JPH11205345A - Distributed type centralized supervisory and controlling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue processings and to improve reliability by bypassing a faulty LAN and transmitting and receiving data in the case of a fault occurrence in a part of a LAN between CPU devices. SOLUTION: In order to efficiently process data, a LAN is divided into a LAN 1 and a LAN 2. When data from a CPU 2 are transmitted to a CPU 4 in a state of having no abnormal LAN, a route from an interface 2b to an interface 4b is tested first corresponding to LAN route information. LAN normal/abnormal information of the above route is 'normal', the route is used for transmission and data transmission is completed. For instance, when LAN abnormality occurs only in the route from the interface 2b to an interface 5b, a bypass route in the transmission from the CPU 2 to the CPU 5 is composed of a route from an interface 2a to an interface 3a, a CPU 3 and a route from the interface 3b to the interface 5b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a central processor unit (hereinafter, referred to as a CPU) and one or more of various functions such as data processing, transmission, monitoring, operation, control, and recording. (Hereinafter referred to as CP
It is described as U device. ) Are arranged in the area, and these C
A PU device is connected to a plurality of local area networks (hereinafter referred to as L
Described as AN. The present invention relates to a decentralized centralized monitoring and control device that is combined as a whole to constitute one centralized monitoring and control device, and more particularly to a distributed centralized monitoring and control device for a substation where continuous operation demands are strict.

[0002]

2. Description of the Related Art A centralized monitoring and control device for a substation has a high performance due to an increase in the number of power facilities and a demand for high quality of electricity.
High reliability is required. In response to this demand, a distributed centralized monitoring and control device has been developed in which functions are distributed to each CPU device to constitute one centralized monitoring and control device as a whole. FIG. 4 is a block diagram showing a configuration of a conventionally proposed distributed centralized monitoring and control device for a substation. The LAN 1 for efficiently processing data for transmission and reception to and from a LAN to be controlled and a LAN 1 for operation of monitoring and control. Is divided into two LANs 2 for efficiently processing the data of the man-machine system, and the CPU 1 is connected to the LAN 1 via the interface 1a,
The CPU devices 3 are connected to each other via the interface 3a, and the LAN 2 is connected to the CPU device 3 via the interface 4b.
The PU device 4 is configured by connecting the CPU device 5 via an interface 5b, and connecting LAN1 and LAN2 with bridges B1 and B2. These CPU devices are, for example, a CPU device 1 is a remote monitoring control device, a CPU device 2 is a main CPU device for monitoring control,
The PU device 3 is an information transmission device, the CPU device 4 is a man-machine device for monitoring operation, and the CPU device 5 is a man-machine device for business support.

Although the distributed centralized monitoring and control device of the substation shown in FIG. 4 fulfills the purpose of distributing functions, it has some problems. Since the bridges B1 and B2 are used, the number of components increases by that amount, and the reliability decreases, the amount of data flowing through the LAN 1 increases, and monitoring that requires transmission and reception of data with all other CPU devices is required. If a failure occurs in the path between the CPU 2 serving as the main CPU for control and the LAN 1, the CPU 2 will not function. LAN with man-machine data
This is a problem that it does not meet the original purpose of LAN division because it is mixed within the network. For this reason, the device shown in FIG. 4 has not been put to practical use.

Therefore, it is necessary to avoid using a bridge and to use a CPU.
Even if a failure occurs in the path between the device 2 and the LAN 1, the CP
In order to prevent the U device 2 from functioning, the bridges B1 and B2 are removed from the block diagram of FIG. 4 and the CPU device 2 and the CPU device 3 are connected to both LAN1 and LAN2, respectively. A centralized monitoring and control device was developed. However, in this distributed centralized monitoring and control device, the LAN used for transmitting and receiving information between the CPU devices is fixedly determined. Therefore, if a failure occurs in a part of the two LANs, the system may depend on the failure location. There is a problem that some or all of the functions are stopped and continuous operation becomes impossible as a centralized monitoring and control device.

