JP2010204902A - Uninterruptible power supply, power feeding control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate construction of a redundant uninterruptible power supply system. <P>SOLUTION: A UPS 11-1, which supplies power output from, for example, an AC power source 16-1 as a first power source to a server apparatus 12 as a load apparatus for performing predetermined shutdown processing based on a predetermined shutdown instruction, detects a stop of power output from, for example, the AC power source 16-1 as the first power source, determines whether a condition of the shutdown instruction is met on the basis of a power state of the AC power source 16-1 by the detection result and power states of AC power sources 16-2 to 16-N as second power sources from other UPSs 11, and if determined that the condition of the shutdown instruction is met, notifies the server apparatus 12 as the load apparatus of the shutdown instruction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an uninterruptible power supply, a power supply control method, and a program.

  The uninterruptible power supply supplies power to the load equipment when the supply of commercial power is stopped due to a power outage or overload. When a power failure occurs, the uninterruptible power supply performs battery operation and then notifies the load equipment connected to itself of a shutdown instruction. To do. The load device to which the shutdown instruction has been notified performs shutdown processing immediately thereafter.

  In recent years, a redundant uninterruptible power supply system including a plurality of uninterruptible power supplies has been developed, and a technique for performing communication between the plurality of uninterruptible power supplies and load devices via a network has also been proposed ( Patent Document 1).

JP 2007-241827 A

  However, when communication between a plurality of uninterruptible power supply units and a load device in a redundant uninterruptible power supply system is performed via a network, the load device side usually has a predetermined value for data communication with the uninterruptible power supply unit. You need to install a software program. As a result, the introduction of a redundant uninterruptible power supply system may be costly and troublesome.

  In addition, when the load device is a server for a specific application such as an appliance server, there are cases where it is not preferable to install another application in order to avoid a risk of failure of the server. Further, for example, a server that stores a program in a flash memory medium and does not have a large-capacity recording medium such as an HDD may have no room for installing other applications due to physical configuration. For such load devices, there are cases where a redundant uninterruptible power supply system cannot be used using network communication.

  The present invention makes it possible to easily and appropriately construct a redundant uninterruptible power supply system.

  An uninterruptible power supply according to an aspect of the present invention is an uninterruptible power supply that supplies power output from a first power source to a load device that performs a predetermined shutdown process based on a predetermined shutdown instruction. A communication means that communicates with another uninterruptible power supply device that communicates with a device via a network and supplies power output from the second power source to the load device, and power from the first power source Based on the detection means for detecting the stop of output, the power state of the first power source based on the detection result by the detection means, and the power state of the second power source from another uninterruptible power supply, the conditions for the shutdown instruction are established A determination unit that determines whether or not a shutdown instruction condition is satisfied by the determination unit and a predetermined shutdown instruction is loaded via the communication unit And having a shutdown instruction means for notifying vessel.

  A power supply control method according to an aspect of the present invention is a power supply control method for an uninterruptible power supply that supplies power output from a first power source to a load device that performs a predetermined shutdown process based on a predetermined shutdown instruction. A communication step of communicating with the load device via the network and communicating with another uninterruptible power supply that supplies power output from the second power source to the load device, and the first power source A shutdown instruction based on a detection step for detecting stoppage of power output from the power source, a power state of the first power source based on a detection result in the detection step, and a power state of the second power source from another uninterruptible power supply A determination step for determining whether or not a condition for the shutdown is satisfied, and when it is determined in the determination step that a condition for a shutdown instruction is satisfied, the process in the communication step is performed. To, characterized in that it comprises a shutdown instruction notifying predetermined shutdown instruction to the load device.

  A program according to one aspect of the present invention is a program that causes a computer to execute a power supply control process for supplying power output from a first power source to a load device that performs a predetermined shutdown process based on a predetermined shutdown instruction. A communication step of communicating via a network with another uninterruptible power supply that communicates with a load device via a network and supplies power output from the second power source to the load device; A shutdown instruction based on a detection step for detecting a stop of the power output of the first power source, a power state of the first power source based on a detection result in the detection step, and a power state of the second power source from another uninterruptible power supply A determination step for determining whether or not the condition is satisfied, and communication when the determination step determines that the condition for the shutdown instruction is satisfied. Via treatment with step, characterized in that to execute the power supply control process including the shutdown instruction notifying predetermined shutdown instruction to the load device to the computer.

  In the uninterruptible power supply device, the power supply control method, or the program according to one aspect of the present invention, the load device communicates with the load device via the network and supplies the load device with the power output from the second power source. A detection step for communicating with a power failure power supply device via a network and detecting stoppage of power output from the first power supply, a power state of the first power supply based on a detection result in the detection step, and other uninterruptible power supply devices It is determined whether or not the condition for the shutdown instruction is satisfied based on the power state of the second power source from, and when it is determined that the condition for the shutdown instruction is satisfied, a predetermined shutdown instruction is notified to the load device. .

  According to the present invention, a redundant uninterruptible power supply system can be easily or appropriately constructed.

