WO2016009492A1

WO2016009492A1 - Power supply control device

Info

Publication number: WO2016009492A1
Application number: PCT/JP2014/068771
Authority: WO
Inventors: 伸行河野
Original assignee: 中国電力株式会社
Priority date: 2014-07-15
Filing date: 2014-07-15
Publication date: 2016-01-21
Also published as: JPWO2016009492A1; JP5813904B1

Abstract

According to the present invention, when the remaining power of a power supply device (3) reaches a preset threshold value during a power outage, a load having the highest priority and a load having the minimum power consumption are re-specified as loads to be connected from among the loads connected to the power supply device (3) and one load is selected according to the priority order from among the remaining loads that are not re-specified and connected to the power supply device (3). In this case, when the total power consumption of the selected load and the re-specified loads is less than or equal to an output suppression value, said selected load is re-specified as a load to be connected, wherein said output suppression value is set in accordance with the remaining power of the power supply device (3) and the preset target value of the total operation time of the power supply device (3). When the total power consumption is more than or equal to the output suppression value, said selected load is specified as a load to be interrupted. This makes it possible to adjust the power consumption of loads by controlling the connection of the loads to the power supply device (3), therefore enabling the total operation time of the power supply device (3) to reach a preset desired time.

Description

Power supply control device

The present invention relates to a power supply control device that controls supply of power from a power supply device to each load.

In recent years, in a consumer, when power supply from an electric power system is stopped due to a power failure or the like, a system for supplying power to a load by using a power supply device such as a storage battery or a power generation device of an electric vehicle is becoming widespread. .

In such a system, the power obtained from the power supply device is smaller than the power obtained from the power system. Therefore, before the power failure, sufficient power was obtained from the power system to operate all loads, but at the time of power failure, sufficient power was not obtained from the power supply to operate all loads. Sometimes.

Considering this point, a technique for limiting a load to be operated by power supplied from a power supply device in the event of a power failure has been proposed (for example, see Patent Document 1). In the power supply system described in Patent Document 1, a plurality of loads of a house are divided into a load group LA and a load group LB, and power is supplied only from the battery that is a power supply device to the load group LB at the time of a power failure. In addition, the power supply system sets priorities for a plurality of loads included in the load group LB, estimates the power reserve based on the remaining capacity of the battery and the estimated power consumption of each load, and the power reserve is small. Sometimes power is supplied only to high priority loads.

Further, in Patent Document 2, when the output of the generator unit is lower than the predicted power demand, the generator unit sequentially targets the power supply from the power load having the highest priority, and the total predicted power demand indicates the total of the above outputs. A control system for selecting a power load within a range not exceeding is described.

JP 2007-236023 A JP 2008-11612 A

By the way, while the load is operated by the power supplied from the power supply device during a power failure, the power consumption of the power supply device may be generated by reducing the power consumption of the load depending on the operating state of the load. In such a case, in order to use the power from the power supply device as effectively as possible or operate as many loads as possible, it is possible to add a load connected to the power supply device within the range of the remaining power. desirable.

However, simply connecting additional loads to the power supply device simply according to the priority order causes a problem that the load additionally connected to the power supply device as described below is limited more than necessary.

For example, assume that there are loads M1, M2, M3, and M4, and the priority order is set in this order. When a power failure occurs, the loads M1 and M2 are loads that can supply power within the range of the output capability of the power supply device by comparing the output capability of the power supply device and the power consumption of each of the loads M1 to M4. Assume that only M1 and M2 are connected to the power supply. In such a state, if the power consumption of the load M1 or M2 is reduced while the power failure continues and the power supply device has a surplus, if the load is simply added to the power supply device according to the priority order, The load to be additionally connected is the load M3.

However, when the power consumption of the load M3 exceeds the range of the remaining power of the power supply device, the load M3 is not connected. In this case, the load M4 having a lower priority than the load M3 is not connected. However, even when the power consumption of the load M3 exceeds the range of the remaining power of the power supply device, it is conceivable that the power consumption of the load M4 is within the range of the remaining power of the power supply device. In such a case, the load M4 is additionally connected to the power supply device from the viewpoint of promoting effective use of the power from the power supply device or operating as many loads as possible to improve the convenience for the user. Is desirable.

Also, there may be loads with priorities set and loads without priorities set. In such a case, even if the power consumption of the power supply decreases due to a reduction in the power consumption of the power supply during a power outage, a load with no priority set is simply established by simply connecting the load to the power supply according to the priority order. Is never connected to the power supply. However, there may be a case where there is a load whose power consumption is within the range of the remaining power of the power supply device among the loads for which priority is not set. In such a case, it is desirable to additionally connect the load to the power supply device from the above viewpoint.

Contrary to this, when the power consumption of the load increases during the power outage and exceeds the output capability of the power supply device, the load is cut off from the power supply device in descending order of priority. At this time, as a result of interrupting the load, there is a case where the power supply device has a surplus power. In this case, when there is an unconnected load whose power consumption is within the range of the remaining capacity of the power device, it is desirable to additionally connect such a load.

Furthermore, when the load is operated using the power supply device to the maximum within the range of its output capability, and when only the minimum required load is operated within the range of the output capability. Then, compared to the latter, the former consumes much more power in the power supply device. And if power consumption becomes early, the operation time which can be continued in a power supply device will also become short. Therefore, there has been a demand to continue the operation of the power supply apparatus for as long as possible while operating a desired load.

Therefore, the present inventor can operate a desired load while using the increase / decrease of the operation time of the power supply device in inverse proportion to the power consumption that fluctuates according to the selection of the load to be operated. We focused on enabling the operation of the power supply device to continue for as long as possible.

Therefore, the present invention has been made in view of the above-described problems. In the power supply control device, when the remaining power of the power supply device reaches a preset threshold value, the connection of the load to the power supply device is controlled. Thus, the main purpose is to allow the power consumption to be adjusted and to continue the operation of the power supply device so as to achieve a desired target time set in advance.

