JP2010218192A - Apparatus and method for monitoring and controlling equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an equipment monitoring and controlling apparatus for evaluating the reliability of an input signal to an equipment monitoring and controlling apparatus, the controller being simply configured to eliminate multiplexing of an input part. <P>SOLUTION: An equipment monitoring and controlling apparatus body 2 includes: an input means for accepting the input of a first input signal and a second input signal to be output from monitoring control target equipment 1; a control arithmetic means 6 for performing prescribed arithmetic processing based on the first input signal, and for outputting a command signal for controlling monitoring control target equipment; and a signal evaluation means 7 for calculating calculation data corresponding to the value of a state shown by the first input signal by a prescribed calculation formula from the value of the second input signal, and for evaluating the reliability of the first input signal by comparing the value of the first input signal with the value of the calculation data. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an equipment monitoring control device and an equipment monitoring control method.

  In a conventional equipment monitoring and control apparatus, two systems of an active system and a standby system that receive an input of a detection signal (input signal) that is data indicating the operation status of the control target device output from the detection unit of the control target device are provided. An operating unit and a standby system that output to the control target device an operation signal (command signal) for performing a control operation of the control target device based on a detection signal input to the input unit; When there is an abnormality in the active system input unit or the active system output unit, switch the input unit or output unit to be used to the standby system input unit or standby system output unit, respectively. One that continues monitoring and control is known (for example, see Patent Document 1).

When controlling the equipment to be controlled according to the equipment status signal, if the abnormal data is taken in due to the abnormality of the detection circuit of the signal, the monitoring control apparatus may malfunction. For this reason, in the conventional equipment monitoring apparatus, as shown in Patent Document 1, two systems of an operating system and a standby system are provided as an input unit to be duplexed, and when an abnormality occurs in the operating system, the system quickly waits. By switching to the system, stable control can be continued.
Here, the input data abnormality detection is performed by comparing the data input from the active system with the data input from the standby system to determine whether or not they match to determine whether the data is normal data. The method of doing is generally known.
Even in a monitoring control device that does not switch between the active system and the standby system, in order to detect an abnormality in input data for the purpose of improving the reliability of the monitoring control operation, a plurality of input signals indicating the equipment state are different. A method of determining a normal value by taking in a signal input unit having a detector and comparing data obtained from different detectors with each other is generally performed conventionally.

Japanese Patent Laid-Open No. 02-189639

  However, in the conventional equipment monitoring and control apparatus including the one disclosed in Patent Document 1, in order to evaluate the reliability of the input signal, the input of the active system and the standby system is performed with respect to a certain input signal. Since it is necessary to provide a plurality of parts that take in the input signal, such as a part and a plurality of different detectors, and to make the circuit redundant, compared to the case where only one part that takes in the input signal is provided, The problem is that the configuration is complicated and the costs for production, installation, maintenance, etc. are increased, and the physical size of the device itself is large, which requires a lot of space for installation and installation. There is.

  The present invention has been made to solve such a problem, and does not require multiplexing of the input unit, has a simple configuration, and can perform reliability evaluation of an input signal to the equipment monitoring control device. A facility monitoring control device that can be obtained is obtained.

  The facility monitoring control device according to the present invention is a facility monitoring control device that monitors and controls the operation of the monitoring control target facility, and includes a first input signal and a second input output from the monitoring control target facility. An input unit that receives a signal input, and a control operation that performs a predetermined arithmetic processing based on the first input signal input to the input unit and outputs a command signal for controlling the equipment to be monitored and controlled And calculation data corresponding to the value of the state represented by the first input signal by a predetermined calculation formula from the value of the second input signal input to the input means and the first input signal And a value of the calculation data, and a signal evaluation means for evaluating the reliability of the first input signal to compare with the value of the calculation data.

