JP2009273262A - Supply current controller of electric device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller for suppressing consumption current of an electric device where a fault does not occur in an operation state even if consumption current is suppressed and reliably avoiding an operation of a breaker when the breaker operates by starting a new operation of the electric device. <P>SOLUTION: The controller includes a decision part 12 for deciding whether the breaker (3) operates when the electric device 2x connected to the controller 1x starts the new operation, an operation state acquisition part 13 for acquiring operation state information of the other electric device 2a connected to the other controller 1a and a suppression device selecting part 14 deciding the electric device and a suppression current value for suppressing consumption current in accordance with acquired operation state information. Current restriction control is instructed to a current controller to which the selected electric device is connected so that supply current does not exceed a restriction value in accordance with the suppression current value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power supply system that controls the current of an electrical device, and in particular, suppresses the current consumption of each electrical device so that the total current value of a plurality of electrical devices does not exceed the rated current value of the breaker. The present invention relates to a control device that avoids operation.

  Current (electric power) is supplied to electric devices such as computers, air conditioners, microwave ovens, and electric cookers through breakers. The breaker uniformly cuts off the current supplied to the electrical device when the total amount of current supplied to the electrical device exceeds a predetermined rated current value (contract power).

If the breaker uniformly cuts off the current supplied to the electrical equipment, it may cause a malfunction or failure depending on the electrical equipment. For example, if the operating computer is turned off by the breaker, the files in the storage device inside the computer may be destroyed and the computer may not be restarted.
Therefore, for example, Patent Document 1 discloses a power control system that avoids the operation of the breaker by controlling the amount of current of each electric device so that the total current value supplied to the electric device does not exceed the rated current value of the breaker. Patent Document 2 discloses this.

  In Patent Document 1, in an electrical installation including a plurality of electrical devices, before a certain electrical device starts a new operation, the other electrical device is instructed to execute a current saving operation, and the total consumption of the other electrical device is disclosed. A technique for avoiding the operation of the breaker by performing power control for reducing the power is disclosed.

Further, in Patent Document 2, electric devices communicate with each other so that each electric device performs power control, which is called 1 / f fluctuation control, averages the total current consumption value of the electric devices, and shuts off the breaker (operations). ) Is disclosed.
JP 2004-363661 A JP 2004-360930 A

  However, in the systems disclosed in Patent Literature 1 and Patent Literature 2, an electrical device that starts a new operation does not select an electrical device that suppresses power consumption (current consumption). Therefore, if power consumption is suppressed, power consumption is uniformly suppressed even for inconvenient electrical equipment such as an electric rice cooker during cooking or a microwave oven during cooking.

  Similarly, an electrical device that starts a new operation only unilaterally instructs other electrical devices to reduce power consumption. Therefore, even if another electrical device that has received the instruction executes the power saving operation, it is not known whether the power consumption can be suppressed as expected, and as a result, the electrical device performs a new operation without operating the breaker. There is no guarantee that you can start.

  The present invention has been made in view of such circumstances, and when a breaker operates by starting a new operation of an electrical device, a device and a suppression amount that suppress current consumption are preferably selected. An object of the present invention is to provide a control device that can suppress current consumption and reliably avoid the operation of a breaker.

  A first technical means is a control device for a power supply system that controls a supply current of a plurality of electric devices that receive power supply via a breaker so as not to exceed a rated current value of the breaker, and is connected to the control device When an electric device that has been started starts a new operation, a determination unit that determines whether or not the breaker operates and an operation state acquisition that acquires operation state information of another electric device connected to another control device And a suppression device selection unit that determines a suppression current value according to the acquired operating state information, and the suppression is selected in the current control device to which the selected electrical device is connected. The control device is configured to instruct current limit control so that the supply current does not exceed the limit value according to the current value.

  According to a second technical means, in the first technical means, the operation state information includes suppressable current value information corresponding to an operation state of the other electric device.

