Cathode protection potential follow-up control system under oil and gas intelligent pipeline architecture

Abstract

The invention provides a cathode protection potential follow-up control system under an oil and gas intelligent pipeline framework. Comprising an intelligent test pile RTU (remote terminal unit), a communication base station, a cloud server, a station control system of an SCADA (supervisory control and data acquisition) system and a cathode protection potentiostat. All the devices work cooperatively to form a cathode potential follow-up control system, and an intelligent development framework of comprehensive sensing, data intercommunication, auxiliary decision making and intelligent management and control is achieved. The method comprises the following steps: acquiring parameter information such as potential, current, environment temperature and humidity, corrosion rate and soil parameters (moisture content, PH value and oxygen content) at a test pile along an oil and gas pipeline, fusing multi-parameter data, establishing an optimization model, dynamically optimizing, determining an optimization value of the current pipeline cathode protection potential, controlling the output of a cathode protection potentiostat, and determining the cathode protection potential of the pipeline. The protection reliability is greatly improved, manpower and material resources are saved, and the problems that dead zones exist in cathode protection, pipeline parameters cannot be monitored in real time and the like are solved.

Description

technical field [0001] The invention relates to a cathodic protection system for a buried long-distance pipeline, in particular to a cathodic protection potential follow-up control system under the framework of an oil and gas intelligent pipeline. Background technique [0002] Cathodic protection technology is the most economical and effective protective measure in the corrosion control of oil and gas long-distance pipelines. It can effectively slow down the corrosion rate of oil and gas pipelines and prolong their service life when used in conjunction with the surface anticorrosion layer of the pipeline. It is widely used in the field of pipelines. my country's main oil and gas pipelines adopt the cathodic protection method with the main applied current and the sacrificial anode as the supplement. instrument) compares the detected reference electrode signal with the given potential of the cathodic protection potential, and according to the potential comparison result, the c...

AI Technical Summary

Problems solved by technology

However, under the interference of factors such as soil temperature and humidity around the pipeline (especially over 40°C), pH value, and AC stray current, there will be a large error in the cathodic protection potential set according to the cathodic protection potential setting criteria, and the result It is because many pipelines that are operated under cathodic protection in accordance with the guidelines have been over-protected or under-protected, causing major safety hazards

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