It is a block diagram which shows the structural example of the uninterruptible power supply system which concerns on embodiment of this invention. It is a block diagram which shows an example of a structure of UPS11 of FIG. It is a figure which shows the structural example of the shutdown sequence data at the time of a power failure memorize | stored in the memory 28 of UPS11. It is a block diagram which shows an example of a structure of the server apparatus 12 of FIG. It is a flowchart which shows the flow of a shutdown control process. It is a flowchart which shows the flow of a recovery process.

[Correspondence between the requirements of the present invention and the description]
Embodiments of the present invention will be described below, and the correspondence between the configuration requirements of the present invention and the embodiments described in the specification is illustrated based on the uninterruptible power supply device of one aspect of the present invention. It becomes as follows. This description is to confirm that the embodiment supporting the present invention is described in the specification. Accordingly, although there are embodiments that are described in the detailed description of the invention but are not described here as embodiments corresponding to the constituent elements of the present invention, It does not mean that the embodiment does not correspond to the configuration requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

The uninterruptible power supply according to one aspect of the present invention supplies a first power supply (for example, the alternating current of FIG. 1) to a load device (for example, the server apparatus 12 of FIG. 1) that performs a predetermined shutdown process based on a predetermined shutdown instruction. In an uninterruptible power supply (for example, UPS 11 in FIG. 1) that supplies power output from the power supply 16),
Other uninterruptible power supply apparatus that communicates with the load device via a network and supplies the load device with power output from a second power source that is the same as or different from the first power source, and Communication means (for example, the notification unit 26 and the UPS communication unit 29 in FIG. 2) that communicate via a network;
Detection means (for example, the input voltage detection unit 24, the power state detection unit 51 in FIG. 2) for detecting the stop of the power output from the first power source;
It is determined whether the condition for the shutdown instruction is satisfied based on the power state of the first power source based on the detection result by the detection unit and the power state of the second power source from the other uninterruptible power supply. Determination means (for example, the shutdown control unit 52 in FIG. 2 that performs the process of step S9 in FIG. 5);
When the determination means determines that the conditions for the shutdown instruction are satisfied, the shutdown instruction means for notifying the load device of the predetermined shutdown instruction via the communication means (for example, the process of step S16 in FIG. 5). And a shutdown control unit 52) of FIG.

[Description of configuration example of uninterruptible power supply system 1]
FIG. 1 is a diagram illustrating a configuration example of an uninterruptible power supply system 1 according to an embodiment of the present invention. The uninterruptible power supply system 1 includes N uninterruptible power supply apparatuses (hereinafter referred to as UPS: uninterruptable power supply) 11-1 to 11-N (hereinafter referred to as UPS11 when it is not necessary to distinguish them individually). The same applies to other cases), and includes a server device 12 as a load device and a network 13.

  The UPS 11-1 to UPS 11 -N are connected to the same or different AC power sources 16-1 to 16 -N, which are commercial power sources, for example, and the power output from the connected AC power source 16 is transmitted to the server device 12 or the network. 13 is supplied to the hub device 14 constituting the device 13.

  In this example, the UPS 11-1 is connected to the AC power supply 16-1 and supplies the power output from the AC power supply 16-1 to the server device 12 and the hub device 14 of the network 13. The UPSs 11-2 to 11-N are connected to the AC power sources 16-2 to 16-N, respectively, and supply the power output from the AC power sources 16-2 to 16-N to the server device 12.

  The network 13 includes a plurality of network cables 15 in addition to the hub device 14. The network cable 15 includes 100BASE-T. The plurality of network cables 15 connect between the hub device 14 and the server device 12 and between the hub device 14 and each UPS 11. When communication data is input from one network cable 15, the hub device 14 transfers the communication data to the remaining network cables 15.

  As described above, the uninterruptible power supply system 1 constitutes a redundant uninterruptible power supply system that can supply power to the server device 12 by a plurality of UPSs 11, and communication between the plurality of UPSs 11 and the server devices 12 is performed via the network 13. Has been done.

  When the uninterruptible power supply system 1 is configured by the UPS 11-1 to UPS 11-N and the server device 12, various information is set and registered in the devices by, for example, predetermined registration work.

  The registration of the UPS 11-1 to UPS 11-N and the server device 12 is performed by a terminal (not shown) temporarily connected to the network for setting work, for example, in which a predetermined setting tool is installed. Specifically, the setting tool is activated in the work terminal, and the UPS 11 to be set is entered on the setting tool. The setting tool establishes communication with the entered UPS 11 and collects and displays the setting information of each UPS 11.

  Next, information (node identification information (IP address, etc.), login information, shutdown execution command, shutdown timing) of the server device 12 to be shut down is set from the setting tool. In addition, a shutdown mode described later is set. After the setting is completed, the setting tool sets “information on all the entered UPSs 11”, “information on the server device 12 to be shut down”, and “shutdown mode” for each entered UPS 11. When the setting for each entered UPS 11 is successful, the setting is completed.

