JP5972073B2 - Power management equipment - Google Patents

Description

  The present invention relates to a power management apparatus that manages the power of individual air conditioners in an air conditioning management system including a plurality of air conditioners.

  When temporary power consumption of an air conditioner suddenly increases due to intense heat such as summer, a power supplier such as a power company may fall short of power supply. In this case, the power supply source may request / request the power consumer to suppress power consumption called demand response. (For example, refer nonpatent literature 1).

  As conventional demand control, there has been an air conditioning management system capable of monitoring an index corresponding to the power consumption of a facility and performing energy-saving control of the air conditioning equipment in accordance with the power consumption of the facility (see, for example, Patent Document 1). .

Japanese Patent Laying-Open No. 2004-324985 (FIG. 1)

Norio Murakami and Edward Murai "Smart Japan" Declaration, ASCII Media Works, Inc., August 10, 2011

  The conventional demand control described in Patent Document 1 performs control so as not to exceed the contracted power amount, and cannot cope with a case where the supply amount decreases in a limited time range. was there. Therefore, the system administrator needs to manually change the setting of the air conditioner, and it is unclear how effective that setting is for reducing power consumption.

  In addition, when the supply amount decreases in a limited time range, there is a problem that the user cannot know the scheduled execution time and contents of the demand.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a power management apparatus capable of automatically performing demand control in response to a demand request from a supply source. .

In order to solve the above conventional problems, a power management apparatus according to the present invention is a power management apparatus that controls a plurality of air conditioners connected to an internal network,
A power consumption reduction request receiving unit for acquiring data of power consumption reduction amount for each time zone from a terminal connected to an external network;
An operation state monitoring unit for monitoring operation states of the plurality of air conditioners connected to the internal network;
A power consumption monitoring unit that acquires data of the power consumption of the corresponding air conditioner from a plurality of power meters connected to the internal network;
A power consumption estimation unit that estimates power consumption for each predetermined time zone based on data of power consumption of each air conditioner acquired through the power consumption monitoring unit;
Based on the data on the operating condition of the air conditioner acquired through the operating condition monitoring unit and the data on the power consumption of the air conditioner acquired through the power consumption monitoring unit, the operating condition and power An operation state-power relationship calculating unit for calculating the relationship between
A setting input unit for setting operating conditions of the air conditioner;
Data of power consumption reduction amount for each time period received by the power consumption reduction request receiving unit , data of power consumption for each predetermined time period estimated by the power consumption estimation unit, calculated by the operating state-power relationship calculation unit Demand control calculation for calculating the content of demand control for reducing the power consumption of the air conditioner based on the data indicating the relationship between the operation state and the power and the data of the operating condition set by the setting input unit And
Based on demand control data calculated by the demand control calculation unit, a control command transmission unit that transmits a demand control command signal for each time zone to each of the air conditioners;
The data on the operating state of the air conditioner acquired through the operating state monitoring unit, the data on the power consumption of the air conditioner acquired through the power consumption monitoring unit, and the setting input unit A storage device that accumulates the acquired data of operating conditions of the air conditioner and the data of demand control calculated by the demand control calculation unit in association with time,
And a display unit for displaying demand control data stored in the storage device.

  The power management apparatus according to the present invention can automatically change the setting to suppress the power consumption of the air conditioner without impairing convenience in response to a demand request from a power supply source.

It is a figure which shows an example of a structure of the air-conditioning management system which employ | adopted the power management apparatus in Embodiment 1 of this invention. 3 is a functional block diagram showing a specific configuration of the power management apparatus in Embodiment 1. FIG. 4 is a flowchart showing each process of power consumption estimation and operation state-power relationship calculation of the power management apparatus in the first embodiment. 4 is a flowchart showing a flow of demand control of the power management apparatus in the first embodiment. It is a figure which shows arrangement | positioning of each area of the air-conditioning management system which performs demand control with an electric power management apparatus. It is a figure which shows the schedule after receiving a demand request from a power supply source until a power management apparatus implements demand control. It is a flowchart which shows the flow at the time of creating the schedule of demand control of an electric power management apparatus. It is a flowchart which shows the flow of a process in the change of temperature setting (step S24) of FIG. It is a flowchart which shows the flow of a process in change (step S26) of the ventilation mode of FIG. It is a flowchart which shows the flow of a process in the change (step S28) of stop control of FIG. It is a figure which shows an example of a structure of the air-conditioning management system which employ | adopted the power management apparatus in Embodiment 2 of this invention. 6 is a functional block diagram illustrating a specific configuration of a power management apparatus according to Embodiment 2. FIG. 10 is a flowchart showing a flow of demand control of the power management apparatus in the second embodiment.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an example of the configuration of an air conditioning management system that employs a power management apparatus according to Embodiment 1 of the present invention. The air-conditioning management system 7 installed in a building or business office consumes the power management device 1, the air conditioners 2A to 2F, the remote controls 3A to 3F associated with the air conditioners 2A to 2F, and the air conditioners 2A to 2F. It is comprised of electric energy measuring devices 4A to 4F that measure electric power, and the air conditioners 2A to 2F, the remote controllers 3A to 3F, and the electric energy measuring devices 4A to 4F and the power management device 1 are communication lines that constitute an internal network. 5 is connected.