  The facility monitoring control method according to the present invention is a method for monitoring and controlling the operation of the monitoring control target equipment by the equipment monitoring control device main body, wherein the equipment monitoring control device main body is connected to the monitoring control target equipment. The step of receiving the input of the first input signal and the second input signal to be output, and the equipment monitoring control device main body, based on the value of the second input signal, by a predetermined calculation formula, Calculating the calculation data corresponding to the value of the state to be represented, and the facility monitoring control device body compares the value of the first input signal with the value of the calculation data to compare the value of the first input signal. When the reliability of the first input signal is evaluated as a step of evaluating the reliability, the facility monitoring and control device body is configured to monitor the facility to be monitored and controlled based on the first input signal. And a step of outputting a command signal.

The equipment monitoring and control apparatus according to the present invention does not require multiplexing of input units, has a simple configuration, and has an effect that the reliability of the input signal to the equipment monitoring and control apparatus can be evaluated.
Also, the facility monitoring control method according to the present invention has the same effect.

It is a block diagram which shows the whole structure of the equipment monitoring control apparatus main body which concerns on Embodiment 1 of this invention, and its target equipment. It is a flowchart which shows operation | movement of the installation monitoring control apparatus main body which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
1 and 2 relate to Embodiment 1 of the present invention. FIG. 1 is a block diagram showing the overall configuration of the equipment monitoring control device main body and its target equipment, and FIG. 2 shows the operation of the equipment monitoring control device main body. FIG.
In the figure, reference numeral 1 denotes a monitoring control target facility to be monitored and controlled. The monitoring control target facility 1 is operated under the monitoring and control of the facility monitoring control device main body 2. And between the equipment monitoring control apparatus main body 2 which performs monitoring and control of this monitoring control object equipment 1 and the monitoring control object equipment 1 which is the object, one or more equipment status signals 3 are transmitted via communication means. It is being exchanged.

The equipment status signal 3 is output from the monitoring control target equipment 1 and input to the equipment monitoring control apparatus main body 2, and output from the equipment monitoring control apparatus main body 2 and input to the monitoring control target equipment 1. The command signal is largely divided into two.
The input signal indicates whether the monitoring / control target facility 1 is started / stopped, the monitoring / control target facility 1 related equipment is started / stopped, whether the output from the monitoring / control target facility 1 exceeds a certain threshold, etc. There are some possible values such as the digital input signal 3a representing the state relating to the monitoring control target equipment 1 that can take two states, the output from the monitoring control target equipment 1 and the output from the related equipment of the monitoring control target equipment 1 to some extent. They are classified into analog input signals 3b representing states relating to the monitoring control target equipment 1 distributed continuously.
The command signal is a command signal 3c for instructing start / stop of the monitoring control target equipment 1 and start / stop of related equipment of the monitoring control target equipment 1.

  The equipment monitoring control device main body 2 is connected to a communication means, and a signal input / output means 4 for inputting / outputting equipment status signals 3, a signal conversion means 5 for performing predetermined conversion on the equipment status signals 3, and equipment status signals 3 Based on the value of the input signal, the control monitoring means 6 for calculating the command signal to be output to the monitoring control target equipment 1 by the equipment monitoring control device body 2 and the value of the input signal of the equipment status signal 3 Based on this, signal evaluation means 7 for evaluating the reliability of the input signal is provided.

The signal input / output unit 4 receives the digital input signal 3 a and the analog input signal 3 b from the monitoring control target facility 1, outputs them to the signal conversion unit 5, and converts the converted signal from the signal conversion unit 5. Is an interface for outputting a command signal 3c to the monitoring control target equipment 1.
Then, the signal conversion means 5 performs, for example, mutual conversion between the digital signal format and the analog signal format or mutual conversion between the parallel signal format and the serial signal format with respect to the equipment state signal 3 as necessary. It plays a role of converting the equipment state signal 3 into a signal format suitable for the exchange of signals between the equipment 1 and the equipment monitoring control device main body 2 and the internal processing of the signals in the equipment monitoring control device main body 2.