  Here, the case where the setting tool is executed by the work terminal has been described as an example, but the setting tool may be executed in the server device 12.

[Description of Configuration Example of UPS 11]
FIG. 2 is a block diagram illustrating an example of the configuration of the UPS 11.

  The UPS 11 includes a power supply unit 21, a first segment 22, a second segment 23, an input voltage detection unit 24, a power supply control unit 25, a notification unit 26, a timer 27, a memory 28, and a UPS communication unit 29. . Note that the notification unit 26, the UPS communication unit 29, and the like may be formed as option cards that can be inserted into and removed from the casing of the UPS 11.

  The power supply unit 21 includes, for example, a converter 41, an inverter 42, a first power supply switch 43, a second power supply switch 44, a battery 45, and a switch 46.

  A power cable 31 is connected to the converter 41. The power cable 31 is connected to the AC power supply 16 shown in FIG. Converter 41 generates predetermined DC power from the output power of AC power supply 16 supplied from power cable 31.

  An inverter 42 and a switch 46 are connected to the output side of the converter 41. A battery 45 is further connected to the switch 46.

  The inverter 42 converts the DC power output from the converter 41 or the DC power of the battery 45 supplied via the switch 46 into AC power that changes with substantially the same amplitude and frequency as the voltage of the AC power supply 16. The AC power generated by the inverter 42 is supplied to the first segment 22 through the first power supply switch 43 and is supplied to the second segment 23 through the second power supply switch 44.

  That is, power from the AC power supply 16 is supplied to the server device 12 by starting or stopping the converter 41 or the inverter 42, or by opening or closing the first power supply switch 43, the second power supply switch 44, or the switch 46 (hereinafter, as appropriate). The power from the battery 45 is supplied to the server device 12 (hereinafter referred to as “battery power supply” as appropriate).

  The first segment 22 and the second segment 23 each have a plurality of outlets 32. For example, a plug of one power cable 102 (FIG. 4) of the server device 12 is connected to the outlet 32 of the first segment 22 of the UPS 11-1 to which the server device 12 and the hub device 14 are connected, and the second segment. 23 is connected to a plug (not shown) of a power cable of the hub device 14.

  The input voltage detection unit 24 detects the voltage of the output power from the AC power supply 16 supplied to the converter 41 of the power supply unit 21 via the power cable 31, and outputs the detection result to the power supply control unit 25.

  The power supply control unit 25 includes a power state detection unit 51, a shutdown control unit 52, and a recovery control unit 53. When the voltage of the output power from the AC power supply 16 detected by the input voltage detection unit 24 becomes equal to or lower than a predetermined voltage for a predetermined time (hereinafter referred to as wink time), for example, the power state detection unit 51 Assuming that the power output from the AC power supply 15 is stopped, the shutdown control unit 52 and the recovery control unit 53 are notified of this (hereinafter referred to as power failure detection). The power state detection unit 51 also detects that the voltage of the output power from the AC power supply 16 detected by the input voltage detection unit 24 becomes equal to or higher than a predetermined voltage for a predetermined period after a power failure is detected. Assuming that the power supply has been restored, the restoration control unit 53 is notified of this (hereinafter referred to as restoration detection).

  When a power failure detection is notified from the power state detection unit 51, the shutdown control unit 52 executes predetermined shutdown control processing using data stored in the memory 28. Although details of this process will be described later, the server apparatus 12 is safely shut down by this process.

  When the power state detection unit 51 is notified of the power failure detection, the recovery control unit 53 performs a predetermined recovery control process based on the recovery detection notification from the power state detection unit 51 and the data stored in the memory 28. Execute. Although details of this process will be described later, the server apparatus 12 that has been shut down is quickly restarted by this process.

  The notification unit 26 generates various instructions and notifications based on the notification from the power supply control unit 25 and the data stored in the memory 28. The instructions generated by the notification unit 26 include, for example, a shutdown instruction and a start instruction. The notification generated by the notification unit 26 includes, for example, a power failure detection notification. The notification unit 26 supplies the generated instruction and notification to the UPS communication unit 29.

  The memory 28 stores a power failure shutdown sequence data 61, shutdown mode data 62, UPS address data 63, and load device address data 64.

  The shutdown sequence data 61 at the time of a power failure is composed of data shown in FIG. The wink time is a time used for power failure detection as described above. The countdown time is the time from when the power failure is detected until the server device 12 is notified of the shutdown instruction. That is, the countdown time corresponds to a waiting time until the shutdown is started, and is, for example, 5 minutes. If power is restored within the countdown time, no shutdown instruction is issued.

  The AP end waiting time is a time expected to be required for the end processing of the application program in the server device 12. The OS end waiting time is a time that is assumed to be required for the end processing of the operating system program in the server device 12. That is, the total time of the AP end waiting time and the OS end waiting time corresponds to the time required for the shutdown process in the server device 12 (hereinafter referred to as the shutdown time).

  The memory 28 stores a wink time value, a countdown time value, an AP end waiting time value, and an OS end waiting time value as the shutdown sequence data 61 upon power failure.