In order to solve the above problem, the first power supply control device of the present invention provides:
A power supply control device that is interposed between a power supply device and a plurality of loads, and controls power supply from the power supply device to each of the loads when power supply from the power system to each of the loads is stopped due to a power failure. There,
A main control unit that controls the entire system,
A circuit for connecting the loads in parallel to the power supply device;
A plurality of switches corresponding to each of the loads in the circuit, and a switch for switching an energized state between the power supply device and each of the loads to connection or disconnection,
A priority setting unit for setting a priority for each of the loads;
One load is selected from each of the loads according to the priority, and the total power consumption of the selected load and the load specified as the connection target is set according to the output capability of the power supply device When the output is not more than the output upper limit, the selected load is specified as a connection target, and the total power consumption of the selected load and the load specified as the connection target is not less than the output upper limit value A load specifying unit that repeatedly performs load specifying processing such as not specifying the selected load as a connection target for all of the plurality of loads; and
Switching control of the switch corresponding to the load specified as a connection target by the load specifying unit, and connecting the load specified as the connection target to the power supply device; and
An operation time measuring unit that measures the operation time of the power supply device, and
The main control unit
The output capability of the power supply;
The total power consumption of the loads connected to the power supply,
When the remaining amount of power of the power supply device calculated according to the measurement result of the operation time measuring unit reaches a preset threshold value,
Among the loads connected to the power supply device, the load specifying unit re-specifies the load with the highest priority and the load with the lowest power consumption as connection targets, and is not specified again. One load is selected from the remaining loads connected to the power supply device according to the priority order, and the total power consumption of the selected load and the re-specified load is determined by the power supply device. The remaining amount of power of the power supply device calculated according to the output capacity, the total power consumption of the load connected to the power supply device, and the measurement result of the operation time measurement unit, and the preset power supply If it is less than or equal to the output suppression value that is reset according to the target value of the total operating time of the device, the selected load is identified again as a connection target, and the selected load and the identified again If the total power consumption with the selected load is not less than or equal to the output suppression value, load re-specification processing such as specifying the selected load as a shut-off target is performed for all loads connected to the power supply device Done,
The switching control unit switches and controls the switch corresponding to the load specified as the shut-off target by the load specifying unit, shuts off the load specified as the shut-off target from the power supply device, and The power consumption of the connected load is adjusted.

The second power supply control device of the present invention is the above-described first power supply control device of the present invention.
A measurement unit for measuring the power consumption of each of the loads;
A storage unit that stores a measurement value of power consumption of each of the loads measured by the measurement unit;
The load specifying unit calculates the total power consumption using a measured value of power consumption of each load measured by the measurement unit and stored in the storage unit.

The third power supply control device of the present invention is interposed between the power supply device and the plurality of loads, and when power supply from the power system to each of the loads is stopped due to a power failure, A power supply control device for controlling power supply to the load,
A main control unit that controls the entire system,
A circuit for connecting the loads in parallel to the power supply device;
A plurality of switches corresponding to each of the loads in the circuit, and a switch for switching an energized state between the power supply device and each of the loads to connection or disconnection,
A priority setting unit configured to set a priority only for the priority load, a part of each of the loads as a priority load, a remaining part as a non-priority load,
One priority load is selected according to the priority, and the total power consumption of the selected priority load and the priority load specified as the connection target is the output upper limit set according to the output capability of the power supply device If it is less than or equal to the value, the selected priority load is identified as the connection target, and the total power consumption of the selected priority load and the priority load identified as the connection target is not less than or equal to the output upper limit value In this case, a priority load specifying unit that repeatedly performs a priority load specifying process for not specifying the selected priority load as a connection target for all priority loads, and
After the priority load specifying process is performed for all priority loads by the priority load specifying unit, one non-priority load is selected in order of power consumption, and the selected non-priority load is specified as a connection target. A non-priority load specifying unit that repeatedly performs the non-priority load specifying process as long as the total power consumption of the selected non-priority load and the load specified as the connection target is equal to or less than the output upper limit value;
A switching control unit for controlling the switching of the switch corresponding to the load specified as the connection target by the priority load specifying unit and the non-priority load specifying unit, and connecting the load specified as the connection target to the power supply device; ,
An operation time measuring unit that measures the operation time of the power supply device, and
The main control unit
The output capability of the power supply;
The total power consumption of the loads connected to the power supply,
When the remaining amount of power of the power supply device calculated according to the measurement result of the operation time measuring unit reaches a preset threshold value,
Among the loads connected to the power supply device, the priority load specifying unit and the non-priority load specifying unit set the priority load having the highest priority and the non-priority load having the smallest power consumption as connection targets. At least one of the one priority load and the non-priority load with the largest power consumption among the remaining loads connected to the power supply apparatus that has not been specified again is specified according to the priority. And the total power consumption of the selected load and the load specified again is re-established according to the remaining power level of the power supply device and the preset target value of the total operation time of the power supply device. If it is less than or equal to the set output suppression value, the selected load is specified again as a connection target, and the power consumption of the selected load and the specified load again is determined. If total is not equal to or less than the output inhibition values for load re-identification process such identifying the selected load as a blocking object for all loads connected to the power supply,
The switching control unit switches and controls the switch corresponding to the load specified as the shut-off target by the load specifying unit, shuts off the load specified as the shut-off target from the power supply device, and The power consumption of the connected load is adjusted.

The fourth power supply control device of the present invention is the above-described third power supply control device of the present invention.
A measuring unit for measuring the power consumption of each load;
A storage unit for storing a measured value of power consumption of each load measured by the measurement unit;
The priority load specifying unit and the non-priority load specifying unit calculate the total power consumption using the measured power consumption value of each load measured by the measurement unit and stored in the storage unit. Features.

According to the present invention, when the remaining power of the power supply device reaches a preset threshold value, the power consumption can be adjusted by controlling the connection of the load to the power supply device. Operation of the power supply can be continued to achieve.

It is explanatory drawing which shows roughly the electric power supply control apparatus which concerns on one Embodiment of this invention. In the power supply control apparatus of FIG. 1, it is explanatory drawing which shows an example of the load management table at the time of a power failure occurrence. It is a flowchart which shows the connection load specific process in the electric power supply control apparatus of FIG. It is a flowchart which shows the connection load specific process following FIG. In the power supply control apparatus of FIG. 1, it is explanatory drawing which shows an example of the load management table when the electric power residual amount in the power supply device in the time of a power failure reaches a threshold value. It is a flowchart which shows the connection load re-specification process in the electric power supply control apparatus of FIG.

Hereinafter, a power supply control apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(Power supply control device)
In FIG. 1, the power supply control device 1 according to the present embodiment is a power supply device as a power supply device when power supply from the power system 2 to a plurality of (for example, eight) loads L1 to L8 is stopped due to a power failure. 3 is a device that controls the supply of electric power from load 3 to loads L1 to L8. In the present embodiment, the power supply control device 1 is provided in a consumer and controls power supply to the loads L1 to L8 in the consumer.

The power supply control device 1 includes a distribution board 4 including a circuit for connecting the loads L1 to L8 in parallel to the power supply device 3, and a personal computer 5 (hereinafter simply referred to as “PC5” as a main control unit). And a switching control device 6 as a switching control unit.

The distribution system 4 is connected to the power system 2 via an external circuit breaker 7 or the like. The power distribution device 3 is connected to the distribution board 4. The power supply device 3 is a device that takes out the electric power stored in the storage battery 9 of the electric vehicle 8 and supplies it to the distribution board 4 side, for example.

