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Configuration method for achieving iterative computation function in distributed control system

A decentralized control system and iterative calculation technology, applied in the field of control, can solve problems such as difficult to implement mathematical calculation methods, and achieve the effects of convenient parameter setting, good convergence, and good control effect

Inactive Publication Date: 2012-08-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

But because of this, DCS configuration software omits logic functions such as loops and judgment jumps that are often used in computer programming languages, making it difficult for DCS configuration to implement some general mathematical calculation methods, such as iterative calculations, etc., which has become a limitation for advanced measurement. A threshold for the application of , control and analysis methods in DCS

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  • Configuration method for achieving iterative computation function in distributed control system
  • Configuration method for achieving iterative computation function in distributed control system
  • Configuration method for achieving iterative computation function in distributed control system

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Embodiment Construction

[0031] invention technical solution

[0032] The invention proposes a method for realizing iterative calculation by using a configuration mode in a distributed control system (DCS). This method designs a PID control loop for each nonlinear equation involved in iterative calculation, and transforms the whole iterative calculation process into a multi-loop control system.

[0033] Different from multivariate nonlinear equations in the pure mathematics sense, in engineering applications, the input and output variables of iterative equations have actual physical meaning. Therefore, the input variables are all real numbers and can only change within a certain legal range; the output variables have a real number solution, and the real number solution within its legal range is unique. This is a limitation of use of the present invention.

[0034] (1) Iterative formula sorting

[0035] The original multivariate nonlinear equation system contains n input variables, respectively: x ...

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Abstract

Disclosed is a configuration method for achieving an iterative computation function in a distributed control system, which is used for solving the problem of controlling in the distributed control system. The technical scheme includes that a proportional-integral-derivative (PID) control loop is designed for each of nonlinear equations involved in an iterative computation by a configuration software on data communication system (DOS), the whole iterative computation process can be transformed into a multiloop control system, and by adjusting parameters of a PID controller, the system is enabled to be stable and have no steady state deviation, thereby outputs of the control system are real solutions of the nonlinear equations. According to the configuration method for achieving the iterative computation function in the distributed control system, the iterative computation in the distributed control system is achieved. The method has the advantages of being simple in configuration, good in controlling effects and convergence, convenient to set the parameters, applicable to any DOS, and the like, so that the method is suitable for engineering technical personnel to use.

Description

technical field [0001] The invention relates to a method for realizing iterative calculation control through a configuration mode in a distributed control system, which belongs to the field of control technology. Background technique [0002] Distributed control system (DCS for short) has the advantages of high efficiency and reliable performance, and is widely used in industrial automation. Industrial enterprises such as large-scale thermal power plants, chemical plants, and steel plants use DCS to complete equipment status monitoring, process automatic control, and production. work on information management. [0003] In the last century, limited by the computing power of industrial computers in DCS, it was difficult for DCS to complete complex mathematical calculation tasks. In order to ensure the real-time performance of data processing, many occasions involving complex mathematical calculations use simplified formulas, multi-point polyline fitting, and look-up tables to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 田亮刘鑫屏苏保光
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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