JP2013198219A - Power control system, management device for power control and power control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic control method of a computer system capable of corresponding even when a temporary increase in consumed electric energy occurs.SOLUTION: In a power control system, a plurality of computer systems, a management system for managing power data of the plurality of computer systems, and a first computer system included in the plurality of computer systems transmit to the management system a request notification for requesting a change in their own upper limit usage power value in accordance with own consumed electric energy, the management system determines the acceptance/rejection of changing an upper limit usage power value to the first computer system in response to the request notification, and transmits to the first computer system a change permission notification for permitting a change in the upper limit usage power value, and the first computer system changes the upper limit usage power value in response to the change permission notification.

Description

  The present invention relates to a power control system, a management apparatus, and a power control method for a computer system. In particular, the present invention relates to an automatic power control system, a management apparatus, and a power control method that change the power consumption of a computer system without changing the maximum power consumption of a network group having a plurality of computer systems.

  Generally, as a power control for computer systems in a network group, it is effective to set a Capping value for each computer system in accordance with the maximum usable power amount in the network group. However, when the total amount of power used in the network group reaches the maximum usable power amount, power cannot be distributed any more. In order to increase the total power consumption in such a limited maximum usable power amount, it is effective to construct a power control system using a storage battery.

  Patent Document 1 discloses a method related to control of peak shift of electric power demand as management of use of stored electric power. In Patent Document 1, the management computer system acquires information on the peak shift possible time and peak shift power for each electrical device, holds the information in a database, performs efficient peak shift time and charge time calculation, We are trying to solve the smoothing of the power used by managing the use and charging of the stored power.

  In Patent Document 2, in a semiconductor manufacturing apparatus in which a power consumption upper limit value is set, power consumption profiles of a plurality of processing apparatuses having different power consumptions are measured in advance, and a total power consumption of processing apparatuses to be used is predicted. A method of supplying excess power from a storage battery is disclosed.

  Patent Document 3 discloses a power supply system that measures the amount of power used in the entire zone including a plurality of individual areas, and performs power supply control from a shared power source having a storage battery in the individual areas according to the situation. In Patent Document 3, when the power consumption of the entire zone reaches a specified value, a contract is performed in which the power consumption of the entire zone is larger than the specified value by performing control to supply power from at least one individual area from the shared power supply. Avoid reaching the power value.

JP 2007-336796 A JP 2003-143762 A JP 2011-130649 A

  A computer system in a network group has a problem that processing delay occurs due to performance degradation due to Capping set according to the maximum usable power amount when processing increases.

  Further, in the invention described in Patent Document 1, since the switching to the use of stored power is performed statically for each calculated time zone, when the amount of power used increases outside the stored power use time, Even if there is enough power, it cannot be used. Therefore, even if the stored power is sufficient, there is a problem that the stored power cannot be used even if the stored power is sufficient when the amount of used power increases outside the stored power usage time.

  In the invention described in Patent Document 2, since the power consumption of the processing apparatus is constant, the power consumption can be predicted in advance. However, in a system in which power consumption fluctuates, there is a problem that it is difficult to predict power consumption in advance.

  In the invention described in Patent Document 3, an external control device monitors and controls the power usage status of each individual area, but each individual area cannot autonomously set and control the power supply value. There is a problem.

  An object of the present invention is to provide a power control system, a management apparatus, and a power control method for a computer system that can cope with a temporary increase in power consumption.

  A power control system according to the present invention includes a plurality of computer systems and a management system that manages power data of the plurality of computer systems, and the first computer system included in the plurality of computer systems has its own power consumption. A request notification requesting to change its own upper limit power usage value is sent to the management system, and the management system determines whether the upper limit power usage value of the first computer system can be changed according to the request notification, When the upper limit power consumption value can be changed, a change permission notification for permitting the change of the upper limit power consumption value is transmitted to the first computer system, and the first computer system responds to the change permission notification to the upper limit power consumption power. Change the value.

  The management device of the present invention is a management device that manages power data of a plurality of computer systems, and the first computer system included in the plurality of computer systems has its own upper limit used power according to its own power consumption. When a request notification for requesting a change in value is received, it is determined whether or not the upper limit used power value of the first computer system can be changed according to the request notification, and when the upper limit used power value can be changed, A change permission notice for permitting the change of the upper limit use power value is transmitted to the first computer system.

  The power control method of the present invention is a management in which a plurality of computer systems capable of supplying power from a power storage device control the total power consumption of the plurality of computer systems to be equal to or less than a maximum usable power amount via a network. A power control method for a network group connected to a system, wherein an upper limit power use value is changed according to a power use amount of a first computer system included in a plurality of computer systems, and is included in the plurality of computer systems. The power supply to the computer system 2 is switched from the commercial power supply to the stored power.

