JPH08249059A - Monitor system - Google Patents

Abstract

PURPOSE: To simultaneously monitor each power apparatus and a power failure occurring in the power system which supplies power to each power apparatus. CONSTITUTION: The system is provided with a normality/abnormality discrimination means which discriminates the normalcy or abnormality of each power apparatus based on each status signal inputted with a certain period, a power failure possibility discrimination means 11 which discriminates that there is a possibility of the occurrence of a power failure in the case that it is judged that a prescribed number of or more power apparatus are abnormal in the same period, and a power failure possibility discrimination result transmission means 12 which transmits the power failure possibility discrimination result of this means 11 to a host device are added to each local controller. Power failure occurrence discrimination means 22 and 23 which discriminate the occurrence of a power failure in the power system based on the power failure possibility discrimination result received from each local controller 1 is added to the host device 2 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system for monitoring and controlling each power equipment incorporated in various factories and various facilities, and particularly monitoring a power failure occurring in a power system for supplying power to each power equipment at the same time. Monitoring system.

[0002]

2. Description of the Related Art As a method for detecting a power failure that occurs in a power system, an undervoltage detector is generally installed in a power supply path of the power system. This undervoltage detection device operates when the voltage on the power system drops below a certain value.

This undervoltage detecting device is installed only in the power receiving system and the high voltage transmitting system because of the cost and other restrictions associated with the installation of the undervoltage detecting device. Then, it is generally not installed in a low-voltage power system such as the above-described power equipment.

Therefore, a monitoring system for monitoring and controlling each power equipment driven by a low voltage incorporated in various factories and various facilities takes in the power failure detection result of the undervoltage detection device, and detects a power failure, It was used to control or monitor the power receiving system and high-voltage transmission system during a power failure.

[0005]

However, the monitoring system in which the power failure occurrence information is obtained from the undervoltage detecting device as described above still has the following problems. In a monitoring system that monitors and controls the operation of each power device, various status signals are input from each power device. Therefore, when a power failure occurs in the power system, the power equipment and the like all stop at the same time. As a result, a large amount of stop signals from each power device are instantaneously input to the monitoring system.
Therefore, in the monitoring system, a large number of stop messages having the same meaning are started to be printed, and the processing load of the monitoring system is significantly increased.

In order to eliminate such inconvenience, it is conceivable to prohibit printing of redundant unnecessary power failure messages when a power failure occurs. However, as described above, the undervoltage detection device detects a power failure. This method is used because the power equipment stop operation is faster than the power failure detection timing of this undervoltage detection device, and the power failure occurrence information is input after the printing of unnecessary power failure message is started in the normal undervoltage detection device. Can not.

Therefore, the unnecessary power failure message printing is restricted by using a high speed power failure detection device which detects a voltage drop at a high speed. However, since this high-speed power outage detection device is expensive, installing this high-speed power outage detection device for each power system causes a problem that the manufacturing cost of the power system increases significantly.

Further, in the undervoltage detection device, there is a case where it is not possible to detect an instantaneous power failure with a power failure period of about several hundred seconds depending on the detection method. However, when such a momentary power failure occurs, the power equipment often stops, so that unnecessary power failure message printing is started.

The present invention has been made in view of the above circumstances, and determines the possibility of a power outage based on the status signals of a plurality of electric power devices, thereby quickly generating a power outage with a small equipment cost. It is an object to provide a monitoring system that can detect.

[0010]

The present invention provides a plurality of local controllers for monitoring and controlling the respective power equipments based on the respective status signals input from the plurality of power equipments at a constant cycle, and a plurality of local controllers. The present invention is applied to a monitoring system including a host device that monitors information on each power equipment.

In order to solve the above problems, in the invention of claim 1, the normal / abnormal state of each power device is judged based on each state signal input to each local controller at a constant cycle.・ Abnormality determination means and a power outage possibility determination means that determines that a power outage may occur when it is determined that a specified number of power devices are abnormal in the same cycle, and a power outage possibility determination result of the power outage possibility determination means Power failure possibility determination result transmitting means for transmitting to the host device. Further, a power failure occurrence judging means for judging occurrence of a power failure in the power system based on each power failure possibility judgment result received from each local controller is added to the host device.

According to the second aspect of the present invention, the signal value judging means for judging whether or not the signal value of each state signal input to each local controller in a constant cycle is out of the specified range, and within the same cycle. When it is determined that the signal value more than the specified number is out of the specified range, the power failure possibility determination means that determines that a power failure may occur and the power failure possibility determination result of this power failure possibility determination means are transmitted to the host device. A power failure possibility determination result transmitting means is added. Further, a power failure occurrence judging means for judging occurrence of a power failure in the power system based on each power failure possibility judgment result received from each local controller is added to the host device.