In addition, a plurality of (in this case, eight) loads L1 to L8 are connected to the distribution board 4. The loads L1 to L8 include, for example, electric devices such as lighting, fire alarms, refrigerators, air conditioners, and television devices.

In the distribution board 4, an electric circuit 11 for selectively supplying the power from the power system 2 and the power from the power supply device 3 to the loads L1 to L8 is formed. The electric circuit 11 includes a main line 12, and an external circuit breaker 7 connected to the power system 2 and the power supply device 3 are connected to the main line 12 in parallel with each other. A branch circuit unit 13 is connected to the trunk line 12.

The branch circuit unit 13 includes a plurality of lines for connecting a plurality of loads L1 to L8 to the main line 12, and the loads L1 to L8 are respectively connected in parallel to the main line 12 via these lines. ing.

Further, in the branch circuit unit 13, a load as a switch that switches the energized state between the load L <b> 1 and the trunk line 12 to connection or disconnection in the middle of the line connecting the load L <b> 1 and the trunk line 12. A switch 21 is connected. The load switch 21 is, for example, a circuit breaker. Further, a current transformer (CT) 31 for measuring a current flowing into the load L1 through the line is connected to the line connecting the load L1 and the main line 12. Similarly, load switches 22 to 28 and current transformers 32 to 38 are also connected to lines connecting the loads L2 to L8 and the main line 12, respectively. The current transformers 31 to 38 are specific examples of measuring units.

In the distribution board 4, a power breaker 14 that switches between connection and disconnection between the power system 2 and the trunk line 12 is provided. The power breaker 14 is, for example, a wiring breaker with UVT (undervoltage trip device). The power breaker 14 is closed during normal operation (when the power system is in operation) and connects between the power system 2 and the trunk line 12, but when the supply of power from the power system 2 is stopped due to a power failure or the like. This is detected and automatically opened, and the power system 2 and the trunk line 12 are disconnected. Further, a current transformer 15 for measuring a current flowing from the power system 2 to the trunk line 12 is connected to the distribution board 4.

Further, in the distribution board 4, a closing switch 16 is provided as a switch for switching the energized state between the power supply device 3 and the trunk line 12 to connection or disconnection. The closing switch 16 is configured by, for example, a manually switchable switch. The closing switch 16 is normally open, and disconnects between the power supply device 3 and the trunk line 12. The user can manually close the input switch 16 to connect the power supply device 3 and the trunk line 12.

The switching control device 6 is a device that controls the distribution board 4 together with the PC 5, and an interface circuit, a control circuit, etc. (not shown) are provided therein. Connected to the switching control device 6 are a PC 5, a current transformer 15, a power circuit breaker 14, a closing switch 16, current transformers 31 to 38, and load switches 21 to 28. The switching control device 6 receives the current values measured by the current transformer 15 and the current transformers 31 to 38 from the current transformer 15 and the current transformers 31 to 38, and outputs them to the PC 5. Further, the switching control device 6 receives the trip signal output from the power breaker 14 and outputs a notification signal corresponding to the received trip signal to the PC 5. Further, the switching control device 6 detects on / off of the closing switch 16 and outputs a detection signal corresponding to the detection result to the PC 5. Further, the switching control device 6 receives a command signal output from the PC 5, and outputs a control signal corresponding to the received command signal to the load switch specified by the command signal among the load switches 21 to 28. . The load switch opens and closes according to the control signal. The switching control device 6 is a specific example of the switching control unit together with the PC 5.

The PC 5 includes a CPU (Central Processing Unit) 41 and a storage unit 42. The PC 5 also includes an operation input unit 43 including a keyboard and a pointing device, and an information display unit 44 including a display device. Furthermore, the PC 5 has an interface (not shown) for transmitting / receiving information to / from the switching control device 6. The CPU 41 follows a computer program installed in the PC 5 in advance, as will be described later, (a) priority order setting processing, (b) power consumption calculation processing, (c) connection load identification processing, (d) operation time measurement processing, And (e) A connection load respecifying process is performed. The storage unit 42 is a storage device such as a hard disk drive device or a flash memory. The storage unit 42 stores a load management table (see FIG. 2). The PC 5 is a specific example of a priority order setting unit, a power detection unit, an operation time measurement unit, a load specification unit, a priority load specification unit, and a non-priority load specification unit.

(Load management table)
The upper part of FIG. 2 shows an example of a load management table. In FIG. 2, a load management table T1 is a table showing the management state of each of the loads L1 to L8. In the load management table T1, the “load number” is information for identifying each of the loads L1 to L8. “Priority / non-priority” is information indicating whether each of the loads L1 to L8 is a load with a priority set or a load with no priority set. “Priority” is information indicating the priority of each load for which a priority is set. “Power consumption” is a power consumption value of each of the loads L1 to L8. “Connection / cutoff” is information indicating whether each of the loads L1 to L8 is connected to the main line 12 or is cut off. The “selection flag” is information indicating whether or not each of the loads L1 to L8 has been selected in the connection load specifying process and the connection load respecifying process described later. The load management tables T2 to T4 shown in the lower part of FIG. 2, FIG. 5 and FIG. 7 are the same as the load management table T1 in the upper part of FIG. 2, but are load management tables at different points in time. The values recorded in the management table are different.

(Priority setting process)
The power supply control device 1 performs priority order setting processing under the control of the CPU 41 of the PC 5. The priority order setting process is a process for setting priority, non-priority setting, and priority order for each of the loads L1 to L8 in accordance with a user input.

As will be described later, in the connection load specifying process and the connection load respecifying process, the load is connected to the trunk line 12 so that the power consumption of the load is equal to or less than the output upper limit value set according to the output capability of the power supply device 3. Or a load to be cut off from the trunk line 12 is specified. At that time, among the loads L1 to L8, a load with a priority set (hereinafter referred to as “priority load”) and a load with no priority set (hereinafter referred to as “non-priority load”). And the reference for specifying the load to be connected to the main line 12 or cut off from the main line 12 is different. Further, in the load specifying process, the priority load to be connected to the main line 12 or to be cut off from the main line 12 is specified in consideration of the priority set for each priority load. Therefore, the power supply control device 1 performs priority order setting processing in preparation for the execution of the connection load specifying process and the connection load respecifying process, and prioritizes and non-prioritizes each of the loads L1 to L8 according to a user input. Setting and setting of priority for priority load.

In the priority order setting process, specifically, the CPU 41 of the PC 5 displays a setting input screen for performing priority and non-priority setting inputs and priority order setting inputs for the priority loads for the loads L1 to L8. Is displayed on the information display unit 44. The user can operate the operation input unit 43 of the PC 5 while looking at the setting input screen, and can input priority setting, non-priority setting input, and priority setting input regarding the priority loads for each of the loads L1 to L8. . The priority and non-priority settings for the loads L1 to L8 and the priority order settings for the priority loads input by the user are stored in the storage unit 42 as part of the load management table (see FIG. 2). .

