WO2013069619A1

WO2013069619A1 - Energy management device

Info

Publication number: WO2013069619A1
Application number: PCT/JP2012/078684
Authority: WO
Inventors: 昌史村上; 敏章中尾; 浩基數野; 知也十河; 前田　龍一; 徹下間
Original assignee: パナソニック株式会社
Priority date: 2011-11-07
Filing date: 2012-11-06
Publication date: 2013-05-16
Also published as: JP2013102577A; CN103918159B; JP5887549B2; CN103918159A

Abstract

An energy management device includes: an evaluation unit for comparing a power consumption amount acquired by an acquisition unit, and a target value set by a setting unit; a storage unit for storing a plurality of control tables for stipulating the operation of an electric load; an input unit for inputting conditions for selecting a control table; and a selection unit for selecting a control table according to the conditions. The control tables are data tables in which a selection order has been assigned to the control contents. When the total power consumption amount exceeds the target value, the selection unit causes an indication unit to implement the control contents according to the selection order assigned thereto, until the total power consumption amount falls to or below the target value.

Description

Energy management equipment

The present invention relates to an energy management apparatus for managing the operation of a plurality of electric loads arranged in a facility space for the purpose of energy saving.

Recently, problems such as the reduction of carbon dioxide emissions and the limit of resources for power generation have emerged, and the demand for energy saving for consumers is increasing. For this reason, power-saving cooperation is required for users. However, facilities (stores, small and medium offices, restaurants, etc.) where energy management specialists are not stationed have only facility managers who do not have sufficient knowledge. It is difficult to make it.

Therefore, it is conceivable that the power consumption amount is not shown to the user numerically, but the power consumption reduction rate is shown to the user as a percentage, and the user only selects the reduction rate. For example, the reduction rate is shown in the form of 5% reduction or 10% reduction, and the user selects the reduction rate. By adopting this technology, it becomes possible for a user who does not have sufficient knowledge about energy management to perform energy management so as to intuitively achieve a necessary reduction rate.

However, in the facility space, many devices that adjust the environment of the facility space such as illuminance and temperature are used, and this type of device is closely related to comfort. That is, energy saving and comfort have a contradictory relationship. For example, if the lighting device during business hours is turned off in order to reduce power consumption (energy consumption) by 10%, the illuminance is insufficient and the comfort is impaired.

Therefore, it is required to reduce the power consumption within the allowable range of comfort. That is, regarding the power consumption, it is necessary to limit the operation of the electric load so that the comfort is not the maximum, but is within an allowable range. A technique for reducing the amount of power consumption by adjusting the operation of the electric load in this way has been conventionally proposed (see, for example, Japanese Patent Application Publication No. 2009-240054 (hereinafter referred to as “Document 1”)).

However, the technology described in Document 1 only limits the operation of the electrical load when the peak of power consumption is expected to exceed the set reference value, and realizes the reduction rate specified by the user I can't do it. Moreover, since this technique is intended to suppress the accumulated power amount for 30 minutes to be equal to or less than the contract power, there is no change in the method of controlling the electric load, and the above-described comfort is sufficiently taken into consideration. It can not be said.

On the other hand, in the facility space, the number of people in the space changes with time, and because the usage is often different for each place in the space, the comfort conditions change with time and place. Therefore, when practicing energy saving, it is desired to consider changes in comfort conditions.

An object of the present invention is to provide an energy management device that achieves both energy saving and comfort by controlling the operation of an electrical load in consideration of comfort according to time and place in a facility space. .

The energy management device of the present invention includes an acquisition unit (12), a setting unit (11), an evaluation unit (13), an instruction unit (14), a storage unit (15), an input unit (17), and a selection unit (16). Prepare. An acquisition part (12) is comprised so that the power consumption of the some electric load (20) each set to the some division in facility space may be acquired for every division. The setting unit (11) is configured to set a target value for the amount of power to be reduced in the facility space. The evaluation unit (13) is configured to compare the total power consumption acquired by the acquisition unit (12) with a target value set through the setting unit (11). The instructing unit (14) is configured to instruct the plurality of electric loads (20) to perform an operation for reducing power consumption in units of the section. The storage unit (15) stores a plurality of control tables for determining the operations of the plurality of electric loads (20) and a plurality of conditions respectively associated with the plurality of control tables. The input unit (17) is configured to input conditions for selecting a control table from the storage unit (15). The selection unit (16) is configured to select a control table associated with a condition input from the storage unit (15) to the input unit (17). Each of the plurality of control tables includes a plurality of control contents and a plurality of selection orders respectively assigned to the plurality of control contents. The plurality of control contents are classified by the instruction unit (14) for each section. Define the action to instruct the electrical load (20). When the total power consumption exceeds the target value in the comparison result of the evaluation unit (13), the selection unit (16) performs the control until the total power consumption becomes equal to or less than the target value. The control unit is configured to cause the instruction unit (14) to execute the control contents of the control table according to the selection order of the tables.

