Large-scale power distribution network integral model simplification method applicable to electromagnetic transient simulation

Abstract

The invention discloses a large-scale power distribution network integral model simplification method applicable to electromagnetic transient simulation. The large-scale power distribution network integral model simplification method comprises the following steps of: dividing a large-scale intelligent power distribution system into two parts, i.e., an external system and a research system; connecting the external system and the research system through a plurality of branches; establishing electromagnetic transient simulation models of the external system and the research system respectively; setting a low-dimension system model order q (q is less than n) according to a simulation actual demand and computing resource, wherein n represents order of the original external system model; selecting a base calculation method corresponding to the number of columns of a matrix B input in an external system state equation; performing re-orthogonalization processing on a base V by using a re-orthogonalization method; calculating that A' is equal to VTAV, B' is equal to VTB, C' is equal to CV and D' is equal to D to obtain a low-dimension simplified system model; and performing simulation computation in linkage with a detailed model of the research system in place of the original external system model to obtain a detailed transient process in the research system. According to the large-scale power distribution network integral model simplification method, the simulation calculation efficiency is increased, large-scale system analysis simulation is oriented, and inevitable choice of operation requirements under various on-line application scenes is met.

Description

technical field [0001] The invention relates to a method for simplifying the overall model of a power distribution network. In particular, it relates to an overall model simplification method for a large-scale power distribution network suitable for electromagnetic transient simulation for overall model simplification of a large-scale, complex structure and highly asymmetric power distribution network. Background technique [0002] Since modern times, electric energy has been one of the most effective ways of energy utilization. With the growing demand for energy and the increasingly prominent environmental problems of human economic and social development, the traditional centralized power generation method dominated by fossil fuels is being challenged, and the distributed power generation technology that can make full use of various new energy sources is receiving more and more attention. The wider the attention and application. Distributed power generation technology ma...

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Problems solved by technology

Although it is also possible to use detailed models to model external systems, when the scale of external systems is large, using detailed models to model and simulate them will bring a large computational burden, and in some cases it is even infeasible

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