JP6158548B2 - Power supply system - Google Patents

Description

  The present invention relates to a power supply system that controls power supply to electrical equipment in a building.

  For example, in buildings (electric power consumers) such as ordinary households, if the total power consumption (total current consumption) exceeds the contracted power (contract amperage) with the power company, the power supply to the indoors will be cut off. An operating ampere breaker (hereinafter simply referred to as a breaker) is installed. For this reason, in general households, electric appliances that may be used at the same time are picked up beforehand, and the capacity with a certain margin (margin) is set as the contract power for the total amount of power consumption in those electric appliances. There are many.

If the contract power mentioned above can be kept low, the basic charge will be reduced, and the electricity charge can be reduced. However, the lower the contract power, the smaller the margin. Then, there is a possibility that the frequency of occurrence of a situation in which the power supply to the building is cut off due to the operation of the breaker with the total power consumption exceeding the contract power may increase. If such a situation occurs frequently, the comfort of the resident (user) is greatly impaired.
As a countermeasure against such problems, if you know the power usage status based on the output value of the wattmeter and the total power consumption is expected to exceed the contracted power, a device with a low priority registered in advance A technique for stopping the operation is considered (for example, see Patent Document 1).

JP 7-274394 A

  In the above-described conventional technology, control such as stopping the device is performed based on the result of predicting the power usage state. Therefore, when the prediction accuracy is low and the actual power usage state is different from the prediction, the operation of the breaker may not be avoided or the operation of the device that does not need to be stopped may be stopped.

  Even if the prediction accuracy is high, the above-described conventional technique has the following problems. That is, in the above-described conventional technology, every time the total power consumption is likely to exceed the contract power, the operation of the predetermined device (device having a low priority) is stopped. Although the priority is low, the resident will have a lot of discomfort if the number of available devices decreases frequently. In other words, the above-described conventional technique has a problem in that the comfort of the user is ensured.

  This invention is made | formed in view of the said situation, The objective is to provide the electric power supply system which can ensure a user's comfort, setting contract electric power low.

The power supply system according to claim 1 includes a measurement unit that measures power consumption of the electrical equipment in the building, and a control unit that controls power supply to the electrical equipment based on the measured value. When the use of a new electrical device (new device) is started, the control means is a total power consumption that combines the power consumption of the electrical device already in use (the device in use) and the power consumption of the new device. Is calculated (total power consumption calculation processing). When the calculated total power consumption is lower than the contract power with the power company, the breaker does not operate, and the control means supplies power to the new device.

  On the other hand, when the calculated total power consumption exceeds the contracted power, if the power supply to the new device is continued as it is, the breaker is activated and the power supply to the building is cut off. In this case, in order to supply power to the new device without operating the breaker, extra power (insufficient power) obtained by subtracting the contract power from the calculated total power consumption is required. Therefore, this means tries to generate the insufficient power as follows.

That is, when the calculated total power consumption exceeds the contract power, the control unit determines whether or not the insufficient power can be compensated by the distributed power obtained by performing the distributed power generation process (shortage adjustment). Judgment processing) . Min Distribution force worked out process, the electric power supplied to all or part of the use in the instrument, which is reduced by the process of working out the distribution power its use in the instrument until operable allowable limit value. Generally, an electrical device does not operate at all unless the same power consumption as that measured during normal operation is supplied, and operates even if the supply power is somewhat lower than the power consumption. In this means, the above-described distributed power twisting process is performed in consideration of such circumstances .

  When it is determined that the insufficient power can be compensated for in the above-described insufficient adjustment determination process, the control unit generates the distributed power by performing the distributed power generation process and then supplies power to the new device. In other words, if the power shortage can be compensated for by reducing the power supply to the equipment in use to the allowable limit value, the operation of all the equipment in use is maintained and the new equipment is operated while avoiding the operation of the breaker. It becomes possible. In addition, when it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, the control unit cuts off the power supply to the new device. In other words, if insufficient power cannot be compensated for by reducing the amount of power supplied to the equipment in use to the allowable limit, the new equipment cannot be operated, but the breaker is activated and power is supplied to the building. The situation of being blocked can be avoided.

