JPH01142803A - Plant controller - Google Patents

Abstract

PURPOSE:To improve the flexibility of a plant, to improve the reliability of the plant and to rationalize a control apparatus by allowing plural computers for controllers to execute the operation of control signals to respective actuators. CONSTITUTION:An operation control computer 1 in a power plant level is connected to plural monitoring/operating computers 3 in a unit level through an optical data highway 2, the computers 3 are connected to plural controller computers in a system level through an optical data highway 4 and the computers 5 are connected to detectors in a generating unit 7, etc., and actuators in an operation terminal through an optical data highway 6. For instance, three actuators of the same kind compute three control signals and the actuators select an intermediate value e.g. out of these control signals to control the plant. Consequently, the reliability can be improved without multiplexing the computers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to a plant control device for a nuclear power plant, a thermal power plant, etc.

(Prior Art) In recent years, as the capacity of nuclear power plants has increased and their proportion in the electric power system has increased, demands for diversified operations and highly efficient operation have increased. Furthermore, since nuclear power plants are large-scale systems, safety and reliability are strongly demanded from society.

Therefore, it has become an important issue in recent years to create a modern, economical nuclear power plant that meets the above requirements and has rationalized equipment and functions.

Items required of modern nuclear power plants include improvements in operability, controllability, reliability, and maintainability.

It is difficult to meet these demands with conventional centralized systems.For example, when automation is implemented to improve driving operability, a wide variety of complex functions are concentrated on the central control computer system. , Since the amount of processing becomes enormous, it becomes difficult to ensure reliability and maintainability.

For this reason, it has been considered to realize the above requirements by using a functionally distributed digital control system in which the system is hierarchized and distributed according to function using a microprocessor.

(Problems to be Solved by the Invention) However, control systems using microprocessors generally have multiple configurations such as multiplexing to ensure reliability, and it is difficult to rationalize and maintain control equipment. A problem arises.

The present invention has been made in response to such conventional circumstances, and aims to provide a plant control device that can improve plant flexibility, improve reliability, and rationalize control equipment at the same time. It is something to do.

[Structure of the Invention] (Means for Solving the Problems) That is, the plant control device of the present invention connects a group of controller computers and a host computer via a data highway, and transmits data from a database to each controller computer. By downloading to the computer, each controller computer can be substituted for each other, and the controller computer group and the detector and actuator group are connected by a data highway, and the calculation of control signals for each actuator is performed by multiple controller computers. The present invention is characterized in that it is configured to be executed by a controller computer.

(Function) In the plant IIJ control device of the present invention having the above configuration, in a function-distributed digital control system in which the system is hierarchized and decentralized by function, the number of controller computers required for decentralization can be achieved without multiplexing the controller computers. By simply using two controller computers, it is possible to obtain the same reliability as when multiple controller computers are used.

(Embodiment) An embodiment of the plant control device of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a plant control device according to an embodiment of the present invention, in which a power plant-level operation management computer 1 is connected via an optical data highway 2 to a plurality of unit-level monitoring and operation computers. Connected to computer 3. Further, these monitoring and operating computers 3 are connected to a plurality of controller computers 5 at the system level via optical data highways 4, respectively. These controller computers 5 are connected to detectors and actuators at the operating end in local-level units such as the power generation unit 7 via process input/output devices 8 and interfaces 9, respectively, via optical data highways 6. ing.

Note that the optical data highway 2.4.6 has a double loop, and is configured so that the transmission loop can be reconfigured by loopback in the event of an abnormality.

Further, each of the optical data highways 2.4 is provided with a database 10.11, and the optical data highway 4 can be connected via a bridge 12. The multiple monitoring and operation computers 3 at the unit level and the multiple controller computers 5 at the system level are each standardized for each level. For example, if a failure occurs in one computer, the other computers A computer at the same level can be replaced by downloading the software and data of the failed computer from the database 10 or the database 11.

Furthermore, the local level controller computers 5 are configured such that, for example, three controller computers 5 each calculate three control signals to the same three actuators, and the actuators select, for example, from among these control signals. It is configured to perform control by selecting an intermediate value. Note that the process amount measured by the detector is analog/digital converted and optically converted by the process input/output device 8 and sent to the optical data highway 6.
be taken into account. Furthermore, on the optical data highway 6, each piece of data is transmitted as data with a function code indicating the data content, and each device selectively receives data according to this function code.

In the plant control device of this embodiment having the above configuration, as described above, the monitoring and operation computer 3 and the controller computer 5 can be replaced by computers on the same level without multiplexing the computers. . In addition, the three controller computers 5 each calculate control signals to the three actuators, and the actuators are configured to select an intermediate value from among these control signals to perform control.
Reliability can be improved without multiplexing computers.

Furthermore, in the past, for example, a controller and an actuator were each connected in series, which required a large amount of cables, but in the present invention, since they are connected by an optical data highway, the number of cables can be reduced.

[Effects of the Invention] As described above, the plant control device of the present invention can improve the flexibility of the plant, improve reliability, and rationalize control equipment at the same time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a plant control device according to an embodiment of the present invention. 1...... Management computer 2.4.6,... Optical data highway 3...
......Monitoring and operation computer 5
・・・・・・・・・・・・・・・Controller computer 7・・・・・・・・・・・・・・・Generation unit 8・・・・・・・・・・・・・・・・Process input/output device 9・・・・・・・・・・・・Interface 1
0.11...Database Applicant Japan Atomic Energy Corporation Applicant Toshiba Corporation Agent Patent Attorney Satoshi Suyama −

Claims (2)

[Claims] (1) By connecting a group of controller computers and a host computer via a data highway and downloading data from a database to each controller computer, each controller computer can be substituted for each other, and the 1. A plant control device characterized in that a group of computers and a group of detectors and actuators are connected by a data highway, and a plurality of controller computers are configured to calculate control signals for each actuator. (2) The plant control device according to claim 1, wherein the data highway is a multiplexed optical data highway.