In one embodiment, the energy management device further includes a changing unit (18), and the operations of the plurality of electric loads (20) can be individually changed for each of the sections. The changing unit (18) is configured to change the selection order of the control contents in the control table to the lower side when the operation of the electric load (20) is changed.

According to the present invention, the operation of the electric load is controlled in consideration of comfort according to time and place in the facility space, and there is an advantage that it is possible to achieve both energy saving and comfort.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a block diagram which shows embodiment. It is operation | movement explanatory drawing same as the above. It is a figure which shows the operation example same as the above.

In the embodiment described below, a case where the amount of electric power consumed by an electric load is reduced in a facility space such as a supermarket that handles food will be described as an example. However, the facility space is not limited to food supermarkets, but is a convenience store, other commercial facilities such as department stores and store buildings, accommodation facilities such as hotels, medical facilities such as hospitals and nursing homes, office buildings, etc. Also good.

The energy management apparatus is used for the purpose of instructing the operation of the electric load so as to achieve the target value related to the reduction of power consumption set by the user. Therefore, as shown in FIG. 1, the energy management apparatus 10 includes a setting unit 11 for the user to set a target value of power consumption. For example, the energy management apparatus 10 has a variable target value, and the user sets the target value through the setting unit. In addition, the energy management apparatus 10 acquires the power consumption amounts of the plurality of electrical loads 20 via the plurality of measurement units 30 in order to monitor the amount of power actually used by the plurality of electrical loads 20. The acquisition part 12 comprised by is provided. The amount of power consumption acquired by the acquisition unit 12 is compared with a target value of power consumption in an evaluation unit 13 provided in the energy management apparatus 10, and an evaluation result of the evaluation unit 13 and a control table selected by a selection unit 16 described later. 151, the operation of the plurality of electric loads 20 is instructed from the instruction unit 14.

As described below, a plurality of electrical loads 20 are arranged in the facility space. For example, the facility space is divided into a plurality of sections, and the plurality of electric loads 20 are set (assigned) to the plurality of sections. For example, at least one type of electrical load 20 is assigned to each of the plurality of sections. For each place where the electric load 20 is disposed (a place where the environment is substantially the same), the same type of electrical equipment is controlled in a lump. That is, when a plurality of electric devices of the same type are arranged at the same place, these electric devices are collectively controlled so as to perform the same operation. In the following, a plurality of electric devices that are collectively controlled are handled as one section of the electric load 20. Usually, one section of the electric load 20 is connected on one branch line branched by a distribution board. Therefore, by measuring the power consumption for each branch line, the power consumption of the electric load 20 can be measured for each section. However, it is not essential that the electrical load 20 is connected to the branch line for each section, and a plurality of sections of the electrical load 20 may be connected to one branch line. The load 20 may be connected to a plurality of branch lines. The electric load of the present invention includes, for example, at least one electric device.

The instruction unit 14 instructs the operation of the electric load 20 in accordance with a control order (specifically described later) defined by the control table 151 set in the storage unit 15 provided in the energy management apparatus 10. The storage unit 15 stores a plurality of types of control tables 151, and selection conditions are associated with each control table 151. In addition, the energy management device 10 includes a selection unit 16 configured to match the condition given from the input unit 17 with the selection condition stored in the storage unit 15. When there is a selection condition that matches the condition given from the input unit 17, the selection unit 16 extracts the control table 151 associated with the selection condition from the storage unit 15. Details of the control table 151 will be described later.

By the way, the target value related to the reduction of power consumption can be expressed by the numerical value of the electric energy. However, when the electric energy is expressed by the actual numerical value, the user himself examines the numerical value of the past electric energy and determines the target value. Work to set up properly is necessary. Such an operation is time-consuming and is likely to increase the possibility of erroneous setting of the target value. That is, it is not easy for a general user who uses a facility space to set a target value using a numerical value of electric energy.