  Returning to FIG. 2, the shutdown mode data 62 is data defining the start conditions of the shutdown process of the server device 12. The shutdown mode includes a shutdown priority mode and a power feeding priority mode. The shutdown priority mode is a mode in which the server apparatus 12 is shut down when one UPS 11 out of the N UPSs 11 that supply power to the server apparatus 12 detects a power failure. The power supply priority mode is a mode in which the server apparatus 12 is shut down when all of the N UPSs 11 that supply power to the server apparatus 12 detect a power failure.

  In this example, the memory 28 stores a value corresponding to the shutdown priority mode and a value corresponding to the power feeding priority mode as the shutdown mode data 62. Note that the memory 28 may store, as the shutdown mode data 62, the value of the third mode for shutting down the server device 12 when, for example, two or more of the three or more UPSs 11 detect a power failure. it can.

  The UPS address data 63 is an address value of the UPS 11 other than itself. The UPS address is, for example, an IP (Internet Protocol) address of each UPS 11.

  In this example, the load device address data 64 is an address value of the server device 12. The load device address is, for example, the IP address of the server device 12.

  The data stored in the memory 28 is supplied by the registration work described above.

  In this example, the UPS communication unit 29 transmits the data generated by the notification unit 26 to another UPS 11 or the server device 12 using the Internet protocol, or is transmitted from another UPS 11 or the server device 12. Receive data. The UPS communication unit 29 includes a communication I / F 71, an IP unit 72, a TCP unit 73, and a UDP unit 74.

  A network cable 15 of the network 13 is connected to a communication I / F (Interface) 71. The communication I / F 71 has a MAC (Media Access Control) address. The MAC address is a number unique to the communication I / F 71.

  The IP unit 72 has an IP address. The IP address is a value corresponding to the scale of the network 13 such as class A, class B, or class C. The IP address is a unique value in the network 13. The IP unit 72 adds the transmission source (own) IP address and the transmission destination IP address to the data to be transmitted, and supplies the data to the communication I / F 71.

  A TCP (Transmission Control Protocol) unit 73 adds, for example, a number according to the transmission order to the data to be transmitted, and supplies the data to the IP unit 72. When the data received from the IP unit 72 is supplied, the TCP unit 73 confirms the number added to the data. Then, when the TCP unit 73 determines that, for example, a number skip (missing) has occurred by comparison with a plurality of numbers confirmed in the past, the TCP unit 73 generates a retransmission request for data to which the skip (missing) number is added, and the IP To the unit 72. The TCP unit 73 acquires data by the retransmission control without causing data loss.

  A UDP (User Datagram Protocol) unit 74 adds, for example, a number according to the order of transmission to data to be transmitted, and supplies the data to the IP unit 72. The UDP unit 74 acquires data received from the IP unit 72. Unlike the TCP unit 73, the UDP unit 74 does not request retransmission of data even if data loss occurs. That is, the UDP unit 74 does not receive the missing data.

  In this way, the UPS 11 is configured. The power supply control unit 25 of the UPS 11 is realized by a CPU (not shown) of the UPS 11 executing a predetermined application program. The application program is stored in the memory 28, for example. The application program stored in the memory 28 may be supplied to the user together with the UPS 11 or may be provided to the user separately from the UPS 11. When provided to the user separately from the UPS 11, the program is provided in a state stored in a computer-readable recording medium such as a CD-ROM, or is provided via a transmission medium such as the Internet. It may also be provided in other ways.

[Description of Configuration Example of Server Device 12]
FIG. 4 is a block diagram illustrating an example of the configuration of the server device 12.

  The server device 12 includes N power supply units 101-1 to 101-N. Plugs of power supply cables 102-1 to 102-N are connected to the power supply units 101-1 to 101-N, respectively. The plugs of the power cables 102-1 to 102-N are connected to the outlet of the UPS 11 segment. The power supply unit 101 converts AC power supplied from the UPS 11 supplied from each power cable 102 into DC power and supplies it to the server main body 103. Thereby, the power supplied to the server main body 103 is made redundant.

  The server main body 103 includes a display device 111, an input device 112, a communication I / F 113, an activation device 114, and a CPU (Central Processing Unit) 115. Each of the display device 111, the input device 112, the communication I / F 113, and the activation device 114 is connected to the CPU 115.

  The display device 111 displays an image based on the display data supplied from the CPU 115 on a display unit (not shown).

  The input device 112 has an operation unit (not shown) such as a keyboard and a pointing device. The input device 112 generates input data corresponding to the operation of the operation unit by the user, and supplies the input data to the CPU 115.

  A network cable 15 is connected to the communication I / F 113. The communication I / F 113 has a MAC address.

  The activation device 114 activates the CPU 115.

  The CPU 115 executes an operating system program and application program (not shown). When the CPU 115 executes the operating system program, the TCP unit 121, the UDP unit 122, and the IP unit 123 are realized. When the CPU 115 executes the operating system program, the stop control unit 124 that issues a predetermined shutdown command or activation command corresponding to the operating system program is realized.

