船用冷凝器凝水温度控制建模和PID控制系统设计

Modeling of Condensate Temperature Control and Design of PID Control System for the Marine Condenser

船用冷凝器是蒸汽动力装置的重要组成部分,凝水过冷度与水中含氧量密切相关。为了对凝水温度实施有效的控制,结合理论分析和试验数据,建立了一种简化的凝水温度控制模型,并设计了凝水温度PID控制系统。采用试验数据对模型的有效性和控制系统的控制效果进行了验证。结果表明,模型运算结果与试验数据具有较好的符合性,控制系统可以有效地将凝水温度控制在规定的范围内。该模型建立方法和控制系统设计方法可为其他控制系统分析和设计提供借鉴。

Marine condenser is an important equipment of steam power plant,condensate subcooling is closely related to oxy⁃gen content in water.In order to effectively control the condensate temperature,a simplified mathematic model of condensate tem⁃perature control is established by combining theoretical analysis and practical data,and a PID control system is designed.The validi⁃ty of the model and the effectiveness of the control system is verified by practical data.The results show that this model is in good agreement with the practical data,and the control system can effectively control the condensate temperature in the specified range.The method of model establishment and control system design can provide reference for other control system analysis and design.