In the third aspect of the present invention, the signal value of each state signal input to each local controller in a constant cycle is equal to or more than the specified value and the signal value of the same state signal input in the immediately preceding cycle. A signal value determining means for determining whether or not the power supply has been separated, and a power failure possibility determining means for determining that a power failure may occur when it is determined that more than a specified number of signal values are separated by a predetermined value or more in the same cycle; The power failure possibility determination result transmitting means for transmitting the power failure possibility determination result of the possibility determining means to the host device is added. Further, to the host device, a power failure occurrence judging means for judging occurrence of a power failure in the power system based on each power failure possibility judgment result received from each local controller is added.

Further, in the invention of claim 4, a power failure possibility judging means for judging the possibility of power failure on the basis of each status signal inputted in a constant cycle to each local controller, and the possibility of power failure judgment. A power failure possibility determination result transmitting means for transmitting the power failure possibility determination result of the means to the host device is added. Further, a low-voltage system power failure determination means for determining to the host device a power failure for each low-voltage power system to which the power equipment of each local controller belongs based on each power failure possibility determination result received from each local controller And a high voltage that determines the occurrence of a power failure in the high voltage power system that supplies power to each low voltage power system, based on the power failure occurrence determination result for each low voltage power system determined by the low voltage system power failure determination means. A system power failure determination means is added.

[0015]

In the monitoring system thus configured, each local controller monitors and controls each power equipment under its control based on each status signal output from each of the plurality of power equipment. The greatest feature of the present invention is that the possibility of a power failure occurring in each power device under its control is determined based on the statistical amount of each status signal output from each power device. Then, the occurrence of a power outage in the power system is determined based on each power outage possibility determination result from each local controller.

In this way, the occurrence of a power failure is determined based on the statistical amount of each status signal output from each power equipment. Generally, when a power failure occurs, each status signal changes rapidly. Not all changes in the status signal are caused by a power failure, but if the status signals of each power device change all at once, it can be determined that a power failure is likely to occur.

Therefore, the timing at which the host device determines the occurrence of a power outage in the power system based on the result of each power outage determination from each local controller is earlier than the power outage detection timing of the normal undervoltage detection device.

Further, in the invention of claim 1, when it is determined in each local controller that a prescribed number or more of power devices are abnormal in the same cycle, it is determined that a power failure may occur.

According to the second aspect of the present invention, in each local controller, when there is a prescribed number or more of signal values exceeding the prescribed number within the same period, the power failure may occur. Making a decision.

Further, in the third aspect of the present invention, in each local controller, the signal value of each state signal input in a constant cycle is equal to or greater than the signal value of the same state signal input in the immediately preceding cycle. When the number of distant signals exceeds the specified number, it is determined that a power failure may occur.

Further, in the official announcement of claim 4, in the host device, it is judged that a power failure has occurred in each low-voltage power system to which the power equipment of each local controller belongs, and the power is supplied to each low-voltage power system. The occurrence of a power failure in the supplied high-voltage power system is determined.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of the monitoring system of the embodiment. A plurality of local controllers 1 and one host device 2 are connected to a LAN transmission line 4.

A plurality of status signals such as an operation signal, a failure signal, and a measurement signal are input to each local controller 1 from each power equipment 3 under its control. Each status signal input to the local controller 1 is input to the power failure determination processing unit 11 via the signal input processing unit 10.

In the power outage determination condition table 13, as shown in FIG. 2, for each state signal Cn of each power equipment 3, is the determination type of power outage or abnormality determined by the contact state (a =
0), the condition a of whether the judgment is made based on the signal value (a = 1), and whether the contact is open when there is a change (b = 0) or when the contact is open is a change (b = 1) ) Or condition b
And a threshold value (specified value, specified range) d for determining that the signal value is abnormal is stored.

The power failure determination processing unit 11 determines the possibility of power failure for each status signal based on the information in the power failure determination condition table 13. The data transmission unit 12 transmits the power failure occurrence possibility determination result E to the host device 2 via the transmission path 4.

In the host device 2, the data receiving section 21
Receives the power failure occurrence possibility determination result E transmitted from each local controller 1. Partial power failure writing table 2
As shown in FIG. 3, an area in which the power failure possibility determination result E is written is formed in each of the numbers Ln of the local controllers 1. The data receiving unit 21 writes the received power failure occurrence possibility determination result E in the area of the local controller number Ln of the partial power failure writing table 24.

Further, in the power failure system determination table 25,
As shown in FIG. 4, for each system number Pn of each power system, the number Ln of each local controller 1 belonging to the corresponding power system is stored.

Then, the partial power outage determination unit 22 determines the power outage possibility determination result E for each local controller written in the partial power outage writing table 24 and each power system registered in the power outage system determination table 25. The power failure is determined for each power system based on the information of the local controller 1 to which the power controller belongs.

