论文部分内容阅读
完成一次大型天然气管网运行方案优化预计需要数十小时的计算机运算时间,其中绝大部分时间用于压缩机组功率计算,基于此,提出利用拟合函数简化压缩机的功率计算,但该方法未考虑压缩机进口温度对功率的影响。为提高拟合精度,引入压缩机进口温度对拟合函数加以改进,并以国内某输气管道系统配置的3种型号压缩机为例检验其效果。结果表明:改进前的最大偏差在10%以上,而改进后的最大偏差低于5%,平均偏差低于1%。将改进的拟合函数应用于某虚拟管道的工艺运行方案优化过程,其结果与常规方法计算结果的绝对偏差低于0.67 MW,相对偏差低于1.1%,且拟合函数法比常规方法节省了大量计算时间。
To complete a large natural gas pipeline operation plan optimization is expected to require dozens of hours of computer operation time, most of which time for the compressor unit power calculation, based on which proposed to use the fitting function to simplify the compressor power calculation, but the method is not Consider the influence of compressor inlet temperature on power. In order to improve the fitting accuracy, the inlet temperature of the compressor is introduced to improve the fitting function. The effect of the three models of compressors with a domestic gas pipeline system is tested. The results show that the maximum deviation before improvement is more than 10%, while the maximum deviation after improvement is less than 5% and the average deviation is less than 1%. The improved fitting function is applied to the optimization of process operation plan of a certain virtual pipeline. The absolute deviation from the result calculated by the conventional method is less than 0.67 MW and the relative deviation is less than 1.1%. And the fitting function method saves more than the conventional method Calculate a lot of time.