In recent years, percentages are used when public institutions indicate the target value for reducing carbon dioxide emissions and the target value for reducing the amount of power used, so if the target value can be set as a percentage, it will be useful for the user. Setting of the target value is facilitated, and the possibility of erroneous setting of the target value is reduced. However, since the acquisition unit 12 acquires the amount of electric power, in order to express the target value as a percentage, it is necessary to convert the percentage into the amount of electric power for comparison in the evaluation unit 13. In other words, a reference value of the electric energy with respect to the target value is necessary, and by multiplying the reference value by the target value, the electric energy as the target value is calculated and compared with the electric power consumption acquired by the acquisition unit 12. Is possible.

For the standard value of electric energy, a standard value corresponding to the scale of the facility space is used for simplicity. In other words, parameters that are easy to acquire, such as the sales floor area of the facility space or the number of electrical loads, can be used, and standard values prepared in advance can be applied to these parameters. It is. In addition, when it is possible to obtain the power consumption or the electricity charge for a certain past period (for example, one year), the reference value may be determined from such past results. These reference values are set by the installer at the time of installation of the energy management apparatus 10, so that the user can set the target values by percentage without being aware of the reference values.

The setting unit 11 has a configuration selected from a DIP switch, a digital thumbwheel switch, a numeric keypad, a touch panel, a memory switch that holds setting contents instructed from other devices, and the like. When the memory switch is used for the setting unit 11, an interface device (not shown) for connecting another device to the energy management device 10 is required. The interface device may have a well-known specification such as USB (Universal SerialusBus).

The electrical load 20 is connected to the energy management apparatus 10 via the controller 21, and the controller 21 controls the electrical load 20 according to the instruction when an instruction from the instruction unit 14 is given to the controller 21. For example, if the electrical load 20 is at least one lighting device capable of dimming, when the controller 21 receives a dimming instruction from the instruction unit 14, a signal for dimming to the corresponding electric load 20 (illuminating device). give. If the electric load 20 is an air conditioner, the controller 21 gives a signal for adjusting the temperature to the corresponding electric load 20 (air conditioner) upon receiving a temperature instruction from the instruction unit 14. In short, the controller 21 has a function of converting an instruction given as a message from the energy management apparatus 10 into a signal for determining the operation of the corresponding electric load 20. If the electric load 20 has a function of receiving a message from the energy management apparatus 10, the controller 21 can be omitted.

The evaluation unit 13 compares the total amount of power consumption acquired by the acquisition unit 12 with the target value (power amount obtained from the target value) set in the setting unit 11, and the total amount of power consumption exceeds the target value. If so, the selection unit 16 is notified. On the other hand, when the total amount of power consumption acquired by the acquisition unit 12 is less than or equal to the target value, in principle, notification to the selection unit 16 is not performed and the operation of the electric load 20 is maintained.

Here, it is conceivable that the acquisition unit 12 continuously acquires the total amount of power consumption (for example, every second), but the energy management device 10 does not need to follow minute fluctuations in the power consumption. . Therefore, the acquisition part 12 should just acquire power consumption intermittently for every predetermined time (it selects from 1 minute, 5 minutes, 30 minutes, 1 hour etc.). If the acquisition unit 12 acquires the power consumption every 5 minutes, the evaluation unit 13 also compares the total power consumption with the target value every 5 minutes.

However, whether or not the power consumption finally reaches the target value is determined based on a longer period (for example, one day, one week, one month, one year, etc.). For example, when determining whether or not the target value has been achieved in units of one day, the power consumption acquired by the acquisition unit 12 may be integrated over a period of one day, and the integrated result may be compared with a reference value.

By the way, in order to achieve the target value of the power consumption set by the user, the electrical load 20 to be controlled is selected from the plurality of electrical loads 20, and the power consumption is set for the selected electrical load 20. It is necessary to instruct an appropriate operation for reduction. In order to achieve the target value of power consumption, it is conceivable to reduce the power consumption of all the electrical loads 20 uniformly so as to match the target value. However, since the power consumption and the comfort are often in a contradictory relationship, if the power consumption is reduced uniformly, there is a high possibility that the comfort will be uniformly impaired. Therefore, if the facility space is a store, the comfort of the sales floor is uniformly impaired, resulting in the possibility of impairing the ability to attract customers.