  ADVANTAGE OF THE INVENTION According to this invention, the total electric energy which can be used temporarily can be increased, without changing the value of the maximum available electric energy in a network group. Therefore, even when a temporary increase in power consumption occurs in the network group, the computer system can be automatically controlled.

It is a block diagram which shows the whole structure of the network group of embodiment of this invention. It is a block diagram which shows an example of the electrical storage apparatus of embodiment of this invention. It is a figure which shows the power control information management table in embodiment of this invention. It is a figure which shows the priority information management table in embodiment of this invention. It is a figure which shows the electric power control information table in embodiment of this invention. It is a figure which shows the electrical storage information table in embodiment of this invention. It is a graph showing the time change of the electric power used of the computer system of embodiment of this invention. It is a graph showing the time change of the electric power used of the computer system of embodiment of this invention. It is a figure which shows an example of the power control information management table of embodiment of this invention. It is a flowchart of the electric power control of Example 1 of this invention. It is a flowchart of the electric power control of Example 2 of this invention. It is a flowchart of the electric power control of Example 3 of this invention. It is a flowchart of the electric power control of Example 4 of this invention. It is a flowchart of the electric power control of Example 5 of this invention. It is a block diagram which shows the modification of the network group of embodiment of this invention. It is explanatory drawing of operation | movement of the modification of embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. The embodiments of the present invention are not limited to the configurations and numerical values shown in the drawings.

(Constitution)
FIG. 1 is a block diagram showing an overall configuration of a network group according to an embodiment of the present invention. The network group according to the embodiment of the present invention includes a plurality of computer systems, a management system 1 connected to the plurality of computer systems via the network 10, and a power storage device 3 that supplies power to the plurality of computer systems. The management system 1 is an embodiment of a management device that manages power data of a plurality of computer systems.

  The management system 1 includes a BMC (Base Management Controller: here also referred to as “power management apparatus”) 11 and storage units 12 and 13. The BMC 11 performs power management of the network group.

  The plurality of computer systems includes computer systems C1, C2, and C3, and further includes n-3 computer systems including the computer system Cn. Further, the upper limit of the number of computer systems is not particularly limited. In the following description of the configuration and operation of the present embodiment, the computer systems C1 to Cn are collectively referred to as a computer system 2 respectively.

  The computer system 2 belonging to the network group of this embodiment includes a BMC 25, a power measurement unit 27, a power control unit 28, and a storage unit 26.

  The power measuring unit 27 can measure the power used by the computer system 2. The power control unit 28 has a function of executing power control of the computer system 2 based on an instruction from the BMC 25. The BMC 25 performs power management of the computer system 2 in accordance with information from the storage unit 26 and the power measurement unit 27, and changes a Capping value (upper limit power usage value) described later. The computer system 2 can be connected to the power storage device 3 to receive power supply. Note that each of the plurality of computer systems has the above-described configuration.

  The power storage device 3 includes a BMC 32 and a storage unit 31 connected to the BMC 32. Furthermore, the electrical storage apparatus 3 is provided with the electrical storage amount measurement part 33 and the storage battery 34, as shown in FIG. In FIG. 2, the storage unit 31 is omitted. The power storage device 3 acquires power from the commercial power supply 4 and stores the power, and supplies the stored power to one of the computer systems in response to an instruction from the management system 1 that receives the power via the network 10.

  The BMC 32 switches the use of stored power and monitors the remaining amount of stored power. The storage amount measuring unit 33 measures the amount of stored power of the storage battery 34 and notifies the BMC 32 of the remaining amount of stored power. The storage battery 34 is charged by connection with the commercial power source 4 and stores electric power.

  Each BMC may be configured by a computer circuit including a CPU and a storage device, and may execute power control based on a control program stored in the storage device.

(Parameter)
Hereinafter, parameters related to power control of the network group of the present embodiment will be described.

  The Capping value is a threshold value of power used by the computer system 2 and is an upper limit usable power value. The power control unit 28 performs power control so that the amount of power used by the computer system 2 does not exceed the Capping value.

  The notification determination threshold is a threshold for determining the necessity of redistribution of used power. As the notification determination threshold, a power value smaller than the Capping value by a notification determination constant is set. The notification determination constant is a numerical value notified from the BMC 11 of the management system 1 to the computer system 2 when the computer system 2 is activated, and is a value used for obtaining a notification determination threshold value.

  The notification determination time is a time for determining the necessity of redistribution of used power. When the power consumption of the computer system 2 exceeds (or falls below) the notification determination threshold for the notification determination time, the BMC 25 requests the management system 1 to redistribute power.