Further, in the power failure notification table 26, as shown in FIG. 5, an area for writing the power failure state F for each power system number Pn of each power system is formed. In particular,
All local controllers that compose the relevant power system 1
Has no power failure (F = 0), some local controllers 1 have power failure (F = 1), and all local controllers 1 have power failure (F)
= 2) and so on.

Further, in the power failure notification table 26,
An area for writing the power failure state G for all power systems (all power systems) is formed. That is, no power failure has occurred in all power systems (G = 0), a power failure has occurred in some power systems (G = 1), and a power failure has occurred in all power systems ( G = 2) and so on.

Then, the partial power outage determination unit 22 writes the above-described power outage determination result for each power system in the power outage notification table 26. Further, the next power outage determination processing unit 23 checks the power outage determination result for each power system in the power outage notification table 26, and if all the power systems are out of power, the power outage notification table 26 Write to that effect in the power outage area.

Next, a power failure detection operation in the monitoring system thus configured will be described with reference to a flow chart. Figure 6
3 is a flowchart showing the operation of each local controller 1.

When the flow chart is started, first, in ST (step) 1, the operation signal of the power equipment 3 is read. next,
The failure signal and the measurement signal are read (ST2). Next, the judgment condition is extracted from the power failure judgment condition table 13 (ST
3), the judgment type of the Cn-th status signal is checked (ST4).

When the judgment type is the contact state (a = 0),
When the contact determination direction is checked (ST5) and the contact state is open (device stopped state) (b = 0), it is determined whether the input is stopped in the current cycle or the input in the previous cycle. (ST6). If it is a stop in the current cycle, it is determined that a power failure may occur, and a power failure counter (not shown) is counted up (ST7).

On the other hand, in ST5, when the contact determination direction is closed (failure signal ON) (b = 1), it is determined whether the input in the current cycle has failed or the input in the previous cycle has failed. (ST8). Then, if a failure occurs in this cycle, the power failure counter is counted up with the possibility of power failure occurring (ST9).

In ST4, if the judgment type of the Cn-th state signal is the measured value (a = 1), it is judged whether the measured value input in ST10 is the abnormal judgment value (d), If it is an abnormal value, it is determined that a power failure may occur and the power failure counter is counted up (ST11a).

Next, in ST11, it is checked whether or not all the state signals input in the current cycle have been judged, and if all the judgments have been made, the power failure counted up as a possibility of power failure is counted up. Check the count value of the counter (S
T12). If the count value is equal to or greater than the predetermined value, it is determined that there is a possibility of power failure in the region of each power device 3 controlled by the local controller 1 (ST1
3) The power failure possibility determination result E is notified to the host device 2 (ST14).

Therefore, the host device 2 receives the power failure possibility determination result E of E = 0 or E = 1 from each local controller 1. FIG. 7 is a flowchart showing the operation of the host device 2.

When the flow chart is started and the power failure occurrence possibility judgment result E from each local controller 1 is received, the local controller 1 of the partial power failure each inclusion table 24 is received.
Write to the area (T11).

Next, the power failure occurrence probability determination results E of all the local controllers 1 belonging to one power system Pn in the power failure system determination table 25 are read from the partial power failure writing table 24 (T12).

Then, the power failure possibility determination result E of each local controller 1 belonging to the same power system Pn is checked. When all the local controllers 1 indicate that a power failure may occur (E = 1), the total power failure F = 2 is set in the area of the corresponding power system number Pn in the power failure notification table 26 (T13, T14).

If some of the local controllers 1 indicate that a power failure may occur (E = 1), a partial power failure F
Write = 1. When the determination processing of the power failure state F for all the power systems is completed (T15), the power failure notification table 26
Check the power failure information F for all power systems in.
Then, when all the power systems have total power failure F = 2, the power failure state for all the power systems is set to total power failure G = 2 (T1
7). In addition, in the case of total power outage F = 2 for some power systems,
Part 1 power failure G = 1 is set.

When the host device 2 sets the power failure state for all power systems to total power failure G = 2, the high voltage power system that supplies power to each power system (low voltage power system) fails. To determine.

In the monitoring system configured as described above, the possibility of power failure occurring in each power equipment 3 under its control is determined based on the statistical amount of each status signal output from each power equipment 3. ing. Then, the occurrence of a power failure in each power system Pn is determined based on each power failure possibility determination result E from each local controller 1.

Each local controller 1 in the host device 2
The timing of determining the power failure occurrence F of the power system based on each power failure occurrence possibility determination result E from is earlier than the normal power failure detection timing of the undervoltage detector.

Therefore, since it is not necessary to install an expensive high-speed power failure detection device for each power system in order to detect a power failure at a high speed, the manufacturing cost of the power system can be reduced. Furthermore, as the determination of the possibility of a power failure in each local controller, the optimal method can be selected from a plurality of methods as described above according to the signal type (signal number Cn) of each status signal. This monitoring system can be applied to the power device 3 that outputs a different status signal.