  Therefore, according to this means, even when the contract power is set low, it is possible to reliably prevent a situation where the breaker is activated and the power supply to the building is cut off. Further, when the total power consumption is likely to exceed the contract power, an attempt is made to compensate for the insufficient power with the distributed power obtained by reducing the power supply amount to the device in use. If the shortage of electric power can be compensated, the new device can be operated while maintaining the operation of all the devices in use. In this case, the user's comfort is not impaired at all. In addition, new equipment cannot be used if insufficient power cannot be compensated for, but this means that new equipment cannot be used every time, so the user's discomfort can be alleviated to some extent. become. As described above, according to the present means, it is possible to obtain an excellent effect that the contract power is set low to reduce the electricity bill and the user's comfort can be ensured.

In addition , when it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, the control unit performs a device cutoff process and then supplies power to the new device. The device shut-off process is a process for grouping the devices in use so that the sum of the power consumption exceeds the shortage power, and shutting off the power supply to the devices of the group with the longest average usage time among those groups. When the power consumption of one in-use device exceeds the insufficient power, one group is constituted by the one in-use device.

  It is considered that the user feels uncomfortable if the device does not operate when trying to operate the device again. According to this means, even when the total power consumption is likely to exceed the contract power, the new device can be operated without fail, so that the comfort of the user is further reduced.

  However, in this case, power supply to other electrical devices is cut off instead of the new device. In this means, an electrical device that cuts off the power supply is determined as follows. In other words, it is unlikely that the user is paying attention to the devices that have been operating for a long time among the devices in use. Therefore, even when the operation of such a device is stopped, it is unlikely that the user's comfort is impaired. For this reason, this means cuts off the power supply to the device of the group having the longest average usage record time instead of the new device.

  In addition, the electric equipment whose power supply has been cut off in the above equipment shut-off process will be used again as a new equipment unless the user intentionally stops using it (for example, by unplugging the power cord from the outlet). become. In this case, if it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, in the subsequent device shutdown process, the power supply to the electrical device that has been shut off is performed in order to supply power to other electrical devices. The power supply is cut off. If such an operation is allowed, the electrical devices to be blocked frequently change. If it does so, operation | movement of each electric equipment in a building will become unstable, and there exists a possibility that a user's comfort may fall remarkably.

  Therefore, in this means, when the electrical device is shut off in the equipment shut-off process, the control means performs the equipment shut-off process even if the shut-down electrical equipment starts to be used as a new equipment until a certain time has elapsed since the shut-off time. Do not execute. In this way, even if an electrical device whose power supply has been interrupted is used as a new device, it will not be subject to the device shut-off process until a certain time has elapsed since the shut-off time. Does not occur frequently, and the operation of each electrical device in the building does not become unstable.

According to the means described in claim 2 , the control means excludes the electrical equipment set in advance as the shutdown protection equipment from the grouping target, that is, the target for shutting off the power supply, when performing the equipment shutdown processing. For example, lighting devices, personal computers (PCs), and the like are likely to have problems when power supply is interrupted regardless of the user's intention. Therefore, if these electric devices are set in advance as shut-off protection devices, the power supply will not be cut off unexpectedly by the device shut-off process, and the convenience for the user will be improved.

The figure which shows one Embodiment of this invention and shows the structure of an electric power supply system The figure which shows the mode when total power consumption falls below contract power The figure which shows the mode when total power consumption exceeds contract power The figure for demonstrating the grouping in an apparatus shutdown process Flow chart showing the overall flow of processing by the home controller Flow chart showing the contents of basic processing Flow chart showing contents of first power control process Flow chart showing contents of second power control process Flow chart showing contents of third power control process

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A power supply system 1 shown in FIG. 1 is installed in a house such as a general household, for example. The power supply system 1 supplies power supplied from a power supply source power system based on a power supply contract to a plurality of outlets 4 (four in FIG. 1) connected to an AC power line 3 wired in the building 2. The power is supplied to the electric equipment 5 (shown in FIG. 1). Examples of the electric device include a television (TV), a lighting device, a refrigerator, an air conditioner, a vacuum cleaner, and a personal computer (PC).

