JPH0644201B2 - Computer system for control of thermal power plant - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a computer system for controlling a thermal power plant for controlling start / stop of the thermal power plant.

[Conventional technology]

FIG. 2 is, for example, Electrical Review, June 1984 (P. 50).
9 to 516) Utilization status of computers in thermal power plants, conventional computer system for control by plant table system programming shown in "Automation technology of start-stop operation". In the figure, 1 is various analog controls. , A control computer system for integrally controlling digital control and sequence control, 2 is a timing condition determining means for determining the start / stop timing of the operating end, 3 is a plant interlocking condition determining means for determining the plant interlocking condition of the operating end Reference numeral 4 is an operation end output processing means for outputting to the operation end, and 5 is a condition disregard processing means for accepting the operator's condition disregard.

Next, the operation will be described. First, in the control computer system 1, the start / stop timing of the start / stop control of a certain operating end is determined by the timing condition determination means 2, and if the timing condition is satisfied, the plant interlock condition determination means 3 is used. Then, it is determined that the plant interlock condition is satisfied, and when all the conditions are correct, the operating end output processing means 4 outputs a start / stop command to the operating end. When part of the plant interlock conditions is not satisfied by the plant interlock condition determination means 3, the operator sets the individual point numbers of the unestablished plant interlock conditions to the condition disregard processing means 5, and the processing is performed. As a result, the operating end output processing means 4 outputs a start / stop command to the operating end.

[Problems to be solved by the invention]

Since the conventional computer system for controlling the thermal power plant is configured as described above, when the programming means of the logic diagram system is applied, the condition ignoring processing means 5 corresponding to each condition signal of the plant interlock condition 5 The condition ignoring signal must be configured in the OR circuit, and when the amount of logic in the plant is large, the memory requirement of the control computer system naturally increases and the calculation speed also takes time. .

The present invention has been made in order to solve the above-mentioned problems, and a logic amount is configured by collectively configuring an OR circuit in which the condition ignore signal set for the operating end is preliminarily set in the plant interlocking condition of the operating end. It is an object of the present invention to obtain a computer system for controlling a thermal power plant that does not increase.

[Means for solving problems]

In the computer system for controlling a thermal power plant according to the present invention, the condition-ignoring signal set corresponding to the operating end is collectively configured with the plant interlocking condition at the operating end to form the OR circuit, so that the plant interlocking condition at the operating end is not This allows the operator to ignore the condition when it is established.

[Action]

The condition ignoring signal of the interlock condition set to correspond to the operating end of the control computer system for starting and stopping the thermal power plant according to the present invention makes it easy for the operator to ignore the condition when the plant interlock condition at the operating end is not satisfied. To do.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the figure,
The same parts as those in FIG. 2 are shown with the same reference numerals as the first part.
In the figure, the figure shows a specific configuration of the control computer system 1, in which the timing condition determining means 2, the plant interlock condition determining means 3, and the operating end output processing means 4 are each configured by an AND circuit, The ignore processing means 5 constitutes an OR circuit with the output signal of the plant interlock condition determining means 3 and the operating-end corresponding condition ignore signal.

Next, the operation will be described. First, the control computer system 1 judges the start / stop timing of the start / stop control of a certain operating end by the timing condition judging means 2, and if all the timing conditions satisfy the conditions of the AND circuit, the next step is the plant interlock. The AND condition of the plant interlock is judged according to the condition 3, and the AND of the operating end output processing means 4 is performed via the condition ignoring processing means 5 composed of the OR circuit.
The circuit outputs start / stop commands to the operating end. Further, a part of the plant interlock condition is not satisfied by the plant interlock condition determination means 3, that is, AND
When the condition is not satisfied, the OR circuit of the condition ignoring processing means 5 receives the setting signal by setting the condition ignoring signal point number set by the operator corresponding to the operating end, and outputs the operating end via the operating end output processing means 4. The start / stop command is output to.

Further, in the above embodiment, the case of the operating end of the start / stop control of the thermal power plant was described, but it may be a logic group correspondence such as a break point logic,
Even if the control computer system is a distributed configuration computer system, the same effect as that of the above embodiment can be obtained. Further, it may be a combined power generation plant composed of a gas turbine and a steam turbine, and the same effect as that of the above-described embodiment is obtained.

〔The invention's effect〕

As described above, according to the present invention, the OR circuit is formed corresponding to the operating end or the logic group and the operating end corresponding condition ignore signal is set to O.
Since the circuit is configured so that input is possible with the R circuit configuration and the plant interlocking condition of the operating end or the logic group is collectively ignored to reduce the logic amount, the memory and operation speed of the control computer system are lost. Without this, there is an effect that the system can be configured at low cost and reliable safe operation can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram of a control computer system for a thermal power plant according to an embodiment of the present invention, and FIG. 2 is an operation flow chart of a conventional control computer system. In the figure, 1 is a control computer system, 2 is a timing condition judging means, 3 is a plant interlock condition judging means, 4 is an operating end output processing means, and 5 is a condition ignoring processing means.

Claims (1)

[Claims] 1. An OR circuit for a plant interlock condition of a plant interlock condition determining means using a logic diagram programming tool and a condition ignore signal of an operating end corresponding condition ignore processing means corresponding to the plant interlock condition signal. For controlling the start and stop of the thermal power plant by inputting the output signal of the timing condition determination means together with the output signal of the OR circuit to the AND circuit of the operating end output processing means to obtain the operating end output signal. In the computer system, the operating end corresponding condition ignoring signal of the condition ignoring processing means set for each logic group of the plant interlocking condition determining means is input to the OR circuit together with the plant interlocking condition of the operating end, When the plant interlock condition for the operating end is satisfied, the operator does not have a corresponding condition for the operating end. Control computer system for thermal power plant, characterized in that to enable an input operation signal.