Equivalent circuit-based steady-state modeling method for power spring-containing power distribution network

Abstract

The invention relates to the technical field of power electronics, in particular to an equivalent circuit-based power spring-containing power distribution network steady-state modeling method, which comprises the following steps of: establishing a topological structure corresponding to a power spring; analyzing the working mode of the corresponding power spring based on the topological structure of the corresponding power spring; based on the working mode of the corresponding power spring, establishing an equivalent circuit model of the corresponding power spring; and substituting the equivalent circuit model of the corresponding power spring into the steady-state equation of the power distribution network to construct a corresponding steady-state model of the power distribution network containing the power spring. According to the power spring-containing power distribution network steady-state modeling method based on the equivalent circuit, the power spring steady-state model can be equivalently processed, so that the power spring-containing power distribution network steady-state model can be effectively constructed to assist in analyzing the influence of the power spring on the power distribution network.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a steady-state modeling method for a power distribution network with springs based on an equivalent circuit. Background technique [0002] Against the background of global climate change, countries around the world have formulated energy transition strategies one after another, seeking the commanding heights of a new round of scientific and technological revolution and industrial transformation competition, and realizing the efficient, intelligent and safe use of new energy. The proportion of domestic renewable energy continues to increase, but with a large number of renewable energy power generation connected to the grid, it will cause a series of problems. Due to the intermittent and unstable characteristics of renewable energy, the imbalance between power generation and load demand has become increasingly prominent, affecting the operation safety of the power system ...

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Problems solved by technology

However, the existing schemes do not analyze the impact of electric springs on the distribution network from a macro perspective

At the same time, the steady-state model of the electric spring is a complex nonlinear equation with trigonometric functions. It is difficult to guarantee the efficiency and convergence of the solution problem by using the nonlinear programming model, which makes it difficult to substitute it into the steady-state model of the distribution network to participate in the analysis.

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