论文部分内容阅读
随着天然气管网规模不断扩大,其拓扑结构越来越复杂,管网瞬态仿真过程所需的计算量及计算耗时都迅速增长。基于分而治之思想提出了一种简单高效的仿真方法:先求解天然气管网中各元件之间的连接点,进而将管网分解成若干条独立的管道,然后逐一求解每一条管道的水力参数和热力参数,连接点和管道的求解分别采用简单高效的共轭梯度和三对角矩阵算法。通过实例对比分而治之方法与SPS软件,结果表明:该方法计算精度与SPS软件相当;仿真速度与SPS软件处于同一量级,且超过SPS软件的1.5倍;对于管网规模的适应性与SPS软件相当,甚至当管网规模较大时,适应性更优。
With the continuous expansion of the natural gas pipeline network, the topological structure is more and more complicated, and the computational load and time consumption of the transient simulation of the pipeline network increase rapidly. Based on the idea of divide and conquer, a simple and efficient simulation method is proposed. First, the connection points between the components in the natural gas pipe network are solved, and then the pipe network is decomposed into several independent pipes. Then the hydraulic parameters and heat of each pipe are solved one by one The parameters, connection points and pipelines are solved using simple and efficient conjugate gradient and tridiagonal matrix algorithm respectively. The results show that the accuracy of this method is equivalent to that of SPS software; the speed of simulation is in the same order as that of SPS software and is over 1.5 times that of SPS software; and the adaptability to the scale of network is comparable to that of SPS software , Even when the pipe network is larger, the adaptability is better.