  The power supply system 1 includes a distribution board 6 and a home controller 7 (hereinafter also simply referred to as a controller 7). The AC power supplied from the lead-in line 8 is supplied to the outlet 4 through the distribution board 6, the controller 7, and the AC power line 3 (AC 100V). The distribution board 6 is provided with a breaker 9 that operates to cut off the power supply to the building 2 when the total power consumption in the building 2 exceeds the contracted power with the power company. A predetermined delay time exists between the time when the total power consumption exceeds the contract power and the time when the power supply is cut off by the operation of the breaker 9. In the present embodiment, this delay time is used to perform an insufficient adjustment determination process, a distributed power generation process, and a device shut-off process, which will be described later.

  The controller 7 has a function of turning on / off the power supply to the outlet 4 (permission / prohibition of power supply). The controller 7 also has a function of measuring the power consumption of the electric device 5 connected to the outlet 4 in the building 2 (corresponding to a measuring means), and a function of controlling the amount of power supplied to the electric device 5 based on the measured value. (Corresponding to the control means).

  The controller 7 having such a function controls the power supply to the electrical equipment 5 connected to the outlet 4 in the building 2 as follows. That is, when the use of a new electrical device 5 (new device) is started, the controller 7 adds the power consumption of the electrical device 5 (used device) already used at that time and the power consumption of the new device. The calculated total power consumption is calculated (total power consumption calculation process). Note that “use of a new electric device 5 is started” means that the plug of the power cord of the electric device 5 that has not been used until that time is plugged into the outlet 4. As shown in FIG. 2, when the calculated total power consumption is lower than the contract power, the breaker 9 does not operate, so the controller 7 permits power supply to the new device.

  On the other hand, as shown in FIG. 3 (a), when the calculated total power consumption exceeds the contracted power, if the power supply to the new equipment is continued as it is, the breaker 9 operates and the inside of the building 2 The power supply to is cut off. In this case, in order to supply power to the new device without operating the breaker 9, extra power (insufficient power) obtained by subtracting the contract power from the total power consumption is required. Therefore, the controller 7 performs an insufficient adjustment determination process and tries to generate the insufficient power.

  The shortage adjustment determination process is a process for determining whether or not the shortage power can be compensated by the distribution power obtained by performing the distribution power generation process. The distributed power generation process is a process for generating distributed power by reducing the power supply amount to all or a part of the in-use device to an allowable limit value at which the in-use device can operate (FIG. 3B). )reference). In FIG. 3B, the distributed power that can be twisted in each in-use device is indicated by hatching. In general, the electric device 5 does not operate at all unless the same power as that measured during normal operation is supplied, and operates even if the supplied power is somewhat lower than the above-described power consumption.

  In the present embodiment, the distributed power twisting process is performed in consideration of such circumstances. In addition, the allowable limit value described above, that is, the range (margin) in which the supplied power may be reduced is different for each electric device 5. However, it is considered that most electric devices 5 operate even when the power supply amount decreases by about 1 to several percent. Therefore, in the present embodiment, in the distributed power generation process, when the power supply amount to the device in use is reduced, the power is uniformly reduced by 1%.

  When insufficient power can be compensated for by reducing the power supply amount to some in-use devices, it is not necessary to reduce the power supply amount to other in-use devices. Therefore, in this embodiment, the shortage adjustment determination process is performed in the following procedure. That is, the distributed power that can be generated from each of the devices in use is obtained, and the obtained distributed powers are sequentially added one by one. In this case, the power is summed in order from the distributed power generated by the device having a long usage time.

  Then, when the combined distributed power reaches the shortage power, it is determined that the shortage power can be compensated. In this case, in the distributed power generation process executed thereafter, the shortage of electric power is compensated for by reducing the amount of power supplied to the in-use device that is the combined power generation source. Further, if the distribution power that can be generated from all the devices in use is not enough even if the distribution power is not enough, it is determined that the distribution power generation process cannot compensate for the insufficient power. In this case, the device shut-off process described later is performed without performing the distributed power twisting process.

