JPH0783539B2 - Power control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power supply control method in a power supply system including a plurality of power supply devices, and more particularly to power supply ON / OFF control when a failure occurs.

(Prior Art) FIG. 2 is a configuration diagram of an example of a conventional power supply system.
In this figure, 1 is a master (control) power supply unit having system control authority, and 2 and 3 are slaves (controlled)
It is a power supply device. Each of the power supply devices 1 to 3 has an AC power supply line 4
It is connected to the. Further, as shown in the figure, each of the power supply devices 1 to 3 includes a power supply unit 1a, 2a, 3a, and failure occurrence detection means 1c, 2c, 3c and failure recovery means 1b, 2b, 3b. ing.

Next, the function of this power supply system will be described by taking as an example the case where the fault is an AC input drop abnormality.

The power supply unit 1a of the master power supply device 1 has an original function as a direct-current power supply such as supplying a direct-current output, and also has an on / off instruction (O / O) for the slave power supply devices 2 and 3.
OFF). Failure occurrence detection means 1c
Has a function of turning off the DC output of its own power supply unit 1a when it detects that the AC input has fallen below a certain value (touch value V1c). Further, the automatic recovery means 1b outputs the output of its own power supply unit 1a when the AC input rises and recovers to a constant value (touch value V1b) after the failure occurrence detection means 1c turns off the output of the power supply unit 1a. It has the function of turning on again. However, the impression value is V1
The condition is c <V1b.

On the other hand, the power supply units 2a and 3a of the slave power supply devices 2 and 3
Has a function of turning on / off the DC output of its own power supply unit 2a, 3a in accordance with a power on / off instruction from the master power supply device 1 in addition to its original function as a DC power supply such as supplying a DC output. have. Failure occurrence detection means
2c and 3c have the same function as the failure occurrence detecting means 1c, and have impression values V2c and V3c, respectively. Also, the automatic recovery means 2b and 3b are
It has the same function as the automatic recovery means 1b, and each has a moving value V2b (> V
2c), V3b (> 3c).

Next, ON operation and OFF operation of this power supply system will be described with reference to FIG.

When the power-on switch is pressed, the power supply of the master power supply device 1 is turned on, the master power supply device 1 starts the on sequence, and when the sequence ends, the master power supply device 1 enters the operating state as it is. The master power supply device 1 starts the on-sequence and, at the same time, issues a power-on instruction to the slave power supply devices 2 and 3. When the slave power supply devices 2 and 3 receive the power-on instruction, the slave power supply devices 2 and 3 each start an on-sequence, and when the sequence ends, the slave power-supply devices 2 and 3 are put into the operating state.

On the other hand, when the power-off switch is pressed, the master power supply device 1 starts the off sequence, and at the same time, issues a power-off instruction to the slave power supply devices 2 and 3. Receiving this power-off instruction, slave power supplies 2 and 3 are turned off.
The sequence starts and the power is turned off.

Next, the on / off operation of the power supply system when a failure occurs will be described with reference to FIG. 4, assuming that the AC input has abnormally dropped below the moving value of the failure detection means.

When the master power supply device 1 and the slave power supply devices 2 and 3 are operating in their respective operating states, the AC input level drops from, for example, 100 V to 80 V or less, and each failure occurrence detection unit detects a failure occurrence in the order of 2c and 1c, It is assumed that the failure occurrence detecting means 3C has not been detected. In this way, detection is not performed at the same time, or is not detected because there are variations in the performance characteristics of each component used in the failure occurrence detection means built in each power supply device, and the impression values V1c, V2c, This is because V3c is generally different.

Since the failure occurrence detecting means 2c is most sensitive to the decrease of the input level, the power supply of the slave power supply device 2 is turned off first, then the master power supply device 1 is turned off, and the slave power supply device 3 remains in the operating state. After that, when the AC input level is recovered and the recovery impression values V1b and V2b are reached, the power supplies are normally turned on again in the reverse order of the above, and the entire system returns to the operating state.

That is, in the conventional system, the power supply control method in which each power supply device self-manages the on / off operation at the time of occurrence of a failure such as a decrease in the AC input level has been adopted.

(Problems to be Solved by the Invention) However, in this conventional method, as shown in FIG. 4, for example, the self power supply is turned “off” due to a failure such as a decrease in AC input.
Since the master power supply device 1 cannot grasp the state of each power supply device as a result because it does not have a route to notify the other power supply device that it is in the state, it has the following problems.

Slave power supply while the device (A) that operates by receiving the DC output from the master power supply device 1 is operating and the device (B) that operates by receiving the DC output from the slave power supply device 2 is operating When the device 2 is turned off by the AC input drop abnormality first, the device (A) may access without knowing that the device (B) is not supplied with power.

