Natural Gas Pipeline Operation Optimization Model And Its Optimization Method

As a clean and high-quality energy, natural gas will be greatly exploited and utilized fully in China at this century. Natural gas is mainly transported to users through pipeline. With the rapid development of natural gas industry of China, the pipe industry is developing very fast as well. In recent years, both the scale of nature gas pipeline networks and the number of natural gas user expanded. How to guarantee the pipeline networks economic, safely and rational operation becomes an important problem for natural gas pipeline managers. One good operation scheme can not only guarantee pipeline system operation, user's regular production and life, but also cut down a great deal operation cost.In recent years, natural gas pipeline optimized operation researcher's key direction is the natural gas transmission pipeline optimized operation model about decreasing energy consuming. But little has been done about others optimization models such as the maximum benefit optimization model and maximum gas volume optimization model of natural gas pipeline network. Therefore, this paper focused on how to optimize operation scheme of nature gas pipeline network system, this paper develops steady-state optimized operation model of nature gas pipeline network system and dynamic-state optimized operation model of nature gas pipeline network system. On the base of contrasting relative merits of different kinds of optimization algorithms, optimization algorithms to solve nature gas pipe network system optimized operation models are introduced and developed. Some optimized schemes can instruct nature gas pipeline network system's routine dispatching and management to increase nature gas pipeline network system economic benefit and fully utilize pipeline network system transportability.This paper's main work are as follows:(1) Based on nature gas pipeline network system steady-state simulation model, steady-state optimized operation model of nature gas pipeline network: system is developed;(2) By contrasting relative merits of different kinds of existing optimization algorithms, improved linearized algorithms improved complex algorithms and hybrid genetic annealing algorithms are introduced to solve nature gas pipe network system steady-state optimized operation model;(3) Two hybrid algorithms are developed: hybrid annealing complex algorithms and hybrid genetic complex algorithms. By solving nature gas pipeline network system steady-state optimized operation model, feasibility and convergence of hybrid annealing complex algorithms are proved; By solving PID parameter setting model, feasibility and convergence of hybrid genetic complex algorithms are proved;(4) Dynamic-state optimized operation model of nature gas pipe network system is developed, and improved linearized algorithms is adopted to solve the dynamic-state optimized operation model;(5) Based on PID and control valve's principle of operation, this paper researches and analyses nature gas pipeline network system's control system and centrifugal compressor surge-free control;(6) Conclusions and future work.