  When the controller 7 determines that the insufficient power can be compensated for in the shortage adjustment determination process, the controller 7 generates the distributed power by performing the distributed power generation process, and then supplies power to the new device. Further, when the controller 7 determines that the insufficient power cannot be compensated for in the shortage adjustment determination process, the controller 7 performs a device shut-off process and then supplies power to the new device.

  Device shut-off processing is a process of grouping so that the sum of power consumption exceeds the shortage power for devices in use, and shutting off power supply to the devices of the group with the longest average usage time among those groups ( (See FIG. 4). In the case of the example illustrated in FIG. 4, the devices B, E, and F in use each constitute one group because the power consumption by themselves exceeds the insufficient power (see FIG. 4A). (See FIG. 4 (b)). That is, in this case, one group is constituted by one device in use.

  On the other hand, since the devices A, C, D, and G in use are less than the shortage of power consumption alone (see FIG. 4 (a)), a combination (A + D, C + G) (see FIG. 4B). That is, in this case, one group is constituted by a plurality of devices in use. The above-mentioned average use actual time is an average value of use actual times of devices in use in the same group. Therefore, when one group is constituted by a single in-use device, the actual use time of the in-use device becomes the average actual use time.

  Note that the electric device 5 whose power supply has been cut off in the above-described device cut-off process is again used as a new device unless the user stops using it (for example, by unplugging the power cord from the outlet 4). Will be. In this case, when it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, another electrical device 5 is used to supply power to the electrical device 5 that has been interrupted in the subsequent device shutdown process. The power supply to will be cut off. If such an operation is allowed, the electrical device 5 to be blocked frequently changes. If it does so, operation | movement of each electric equipment 5 in the building 2 will become unstable, and there exists a possibility that a user's comfort may fall remarkably.

  Therefore, in this embodiment, when the controller 7 shuts off the electrical device 5 in the device shut-off process, even if the shut-off electrical device 5 starts to be used as a new device until a certain time has passed since the shut-off time, Do not execute the blocking process. In this way, even if the electrical device 5 whose power supply has been interrupted is used as a new device, it is not subject to the device shut-off process until a certain time has elapsed since the shut-off time. Is not frequently changed, and the operation of each electric device 5 in the building 2 is not unstable.

Next, each process by the controller 7 having the above configuration will be described in detail.
The controller 7 executes a series of processes shown in the flowchart of FIG. 5 for each predetermined control cycle. As shown in FIG. 5, the controller 7 first executes basic processing (step S1). As shown in FIG. 6, when basic processing is started, power is supplied to all outlets 4 (step T1). However, the power supply is performed only for a predetermined time to the outlet 4 that has not been used up to that point (zero power consumption). The predetermined time is set to a time shorter than the delay time described above (the time from when the total power consumption exceeds the contract power until the breaker 9 is activated).

  Subsequently, the power consumption of each outlet 4 is measured (step T2), and the presence / absence of the electric device 5 connected to the outlet 4 is determined based on the measured value (step T3). In this case, it is determined that some electrical device 5 is connected to a non-zero power outlet, and it is determined that the electrical device 5 is not connected to a zero power outlet. Thereafter, it is determined whether or not the electrical device 5 whose connection has been confirmed is a device in use (step T4).

  The device in use is an electrical device 5 that has already been confirmed to be connected (used) in the previous control cycle. Although the details will be described later, the electrical device 5 whose connection has been confirmed in a certain control cycle is configured so that the power consumption and the power consumption are reduced by the processing in the control cycle (step U5 in FIG. 7, step V8 in FIG. 8, and step W6 in FIG. 9). It is registered in the in-use device DB together with device information for specifying the device such as connection time (cumulative time). Therefore, here, the electric device 5 is in use depending on whether or not any of the devices registered in the in-use device DB matches the electric device 5 whose connection has been confirmed in the current control cycle. It can be determined whether or not the device.