(Power control information management table)
The storage unit 12 included in the management system 1 has a power control information management table 40 (FIG. 3). The power control information management table 40 has common information for power control of the computer systems 2 in the network group. The power control information management table 40 includes a maximum usable power amount in the network group, a changed Capping unit, an initial Capping value, a notification determination constant, and a notification determination time.

  The maximum usable power amount is the maximum value of the power amount that can be used in the network group. The maximum usable power amount is an upper limit value of the power amount supplied from the commercial power source 4 to the computer system in the network group, and is a fixed value.

  The changed Capping unit is a unit value for changing the Capping value by redistributing the used power once.

  The initial Capping value is the default Capping value for each computer system in the network group.

  The notification determination constant is a value used for obtaining a notification determination threshold.

  As described above, the notification determination time is a time for determining the necessity of redistribution of used power.

  The above is the common information that the power control information management table 40 has.

  The initial Capping value, the notification determination constant, and the notification determination time are notified from the management system 1 to the computer system 2 when a new computer system 2 is registered as a network group managed by the management system 1. .

(Priority information management table)
The storage unit 13 included in the management system 1 has a priority information management table 50 (FIG. 4). The priority information management table 50 includes information about each computer system in the network group. The priority information management table 50 is composed of a plurality of records associated with each IP address. Each record has a priority, an IP address, a Capping value, a stored power usage state, and a Capping value increase request flag.

  The priority is a priority when redistributing power.

  The IP address is an IP address of each computer system belonging to the network group.

  The Capping value is the current Capping value of each computer system belonging to the network group. When the computer system 2 is activated, the initial Capping value of the power control information management table 40 is set.

  The stored power usage state is ON when the stored power is used, and OFF when the stored power is not used.

  The rising request flag of the Capping value is ON when there is a request for redistribution, and OFF when there is no request for redistribution.

  The above is the information that the priority information management table 50 has.

  The Capping value, the stored power usage status, and the rising request flag for the Capping value in the priority information management table 50 are updated according to the notification from the BMC 25 of the computer system 2 and the BMC 32 of the power storage device 3.

(Power control information table)
The storage unit 26 included in the computer system 2 includes a power control information table 60 (FIG. 5). The power control information table 60 has information regarding power control of the computer system 2. The power control information table 60 includes a Capping value, a changed Capping unit, a notification determination threshold, and a notification determination time.

  The Capping value is a copy of the initial Capping value of the power control information management table 40. The changed Capping unit and the notification determination time are copies of values in the power control information management table 40. These values are notified from the management system 1 to the computer system 2 when the computer system 2 is registered in the network group managed by the management system 1.

  The notification determination threshold is a value obtained by subtracting a notification determination constant from the Capping value of each computer system.

  The above is the information that the power control information table 60 has.

(Power storage information table)
The storage unit 26 included in the power storage device includes a power storage information table 70 (FIG. 6). The power storage information table 70 has information about the power storage device 3. The power storage information table 70 includes a usable threshold value, a use stop threshold value, and a stored power amount.

  The usable threshold is a threshold for determining that the stored power can be used.

  The use stop threshold is a threshold for determining stop of use of the stored power.

  The amount of stored power is the amount of power stored by the power storage device.

  The above is the information that the power storage information table 70 has.

(Operation)
The basic operation of the embodiment of the present invention will be described below.

  In the computer system 2, the IP address of the management system 1 and the connection position number of the power storage device 3 are set in advance. The computer system 2 communicates with the management system 1 at the time of activation and registers it in the BMCs 11 and 25 as a power control network group. At this time, the computer system 2 notifies the BMC 11 of the management system 1 of the connection position number of the power storage device 3.

  When receiving the notification from the BMC 25 of the computer system 2, the BMC 11 of the management system 1 notifies the computer system 2 of the initial Capping value, the notification determination constant, and the notification determination time.

  In the power storage device 3, the IP address of the management system 1 is set in advance for communication connection via the network 10. The power storage device 3 registers with the BMCs 11 and 32 as a power control network group by communicating with the management system 1 at startup.

  When the BMC 11 of the management system 1 receives a notification such as a request for redistribution of used power from the computer system 2 or a notification of execution of a decrease in the Capping value, the BMC 11 checks the amount of power used in the network group and increases the Capping value. Permission and information update in the priority information management table 50 are performed. When confirming the power usage, the BMC 11 of the management system 1 is notified of the power usage by the BMC 25 of each computer system and stores it in an internal memory (not shown).

  The computer system 2 measures its own power using the power measuring unit 27. As shown in FIG. 7A, when the BMC 25 determines that the used power measured by the power measuring unit 27 continues to exceed the notification determination threshold for the notification determination time, the BMC 25 Notification of redistribution request.

