JPH07312787A - Remote supervisory controller - Google Patents

Abstract

PURPOSE:To send state change data caused during timer operation with a transmission packet as designated regardless of the presence of the delay time of a system bus. CONSTITUTION:Status data of a supervisory object equipment 4 are fetched periodically by a DI circuit 51 and status data with time comprising the status data and time data of timepiece 52 are stored in a this time file 54. The status data and status data received in a preceding time are compared with each other and when any change is in existence, the status data with time data after the change are sent and stored in a preceding time data file 55 and a state change data buffer 61 as state change data. A transmission processing section 63 supervises the state change data in the state change data buffer 61 and edits the data into status change data for each group and stores the data to a data edit buffer 64 and grouped status change data are extracted from the data edit buffer 64 after the lapse of a setting time T of a timer started by the specific status change data and transmission data for each group are generated based on the time data of the status change data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to supervisory control for monitoring the operating conditions of substations, power plants, etc. at a control station, and in particular, clarifies the causal relationship of operations when a plurality of monitored devices operate simultaneously. Therefore, the present invention relates to a distant monitoring control device in which the status data of related devices are grouped and edited on the slave station side and monitored and displayed by the master station.

More specifically, a substation installed in a substation or a power plant that is geographically dispersed has an intelligence function so that the substation or the plant of the power plant or auxiliary equipment can be operated.
Involved in monitoring control of operating conditions such as stoppages, it monitors and controls the output status (hereinafter referred to as status data) of monitored devices that detect these operating conditions, especially when multiple monitored devices operate simultaneously. In order to clarify the causal relationship of the operation, from the state change data group in which the state data has changed, the state change data of equipment that is closely related to each other is classified and edited by the slave station and transmitted efficiently to the master station. By doing so, the load on the data processing function of the monitoring / display device of the master station is reduced and the transmission line is efficiently operated.

[0003]

2. Description of the Related Art FIG. 2 shows a functional block diagram of a distant monitoring control apparatus in the prior art. In FIG. 2, the distant monitoring control device includes a master station 1 installed in a control station, a slave station 2 installed in a substation or a power station, and a transmission line connecting the master station 1 and the slave station 2. 3 and the status data of the monitored device 4 at the substation or power plant is device a ... Device A, B,
After being detected by C, to Z, this state data is processed by the data processing function of the slave station side as a state-related data group having a close relation to each other, and then, via the transmission line 3, to the control station where the master station is located. It is transmitted and displayed on the monitoring and display device of the control station.

The slave station 2 is composed of a plurality of process input / output units 5A, a transmission unit 6A, and a system bus 7 as required. The process input / output unit 5A indicates the state of the monitored device 4. A DI circuit 51 that periodically fetches data, an input processing unit 53, and data that includes the device number of the monitored device 4 and the current state data (hereinafter, the state data with the device number is simply referred to as state data) are stored. This time data file 54A
And the comparison processing unit 56 that compares the state data captured in the file 54A this time with the relevant state data captured up to the previous time, and if there is a change as a result of comparison by this comparison processing unit, the changed state data And the previous file 55A that stores this state change data, and this state change data is transmitted to the transmission unit 6A.

The transmission unit 6A includes a state change data buffer 61A for temporarily storing the state change data and a state change data buffer 61A.
A transmission processing unit 63A that monitors the state change data of 61A and edits the state change data for each predetermined combination group, and a data editing buffer 64A that stores the state change data edited for each combination group, It is composed of a clock 62 that operates in synchronization with the clock of the master station 1 and a modem 65 that communicates with the master station via the transmission line 3. The transmission processing unit 63A has a timer that starts with specific state change data, and after this timer has elapsed the set time, extracts the state change data group edited for each group from the data editing buffer 64A and edits this group. The time data from the clock 62 is added to the created state change data to create transmission data, and the created transmission data is transmitted to the transmission line 3
To the master station 1 via.

In the above structure, the input processing section 53 periodically takes in the status data of the devices (a, A to Z) from the DI circuit 51 and sets the status data in the current data file 54A. The comparison processing unit 56 compares the status data of the current data file 54A with the corresponding status data up to the previous time (specifically, the status data stored in the previous data file 55A), and changes between the status data. If so, the corresponding device number. And the state change data consisting of the state data after the change are set in the state change data buffer 61A via the system bus 7,
At the same time, the state change data having a change between both state data is transferred from the current data file 54A to the previous data file 55A, and the state change data stored in the previous data file 55A is updated to the latest data.