  Of the electrical devices 5 that have been confirmed to be connected, for the electrical device 5 determined to be in use, the device information related to the electrical device 5 recorded in the in-use device DB is updated. On the other hand, of the electrical devices 5 that have been confirmed to be connected, the electrical device 5 that is determined not to be in use is determined to be a new device. Subsequently, the new device is a device that has actually started to be used (referred to as a genuine new device), or a device whose power supply has been cut off by the device cut-off process is reconnected (reconnection) It is determined whether it is called a device (step T5). Although details will be described later, the electric device 5 whose power supply has been cut off by the device cut-off process within the past several hours (for example, 1.5 hours) is registered in the cut-off device DB together with the device information. ing.

  Therefore, here, the electric device 5 is determined to be a genuine new device and a new device depending on whether or not any device registered in the shut-off device DB matches the electric device 5 determined to be a new device. It can be determined which of the connected devices. Specifically, if there is a device that matches the electrical device 5 among the devices registered in the shut-off device DB, it is determined that the electrical device 5 is a reconnection device, and there is no device that matches. The electric device 5 is determined to be a genuine new device.

  When finishing the basic process, the controller 7 executes the first power control process (step S2 in FIG. 5). As shown in FIG. 7, when the first power control process is started, it is first determined whether or not there is a new device among the devices whose connection has been confirmed in the basic process (step U1). When there is no new device (NO), a series of processing ends without performing the subsequent processing (end). On the other hand, when there is a new device (YES), the total value of the power consumption of all devices in use is calculated (step U2). Subsequently, it is determined whether or not the total power consumption obtained by adding the power consumption of the new device to the sum of the power consumption of the devices in use calculated in Step U2 is less than the contract power (Step U3).

  When the total power consumption exceeds the contract power (“NO” in step U3), the first power control process is terminated (return), and the process proceeds to a second power control process described later. On the other hand, when the total power consumption is lower than the contract power (“YES” in step U3), power supply to the new device is permitted (step U4). Thereafter, the new device whose power supply is permitted is registered in the in-use device DB as the in-use device together with the device information (step U5). When step U5 is executed, a series of processing ends without performing the subsequent processing (end).

  If the controller 7 determines that the total power consumption exceeds the contract power (NO) in step U3 of the first power control process, the controller 7 executes the second power control process (step S3 in FIG. 5). As shown in FIG. 8, when the second power control process is started, first, the insufficient power obtained by subtracting the contract power from the total power consumption is calculated (step V1). Subsequently, distributed power that can be twisted out from each of the devices in use is obtained (step V2). Then, among the devices in use, the distributed power generated by the device with the longest usage time is excluded from the devices set as non-summation targets described later, and is added to the total distributed power value (initially zero). (Step V3). Here, the in-use device to which the distributed power has been summed is set as a non-summation target that is not subject to summation when step V3 is executed again (step V4).

  Thereafter, it is determined whether or not the total distributed power value is greater than or equal to the insufficient power (step V5). When it is determined that the total distributed power value is equal to or greater than the insufficient power (YES), the process proceeds to Step V6. When the process proceeds to step V6, insufficient power is compensated for by performing distributed power generation processing that reduces the amount of power supplied to the in-use device that is the source of the combined distributed power generation. Then, power supply to the new device is permitted (step V7). Thereafter, the new device whose power supply is permitted is registered in the in-use device DB as the in-use device together with the device information (step V8). When step V8 is executed, a series of processing ends without performing the subsequent processing (end).

  On the other hand, if it is determined in step V5 that the total distributed power value is less than the insufficient power (NO), the process proceeds to step V9. In step V9, it is determined whether or not all in-use devices are set as non-summation targets, that is, whether or not the distributed power generated by all in-use devices has been summed up. When it is determined that the distribution power generated by all the devices in use is not added (NO), steps V3 to V5 are executed again. In addition, when it is determined that the distributed power generated by all the devices in use is added, the second power control process is ended (return), and the process proceeds to a third power control process described later.

