JP5766560B2 - Power consumption reduction support system, power consumption reduction support device, power consumption reduction support method, and program - Google Patents

Description

  Embodiments described herein relate generally to a power consumption reduction support system, a power consumption reduction support device, a power consumption reduction support method, and a program that support energy saving in buildings such as buildings and factories.

To reduce greenhouse gas emissions, there is a need to reduce power consumption (energy saving) on the demand side of buildings and homes. In recent years, laws and regulations have been strengthened, such as the revision of the Energy Conservation Law, and the importance of efforts for energy conservation is becoming increasingly important.
In the next generation power system, it is assumed that the power consumption on the power demand side is intelligently controlled in order to operate the power system stably. In other words, an unprecedented power supply network is being formed that enables a communication environment to be established between the power supply side and the demand side, and the power consumption on the demand side can be monitored on the supply side. .

  In such an environment where next-generation power infrastructure is established, there is a need for a technology that can control power consumption on the demand side in a timely and appropriate amount. This kind of technology can contribute to the stabilization of the power system in addition to the energy saving effect that is a merit on the demand side. As a power control method on the demand side, for example, demand control is known in which the amount of power received for 30 minutes in a building is monitored to reduce power.

Japanese Patent No. 3315741 JP 2010-2222885 A Japanese Patent No. 3302800

  Conventional demand control is to reduce power consumption such as air conditioning according to a preset sequence, and generally suppresses power consumption on the demand side so as not to exceed contract power. In the next-generation distribution network, this can be promoted, and even when the demand side is unlikely to exceed the contracted power, the supply side can request a reduction in power consumption to further stabilize the power system. It is assumed that

In the conventional demand control, the power load is mechanically or blindly suppressed / cut off, so that there are cases where the comfort and convenience in the demand-side building room are impaired and there is a problem in power reduction. Therefore, it is required to be able to estimate in advance the amount of power that can be reduced in consideration of comfort and convenience.
An object of the present invention is to provide a power consumption reduction support system, a power consumption reduction support device, a power consumption reduction support method, and a program capable of suppressing power consumption.

  According to the embodiment, a power consumption reduction support system that supports power consumption reduction in a building includes a measurement unit, an indoor illuminance calculation unit, and a power reduction possible amount calculation unit. A measurement part measures the external light illumination intensity which is the illumination intensity of the light irradiated to the room | chamber interior of a building. The room illuminance calculation unit calculates the room illuminance due to light based on the measured outside light illuminance. The power reducible amount calculation unit calculates a reducible amount of power consumed by the indoor lighting device based on the calculated indoor illuminance.

The figure which shows an example of the system concerning embodiment. The functional block diagram which shows an example of the power consumption reduction assistance system concerning 1st Embodiment. The flowchart which shows the process sequence in the system shown by FIG. The figure which shows an example of the screen display content in the user terminal. The figure which shows the state which looked at the blind from the side. The figure which shows the state which looked down at the blind slat surface 401 from the top. The figure which shows the graph showing the relationship between the optimal slat angle (theta) B and the solar altitude h on 1st conditions. The figure which shows the graph showing the relationship between the optimal slat angle (theta) B and the solar altitude h on 2nd conditions. The figure which shows the graph showing an example of a blind characteristic. The figure for demonstrating the coordinate of the room arbitrary points at the time of fixing a reference coordinate system to a blind. The figure which shows the relationship between the illumination intensity for every different dimming pattern, and power consumption. The figure which shows an example of a dimming pattern. The functional block diagram which shows an example of the power consumption reduction assistance system concerning 2nd Embodiment. 14 is a flowchart showing a processing procedure in the system shown in FIG. 13. The functional block diagram which shows an example of the power consumption reduction assistance system concerning 3rd Embodiment. The flowchart which shows the process sequence in the system shown by FIG. The figure which shows the other example of a dimming pattern. The figure which shows an example of the building provided with a solar cell.

  FIG. 1 is a diagram illustrating an example of a system according to the embodiment. FIG. 1 shows an example of a power distribution network known as a so-called smart grid. The existing power transmission / distribution network connects existing power plants such as nuclear power, thermal power, and hydropower with a wide variety of consumers such as ordinary households, buildings, and factories. In addition to these, in the smart grid, distributed power sources that combine natural energy such as sunlight and wind power and storage batteries as new power sources, and new traffic systems and charging stations as new demands are connected to the power transmission and distribution network.

  A smart grid supervisory control system that efficiently links these new and old power supplies and demands is referred to as μEMS (Micro Energy Management System) (registered trademark). Furthermore, small-scale distributed power sources are also deployed on the customer side. For these controls, HEMS (Home Energy Management System) is introduced for general households, and BEMS (Building Energy Management System) is introduced for buildings. Is done. Furthermore, FEMS (Factory Energy Management System) is introduced for larger factories (not shown) to realize more detailed power control. At present, these systems are limited to the realization of autonomous energy management within the customer, but in the future, it is expected to play a role in energy management of the entire grid in cooperation with μEMS and the like.

  According to the above system, it is possible to perform a highly coordinated operation between an existing power plant, a distributed power source, and a customer. This minimizes the impact on the power system, and is a local energy supply system that incorporates abundant natural energy such as sunlight and wind power, or a customer-participation-type demand through smart two-way interconnection between consumers and power sources. New forms of power supply services such as responses will be created.