  The control calculation means 6 performs a predetermined calculation process based on the input signal converted by the signal conversion means 5 and outputs a command signal 3 c for controlling the monitoring control target equipment 1. More specifically, the value of the input signal is monitored, and when the value of the input signal satisfies a predetermined command output condition for performing some control operation on the monitored control target facility 1, the monitored control target facility The command signal 3c for performing the control operation on 1 is output.

In this type of equipment monitoring control apparatus, a plurality of input signals from the monitoring control target equipment 1 are generally inputted, and the control performed by the equipment monitoring control apparatus body 2 on the monitoring control target equipment 1 is generally performed. In general, there are a plurality of commands, and more particularly when the importance of the monitoring control target equipment 1 is high.
Here, for convenience of explanation, paying attention to one of the monitoring control processes performed by the equipment monitoring control apparatus main body 2, the control calculation means 6 outputs the command signal 3 c in this monitoring control process. The signal to be monitored is one signal among a plurality of input signals, and this signal is hereinafter referred to as a first input signal.

The signal evaluation means 7 performs reliability evaluation as to whether or not there is an abnormality in the first input signal, which is a target for the control calculation means 6 to monitor whether or not the command output condition is satisfied.
This reliability evaluation is performed as follows. That is, as described above, there are generally a plurality of input signals from the monitoring control target equipment 1, but among the states represented by the plurality of input signals, for example, the monitoring control target equipment 1 is a generator. In addition, there are those that can be derived from each other by a predetermined calculation formula from one to the other, such as the rotational speed of the rotor of the generator and the frequency of the electric power output from the generator.

  Now, the state represented by the first input signal among the plurality of input signals from the monitoring control target facility 1 is different from the first input signal that can be uniquely derived by a predetermined calculation formula. If there is an input signal, this is hereinafter referred to as a second input signal. In the example of the generator described above, the first input signal is an input signal representing the rotation speed of the rotor, and the second input signal is an input signal representing the frequency of the output power (or vice versa).

The signal evaluation means 7 obtains the first input signal and the second input signal from the signal conversion means 5, and represents the first input signal from the value of the second input signal by the predetermined calculation formula Calculation data corresponding to the value of (hereinafter simply referred to as calculation data) is calculated.
Then, the value of the first input signal is compared with the value of the calculation data, and when these values match within a predetermined error range, the value of the first input signal is a correct numerical value and abnormal. The reliability of the first input signal is evaluated by assuming that there is no signal. The reliability evaluation result of the first input data by the signal evaluation unit 7 is output to the control calculation unit 6.

In this embodiment, the facility monitoring control device main body operates according to a series of flows shown in FIG.
First, when an input is made from the monitoring control target equipment 1 to the signal input / output means 4 of the equipment monitoring control device main body 2 as a digital input signal 3a or an analog input signal 3b of the equipment status signal 3, the input signal is converted into the signal conversion means 5 The necessary conversion is performed and the data is taken into the equipment monitoring control device main body 2 (step S1).
Then, in the subsequent step S2, the control calculation means 6 acquires the first input signal from the signal conversion means 5 among the input signals fetched in step S1, and the value of the first input signal is the monitoring control target. Whether or not a predetermined command output condition for performing some control operation on the facility 1 is satisfied (here, for convenience of explanation, the command output condition is set such that the value of the first input signal is a predetermined command output value, for example) Confirm that it has become.

If it is confirmed in step S2 that the value of the first input signal is not the command output value (does not satisfy the command output condition), the process proceeds to step S7 and a series of steps are performed. The operation flow ends.
On the other hand, when it is confirmed in step S2 that the value of the first input signal has become the command output value (satisfying the command output condition), the process proceeds to step S3.

In step S3, the signal evaluation unit 7 obtains the second input signal from the signal conversion unit 5 among the input signals captured in step S1, and calculates the second input signal from the value of the second input signal according to the calculation formula. Calculation data corresponding to the value of the state represented by one input signal is calculated.
In step S4, the signal evaluation unit 7 acquires the first input signal from the signal conversion unit 5 among the input signals captured in step S1, and determines the value of the first input signal and the previous input signal. In step S3, a comparison is made with the value of the calculation data calculated from the second input signal.