For example, it is assumed that the facility space is a food supermarket, and the electric load 20 is a lighting device that adjusts the illuminance environment and an air conditioning device that adjusts the temperature environment. Under these conditions, when the illuminance of the sales floor is lower than usual during busy periods with many visitors, or when the sales floor temperature is higher than normal in the summer when the outside temperature is high, the customer comfort is impaired. However, when the number of visitors is low, it may be acceptable even if the illuminance of the sales floor is lower than normal, and because the amount of heat released from people is small, even if the temperature of the sales floor is higher than normal, it is acceptable. There is a possibility.

If the electrical load 20 is a lighting device at the sales floor, the night light should normally be turned on outside of business hours, and there is less possibility of dissatisfaction even if the illuminance is reduced compared to the busy time when it is busy. Conceivable.

Also, since employees in the facility space can be considered to have a wider tolerance for comfort than customers, the illuminance and temperature at the place where only employees work can be different from the illuminance and temperature at the sales floor. .

As can be understood from the above-described example, in the facility space, power consumption is reduced depending on conditions such as the type of the electric load 20, the place where the electric load 20 is used, the time zone in which the electric load 20 is used, and the external environment. Because of the different operation. Therefore, if attention is paid to the fact that there are a large number of electrical loads 20 according to the place and purpose in the facility space, it is considered that the decrease in comfort associated with the reduction in power consumption can be suppressed. In order to realize this idea, the energy management apparatus 10 of this embodiment includes a control table 151 for selecting the type and operation of the electric load 20.

A plurality of control tables 151 are registered in the storage unit 15, and conditions are associated with each control table 151. In the present embodiment, the conditions associated with the control table 151 are defined by four types of parameters: the location where the electric load 20 is used, the time zone, the outdoor environment, and the control performance. However, the parameters that define the conditions are appropriately determined according to the use and specifications of the facility space. The energy management apparatus 10 includes an input unit 17 in order to select a control table 151 that meets a condition from a plurality of control tables 151 stored in the storage unit 15. The input unit 17 is provided to give a condition to the selection unit 16. The conditions set in the input unit 17 may be registered by the user or the installer of the energy management apparatus 10. For the time zone and outdoor environment, if you set the date and time corresponding to busy, quiet, off-business hours, summer, winter, daytime, midnight, etc., the conditions will be judged using the date and time measured by the built-in clock Is done. When an appropriate sensor can be connected, it is possible to determine the condition using the output of the sensor.

In the following, in order to explain with an example, two types of lighting equipment and air-conditioning equipment are assumed as the electrical load 20, and two places, a sales floor and a work place, are assumed as places. In addition, the time zone is roughly divided into two categories, that is, business and non-business, and further, during business, it is classified into two categories: busy times when the number of customers is relatively large and quiet times when the number of customers is relatively small. The outdoor environment is classified into two categories, summer and winter, for air conditioners, and two categories, daytime and night, for lighting devices. Further, the control performance is an item related to the control content according to the specification of the electric load 20. For example, the control performance of the lighting device has the possibility of dimming. When dimming the lighting device, if the lighting device is dimmable, a dimming signal is given to the lighting device, and the lighting device is adjusted. If it is impossible to light, some lighting devices are turned off.

Tables 1 to 4 show examples of the control table 151. The control table 151 is a data table in which the control content in which the electric load 20 that is a control target when reducing the power consumption is associated with the operation of the electric load 20 is registered. A plurality of control tables 151 are included in one control table 151. The contents of control are included. In addition, a selection order (corresponding to the control order described above) is set in the control contents included in the control table 151, and the selection unit 16 performs control when the target value is not achieved in the evaluation result of the evaluation unit 13. The contents are selected in order according to the selection order, and the instruction unit 14 is caused to execute the control contents.

Tables 1 and 3 are control tables 151 when the selection order is determined only by the comfort level. Tables 2 and 4 are control tables 151 when the selection order is determined based on both the comfort level and the energy saving effect. In Tables 1 to 4, two types of electric loads 20 (that is, air conditioning loads and lighting loads) are assigned to the target sections of the control table 151. The air conditioning load may be at least one air conditioner dedicated to the target section, or may be a central air conditioning system capable of controlling the air conditioning of the facility space for each section.