  According to a third technical means, in the first technical means, the control device calculates a controllable current value of the electrical device corresponding to an operating state of the electrical device connected to the current control device. A value calculation unit is provided.

  According to a fourth technical means, in the third technical means, the control device monitors the current control device instructing the current limit control, and is connected to the current control device during execution of the current limit control. It is characterized in that the current value that can be suppressed by the electric device is set to zero.

  According to a fifth technical means, in the first technical means, the control device monitors the current limit control and also monitors a current value supplied via a breaker, and the current value is equal to or greater than the suppression current value. When the voltage drops, the current limit control is released.

  According to a sixth technical means, in any one of the first to fifth technical means, the control device is provided for each of the current control devices.

  According to the present invention, it is possible to reliably avoid the operation of the breaker when the electric device performs a new operation. In addition, since an electrical device that does not cause inconvenience in the operating state even when current consumption is suppressed is preferably selected, user convenience is improved.

<Example 1>
FIG. 1 illustrates the electrical equipment of a customer for explaining a control device according to the present invention.
1 (1a to 1d, 1x) in the figure is a control device for the electric equipment 2 (2a to 2d, 2x). When the electric equipment 2x starts a new operation, it is determined that the breaker operates. Perform current control according to the procedure.
First, the operating state of another electrical device controlled by the control device is acquired from another control device connected via the network N.
The control device 1x suppresses the current of the electric device 2a to the control device 1a connected to the selected electric device 2a, for example, assuming that the electric device 2a that can suppress the current is selected according to the acquired operating state. To instruct. That is, the controller of another electrical device is instructed to execute the current saving operation in cooperation between the electrical devices.

  Here, the start of a new operation means not only to turn on the power of the electric device and execute the function of the electric device, but also to change the operation of the electric device. Specifically, the start of a new operation means that, in the case where the electrical device is an air conditioner, for example, the air conditioner is turned on and the air conditioner in operation is in a function of blowing air. It also means changing the execution function from execution to execution of the cooling function.

Specifically, the electric equipment 2 (2a to 2d, 2x) is a computer, an air conditioner, a refrigeration facility, a microwave oven, an electric cooker, an electric kettle, an electric rice cooker, an electric water heater, a TV, a hot carpet, and dishwashing. These are all devices that operate on electricity, such as dryers, clothes dryers, and vacuum cleaners.
In FIG. 1, the control device is provided for all the electrical devices, but the control device may be provided only for an electrical device that can effectively suppress current, for example, an electrical device such as an air conditioner or a refrigeration facility.
In the following description, it is assumed that the electric device 2x starts a new operation, and the other electric devices (2a to 2d) are executing the functions of the other electric devices (in operation).

3 in the figure is a breaker. 4 in the figure is an ammeter, which measures the total current value of an electric device operating under the ammeter, and returns the measured total current value in response to a request from the control device 1. .
Moreover, the control apparatus 1, the electric equipment 2, the breaker 3, and the ammeter 4 are connected to the power line E (solid line) as shown in FIG. 1, and the control apparatus 1 and the ammeter 4 are also connected to the network N (dotted line). Yes.

FIG. 2 is a block diagram for explaining the control device 1 according to the present invention.
10 in the figure is a control unit, and when the electric device 2 starts a new operation (power-on, operation change), it detects the start or executes control processing of each functional block described later.

(Start of new operation in electrical equipment)
First, a functional block group related to processing executed when a new operation is started in the electrical device 2x will be described.
11 in the figure is a current information acquisition unit. When the control unit 10 detects the start of a new operation of the electric device 2x, the total current value information of the ammeter 4 is acquired via the network I / F 22, Store in the memory 21. It is assumed that the rated current value of the breaker is also stored in the memory 21. The rated current value may be acquired from the ammeter 4 or may be set in the memory 21 when the control device 1 is installed.

