limit value. A power DSM system comprising: 2. The power DSM system according to claim 1, wherein said power DSM system is installed on a power supply side and connected to said watt-hour meter via a communication line, and requests the watt-hour meter to reduce power consumption. Consumer communication means for transmitting the reduction request amount and receiving the limit value from the customer device via the watt-hour meter, and providing an incentive for the customer in accordance with the limit value for the power consumption reduction request amount. The power meter further includes a center terminal having incentive determining means for determining, and the watt hour meter receives transmission information from the center terminal and transmits a limit value notified from the customer device to the center terminal. A power DSM system further comprising a center terminal communication means. 3. The power DSM system according to claim 1, wherein the customer device further includes a pattern operation storage unit that sets and stores one or more operation patterns of the customer, and wherein the limit value determination is performed. The means selects an operation pattern from the pattern operation storage means based on an input from a consumer, determines a limit value corresponding to the selected operation pattern, and the load control means corresponds to the operation pattern. A power DSM system characterized by controlling a load in a consumer by using the power DSM. 4. The electric power DSM system according to claim 3, wherein the customer device includes a load operation input unit for operating a load of the customer, and a selection operation of an operation pattern from the pattern operation storage unit. Pattern operation learning means for correcting and learning the operation content of the operation pattern based on the operation input by the load operation input means, wherein the load control means A power DSM system for controlling a load.