JPS62262101A - Computer system for controlling thermal power plant - Google Patents

Abstract

PURPOSE:To perform unconditional disregard operation by an operator when a plant interlock condition of final control element is unestablished, by forming an OR circuit by making a condition disregard signal set to correspond to the final control element en block with the plant interlock condition of the final control element. CONSTITUTION:AND condition of plant interlock is decided by the plant interlock condition 3, and start and stop command of the final control element is outputted by the AND circuit of a final control element output processing means 4 through a condition disregard processing means 5 consisting of an OR circuit. When a part of plant interlock condition is not established by a condition deciding means 3, an operator sets the number of a condition disregard signal point set to correspond to the final control element. Thereby, the OR circuit of the processing means 5 receives a setting signal, and outputs start/stop command to final control element output through an output processing means 4. Thus, unconditional disregard operation by an operator when plant interlock condition of the final control element is not yet established becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a computer system for controlling a thermal power plant, which controls the start-up and shutdown of a thermal power plant.

[Conventional technology]

Figure 2 shows, for example, Denki Hyoron, June 1984 (P, 50
9-516) Utilization status of computers in thermal power plants, This is an illustration of a control computer system based on the conventional plant table method programming shown in "Automation technology for start/stop operations." In the figure, 1 indicates various analog A control computer system that centrally controls control, digital control, and sequence control; 2, timing condition determination means for determining start/stop timing of the operating end; 6, plant interlock condition determination for determining plant interlock conditions of the operating end; Reference numeral 4 denotes an operating terminal output processing means for outputting to the operating terminal, and 5 indicates a condition ignoring processing means that accepts the operator's ignoring of the condition.

Next, the operation will be explained. First, in the control computer system 1, the timing condition determining means 2 determines the start/stop timing regarding the starting/stopping control of a certain operating end, and if the timing condition is satisfied, the plant toy/tallock condition determining means 3 determines the start/stop timing. It is determined that the plant interlock conditions are satisfied, and when all the conditions are correct, the operating end output processing means 4 outputs a start φ stop command to the operating end. Further, when the plant interlock condition determining means 3 determines that some of the plant interlock conditions are not satisfied, the operator sets data of each point number of the unsatisfied plant interlock conditions in the condition ignoring processing means 5,
By processing, a start/stop command is output to the operating terminal 29 to the operating terminal output processing means 4.

[Problem that the invention seeks to solve]

Since the conventional computer system for controlling thermal power plants is configured as described above, when applying the logic diagram type programming means, nine condition ignoring processing means are created corresponding to each condition signal of the plant interlock conditions. It is necessary to construct the condition-ignoring signal of No. 5 in an OR circuit, and when the amount of logic in the plant becomes large, the memory capacity of the control computer system naturally increases, and the calculation speed also takes a long time.

This invention was made in order to solve the above-mentioned problems, and by configuring an OR circuit by combining the condition heat and current signal set for the operation end in advance with the plant interlock conditions of the operation end. The purpose of this invention is to obtain a computer system for controlling a thermal power plant in which the amount of logic does not increase.

[Means for solving problems]

A computer system for controlling a thermal power plant according to the present invention configures an OR circuit by combining a condition ignoring signal set corresponding to the operating end with the plant interlock condition of the operating end, so that the plant interlock condition of the operating end is ignored. This is useful because it allows the operator to ignore the condition when the condition is established.

[Effect]

In the control computer system for starting and stopping a thermal power plant in this invention, the condition ignoring signal of the interlock condition set for the operating end facilitates the condition ignoring operation by the operator when the plant interlock condition of the operating end is not satisfied. Make it.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as in FIG. 2 are indicated by the same reference numerals. In FIG. The means 6 and the operating terminal output processing means 4 are each constituted by an AND circuit, and the condition ignoring processing means 5 constitutes a 0)L circuit with the output signal of the plant interlock condition determining means 6 and the operating terminal corresponding condition ignoring signal. I try to do that.

Next, the operation will be explained. 1. Regarding the start/stop control of a certain operating end, the control computer system 1 determines the start/stop timing using the timing condition determining means 2, and determines the AND condition of the plant interlock based on the AND tarlock condition 3, in which all the timing conditions are AND. (The AND circuit of the operating end output processing means 4 outputs a start/stop command to the V operating end via the condition ignoring processing means 5 consisting of a circuit.

In addition, the plant interlock condition determining means 6 determines that some of the plant interlock conditions are not satisfied, that is,
When the AND condition is not satisfied, the operator sets the condition ignoring signal point number corresponding to the operating terminal, and the O circuit of the condition ignoring processing means 5 receives the setting signal and outputs it via the &j operating terminal output processing method 4. outputs start/stop commands to the operating end output.

Further, in the above embodiment, the case of the operation terminal for start-up/stop control of a thermal power plant was explained, but it may also correspond to a logic group such as breakpoint logic.
Even if the control computer system is a distributed computer system, the same effects as in the above embodiment can be achieved. Furthermore, a composite A plant consisting of a gas turbine and a steam turbine may be used, and the same effects as in the above embodiment can be obtained.

[Advantageous Effects of the Invention] As described above, according to the present invention, a circuit is configured with 0) corresponding to the operating terminal or a logic group, and the circuit configuration enables input of the condition ignoring signal 01' corresponding to the operating terminal, and Or, the amount of logic can be reduced by configuring the circuit to ignore the plant interlock conditions of the logic group all at once.
The system can be configured at low cost without losing the memory and calculation speed of the control computer system, and has the effect of ensuring safe operation.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a computer system for controlling a thermal power plant according to an embodiment of the present invention, and FIG. 2 is an operational flowchart of a conventional computer system for controlling. In the figure, 1 is a control computer system, 2 is a timing condition determining means, 3-stile plant interlock condition determining means, 4 is an operating terminal output processing means, and 5 is a condition ignoring processing means. Figure 1 Ma test force i jig force

Claims (1)

[Claims] The plant interlock condition of the plant interlock condition determination means using a logic diagram type programming tool and the condition ignore signal of the operating end corresponding condition ignore processing means corresponding to the plant interlock condition signal are configured with an OR circuit, and In the control computer system for starting and stopping a thermal power plant, the output signal of the timing condition determining means is inputted to the AND circuit of the operating end output processing means together with the output signal of the OR circuit to obtain the operating end output signal. The condition ignore signal corresponding to the operating terminal of the condition ignoring processing means set corresponding to each logic group of the plant interlock condition determining means is collectively input to the OR circuit together with the plant interlock condition of the operating terminal, 1. A computer system for controlling a thermal power plant, characterized in that when an interlock condition is satisfied, an operator can input a condition ignoring signal corresponding to the operating end.