Reference numeral 12 in the figure denotes a determination unit, which determines whether or not the breaker operates when the electric device 2x connected to the control device 1x starts a new operation. Specifically, the sum of the current value required for the electric device 2x to start a new operation and the total current value of the other electric devices stored in the memory 21 is the sum of the breaker stored in the memory 21. If the current is higher than the rated current value, it is determined that the breaker operates.
The current value necessary for the electric device 2x to start a new operation is stored in the memory 21 corresponding to the new operation type.

  13 in the figure is an other device operation state acquisition unit, and when the determination unit 12 determines that the breaker operates when the electric device 2x starts a new operation, other electric devices (2a to 2d) The operation state table (see FIG. 3) to be described later indicating the operation state information of the device is acquired from the control devices (1a to 1d). In other words, the determination unit 12 transmits an instruction signal instructing the control device connected to another electric device to transmit the operation state table, and connects to the other electric device that has received the instruction signal. The operation state table transmitted from the control device is received and stored in the memory 21.

(Operation status table)
Here, the operation state table will be described.
FIG. 3 is a diagram showing an example of the operation state table 200. 201 in the figure is an ID column in which an ID for identifying an operating electrical device is set. Note that a control device connected to an electrical device that can be identified by the ID can also be identified by the ID.
In the figure, reference numeral 202 denotes a suppressable current value column, in which suppressable current value information corresponding to the operating state of another electrical device is set. That is, the operation state information (operation state table 200) includes current value information that can be suppressed corresponding to the operation states of other electrical devices.
Specifically, as will be described later, a current consumption value that can be suppressed by the electric device identified by the ID in the ID column 201 is set. Even if the electric device suppresses the current corresponding to the current value, there is no particular influence (problem) on user comfort / operation of the device.

FIG. 4 is a diagram showing an example of a suppressable current value determination table 300 that is referred to when determining the suppressible current value set in the suppressible current value column 202.
In the operation state column 300a of the table 300, an operation state indicating the operation state of the electric device 2 is set, and in the consumption current value column 300b, a consumption current value consumed when the operation state is executed is set and suppressed. In the possible current value column 300c, a current value that can be suppressed during execution of the operation state is set.
The operation state table creation unit of the control device, which will be described later, refers to the suppressable current value determination table 300 and determines a current value that can be suppressed while the electric device 2a or the like is operating (operating). Here, for example, the case where the electric device 2a and the like are air conditioners will be described as an example.
It should be noted that by including information such as the operation state execution time in the operation state information, it is possible to execute detailed determination processing of a suppressable current value.

In the illustrated example, immediately after the start of the cooling function execution, it is necessary to quickly lower the temperature of the room where the air conditioner is installed, and the current consumption cannot be suppressed. 0 A is set as the suppressible current corresponding to. Further, when the operation state is “fan”, the current consumption value is 1 A, and the current consumption cannot be further suppressed, so that 0 A is set as the corresponding current that can be suppressed.
On the other hand, if the operating state is “High cooling”, it can be assumed that even if the current consumption is reduced and the operating state is changed to “Cooling”, the user's comfort will not be significantly reduced. The current that can be suppressed is set to 4A (consumption current value 10A-consumption current value 6A during cooling). Although the current value has been exemplified as the value that can be suppressed so far, the reduction ratio from the maximum current consumption may be set instead.
The controllable current value determination table 300 is recorded in the memory 21 and can be changed as necessary.

Returning to the description of FIG.
Reference numeral 17 in the figure denotes an operation state table creation unit that generates an operation state table 200 (see FIG. 3) at various timings such as when an operation table transmission instruction is received and stores it in the memory 21.

  Receiving the operation table transmission instruction, the control device 1a determines the operation state of the electric device 2a connected to the control device 1a. Then, the operation state table creation unit 17 determines a current value that can be suppressed according to the determined operation state, based on the suppressable current value determination table 300 described with reference to FIG. Then, the operation state table creation unit 17 sets the determined current value in the suppressable current value column 202 (see FIG. 3) of the operation state table 200.