  In the next-generation power system, “demand response” that controls power consumption on the power demand side is assumed in order to stably operate the power system. The demand response means that the demand side responds to a request made from the supply side to the demand side using a communication environment established between the power supply side and the demand side.

[First Embodiment]
FIG. 2 is a functional block diagram illustrating an example of a power consumption reduction support system according to the first embodiment. In the embodiment, a configuration capable of prompting visualization by calculating an optimum value of a slat angle of a blind provided near a window of a building and transmitting it to a user is shown. By facilitating visualization, the system of the embodiment assists in reducing building power consumption. The blind can be regarded as an example of a light-shielding unit that is provided with the slat angle as a control amount and that can change the light-shielding amount.

  The system shown in FIG. 2 is formed with the server device 1 as a core. The server device 1 is positioned as a computer that supports reduction of power consumption in a building. The server device 1 is an information processing device (computer) installed on, for example, a rack base of an operation room in a building. In addition, the server device 1 can be installed and used in a data center or the like. The server apparatus 1 is connected to a user terminal 40 installed in a building on the power demand side and the power consumption reduction command unit 30 provided on the power supply side. For this connection, a dedicated line, a VPN (Virtual Private Network), a LAN (Local Area Network), or the like can be used.

  The server device 1 includes a building information input unit 11, an external light illuminance measurement unit 12, a power consumption reception unit 13, an optimum slat angle derivation unit 16, an indoor illuminance estimation unit 17, a power reduction possible amount estimation unit 18, an optimum setting notification unit 15, And the data transmission / reception part 14 is provided. Of these, the external light illuminance measuring unit 12 is externally attached via a communication line, so that the degree of freedom in arrangement increases.

The building information input unit 11, the external light illuminance measurement unit 12, and the power consumption reception unit 13 function as an input interface for information (data, control signals, etc.) given from the outside. The building information input unit 11 gives building information to the server device 1. Building information includes wall surface azimuth (direction of each surface of the building), blind slat width and slat spacing, blind installation surface (or blind surface) direction, blind characteristic information (external light (sky) for each blind slat angle This is information such as the relationship of illuminance due to solar radiation (generically referred to as blind characteristics), lighting characteristics (light flux of lighting equipment in a building, light distribution characteristics, power consumption, arrangement interval, illuminance setting value, etc.).
The building information input unit 11 may take the form of a user interface such as a keyboard or a mouse provided in the server device 1 or may be a disk medium in which necessary data is written or a storage medium such as a USB (Universal Serial Bus). May be. Or you may make it give building information to the server apparatus 1 using the user terminal 40. FIG.

  The external light illuminance measuring unit 12 is an illuminance sensor (lux meter) attached to, for example, an outer wall of a building, a window, or a partition wall of a room, and is an illuminance of light emitted from the outside or an adjacent room to the interior of the building. The light illuminance is measured as a sensor value.

  The optimum slat angle deriving unit 16, the indoor illuminance estimating unit 17, and the power reduction possible amount estimating unit 18 are arranged in accordance with, for example, a CPU (Central) of the server apparatus 1 (computer) along a command sequence described in a program loaded in the main memory. This is a software processing function realized by causing a processing unit to perform arithmetic processing. Other processing blocks, that is, the building information input unit 11, the external light illuminance measurement unit 12, the power consumption reception unit 13, the optimum setting notification unit 15, and the data transmission / reception unit 14 can also be realized as this type of processing module.

  The optimum slat angle deriving unit 16 reduces the indoor illuminance caused by outside light (light incident on the building from the outside, for example, sunlight) in a state in which direct solar radiation to the room where the blind is installed is suppressed, preferably in a blocked state. The optimum value of blind slat angle that can be secured to the maximum is calculated. In calculating the optimum value, a simulation technique can be applied.

  The optimum slat angle deriving unit 16 refers to the angle formed by the incident direction of the outside light and the blind surface, the azimuth data of the building, the blind characteristics, and the like, and calculates the optimum value based on these information.

  The optimum slat angle deriving unit 16 does not always calculate only the optimum value. In other words, the optimum slat angle deriving unit 16 recommends the blind slat angle for reducing power consumption based on at least one of the angle between the incident direction of the external light and the blind installation surface and the blind characteristic data. Is calculated. The recommended value may coincide with the optimum value, or may be a numerical value within a certain range including the optimum value.

  The room illuminance estimation unit 17 calculates the room illuminance due to the external light based on the external light illuminance (amount of solar radiation) and the blind external light introduction characteristic (one of the blind characteristics). The power reducible amount estimation unit 18 converts the amount of power that can be reduced by the lighting equipment in the room (the power reducible amount) into the room illuminance by the outside light calculated by the room illuminance estimation unit 17 and the room illuminance setting value. Calculate based on The data transmission / reception unit 14 transmits the calculated power reduction possible amount to the power consumption reduction command unit 30 as a host system that controls power reduction in each facility on the demand side via the communication network.

  The data transmission / reception unit 14 and the optimum setting notification unit 15 are interfaces responsible for a communication function between the server device 1 and its outside. The data transmission / reception unit 14 is responsible for exchanging data with the host control system including the power consumption reduction command unit 30. The optimum setting notification unit 15 transmits data such as the optimum value, recommended value, and dimming pattern of the slat angle to the user terminal 40. The user terminal 40 notifies the user of the notified data by displaying it on the screen.