The user can set priorities for all of the loads L1 to L8, or select some loads from the loads L1 to L8, set priorities for the selected loads, and prioritize the remaining loads. It is possible to set no ranking. It is also possible not to set the priority order for all of the loads L1 to L8. Further, the user can change the priority setting for the loads L1 to L8, the non-priority setting, and the priority setting for the priority load at any time.

(Power consumption calculation process)
Further, the power supply control device 1 performs power consumption calculation processing under the control of the CPU 41 of the PC 5. The power consumption calculation process is a process of calculating the power consumption of each of the loads L1 to L8 and storing the calculated power consumption in the storage unit 42.

In the connection load specifying process and the connection load respecifying process described later, the load to be connected to or cut off from the main line 12 is specified in consideration of the power consumption of each of the loads L1 to L8. Therefore, the power supply control device 1 performs power consumption calculation processing and calculates the power consumption of each of the loads L1 to L8. The power consumption calculation process is also performed during a power failure.

The power consumption calculation process is performed as follows, for example. That is, the current transformers 31 to 38 always measure the current flowing into the loads L1 to L8 for each load, and always output the measured current value to the switching control device 6. Subsequently, the switching control device 6 outputs the current value output from the current transformers 31 to 38 to the PC 5 for each load. Subsequently, the PC 5 receives these current values, and the CPU 41 of the PC 5 calculates the power consumption of the loads L1 to L8 for each load using the received current values. The CPU 41 continuously calculates power consumption for each of the loads L1 to L8, and stores the calculated power consumption value in a temporary storage area of the storage unit 42 at a predetermined time interval (for example, every 1 second).

The power consumption values of the loads L1 to L8 are accumulated in the temporary storage area of the storage unit 42. The CPU 41 refers to the power consumption value of the load L1 accumulated in the temporary storage area of the storage unit 42 every predetermined time, for example, every 10 minutes, and the load L1 accumulated for 10 minutes retroactively from that time point. The maximum power consumption value among the power consumption values is specified, and the specified power consumption value is stored in another area of the storage unit 42 as a part of the load management table (see FIG. 2). Immediately thereafter, the CPU 41 erases all the power consumption values of the load L1 accumulated in the temporary storage area of the storage unit 42. The CPU 41 performs the same process for the power consumption values of the loads L2 to L8 accumulated in the temporary storage area of the storage unit 42. As a result, the maximum power consumption value for the last 10 minutes of the loads L1 to L8 is recorded for each load in the load management table shown in FIG. When the calculation of the power consumption of the load is performed in the connection load specifying process and the connection load respecifying process described later, the latest power consumption value recorded in the load management table is used.

(Connection load identification processing)
Further, the power supply control device 1 performs a connection load specifying process under the control of the CPU 41 of the PC 5. The connected load specifying process is a process of specifying a load to which power is to be supplied from the power supply device 3 when a power failure occurs. Specifically, the connection load specifying process specifies a load to be connected to the main line 12 when the power system 2 is disconnected from the main line 12 due to a power failure and the power supply device 3 is connected to the main line 12. It is processing to do.

First, the basic contents of the connection load specifying process will be described using the first example. The upper part of FIG. 2 shows the load management table at the start of the connection load specifying process in the first example, and the lower part of FIG. 2 shows the load management table at the end of the connection load specifying process in the first example.

In the first example, the priorities are set for the loads L2, L3, and L7 among the loads L1 to L8 by the setting input performed in advance by the user, and the priorities are set for the loads L1, L4 to L6, and L8. Is not set. Therefore, the loads L2, L3, and L7 are priority loads, and the loads L1, L4 to L6, and L8 are non-priority loads. In addition, priority orders are set for the priority loads L2, L3, and L7 in this order. Furthermore, the power consumption of the loads L1 to L8 is 800W, 200W, 300W, 500W, 400W, 300W, 160W, and 40W in order.

In such a state, when the connection load specifying process is started when a power failure occurs, all of the loads L1 to L8 are first cut off from the trunk line 12. The upper load management table T1 in FIG. 2 shows the state of the load management table at this point. The selection flag will be described later.

Subsequently, one priority load is selected according to the priority order, and the total power consumption of the selected priority load and the load specified as the connection target is set in advance according to the output capability of the power supply device 3. If the output upper limit value is less than or equal to the output upper limit value, the selected priority load is identified as a connection target, and the priority load is immediately connected to the trunk line 12. On the other hand, when the total power consumption of the selected priority load and the load specified as the connection target is not less than or equal to the output upper limit value, the selected priority load is not specified as the connection target. In this case, the priority load is maintained in a state where it is cut off from the trunk line 12. Such processing is sequentially repeated for all priority loads according to the priority order. In the present embodiment, the output rating of the power supply device 3 is 1000 W, and the output upper limit value is 1000 W, which is an appropriate value equal to or lower than the output rating. Note that, by setting the output upper limit value to a value lower than the output rating of the power supply device 3, even if the load power consumption increases while the load is operating with the power from the power supply device 3, It is also possible to prevent the total power consumption of the connected loads from immediately exceeding the output rating of the power supply device 3.

Next, one non-priority load is selected in ascending order of power consumption, and the process of identifying the selected non-priority load as a connection target includes the selected non-priority load and the load identified as the connection target. As long as the total power consumption is less than or equal to the above output upper limit value, the process is repeated. If all non-priority loads are selected during that time, the process ends.

Specifically, these two types of processing will be described. First, in the priority load specifying processing, the priority load L2 having the highest priority is selected from the priority loads L2, L3, and L7. At the stage where the priority load L2 is selected, there is no load specified as the connection target. At this stage, the total power consumption of the selected priority load and the load specified as the connection target is given priority. It becomes equal to the power consumption of the load L2, and is 200W. And since this power consumption is 1000 W or less which is an output upper limit, priority load L2 is specified as a candidate for connection, and is immediately connected to basic track 12.

Subsequently, the priority load L3 having the second highest priority is selected. When the priority load L3 is selected, the load specified as the connection target is the priority load L2. The total power consumption of the priority load L3 and the priority load L2 is 500W. Since this power consumption is 1000 W or less, the priority load L3 is identified as a connection target and immediately connected to the trunk line 12.

Subsequently, the priority load L7 having the third highest priority is selected. At the stage when the priority load L7 is selected, the loads specified as connection targets are the priority loads L2 and L3. The total power consumption of the priority load L7 and the priority loads L2 and L3 is 660W. Since this power consumption is 1000 W or less, the priority load L7 is specified as a connection target and immediately connected to the trunk line 12.
At this time, if the power consumption of the priority load L7 exceeds 1000 W in the total power consumption of the priority loads L2 and L3 already specified, the priority load L7 is not specified as a connection target. As a result, the priority load L7 is not connected to the trunk line 12, and a state where it is cut off from the trunk line 12 is maintained.

