论文部分内容阅读
针对天然气开采后期,采出气中H2S含量高,气量波动大,导致脱酸系统负荷增加,同时,现有控制方案在原料气参数变化较大的情况下,系统的缓冲性和可控性较差,对扰动的调节时间较长。因此,本文通过继电反馈测试方法求取脱酸气系统低阶带时滞的传递函数模型(FOPDT),并在此基础上关联系统的扰动变量、输入变量与输出变量以得到传递函数矩阵,通过计算静态增益矩阵与动态增益矩阵,以确定最佳的控制回路配对,并对提出控制回路配对方案作扰动成本分析,考察控制系统系统的缓冲性,最后通过Aspen Dynamics进行动态模拟,以验证控制方案的可靠性。动态模拟表明,相对于以往的控制方案,系统具有较好的抗扰动能力和缓冲性,在原料气参数发生变化的情况下,脱酸气系统能够迅速做出调整,使被控变量能够恢复到设定值。
For the later period of natural gas exploitation, the H2S content in the produced gas is high and the fluctuation of the gas volume is large, which leads to the increase of the load of the deacidification system. Meanwhile, the existing control scheme has poor buffering and controllability under the condition that the raw material gas parameter changes greatly , The regulation of disturbance longer. Therefore, in this paper, the low-order transfer function model (FOPDT) with time-delay of the deacidification gas system is obtained by the relay feedback test method. On the basis of this, the perturbation variables, input variables and output variables are correlated to get the transfer function matrix, By calculating the static gain matrix and the dynamic gain matrix to determine the optimal control loop pairing, the proposed control loop pairing scheme is used to analyze the perturbation cost, investigate the buffer performance of the control system, and finally, the dynamic simulation is carried out by Aspen Dynamics to verify the control Program reliability. The dynamic simulation shows that the system has better anti-disturbance ability and cushioning performance than the previous control scheme. When the parameters of the feed gas change, the deacidification system can make rapid adjustments so that the controlled variable can be restored to Setting value