The power reduction possible amount estimation unit 18 also calculates a dimming pattern of the indoor lighting device based on the room illuminance calculated by the room illuminance estimation unit 17. This dimming pattern is transmitted from the optimum setting notification unit 15 to the user via the user terminal 40.
The dimming pattern is information indicating which of a plurality of lighting devices to be turned on / off. If lighting devices (fluorescent lamps, LEDs, etc.) are arranged in an array, for example, a pattern in which lighting and extinguishing are repeated every other example is given as an example. Various dimming patterns (dimming modes) are conceivable depending on which lighting device is turned on / off.

Next, the operation of the above configuration will be described. In the following description, sunlight will be described as outside light.
FIG. 3 is a flowchart showing a processing procedure in the system shown in FIG. When the process is started, the server device 1 calculates the optimum slat angle of the blind (step S1). In this step, the optimum slat angle deriving unit 16 is based on the wall surface azimuth (direction of each surface of the building), the direction of the blind surface, the blind slat width and slat interval, and the total solar radiation measured by the external light illuminance measuring unit 12. Based on the illuminance of outside light and the like, the optimum value of the slat angle that can secure the maximum indoor illuminance by sky solar radiation while calculating the direct solar radiation into the room is calculated. Data required for calculating the optimum value is input to the server device 1 via the building information input unit 11.

  Next, the server device 1 calculates the room illuminance due to external light for each point in the room (step S2). This calculated value is positioned as an estimated value. In this step, the room illuminance estimation unit 17 calculates the room illuminance using the ambient light illuminance by the sky solar radiation measured by the ambient light illuminance measurement unit 12, the optimum slat angle calculated in step S1, and the blind characteristics. The blind characteristic used here is data indicating the relationship between the illuminance caused by outside light (sky radiation) and the slat angle of the blind, and is input to the server device 1 via the building information input unit 11.

  Next, the server apparatus 1 calculates a power reduction possible amount and a dimming pattern (step S3). In this step, the power reducible amount estimation unit 18 calculates a power reducible amount and a dimming pattern using the illumination characteristics and the current illumination power consumption. Illumination characteristics used here are a light flux, light distribution characteristics of each illumination device, power consumption, an arrangement interval of illumination devices, an illuminance setting value, and the like, which are input to the server device 1 via the building information input unit 11. The current lighting power consumption is the amount received by the power consumption receiver 13.

Next, the server device 1 transmits the power reduction possible amount calculated in step S3 from the data transmission / reception unit 14 to the power consumption reduction command unit 30 via the communication network (step S4).
Next, the server device 1 waits for a power reduction command from the power consumption reduction command unit 30 (step S5). When the power reduction command is received via the data transmission / reception unit 14 (YES in step S5), the server device 1 obtains the optimum blind slat angle calculated in step S1 and the dimming pattern of the lighting device calculated in step S4. Then, it transmits to the user terminal 40 via the optimum setting notification unit 15 (step S6). In response to this, the user terminal 40 informs the user of the optimum value of the slat angle and the dimming pattern by a monitor display or voice notification.

  FIG. 4 is a diagram illustrating an example of the screen display content on the user terminal 40. When the user terminal 40 receives the optimum value of the slat angle (here, 23 °), for example, a character display of “recommended slat angle: 23 °” or a slat angle under the processing by the installed software. A schematic diagram that visually shows the is displayed on the monitor screen.

  The screen display is positioned as a so-called operation guide for the user, and therefore the display content is not limited to the optimum value. Thus, the recommended value, a numerical value within a certain range including the optimum value, or a graphic image may be displayed. For example, in some cases, the slat angle may be displayed in three stages such as “fully open”, “half open”, and “fully closed”.

  In the embodiment, a personal computer terminal used by a blind operator (user) is assumed as the user terminal 40, but the present invention is not limited to this. For example, notification data (optimal slat angle, dimming pattern, etc.) may be transmitted to a mobile terminal carried by the user (such as a PDA (Personal Digital Assistant) or a mobile phone terminal) via a wireless channel. In short, the user terminal functions as a user interface between the control device 1 and the user. Next, the power consumption reduction support method in the embodiment will be described in detail.

<Calculation of optimum slat angle>
FIG. 5 is a diagram illustrating a state in which the blind is viewed from the side. The blinds are shown with a reference sign B. In FIG. 5, the right side from the blind shaft is the window side (outside), and the left side is the indoor side.
In general, the brightness of direct solar radiation from the sun is significantly higher than the brightness of lighting equipment. Therefore, if the direct solar radiation is taken into the room, people in the room feel glare and feel uncomfortable. Moreover, there is a concern that lighting by direct solar radiation with strong directivity makes the distribution of room illuminance non-uniform, and further causes an increase in air conditioning power consumption due to an increase in cooling load more than a reduction in illumination power due to lighting. Therefore, in the embodiment, the slat angle that can ensure the maximum room illuminance by sky solar radiation while avoiding direct solar radiation is calculated as the optimum value of the slat angle.
In order to calculate the optimum slat angle, the sun position is first set to the solar height h [degree: deg. ] And the solar incident angle φ [deg. ] Are specified as parameters. The relationship between the solar altitude h and the optimum slat angle of the blind will be described with reference to FIG.

  In FIG. 5, the solar incident angle φ = 0 [deg. ], That is, a state in which sunlight is incident perpendicular to the blind surface. In this state, the optimum blind slat angle is set so that the direct sunshine does not enter the blind slat angle θB [deg. ] Is set to the minimum.

