Wind power system transient characteristic modeling and optimizing method based on amplitude-phase motion equation

Abstract

The invention discloses a wind power system transient characteristic modeling and optimizing method based on an amplitude-phase motion equation. The method comprises the steps of: firstly, establishing a four-machine two-region power system model; secondly, establishing a typical fan amplitude-phase motion equation model of a fan of a first generator based on the amplitude-phase motion equation, and enabling other generators to use a traditional thermal power generator model; thirdly, performing modeling on a grid-side component in a four-machine two-region power system through using an impedance method; and finally, feeding back an output current and a terminal voltage of current-limiting control to a phase error, so that the phase is more directly influenced by the terminal voltage and the current-limiting current, thereby optimizing a typical fan amplitude-phase motion equation model.

Description

technical field [0001] The invention belongs to the technical field of power system safety analysis, and more specifically relates to a method for modeling and optimizing transient characteristics of a wind power system based on amplitude and phase motion equations. Background technique [0002] Global warming, air pollution, environmental pollution and other issues are inevitable for traditional thermal power generation; even if these direct negative impacts on human beings and the earth are put aside, it is impossible to obtain the reserves of coal and other fuels used in traditional thermal power generation Inexhaustible. Regardless of whether it is from the perspective of green or sustainable development, it is necessary to accelerate the research on renewable energy and other new energy. Wind power is one of the more mature and potential ones. High wind power penetration rate is the development trend of energy saving, emission reduction and green energy. my country's w...

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Problems solved by technology

Changes in the power grid structure caused by system short-circuit faults require recalculation of the equivalent impedance model; the increase in power generation will also change the small-signal characteristics of the system. Equipment, inconvenient for impedance analysis

[0005] The first two models mainly rely on mathematical and structured ideas to model the electromechanical time scale of wind turbines. The electromechanical transient model obtained in this way can be easily implemented and applied in numerical simulation software, but it lacks the dual Physicalization and Generalized Abstraction of Electromechanical Scale Dynamic Characteristics of Wind-fed Turbine

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