[0005]

A first problem to be solved by the present invention is that a large number of CPU devices are arranged in an area such as a workshop, and these CPU devices are connected by a plurality of LANs as a whole. In a distributed centralized monitoring and control device constituting one centralized monitoring and control device, if a failure occurs in a part of the LAN between the CPU devices, the failed LA
It is an object of the present invention to provide a highly reliable distributed centralized monitoring and control device which can continue processing by transmitting and receiving data while bypassing N. A second problem to be solved is to solve the first problem so as not to impose an excessive burden on the hardware configuration and software production.

[0006]

In order to solve the above-mentioned problems, the present invention provides a plurality of LANs, a first group of CPU devices respectively connected to at least two of the plurality of LANs, And a second group of CPU devices connected to any one of the LANs, a data transmission destination CP is provided to each of the first group of CPU devices.
A memory for storing LAN route information for each U device and LAN normal / abnormal information with another CPU device, and monitoring the status of the LAN between the CPU devices at a fixed cycle to update the LAN normal / abnormal information. A LAN monitoring unit, a data transmission unit for transmitting data according to the LAN path information and the LAN normal / abnormal information, and a data processing unit for processing data are provided.

[0007]

FIG. 1 is a block diagram of a distributed centralized monitoring and control apparatus according to one embodiment of the present invention. The distributed centralized monitoring and control device shown in FIG. 1 handles two types of data: data for transmission / reception to and from a control target and man-machine data for operation of monitoring and control. For better processing, LAN is LAN1 and LAN2.
Is divided into two. The control target location side LAN1 has a CP
U device 1 is connected to CPU device 2 via interface 1a.
Are connected via the interface 2a, and the CPU device 3 is connected via the interface 3a. The CPU 2 is connected to the man-machine LAN 2 via the interface 2b, the CPU 3 is connected via the interface 3b, the CPU 4 is connected via the interface 4b, and the CPU 5 is connected via the interface 5b.

FIG. 2 is a block diagram of the CPU device 2, which includes a data transmitting / receiving unit 21, a data processing unit 22, a LAN monitoring unit 23, and a memory storing LAN path information 24 and LAN normal / abnormal information 25. The data transmission / reception unit 21 is connected to the LAN 1 to be controlled via the interface 2a and to the LAN 2 on the man-machine side via the interface 2b. The data processing unit 22 and the data transmitting / receiving unit 21 are connected by a bus. Data transmission / reception unit 21
Refers to the LAN path information 24 and the LAN normal / abnormal information 25, and transmits information using a path having a higher priority and a path in which no abnormality has occurred. An example of the LAN path information 24 stored in the memory of the CPU device 2 is shown in Table 1.
Table 3 shows an example of the LAN normal / abnormal information 25. Although not shown, the CPU device 3 also has a data transmitting / receiving unit 31 and a data processing unit 3.
2. LAN monitoring unit 33 and LAN route information 34 and LAN
And a memory storing normal / abnormal information 35 and the like. CP
LAN route information 34 stored in the memory of the U device 3
Is as shown in Table 2, and an example of the LAN normal / abnormal information 35 is as shown in Table 4.

[0009]

[Table 1]

[0010]

[Table 2]

The operation of the above embodiment will be described. First,
CPU device 2 to CPU device 4 without abnormal LAN
A description will be given of a case in which data is transmitted to. In this case, the LAN normal / abnormal information 25 is all normal. In this state, data transmission from the CPU device 2 to the CPU device is performed by LA.
According to the N route information 24, first, a route from the interface 2b to the interface 4b is tried. LA of the route from this interface 2b to interface 4b
Since the N-normal / abnormal information 25 is "normal", the transmission is performed using this route, and the data transmission from the CPU device 2 to the CPU device 4 is completed.