  This is because, in order to maximize daylighting by sky solar radiation, it is necessary to maximize the visual field area that can be viewed from the inside of the room (minimize the blind slat angle). This is because sky solar radiation does not have directivity due to irregular reflection on the sky or the ground surface. As shown in FIG. 5, the optimum slat angle of the blind in this state is as follows. The direct sunshine is shielded at the window side end of the upper slat 303 and the indoor end of the lower slat 304, and the slat angle θB [deg. ] Is minimized.

In the following, the optimum slat angle θB [deg. ] And solar altitude h [deg. ], A more general relationship will be described. First, the vertical projection length a [mm] of the blind is defined as shown in Equation (1), and the horizontal projection length b [mm] as shown in Equation (2). Here, the slat width is S [mm].

According to the equations (1) and (2), the relationship of the solar altitude h corresponding to the blind optimum slat angle θB is expressed by the equation (3). Here, let Z be the slat interval.

From the relationship of Equation (3), Equation (4) is obtained for the optimum slat angle θB.

  The optimal slat angle can be calculated by solving Equation (4) for θB. Next, the solar incident angle φ [deg. The change in the optimum slat angle of the blind with respect to] will be described.

  FIG. 6 is a view showing a state in which the blind slat surface 401 is looked down from above. FIG. 6 shows the relationship between the solar incident angle φ and the total horizontal projection length on the blind slat surface of direct solar radiation.

Sun incident angle φ = 0 [deg. ], The total horizontal projection length of the direct solar radiation 403 on the slat surface is 2 · b [mm] (case in FIG. 5). Sun incident angle φ ≠ 0 [deg. ], The total horizontal projection length on the slat surface of direct solar radiation is (2 · b) / cosφ [mm]. When this relationship is incorporated into the equation (3), the solar altitude h corresponding to the blind optimum slat angle θB in consideration of the solar incident angle φ becomes the relationship of the equation (5).

From this relationship, Equation (6) is obtained for the optimum slat angle θB.

  The optimal slat angle can be calculated by solving Equation (6) for θB.

  FIG. 7 is a graph showing a relationship between the optimum slat angle θB and the solar altitude h under the first condition. In the first condition, the blind slat width S: 30 [mm], the slat interval Z: 30 [mm], and the sun incident angle φ = 0 [deg. ].

According to FIG. 7, the solar altitude h is 45 [deg. ] If it is above, the blind slat angle is set to 0 [deg. ] (Horizontal fully open). The solar altitude h is 45 [deg. ] If lower, the slat angle is adjusted according to the optimum slat angle transition. It can be seen that the optimal slat angle transition varies linearly with solar altitude.
Just before sunset or just after sunrise, the solar altitude h is 0 [deg. ], The blind slat angle is set to 90 [deg. ] (Vertical fully closed) to prevent direct solar radiation from entering the room.

  FIG. 8 is a graph showing a relationship between the optimum slat angle θB and the solar altitude h under the second condition. In the second condition, the blind slat width S: 40 [mm], the slat interval Z: 30 [mm], and the sun incident angle φ = 0 [deg. ].

  According to FIG. 8, the solar altitude h is about 37 [deg. ] If it is above, the blind slat angle is set to 0 [deg. ] (Horizontal fully open). The solar altitude h is about 37 [deg. If it is lower, the slat angle is adjusted according to the transition of the optimum slat angle. The solar altitude h is 0 [deg. ], The blind slat angle is about 50 [deg. It is possible to prevent direct solar radiation from entering the room. By calculating as described above, it is possible to calculate the optimum slat angle of the blind that can ensure the maximum illuminance of the external light by the sky solar radiation while blocking the direct solar radiation.

  In setting the slat angle, the ambient light illuminance (amount measured by the ambient light illuminance measurement unit 12) due to global solar radiation may be considered. In other words, if the value of the external light illuminance by the total solar radiation is not more than a certain threshold value, it is assumed that the direct solar radiation is shielded by the clouds, and the blind slat angle is set to 0 [deg. ]. Further, since the illuminance due to the reflected light of the lighting device can be expected at night, the blind slat angle is set to 90 [deg. ] (Vertically fully closed).

<About estimation of room illuminance>
Next, a procedure for calculating (estimating) room illuminance due to external light will be described. In this procedure, the external light illuminance measured by the external light illuminance measurement unit 12 using the relationship between the slat angle of the blind and the room illuminance due to external light (sky radiation) (blind characteristics, input by the building information input unit 11). And the room illuminance due to outside light is calculated based on the optimum slat angle calculated in step S1.

  FIG. 9 is a graph illustrating an example of the blind characteristic. This blind characteristic can be used for calculation of room illuminance. The blind characteristics shown in FIG. 9 indicate that the slat angle is 0 [deg. ] (Horizontal fully open) to 90 [deg. ] Shows the result of measuring the illuminance by only the outside light in the immediate vicinity of the blind when changing to (fully closed). The northern surface of the building in the northern hemisphere has the characteristic that there is little direct solar radiation and sky solar radiation is dominant.

  The blind characteristic is input to the building information input unit 11 as a function or a table. As shown in FIG. 9, the slat angle is 90 [deg. ], The illuminance bias IMIN [Lux: lx] corresponding to the state of [] may be arbitrarily set for each blind on each surface in consideration of the amount of transmission of direct solar radiation.