  If it is determined in the comparison in step S4 that the value of the first input signal and the value of the calculation data match within the predetermined error range and can be regarded as being equal to each other, the process proceeds to step S5. Then, the signal evaluation means 7 notifies the control calculation means 6 that the first input signal is a correct value and can be regarded as not abnormal, and the control calculation means 6 having received this notification After outputting the command signal 3c for performing the control operation on the monitored control target equipment 1 based on the input signal 1, the operation flow reaches step S7, and the series of operations ends. Note that the command signal 3 c output from the control calculation means 6 is output from the signal input / output means 4 to the monitoring control target equipment 1 through signal format conversion in the signal conversion means 5.

  On the other hand, if it is determined in the comparison in step S4 that the value of the first input signal and the value of the calculation data do not match within the predetermined error range and cannot be regarded as being equal to each other, In S6, the signal evaluation means 7 notifies the control calculation means 6 that the first input signal has an incorrect value and can be regarded as abnormal, and the control calculation means that has received this notification After 6 performs the countermeasure processing at the time of abnormality of the equipment monitoring control apparatus main body 2, the operation flow reaches step S7, and the series of operations ends. Note that this abnormality countermeasure processing may be, for example, processing that prevents unnecessary signals from being output to the monitoring control target facility 1 or that the maintenance manager is notified of the occurrence of an abnormality.

Although one input / output means for inputting / outputting the equipment state signal is provided here, an input means for receiving input signals and an output means for outputting command signals may be provided separately.
In addition, for convenience, the first input signal and the second input signal and the predetermined calculation expression that can be derived from each other have been assumed to be one, but the first input signal and the second input signal have been described. There may be a plurality of signals and a predetermined calculation formula that can derive these signals from each other.

  In the equipment monitoring and control apparatus configured as described above, the first input signal and the second input signal output from the monitoring control target equipment are received by the input means, and the first input to the input means is received. Based on the input signal, the control calculation means performs a predetermined calculation process, outputs a command signal for controlling the equipment to be monitored and controlled, and the signal evaluation means inputs the second input signal input to the input means. The first input signal is calculated by calculating calculation data corresponding to the value of the state represented by the first input signal from the value of the first input signal by comparing the value of the first input signal with the value of the calculation data. By evaluating the reliability of the equipment, it is possible to make the equipment monitoring and control apparatus capable of evaluating the reliability of the input signal a simple configuration that does not require multiplexing of input units (means).

  Further, in the equipment monitoring control method as described above, the equipment monitoring control device main body receives the input of the first input signal and the second input signal output from the equipment to be monitored and controlled, and receives the second input signal. Calculation data corresponding to the value of the state represented by the first input signal is calculated from the value by a predetermined calculation formula, and the value of the first input signal is compared with the value of the first input signal and the value of the calculation data. When the reliability is evaluated and it is evaluated that the first input signal is reliable, the command signal is output to the monitoring control target equipment based on the first input signal, whereby the input unit (means) Therefore, it is possible to evaluate the reliability of the input signal by the equipment monitoring and control device having a simple configuration.

  Further, it is checked whether or not a predetermined command output condition is satisfied based on the input first input signal, and when it is confirmed that the command output condition is satisfied, the second input By calculating calculation data corresponding to the value of the state represented by the first input signal by a predetermined calculation formula from the signal value, only when the reliability evaluation of the first input signal is really necessary, By performing the calculation of reliability evaluation, it is possible to suppress unnecessary calculations and reduce the load on the equipment monitoring control device main body.

Embodiment 2. FIG.
In the first embodiment described above, the reliability is evaluated by using a plurality of related input signals that can be derived from each other by a calculation formula in one equipment monitoring and control apparatus main body, which will be described here. In the second embodiment, for example, a second input signal is exchanged between a plurality of equipment monitoring and control devices connected to be communicable with each other using, for example, a local area LAN or the like, and is captured by another equipment monitoring control device The reliability of the first input signal is evaluated using data calculated by applying a calculation formula to the input signal.