[0012]

[Table 3]

[0013]

[Table 4]

Next, a case where data is transmitted from the CPU device 2 to the CPU device 4 in a state where a LAN abnormality has occurred only in the path from the interface 2b to the interface 4b will be described. In this case, the LAN monitoring unit 23 of the CPU device 2 that monitors at a fixed cycle sends the L signal from the interface 2b to the path from the interface 4b.
It is detected that an AN abnormality has occurred, and “abnormal” is set in the state of the interface 2b to the interface 4b of the LAN normal / abnormal information 25 stored in the memory of the CPU device 2.

In this state, the CPU device 2 to the CPU device 4
In the data transmission to the interface 2, first, the route from the interface 2b to the interface 4b is tried according to the LAN route information 24. Referring to the LAN normality / abnormality information 25 of the route from the interface 2b to the interface 4b is "abnormal", so the route from the interface 2a to the interface 3a, which is the route of priority 2, is tried. Referring to the LAN normal / abnormal information 25 of the route from the interface 2a to the interface 3a, the status is "normal", so that transmission is performed using this route,
Data transmission from the CPU device 2 to the CPU device 3 is performed.

The CPU device 3 first tries the route from the interface 3b to the interface 4b according to the LAN route information 34. LAN normal / abnormal information 3 on the route from interface 3b to interface 4b
5, the transmission is performed through this route because the status is "normal", and the data transmission from the CPU device 3 to the CPU device 4 is completed. Therefore, data transmission from the CPU device 2 to the CPU device 4 is completed by passing through the CPU device 3. Thus, the path from the interface 2b to the interface 4b, that is, the CPU device 2 and the CPU
If a failure occurs in a part of the LAN to the device 4, the CPU device 2 bypasses the failed LAN to
Data transmission to the PU device 4 has become possible. In this case, the bypass path includes a path from the interface 2a to the interface 3a, the CPU device 3, and a path from the interface 3b to the interface 4b. C
In the PU device 3, the data processing unit converts the data into data suitable for the LAN on the man-machine side so that two types of data are not mixed in the LAN on the man-machine side.

The bypass in the case where data is transmitted from the CPU 2 to the CPU 4 in a state where a LAN abnormality occurs only in the path from the interface 2b to the interface 4b has been described. Similarly, a bypass is formed. For example, from interface 2b to interface 5b
C in a state where a LAN error occurs only in the route of
When data is transmitted from the PU device 2 to the CPU device 5, the bypass route includes a route from the interface 2a to the interface 3a, a route from the CPU device 3, and a route from the interface 3b to the interface 5b. Further, the CP in the state where the LAN abnormality occurs only in the path from the interface 4b to the interface 3b.
When data is transmitted from the U device 4 to the CPU device 3, the bypass route includes a route from the interface 4b to the interface 2b, a route from the CPU device 2, and a route from the interface 2a to the interface 3a.

The LAN 1 to be controlled and the L on the man-machine side
The CPU device 2 connected to each of the two ANs 2 is a main CPU device for monitoring and control, and performs substation state management, operation procedure table development based on operation commands, equipment operation state management, data source management, and the like. is there. Similarly, the CPU devices 3 connected to these two LANs are information transmission devices for transmitting and receiving various information to and from other systems. CP connected to these two LANs
The U device 2 and the CPU device 3 are the first group of CPU devices in the present specification, and are connected to only one of the two LANs.
The device 5 is a second group of CPU devices. The CPU device 1 belonging to the second group is a remote monitoring control device, the CPU device 4 is a man-machine device for monitoring operation, and the CPU device 5 is a man-machine device for business support. The frequency of data transmission / reception with other CPU devices is much higher in the first group of CPU devices than in the second group of CPU devices.

The first group of CPU devices, ie, CPU device 2 and CPU device 3, are connected to two LANs, ie, the LAN 1 to be controlled and the LAN 2 on the man-machine side, and as shown in FIG. A memory for storing LAN path information and LAN normal / abnormal information with other CPU devices, a LAN monitoring unit for monitoring the status of the LAN between the CPU devices at regular intervals and updating the normal / abnormal information,
The provision of the data transmission unit for transmitting data in accordance with the LAN route information and the LAN normal / abnormal information and the data processing unit for processing the data means that the first group of CPU devices is compared with the second group of CPU devices. Therefore, the device has a more important function.

