摘要
针对复杂工况下输气管道的泄漏检测与定位准确率低、效率不高这一难题,结合等温定位法和Runge-Kutta法(龙格-库塔法)的原理及优缺点提出改进的变步长精细Runge-Kutta法。根据管道中的气体流动过程及温度的不同处理方式,以管道的温度、压力和流速为参数确定步长求得管道从首端到末端各截面的参数,通过测量管道首末端的流量和压力可判定出输气管道泄漏的位置。通过对非等温气体管道的仿真实验,以泄漏率和定位精度作为评价指标,对等温定位法和变步长精细Runge-Kutta法定位效果进行了对比分析。仿真结果表明,对于非等温气体管道的泄漏,变步长精细Runge-Kutta法的检测与定位精度准效率高。
To the problem of gas pipeline leak detection and location, combining the advantages and dis-advantages of isothermal localization method and Runge-Kutta method, according to the different treat-ment methods of the temperature, isothermal localization method and variable step precise Runge-Kutta method were compared and analyzed. Through simulation experiments of non-isothermal gas pipeline, leakage rate and positioning accuracy as the evaluation indexs, locating function of the two methods were compared and analyzed. Verification of field actual pipeline was conducted and simulation results show that for non-isothermal gas pipeline the positioning effect of variable step-size precise Runge-Kutta meth-od is better than the isothermal localization method.
出处
《电机与控制学报》
EI
CSCD
北大核心
2015年第1期107-112,共6页
Electric Machines and Control
基金
国家自然科学基金(61034005)