  That is, a plurality of (two for convenience of explanation here) equipment monitoring control device main bodies 2 having the same configuration as that of the equipment monitoring control device main body 2 of the first embodiment are connected to the local communication means such as the local LAN via the connection means. It is connected so that communication is possible. These equipment monitoring control device main bodies 2 are communicably connected to a common monitoring control target equipment 1, and each exchanges equipment status signals 3 with the monitoring control target equipment 1, whereby the monitoring control target equipment 1. Monitoring control is performed.

  Then, one equipment monitoring / control device main body 2 receives the second input signal that has passed through its own signal input / output means 4 and signal conversion means 5 via the connecting means and the local communication means. The other equipment monitoring control device main body 2 outputs the second input signal that has passed through its signal input / output means 4 and signal converting means 5 to the connecting means and the local communication means. To the signal evaluation means 7 of one equipment monitoring control device main body 2 via

The signal evaluation means 7 of one facility monitoring control device main body 2 is a state value represented by the first input signal by a predetermined formula from the value of the second input signal from the other facility monitoring control device main body 2. The calculation data corresponding to is calculated, and the value of the first input signal obtained through the signal input / output means 4 and the signal conversion means 5 of the one monitoring control target equipment 1 that is itself is compared with the value of the calculation data To evaluate the reliability of the first input signal. Conversely, the signal evaluation means 7 of the other equipment monitoring and control device main body 2 calculates the first input signal from the value of the second input signal from the one equipment monitoring and control device main body 2 according to the predetermined calculation formula. The calculation data corresponding to the value of the state to be expressed is calculated, and the value of the first input signal and the calculation data obtained through the signal input / output means 4 and the signal conversion means 5 of the other monitoring control target equipment 1 that is itself A comparison with the value is made to evaluate the reliability of the first input signal.
Other configurations are the same as those of the first embodiment as described above.

  Regarding the operation flow, focusing on one facility monitoring control device main body 2, in step S <b> 3 of FIG. 2, the signal evaluation means 7 of one facility monitoring control device main body 2 The second input signal is acquired from the signal conversion means 5 of the other equipment monitoring and control device main body 2 through the connecting means and the local communication means, and the other equipment monitoring and control device main body 2 is acquired. The calculation data corresponding to the value of the state represented by the first input signal is calculated from the value of the second input signal obtained from the above by the above formula.

Then, in the subsequent step S4, the signal evaluation means 7 of the one equipment monitoring and control device main body 2 uses the first input signal among the input signals taken in by the one equipment monitoring and control device main body 2 in step S1 as its own signal. Comparison between the value of the first input signal acquired from the conversion means 5 and the value of the calculation data calculated from the second input signal obtained from the other facility monitoring control device main body 2 in the previous step S3. I do.
That is, the first input signal is obtained from its own equipment monitoring and control device main body 2, and the second input signal is the signal input / output means 4 and signal conversion of the equipment monitoring and control device main body 2 different from itself. The reliability evaluation process of step S3 and step S4 is performed using what was obtained through the means 5. Other operations except this point are the same as those in the first embodiment.

  In this case, the equipment monitoring control apparatus that performs monitoring control of the equipment to be monitored and controlled based on the first input signal and evaluates the reliability of the first input signal uses the equipment monitoring control for the second input signal. Although the case where it acquires from the other equipment monitoring control apparatus which has the same structure as a control apparatus was demonstrated, the equipment monitoring control apparatus for acquiring this 2nd input signal is not necessarily equipment shown in Embodiment 1 of this application. It is not necessary to have the same configuration as the monitoring control device, and is a conventional facility monitoring system that can output the second input signal in a signal format that can be handled by the facility monitoring control device that performs reliability evaluation. Also good.

