转态深调顺序控制功能在DCS系统的实现

Realization of Automatic Dry-wet Transition and Depth Peak Regulation Sequence Control Function in DCS

目前,“双碳”目标的提出已经把我国的绿色发展水平提升到一个新的高度,成为我国未来数十年内社会经济发展的主基调。火电机组深度调峰已经是大势所趋,从深度调峰的实际需求和可观的经济回报出发,迫切需要对火电机组进行超低负荷下深度调峰,干态转到湿态运行是机组超低负荷实现的主要手段,干态/湿态转换是十分复杂且稳定性较差的控制过程,而当机组运行到湿态工况时,机组被控对象动态特性的变化又十分显著,常规的控制策略根本无法对其进行有效的控制。旨在通过对辽宁清河发电有限责任公司9号机组自动干湿转态深度调峰顺序控制功能在DCS中的实现,总结出一套适用于火电机组自动干湿转态顺序功能控制策略。

At present, the double carbon target has promoted the green development of our country to a new height and become the main keynote of our country’s social and economic development in the next few decades. Based on the actual demand of deep peak load regulation and considerable economic returns, it is urgent to carry out deep peak load regulation for thermal power units under ultra-low load and to switch from dry state to wet state operation, which is the main means to realize ultra-low load operation for units. The dry-wet state transition is a very complex control process with poor stability, and when the unit operates in the wet state, the dynamic characteristics of the unitcontrolled object change remarkably, conventional control strategy can not control it effectively at all. The purpose of this paper is to realize the control function of automatic dry-wet state transition and depth peak regulation sequence control in DCS for Unit 9 of Qinghe Power Generation Co., Ltd., a set of sequential functional control strategy suitable for automatic dry-wet rotation of thermal power units is summarized.