  When it is determined that the distributed power generated by all the devices in use is added (YES) in Step V9 of the second power control process, the controller 7 executes the third power control process (Step S4 in FIG. 5). . As shown in FIG. 9, when the third power control process is started, first, it is determined whether or not a genuine new device exists in the new device (step W1). If a genuine new device does not exist (NO), that is, if the new device is a reconnection device, a series of processing ends without performing the subsequent processing (end). On the other hand, if there is a genuine new device (YES), the devices in use are grouped as described above (step W2). Then, among all the groups, the group with the longest average usage record time is selected, and the power supply to the electric equipment 5 constituting the group is cut off (step W3).

  After that, the electric device whose power supply is cut off in step W3 is registered in the cut-off device DB as the cut-off device together with the device information (step W4). Then, power supply to the new device is permitted (step W5). Thereafter, the new device for which power supply is permitted is registered in the in-use device DB as the in-use device together with the device information (step W6). When step W6 is executed, a series of processing ends (end).

As described above, according to the present embodiment, the following effects can be obtained.
The controller 7 checks the presence / absence of the electrical equipment 5 connected to the outlet 4 and its power consumption at each control cycle, and the use of the electrical equipment 5 is newly started, so that the total power consumption in the building 2 is reduced. If it is determined that it exceeds the contract power, the shortage will be compensated as follows. That is, when the controller 7 can compensate for the insufficient power by the distributed power generated by reducing the power supply amount to all or a part of the devices in use to an allowable limit value at which the devices in use can operate, Supply power to new equipment after reducing power supply to equipment in use. As a result, it is possible to maintain the operation of all the devices in use and operate the new device while avoiding the operation of the breaker. In addition, if the controller 7 determines that the power shortage cannot be compensated for even if the power supplied to all the devices in use is reduced, the group is set so that the sum of the power consumption for the devices in use exceeds the power shortage. The power supply to the new device is performed after the power supply to the device of the group with the longest average usage record time is cut off.

  Therefore, according to this embodiment, even when the contract power is set low, it is possible to reliably prevent a situation where the breaker 9 is activated and the power supply to the building 2 is cut off. In addition, if the total power consumption is likely to exceed the contracted power, if it is possible to make up for the shortage with the distributed power obtained by reducing the power supply to the devices in use, all in use A new device can be operated while maintaining the operation of the device. In this case, the user's comfort is not impaired at all. In addition, when the insufficient power cannot be compensated with the distributed power, the power supply to the new device is performed by cutting off the power supply to the device in use. Thus, according to the present embodiment, it is possible to obtain an excellent effect that the contracted power is set low to reduce the electricity bill and the user's comfort can be ensured.

  When the user tries to operate the electric device 5 anew, it is considered that the user will feel uncomfortable if the device does not operate. According to the present embodiment, even when the total power consumption is likely to exceed the contract power, the new device can be operated without fail, so that the user's comfort is further reduced. In this case, in place of the new device, the power supply to the electric device 5 of the group having a long average usage history time among the groups whose combined power consumption exceeds the shortage power is cut off. However, even when the operation of the electric device 5 is stopped, it is unlikely that the user's comfort is immediately lost. The reason is as follows.

  That is, the electrical equipment 5 used in general households includes audiovisual (TV, audio, radio, personal computer, etc.), light source (lighting equipment), and heat source / environment (air conditioner, heater, air cleaner, humidifier). Etc.). Among these, even if the operation of the heat source / environment-related electrical device is stopped after being operated for a long time, its comfort is not immediately lost, and it can be said that there is residual comfort. For example, in the case of an air conditioner, the room is controlled to a comfortable temperature (and humidity) by operating for a long time. In this state, when the power supply to the air conditioner is cut off and the operation is stopped, the room temperature gradually changes, and after a certain amount of time has passed, the comfort is lost (feels uncomfortable). In other words, even if a heat source / environment-related electrical device such as an air conditioner is operated for a long time and the power supply is cut off and the operation stops, the comfortable state is not immediately impaired.