  Specifically, when the determined operation state is “cooling function execution start” or “fan” described with reference to FIG. 4, the operation state table creation unit 17 determines the current value that can be suppressed as 0A. Further, in the case of “cooling strong”, the operation state table creation unit 17 determines that the current value that can be suppressed is 4A. Then, the determined current value is set in the suppressable current value column 202 of the operation state table 200.

  As described above, when the control device 1x transmits a signal instructing the control device 1a to transmit the operation state table, the control unit 10 of the control device 1a that has received the signal stores the memory 21. Is transmitted to the control device 1x.

  For example, when the ID “AirConditioner_001” of the air conditioner in the ID column 201 is set and “4A” is set in the suppressible current value column 202, the air conditioner suppresses the current value of 4A from the current current. (Reduction) shows that it can operate without any problem.

  Reference numeral 14 in FIG. 2 denotes a suppression device selection unit, which includes the current value necessary for the electric device 2x stored in the memory 21 to start a new operation and the acquired operation state table. Accordingly, an electrical device that suppresses the current is selected and the suppression current value is determined. The suppression current value is calculated by a suppression current value calculation unit described later.

In the figure, reference numeral 15 denotes a suppression current value calculation unit, which calculates a current value that can be suppressed by the electrical device corresponding to the operating state of the electrical device selected by the suppression device selection unit 14.
Details of operations of the suppression device selection unit 14 and the suppression current value calculation unit 15 will be described later.

  Reference numeral 16 in the figure denotes a current suppression instruction unit, which is a current corresponding to the current value calculated by the suppression current value calculation unit 15 with respect to the control device of the electrical device that is the current suppression target selected by the suppression device selection unit 14. Instruct to reduce consumption. Specifically, the current suppression instruction data 400 illustrated in FIG. 5 is generated and transmitted to the control device connected to the electrical device selected by the suppression device selection unit 14.

401 of FIG. 5 is an ID column, and ID of the electric equipment which the suppression equipment selection part 14 selected is set.
In the figure, reference numeral 402 denotes a suppression current value column, in which a current value to be suppressed by the electric device set in the ID column 401 is set.

The current suppression instruction unit 16 transmits the generated current suppression instruction data to the control device connected to the electrical device indicated by the ID set in the ID column 401 of the data.
The control device that has received the current suppression instruction data uses a current control device (inverter device) (not shown) that controls the supply current to the connected electrical device, and supplies the current so that the supply current does not exceed the limit value according to the instruction. Perform limit control. Detailed operation will be described later.

Here, the electric device selection process and the controllable current value calculation process when the electric device 2x starts a new operation will be described in detail using specific values as examples.
First, it is assumed that the current value required for the operation is 10A.
The current information acquisition unit 11 acquires the total current value of the other electric devices (2a to 2d) from the ammeter 4, and acquires the rated current value of the breaker from the memory 21. The total current value is 35 A, and the rated current value of the breaker is 40 A.
In this case, in order for the electric equipment 2x to start a new operation, the current of 5 A is insufficient (40-35-10 = -5).

Therefore, the other device operation state acquisition unit 13 acquires an operation state table from the control devices (1a to 1d) of the electric devices (2a to 2d) other than the electric device 2x that newly starts operation, and controls each electric device. Get the possible current value.
Assume that the suppressible current value of the electrical device 2a is 3A, the suppressable current value of the electrical device 2b is 3A, the suppressable current value of the electrical device 2c is 1A, and the suppressable current value of the electrical device 2d is 0A.

The suppression device selection unit 14 selects another electrical device that suppresses the current so as to compensate for the insufficient current value of 5A.
Specifically, the sum of the suppressible current values of the electrical equipment to be selected may be set to exceed the insufficient current value.
Since the sum of the suppressible current values of the electric devices 2a and 2b is 6A, the electric devices 2a and 2b are selected.
Then, the suppression current value calculation unit 15 calculates a current value that can be suppressed in the selected electrical device. Here, since the current value to be suppressed only needs to exceed 5A, it is assumed that the current consumption values of the electric device 2a and the electric device 2b are each suppressed by 3A with a margin (3A is calculated as the suppression current value).