The blind characteristic shown in FIG. 9 has an optimum blind slat angle θB [deg. ], The reference illuminance IB [lx] for estimating the room illuminance due to external light is obtained by the equation (7).

Outside light varies depending on time and weather. Therefore, the slat angle when the blind characteristic is measured is set to 0 [deg. ], The maximum illuminance IMAX [lx] and the ambient light illuminance IOUT [lx] measured by the ambient light illuminance measurement unit 12 to correct the reference illuminance IB, and the ambient light in the immediate vicinity of the blind Is used to estimate the illuminance I0 [lx] by using the equation (8).

Using the illuminance I0 [lx] due to the ambient light in the immediate vicinity of the blind obtained by the equation (8), for example, by the equation (9), the room at an arbitrary point of the coordinates (Xp, Yp, Zp) [m] from the blind The illuminance IX [lx] is estimated.

  Here, a0 [m] indicates the X coordinate of the blind surface. FIG. 10 shows the positional relationship between a room arbitrary point for calculating the illuminance and the blind.

  FIG. 10 is a diagram for explaining the coordinates of an arbitrary point in the room when the reference coordinate system is fixed to the blind. In the equation (9), the reference coordinate system of FIG. 10 is used. For example, the position of an arbitrary point in the room can be expressed by setting an orthogonal X axis, Y axis, and Z axis with one vertex of a quadrilateral blind as the origin.

<Calculation of the amount of power that can be reduced by lighting equipment>
With the above procedure, the room illuminance IX [lx] due to external light can be calculated for any point in the room. Next, a procedure for estimating the amount of power that can be reduced by using the room illuminance IX at an arbitrary point will be described. There are cases where the indoor illuminance setting value IX-SP [lx] cannot be satisfied only by daylighting. Therefore, first, the device required illuminance IX-L [lx] required for the lighting device is calculated using Equation (10).

  The dimming pattern and power consumption of the lighting device can be estimated from the device required illuminance IX-L and the lighting characteristics input to the building information input unit 11. This will be described with reference to FIG.

  FIG. 11 is a diagram illustrating a relationship between illuminance and power consumption for different dimming patterns. FIG. 11 shows estimated information on the relationship between illuminance and power consumption due to illumination alone in each dimming pattern [differentiated as (1) to (4)].

  A dimming pattern (light-out pattern) that achieves the nearest illuminance while exceeding the device required illuminance IX-L [lx] calculated using Expression (10) is selected. The power consumption at this time is the power consumption Ei [kW] of the illumination system i.

The lighting power consumption E [kW] on the entire demand side is the total power consumption of all the lighting systems, and is expressed by Expression (11).

By using E [kW] in Equation (11) and the current illumination power consumption ER [kW] received by the power consumption receiver 13, the amount of illumination power reduction ΔE [kW] is obtained by Equation (12). Can be calculated.

  FIG. 12 is a diagram illustrating an example of the dimming pattern. FIG. 12 illustrates the difference in the dimming pattern according to the intensity of the external light illuminance. FIG. 12 shows the arrangement of lighting devices superimposed on a plan view of the room. The lighting equipment that is turned on is indicated by hatching. For example, three types of dimming patterns are shown according to the intensity of external light.

  Energy saving can be promoted by increasing the number of lighting devices to be turned off as the outside light increases. In each pattern, as shown in (in the outside light, strong), for example, it is better to turn on more lighting devices located far from the window. Since the external light illuminance has already been calculated, there is one type of dimming pattern transmitted to the user terminal 40.

  By operating the blind and setting the slat angle to the transmitted optimum slat angle, the user can take outside light to the maximum extent in the room. Therefore, power consumption can be reduced by dimming while satisfying the illuminance setting in the room.

  As described above, in the first embodiment, the ambient light illuminance due to sky solar radiation is measured by the sensor. Alternatively, the external light illuminance can be calculated by simulation based on time, building information, date and time, and the like. Based on the ambient light illuminance and the building information, an optimum value of the slat angle of the blind capable of taking in the maximum amount of outside light (skylight) while avoiding direct solar radiation into the room on each surface of the building is calculated.

  Next, the illuminance at each point in the room due to outside light when the slat angle is set to the optimum value is calculated, and based on this, the current lighting power consumption and the characteristics of the lighting equipment are used to calculate the convenience of the room (illuminance). The light attenuation pattern and the power reduction possible amount are calculated after ensuring the above. By transmitting this amount of power reduction possible to the outside (for example, the system that manages and controls equipment other than lighting and the system of the power company), the optimal power reduction is achieved as a total solution in a smart grid environment. Provide information for Further, for example, triggered by receiving a power reduction command from the outside, the calculated optimum slat angle is transmitted to the user, and the adjustment of the slat angle is urged.

  Of particular importance is the handling of room illuminance by external light. The room illuminance due to outside light varies greatly depending on the amount of solar radiation that varies depending on the weather and the slat angle of the blind. However, in order to grasp each blind slat angle, a large number of measuring devices are required, and burdens such as labor and cost are large.

  According to the first embodiment, by prompting the user to adjust the slat angle that is different for each blind to the optimum angle, a large number of measurement / control devices (blind angle sensors, illuminance meters at various positions in the room, dimming) It is possible to reduce the illumination power consumption as estimated in advance by ensuring the maximum illuminance by external light while eliminating the need for a controller or the like.