  The TCP unit 121, the UDP unit 122, and the IP unit 123 perform basically the same processing as the TCP unit 73, the UDP unit 74, and the IP unit 72 (FIG. 2) of the UPS 11, and thus description thereof is omitted.

  The stop control unit 124 issues a shutdown command based on the shutdown instruction from the UPS 11 or issues a startup command according to the startup instruction from the UPS 11.

[Description of UPS 11 Shutdown Control Processing]
FIG. 5 is a flowchart showing the flow of the shutdown control process of the UPS 11. The shutdown control process of the UPS 11 will be described with reference to this flowchart. This process is started at a predetermined timing after the UPS 11 is turned on, for example.

  In step S1, the shutdown control unit 52 of the power supply control unit 25 determines whether or not a power failure has been detected. If it is determined that a power failure has been detected, the process proceeds to step S2.

  Specifically, when power failure detection is notified from the power state detection unit 51, it is determined that a power failure has been detected, and the process proceeds to step S2.

  In step S2, the shutdown control unit 52 controls the power supply unit 21 to start battery power supply to the load device. Specifically, the switch 46 connected to the battery 45 of the power supply unit 21 is changed from the open state to the closed state. Thereby, the battery 45 is connected to the inverter 42, and the inverter 42 converts the DC power stored in the battery 45 into AC power. The AC power generated by the inverter 42 is supplied to the load device. For example, in the case of the UPS 11-1, the UPS 11-1 is supplied to the server device 12 via the first power supply switch 43 and the outlet 32 of the first segment 22, and the hub is connected via the second power supply switch 44 and the outlet 32 of the second segment 23. Supplied to the device 14.

  Thus, by supplying power from the battery 45 when a power failure occurs, the server device 12 and the hub device 14 can operate even in a power failure state.

  In step S <b> 3, the shutdown control unit 52 starts measuring the countdown time based on the time information from the timer 27.

  Next, in step S4, the shutdown control unit 52 controls the notification unit 26 to notify the other UPS 11 of the power outage detection. Specifically, the notification unit 26 generates transmission data for notification of power failure detection, and supplies the generated transmission data for notification of power failure detection to the TCP unit 73 of the UPS communication unit 29. The TCP unit 73 adds a number according to the transmission order to the transmission data for notifying the detection of the power failure and supplies it to the IP unit 72. The IP unit 72 adds its own IP address and the IP address based on the UPS address data 63 stored in the memory 28 to the data supplied from the TCP unit 73 and supplies the data to the communication I / F 71. The communication I / F 71 sends the data supplied from the IP unit 72 to the network cable 15.

  The communication data sent to the network cable 15 is received by the hub device 14. The hub device 14 sends the received data to the other network cable 15. As a result, the data transmitted from the communication I / F 71 of the UPS 11 to the network cable 15 is transferred to the network cable 15 connected to another UPS 11.

  If it is determined in step S1 that no power failure has been detected, in step S5, the shutdown control unit 52 performs processing corresponding to step S4 in the other UPS 11 from the other UPS 11 via the UPS communication unit 29. In step S1, it is determined whether or not the power failure detection notified is received. If not, the process returns to step S1 and the subsequent processing is executed.

  If it is determined in step S5 that a notification of power failure detection from another UPS 11 has been received, the shutdown control unit 52 determines in step S6 the power state of the AC power supply 16 receiving power supply (that is, a power failure has occurred). And whether a power failure has occurred. Specifically, as in step S1, it is determined whether or not power failure detection has been notified from the power state detection unit 51. If it is determined that power failure detection has been notified, it is determined that a power failure has occurred. When the information to show is generated and it is determined that the power failure detection is not notified, the information indicating that the power failure has not occurred is generated. Hereinafter, this information generated here is referred to as power state information.

  Since a plurality of AC power supplies 16 may be out of power for a short time, the AC power supply 16 receiving power supply may be out of power during the processes of steps S1 and S5. In step S1, Even if it is determined that a power failure has not been detected, a power failure may be detected in the process of step S6.

  Next, in step S7, the shutdown control unit 52 controls the notification unit 26 to obtain power state information obtained by checking the power state in step S6 (that is, information indicating that a power failure has occurred, or a power failure). Information indicating that no occurrence has occurred) is transmitted to another UPS 11.

  When the power failure detection is notified to the other UPS 11 in step S4, or when the power status information is transmitted to the other UPS 11 in step S7, the UPS communication unit 29 is transmitted from the other UPS 11 in step S8. Receive incoming power status information.

  In the case of going through step S4, in step S8, the power state information is transmitted in the process of step S7 from the other UPS 11 that has received the notification of the power failure detection by the process of step S4. Received.

  For example, in the case where there are four UPS 11-1 to 11-4, the operation of the UPS 11-1 when the UPS 11-1 detects a power failure will be described as an example. Since the UPS 11-1 receives the notification, the power state information is transmitted in the process of step S 7 in the UPS 11-2, 11-3, 11-4. Receive power state information from.