  When the BMC 25 of the computer system 2 receives the notification of permission to increase the Capping value from the management system 1, the BMC 25 of the computer system 2 increases the Capping value of the computer system 2 through the power control unit 28 (FIG. 7B).

  Further, as shown in FIG. 8A, the BMC 25 determines that the power consumption measured by the power measuring unit 27 continues to fall below the notification determination threshold for the notification determination time. As shown in the figure, the Capping value is set low, and the management system 1 is notified that the Capping value is lowered.

  When changing the Capping value, the computer system 2 recalculates the notification determination threshold and updates the power control information table 60 (FIGS. 7B and 8B).

  The BMC 32 of the power storage device 3 controls to charge the storage battery 34 from the commercial power supply 4 when there is no computer system 2 using the stored power. When there is a computer system 2 that uses stored power, the BMC 32 monitors the stored power amount via the stored power measuring unit 33. The BMC 32 of the power storage device 3 notifies the management system 1 that the stored power cannot be used when the stored power amount of the storage battery 34 falls below the use stop threshold.

  Next, the flow of power control will be described with examples. In the drawings of the following embodiments, the management system is abbreviated as MC, the computer system as CS, and the power storage device as BS. Further, when a specific computer system is designated among the computer systems, it is described as C1, C2, C3, Cn, or the like. Note that the power control of the present embodiment is not limited to the following power control examples.

  In the following embodiment, the power control information management table 41 stored in the storage unit 12 of the management system 1 is as shown in FIG. Further, the computer system of the network group of the following embodiment is composed of C1, C2, and C3. The power management of each device is performed by the BMC provided in each device, but in the description of the embodiment, it is described that each device performs power management.

Example 1
The first embodiment relates to power control in the case where stored power is not used, and is performed according to the following flow (see FIG. 10).

  Example 1 shows an example of power control in the case where there is no computer system that raises the Capping value, and when the power consumption continues to exceed the notification determination threshold for the notification determination time for the notification determination time C1. . In the first embodiment, since the total power consumption of the network group does not exceed the maximum usable power of the network group, the power storage device 3 is not used.

  In the first embodiment, an example in which the initial Caping values of C1, C2, and C3 are all 100 W is shown.

  In FIG. 10, C1 measures its own power usage by the power measurement unit 27 (step 101).

  The BMC 25 of C1 determines whether or not its power usage continues to exceed the notification determination threshold for the notification determination time (step 102).

  When the used power of C1 continues to exceed the notification determination threshold for the notification determination time, the BMC 25 notifies the management system 1 of a request for redistribution of the used power (step 103).

  The BMC 11 of the management system 1 calculates the total power consumption in the network group in response to the redistribution request (step 104).

  In the first embodiment, all of the Capping values of the computer system are 100 W, and the sum of the Capping values in the network group is 300 W. Since the changed Capping unit is 20 W (FIG. 9), when the C1 Caping value is changed, the sum of the Capping values in the network group is 320 W. This sum is calculated by the BMC 11.

  The BMC 11 of the management system 1 refers to the storage unit 12 when the Capping value of C1 is increased by the changed Capping unit, and whether or not the total power consumption in the network group exceeds the maximum usable power in the network group. Is determined (step 105).

  In the first embodiment, the total power consumption in the network group is 320 W, and the maximum usable power in the network group is 400 W. That is, the total power consumption in the network group is less than the maximum usable power in the network group.

  A case where the management system 1 determines in step 103 that the total power consumption in the network group exceeds the maximum usable power in the network group will be described in the second embodiment.

  The BMC 11 of the management system 1 notifies C1 of permission to increase the Capping value (step 106). At this time, the management system 1 updates the C1 Capping value registered in the priority information management table 50 stored in the storage unit 13.

  The BMC 25 of C1 receives the notification of permission to increase the Capping value from the management system 1, and increases the Capping value (Step 107). The power control unit 28 of C1 performs power control based on the updated Capping value. At this time, the C1 BMC 25 recalculates the notification determination threshold and updates the power control information table 60 stored in the storage unit 26.

  The above is the description of the first embodiment. In the first embodiment, the power control can be performed in the same manner even if the computer systems C2 to Cn are replaced with the power control of C1.

(Example 2)
Example 2 relates to power control in the case of using stored power and performs the following flow (see FIG. 11).

  In the second embodiment, an example of power control in the case of increasing the C1 Capping value in which the power used continues to exceed the notification determination threshold for the notification determination time or more will be described. In the second embodiment, since the total power consumption of the network group exceeds the maximum usable power of the network group, an example in which the power storage device 3 is used is shown.

  In Example 2, the initial Capping values of C1, C2, and C3 are 160 W, 100 W, and 140 W, respectively, and an example of performing power control that switches the power of C2 to the stored power in order to increase the Capping value of C1 is shown. . In the second embodiment, the sum of the Capping values in the network group is 400W.