  In the first embodiment described above, the first input signal and the second input signal are processed by the common signal input / output means and signal conversion means, so that signal processing in the signal input / output means and signal conversion means is performed. Although it was difficult to detect an abnormality, in the equipment monitoring and control apparatus configured as described above, in addition to being able to achieve the same effects as those of the first embodiment, monitoring control is performed by the input means. The first input signal output from the target equipment is received, and based on the first input signal input to the input means, the control arithmetic means performs predetermined arithmetic processing to control the monitoring control target equipment. The signal evaluation means is provided with the second input signal separately from the equipment monitoring control device, and the monitoring control target equipment to be monitored is the same as that of the equipment monitoring control device. Set up After obtaining from the monitoring system, calculation data corresponding to the value of the state represented by the first input signal is calculated from the value of the second input signal by a predetermined calculation formula, and the value and calculation of the first input signal are calculated. The reliability of the first input signal is evaluated by comparing the data value.

  For this reason, the second input signal can be used without passing through the signal input means and the signal conversion means of the equipment monitoring control device, and the signal in the signal input means and the signal conversion means of the equipment monitoring control device. Processing abnormality can be detected, and more reliable monitoring control processing can be performed.

DESCRIPTION OF SYMBOLS 1 Monitoring control object equipment 2 Equipment monitoring control apparatus main body 3 Equipment status signal 3a Digital input signal 3b Analog input signal 3c Command signal 4 Signal input / output means 5 Signal conversion means 6 Control operation means 7 Signal evaluation means

Claims (4)

A facility monitoring and control device that monitors and controls the operation of the monitoring and control target equipment,
Input means for receiving inputs of a first input signal and a second input signal output from the supervisory control target facility;
Control arithmetic means for performing a predetermined arithmetic processing based on the first input signal input to the input means and outputting a command signal for controlling the monitoring control target equipment;
Calculation data corresponding to the value of the state represented by the first input signal is calculated from the value of the second input signal input to the input means by a predetermined calculation formula, and the value of the first input signal A facility monitoring control apparatus comprising: a facility monitoring control apparatus main body having signal evaluation means for evaluating the reliability of the first input signal by comparing the value of the calculation data. A facility monitoring and control device that monitors and controls the operation of the monitoring and control target equipment,
Input means for receiving an input of a first input signal output from the supervisory control target equipment;
Control arithmetic means for performing a predetermined arithmetic processing based on the first input signal input to the input means and outputting a command signal for controlling the monitoring control target equipment;
Calculation data corresponding to the value of the state represented by the first input signal is calculated from the value of the second input signal by a predetermined calculation formula, and the value of the first input signal is compared with the value of the calculation data And a signal evaluation means for evaluating the reliability of the first input signal, and a facility monitoring control device main body having
The said signal evaluation means is provided with the said 2nd input signal separately from the said equipment monitoring control apparatus, The said monitoring control object equipment made into the object of monitoring is the other equipment monitoring system same as the said equipment monitoring control apparatus Equipment monitoring and control device characterized by being obtained from A method for monitoring and controlling the operation of the monitoring and control target equipment by the equipment monitoring and control device body,
The facility monitoring and control device main body receiving a first input signal and a second input signal output from the monitoring and control target facility;
The facility monitoring control device main body calculates calculation data corresponding to the value of the state represented by the first input signal by a predetermined calculation formula from the value of the second input signal;
The facility monitoring control device main body evaluates the reliability of the first input signal by comparing the value of the first input signal and the value of the calculation data;
When it is evaluated that the first input signal is reliable, the facility monitoring control device main body outputs a command signal to the monitoring control target facility based on the first input signal; A facility monitoring control method characterized by comprising: The facility monitoring control device main body further comprises a step of confirming whether or not a predetermined command output condition is satisfied based on the input first input signal,
When it is confirmed that the command output condition is satisfied, the equipment monitoring control device main body corresponds to the value of the state represented by the first input signal by a predetermined calculation formula from the value of the second input signal. The facility monitoring control method according to claim 3, wherein calculation data to be calculated is calculated.

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