  In the case of going through step S7, in step S8, the power status information is transmitted in the process of step S7 from the other UPS 11 that has received the notification of the power outage detection by the process of step S4 in the other UPS 11 that detected the power outage. Therefore, the power state information is received.

  For example, when there are four UPSs 11-1 to 11-4, the operation of the UPS 11-1 when the UPS 11-2 detects a power failure will be described as an example. Since the UPS 11-3 and 11-4 that have received the notification of the power failure detection by the process transmit the power status information in the process of step S7, the UPS 11-1 receives the power from the UPS 11-3 and 11-4. Receive status information. The UPS 11-1 generates its own power state information in steps S 6 and S 7 and transmits it to the other UPS 11.

  Next, in step S <b> 9, the shutdown control unit 52 determines whether or not a shutdown instruction condition (hereinafter referred to as a shutdown instruction condition) is satisfied based on its own power state and the power state of another UPS 11.

  Specifically, the shutdown control unit 52 determines whether the power state based on its own power state information or the power state based on the power state information of another UPS 11 satisfies the condition corresponding to the shutdown mode (that is, the shutdown instruction condition). Determine whether or not. Whether the shutdown mode is the shutdown priority control mode or the power feeding priority control mode is confirmed by referring to the shutdown mode data 62 stored in the memory 28.

  For example, when the shutdown mode is the shutdown priority control mode, it is determined that the shutdown instruction condition is satisfied when the power state information of at least one UPS 11 indicates that a power failure has occurred.

  In the power feeding priority control mode, when the power state information of all the UPSs 11 indicates that a power failure has occurred, it is determined that the shutdown instruction condition is satisfied.

  When it is determined in step S9 that the shutdown instruction condition is not satisfied, in step S10, the shutdown controller 52 reads the power failure shutdown sequence data 61 from the memory 28, and based on the time measurement started in step S3. Then, it is determined whether or not the countdown time indicated in the power failure shutdown sequence data 61 has elapsed. If it is determined that the countdown time has not elapsed, the process returns to step S8 and the subsequent processing is executed. The reason why the power state information is received from the other UPS 11 during the countdown time is in consideration of a delay in data communication depending on the communication state.

  When it is determined in step S9 that the shutdown instruction condition is satisfied, in step S11, the shutdown control unit 52 determines whether the UPS 11 is capable of issuing a shutdown instruction.

  When the process goes through step S7, that is, when a power failure is not detected by itself, it is determined that the UPS 11 is not capable of issuing a shutdown instruction. When the process goes through step S4, that is, when a power failure is detected, the determination differs depending on the shutdown mode.

  Specifically, in the shutdown priority control mode, it is sufficient that a power failure is detected in at least one UPS 11, so the UPS 11 that has detected the power failure can issue a shutdown instruction. That is, it is determined that the UPS 11 can issue a shutdown instruction.

  On the other hand, in the power feeding priority control mode, a power failure is detected in all UPSs 11. Therefore, in that case, it is necessary to determine which UPS 11 transmits the shutdown instruction. Here, it is assumed that the priority order for performing the shutdown instruction is determined based on, for example, the order of registration of the UPSs 11, and the highest-order UPS 11 in the priority order can perform the shutdown instruction. That is, when the priority is the highest, it is determined that the UPS 11 can issue a shutdown instruction.

  If it is determined in step S11 that the UPS 11 is capable of issuing a shutdown instruction, in step S12, the shutdown controller 52 determines whether or not the restoration controller 53 has notified that the AC power supply 16 has been restored, as will be described later. If it is determined that the notification has not been made, the process proceeds to step S13.

  In step S13, the shutdown controller 52 reads the power failure shutdown sequence data 61 from the memory 28, and whether or not the countdown time indicated in the power failure shutdown sequence data 61 has elapsed based on the time measurement started in step S3. If it is determined that it has not elapsed, the process returns to step S12 and the subsequent processing is executed.

  If it is determined in step S13 that the countdown time has elapsed, that is, if the AC power supply 16 has not been restored within the countdown time, the shutdown control unit 52 controls the notification unit 26 in step S14 to control the application program. Is sent to the server device 12.

  In step S15, the shutdown control unit 52 starts measuring the AP end waiting time based on the time information from the timer 27, and waits until the AP end waiting time elapses. That is, it waits until the end of the application program in the server device 12 is completed. Upon receiving the application program termination instruction, the stop control unit 124 of the server device 12 issues an termination command to the CPU 115. Based on this end command, the CPU 115 executes an end process for the application program being executed on the server device 12. Examples of application programs include a server program, a mail program, and a filter program. Data used by the application program is stored in a memory (not shown).

  When the AP end waiting time elapses in step S15, the shutdown control unit 52 controls the notification unit 26 to transmit a shutdown instruction to the server device 12 in step S16. In step S <b> 17, the shutdown control unit 52 starts measuring the OS end waiting time based on the time information from the timer 27 and waits until the OS end waiting time elapses. That is, it waits until the end of the operating system program in the server device 12 is completed. Upon receiving the shutdown instruction, the stop control unit 124 of the server device 12 issues a shutdown command to the CPU 115. The CPU 115 terminates the operating system program based on this shutdown command.