  The air conditioners 2A to 2F are divided into areas (6A, 6B) having close physical relationships such as the same floor and the same living room, and the air conditioners 2A and 2B are installed in the area 6A. Harmonic machines 2C to 2F are installed.

  The power management apparatus 1 is connected to a power consumption reduction request terminal 10 installed in a power supply source 9 via an external network 8 such as the Internet.

FIG. 2 is a functional block diagram showing a specific configuration of the power management apparatus 1. As shown in FIG. 2, the power management apparatus 1 includes a power consumption reduction request receiving unit 101 , an operation state monitoring unit 102, a power consumption monitoring unit 103, a power consumption estimation unit 104, an operation state / power relationship calculation unit 105, and a setting input. Unit 106, demand control calculation unit 107, control command transmission unit 108, demand schedule notification unit 109, storage device 110, and display unit 111.

  Next, the operation of the power management apparatus 1 in the present embodiment will be described with reference to the flowcharts of FIGS. First, based on FIG. 3, each process of the estimation of the power consumption of the power management apparatus 1 and the calculation of the operation state-power relationship will be described.

  The operation state monitoring unit 102 acquires operation state information such as a start / stop state, a control state, an indoor set temperature, an indoor measurement temperature, and an outside air temperature from the air conditioners 2A to 2F every predetermined time (step S1). When the operation state monitoring unit 102 acquires operation state information from the air conditioners 2A to 2F (Yes in step S1), the operation state information history is stored in the storage device 110 in time series for each of the air conditioners 2A to 2F. Are stored (step S2).

  Next, the power consumption monitoring unit 103 acquires power consumption information from the power amount measuring devices 4A to 4F every predetermined time (step S3). When the power consumption monitoring unit 103 acquires the power consumption information from the power amount measuring devices 4A to 4F (Yes in step S3), the power consumption monitoring unit 103 stores the power consumption along the time series for each of the power amount measuring devices 4A to 4F in the storage device 110. An information history is accumulated (step S4).

  Subsequently, the power consumption estimation unit 104 calculates an estimated value of power consumption for each time zone of each of the air conditioners 2A to 2F from the history information accumulated in the storage device 110 (step S5). Further, the operation state-power relationship calculation unit 105 calculates the relationship between the operation state and power for each air conditioner from the history information accumulated in the storage device 110 (step S6).

Next, the flow of demand control of the power management apparatus 1 will be described based on FIG. The power consumption reduction request receiving unit 101 receives a demand request amount requested when a reduction in power consumption is necessary from the power consumption reduction request terminal 10 based on a supply and demand balance at the power supply source 9, that is, for each time period. A power consumption reduction amount is acquired (step S11).

  The demand control calculation unit 107 calculates the amount of power that can be used in each time zone from the acquired demand amount and the estimated power consumption value read from the storage device 110 (step S12). Moreover, the demand control calculating part 107 apportions the electric energy which can be used in each time slot | zone according to the number of air conditioners 2A-2F in each area 6A, 6B (step S13).

  Subsequently, the demand control calculation unit 107 calculates the power consumption calculated from the relationship between the operation state and the power for each of the air conditioners 2A to 2F for each of the areas 6A and 6B in accordance with the operation condition set by the setting input unit 106. However, the air conditioner to be controlled and the control content for each time zone are determined so as not to exceed the usable power amount in each time zone (step S14).

  Further, the demand control calculation unit 107 notifies the remote control units 3A to 3F of the control content for each determined time zone via the demand schedule notification unit 109, and the remote control units 3A to 3F control the control content (schedule for each time zone). ) Is displayed (step S15).