  The current suppression instruction unit 16 generates the current suppression instruction data 400 in which the ID (“AirConditioner_001”, etc.) of the selected electrical device and the current value (3A) to be suppressed by the selected electrical device are set as shown in FIG. And it transmits to the control apparatus connected to the said electric equipment.

  Although the above example is a basic embodiment, as another method, a priority column may be provided in the operation state table, and an electric device that is a current value suppression target may be selected according to the priority. Similarly, a column in which a time during which current can be suppressed can be set is provided in the operation state table, and the current may be suppressed only for the time described in the column. If comprised in this way, the fine control according to the condition of an apparatus will be attained. Moreover, ID of the electric equipment which suppressed electric current last time may be recorded, and it may be made not to suppress the electric current of the said electric equipment. If comprised in this way, it will become possible to avoid that suppression control concentrates on a specific apparatus.

(Current suppression processing in the control device that received the current suppression instruction)
Next, a functional block group related to a current suppression process executed by a control device connected to an electrical device that has received a current suppression instruction will be described.

Reference numeral 18 in FIG. 2 denotes a current suppression instruction data receiving unit that receives the current suppression instruction data (see FIG. 5) transmitted by the control device of another electrical device via the network I / F 22.
In the figure, 19 is a current suppression processing control unit, which analyzes the current suppression instruction data received by the current suppression instruction data receiving unit 18 and sets the current value set in the suppression current value column 402 of the current suppression instruction data 400. And control for suppressing current consumption.
When the current value set in the suppression current value column 402 of the current suppression instruction data 400 for the electrical device (2a, 2b) is 3A as in the above specific example, the operating current value (consumption current value) before control For example, in the case of 6A, the current value 3A, in which 3A is suppressed, is set as a current limit value in a current control device (inverter control device, etc.) (not shown) so that the operating current does not exceed the limit value. Do.

By the way, the current suppression process control part 19 is provided with the flag which shows the execution state of the current limitation control which is not illustrated. When the flag is set, it indicates that the current is being limited, and when the flag is released, it indicates that the current is not being limited.
The current suppression processing control unit 19 sets the flag and monitors the current limit control state of the current control device when performing control for suppressing current consumption. When the operating current of the electrical device decreases and becomes equal to or less than the current limit value (when the current value supplied via the breaker decreases by more than the suppression current value), the setting of the flag is canceled and the current limit is set. End (release) control.
For example, when the electrical equipment is an air conditioner and the room temperature is lower than the set temperature and the operation is “weak” during execution of the cooling function, the operating current decreases and becomes lower than the current limit value. Ends the current limiting control and cancels the setting of the flag.
During the setting of the flag, it is also indicated that the suppressable current value is zero.

  Furthermore, when the operation of the electric device 2x that has started a new operation is completed or the power supply of the other electric device 2 or the like that was operating is turned off, the total current consumption value is reduced, and current limit control is performed. When it is no longer necessary to execute, the current limit control is terminated and the setting of the flag is cancelled.

Next, a processing flow executed by the control device 1x of the electric device 2x when the electric device 2x starts a new operation will be described with reference to the flowchart of FIG.
When the user operates the electric device 2x to start a new operation (step S1), the control unit 10 of the control device 1x connected to the electric device 2x detects the new operation to be started (step S2). ).
When the control unit 10 detects a new operation, the current information acquisition unit 11 acquires the total current value of the other electric devices (2a to 2d) from the ammeter 4 (step S3), and further from the memory 21 to the breaker rating. Get the current value.