Further, in the host device, it is judged whether a power failure has occurred in each low-voltage power system to which the power equipment of each local controller 1 belongs, and at the same time, in the high-voltage power system which supplies power to each low-voltage power system. The occurrence of a power failure can be determined at the same time.

[0048]

As described above, in the monitoring system of the present invention, the possibility of power failure occurring in each power equipment under its control is based on the statistical amount of each status signal output from each power equipment. Deciding. Then, the occurrence of a power outage in the power system is determined based on each power outage possibility determination result from each local controller. Therefore, it is possible to quickly detect the occurrence of a power failure with a small equipment cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a monitoring system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a power failure determination condition table incorporated in the system of the embodiment.

FIG. 3 is a diagram showing a partial power failure writing table incorporated in the system of the embodiment.

FIG. 4 is a diagram showing a power failure system determination table incorporated in the system of the embodiment.

FIG. 5 is a diagram showing a power failure notification table incorporated in the system of the embodiment.

FIG. 6 is a flowchart showing the operation of each local controller of the system of the embodiment.

FIG. 7 is a flowchart showing the operation of the host device of the system of the embodiment.

[Explanation of Codes] 1 ... Local controller, 2 ... Host device, 3 ... Power equipment, 4 ... Transmission path, 11 ... Signal input section, 12 ... Power failure determination section, 13 ... Power failure determination condition table, 21 ... Data receiving section, 22 ... Partial power failure determination unit, 23 ... Total power failure determination unit, 24
... Partial power failure writing table, 25 ... Power failure system determination table, 26 ... Power failure notification table

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display part H04Q 9/00 311 7531-3H G05B 15/02 Z

Claims (4)

[Claims] 1. A plurality of local controllers that monitor and control each power device based on each state signal input from a plurality of power devices at a constant cycle, and monitor information of each power device obtained from each local controller. In the monitoring system including a host device, the local controller includes normality / abnormality determining means for determining normality / abnormality of each power device based on each state signal input in the constant cycle, and the same cycle. When more than the specified number of power devices are determined to be abnormal, the power failure possibility determining means that determines that a power failure may occur, and the power failure possibility determination result of this power failure possibility determining means are transmitted to the host device. A power failure possibility determination result transmitting means, wherein the host device is configured to perform a power failure possibility determination result based on each power failure possibility determination result received from each of the local controllers. And a power failure occurrence judging means for judging occurrence of a power failure in the power system. 2. A plurality of local controllers that monitor and control each power device based on each state signal input from a plurality of power devices at a constant cycle, and monitor information of each power device obtained from each local controller. In the monitoring system including the host device, the local controller includes a signal value determining unit that determines whether or not a signal value of each state signal input in the constant cycle is out of a specified range, When it is determined that the signal value more than the specified number is out of the specified range, the power failure possibility determining means that determines that a power failure may occur, and the power failure possibility determination result of the power failure possibility determining means to the host device. A power failure possibility determination result transmitting means for transmitting the power failure possibility determination result, and the host device based on each power failure possibility determination result received from each local controller. A monitoring system comprising a power failure occurrence judging means for judging occurrence of a power failure in the power system based on the above. 3. A plurality of local controllers that monitor and control each of the power devices based on each status signal input from the plurality of power devices at a constant cycle, and monitor information of each power device obtained from each of the local controllers. In each of the local controllers, the signal value of each status signal input in the constant cycle is separated from the signal value of the same status signal input in the immediately preceding cycle by a predetermined value or more. A signal value determining means for determining whether or not there is a power failure possibility determining means for determining that a power failure may occur when it is determined that a predetermined number or more of signal values are separated by a predetermined value or more in the same cycle; A power failure possibility determination result transmitting means for transmitting the power failure possibility determination result of the power failure possibility determining means to the host device, wherein the host device is A monitoring system having a power failure occurrence judging means for judging occurrence of a power failure in the power system based on each power failure possibility judgment result received from the controller. 4. A plurality of local controllers that monitor and control each of the power devices based on each state signal input from the plurality of power devices at a constant cycle, and monitor information of each power device obtained from each of the local controllers. In the monitoring system including the host device, each of the local controllers determines a power failure possibility based on each status signal input in the constant cycle, and a power failure possibility determining means, and the power failure possibility determining means. Power failure possibility determination result transmitting means for transmitting a power failure possibility determination result to the host device, the host device, the power of each local controller based on each power failure possibility determination result received from each local controller A low-voltage system power failure determination means for determining the occurrence of a power failure for each low-voltage power system to which the device belongs, and this low-voltage system High-voltage system power failure determination means for determining power failure occurrence in the high-voltage power system that supplies power to each low-voltage power system, based on the power failure occurrence determination result for each low-voltage power system determined by the power failure determination means And a monitoring system.