Subsequently, the non-priority load L8 with the smallest power consumption is selected from the non-priority loads L1, L4 to L6, L8. At the stage when the non-priority load L8 is selected, the loads specified as connection targets are the priority loads L2, L3, and L7. The total power consumption of the non-priority load L8 and the priority loads L2, L3, and L7 is 700W. Since this power consumption is 1000 W or less, the non-priority load L8 is specified as a connection target and immediately connected to the trunk line 12.

Subsequently, the non-priority load L6 with the second lowest power consumption is selected. At the stage when the non-priority load L6 is selected, the loads specified as connection targets are the priority loads L2, L3, L7 and the non-priority load L8. The total power consumption of the non-priority load L6, the priority loads L2, L3, L7 and the non-priority load L8 is 1000W. Since this power consumption satisfies 1000 W, the non-priority load L6 is specified as a connection target and immediately connected to the trunk line 12. Then, the connection load specifying process ends. The lower load management table T2 in FIG. 2 shows the state of the load management table at this point.

As described above, according to the connection load specifying process, the loads L2 and L3 are specified according to the priority order, and then the next load L7 is specified according to the priority order. At this time, if the total of the power consumption of the loads L2 and L3 exceeds the output upper limit value by specifying the load L7, the load L7 is skipped without specifying, and the lower priority load is specified. Try. Thereby, in addition to the loads L2 and L3, other priority loads can be specified, and these can be connected to the trunk line 12. Therefore, according to the connection load specifying process, it is possible to connect more loads compared to the case of simply connecting loads according to the priority order. Further, when the loads L2, L3, and L7 for which priority is set are connected to the trunk line 12, the power supply device 3 has 340W of remaining power, so the priority is set within the range of the remaining power. The loads L8 and L6 can be connected in ascending order of power consumption among the non-loads. Therefore, when a power failure occurs, it is possible to prevent the load connected to the power supply device 3 from being restricted more than necessary due to the priority set for the load.

Next, an implementation example of the connection load specifying process will be described in detail. 3 and 4 are flowcharts showing a specific flow of the connection load specifying process. In FIG. 3, when the supply of power from the power system 2 is stopped due to a power failure (step S1: YES), the power breaker 14 detects this and opens automatically, and between the power system 2 and the trunk line 12 is detected. Shut off (step S2).

When the power breaker 14 is opened, a trip signal is output from the power breaker 14 to the switching control device 6, and a notification signal is output from the switching control device 6 to the PC 5 in response to the trip signal. The PC 5 recognizes that the power system 2 has stopped based on the notification signal. Subsequently, the PC 5 outputs a command signal instructing to open all the load switches 21 to 28 to the switching control device 6. In response to the command signal, a control signal is output from the switching control device 6 to each load switch 21. In response to the control signal, each load switch 21 to 28 is opened, and all loads L 1 to L 8 are transmitted from the trunk line 12. Blocked. Subsequently, the CPU 41 of the PC 5 turns off the selection flags for all the loads L1 to L8 (step S3).

Subsequently, when the user turns on the input switch 16 to start the power supply from the power supply device 3, the switching control device 6 detects that and outputs a detection signal to the PC 5, and the CPU 41 of the PC 5 Recognizes that the closing switch 16 is turned on based on the detection signal (step S4: YES). Subsequently, the CPU 41 determines whether or not the total power consumption of all the loads L1 to L8 is equal to or less than the output upper limit value (step S5). When the total power consumption of all the loads L1 to L8 is equal to or less than the output upper limit value (step S5: YES), the CPU 41 switches the command signal for instructing to close all the load switches 21 to 28. Output to the control device 6. In response to the command signal, a control signal is output from the switching control device 6 to the load switches 21 to 28, the load switches 21 to 28 are closed according to the control signal, and all the loads L1 to L8 are connected to the main line. 12 is connected. Subsequently, the CPU 41 turns on selection flags for all the loads L1 to L8 (step S6), and ends the connection load specifying process.

On the other hand, if the total power consumption of all the loads L1 to L8 is not less than or equal to the output upper limit value (step S5: NO), the CPU 41 determines whether there is a priority load with the selection flag turned off (step S7). ). If there is a priority load with the selection flag off (step S7: YES), the CPU 41 selects a priority load with the highest priority from among the priority loads with the selection flag off (step S8).

Subsequently, the CPU 41 determines whether or not the total power consumption of the priority load selected in step S8 and the load already closed at this time and connected to the trunk line 12 is equal to or less than the output upper limit value. Is determined (step S9). When the total power consumption of the priority load selected in step S8 and the load already closed at this time and connected to the trunk line 12 is equal to or lower than the output upper limit value (step S9: YES), the CPU 41 outputs to the switching control device 6 a command signal instructing to close the load switch corresponding to the priority load selected in step S8. In response to the command signal, a control signal is output from the switching control device 6 to the load switch. As a result, the load switch corresponding to the priority load selected in step S8 is closed, and the priority load selected in step S8 is connected to the trunk line 12. Subsequently, the CPU 41 turns on the priority load selection flag selected in step S8 (step S10), and returns the process to step S7.

On the other hand, if the total power consumption of the priority load selected in step S8 and the load already closed at this point and connected to the trunk line 12 is not less than the output upper limit value (step S9: NO) The CPU 41 turns on the priority load selection flag selected in step S8 (step S10), and returns the process to step S7. As a result, the priority load selected in step S8 is maintained in the state of being cut off from the trunk line 12.

On the other hand, if there is no priority load with the selection flag turned off in step S7 (step S7: NO), the CPU 41 determines whether there is a non-priority load with the selection flag turned off (step S12). If there is a non-priority load with the selection flag turned off (step S12: YES), the CPU 41 selects a non-priority load with the smallest power consumption from the non-priority loads with the selection flag turned off (step S13). ).

Subsequently, the CPU 41 determines whether or not the total power consumption of the non-priority load selected in step S13 and the load already closed at this time and connected to the trunk line 12 is equal to or less than the output upper limit value. Is determined (step S14). When the total power consumption of the non-priority load selected in step S13 and the load already closed at this time and connected to the trunk line 12 is equal to or lower than the output upper limit value (step S14) CPU41 outputs the command signal which instruct | indicates closing the load switch corresponding to the non-priority load selected by step S13 to the switching control apparatus 6. In response to the command signal, a control signal is output from the switching control device 6 to the load switch. Thereby, the load switch corresponding to the non-priority load selected in step S13 is closed, and the non-priority load selected in step S13 is connected to the trunk line 12. Subsequently, the CPU 41 turns on the selection flag for the non-priority load selected in step S13 (step S15), and returns the process to step S12.

