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目前工业过程控制大都由功能分离的单回路模拟调节系统组成。随着以微处理器为核心的分布式集散装置在工业部门的推广应用,使探讨新型控制规律——大系统递阶优化理论在工程上的实现具备了可能条件。本文以火电厂单元机组的分解协调控制为例,提出了将大系统递阶优化理论应用于工程实际的关联测量分散控制方法,及采用分布式集散控制装置的实现方案。该方案使由模拟仪表实现的 PID 防调控制系统成为特例。本文简要分析了目前的前馈+反馈的控制方式与递阶关联控制的关系,讨论了用可编程控制器(PC)实现最优控制算法的一些问题。文中的结论还有待于今后在实践中检验和进一步完善。
At present, most of the industrial process control by the separation of single-loop analog control system components. With the popularization and application of distributed collection and distribution system with microprocessor as the core in the industrial sector, it is probable to discuss the new control law - the large-scale hierarchical optimization theory in engineering. In this paper, the disaggregation and coordination control of thermal power plant unit is taken as an example. A decentralized control method based on hierarchical optimization theory of large system is put forward and the realization scheme of distributed distributed control device is put forward. This solution makes PID PID control system realized by analog meter become a special case. This paper briefly analyzes the current relationship between feedforward + feedback control and Hierarchical Correlation Control, and discusses some problems of using Optimal Control Algorithm with programmable logic controller (PC). The conclusion in this paper needs to be further verified in practice in the future.