JPS59189404A - Dispersion type control device of multiple redundant system - Google Patents

Abstract

PURPOSE:To realize stabilization, conversion to a high reliability, and conversion to a low cost of a plant by constituting a controlled system of a main loop, of a multiple redundant system, dispersing the controlled system to each system, and using a map which has executed weighting corresponding to a degree of importance of each loop. CONSTITUTION:A titled device is constituted of a control device (SYS- I ) 1a, a control device (SYS-II) 1b, weight maps 2a, 2b corresponding to a degree of importance of each loop, operating parts 3a, 3b for calculating the obtained points by its map, and switching parts 4a, 4a', 4b and 4b' for executing the switching by its result. The SYS- I 1a always controls controlled systems 5-1, 5-2 of the first and the second loops, and the SYS-II 1b always controls controlled system of the third and the fourth loops. When abnormality of an input part of the second loop of the SYS- I is generated, the first and the second loops are switched to an emergency system of the SYS-II by a result of operation of the operating parts 3a, 3b. Therefore, the switching parts 4a is opened, 4b is closed, and the switching is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a multiple redundant system control device, and particularly to a control device that performs distributed control of M loops suitable for increasing reliability.

[Prior art]

Conventional redundant system control devices rarely have a single-loop redundant system configuration in which control is performed by evaluating the health of each system and selecting the optimal system.

In recent years, problems have arisen such as the increase in the cost of control devices due to the increase in the number of control objects and their complexity due to the increase in the size of plants, and the increase in the number of redundant systems aimed at improving reliability.

[Purpose of the invention]

The object of the present invention is to suppress the increase in the cost of the control device by configuring the control object of the M loop as a multiple redundant system, distribute the control object to each system, and weight it according to the importance of each loop. A calculation section that calculates the score of each system from the map when an abnormality occurs in the input section and output section of each loop, and a switching circuit that mutually judges based on the results and switches to the optimal system. The present invention aims to provide an M-loop multiple redundant distributed control device that satisfies plant stability, high reliability, and low cost.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIG. 1, in which a 4-loop, dual-system distributed redundant control device is used.

This system is a control equipment engineer (hereinafter abbreviated as 5M5-I) la
and a control device (hereinafter abbreviated as 5ys-H) 1b It consists of 5YS-
11a is the first. 5-1.5-2 in the 2nd loop is always antibacterial, 5YS11b is 5-3.5-4 in the 3rd + 4th loop
The first and third loops are given 50 points depending on the level of chivalry, and the second... The fourth one will be worth 25 points.

For example, if an abnormality occurs in the input section of the second loop of 5M5-I, the computing unit 3a will calculate the score of the common system of tsYs-I) - (
5YS-IT emergency score)'fK: 50 for practical purposes
+O) -, (50+25) = -25 (0, computing unit 3b calculates (SYS-II regular user's score) - tsys-i's emergency system score) - (50 + 25) - 150 + 25) = O, 5YSI's Since the score of the emergency system of 5M5-n is higher than that of the regular system, the switch opens 43 and closes 4b' to complete the switching in order to switch to the emergency system of the first and second loops esYs-■. continue. As a result, the 5YS-I enters a maintainable state and the system continues standby operation.

In this state, if an abnormality occurs in the 3rd and 4th loops of 5ys-n, the above calculation is executed, and since the score of 5M5-i is large, the switching section 4a+4a'ffi of 8Y8-J is closed, 4l]+ By opening 4''k and continuing bacteriostatic control, Control 1 can be continued while minimizing the impact on the plant.

〔Effect of the invention〕

According to the present invention, it is possible to operate the controlled objects of the four loops with high reliability, and it can greatly contribute to increasing the reliability of plant operation, reducing the cost of the control device, and early countermeasures against system abnormalities.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram of a multiple redundant distributed i4i control system.

Claims (1)

[Claims] 1. A control device that performs distributed control of an M-loose control target, which has a map that is weighted in advance according to the importance of each loop, and a calculation unit that calculates the score of the loop failure pot system from the map. , a multi-redundant system distributed braking system characterized by having a switch that mutually judges the calculation results and transfers control to the optimal system.