Since the device (A) cannot grasp the recovery of the device (B) and is virtually out of control, there is no possibility of automatic recovery / continuation of operation once the AC input abnormal decrease occurs.

There were problems such as.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned problems of incomplete state management and impossible automatic recovery / continuation of operation, and to provide an economical and highly operable control system for a power supply system.

(Means for Solving the Problem) Means taken for solving the above-mentioned problem is to connect a plurality of slave power supply devices to a master power supply device,
In a power supply control method of a power supply system that can turn off or turn on its own power supply by the occurrence or elimination of a failure, a startup completion signal generating means for sending a power supply startup completion signal to a master power supply unit and a failure occurrence master The slave power supply device is provided with a failure occurrence signal generation means for sending out to the power supply device and a failure type signal generation means for sending out the kind of failure to the master power supply device, and the start-up completion signal of the power supply from all of the slave power supply devices. When a failure occurs in one of the slave power supply unit and the startup completion unit that completes the startup of the power supply by receiving the signal, the failure generation signal generation unit and the failure type signal of the slave power supply unit in which the failure has occurred. It turns off its own power supply based on the signal from the generation means and sends a power-off instruction to all slave power supply units in the on state. Then, by checking the fault type signal, it is detected that no fault has occurred in the slave power supply device and that the AC input level of the self power source is sufficient to guarantee the DC output, and the self power source is detected. The master power supply is equipped with a power on / off instruction means for turning on the power supply and issuing a power on instruction to all slave power supplies, and when a power supply system failure occurs, the power supply of the entire power supply system is turned off to eliminate the failure. After that, the entire power supply system is turned on again.

(Operation) According to the present invention, when a failure occurs in a certain slave power supply device, the slave power supply device uses the failure occurrence signal generation means and the failure type signal generation means to turn on the power of the master power supply device. / Informs the off instruction means and turns off its own power source. Then, the master power supply device turns off the power supply to the slave power supply device in the power-on state by the power-on / off instructing means and also turns off its own power supply. The slave power supply device that has received this power-off instruction turns off its own power supply.

On the other hand, when the failure type signal is examined and it is detected that no failure has occurred in the slave device and that the AC input level in the self power supply is sufficient to guarantee the DC output,
The master power supply unit starts power-on by its power-on / off instruction means, and at the same time issues a power-on instruction to all slave power supply units, and the master power supply unit waits for power-on of all slave power supply units. Becomes Then, the slave power supply device that receives this power-on instruction,
Upon completion of power-on, the power-up completion signal generation means sends a power-supply start-up completion signal to the master power supply apparatus start-up completion means. The start-up completion means completes the start-up of the power supply of the master power supply device upon receipt of the power-up completion signal from all the slave power supply devices, and completes the recovery operation of the power supply system.

(Example) Next, the Example of this invention is described with drawing.

FIG. 1 is a configuration diagram of a power supply system according to the present invention. In this figure, 11 is a master (control) power supply device having control right of the system, 12 and 13 are slave (controlled) power supply devices, and these power supply devices are respectively connected to the AC power supply line 4. There is.

The master power supply device 11 includes a power supply unit 11a, a failure automatic recovery means 11b, and a failure occurrence detection means 11c. The power supply unit 11a has an original function as a DC power supply such as supplying a DC output, and a slave power supply 12 and
In addition to a portion having a function of instructing 13 to turn on / off the power during normal operation, a means 11d for completing the start-up of its own power source
And a power on / off instruction means 11e when a failure occurs. The start-up completion means 11d receives and recognizes the power-up completion signal (hereinafter referred to as RDY) of each slave power supply device, and completes the start-up operation of its own power supply. Further, the power on / off instruction means 11e is a fault occurrence signal (hereinafter referred to as ALM) which is a fault occurrence related signal from each slave power supply device.
And receive and recognize the fault type signal (hereinafter referred to as PLOW),
Based on this, or based on a signal from the fault occurrence detection means 11c of the self power supply (master power supply), a power off instruction is issued to the slave power supply device, and the off sequence of the self power supply is also started. The master power supply 11 is, for example, PLOW
Based on this, set the recovery standard and start the automatic recovery of the system based on this. The functions of the automatic restoration means 11b and the failure occurrence detection means 11c of the master power supply device 11 are the same as those of the automatic restoration means 1b and the failure occurrence detection means 1c in the conventional system, respectively.