  In the second embodiment, the total power consumption in the network group is 400 W, and the maximum usable power in the network group is 400 W. That is, the total amount of power used in the network group is equal to or greater than the maximum usable power in the network group.

  In the second embodiment, steps 101 to 105 are executed in the same manner as in the first embodiment before step 201. However, since the operations up to step 104 are the same, the description thereof is omitted.

  The BMC 11 of the management system 1 compares the total power amount currently used (400 W) with the maximum usable power amount (400 W) in the network group and determines that there is no power that can be distributed (step 105 in FIG. 10). ).

  Next, in FIG. 11, the BMC 11 of the management system 1 requests the power storage device 3 to confirm whether or not the stored power can be used (step 201).

  The power storage device 3 measures the stored power of the storage battery 34 by using the storage amount measuring unit 33 (step 202).

  The BMC 32 of the power storage device 3 determines whether or not the amount of stored power is equal to or greater than the usable threshold (step 203).

  The BMC 32 of the power storage device 3 notifies the management system 1 that the stored power is unusable when the current stored power amount is smaller than the usable threshold (step 204).

  The BMC 32 of the power storage device 3 notifies the management system 1 that the stored power can be used when the current stored power amount is equal to or greater than the usable threshold (step 205).

  Upon receiving the notification, the BMC 11 of the management system 1 notifies the power storage device 3 to supply power from the stored power to C2, which is the computer system currently having the smallest Capping value (low power consumption) (Step S1). 206).

  Based on the notification, the BMC 32 of the power storage device 3 stops charging the storage battery 34 and switches the power supply from the management system 1 to the designated computer system (C2) to the stored power (step 207).

  The BMC 32 of the power storage device 3 notifies the management system 1 of the execution result (step 208).

  The BMC 11 of the management system 1 determines that the amount of power that can be distributed has been created by excluding the used power of C2 whose power supply has been switched to the stored power from the total used power amount in the network group according to the execution result ( Step 209).

  The BMC 11 of the management system 1 notifies C1 of permission to increase the Capping value (Step 210).

  The C1 BMC 25 increases the Capping value (step 211). The power control unit 28 of C1 performs power control based on the updated Capping value. At this time, the C1 BMC 25 recalculates the notification determination threshold and updates the C1 power control information table 60.

  The above is the description of the second embodiment. In the second embodiment, power control for switching C2 to stored power in order to increase the Capping value of C1 has been described. However, the control can be similarly performed even if it is replaced with another computer system.

(Example 3)
The third embodiment relates to power control for stopping the use of stored power due to a decrease in power used by a computer system (see FIG. 12).

  In the third embodiment, the power used by C1 continues to fall below the notification determination threshold for the notification determination time in a situation where power is supplied to at least C1 from the power storage device 3. The example of the power control which transmits notification is shown.

  In the third embodiment, the initial Capping values of C1, C2, and C3 are 180 W, 100 W, and 140 W, respectively, and when the power used by C1 continues to fall below the notification determination threshold for the notification determination time, the C1 Capping value is set. An example of performing power control to lower to 160W is shown.

  In FIG. 12, C1 measures its own power usage by the power measurement unit 27 (step 301).

  The C1 BMC 25 determines whether or not its power consumption continues to exceed the notification determination threshold for the notification determination time (step 302).

  The C1 BMC 25 reduces the Capping value when the power used by C1 continues to fall below the notification determination threshold for the notification determination time (step 303). At this time, the C1 BMC 25 recalculates the notification determination threshold and updates the C1 power control information table 60.

  The BMC 25 of C1 notifies the management system 1 of the notification that the Capping value is reduced (step 304).

  The BMC 11 of the management system 1 calculates the total power consumption in the network group including the C2 that uses the stored power when receiving the notification that the Capping value decreases from the C1 (Step 305).

  In the third embodiment, since the Capping values of C1, C2, and C3 are 180 W, 100 W, and 140 W, respectively, the sum of the Capping values in the network group is 420 W. Since the changed Capping unit is 20 W (FIG. 9), when the C1 Caping value is changed, the total power consumption in the network group (the sum of the Capping values) is 400 W.

  In FIG. 12, the BMC 11 of the management system 1 determines whether or not the total amount of power used in the network group is smaller than the maximum usable power amount (400 W) (step 306).

  The BMC 11 of the management system 1 notifies the power storage device 3 to switch the power source of C2 using the stored power from the stored power to the commercial power source 4 (step 307).

  When the total power consumption in the network group is larger than the maximum usable power amount, the BMC 11 of the management system 1 does not issue a notification to switch the power supply to the power storage device 3 (to step 301).

