基于PLC的船舶燃油锅炉启动控制方法

Research on start-up control method of marine oil-fired boiler based on PLC

传统船舶燃油锅炉启动控制普遍采用电子继电器触发接触控制器的方式,通过感应电路对启动指令进行接收,再由转发元件对数据进行信号转换、转发,最终由接触控制器执行控制指令。在此过程中,受到指令信号多次转换的影响,出现信号执行的瞬态误差,导致锅炉启动控制响应力下降,直接影响锅炉的启动成功率。针对问题产生原因,本文提出基于PLC的船舶燃油锅炉起动控制方法研究,基于PLC控制技术,引入CDGH二阶感应分析算法,对燃油锅炉启动数据信号进行点对点的优化计算分析,通过对指令传输过程曲线的分析,找到控制过程中的瞬态误差变量;根据得到的瞬态误差变量数据加入PLC控制硬件对误差变量进行硬件端修正,同时建立新的启动指令传输通道,实现新老硬件的数据对接;最后,通过仿真实验对提出的方法进行有效性验证,证明提出方法对解决燃油锅炉启动控制向应力下降问题,效果明显满足设计要求。

Traditional start-up control of marine oil-fired boilers generally uses electronic relays to trigger contact controllers.The start-up instructions are received by induction circuits,then the data are converted and forwarded by forwarding elements,and finally the control instructions are executed by the contact controllers.In this process,the transient error of signal execution occurs due to the influence of multiple conversion of command signal,which leads to the decrease of response force of boiler start-up control and directly affects the success rate of boiler start-up.Aiming at the cause of the problem,this paper puts forward the starting control method of marine oil-fired boiler based on PLC.Based on PLC control technology,CDGH second-order induction analysis algorithm is introduced to optimize the point-to-point calculation and analysis of the starting data signal of oil-fired boiler.Through the analysis of the command transmission process curve,the transient error variables in the control process are found.At the same time,a new start-up instruction transmission channel is established to realize data docking between the old and the new hardware.Finally,the validity of the proposed method is verified by simulation experiments,which proves that the proposed method can solve the problem of stress drop in the start-up control of oilfired boilers,and the effect obviously meets the design requirements.