The slave power supply devices 12 and 13 have the same configuration.
Therefore, the slave power supply device 12 will be described. It includes a power supply unit 12a, a failure recovery means 2b, and a failure occurrence detection means 12c. The power supply unit 12a includes a start-up completion signal generation means 12d and a failure generation signal generation means 12e in addition to a portion having an original function as a DC power supply such as supplying a DC output. The start-up completion signal generation means 12d sends RDY to complete the start-up of its own power supply unit, and the failure occurrence signal generation means 12e masters the fact that some failure has occurred in its own power supply by sending ALM. Notify the power supply device 11. Failure occurrence detection means 12c
Is provided with, for example, a fault type signal generating means 12f in addition to a portion having a function of turning off its own power source when a fault occurs. The fault type signal generating means 12f sends PLOW to the master power supply device 11 when the fault occurrence detecting means 12c detects a fault (AC input abnormal decrease) in its own power source. In addition, recovery means
12b starts the recovery operation only when the master power supply device 11 gives a power-on instruction. Thus, in the power supply control system of the present invention, the system is turned on / off according to the control of the master power supply device 11 not only during normal operation but also during failure.

Next, the operation of the power supply system shown in FIG. 1 at the time of normal operation and at the time of failure occurrence will be described with reference to FIG.

When the master power supply 11 operates normally,
Power on slave power supplies 12, 13 at the same time
To the power-on sequence, and waits until the power-on sequence is completed until RDY is received from all slave power supplies. The slave power supply units 12 and 13 start up their own power supplies in accordance with this power-on instruction, and when the power-on sequence ends, send RDY to the master power supply unit 11. The master power supply 11, which was in the state when the startup of the slave power supplies was completed, is released from the waiting state when receiving RDY from all slave power supplies, and ends its power-on sequence. Startup is completed.

On the other hand, the operation when a failure occurs is as follows. even here,
As in the case of the conventional technology, the AC input abnormal decrease is taken as an example of the failure, and the slave power supply unit 12 is the most sensitive to this failure, followed by the master power supply unit 11 and the slave power supply unit 13 in this order. Will be described as an example when the value does not reach the moving value of the slave power supply device 13.

AC power drop is detected by failure occurrence detection means 12 of slave power supply unit 12
When c is detected, this is sent to the fault type signal generating means 12f by PLOW to the power on / off instruction means 11e of the master power supply device 11.
At the same time, the output of the power supply unit 12a is turned off. The power supply unit 12a sends the ALM from the fault occurrence signal generation means 12e to the power on / off instruction means 11e before turning off its own output. However, the ALM sending time should be long enough for the master power supply device 11 to confirm the occurrence of a failure, and the master power supply device 11 should complete the off sequence after the following power off instruction.

When the master power supply device 11 receives the ALM and PLOW, and knows the occurrence and cause of the failure, the master power supply device 11 turns off the output of its own power supply unit 11a by the power on / off instructing means 11e, and at the same time, causes each slave power supply device to turn off. Instruct to turn off the power. The slave power supply device 13, which has received the power-off instruction, turns off the output of the power supply unit 13a. As described above, in this embodiment, when any device in the power supply system detects a failure, the entire power supply system goes down (power failure).

In this way, after a certain period of time elapses after the system has been down due to the detection of AC input drop, the master power supply 11 eliminates the fault corresponding to PLOW from the slave power supply 12 in which the fault has occurred, and the AC input level of its own power supply is DC output. When the master power supply device 11 recognizes that the power supply is sufficient, the master power supply device 11 starts the on-sequence of its own power supply. Normally, the failures are resolved in the reverse order of occurrence, so in this case, it is considered that the master power supply apparatus 11 resolves the failure before the slave power supply apparatus 12. The master power supply device 11 starts its own on-sequence by the power supply on / off instruction means 11e, and at the same time issues a power-on instruction to each slave power supply device,
Waiting for completion of startup of all slave power supplies. The slave power supply units 12, 13 that received this power-on instruction
When it recognizes that the input level is sufficient to guarantee its own DC output, it starts each ON sequence, and when it ends, it outputs RDY from the start-up completion signal generating means 12d, 13d. In the case of this example, the system went down due to the detection of low AC input of the slave power supply unit 12, so the completion of the on sequence of the slave power supply unit 12 is
It is considered to be later than 13. Slave power supply 12 is AC
When recognizing that the input level is still insufficient, it does not start the O-sequence, and therefore does not send RDY, so that the master power supply device 11 remains waiting for RDY reception. Upon receiving RDY from all slave power supplies, the master power supply 11 ends the on-sequence and completes the automatic recovery operation of the power supply system.

FIG. 6 is an explanatory view showing the power failure and the automatic recovery operation from the power failure in the above-mentioned example by the same display method so that it can be compared with FIG. As shown in FIG. 6, the fourth
Unlike the case of the figure, due to the power failure of the slave power supply device 12, all the other power supply devices are also interrupted at substantially the same time, and the entire power supply system is automatically restored at the same time.