FIG. 3 shows an example of group editing of status change data. (A) is an explanatory view for explaining the relationship between changes in the status data of monitored devices and examples of editing transmission data, and (B) is related to each other. FIG. 3 is a classification and edit combination diagram of deep devices. Figure 3 (A)
Indicates that the status data of the devices (a, b, A to C) of the monitored device 4 is device a at time t1, device B at time t2, device b at time t3, device A at time t4, and device C at time t5. Indicates that a change has occurred in the status data of. Also, in FIG. 3 (B), a combination of related devices at this time is indicated by a circle, and in the illustrated example,
(Device a and device A) and (device b and device B, device C) are grouped as devices closely related to each other.

A description will be given with reference to FIGS. 2 and 3. Transmission unit 6A
The transmission processing unit 63A monitors the state change data buffer 61A, and if the state change occurs in the device shown in FIG. 3B, the state change data is classified / edited / stored in the data edit buffer 64A. . When a specific state change data (device a in the illustrated example) is generated, a timer included in the transmission processing unit 63A is started, and the devices a, b, A, and
A state change occurs in the status data of B and C, (device a and device A)
And (the device b and the device B, the device C) are edited into the same packet, and the transmission data is transmitted to the master station 1 via the modem 65 and the transmission line 3.

[0009]

Generally speaking, when data is transmitted via the system bus, a transmission delay and variations thereof occur although there is a difference in time magnitude. FIG. 4 is an explanatory diagram for explaining the problem of the conventional technique and corresponds to the group editing example of the state change data of FIG. now,
When the times t5 and t6 are very close to each other and there is a relationship of t5 <t6, originally, as the transmission data 2, at the time t6.
The status change data of (device b and device B, device C) should be edited and transmitted in the same packet. However, due to the transmission delay time Δt, the state change data stored in the state change data buffer 61A is (t5 + Δt)> t6 as shown by the dotted line,
It may be delayed. In such a case, the state data of device C, which should have been sent in the same packet as the state data of (device b and device B) at time t6, is not transmitted, and the next packet at time t7 is sent. The inconvenience of being edited independently occurs.

The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems and to provide a status change data generated during the operation of a timer regardless of the presence or absence of a delay time of a system bus. Another object of the present invention is to provide a distant monitoring control device having a display processing function of state change data that is transmitted by a designated transmission packet.

[0011]

In order to achieve the above object, in the first invention, a master station installed in a control station and a slave station installed in a controlled station such as a substation or a power station. When,
In a remote monitoring control device that includes a transmission line connecting between a master station and a slave station and monitors and controls a monitored device of a controlled station such as a substation or a power station from the control station, the slave station is a process The process I / O unit consists of an input / output unit and a transmission unit. The process I / O unit periodically receives status data indicating the status of the monitored device, a clock that operates in synchronization with the clock of the master station, and a DI. The input processing unit that processes the status data with time consisting of the status data captured this time in the circuit and the time data captured from the clock, the current data file that temporarily stores the status data with time, and the current data file If there is a change as a result of comparison between the comparison processing unit that compares the state data that has been fetched with the state data that has been fetched up to the previous time, and if there is a change, the state data with time after the change is changed. And a transmission unit for transmitting the state change data to the transmission unit, and the transmission unit is a state change data buffer for temporarily storing the state change data by the transmission unit. And a transmission processing unit that monitors the state change data in the state change data buffer and edits the state change data for each predetermined combination group, and a data editing unit that stores the state change data edited for each combination group. The transmission processing unit is provided with a buffer, and the transmission processing unit retrieves the grouped state change data from the data editing buffer after a timer that starts with specific state change data and this timer has elapsed a set time. Data creating means for creating transmission data for each group based on the time data of the data.

Further, in the second aspect of the invention, instead of the timer which is started by the specific state change data of the transmission processing section, the timer of the transmission processing section is started by the state change data within the group for each combination group. After each timer has passed the set time, the status change data edited for each group is taken out from the data editing buffer, and the transmission data is sent based on the time data of the edited status change data. Shall be created.

[0013]

With the above-described structure, in the present invention, the status data of all devices are periodically loaded into the DI circuit regardless of whether the status data has changed, and this status data and the time data at the time of loading are added. Temporary state data with time is temporarily stored in the current data file, and if there is a change as a result of comparing the state data captured in this data file with the relevant state data captured up to the previous time,
The state data with time after the change is used as state change data, the state change data is stored in the previous data file, and the state change data at this time is temporarily stored in the state change data buffer of the transmission unit. Therefore, in this status change data buffer,
Only the condition data that the state of the monitored device has changed,
It can be captured as state change data with time data close to the time when the state change occurs. To be precise, the time data is the sampling time when the state data is taken into the DI circuit, but by appropriately advancing this sampling time, the sampling time can be regarded as a time when a state change occurs practically. .