On the other hand, when the total power consumption of the non-priority load selected in step S13 and the load already closed at this time and connected to the trunk line 12 is not less than the output upper limit value (step S14: NO), the CPU 41 turns on the selection flag of the non-priority load selected in step S13 (step S16), and ends the connection load specifying process. As a result, the non-priority load selected in step S13 is maintained in the state of being disconnected from the trunk line 12. In addition, the non-priority load that is not selected in the connection load specifying process is also maintained in a state where it is cut off from the trunk line 12.

On the other hand, if there is no non-priority load with the selection flag turned off in step S12 (step S12: NO), the connection load specifying process ends.

(Connection load re-specific processing)
Further, the power supply control device 1 performs a connection load respecifying process under the control of the CPU 41 of the PC 5. The connection load respecifying process supplies power from the power supply device 3 to the load while the power system 2 is disconnected from the main line 12 and the power supply device 3 is connected to the main line 12 due to a power failure. This is a process of re-specifying a load that should continue to be connected to the trunk line 12 when the remaining power level reaches a preset threshold value. The connection load re-specification process is performed after the connection load identification process is completed when a power failure occurs, and after the elapse of a predetermined time, the remaining amount of power stored in the storage battery 9 to which the power supply device 3 is connected is set to a preset threshold value. In order to continue the operation of the power supply device 3 (in other words, supply of power from the power supply device 3 to the load) up to a predetermined target value (target time) set in advance, the trunk line 12 is started immediately. Is a process of re-specifying a load that should continue to be connected to (i.e., should be disconnected from the trunk line 12).

First, the basic contents of the connection load respecifying process will be described using a second example. The upper part of FIG. 5 shows the load management table T3 at the time when the remaining amount of power from the power supply device 3 connected to the trunk line 12 reaches the threshold during the power failure in the second example. Further, the lower part of FIG. 5 shows the load management table T4 at the time when the connection load respecifying process is completed in the second example.

The second example is an example in the case where the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 reaches a preset threshold after the first example described above. That is, as shown in the lower load management table T2 in FIG. 2, in the load management table T3, the loads L2, L3, and L7 are priority loads, and the loads L1, L4 to L6, and L8 are non-priority loads. Priorities are set for the loads L2, L3, and L7 in this order, and the power consumption of the loads L1 to L8 is as shown in the load management table T2. As a result of the connection load setting process described above due to the occurrence of a power failure, the loads L2, L3, L6 to L8 are connected to the trunk line 12 at the end of the connection load setting process, and the loads L1, L4 and L5 Is cut off from the trunk line 12. It is assumed that the power failure continues in this state, and the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 reaches the threshold during the power failure, that is, the remaining power decreases to a predetermined threshold.

Here, the output suppression value for specifying the load to be cut off from the trunk line 12 in order to reach the target time for the total operation (that is, the total operation time) of the power supply device 3 is the power remaining amount and It is set according to a preset target value of the total operation time of the power supply device 3. For example, when the capacity of the storage battery 9 (output capability of the power supply device 3) is 15000 Wh and the output rating of the power supply device 3 is 1000 W, the target operating time of the storage battery 9 (power supply device 3) is set to 20 hours in advance. It is assumed that the threshold value (that is, the threshold value for forcibly suppressing power consumption) of the remaining power level (the remaining power level supplied from the power supply device 3 to the load) is set to 60%.

Then, when the power supply from the power supply device 3 connected to the storage battery 9 to the load in the state shown in the load management table T3 has elapsed for 6 hours, the power consumption of 1000 W is continued for 6 hours, and thus power of 6000 Wh is consumed. It will be. At this time, the output capacity (15000 Wh) of the power supply device 3 by the PC 5, the total power consumption of the load connected to the power supply device 3 (1000 W), and the measurement result of the operation time of the power supply device 3 (6 hours) ), It is calculated that 6000 Wh of power has been consumed, and that the remaining threshold (remaining power) of the storage battery 9 has reached the set threshold value of 60% (9000 Wh). . Further, based on the remaining power (9000 Wh) and 14 hours that is the remaining time up to 20 hours of the set target operation time of the power supply device 3, the power supply device 3 is operated for the remaining 14 hours. It is detected that the power consumption per hour must be kept within 642.86 W. That is, it is detected that the output suppression value for forcibly cutting off the power consumption of the load currently connected to the trunk line 12 is 642.86 W from the above-described circumstances.

In the connection load respecifying process, according to the output capability of the power supply device 3 by the PC 5, the total power consumption of the loads connected to the power supply device 3, and the measurement result of the operation time of the power supply device 3. When it is detected that the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 has been reduced to the threshold based on the calculated remaining power, the trunk line 12 is Turn off the selection flag for all blocked loads. That is, the load that is not connected to the trunk line 12 at this point is excluded from future selection targets. Thereby, it is possible to minimize the choice of load to be connected and improve the processing efficiency (processing speed) of the connection load respecifying process.

Subsequently, a non-priority load is detected from among the loads connected to the trunk line 12 at this time. At this time, since the non-priority loads L6 and L8 are included in the load connected to the trunk line 12, the non-priority load L6 with the largest power consumption is specified as a cutoff target among the non-priority loads L6 and L8. And immediately cut off from the trunk line 12. That is, at this time, a load with a high priority and a load with low power consumption are selectively left.

By cutting off the non-priority load L6, the total power consumption of the loads connected to the trunk line 12 is 700 W, but this power consumption still exceeds 642.86 W as the output suppression value. Thus, the non-priority load L8 connected to the trunk line 12 is specified as a cutoff target and immediately cut off from the trunk line 12.

The total power consumption of the loads connected to the trunk line 12 is 660 W due to the interruption of the non-priority load L8, but this power consumption still exceeds 642.86 W. At this stage, the loads L2, L3, and L7 connected to the trunk line 12 are all priority loads. In this case, of the priority loads L2, L3, and L7, the priority load L7 having the lowest priority is specified as a cutoff target and is immediately cut off from the trunk line 12.

By cutting off the priority load L7, the total power consumption of the loads connected to the trunk line 12 is 500 W, which is 642.86 W or less. At this stage, since there is a difference of 142.86 W between the total power consumption of the loads connected to the trunk line 12 and the output suppression value, a load whose power consumption is 142.86 W or less is added to the trunk line 12. It is possible to connect. Therefore, the non-priority load L8, which is the load with the lowest power consumption, is additionally connected among the loads L6 to L8 cut off from the trunk line 12 with the selection flag turned on. In other words, the load with the highest priority (load L2) and the load with the lowest power consumption (L8) are identified again as connection targets.