About 20% of electric power in office buildings is consumed by lighting equipment. According to the first embodiment, the illumination power can be suppressed by optimizing the blind slat angle, which can greatly contribute to the reduction of power consumption. In other words, by urging the user to set the blind slat angle to the optimum value, the maximum amount of outside light can be taken into the room, so that even if the illumination is dimmed, the indoor illuminance setting value is satisfied and accurate. Power consumption can be reduced. In other words, by promoting the visualization and promoting energy savings by notifying the user of the optimal blind angle and dimming pattern (information that the lighting equipment in this location can be turned off because only enough external light can be collected). Can do.
Furthermore, in the demand response environment, by estimating the room illuminance and the power consumption that can be reduced in advance, it is possible to perform accurate power control as estimated in advance while maintaining the convenience and comfort of the room.

  Accordingly, it is possible to provide a power consumption reduction support system, a power consumption reduction support device, a power consumption reduction support method, and a program that can suppress power consumption.

[Second Embodiment]
FIG. 13 is a functional block diagram illustrating an example of a power consumption reduction support system according to the second embodiment. In FIG. 13, parts common to FIG. 2 are given the same reference numerals, and only different parts will be described here. In the second embodiment, a building system including a dimming control unit for indoor lighting is assumed. The system further includes an indoor illuminance sensor (not shown) associated with the dimming control means. That is, in the second embodiment, a system is assumed in which the luminous flux of the lighting device is automatically controlled in order to keep the room illuminance measured by the room illuminance sensor at an appropriate value.

FIG. 14 is a flowchart showing a processing procedure in the system shown in FIG. Steps S11 to S15 are the same as steps S1 to S5 in FIG. That is, the power reduction possible amount estimation unit 18 in the control device 2 includes the illumination characteristics (such as the arrangement interval of the lighting equipment, the luminous flux, the light distribution characteristics, the power consumption, the illuminance setting value) input to the building information input unit 11, and Using the current illumination power consumption received by the power consumption receiver 13, the power reduction possible amount is calculated. This power reduction possible amount is transmitted to the power consumption reduction command unit 30 via the data transmission / reception unit 14.
In step S <b> 16 in FIG. 14, the optimum slat angle calculated by the optimum slat angle deriving unit 16 is notified to the user terminal 41 through the optimum slat angle notifying unit 19. The user terminal 41 notifies the user of the optimum slat angle.

  According to the second embodiment, in a system including an automatic control system that controls a lighting device, the optimum blind angle is calculated and transmitted to the user. In other words, the user simply sets the slat angle of the blind that can take in the maximum amount of outside light, and the control system function realizes the indoor illuminance environment as estimated in advance and the reduction of lighting power consumption by dimming It becomes possible. As described above, in addition to the same effects as those of the first embodiment, the user burden can be reduced.

[Third Embodiment]
FIG. 15 is a functional block diagram illustrating an example of a power consumption reduction support system according to the third embodiment. In FIG. 15, parts common to FIGS. 2 and 13 are given the same reference numerals, and only different parts will be described here.
The control device 3 illustrated in FIG. 15 includes a person presence / absence information receiving unit 20. The person presence / absence information receiving unit 20 detects the presence and absence of a person at any point in the room by using a camera, infrared rays, the state of each person's personal computer in the office room, a body temperature sensor, and the like. The arbitrary point here may be limited to a position close to the floor where a person is considered to exist.

  Furthermore, it is also possible to apply technology in the field of telephony, which has been remarkable in recent years. For example, in an IP (Internet Protocol) telephone system using SIP (Session Initiation Protocol), information including presence / absence of a person can be managed as presence management. By applying this, the presence / absence information of the person may be notified from the SIP server to the person presence / absence information receiving unit 20.

  FIG. 16 is a flowchart showing a processing procedure in the system shown in FIG. A characteristic point in this flowchart is that in the power reduction possible amount calculation processing in step S23, information indicating the presence / absence of a person is given to the power reduction possible amount estimation unit 18 in addition to the illumination characteristics and the illumination power consumption. . Based on these pieces of information, the power reducible amount estimation unit 18 calculates a power reducible amount and a dimming pattern. That is, in calculating the dimming pattern, it is only necessary to turn off the position where the person is absent mainly and turn on the position where the person exists.

  FIG. 17 is a diagram illustrating another example of the dimming pattern. FIG. 17 shows the difference between the intensity of external light illuminance and the dimming pattern depending on the position of the person. The position of a person is indicated by a vertically long ellipse. FIG. 17 shows three types of extinguishing patterns corresponding to the low to high external light. Since the external light illuminance has already been calculated, there is only one type of extinguishing pattern that is actually transmitted to the user.

  The lighting equipment nearest to the position where the presence of a person is confirmed is basically turned on, but in the vicinity of the window side, the indoor illuminance setting is often satisfied even if the light is reduced due to the influence of external light. For example, in a case where the outside light is strong, turning on the lighting device farthest from the window among the positions of the person can be said to be more intelligent control. As the illuminance of outside light weakens, it is efficient to light up the position of the person with priority.

  As described above, in the third embodiment, the dimming pattern of the lighting device and the power consumption at that time are calculated based on the room illuminance due to external light and the presence / absence information of the person. In this way, in addition to obtaining the same effect as in the first embodiment, further reduction in illumination power consumption is realized by fine dimming control according to the presence / absence situation of a person in the room. It becomes possible.

  The present invention is not limited to the above embodiments. For example, a curtain can be used as the light shielding means instead of the blind. In this case, the control amount may be the opening of the curtain or a combination of a plurality of curtains (such as a combination of a lace curtain and a light shielding curtain).