The transmission processing section has a timer which is activated by specific state change data, and after the timer setting time T, the grouped state change data is taken out from the data editing buffer, and the time data of this state change data is obtained. Based on this, by editing the transmission data for each group within the time T, regardless of the system bus delay time, the status change data generated during the operation of the timer is transmitted by the specified transmission packet, It is possible to provide a remote monitoring control device having a display processing function of state change data.

Further, the transmission processing section has, for each combination group, a timer which is activated by any state change data within the group, and after each timer has passed a set time, the group is transferred from the data editing buffer to the corresponding group. By taking out the state change data edited for each and creating transmission data based on the time data of the edited state change data, the state change data within the group and the related group within the time T The status of the monitoring target device can be quickly transmitted by the same transmission packet, and the device status of the monitoring target device which is closely related can be displayed with a quick response.

That is, the status change data is composed of time data when a change occurs in the status data of the equipment to be monitored and status data after the change at that time, and is edited based on this time data when editing the transmission data. As a result, it becomes possible to accurately edit the state change data within the specified time, which is not affected by the transmission delay time of the system bus.

[0017]

FIG. 1 is a functional block diagram of a distant monitoring control apparatus according to an embodiment of the present invention. The same functional members corresponding to FIGS. 2 to 4 on the technical side are marked with the suffix A for classification. The main difference between FIG. 1 and the conventional technique of FIG. 2 is that the process input / output unit 5 of the slave station 2 is provided with a clock 52, and the current data file 54 and the previous data file 55 show the status of the monitored device 4. The time data when the DI circuit 51 is periodically loaded is added to the state data indicating the. Hereinafter, the difference from the prior art will be mainly described.
In FIG. 1, the process input / output unit 5 detects state data indicating the operating state of the monitored device 4 in the substation or power plant by the devices (a ..., A to Z), and periodically in the DI circuit 51. It is captured. The input processing unit 53 combines the time data of the clock 52, which operates in synchronization with the clock of the master station, with the state data periodically fetched by the DI circuit 51, and temporarily stores the time data in the current data file 54 as time data. To remember.

The comparison processing unit 56 compares the status data taken in this time data file 54 with the status data taken up to the previous time, and if there is a change in this comparison result,
The changed state data with time is used as state change data, and this state change data is transferred and stored in the previous data file 55 that stores the state change data. At the same time, the state change data is transmitted to the state change data buffer 61 of the transmission unit 6 via the system bus 7. When there is no change in the ratio comparison result in the comparison processing unit 56,
This means that there is no change in the state data, and therefore no state change data is transmitted to the previous data file 55 and state change data buffer 61. Therefore, the previous data file
55 stores the latest state change data up to the previous time. Therefore, in the comparison processing unit 56, the current data file 54
The change in the state data can be detected by comparing the state data in the previous data file 55 and checking for the change.

By appropriately advancing the sampling cycle of the status data to the DI circuit 51, the sampling time of the status data to the DI circuit 51 may be regarded as the time when the state change occurs in practice. That is, when the comparison processing unit 56 detects a change, the status data with time in the current data file 54 is set as status change data, so that the status change data is obtained at the time when the DI circuit 51 captures the status data. It is possible to detect the data storage time in the current data file 54, the comparison processing time in the comparison processing unit 56, the transmission delay in the system bus 7, and the state change data buffer 61 or the transmission processing unit 63. The state change time can be added to the state change data and only the state change data can be stored in the state change data buffer 61 without being affected by a time delay such as a processing time.

Therefore, the transmission processing unit 63 detects only the status change data by monitoring the status change data buffer 61, and edits each group according to the device number and the grouping data of the monitored devices registered in advance. Then, the edited state change data is stored in the data editing buffer 64.
On the other hand, in the first invention, the timer provided in the transmission processing unit 63 is
A specific state change data, for example, a timer is started by the device a, and after a certain time T has passed, the grouped state change data of each group is called from the data editing buffer 64 and attached to the state change data. Based on the time data when the state change occurs, it is possible to create the state data that has changed within the above-mentioned fixed time T as transmission data.

In the second aspect of the invention, the timer of the transmission processing unit 63 has a timer for each combination group which is activated by any state change data in the group, and each timer has passed the set time. After that, take out the status change data edited for each group from the data editing buffer 61,
The transmission data can be created based on the time data of the edited state change data.

As a result, with the occurrence of the status change data within the group, the status of the monitored device within the related group that occurs within the time T can be quickly transmitted by the same transmission packet, and the relationship among the monitored devices can be increased. It is possible to detect changes in the status of deep devices quickly and accurately, and to display and process the master station at the control station with quick response. Transmission processing unit 63
Although there are some differences depending on the configuration of the timer, the status change data is composed of time data when the status data of the monitored device has changed and status data after the change, and when the transmission data is edited, By editing on the basis of this time data, it is possible to accurately edit the state change data within the designated time, which is not affected by the transmission delay time of the system bus.