FIG. 3 shows that the LANs are LAN1, LAN2 and LA.
FIG. 9 is a block diagram showing how a first group of CPU devices are connected to these three LANs in a distributed centralized monitoring and control device divided into three N3. In FIG. 3, a CPU device 2 includes interfaces 1a, 1b, 1
c, they are connected to LAN1, LAN2 and LAN3, respectively. The other first group CPU devices 3 are similarly connected to three LANs. By connecting as described above and configuring these first group of CPU devices as shown in FIG.
A distributed centralized monitoring and control device including three LANs also has a CPU
It will be apparent that if a failure occurs in a part of the LAN between the devices, the processing can be continued by transmitting and receiving data by bypassing the failed LAN.
Of course, the present invention is also applicable to a distributed centralized monitoring and control device in which a LAN is divided into three or more. Further, in the above embodiment, the first group has two CPU devices, but the distributed centralized monitoring and control device of the present invention can be configured even with three or more CPU devices.

[0021]

As described above, according to the present invention, a plurality of LAs are provided.
N, a first group of CPU devices respectively connected to at least two of the plurality of LANs,
And a second group of CPU devices connected to any one of the first group, wherein each of the first group of CPU devices has LAN path information for each data transmission destination CPU device and another CPU device. And a memory for storing LAN normal / abnormal information between the CPU device and the LA between the CPU devices at a constant period.
A LAN monitoring unit that monitors the status of N and updates LAN normal / abnormal information; a data transmitting unit that transmits data according to the LAN path information and the LAN normal / abnormal information;
And a data processing unit for processing data, so that the hardware configuration of the conventional distributed centralized monitoring and control device does not require a significant change,
If a failure occurs in a part of the AN, the failed LAN
A highly reliable decentralized centralized monitoring and control device that can continue processing by transmitting and receiving data by bypassing is provided. In addition, software for forming a bypass relates to LAN route information and LAN normal / abnormal information for each data transmission destination CPU device, and does not generate excessive cost for software production.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a distributed centralized monitoring and control device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an embodiment of a CPU device 2 belonging to a first group.

FIG. 3 is a block diagram showing a case where a CPU device 2 is connected to three LANs.

FIG. 4 is a block diagram showing a configuration of an example of a conventional distributed centralized monitoring and control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 CPU apparatus 1 2 CPU apparatus 2 3 CPU apparatus 3 4 CPU apparatus 4 5 CPU apparatus 5 1a interface 2a interface 2b interface 2c interface 3a interface 3b interface 4b interface 5b interface 21 data transmission / reception section 22 data processing section 23 LAN monitoring section 24 CPU LAN route information stored in the memory of the device 2 25
Abnormality information LAN1 First local area network LAN2 Second local area network LAN3 Third local area network B1 First bridge B2 Second bridge

Claims (2)

[Claims] 1. A plurality of LANs and a first group of CPUs respectively connected to at least two of the plurality of LANs
And a second group of CPU devices connected to any one of the plurality of LANs.
The device has a memory for storing LAN route information for each data transmission destination CPU device and information on LAN normal / abnormality with other CPU devices, and monitors the status of the LAN between the CPU devices at regular intervals to perform LAN normal / normal operation. LAN for updating error information
A distributed centralized monitoring and control device, comprising: a monitoring unit; a data transmission unit that transmits data according to the LAN path information and the LAN normal / abnormal information; and a data processing unit that processes data. 2. Two LANs, a first group of CPU devices respectively connected to the two LANs, and the two L
And a second group of CPU devices connected to any one of the ANs.
A memory for storing LAN path information for each PU device and LAN normal / abnormal information with other CPU devices, and a LAN for monitoring the status of the LAN between the CPU devices at regular intervals;
A LAN monitoring unit for updating normal / abnormal information;
A distributed centralized monitoring and control device comprising: a data transmitting unit that transmits data according to path information and LAN normal / abnormal information; and a data processing unit that processes data.