Oil gas pipe network leak detection method based on two-dimensional information fusion

Abstract

The invention provides an oil gas pipe network leak detection method based on the two-dimensional information fusion. The oil gas pipe network leak detection method includes the steps of obtaining the pressure, the flow, the density, the throttling valve opening degree, the download valve opening degree, water attack decompression valve switching signals and main delivery pump starting-stopping signals collected by monitoring stations of an oil gas pipe network in real time, judging whether oil gas pipe sections are abnormal or not, inquiring working condition adjustment information for enabling the oil gas pipe sections to be abnormal, starting to track negative pressure waves from the monitoring station where the working condition information is inquired, identifying the state of the oil gas pipe network, and positioning leak points of the oil gas pipe network. According to the complex working condition and the uncertainty of an oil gas pipe network system, in order to effectively lower the leak detection false alarm rate and improve the leak positioning accuracy, the two-dimensional fusion is adopted for the oil gas pipe network leak detection method to analyze the working state of the oil gas pipe network, and the accuracy of the leak detection of the oil gas pipe network can be improved; real-time change information of pipe parameters such as the pressure and the flow in the system and the working condition adjustment information of valves and the like are synchronously analyzed, and the leak detection false alarm rate is effectively lowered.

Description

technical field [0001] The invention relates to the technical field of oil and gas pipeline network leakage detection, in particular to a method for detecting oil and gas pipeline network leakage based on two-dimensional information fusion. Background technique [0002] Pipeline transportation of oil, natural gas and other energy products has been developed in China for more than half a century. With the expansion of pipeline network year by year, pipeline transportation has become the main way of land oil and gas transportation. However, the aging, corrosion, sudden natural disasters and man-made damage of the pipeline will all cause the leakage or even rupture of the refined oil pipeline. If it is not discovered and stopped in time, it will not only cause energy waste, economic loss, environmental pollution, but also endanger personal safety. , and even cause catastrophic accidents. Therefore, it is of great significance to carry out real-time online monitoring of oil and...

AI Technical Summary

Problems solved by technology

However, under the current pipeline network structure, complex working condition adjustments year by year, as well as different degrees of attenuation of pressure waves in the process of pipeline network propagation, have gradually increased the false alarm rate of leak detection, and may even occur within a day. There are cases of up to 10 false alarms

In order to ensure "no false negatives" in leak detection, most technicians will not choose to reduce false positives at the cost of reducing sensitivity and accuracy, so that too many false positives increase the waste of manpower and material resources

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