The data transmitted by the transmission processing unit 63 is transmitted by transmitting the above-mentioned state change data with state change time stored in a group in the data editing buffer 64 instead of the batch transmission time. On the station 1 side, the state of the monitored device 4 can be known in more detail, and a more detailed display processing function can be performed. Further, even if the transmission processing unit 63 lengthens the period for monitoring the state change data buffer 61, it does not affect the packaging of the transmission data because the state change data with time is processed. Therefore, it is possible to lengthen the interval at which the transmission processing unit 63 monitors the condition data buffer 61, and another process can be performed during this idle time, for example, even if a redundant system is configured, the CPU board and system bus On the other hand, it is possible to perform the processing without significantly increasing the load.

[0024]

As described above, according to the present invention, the operating conditions such as the operation / stop of the plant or the auxiliary equipment of the controlled station such as the substation or the power station can be controlled by the remote station side of the remote monitoring control device. By capturing status data at appropriate sampling intervals,
In addition, by comparing the current state data with the state data up to the previous time, the state data with time data at the time of sampling can be practically regarded as the state data with time data in which the state data has changed. By examining the time data of the state change data, it becomes possible to accurately edit the state change data within the designated time without being affected by the transmission delay time of the system bus.

Further, by transmitting the status change data with time data, which is grouped and stored in the data editing buffer, the master station side can know the state of the equipment to be monitored in more detail. It is possible to perform various display processing functions. Further, even if the transmission processing unit lengthens the period for monitoring the state change data buffer, it does not affect the packaging of the transmission data to the master station because it is processed with the time data of the state change data with time. . For this reason, it is possible to lengthen the interval at which the transmission processing unit monitors the condition data buffer, and to perform another processing during this idle time, for example, even when configuring a redundant redundancy system, to the CPU board or system bus. On the other hand, it is possible to perform processing without causing a significant increase in load.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a remote monitoring control device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of a remote monitoring control device according to a conventional technique.

[Fig. 3] Fig. 3 shows an example of group editing of state change data, (A) is an explanatory diagram for explaining the relationship between changes in the status data of monitored devices and examples of editing transmission data, and (B) is deeply related to each other. Device classification edit combination diagram

FIG. 4 corresponds to the group editing example of the state change data of FIG.
Explanatory drawing explaining the problem of the prior art

[Explanation of symbols]

 1 Master station 2 Slave station 3 Transmission line 4 Monitored device 5,5A Process input / output section 51 DI circuit 52, 62 Clock 53 Input processing section 54,54A Current data file 55,55A Previous data file 56 Comparison processing section 6,6A Transmission unit 61,61A Condition data buffer 63 Transmission processing unit 64,64A Data editing buffer 65 Modem 7 System bus

Claims (2)

[Claims] 1. A control station, comprising: a master station installed in a control station; a slave station installed in a controlled station; and a transmission line connecting the master station and the slave station. In the remote monitoring control device for monitoring and controlling the monitored device such as the controlled place, the slave station includes a process input / output unit and a transmission unit, and the process input / output unit is a state of the monitored device. A DI circuit that periodically captures the state data indicating the, a clock that operates in synchronization with the clock of the master station, the state data that was captured by the DI circuit this time, and the capture time data from the clock. An input processing unit that processes the time-stamped state data, a current data file that temporarily stores the time-stamped state data, the state data that has been captured in this data file, and the state data that has been captured up to the previous time. If there is a change as a result of comparison by this comparison processing unit, the state data with time after the change is used as state change data, and the previous data file storing this state change data and the state change A transmission unit for transmitting data to the transmission unit, the transmission unit monitoring the state change data in the state change data buffer for temporarily storing the state change data by the transmission unit; A transmission processing unit that edits the state change data for each predetermined combination group, and a data editing buffer that stores the state change data that has been edited for each combination group are provided. A timer that starts with the state change data of
A data creating means for taking out the grouped state change data from the data editing buffer after a lapse of a set time by the timer, and creating transmission data for each group based on the time data of the state change data. And a remote monitoring and control device. 2. The remote monitoring control apparatus according to claim 1, wherein a timer included in the transmission processing unit is replaced by a timer included in the transmission processing unit instead of the timer activated by the specific state change data included in the transmission processing unit. There is a timer that starts with the state change data, and after each timer has passed the set time, the state change data edited for each group is taken out from the data editing buffer, and the time data of this edited state change data A remote monitoring and control device characterized in that transmission data is created based on.