  The BMC 32 of the power storage device 3 switches the power source of C2 designated by the management system 1 to the commercial power source 4 in response to the switching notification in Step 307 (Step 308).

  The BMC 32 of the power storage device 3 determines whether or not there is a computer system that uses the stored power (step 309).

  If there is no computer system that uses the stored power, the BMC 32 of the power storage device 3 resumes charging the storage battery 34 (step 310).

  If there is a computer system using the stored power, the power storage device 3 continues to supply the stored power to the computer system using the stored power (to step 301).

  The BMC 32 of the power storage device 3 notifies the management system 1 of the implementation result (step 311).

  The above is the description of the third embodiment. In the third embodiment, the example in which the stored power of C2 is switched to the commercial power supply in response to the decrease in the C1 Capping value has been described.

Example 4
The fourth embodiment relates to power control for stopping the use of the stored power due to a decrease in the stored power amount, and performs the following flow (see FIG. 13).

  In the fourth embodiment, in the situation where the stored power is being supplied from the power storage device 3 to C1 and C3, the stored power amount of the power storage device 3 has fallen below the use stop threshold, so C3 having a lower priority in the priority information management table is selected. An example of power control when switching to a commercial power supply is shown.

  In the fourth embodiment, an example of performing power control in which the initial Capping values of C1, C2, and C3 are 180 W, 100 W, and 140 W, respectively, and the C2 Capping value is decreased and the stored power is switched to the commercial power supply 4 is shown.

  In FIG. 13, the power storage device 3 measures its own stored power by the stored power amount measuring unit 33 (step 401).

  The BMC 32 of the power storage device 3 determines whether or not the amount of stored power has fallen below the use stop threshold (step 402).

  The BMC 32 of the power storage device 3 notifies the management system 1 that the stored power cannot be used when the stored power amount falls below the use stop threshold (step 403).

  The BMC 11 of the management system 1 receives the notification and, among the devices that are increasing the Capping value, notifies the C3, which is a computer system with a low priority in the priority information management table 50, a request to decrease the Capping value. (Step 404).

  The BMC 25 of the C3 that has received the request notification of a decrease in the Capping value executes a decrease in the Capping value based on the notification (Step 405). The power control unit 28 of C3 performs power control based on the updated Capping value.

  The C3 BMC 25 notifies the management system 1 that the Capping value has been lowered (step 404).

  In response to the execution notification, the BMC 11 of the management system 1 performs the Capturing to the computer system until the total power consumption in the network group including the device using the stored power becomes smaller than the maximum usable power amount. A request for lowering the value is sent (step 406).

  The BMC 11 of the management system 1 calculates the sum of the Capping values in the network group (Step 407).

  In the fourth embodiment, since the Capping values of C1, C2, and C3 are 180 W, 100 W, and 140 W, respectively, the sum of the Capping values in the network group is 420 W. Since the changed Capping unit is 20 W (FIG. 9), when the C3 Caping value is changed, the total power consumption in the network group (the sum of the Capping values) is 400 W.

  In FIG. 13, the BMC 11 of the management system 1 determines whether or not the total amount of power used in the network group is smaller than the maximum usable power amount (400 W) (step 408).

  The BMC 11 of the management system 1 notifies the power storage device 3 that charging of the storage battery 34 can be started when the total power consumption in the network group becomes smaller than the maximum power consumption (400 W) (step 409). .

  Based on the notification, the BMC 32 of the power storage device 3 switches the power source of C2 using the stored power to the commercial power source 4 (step 410).

  The BMC 32 of the power storage device 3 determines whether there is a computer system that uses the power stored in the power storage device 3 (step 411).

  The BMC 32 of the power storage device 3 starts charging the storage battery 34 when there is no computer system using the stored power of the power storage device 3 (step 412).

  The BMC 32 of the power storage device 3 notifies the management system 1 of the implementation result (step 413).

  The above is the description of the fourth embodiment. In the fourth embodiment, when the amount of stored power of the power storage device 3 falls below the usable threshold, an example is shown in which the stored power supplied to C2 having a low priority is switched to commercial power. Even if the system is replaced, the same control can be performed.

(Example 5)
The fifth embodiment relates to power control when the management system 1 receives a request for redistribution of used power from the computer system, as follows (see FIG. 14).

  In the fifth embodiment, an example of power control when the management system 1 receives a notice of request for redistribution of used power from the computer system 2 when the power storage device 3 cannot be used during charging will be described.

  In the fifth embodiment, it is assumed that C1 is a computer system that sends a notice of request for redistribution of used power, and C2 is a computer system with a low priority.

  In FIG. 14, the BMC 11 of the management system 1 determines whether or not a notice of request for redistribution of used power has been received when the storage battery 34 is being charged and the stored power cannot be used (step 501).

