JP2004096972A - Method of automatically stopping and controlling uninterruptible power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine whether or not work for a load is finished, and to avoid the occurrence of a failure that is caused by the interruption of supplied electric power by measuring a load capacity prior to the stop of an uninterruptible power supply device. <P>SOLUTION: The load that receives electric power from the uninterruptible power supply device transmits to the power supply device a signal that the work for the load is finished after the lapse of a prescribed time. After the lapse of the prescribed time, the power supply device measures the load capacity. When the measured value is less than a low load set value, the power supply is stopped immediately or after the lapse of a certain time. When the measured value is equal to or larger than the set value, the operation of the power supply device is continued, and the power supply is stopped when the measured load capacity is less than the low load set value or after the lapse of the certain time from that point. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic uninterruptible power supply control method that can stop an uninterruptible power supply that supplies power to a load when a load operation is completed after a predetermined time has elapsed.
[0002]
[Prior art]
Loads that should not be interrupted even for a very short time include, for example, servers and control devices. These loads generally receive power from an uninterruptible power supply instead of a commercial power supply, thereby avoiding a failure due to a power outage. Therefore, the content of the present invention will be described below by taking an example in which the uninterruptible power supply supplies power to the server.
[0003]
When the server is stopped after completing the work on that day and the scheduled operation is resumed the next morning, the uninterruptible power supply as its power source is also stopped after the server is stopped. For this purpose, the server performs a data evacuation process prior to the stop, so that there is no problem if the power to the server is cut off, that is, a server power-off standby state. When the server enters the power-off standby state, the uninterruptible power supply can be stopped. Therefore, before starting the data evacuation processing, the server sends a signal indicating that it is safe to stop the uninterruptible power supply after a predetermined time has elapsed, that is, an uninterruptible power supply stop delay time signal. Issued to the uninterruptible power supply, and the server performs the data saving process within the predetermined time period. Therefore, when the uninterruptible power supply stops after the predetermined time has elapsed, the data saving has been completed.
[0004]
FIG. 2 is a flowchart showing a conventional example in which the uninterruptible power supply is controlled to stop automatically. In the flowchart of FIG. 2, a predetermined time until the uninterruptible power supply stops is set in advance (process 11). If the predetermined time has elapsed (decision 15) since the uninterruptible power supply stop delay time signal was issued (process 12), decision 16 determines that the server is in a power-off standby state, and stops the uninterruptible power supply. An instruction (process 13) is issued, and the power to the server is cut off.
[0005]
[Problems to be solved by the invention]
By the way, after the server issues an uninterruptible power supply stop delay signal at a certain time to the uninterruptible power supply as its power supply, the data evacuation processing is performed due to a sudden increase in data to be processed. To do so, you may need more time than expected. However, since the server has already issued the stop delay time signal to the uninterruptible power supply, after the predetermined time has elapsed, the server is inactive regardless of whether the data evacuation processing has been completed. Since the power failure power supply device stops and the power supply is automatically cut off, data may be destroyed if the data saving process is not completed at the time when the predetermined time has elapsed.
[0006]
Therefore, an object of the present invention is to determine whether or not the load operation has been completed by measuring the load amount before stopping the uninterruptible power supply, and to avoid the occurrence of a problem due to interruption of the supplied power.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an automatic stop control method for an uninterruptible power supply according to the present invention includes:
If the load receiving the power supply from the uninterruptible power supply sends a signal to the uninterruptible power supply that the work of the load ends after a predetermined time elapses to the uninterruptible power supply, the uninterruptible power supply The power supply device measures the load amount, and if the value is lower than the low load set value, the uninterruptible power supply is stopped immediately or after the lapse of the predetermined time, but the measured load amount is equal to the low load set value. If the above is the case, the operation of the uninterruptible power supply is continued, and the uninterruptible power supply is stopped when the measured load amount falls below the low load set value or after the lapse of the predetermined time from this point.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a flowchart showing the operation of the embodiment of the present invention. Since the flowchart of this embodiment has a configuration in which a process 21, a judgment 22, and a judgment 23 are added to the flowchart of the conventional example described in FIG. Only the portion described above will be described, and description of the same portion will be omitted.
[0009]
In the flowchart of FIG. 1, when a predetermined time has elapsed (decision 15) from the issuance of the uninterruptible power supply stop delay time signal (processing 12), the present invention measures the amount of electricity output from the uninterruptible power supply to the server (processing 21). ). Here, the electric quantity may be any of the effective power, the apparent power, and the current, and may be an absolute value or a percentage value thereof.
[0010]
There is a large difference between the power consumed by the server during its operation and the power consumed after the data saving process is completed. The present invention pays attention to this point, and sets a value slightly higher than the power consumption of the server after the data evacuation processing as a low load set value, and measures the output electricity amount of the uninterruptible power supply after the predetermined time has elapsed. If the value is equal to or less than the low load set value (decision 22), it is determined that the data evacuation process has been completed, and after the confirmation time has elapsed (decision 23), the uninterruptible power supply is stopped (processing 22). 13) However, this confirmation time can be omitted.
[0011]
If the measured value of the amount of output electricity of the uninterruptible power supply has not decreased to the low load set value (decision 22), it is determined that the data saving process is still being performed, and the measured value of the amount of output electricity is low. Until the load drops below the set value, the uninterruptible power supply is not stopped.
[0012]
【The invention's effect】
Conventionally, an uninterruptible power supply that supplies power to a server or the like as a load receives a stop delay signal from the server that may stop power supply after a predetermined time has elapsed. After the lapse of time, the uninterruptible power supply is stopped without considering the operation state of the server. Therefore, if the data saving process is not completed, there is a possibility that inconvenience such as data destruction may occur. On the other hand, according to the present invention, when a predetermined time elapses after receiving the stop delay time signal from the server, the output electricity amount of the uninterruptible power supply is measured, and the value must be reduced to the low load set value. For example, if the server determines that the server is still operating and continues to operate the uninterruptible power supply, and the output power drops below the low-load set value, the server determines that the data evacuation process has been completed and determines that Stop the power failure power supply. Therefore, an effect is obtained that a power failure occurs in a state where the data saving process of the server is not completed and the data is destroyed.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an operation of an embodiment of the present invention. FIG. 2 is a flowchart showing a conventional example in which an uninterruptible power supply is controlled to stop automatically.
11-13 Process 15, 16 Decision 21 Process 22, 23 Decision

Claims (1)

If the load receiving the power supply from the uninterruptible power supply sends a signal to the uninterruptible power supply that the work of the load ends after a predetermined time elapses, the uninterruptible power supply operates for the predetermined time. After the elapse or after the elapse of a time obtained by adding a certain time to the predetermined time, in the automatic stop control method of the uninterruptible power supply for stopping the uninterruptible power supply,
The load defines a low load set value lower than the operating load amount,
After the elapse of the predetermined time, measure the load amount of the uninterruptible power supply,
If the load amount is less than the low load set value, stop the uninterruptible power supply immediately or after the elapse of the predetermined time,
If the measured load is equal to or greater than the low load set value, the operation of the uninterruptible power supply is continued,
An uninterruptible power supply automatic stop control method, wherein the uninterruptible power supply is stopped when the measured load falls below the low load set value or after the fixed time has elapsed from this point.

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