Large-scale buried oil and gas pipeline GIC and PSP calculation method

Abstract

The present invention discloses a large-scale buried pipeline GIC and PSP calculation method of the direct current active circuit equivalent based on a generalized symmetrical component. The method comprises: Step 1, dividing the large-scale buried oil and gas pipeline equivalent circuit into multiple parts; Step 2, selecting one of the multiple parts of the large-scale buried oil and gas pipelineequivalent circuit, retaining the nonlinear circuit part, and using the active transformation of the active Y-Delta type connection circuit and the inverse transformation of the active Y-Delta type connection circuit to carry out equivalent circuit transformation on the rest of the large-scale buried oil and gas pipeline equivalent circuit to implement simplification, so that the high-order large-scale buried oil and gas pipeline equivalent circuit is transformed into a low-order buried oil and gas pipeline equivalent circuit; Step 3, using the loop current equation or the nodal voltage equation to solve low-order buried oil and gas pipeline equivalent circuit GIC and PSP; and Step 4, scanning and calculating each part of the large-scale buried oil and gas pipeline equivalent circuit respectively, and integrating calculation results of multiple parts to obtain a full large-scale buried pipeline GIC and PSP result. The technical scheme of the present invention solves the difficulty ofsolving large-scale buried oil and gas pipelines GIC and PSP with nonlinear circuits in the prior art.

Description

technical field [0001] The invention relates to the technical field of natural disaster prevention of buried oil and gas pipelines, in particular to a large-scale buried pipeline GIC and PSP calculation method based on a DC active circuit equivalent of a generalized symmetric component. Background technique [0002] Because the actual large-scale buried oil and gas pipelines criss-cross on site, the equivalent circuit will be intricate. In addition, the equivalent circuit affected by the geomagnetic storm is actively distributed. In this way, the equivalent circuit model of buried oil and gas pipeline network with distributed sources will be more complex, and the network scale is extremely large, which brings confusion to the calculation of buried oil and gas pipeline GIC and PSP. Traditionally, there are two ways to solve the problem: the loop current method and the node voltage method. In the loop current method, the study found that due to the large-scale characteristics...

AI Technical Summary

Problems solved by technology

However, the conventional DC circuit Y-△ type connection circuit conversion method solves the passive circuit problem

In the research on the conversion method of Y-△-type connection circuit in active DC circuit, the research shows that solving large-scale complex loop circuits encounters a difficult problem that cannot be solved by the "transformation method of Y-△-type connection circuit in active DC circuit".

So far, no specific solutions to this problem have been reported

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