  For example, when the OS of the server apparatus 12 is Linux or Unix, the shutdown command set as standard in Linux or Unix is transmitted via the general-purpose standard protocol. 12 is transmitted. Further, when the OS of the server device 12 is Windows, it is transmitted to the server device 12 and executed via a general-purpose standard protocol. The method of sending instructions is not limited to this method.

  When an instruction is transmitted, a response is transmitted from the server device 12 that has received the instruction, so the UPS 11 receives it and transmits it to the other UPS 11. The other UPS 11 stops power supply to the server device 12 based on the received response from the server device 12.

  If it is determined in step S17 that the OS end waiting time has elapsed, battery power supply is stopped in step S18.

  Specifically, the switch 46 connected to the battery 45 of the power supply unit 21 is changed from the closed state to the open state. Thereby, the battery 45 is disconnected from the inverter 42. As a result, DC power is not supplied to the inverter 42, and the inverter 42 does not output AC power. Therefore, power supply from the UPS 11 to the server device 12 or the hub device 14 is completed, and the server device 12 and the hub device 14 are stopped. To do.

  When it is determined in step S10 that the countdown time has elapsed (that is, when the countdown time has elapsed without satisfying the shutdown instruction condition), or when it is determined in step S11 that the UPS 11 is not capable of issuing a shutdown instruction. In step S18, battery power supply is stopped.

  When the battery power supply is stopped in step S18, the process returns to step S1, and the subsequent processes are similarly performed. Even if a power failure is detected in step S1 and the subsequent processing is executed, the shutdown control processing is repeatedly executed as described above because the normal power supply state may be returned by the recovery processing described later.

  When it is notified in step S12 that the AC power supply 16 has been restored, in step S19, the shutdown control unit 52 controls the notification unit 26 to display power state information indicating that no power failure has occurred. The UPS 11 is notified. Thereafter, the process returns to step S1, and the subsequent processes are similarly executed.

As described above, based on the own power state and the power state of the other UPS 11, it is determined whether the shutdown instruction condition is satisfied,
When it is determined that the shutdown instruction condition is satisfied, the shutdown instruction is transmitted to the server device 12.
The server apparatus 12 can be shut down appropriately without causing the server apparatus 12 to install special software for exchanging with the plurality of UPSs 11.

  In the above description, the shutdown priority mode and the power feeding priority mode have been described as examples of the shutdown mode. However, other conditions may be used. Three or more modes or one mode can be set.

  In the above description, the instruction to end the operating system program is the shutdown instruction. However, both the application program and the operating system program can be ended with one shutdown instruction.

[Description of recovery processing]
FIG. 6 is a flowchart showing the flow of recovery processing of the UPS 11. The recovery process of the UPS 11 will be described with reference to this flowchart. This restoration process is started when the restoration control unit 53 is notified of a power failure detection from the power state detection unit 51. Therefore, it is executed in parallel with the above-described shutdown control process (except for the processes of steps S5, S6, and S7).

  In step S31, the recovery control unit 53 of the power supply control unit 25 determines whether or not recovery detection is notified from the power state detection unit 51, and determines that the recovery detection is notified (that is, AC to the power cable 31). When supply of output power from the power supply 16 is started), the process proceeds to step S32.

  In step S <b> 32, the recovery control unit 53 determines whether or not battery power feeding is being performed. When it is determined that battery power feeding is being performed, in step S <b> 33, the restoration control unit 53 controls the power feeding unit 21 to stop battery power feeding. Specifically, the switch 46 of the power supply unit 21 is changed from the closed state to the open state. Thereby, battery electric power feeding is complete | finished. When the stored power of the battery 45 is reduced and charging is necessary, the switch 46 of the power supply unit 21 is kept closed until the stored power of the battery 45 reaches a predetermined power, and then changed to the open state. You may make it do.

  The battery power supply starts in step S2 and stops in step S18 in the shutdown control process of FIG. That is, when the AC power supply 16 is restored during the processing from step S3 to step S17, it is determined in step S32 that battery power supply is being performed, and in step S33, battery power supply is stopped.

  Next, in step S34, the recovery control unit 53 reads the power failure shutdown sequence data 61 from the memory 28, and the countdown time indicated in the power failure shutdown sequence data 61 based on the time measurement result started in step S3 of FIG. In step S35, the shutdown control unit 52 is notified that the AC power supply 16 has been restored. Thereafter, the process ends.

  In the shutdown control process of FIG. 5, since the shutdown instruction or the like is transmitted to the server device 12 after the countdown time has elapsed (steps S12, S13, S14, S16), the AC power supply 16 is restored before the countdown time has elapsed. By notifying the shutdown controller 52 to that effect (step S12), since the shutdown instruction or the like is not transmitted (steps S14 and S16 are skipped), the server apparatus 12 is not shut down.

