Study On Key Technique Of Crude Oil Transport Pipeline Leakage Detection Based On SCADA System

Maintaining pipelines' safe run and preventing from pipeline leakage accidents have become one of the important tasks of pipeline industry manufacture and management departments. Pipeline leakage accidents not only cause great loss of material, but also pollute the environment; what's more, it may lead to serious casualty. Pipeline leakage accidents occur frequently in recent years. In order to guarantee the pipelines work safely and minimize the losses caused by leakage accidents, the pipeline leakage detection and localization system has become an important part of SCADA system. Pipeline leakage detection is a multi-field object, which involved many subjects, such as sensor technology, subtle signal detection and signal processing. At the present time, SCADA system and pipeline leak detection system are used widely in our country crude oil pipeline transport. But these two systems are independently and each has a style in one's own. How to realize these two systems integrated to share the resources are discussed in this paper, and a set of pipeline leakage detection and localization system based on SCADA system is developed. The main efforts accomplished can be summed up as the following aspects:1. The method of pipeline leakage detection is introduced. And key techniques of crude oil transport pipeline leakage detection based on SCADA system are studied, such as data acquisition, data communication, and noise processing. 2. It is necessary to adjust the hardware and software of the Qin-Jing crude oil pipeline SCADA system. On condition that the initial SCADA system runs normally, solve the interface problems of the two systems, and provide the qualified data need by pipeline leakage detection and localization system.3. With signal preprocessing method, the signal quality and capacity of capturing the pressure waves' small change are also improved.4. Software of pipeline leakage detection and localization system based on SCADA system is designed with virtual instruments technology. The software part of the system consists of seven modules: data communications module, leakage judgement and alarm module, leakage localization modules, history data analysis module, information memory module, parameter setting module, and program exiting module.5. Experiments and practical run demonstrated the system well effect.