Next, when the electric device 2x starts a new operation, the determination unit 12 determines whether or not the breaker operates, that is, the total current value + the current value necessary for starting the new operation ≧ the rated current value. It is determined whether or not it is established (step S4).
When it is determined that the breaker does not operate (step S4 / NO), the electric device 2x starts a new operation (step S9) and ends the processing flow.
On the other hand, when it is determined that the breaker operates (step S4 / YES), the following current suppression process is performed.
First, the other device operation state acquisition unit 13 of the control device 1x connected to the electric device 2x acquires the operation state table of the other electric device from the control device connected to the other electric device ( Step S5).
Although not shown in the drawing, the acquisition process is performed by the control device 1x transmitting an operation table transmission instruction to another control device, and the other control device receiving the instruction generates and controls an operation state table (see FIG. 3). This is a process of returning to the device 1x.

Next, the suppression device selection unit 14 is configured to suppress the current based on the current value necessary for the electrical device 2x stored in the memory 21 to start a new operation and the acquired operation state. A device is selected (step S6).
Further, the suppression current value calculation unit 15 calculates a current value that can be suppressed in the selected electrical device (step S7).

  And the electric current suppression instruction | indication part 16 is equivalent to the electric current value which the suppression electric current value calculation part 15 calculated with respect to the control apparatus connected to the electric equipment used as the electric current value suppression object which the suppression apparatus selection part 14 selected. An instruction is given to suppress the current (step S8).

After execution of step S8, the control unit 10 returns to step S3 and step S4 and performs determination (re-determination).
Here, if it is determined that the breaker does not operate, the process flow is terminated through step 9, but if it is determined that the breaker still operates, the current suppression process is executed again.

By the way, the following suppression process is performed in the control device 1a connected to the electric device 2a that has received the current suppression instruction by the process of step 8. This processing flow will be described with reference to the flowchart of FIG.
The current suppression instruction data receiving unit 18 of the control device 1a connected to the electric device 2a receives an instruction from the control device 1x to suppress the current of the electric device 2a (step S11). Specifically, the current suppression instruction data (see FIG. 5) transmitted by the control device 1x is received via the network I / F 22.
The current suppression processing control unit 19 analyzes the current suppression instruction data received by the current suppression instruction data receiving unit 18 (step S12), and determines a current limit value.

  Further, the current suppression processing control unit 19 sets the determined current limit value in the current control device (step S13), and sets a flag indicating the execution state of the current limit control (step S14).

Thereafter, the current suppression process control unit 19 starts the following monitoring process.
The current limit control state is monitored (step S15). For example, when the operating current of the electric device decreases and becomes equal to or less than the current limit value, it is not necessary to perform the current limit control (step S16 / YES). ), The current limit control process is terminated.
On the other hand, when it is necessary to perform current limit control (step S16 / NO), monitoring of the current limit control state is continued (step S15).
With the flow as described above, the supply current control device of the present invention can reliably avoid the operation of the breaker when the electric device performs a new operation.

<Example 2>
In the above example, the case where the current to be suppressed is constant as the current suppression operation is described. However, in Example 2, as another example of the current suppression operation, the current that switches the electrical device that is the current suppression target at regular time intervals. The suppression operation will be described with reference to FIG.
In this example, the electric device 2a can periodically switch between a normal operation and a current limiting operation, that is, can operate with a current consumption value such as L1 in the drawing. In addition, the specific numerical value in a figure is an example for description, and a numerical value is not limited as embodiment.
Similarly, the electric device 2b can operate with a current consumption value such as L2 in the figure.

  As an example, the current consumption of the electric device 2a and the electric device 2b in operation is 10A each, and the current consumption of the electric device 2a and the electric device 2b can be reduced by 5A each when the total current consumption must be suppressed by 5A. The case will be described.

As shown in FIG. 9, switching between the current value (10A) of the normal operation of the electric device 2a−the current value (5A) of the current limiting operation and the current of the current limiting operation of the electric device 2b corresponding to the switching. If the current consumption value of each electrical device is controlled so that switching between the value (5A) and the current value (10A) of the normal operation is performed simultaneously, the total current consumption can be suppressed by 5A.
As is clear from FIGS. 8 and 9, the duration of normal operation and the duration of current limiting operation of the electric devices 2a and 2b are substantially the same.
By executing the current limiting operation as described above, the current consumption is not limited only by the specific electric device 2a in order to suppress the total current consumption, and the convenience is not easily lost.

