Abstract
Pipeline leakage of crude oil, refined oil or other petroleum derivatives can cause serious damage to the environment, soil, and more importantly, pose a serious threat to personal safety. The losses can be minimized to a degree by active control. Therefore, timely and effective control measures should be taken to minimize the leak volume whenever a pipeline leaks. However, the complexity of pipeline hydraulic systems makes it difficult to optimize control schemes for pipeline hydraulic devices under leak conditions, and existing studies rarely consider complex transient processes. This paper aims to establish a mixed integer linear programming model considering transient processes, hydraulic constraints, equipment constraints and flow constraints, and develop a detailed control scheme of the devices by the branch and bound algorithm. Moreover, it is the objective of the model to figure out the most optimal control plan to minimize the leakage. Experiments on a real-world liquid pipeline have proved the practicability and high reliability of the model.
Highlights
Thethe cut-off valvewill actuator a pipeline senses the pressure drop is larger theWhen setting, actuator close of the pipeline senses that the pressure drop rate is larger than the setting, the actuator will close the upstream upstream and downstream cut‐off valves to promise the influence of pipeline rupture and control and downstream cut-off valves to promise influence of pipeline rupture and control the leakage the leakage between the two adjacent valves.the
The closure rate influences the transient pressure caused between the two adjacent valves
The basic parameter of a liquid pipeline adopted for test is presented in Table 1 and Figure 1
Summary
Pipelines have become the main way of liquid transportation because of their advantages in economy and transportation capacity [1]. During the long-term operation of pipelines, they inevitably leak due to corrosion, third-party destruction and natural disasters, causing environmental contamination, fires or explosions if measures are not taken in a timely way [2,3,4]. In addition to the research on leak detection and hydraulic simulation, the control of hydraulic equipment is critical to reducing leak volume. Difficulties in this research are mainly transient flow characteristics, the interactions between hydraulic devices, phase transitions and non-linear constraints
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