  On the other hand, when it is determined in step S34 that the countdown time has elapsed, in step S36, the recovery control unit 53 reads the shutdown sequence data 61 upon power failure from the memory 28, and based on the time information from the timer 27. Then, it waits until the total time of the AP end waiting time and the OS end waiting time (that is, the shutdown time) indicated in the shutdown sequence data 61 at the time of power failure elapses (that is, waits until the shutdown in the stop server device 12 is completed).

  In step S36, when the shutdown time has elapsed, in step S37, the recovery control unit 53 controls the notification unit 26 to notify the server apparatus 12 of a drive instruction. Specifically, the notification unit 26 transmits, for example, a startup command in the OS of the server apparatus 12 to the server apparatus 12 via a general-purpose standard protocol. The drive instruction of the server device 12 can be performed using, for example, Wake-on-LAN technology. It can also be done over a telephone line using Wake-on-Modem technology.

  When the stop control unit 124 of the server apparatus 12 receives the start instruction, it issues a start command to the start device 114. The activation device 114 activates the CPU 115 based on this activation command. The activation device 114 activates the CPU 115 after confirming that the data is data addressed to the server device 12 based on, for example, the MAC address added to the data acquired by the communication I / F 113. It may be.

  The CPU 115 activated by the activation device 114 first reads an operating system program from the memory 28 and executes it. Thereby, the server apparatus 12 implements the stop control unit 124, the TCP unit 121, the UDP unit 122, the IP unit 123, and the like shown in FIG. The server device 12 is restored to the state before the shutdown process.

  Before the shutdown time elapses, the server apparatus 12 may be in the process of terminating the application program or operating system program. Therefore, the server apparatus 12 can be safely restarted by starting the process after waiting for the termination. Can be made.

  When the shutdown control unit 52 is notified that the AC power supply 16 has been recovered in step S35, or when the activation instruction is notified to the server device 12 in step S37, the recovery process ends.

  Note that the restoration process is not limited to the example shown in FIG. 6, and the server apparatus 12 can be automatically started by the start of power supply.

  Note that the process whose flow is shown in FIG. 5 or FIG. 6 is not limited to the process in which each step is performed in time series in the order described, but is not necessarily performed in time series. It includes processes that are executed individually.

  DESCRIPTION OF SYMBOLS 1 Uninterruptible power supply system, 11 UPS, 12 Server apparatus, 13 Network, 14 Hub apparatus, 15 Network cable, 16 AC power supply, 21 Feeding unit, 22 1st segment, 23 2nd segment, 24 Input voltage detection part, 25 Feeding Control unit, 26 notification unit, 27 timer, 28 memory, 29 UPS communication unit, 51 power state detection unit, 52 shutdown control unit, 53 recovery control unit, 61 shutdown sequence data at power failure, 62 shutdown mode data, 63 UPS address data 64 Load device address data

Claims (3)

In an uninterruptible power supply that supplies power output from a first power source to a load device that performs predetermined shutdown processing based on a predetermined shutdown instruction,
Communicating with the load device via a network and communicating with another uninterruptible power supply for supplying power output from a second power source to the load device via the network;
Detecting means for detecting stoppage of power output from the first power source;
It is determined whether the condition for the shutdown instruction is satisfied based on the power state of the first power source based on the detection result by the detection unit and the power state of the second power source from the other uninterruptible power supply. Determination means to perform,
An uninterruptible power supply comprising: a shutdown instruction unit that notifies the load device of the predetermined shutdown instruction via the communication unit when the determination unit determines that the condition of the shutdown instruction is satisfied. apparatus. In a power supply control method for an uninterruptible power supply that supplies power output from a first power source to a load device that performs predetermined shutdown processing based on a predetermined shutdown instruction.
A communication step of communicating via the network with another uninterruptible power supply device that communicates with the load device via a network and supplies the load device with power output from a second power source;
A detection step of detecting a stop of power output from the first power source;
Whether or not the conditions for the shutdown instruction are satisfied based on the power state of the first power source based on the detection result in the detection step and the power state of the second power source from the other uninterruptible power supply A determination step for determining
A shutdown instruction step of notifying the load device of the predetermined shutdown instruction through the processing in the communication step when it is determined in the determination step that the condition of the shutdown instruction is satisfied. Power supply control method. A program that causes a computer to execute power supply control processing for supplying power output from a first power source to a load device that performs predetermined shutdown processing based on a predetermined shutdown instruction,
A communication step of communicating via the network with another uninterruptible power supply device that communicates with the load device via a network and supplies the load device with power output from a second power source;
A detection step of detecting a stop of power output from the first power source;
Whether or not the conditions for the shutdown instruction are satisfied based on the power state of the first power source based on the detection result in the detection step and the power state of the second power source from the other uninterruptible power supply A determination step for determining
When it is determined in the determination step that the condition for the shutdown instruction is satisfied, a power supply control process including: a shutdown instruction step for notifying the load device of the predetermined shutdown instruction through the process in the communication step. A program characterized by being executed.

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