The suppression current value calculation unit 15 of the control device 1 performs the calculation processing of the current value of the normal operation of the electric device and the current value of the current limiting operation of the electric device as described above.
More specifically, first, the sum of the current consumption values (20A in the above example) of each electrical device selected by the suppression device selection unit 14 is calculated, and when the calculated value and the electrical device newly start. The difference from the insufficient current value (5A) is calculated (15A).
Furthermore, the sum of the current value of the normal operation of the electrical device and the current value of the current limiting operation of the electrical device is the sum of the current consumption values of the electrical devices selected by the suppression device selection unit 14 (20A in the above example). And the current value of the normal operation of the electric device and the current limit of the electric device such that the difference (15A) is less than the current value (5A) that is insufficient when the electric device is newly started. Get the current value of the operation. In the above example, since the current value of the difference is 15 A, the current value of the normal operation of the electrical equipment is 10 A, and the current value of the current limiting operation is 5 A.

FIG. 10 shows an operation state table 210 corresponding to the switching operation created by the operation state table creation unit 17.
211 in the figure is an ID column. Reference numeral 212 denotes an operation type column for setting a type of current suppression processing to be executed in the electric device identified by the ID in the ID column, and “switching operation” is set here. Reference numeral 213 denotes an intermittent waveform type column indicating the type of waveform (intermittent waveform) indicating the current consumption value of the electrical device when the normal operation and the current limiting operation as shown in FIG. 8 are periodically switched.
In the intermittent waveform type column 213, information indicating the type of intermittent waveform such as a rectangular wave, a triangular wave, and a sine wave, and information such as a controllable current value, an execution time of a normal operation, and a current limiting operation are set.

  As described above, the operation state table 210 created by the operation state table creation unit 17 is transmitted to the control device connected to the other electrical device in response to a request from the control device connected to the other electrical device. The

FIG. 11 shows the current suppression instruction data 410 corresponding to the switching operation created by the current suppression instruction unit 16.
In the figure, reference numeral 411 denotes an ID column, and 412 denotes an operation type column. Reference numeral 413 denotes an intermittent waveform type field, and in principle, the intermittent waveform type set in the intermittent waveform type field 213 of FIG. 10 is set.
Further, in the intermittent waveform type column 413, in addition to the execution time of the normal operation and the current limiting operation, the normal operation of the electric equipment connected to the control device 1 calculated by the suppression current value calculation unit 15 of the control device 1 And the current value of the current limiting operation of the electric device are set.

  If the current value of the current limiting operation is equal to or less than the suppressible current value set in the intermittent waveform type column 213 of the operation state table 210, the suppression current value calculation unit 15 appropriately determines as described in the first embodiment. Can be changed (calculated).

  Reference numeral 414 denotes a switching operation execution start timing column in which the switching operation execution start timing is set. Examples of the timing include the start time of the switching operation.

The current suppression processing control unit 19 of the electrical device that has received the current suppression instruction data 410 has been set in the intermittent waveform type column 413 when the start timing set in the switching operation execution start timing column 414 of the data 410 has been reached. Based on the intermittent waveform type, the current value of the normal operation, and the current value of the current limiting operation, current control (switching operation) for periodically switching between the normal operation and the current limiting operation is executed.
In order to execute the switching operation at the start timing, it is necessary to time-synchronize each electric device. Therefore, the control device connected to each electric device must include a time measuring unit that realizes the time synchronization.