As described above, the power failure and the automatic recovery operation after that have been described by taking the case where the slave power supply device 12 first detects a decrease in the AC input as an example.However, depending on the system and the type of the failure, the master power supply device 11 may cause the failure first. May be detected. In this case, the master power supply device 11 does not supply a power-off instruction to the slave power supply device by PLOW or ALM, but instead of the self power supply and each slave power supply device based on a signal from the fault occurrence detection means 11c of its own. Instruct to turn off the power. The same applies to the point that the on-sequence of the master power supply 11 is completed and the automatic recovery operation of the power supply system is completed only after there is RDY from all the slave power supplies.

(Effects of the Invention) As described in detail above, according to the present invention, a startup completion signal generating means for sending a power supply startup completion signal to a master power supply device and a master power supply device that a failure has occurred. The slave power supply device is provided with a failure occurrence signal generation means for sending out and a failure type signal generation means for sending out the kind of failure to the master power supply device, and receives the power-on completion signal from all of the slave power supply devices. By means of startup completion means to complete the startup of the power supply,
If one of the slave power supplies fails,
Based on the signals from the fault occurrence signal generating means and the fault type signal generating means of the faulty slave power supply device, the self power supply is turned off and a power off instruction is issued to all the slave power supply devices in the on state, and thereafter, Checking the fault type signal, detecting that no fault has occurred in the slave power supply device and detecting that the AC input level in the self power source is sufficient to guarantee DC output and turning on the self power source By providing the master power supply with power-on / off instruction means for issuing a power-on instruction to the slave power supply, the master power supply is notified of the failure occurrence and its cause when the slave power supply fails. The slave power supply device, the master power supply device, and the other slave power supply devices in which the failure has occurred are turned off almost at the same time.

On the other hand, when the failure is resolved, the master power supply detects that there is no failure in itself and the slave power supply, turns on its own power, and at the same time issues a power-on instruction to all slave power supplies. The master power supply and all slave power supplies are turned on almost at the same time. Therefore, when a failure occurs, the entire power supply system can be turned off almost simultaneously, and when the failure is resolved, the entire power supply system can be turned on almost simultaneously.

As a result, it is possible to solve problems such as incomplete management of power-related status in a power supply system and a system composed of multiple other devices, and the inability to automatically recover and continue operation. The power system can be controlled.

Furthermore, the conventional system has automatic recovery means for the master and slave power supply devices, but in the present invention, the slave power supply device starts the recovery operation only when the master power supply device issues a power-on instruction. The automatic recovery means need only be installed in the master power supply device. as a result,
It is also effective in reducing the cost of the entire power supply system.

[Brief description of drawings]

FIG. 1 is a power supply system configuration diagram according to the present invention, FIG. 2 is a conventional power supply system configuration diagram, FIG. 3 is a power supply on / off operation explanatory diagram in a conventional power supply control system, and FIG.
FIG. 5 is an explanatory diagram of a power supply control system when an input drop is detected, FIG. 5 is an explanatory diagram of a power supply control system of the present invention, and FIG. 6 is an explanatory diagram of a power supply control system when an AC input drop is detected of the present invention. 11 …… Master power supply, 12,13 …… Slave power supply, ON / OFF …… Power on / off instruction, RDY …… Power up completion signal, PLOW …… Fault type signal, ALM …… Fault occurrence signal .

Claims (1)

[Claims] 1. A power supply control method of a power supply system in which a plurality of slave power supply devices are connected to a master power supply device, and each power supply device can turn off or turn on its own power supply depending on the occurrence or elimination of a failure, thereby completing the start-up of the power supply. Start-up completion signal generating means for sending a signal to the master power supply device, fault occurrence signal generating means for sending a failure occurrence to the master power supply device, and failure type signal generating means for sending a failure type to the master power supply device Is provided in the slave power supply device, and the start-up completion means for completing the start-up of the power supply by receiving the power-up completion signal from all of the slave power supply devices, and the failure of any of the slave power supply devices. If it happens,
Based on the signals from the fault occurrence signal generating means and the fault type signal generating means of the faulty slave power supply device, the self power supply is turned off and a power off instruction is issued to all the slave power supply devices in the on state, and thereafter, Checking the fault type signal, detecting that no fault has occurred in the slave power supply device and detecting that the AC input level in the self power source is sufficient to guarantee DC output and turning on the self power source The master power supply unit is provided with a power-on / off instruction means for issuing a power-on instruction to the slave power supply unit, and when the power supply system fails, the power supply of the entire power supply system is turned off. A power supply control method characterized by turning on the entire power supply.