When the demand control time comes, the demand control calculation unit 107 transmits a demand control command signal to the corresponding air conditioners 2A to 2F via the control command transmission unit 108 to perform demand control (step S16). After transmitting the demand control command signal to the corresponding air conditioners 2A to 2F, the history information of the execution record is accumulated in the storage device 110 (step S17). The history information stored in the storage device 110 can be displayed on the display unit 111 and confirmed at any time.

  Next, referring to FIG. 5 to FIG. 10, “determining the control content for each time zone of the air conditioner to be controlled in the area from the relationship between the operating state and the power” shown in step S14 of the flowchart of FIG. That is, the process for calculating the content of demand control for each area and each time zone will be described more specifically.

  In FIG. 5, arrangement | positioning of each area 6C-6F of the air-conditioning management system 7a in the building 11 which performs demand control by the power management apparatus 1 of this Embodiment is shown. The air-conditioning management system 7a includes a conference room area 6C in which two air conditioners are installed, an office area 6D in which eight air conditioners are installed, an office area 6E in which four are installed, a dining area 6F in which three are installed, and air conditioning It is divided into guest room area 6G where two machines are installed.

  Table 1 below shows conditions for performing demand control in each area shown in FIG. Table 2 shows the definition of each item listed in the setting conditions of Table 1.

  In Table 1, demand control is prohibited for the guest room area 6G because of its character, and power consumption is not reduced. A temperature range that can be changed is defined for the other areas 6C to 6F. Moreover, about the conference room area 6C, change of a ventilation mode is impossible, and the stop of an air conditioner is impossible about the conference room area 6C and the office area 6D. Furthermore, the dining area 6F is not subject to demand control during lunch time (12:00 to 13:00).

  FIG. 6 shows a schedule from when a demand request is received from the power supply source 9 until the power management apparatus 1 executes demand control in the air conditioning management system 7a. In the example of FIG. 6, after a demand request is received from the power supply source 9 on July 24, “Please delete it to 85% of normal power from 11:00 to 14:00 on July 25.” The schedule for completing the control is shown.

  With reference to the flowcharts of FIGS. 7 to 10, a procedure for creating a schedule for demand control performed by the demand control calculation unit 107 of the power management apparatus 1 will be described. The demand control schedule is created for each area and each time zone. For example, it is created in units of one hour for each area, such as 11:00 to 12:00 in the office area 6D and 13:00 to 14:00 in the dining area 6F. However, no schedule is created in areas and time zones where demand control is prohibited, such as the guest room area 6G and the dining room area 6F, such as from 12:00 to 13:00.

  FIG. 7 shows a flow when creating a schedule. The amount of power that can be used in each of the areas 6D to 6G is obtained by dividing the amount of power that can be used in the air conditioning management system 7a by the number of air conditioners 2 in each of the areas 6C to 6G.

  First, the demand control calculation unit 107 reads the setting conditions in the target area from the storage device 110, and determines whether demand control is prohibited (step S21). When demand control is prohibited in the target area (Yes), the calculation of the schedule is terminated, and when it is not prohibited (No), it is next determined whether or not the corresponding time zone is a demand control prohibited time. (Step S22).

  The demand control calculation unit 107 ends the calculation of the schedule when the corresponding time zone is the demand control prohibited time (Yes), and starts the calculation of the schedule when it is not the control prohibited time (No).

  In the calculation of the schedule, the temperature setting is changed (step S24), the air blowing mode is changed (step S26), and the stop control is changed (step S28). When these three processes are completed, the schedule is calculated. The process ends (step S30). FIG. 8 shows a specific processing flow for changing the temperature setting, FIG. 9 shows a processing flow for changing the air blowing mode, and FIG. 10 shows a processing flow for changing the stop control.

  Based on FIG. 8, the flow of processing in changing the temperature setting (step S24) will be described. The demand control calculation unit 107 determines whether or not the temperature of the target area can be changed based on the setting conditions (step S241). If the change of the temperature is prohibited in the target area (Yes), the air flow mode is set. When the process proceeds to the change (step S26) and the change of temperature is not prohibited (No), the total amount of electric power of the air conditioner 2 in the area is changed while changing the set temperature of the air conditioner 2. Look for conditions that are less than the available power.

