Method for predicting longest execution time of control logic of coal-fired power plant

Abstract

The invention discloses a method for predicting the longest execution time of control logic of a coal-fired power plant. The method comprises the following steps: establishing a syntax tree of the control logic according to connection information of the control logic; calculating the longest execution time of a function block in the syntax tree, and obtaining the longest execution time of a root node in the syntax tree through recursive calculation according to the longest execution time of the function block; calculating the read-write time of each type of variable in the control logic; and adding the read-write time of each type of variable and the longest execution time of the root node in the syntax tree to obtain the longest execution time of the control logic. According to the method, reference data is provided for setting the operation cycle of the control logic, so that execution of the control logic in the set cycle is ensured, and normal operation of the decentralized control system of the whole coal-fired power plant is ensured.

Description

technical field [0001] The invention belongs to the technical field of decentralized control systems of coal-fired power plants, and specifically belongs to a method and system for predicting the longest execution time of control logic in coal-fired power plants. Background technique [0002] At present, thermal power plants mainly use Distributed Control System (DCS for short) to control the production process, among which the DCS software is an important part of the entire control system. The DCS software includes two subsystems, the engineer station and the operator station. The engineer station Mainly responsible for completing logic configuration and screen configuration, and completing the work of the control system design stage. The main process of logic configuration is control station management, hardware device configuration, IO variable configuration, and control logic configuration; the control station corresponds to one or A set of redundant controllers; the har...

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a method and system for predicting the longest execution time of the control logic of a coal-fired power plant, which solves the lack of the prediction and calculation function of the longest execution time of the control logic in the current smart coal-fired power plant. The operation period of the control logic depends entirely on its own experience, which makes it impossible to guarantee that the control logic can be executed within the set period, which affects the operation of the entire smart coal-fired power plant

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