In selection order 1 in Table 1, the set temperature of the air conditioning load is the first temperature, and the light output of the lighting load is, for example, the rated output (100%). The first temperature is, for example, 26 ° C. as a comfortable temperature. In selection order 2, the set temperature of the air conditioning load is a second temperature for operating the air conditioning load with power consumption lower than the power consumption of selection order 1, and the light output of the illumination load is, for example, a rated output. In the example of Table 1, the second temperature is 28 ° C. In selection order 3, the set temperature of the air conditioning load is the second temperature, and the light output of the illumination load is the first dimming output lower than the power consumption of

selection orders

1 and 2. In the example of Table 1, the first dimming output is 75%. In selection order 4, the set temperature of the air conditioning load is the second temperature, and the light output of the illumination load is the second dimming output lower than the first dimming output. In the example of Table 1, the second dimming output is 50%.

In selection order 1 in Table 3, the set temperature of the air conditioning load is the first temperature, and the light output of the lighting load is, for example, a rated output. In selection order 2, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the first dimming output. In selection order 3, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the second dimming output. In selection order 4, the set temperature of the air conditioning load is the second temperature, and the light output of the illumination load is the second dimming output.

In selection order 1 in Table 2, the set temperature of the air conditioning load is the second temperature, and the light output of the lighting load is, for example, a rated output. In selection order 2, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the rated output. In selection order 3, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the first dimming output. In selection order 4, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the second dimming output.

In selection order 1 in Table 4, the air conditioning load is, for example, off, and the light output of the illumination load is the second dimming output. In selection order 2, the set temperature of the air conditioning load is the second temperature, and the light output of the illumination load is the second dimming output. In selection order 3, the set temperature of the air conditioning load is the second temperature, and the light output of the illumination load is the first dimming output. In selection order 4, the set temperature of the air conditioning load is the first temperature, and the light output of the illumination load is the first dimming output.

When adopting the control table 151 shown in Table 1 to Table 4, any one of the control table 151 shown in Table 1 and Table 3 or the control table 151 shown in Table 2 and Table 4 is registered in the storage unit 15. Here, the comfort level and the effect are values that are appropriately set in advance for a combination of conditions (location, time zone, outdoor environment, control performance) for using the electric load 20 and control contents (electric load, operation). It is. By setting the comfort level and the effect in advance, it is possible to automatically determine the selection order in the control table 151 if it is determined whether to consider only the comfort level or to combine the comfort level and the energy saving effect. It becomes possible to do.

For example, when the control table 151 shown in Tables 1 to 4 is created, if the control content, comfort level, and effect are associated with each other as shown in Tables 5 and 6, the control table is used using Tables 5 and 6. 151 can be automatically generated.

In generating Tables 2 and 4, the selection order considering both the comfort level and the effect is determined by using a value obtained by adding the comfort level and the effect. As shown in Tables 5 and 6, data in which the comfort level and the effect are scored are created in advance and registered in the storage unit 15. If such data is set in the storage unit 15, the user simply selects whether to consider only the comfort level or both the comfort level and the effect, as shown in Tables 1 to 4. The control table 151 can be automatically generated.

As a hardware element for realizing the energy management apparatus 10, a microcomputer is mainly used. In addition, a program for operating the microcomputer as the energy management apparatus 10 having the above-described functions is executed. The operation procedure of this program is summarized in FIG. The above-described operation is an operation of a main part of the present embodiment, and FIG. 2 includes operations other than the main part.

That is, when the energy management apparatus 10 operates, the acquisition unit 12 intermittently acquires the power consumption for each section of the electrical load 20 every predetermined time (S1), and the total power consumption acquired by the acquisition unit 12 is obtained. Obtain (S2). Furthermore, the acquisition unit 12 integrates the total amount of power consumption (S3), and predicts the integrated power amount after a predetermined time from the integrated value of power consumption (S4). The prediction in step S4 may be linear prediction as in the demand control. For example, the accumulated power amount after a predetermined time (for example, 5 minutes) is predicted by extending the slope of the power consumption amount within the past predetermined time (for example, 30 minutes).

Next, the evaluation unit 13 compares the target value set by the setting unit 11 with the integrated power amount predicted by the acquisition unit 12 (S5). Here, the evaluation unit 13 not only compares whether or not the target value is achieved, but also evaluates the degree of achievement when the target value is achieved. That is, when the target value is achieved, a difference between the target value and the integrated power amount is obtained, and if the difference is equal to or greater than a specified threshold value, it is determined that the target value is easily achieved.