  When the BMC 11 of the management system 1 receives a notification of redistribution of used power from C1, in the priority information management table 50 stored in the storage unit 13, the CMC's Capping value increase request flag is set to ON ( Step 502).

  The BMC 11 of the management system 1 determines whether or not it has received a notification that the Capping value has been reduced from C1 (step 503).

  When the BMC 11 of the management system 1 receives the notification that the Capping value is reduced from C1, the BMC 11 sets the Capping value increase request flag to OFF in response to the notification (Step 504).

In FIG. 14, the power storage device 3 measures the amount of stored power by the stored power amount measuring unit 33 (step 505).
The BMC 32 of the power storage device 3 determines whether or not the amount of stored power exceeds the usable threshold (step 506).

  When the amount of stored power exceeds the usable threshold, the BMC 32 of the power storage device 3 sends a usable notification of stored power to the management system 1 (step 507).

  When there is a computer system whose Caping value increase request flag is ON, the BMC 11 of the management system 1 notifies the power storage device 3 to supply the stored power to C2, which is a computer system with a low priority (step 508). ).

  In response to the notification, the BMC 32 of the power storage device 3 starts supplying the stored power to C2 (step 509).

  The BMC 32 of the power storage device 3 notifies the management system 1 of the result of switching the stored power (step 510).

  In response to the notification, the BMC 11 of the management system 1 notifies the C1 of permission to increase the Capping value (Step 511).

  The BMC 25 of C1 increases the Capping value and updates the power control information table 60 stored in the storage unit 26 (Step 512).

  The above is the description of the fifth embodiment. In the fifth embodiment, an example in which a request for redistribution of the power used for C1 is received and power supplied to C2 having a low priority is switched to stored power is shown. It can be controlled similarly.

  The characteristics and effects of the power control method of the computer system 2 in the network group according to the embodiment of the present invention are summarized as follows.

  First, the BMC 11 of the management system 1 holds power control information in the network group and instructs the computer system 2 in the network group to increase or decrease the amount of power used by network communication. In addition, the BMC 11 of the management system 1 instructs the power storage devices 3 in the network group to switch the use of the stored power.

  Therefore, a plurality of computer systems connected by a network and the power storage devices 3 to which the computer systems are connected can be handled as one network group, and power control by the network group can be automatically performed.

  Second, the BMC 25 of the computer system 2 in the network group monitors the used power from the power measuring unit 27, requests the management system 1 for the used power amount, and in response to an instruction from the management system 1, the power control unit 28. To change the Capping value of the used power.

  Therefore, the control of the total power consumption in the network group and the use of the stored power of the power storage device 3 by Capturing of each computer system can be performed together.

  Third, when the power storage device 3 in the network group switches the use of the stored power according to an instruction from the management system 1 and monitors the stored power amount from the stored power amount measuring unit 33, the stored power amount decreases. To the management system 1.

  Therefore, when the processing of each computer system in the network group increases and the total power consumption reaches the maximum usable power in the network group, the total usage in the network group is temporarily used using the stored power. The amount of power can be increased. As a result, it is possible to increase the Capping value of each computer system, and to suppress processing delay due to performance degradation.

(Modification)
The embodiment of the present invention may be a modified example as shown in FIG.

  In the modification shown in FIG. 15, the network group includes a network 80, a management system 81, a plurality of computer systems 82, and a plurality of power storage devices 83. Further, a commercial power supply 84 is connected to the power storage device 83. However, each device includes the components described in the embodiments of the present invention.

  The BMCs of the plurality of power storage devices 83 perform power management of the computer systems 82 and the power storage devices 3 in an environment where they are individually connected to the computer systems 82 in the network group.

  In the modification shown in FIG. 15, a plurality of computer systems 82 can simultaneously use the stored power from the power storage devices 83 installed individually. Therefore, the total amount of power that can be temporarily used in the network group can be significantly increased. As a result, the number of computer systems 82 that increase the Capping value in the network group can be increased, and the Capping value of a specific computer system can be significantly increased.

  Moreover, as shown in FIG. 16, it is also possible to sequentially switch the computer system 82 that uses the stored power. FIG. 16 shows that the supply of stored power to C1, C2, C3, and Cn is performed at different times. The solid line indicates the time during which any of the computer systems 82 is using the stored power. A broken line indicates a time during which the power storage device 83 is charged.

  In the sequence of FIG. 16, the power storage device 83 not using the stored power can repeat the power storage while the other computer systems in the network group use the stored power. For this reason, it is possible to extend the usage time of the stored power in the network group.

  Also in the above modification, power control of Examples 1 to 5 is possible. However, the power control method of the present invention is not limited to the embodiments and examples given here.