In the embodiment, sunlight is shown as an example of outside light, and the room illuminance by sky solar radiation is the subject of discussion. Not limited to this, the brightness of the lighting in the adjacent room, and lights such as street lamps and neon lights can be cited as examples of outside light at night.
Further, as the external light illuminance measurement unit 12, a solar cell attached to a building can be used.
FIG. 18 is a diagram illustrating an example of a building including solar cells. A solar cell 200 is attached to the roof or wall of the building, and its output is led into the room via a diode 150. The output of the diode is led to and stored in the storage battery 160, and is also supplied to each part of the room from the outlet C via the switchboard 180. Various controls are performed by the controller 170. The controller 170 may be connected to an illuminance sensor 4a that measures indoor illuminance. A solar cell can be mounted on the blind. In recent years, see-through solar cells have also been provided.

  In such a form, it is possible to measure the external light illuminance quantitatively and in real time by monitoring the output of the solar cell 200. Functions of the controller 170 such as the building information input unit 11, the power consumption receiving unit 13, the optimum setting notification unit 15, the data transmission / reception unit 14, the optimum slat angle deriving unit 16, the indoor illuminance estimation unit 17, and the power reduction possible amount estimation unit 18 Can be used as a control device according to the embodiment, and power consumption in the building can be reduced.

  Furthermore, it is possible to provide a room temperature sensor in the room and aim at energy saving from the viewpoints of both illumination and room temperature. In other words, excessive ambient light may cause the room temperature to rise excessively depending on the season, and the power consumption of the air conditioner may increase, making it uneconomical. To avoid this situation, a more intelligent system can be realized by incorporating a function that suppresses the rise in the room temperature while reducing the intake of outside light by closing many slats.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1, 2, 3 ... Server apparatus, 40, 41 ... User terminal, 30 ... Power consumption reduction command part, 11 ... Building information input part, 12 ... External light illuminance measurement part, 13 ... Power consumption receiving part, 16 ... Optimal slat angle Deriving unit, 17 ... Indoor illuminance estimating unit, 18 ... Electric power reduction possible amount estimating unit, 15 ... Optimal setting notification unit, 14 ... Data transmission / reception unit, 303 ... Upper slat, 304 ... Lower slat, 19 ... Optimal slat angle notification unit, DESCRIPTION OF SYMBOLS 20 ... Person presence / absence information receiving part, 200 ... Solar cell, 150 ... Diode, 160 ... Storage battery, 180 ... Switchboard, 170 ... Controller, 4a ... Illuminance sensor

Claims (32)