  And since such heat source / environment-related electrical devices have relatively large power consumption, there is a high possibility that the power consumption alone will exceed the shortage power, and there is a possibility of forming a group independently in the device shutdown processing. high. Therefore, in the device shut-off process, the power supply to the heat source / environment-related electrical device that has been operating for a long period of time instead of a new device is often interrupted. For this reason, even if the power supply to the electrical equipment 5 of the group with a long average use actual time among the groups in which the total power consumption exceeds the shortage power is cut off instead of the new equipment, the comfort of the user It can be said that there is a low possibility that the sex will be impaired.

The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following modifications or expansions are possible.
If the controller 7 determines that the insufficient power cannot be compensated for in the shortage adjustment determination process, the controller 7 may cut off the power supply to the new device. That is, instead of the third power control process shown in FIG. 5, a process of “cutting off the power supply to the new device” may be performed. In this case, although a new device cannot be operated, the situation where the breaker is activated and the power supply to the building 2 is interrupted can be avoided. In addition, in this case, the new device cannot be used if the insufficient power cannot be compensated for by the distributed power. However, the new device cannot be used every time, so that the user feels uncomfortable. Will be alleviated to some extent.

  When the controller 7 determines that the insufficient power cannot be compensated for in the shortage adjustment determination process, the controller 7 performs the device shut-off process without performing the distributed power twisting process. Processing may be performed. In this case, the insufficient power when the device shut-off process is performed is a power obtained by subtracting the distributed power generated by the distributed power generation process from the power obtained by subtracting the contract power from the total power consumption. Therefore, if the above change is made, there is an effect that the number of devices whose power supply is cut off by the device cut-off process is reduced depending on the value of the insufficient power.

  For example, when the electric power supply is interrupted regardless of the user's intention, the user's comfort is likely to be impaired in the audiovisual-related and light source-related electrical devices 5. This is because these electrical devices 5 do not have the remaining comfort as described above. Therefore, it is preferable to add a function of setting a predetermined electrical device 5 as a shut-off protection device in advance according to a user's operation. In this case, when performing the device shut-off process, the controller 7 excludes the electrical device 5 set as the shut-off protection device from the grouping target, that is, the target for shutting off the power supply. In this way, the user's convenience is improved because the electric power supply 5 that the user has previously set as the cut-off protection device is not unexpectedly cut off by the device cut-off process. .

  In the drawings, 1 is a power supply system, 2 is a building, 5 is an electrical device, and 7 is a home controller (measuring means, control means).

Claims (2)

A measuring means for measuring the power consumption of the electrical equipment in the building;
Control means for controlling power supply to the electrical equipment based on the measurement value of the measurement means;
With
The control means includes
When the use of a new electric device is started,
Total power consumption for calculating the total power consumption of the power consumption of the in-use device that is already used at that time and the power consumption of the new device that is the newly started electrical device Perform the calculation process,
If the calculated total power consumption is less than the contract power with the power company, supply power to the new device,
If the calculated total power consumption exceeds the contracted power, the power supply amount to all or a part of the used devices is reduced to an allowable limit value at which the used devices can operate, and the distributed power is reduced. Performing the shortage adjustment judgment process for judging whether or not the shortage power obtained by subtracting the contract power from the total power consumption can be compensated by the distributed power obtained by performing the twisted power distribution process.
When it is determined that the insufficient power can be compensated in the insufficient adjustment determination process, the distributed power is generated by performing the distributed power generation process, and then the power is supplied to the new device.
When it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, the power supply to the new device is shut off,
Further, the control means includes
When it is determined that the insufficient power cannot be compensated for in the shortage adjustment determination process, grouping is performed so that the total power consumption exceeds the insufficient power for the devices in use, and the average usage of those groups After performing device shutdown processing to shut off power supply to the device of the group with the longest track record time, supply power to the new device,
When the electrical device is shut off in the device shut-off process, the device shut-off process is not executed even if the shut-down electrical device starts to be used as a new device until a certain time has elapsed since the shut-off time. A featured power supply system. The control means includes
2. The power supply system according to claim 1 , wherein when performing the device shut-off process, an electrical device set in advance as a shut-off protection device is excluded from the grouping target.

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