At this time, the total power consumption of the loads connected to the trunk line 12 is 540 W, and is equal to or less than 642.86 W. At this stage, the total power consumption of the loads connected to the trunk line 12 and the output suppression value Since there is a difference of 102.86 W between them, a load having a power consumption of 102.86 W or less can be additionally connected to the trunk line 12. However, among the remaining loads L6 and L7, there is no load whose power consumption is 102.86 W or less, and therefore, only L2, L3, and L8 are specified as loads connected to the trunk line 12 at this time. It becomes. The lower load management table T4 in FIG. 5 shows the state of the load management table at this point.

According to the above connection load respecifying process, when the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 reaches a preset threshold value, the loads L6 and L7 are connected to the trunk line 12. The operating time of the power supply device 3 can be continued to the preset target operating time by reducing the power consumption of the load connected to the trunk line 12 to be equal to or lower than the output suppression value. Thus, according to the connection load respecifying process, as much load as possible is connected to the power supply device 3 within the range of the output suppression value while eliminating the excess of the load connected to the power supply device 3. Thus, the lifetime of the storage battery 9 (operating time of the power supply device 3) can be extended over as long as possible while enabling the use. Therefore, effective use of power in the power supply device 3 can be promoted, and as many loads as possible can be activated to improve convenience for the user.

Next, an implementation example of the interrupt load specifying process will be described in detail. FIG. 6 is a flowchart showing a specific flow of the connection load respecifying process. In FIG. 6, while the power system 2 is disconnected from the main line 12 due to a power failure and the power supply device 3 is connected to the main line 12, the CPU 41 of the PC 5 determines the output capability of the power supply device 3 and the power supply device. The power supply device 3 connected to the trunk line 12 based on the remaining power calculated based on the total power consumption of the loads connected to the power supply 3 and the measurement result of the operation time of the power supply device 3 It is detected that the remaining amount of power supplied from has reached the threshold (step S21: YES). The method of detecting that the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 has reached the threshold is as described above. Subsequently, the CPU 41 turns off selection flags for all loads that are blocked from the trunk line 12 (step S22).

Subsequently, the CPU 41 determines whether or not there is a non-priority load among the loads connected to the trunk line 12 (step S23). When there is a non-priority load among the loads connected to the trunk line 12 (step S23: YES), the CPU 41 has the largest non-priority load among the non-priority loads connected to the trunk line 12 Is cut off from the trunk line 12 (step S24). Specifically, the CPU 41 outputs to the switching control device 6 a command signal instructing to open the load switch corresponding to the non-priority load. In response to the command signal, a control signal is output from the switching control device 6 to the load switch, whereby the load switch is opened and the non-priority load is cut off from the trunk line 12.

Subsequently, the CPU 41 determines whether or not the total power consumption of the loads connected to the trunk line 12 is equal to or less than the output suppression value at the stage where the non-priority load is cut off in step S24 (step S25). . When the total power consumption of the loads connected to the trunk line 12 is equal to or less than the output suppression value (step S25: YES), the CPU 41 shifts the process to step S28. On the other hand, when the total power consumption of the loads connected to the trunk line 12 is not less than or equal to the output suppression value (step S25: NO), the CPU 41 returns the process to step S23.

On the other hand, if there is no non-priority load among the loads connected to the trunk line 12 in step S23 (step S23: NO), the load connected to the trunk line 12 is only the priority load, so the CPU 41 Cuts off the priority load with the lowest priority among the priority loads connected to the trunk line 12 from the trunk line 12 (step S26). That is, the CPU 41 outputs to the switching control device 6 a command signal instructing to open the load switch corresponding to the priority load. In response to the command signal, the switching control device 6 outputs a control signal to the load switch, whereby the load switch is opened and the priority load is cut off from the trunk line 12.

Subsequently, the CPU 41 determines whether or not the total power consumption of the loads connected to the trunk line 12 is equal to or less than the output suppression value at the stage where the priority load is cut off in step S26 (step S27). If the total power consumption of the loads connected to the trunk line 12 is not less than or equal to the output suppression value (step S27: NO), the CPU 41 returns the process to step S26. On the other hand, when the total power consumption of the loads connected to the trunk line 12 is equal to or less than the output suppression value (step S27: YES), the CPU 41 shifts the process to step S28.

Subsequently, in step S28, the CPU 41, at this stage, determines that the difference between the output suppression value and the total power consumption of the load connected to the trunk line 12 is the load that is cut off from the trunk line 12 when the selection flag is on. It is determined whether or not the power consumption is less than the power consumption of the smallest load. At this time, when the difference is not less than the power consumption of the load having the smallest power consumption (step S28: NO), the CPU 41 shifts the processing to step S29.

Next, in step S <b> 29, the CPU 41 connects the load with the lowest power consumption to the trunk line 12 among the loads cut off from the trunk line 12 with the selection flag turned on. That is, the CPU 41 outputs a command signal for instructing to close the load switch corresponding to the load to the switching control device 6. In response to the command signal, a control signal is output from the switching control device 6 to the load switch, whereby the load switch is closed and the load is connected to the trunk line 12.

Subsequently, the CPU 41 returns the process to step S27. On the other hand, in step S28, the difference between the basic output suppression value and the total power consumption of the load connected to the trunk line 12 is that the power consumption is the highest among the loads cut off from the trunk line 12 with the selection flag turned on. If it is less than the power consumption of the small load (step S28: YES), there is no load that can be re-specified (addable) any more, and therefore the connection load re-specific processing ends.

As described above, according to the power supply control device 1 of the present invention, when the remaining amount of power supplied from the power supply device 3 connected to the trunk line 12 reaches a preset threshold, the trunk line By reducing the power consumption of the load connected to 12 to the output suppression value or less, the operation time of the power supply device 3 can be continued to the preset target operation time. As a result, while selecting the load connected to the power supply device 3, it is possible to connect as many loads as possible to the power supply device 3 within the range of the output suppression value and to use them as long as possible. The life of the storage battery 9 (operating time of the power supply device 3) can be extended over time. Therefore, effective use of power in the power supply device 3 can be promoted, and as many loads as possible can be activated to improve convenience for the user.

In addition, according to the power supply control device 1, the actual power consumption of the loads L1 to L8 is acquired by the current transformers 31 to 38 and stored, and the connected load specifying process, the additional load specifying process, and the interrupting load are stored. In the specific process, it is determined whether to connect or disconnect the load to the trunk line 12 using the actual power consumption of the acquired loads L1 to L8. Therefore, the load can be connected and disconnected according to the specific conditions of the loads L1 to L8, and flexible and highly accurate power supply control according to various conditions can be realized.

In the above-described embodiment, the case where the power supply device 3 that takes out the electric power stored in the storage battery 9 of the electric vehicle 8 and supplies it to the distribution board 4 side is used as an example of the power supply device. Is not limited to this. For example, a storage battery or a power generation device may be used as the power supply device.