<Others>
The control device may be provided for each current control device (inverter device), or may be provided for a plurality of current control devices.
In the embodiment, the control device for the electric device is configured separately for each electric device, but the electric device and the control device may be integrated.
In addition, a control server in which the control units of the control devices of the electric devices are collected may be used, and current control of the current control device to which the electric devices are connected may be executed by the control server. In addition, you may provide the control server which put together the function of the specific function, for example, the determination part 12, the suppression apparatus selection part 14, and the suppression electric current value calculation part 15 of the control part 10. FIG.
By doing so, the network configuration can be simplified. In particular, traffic in the network can be reduced by collectively managing the operation state table on the server.
The electric device may be provided with means for measuring the total current value of other electric devices and means for storing the rated current value of the breaker. By doing so, it is not necessary to provide the ammeter 4, and the system configuration can be simplified.
Information indicating the main function of the electric device may be included in the operation state table, and the current of the electric device that can execute the main function may be collectively reduced. For example, when the air conditioning function is set as information indicating the main function of the electrical equipment, the current of the electrical equipment (air conditioning equipment) having the air conditioning function as the main function is collectively reduced.
The operation state table and the current suppression instruction data may be text data such as XML format or binary data. Each data may be compressed and encrypted.
In addition, for an electrical device group constituting an extremely small power system in which a breaker is not installed (for example, a power system including electrical devices connected to the power strip when the power strip is used as a reference for power distribution) Also, the current control of the present invention can be performed.

It is the figure which showed the electric equipment of a consumer. It is a block diagram for demonstrating the control apparatus concerning this invention. It is the figure which showed an example of the operation state table. It is the figure which showed an example of the table for suppression possible electric current value determination. It is the figure which showed an example of the current suppression instruction data. It is a flowchart for demonstrating the process performed with the control apparatus of the said electric equipment, when an electric equipment starts new operation | movement. It is a flowchart for demonstrating the process performed with the electric equipment which receives an electric current suppression instruction | indication. It is a figure for demonstrating the electric current suppression operation | movement which switches the electric equipment of electric current suppression object by a fixed time interval. It is another figure for demonstrating the electric current suppression operation | movement which switches the electric equipment of electric current suppression object by a fixed time interval. It is the figure which showed the other example of the operation state table. It is the figure which showed the other example of the current suppression instruction data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Control apparatus, 10 ... Control part, 11 ... Current information acquisition part, 12 ... Determination part, 13 ... Other apparatus operation state acquisition part, 14 ... Inhibition apparatus selection part, 15 ... Inhibition electric current value calculation part, 16 ... Current suppression Instructing unit, 17 ... operating state table creation unit, 18 ... current suppression instruction data receiving unit, 19 ... current suppression processing control unit, 21 ... memory, 22 ... network I / F, 2 ... electrical equipment, 3 ... breaker, 4 ... Ammeter, 200, 210... Operation state table, 300... Suppressable current value determination table, 400, 410.

Claims (6)

A control device for a power supply system that controls a supply current of a plurality of electrical devices that receive power supply via a breaker so as not to exceed a rated current value of the breaker,
When the electric device connected to the control device starts a new operation, a determination unit that determines whether or not the breaker operates,
An operation state acquisition unit for acquiring operation state information of other electrical devices connected to other control devices;
An electrical device that suppresses current consumption according to the acquired operating state information and a suppression device selection unit that determines a suppression current value;
A control device that instructs current limit control to prevent a supply current from exceeding a limit value according to the suppression current value to a current control device to which the selected electrical device is connected.   The control apparatus according to claim 1, wherein the operation state information includes current value information that can be suppressed corresponding to an operation state of the other electric device.   The said control apparatus is provided with the suppression current value calculation part which calculates the electric current value which can suppress the said electric equipment corresponding to the operation state of the electric equipment connected to the said current control apparatus. The control apparatus according to 1.   The control device monitors the current control device that has instructed the current limit control, and sets the current value that can be suppressed by the electric device connected to the current control device to zero during the execution of the current limit control. The control device according to claim 3.   The control device monitors the current limit control, monitors a current value supplied via a breaker, and cancels the current limit control when the current value decreases by more than the suppression current value. The control device according to claim 1.   The control device according to claim 1, wherein the control device is provided for each current control device.

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