  Note that the management system according to the embodiment of the present invention is not necessarily a special device, and the function of the management system may be assigned to any computer system. The power storage device according to the embodiment of the present invention may be a power storage device built in a computer system.

  In the present embodiment, the power control method for the network group provided with the computer system has been described. However, the method of the present embodiment is not limited to the computer system, and is also used for power control of electric equipment using the power storage device. Can be applied.

  As described above, by using the embodiment of the present invention, it is possible to increase the total amount of power that can be temporarily used without changing the value of the maximum usable power amount in the network group. Therefore, even when a temporary increase in power consumption occurs in the network group, the computer system can be automatically controlled.

DESCRIPTION OF SYMBOLS 1 Management system 2 Computer system 3 Power storage device 4 Commercial power supply 10 Network 12, 13, 26, 31 Storage part 11, 25, 32 BMC
27 Power measurement unit 28 Power control unit 33 Power storage amount measurement unit 34 Storage battery 40, 41 Power control information management table 50 Priority information management table 60 Power control information table 70 Power storage information table 80 Network 81 Management system 82 Computer system 83 Power storage device 84 Commercial power supply

Claims (10)

Multiple computer systems;
A management system for managing power data of the plurality of computer systems,
The first computer system included in the plurality of computer systems transmits a request notification requesting to change its upper limit used power value according to its own used power amount to the management system,
The management system determines whether or not the upper limit used power value of the first computer system can be changed in response to the request notification. If the upper limit used power value can be changed, the upper limit used power value is determined. A change permission notice permitting the change to be sent to the first computer system;
The network control power system according to claim 1, wherein the first computer system changes the upper limit use power value in response to the change permission notice. Furthermore, it is possible to supply power to the plurality of computer systems, and includes a power storage device managed by the management system,
When the management system determines that the total power usage amount of the plurality of computer systems exceeds the maximum usable power amount set in the network group by changing the upper limit power usage value of the first computer system, Transmitting a switching instruction to switch the power supply to the second computer system having the minimum power consumption among the plurality of computer systems to the stored power, to the power storage device,
2. The network group power control system according to claim 1, wherein the power storage device switches power supply to the second computer system in response to a switching instruction from the management system. 3.   The power management system according to claim 2, wherein the management system excludes the second computer system from the total power consumption.   The first computer system requests to change the upper limit power consumption value when the power consumption amount of the first computer system continues to exceed a threshold set by a specific value smaller than the upper limit power consumption value for a specific time. The notification is transmitted to the management system, and the upper limit use power value and the threshold are updated according to a change permission notification from the management system. Power control system.   The first computer system, when its own power consumption continues to fall below a specific threshold for a specific time, lowers its own upper limit power consumption value and notifies the execution notification for notifying the lowering of the upper limit power consumption value. The power control system according to any one of claims 1 to 4, wherein the power control system transmits to the management system. When the power storage device supplies power to the second computer system when the management system receives the implementation notification, the management system supplies power to the second computer system from stored power to a commercial power source. A commercial power supply switching instruction to switch to the power storage device,
6. The power control system according to claim 5, wherein the power storage device switches power supply to the second computer system from stored power to a commercial power source in response to the commercial power source switching instruction. When the amount of stored power of the power storage device falls below a specific usable threshold, the power storage device transmits a storage power use unavailability notification to the management system,
The management system transmits, to the power storage device, a permission notification that permits the power supply to the second computer system to be switched from stored power to commercial power in response to the unusable notification,
6. The power storage device according to claim 1, wherein in response to the permission notification, the power supply to the second computer system is switched from stored power to a commercial power source, and charging is started. Power control system as described in. The management system includes:
Having priority data ranking the plurality of computer systems according to power consumption;
When the computer system included in the plurality of computer systems has transmitted a notification requesting the change of the upper limit used power value to the management system, but the power storage device is unusable,
The right to use stored power preferentially when the power storage device becomes usable is given to the computer system according to the priority data. The power control system described. A management device for managing power data of a plurality of computer systems,
Receiving from the first computer system included in the plurality of computer systems a request notification for requesting a change in the upper limit used power value according to the used power amount;
In response to the request notification, it is determined whether or not the upper limit used power value of the first computer system can be changed. If the upper limit used power value can be changed, the change of the upper limit used power value is permitted. Sending a change permission notice to the first computer system;
Management device for power control. Power of a network group connected to a management system in which a plurality of computer systems capable of supplying power from a power storage device controls the total power consumption of the plurality of computer systems to be equal to or less than a maximum usable power amount via a network A control method,
Changing the upper limit used power value according to the used power amount of the first computer system included in the plurality of computer systems,
Switching power supply to a second computer system included in the plurality of computer systems from commercial power supply to stored power,
Power control method.

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