In the embodiment described above, each time a load is specified as a connection target or a cutoff target in the connection load specifying process and the connection load respecifying process, the load is immediately connected to the main line 12 or cut off from the main line 12. Although the case where it does is given as an example, the present invention is not limited to this. For example, after specifying all loads to be connected to the main line 12 in the connection load specifying process, all specified loads may be connected to the main line 12. In addition, after all the loads to be cut off from the main line 12 in the connection load respecifying process and all the loads to be reconnected to the main line 12 have been specified, all the specified loads are connected to the main line 12; Blocking may be performed.

Further, the present invention can be appropriately changed without departing from the spirit or idea of the invention which can be read from the claims and the entire specification, and a power supply control device with such a change is also a technique of the present invention. Included in thought.

1 Power Supply Control Device 2 Power System 3 Power Supply Device (Power Supply Device)
4 Distribution board 5 Personal computer (main control unit)
6. Switching control device (switching control unit)
7 External circuit breaker 11 Electric circuit (circuit)
12 trunk line 13 branch unit 15 current transformer 21-28 load switch (switch)
31-38 Current transformer (measurement unit)
41 CPU (priority setting unit, power detection unit, load identification unit, priority load identification unit, non-priority load identification unit, operation time measurement unit)
42 Storage unit L1-L8 Load

Claims

A power supply control device that is interposed between a power supply device and a plurality of loads, and controls power supply from the power supply device to each of the loads when power supply from the power system to each of the loads is stopped due to a power failure. There,
A main control unit that controls the entire system,
A circuit for connecting the loads in parallel to the power supply device;
A plurality of switches corresponding to each of the loads in the circuit, and a switch for switching an energized state between the power supply device and each of the loads to connection or disconnection,
A priority setting unit for setting a priority for each of the loads;
One load is selected from each of the loads according to the priority, and the total power consumption of the selected load and the load specified as the connection target is set according to the output capability of the power supply device When the output is not more than the output upper limit, the selected load is specified as a connection target, and the total power consumption of the selected load and the load specified as the connection target is not less than the output upper limit value A load specifying unit that repeatedly performs load specifying processing such as not specifying the selected load as a connection target for all of the plurality of loads; and
Switching control of the switch corresponding to the load specified as a connection target by the load specifying unit, and connecting the load specified as the connection target to the power supply device; and
An operation time measuring unit that measures the operation time of the power supply device, and
The main control unit
The output capability of the power supply;
The total power consumption of the loads connected to the power supply,
When the remaining amount of power of the power supply device calculated according to the measurement result of the operation time measuring unit reaches a preset threshold value,
Among the loads connected to the power supply device, the load specifying unit re-specifies the load with the highest priority and the load with the lowest power consumption as connection targets, and is not specified again. One load is selected from the remaining loads connected to the power supply device according to the priority order, and the total power consumption of the selected load and the re-specified load is determined by the power supply device. When the power remaining amount is equal to or lower than the output suppression value reset according to the preset target value of the total operating time of the power supply device, the selected load is specified again as a connection target, and the selection is performed. Load re-specification processing that specifies the selected load as a shut-off target when the total power consumption of the specified load and the re-specified load is not less than or equal to the output suppression value Performed for all loads connected to the power supply,
The switching control unit switches and controls the switch corresponding to the load specified as the shut-off target by the load specifying unit, shuts off the load specified as the shut-off target from the power supply device, and A power supply control device characterized by adjusting power consumption of a connected load.
A measurement unit for measuring the power consumption of each of the loads;
A storage unit that stores a measurement value of power consumption of each of the loads measured by the measurement unit;
The said load specific | specification part calculates the sum total of the said power consumption using the measured value of the power consumption of each said load measured by the said measurement part and memorize | stored in the said memory | storage part. Power supply control device.
A power supply control device that is interposed between a power supply device and a plurality of loads, and controls power supply from the power supply device to each of the loads when power supply from the power system to each of the loads is stopped due to a power failure. There,
A main control unit that controls the entire system,
A circuit for connecting the loads in parallel to the power supply device;
A plurality of switches corresponding to each of the loads in the circuit, and a switch for switching an energized state between the power supply device and each of the loads to connection or disconnection,
A priority setting unit configured to set a priority only for the priority load, a part of each of the loads as a priority load, a remaining part as a non-priority load,
One priority load is selected according to the priority, and the total power consumption of the selected priority load and the priority load specified as the connection target is the output upper limit set according to the output capability of the power supply device If it is less than or equal to the value, the selected priority load is identified as the connection target, and the total power consumption of the selected priority load and the priority load identified as the connection target is not less than or equal to the output upper limit value In this case, a priority load specifying unit that repeatedly performs a priority load specifying process for not specifying the selected priority load as a connection target for all priority loads, and
After the priority load specifying process is performed for all priority loads by the priority load specifying unit, one non-priority load is selected in order of power consumption, and the selected non-priority load is specified as a connection target. A non-priority load specifying unit that repeatedly performs the non-priority load specifying process as long as the total power consumption of the selected non-priority load and the load specified as the connection target is equal to or less than the output upper limit value;
A switching control unit for controlling the switching of the switch corresponding to the load specified as the connection target by the priority load specifying unit and the non-priority load specifying unit, and connecting the load specified as the connection target to the power supply device; ,
An operation time measuring unit that measures the operation time of the power supply device, and
The main control unit
The output capability of the power supply;
The total power consumption of the loads connected to the power supply,
When the remaining amount of power of the power supply device calculated according to the measurement result of the operation time measuring unit reaches a preset threshold value,
Among the loads connected to the power supply device, the priority load specifying unit and the non-priority load specifying unit set the priority load having the highest priority and the non-priority load having the smallest power consumption as connection targets. At least one of the one priority load and the non-priority load with the largest power consumption among the remaining loads connected to the power supply apparatus that has not been specified again is specified according to the priority. And the total power consumption of the selected load and the load specified again is re-established according to the remaining power level of the power supply device and the preset target value of the total operation time of the power supply device. If it is less than or equal to the set output suppression value, the selected load is specified again as a connection target, and the power consumption of the selected load and the specified load again is determined. If total is not equal to or less than the output inhibition values for load re-identification process such identifying the selected load as a blocking object for all loads connected to the power supply,
The switching control unit switches and controls the switch corresponding to the load specified as the shut-off target by the load specifying unit, shuts off the load specified as the shut-off target from the power supply device, and A power supply control device characterized by adjusting power consumption of a connected load.
A measuring unit for measuring the power consumption of each load;
A storage unit for storing a measured value of power consumption of each load measured by the measurement unit;
The priority load specifying unit and the non-priority load specifying unit calculate the total power consumption using the measured power consumption value of each load measured by the measurement unit and stored in the storage unit. The power supply control apparatus according to claim 3, wherein the power supply control apparatus is a power supply control apparatus.