In the power consumption reduction support system that supports the reduction of power consumption in buildings,
A measuring unit for measuring the illuminance of outside light, which is the illuminance of light irradiated into the room of the building,
An indoor illuminance calculator that calculates the indoor illuminance by the light based on the measured external light illuminance;
A power consumption reduction support comprising: a power reducible amount calculating unit that calculates a reducible amount that is a reducible amount of power required for lighting based on the calculated indoor illuminance and the indoor illuminance setting value. system. 2. The power consumption reduction support system according to claim 1 , further comprising: a transmission unit that transmits a power reduction command to a host system that manages power reduction in each facility on the demand side, and transmits the reduction possible amount . Furthermore, it comprises a light-shielding means installed in the room and capable of changing the light-shielding amount,
3. The room illuminance calculation unit according to claim 1, wherein the room illuminance calculation unit calculates the room illuminance based on an introduction characteristic of light from the outside of the light shielding unit and the measured outside light illuminance . 4. Power consumption reduction support system. Further, based on at least one of the angle formed by the incident direction of the light and the installation surface of the light shielding means and the characteristic data of the light shielding means, a recommended value of the control amount for the light shielding means for reducing power consumption is obtained. A recommended value calculation unit to calculate,
The power consumption reduction support system according to claim 3, further comprising a notification unit that notifies the calculated recommended value . The recommended value calculation unit calculates an optimal value of the control amount that can ensure the maximum indoor illuminance by the light in a state in which direct solar radiation into the room is suppressed,
The power consumption reduction support system according to claim 4 , wherein the notification unit notifies a user of an operation guide for the light shielding unit including the optimum value . Further, a dimming mode calculation unit that calculates the dimming mode of the lighting device based on the calculated indoor illuminance and the indoor illuminance setting value;
The power consumption reduction support system according to claim 1, further comprising a notification unit that notifies the calculated dimming mode . Furthermore, it comprises a position specifying means for obtaining the position of a person existing in the room,
The power consumption reduction support system according to claim 6 , wherein the dimming mode calculation unit calculates a dimming mode of the lighting device based on a position of a person existing in the room . The building comprises solar cells;
The power consumption reduction support system according to claim 1, wherein the measurement unit measures the illuminance of outside light based on an output of the solar cell . In the power consumption reduction support device that supports the reduction of power consumption in buildings,
An indoor illuminance calculating unit that calculates the indoor illuminance by the light based on the external light illuminance measured by the measuring means that measures the external light illuminance that is the illuminance of the light irradiated into the room of the building;
A power consumption reduction support comprising: a power reducible amount calculating unit that calculates a reducible amount that is a reducible amount of power required for lighting based on the calculated indoor illuminance and the indoor illuminance setting value. apparatus. Furthermore, the power consumption reduction assistance apparatus of Claim 9 which comprises the transmission part which transmits the power reduction instruction | command and transmits the said reduction possible amount to the high-order system which manages the power reduction in each demand side installation . The indoor illuminance calculating unit calculates the indoor illuminance based on an introduction characteristic of light from the outside of a light shielding unit installed in the room and capable of changing a light shielding amount, and the measured external light illuminance. The power consumption reduction support device according to any one of 10 or 10 . Further, based on at least one of the angle formed by the incident direction of the light and the installation surface of the light shielding means and the characteristic data of the light shielding means, a recommended value of the control amount for the light shielding means for reducing power consumption is obtained. A recommended value calculation unit to calculate,
A user interface;
The power consumption reduction support apparatus according to claim 11, further comprising a notification unit that notifies the calculated recommended value via the user interface . The recommended value calculation unit calculates an optimal value of the control amount that can ensure the maximum indoor illuminance by the light in a state in which direct solar radiation into the room is suppressed,
The power consumption reduction support apparatus according to claim 12 , wherein the notification unit notifies a user of an operation guide for the light shielding unit including the optimum value . Further, a dimming mode calculation unit that calculates the dimming mode of the lighting device based on the calculated indoor illuminance and the indoor illuminance setting value;
The power consumption reduction support apparatus according to claim 9, further comprising a notification unit that notifies the calculated dimming mode . Furthermore, it comprises a position specifying means for obtaining the position of a person existing in the room,
The power consumption reduction support apparatus according to claim 14 , wherein the dimming mode calculation unit calculates a dimming mode of the lighting device based on a position of a person existing in the room . The power consumption reduction support apparatus according to claim 9, wherein the measurement unit measures the illuminance of the outside light based on an output of a solar cell provided in the building . In the power consumption reduction support method that supports the reduction of power consumption in buildings,
Measure the external light illuminance, which is the illuminance of the light radiated into the building interior,
Calculate the room illuminance by the light based on the measured outside light illuminance,
A power consumption reduction support method for calculating a reducible amount that is a reducible amount of power required for lighting based on the calculated indoor illuminance and the indoor illuminance set value . The power consumption reduction support method according to claim 17, further comprising transmitting a power reduction command and transmitting the reduction possible amount to a host system that manages power reduction in each facility on the demand side . The calculating of the room illuminance calculates the room illuminance based on a light introduction characteristic of a light blocking unit installed in the room and capable of changing a light blocking amount, and the measured outside light illuminance. Item 19. The power consumption reduction support method according to any one of Items 17 and 18 . Further, based on at least one of the angle formed by the incident direction of the light and the installation surface of the light shielding means and the characteristic data of the light shielding means, a recommended value of the control amount for the light shielding means for reducing power consumption is obtained. Calculate
The power consumption reduction support method according to claim 19, wherein the calculated recommended value is notified . Calculating the recommended value is to calculate the optimum value of the control amount that can secure the maximum indoor illuminance by the light in a state in which direct solar radiation into the room is suppressed,
21. The power consumption reduction support method according to claim 20 , wherein the notifying notifies a user of an operation guide for the light shielding means including the optimum value . Further, the dimming mode of the lighting device is calculated based on the calculated indoor illuminance and the indoor illuminance setting value,
The power consumption reduction support method according to claim 17 or 18, wherein the calculated dimming mode is notified . Further, the position of the person existing in the room is obtained,
23. The power consumption reduction support method according to claim 22, wherein calculating the dimming mode calculates the dimming mode of the lighting device based on a position of a person existing in the room . The power consumption reduction support method according to claim 17, wherein the measuring includes measuring the illuminance of external light based on an output of a solar cell provided in the building . A program executed by a computer that supports reduction of power consumption in a building,
Measure the external light illuminance, which is the illuminance of the light radiated into the building interior,
Calculate the room illuminance by the light based on the measured outside light illuminance,
A program for calculating a reducible amount, which is a reducible amount of power required for illumination, based on the calculated indoor illuminance and the indoor illuminance set value . Furthermore, the program of Claim 25 which transmits the electric power reduction instruction | command and transmits the said reduction possible amount to the high-order system which manages the electric power reduction in each demand side installation . The calculating of the room illuminance calculates the room illuminance based on a light introduction characteristic of a light blocking unit installed in the room and capable of changing a light blocking amount, and the measured outside light illuminance. Item 27. The program according to any one of items 25 and 26 . Further, based on at least one of the angle formed by the incident direction of the light and the installation surface of the light shielding means and the characteristic data of the light shielding means, a recommended value of the control amount for the light shielding means for reducing power consumption is obtained. Calculate
The program according to claim 27, wherein the calculated recommended value is notified . Calculating the recommended value is to calculate the optimum value of the control amount that can secure the maximum indoor illuminance by the light in a state in which direct solar radiation into the room is suppressed,
29. The program according to claim 28 , wherein the notifying notifies a user of an operation guide for the light shielding means including the optimum value . Further, the dimming mode of the lighting device is calculated based on the calculated indoor illuminance and the indoor illuminance setting value,
The program according to any one of claims 25 and 26, which notifies the calculated dimming mode . Further, the position of the person existing in the room is obtained,
The program according to claim 30, wherein calculating the dimming mode calculates the dimming mode of the lighting device based on a position of a person existing in the room . 27. The program according to claim 25, wherein the measuring measures the illuminance of external light based on an output of a solar cell provided in the building .

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