  Specifically, the temperature of the air conditioner 2 in the area is raised by 1 ° C. for cooling, and lowered by 1 ° C. for heating, and the total amount of electric energy of each air conditioner 2 can be used while increasing the number. Searching for a state where the amount of electric power is less than or equal to the electric energy, if the state cannot be realized by increasing or decreasing 1 ° C., the same processing is repeated while further increasing or decreasing the set temperature by 1 ° C. (steps S242 to S252). Finally, the temperature of each air conditioner when the power amount of all the air conditioners 2 becomes equal to or less than the usable power amount is determined, and the value is stored in the storage device 110 (in step S244 or S249). Yes).

  On the other hand, even if the temperature of all the air conditioners is set to the maximum changeable temperature, if the sum of the power amounts of the individual air conditioners 2 does not become less than the usable power amount (Yes in step S247), The ventilation mode is changed (step S26). Based on FIG. 9, the process of air blowing mode change is demonstrated.

  The demand control calculation unit 107 determines whether or not the air blowing mode can be changed in the target area based on the setting conditions (step S261), and stops changing the air blowing mode in the target area (Yes). When the process proceeds to control change (step S28) and change of the air blowing mode is not prohibited (No), it is next determined whether or not the operation mode is cooling (step S262). Since the change of the air blowing mode does not make sense during heating, when the operation mode is not cooling (No in step S262), the process proceeds to the change of stop control (step S28).

  In the process of changing the air blowing mode (step S26), the demand control calculation unit 107 can use the sum of the electric energy of each air conditioner 2 while increasing the number of air conditioners 2 to be changed from the cooling to the air blowing mode. A condition that is less than or equal to the amount of electric power is searched, and when that condition is met, the condition is stored in the storage device 110 (steps S263 to S266).

  On the other hand, even if all the air conditioners 2 are set to the blow mode, if the sum of the power amounts of the individual air conditioners 2 is not less than the usable power amount (No in step S266), the stop control is changed (step S28). Perform the process. The stop control change process will be described with reference to FIG.

  The demand control calculation unit 107 determines whether or not the stop control can be changed in the target area based on the setting condition (step S281). If the change of the stop control is prohibited in the target area (Yes), the schedule is calculated. Finish creating. When the change of the stop control is not prohibited (No), the condition that the sum of the power amounts of the individual air conditioners 2 is less than the usable power amount while increasing the number of air conditioners 2 whose operation is stopped is set. If the conditions are found and the conditions are met, the creation of the schedule is terminated, and the conditions are stored in the storage device 110 (steps S282 to S285). The schedule calculation ends when the above-described steps S24 to S28 are completed (step S30).

  As described above, according to the power management apparatus 1 of the present embodiment, the setting is changed to automatically suppress the power consumption of the air conditioner 2 without losing convenience for the demand request of the supplier. can do. In addition, it is possible to notify the user of the demand control execution schedule via the remote controller 3, and further, it is possible to reduce the uneven temperature change for each area due to the demand control.

Embodiment 2. FIG.
In addition to the configuration of the power management apparatus 1 of the first embodiment, the power management apparatus 1b according to the second embodiment of the present invention demands a user from a mobile terminal or a remote monitoring terminal connected to the external network 8. The control schedule is notified.

  In FIG. 11, an example of a structure of the air-conditioning management system 7b in Embodiment 2 is shown. In the figure, the same components as in FIG. The same applies to the following.

  As shown in FIG. 11, the power management apparatus 1 b in the present embodiment is connected to a mobile terminal 201 and a remote monitoring terminal 202 via a network 8. The mobile terminal 201 is an example of a wireless communication device that can be easily carried by a user, and is connected to the external network 8. The remote monitoring terminal 202 is an example of a wired communication device installed in a building or business office, and is connected to the external network 8.

  FIG. 12 shows the configuration of the power management apparatus 1b in the present embodiment. As shown in the figure, the power management device 1b of the present embodiment is different from the power management device 1 of the first embodiment in that a demand schedule notification unit 203 is provided instead of the demand schedule notification unit 109. .

  With reference to the flowchart of FIG. 13, the operation of the power management apparatus 1b in the present embodiment will be described. In the figure, the same steps as those in FIG.

  In addition to the operation of the demand schedule notification unit 109, the demand schedule notification unit 203 further sets the content and time zone of demand control for each of the air conditioners 2 </ b> A to 2 </ b> F determined by the demand control calculation unit 107. To the previously registered mobile terminal 201 and remote monitoring terminal 202 (step S31).