When it is determined in step S5 that the target value is not achieved (S5: NG), the selection unit 16 selects the control table 151 for promoting energy saving (S6) as in the above-described operation, and the instruction unit 14 Instructs the operation of the electrical load 20 in accordance with the selected control table 151 (S7). On the other hand, if it is determined in step S5 that it is easy to achieve the target value (S5: OK2), it is considered that the comfort may be improved, and therefore the control table 151 selected by the selection unit 16 is stored. Use (S8) and instruct the operation of the electrical load 20 with the selection order as the reverse order (S9). If it is determined in step S5 that the target value is achieved but there is no room (S5: OK1), the operation of the electric load 20 is not changed and the process proceeds to the subsequent processing.

Thereafter, when the time for which the accumulated power amount is predicted has elapsed (S10: Yes), the acquisition unit 12 resets the accumulated power amount to 0 (S11). In addition, the process waits until it is time for the acquisition unit 12 to acquire the power consumption (S12).

As described above, by repeating the operation shown in FIG. 2, the operation of the electrical load 20 is controlled so that the target value set by the user is achieved. FIG. 3 shows the transition of the integrated power amount when such control is performed.

FIG. 3 shows the transition of the integrated power amount per day, (1) is the actual measurement value measured by the measuring unit 30, and (2) is the integrated power value set as the target value. In the example described above, the operation divided into busy time, quiet time, and non-business is shown, but in the example shown in FIG. 3, the control table 151 used every 6 hours is selected. In the illustrated example, the actual measurement value exceeds the target value at the control start time (12:00 on that day), but the target value is achieved at 12:00 on the next day. In this way, the target value can be achieved by selecting the control table 151 according to the above-described conditions such as the place and time zone, and controlling the operation of each electric load 20 according to the selection order.

In the above operation example, the lighting device and the air conditioner are shown as the electric load 20, but in a supermarket that handles food, a refrigeration device (including a refrigeration device) is often used as the electric load 20. Therefore, power consumption by the refrigeration equipment is also taken into consideration as necessary. Refrigeration equipment maintains a constant evaporation temperature during business hours, regardless of whether it is quiet or busy, and the temperature changes less during the business hours during the business hours. It is possible to set the evaporation temperature higher (for example, higher by 1 to 2 ° C.).

Incidentally, since the energy management device 10 automatically determines the operation of the electric load 20 according to the selected control table 151, the user may not be allowed to operate the electric load 20. In preparation for such a case, the user is allowed to individually control the electric load 20 for each section. That is, even when the operation of the electric load 20 is instructed by the energy management device 10, the operation of the electric load 20 can be individually changed for each category.

When the operation of the electric load 20 is changed, the energy management apparatus 10 determines that the user does not allow the current operation, and sets the selection order of the control content of the electric load 20 in the control table 151 to the lower side. You may provide the change part 18 to change. When the operation of the electrical load 20 is changed, the changing unit 18 changes the selection order in the control table 151 to the lower side. With this function, when the same control table 151 is next selected, the probability of the same control content being reduced is reduced, and as a result, the user's comfort is improved. That is, by making the selection order of the control table 151 dynamically changeable, the control table 151 according to the user's preference and the site environment can be obtained.

While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims

An acquisition unit configured to acquire, for each category, power consumption amounts of a plurality of electric loads respectively set in the plurality of categories in the facility space;
A setting unit for setting a target value of the amount of power to be reduced in the facility space;
An evaluation unit configured to compare the total amount of power consumption acquired by the acquisition unit with a target value set through the setting unit;
An instruction unit configured to instruct an operation for reducing power consumption to the plurality of electric loads in units of the section;
A storage unit for storing a plurality of control tables for determining the operation of the plurality of electrical loads, and a plurality of conditions respectively associated with the plurality of control tables;
An input unit configured to input a condition for selecting a control table from the storage unit;
A selection unit configured to select a control table associated with a condition input from the storage unit at the input unit;
Each of the plurality of control tables includes a plurality of control contents and a plurality of selection orders respectively assigned to the plurality of control contents. Specify the action to be directed,
When the total power consumption exceeds the target value in the comparison result of the evaluation unit, the selection unit is configured according to the selection order of the control table until the total power consumption is equal to or less than the target value. An energy management device configured to cause the instruction unit to execute control contents of a control table.
The operations of the plurality of electrical loads can be individually changed for each of the sections,
The energy management apparatus according to claim 1, further comprising: a changing unit configured to change a selection order of control contents in the control table to a lower side when an operation of the electric load is changed.