  Therefore, according to the power management apparatus 1b in the present embodiment, in addition to the effects of the power management apparatus 1, each air conditioner 2 is connected via the mobile terminal 201 and the remote monitoring terminal 202 connected to the external network 8. Since the contents of demand control are notified to the user, the execution schedule of demand control for each air conditioner 2 can be centrally managed.

  In each of the above-described embodiments, the control processing of the air conditioner is realized by an independent device called a power management device, but it goes without saying that these functions can also be realized as a program for causing a computer to execute these functions. .

DESCRIPTION OF SYMBOLS 1, 1b Power management apparatus 2, 2A-2F Air conditioner 3A-3F Remote control 4A-4F Electric energy meter 5 Internal communication line 6A-6G Area 7, 7b, 7c Air-conditioning management system 8 External network 9 Power supply source 10 Consumption Power reduction request terminal 11 Building 101 Power consumption reduction request reception unit 102 Operation state monitoring unit 103 Power consumption monitoring unit 104 Power consumption estimation unit 105 Operation state-power relation calculation unit 106 Setting input unit 107 Demand control calculation unit 108 Control command transmission unit 109, 203 Demand schedule notification unit 110 Storage device 111 Display unit 201 Mobile terminal 202 Remote monitoring terminal

Claims (7)

A power management device for controlling a plurality of air conditioners connected to an internal network,
A power consumption reduction request receiving unit for acquiring data of power consumption reduction amount for each time zone from a terminal connected to an external network;
An operation state monitoring unit for monitoring operation states of the plurality of air conditioners connected to the internal network;
A power consumption monitoring unit that acquires data of the power consumption of the corresponding air conditioner from a plurality of power meters connected to the internal network;
A power consumption estimation unit that estimates power consumption for each predetermined time zone based on data of power consumption of each air conditioner acquired through the power consumption monitoring unit;
Based on the data on the operating condition of the air conditioner acquired through the operating condition monitoring unit and the data on the power consumption of the air conditioner acquired through the power consumption monitoring unit, the operating condition and power An operation state-power relationship calculating unit for calculating the relationship between
A setting input unit for setting operating conditions of the air conditioner;
Data of power consumption reduction amount for each time period received by the power consumption reduction request receiving unit , data of power consumption for each predetermined time period estimated by the power consumption estimation unit, calculated by the operating state-power relationship calculation unit Demand control calculation for calculating the content of demand control for reducing the power consumption of the air conditioner based on the data indicating the relationship between the operation state and the power and the data of the operating condition set by the setting input unit And
Based on demand control data calculated by the demand control calculation unit, a control command transmission unit that transmits a demand control command signal for each time zone to each of the air conditioners;
The data on the operating state of the air conditioner acquired through the operating state monitoring unit, the data on the power consumption of the air conditioner acquired through the power consumption monitoring unit, and the setting input unit A storage device that accumulates the acquired data of operating conditions of the air conditioner and the data of demand control calculated by the demand control calculation unit in association with time,
Characterized by comprising a display unit for displaying data has been demand control stored in the storage device, the power management device. 2. The power management according to claim 1, further comprising a demand schedule notification unit configured to notify a content of demand control calculated by the demand control calculation unit to a remote controller associated with each of the air conditioners. apparatus. The power management apparatus according to claim 2, wherein the demand schedule notification unit further notifies the mobile terminal or the remote monitoring terminal of the content of the demand control calculated by the demand control calculation unit. The demand control arithmetic unit further on the basis of the data relating to the physical positional relationship of the input air conditioner from the setting input unit, characterized by taking into account the deviation of the temperature change in the operation of the demand control, claim 1 The power management apparatus according to any one of? The physical positional relationship indicates that the plurality of air conditioners are divided and installed in a plurality of areas, and the demand control calculation unit calculates the demand control conditions for each area and each time zone The power management apparatus according to claim 4, wherein: The power management apparatus according to claim 5, wherein the demand control calculation unit performs the calculation of the demand control in the order of temperature setting change, air blowing mode change, and stop control change for each area. The demand control calculation unit determines the operating conditions when the sum of the electric energy of the air conditioners arranged in each area is equal to or less than the usable electric energy in the area, and the content of demand control in that time zone. The power management apparatus according to claim 6, wherein:

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