A modeling and simulation method and device for a direct drive permanent magnet wind turbine

Abstract

The invention provides a modeling and simulation method and device of a direct-driven permanent magnet wind turbine generator set. The modeling and simulation method of the direct-driven permanent magnet wind turbine generator set comprises the steps of: constructing a wind turbine generator set model of the direct-driven permanent magnet wind turbine generator set; according to the wind turbine generator set model, simulating the direct-driven permanent magnet wind turbine generator set connected with a power grid, wherein the wind turbine generator set model comprises a wind turbine model, a three-order double-mass shafting model and a two-order propeller pitch angle control model; according to the relation between a generator rotating speed and a generator current, constructing a first one-order control model for generators, machine-side current transformers and a control system controlling the generators and the machine-side current transformers; constructing a one-order direct current capacitance model; according to the relation between a transformer direct current capacitance voltage and a wind turbine generator set active current, constructing a second one-order control model for a grid-side transformer and a control system thereof. According to the technical scheme provided by the invention, the operation characteristics of each structure in the wind turbine generator set are fully simulated, the e wind turbine generator set model has only eight orders, the calculation amount is reduced, and the simulation and analysis speed is improved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, and more specifically, to a modeling and simulation method and device for a direct-drive permanent magnet wind turbine. Background technique [0002] The direct drive permanent magnet wind turbine is a variable frequency constant speed wind turbine based on a permanent magnet synchronous generator and directly driven by the wind to generate electricity. The direct drive permanent magnet wind turbine is directly connected to the impeller and the generator for driving, which can ensure efficient operation. [0003] The complete direct-drive permanent magnet wind turbine model includes related models of multiple structures, which are calculated based on a large number of feature quantities, which increases the order of the equations in the model too much, even reaching more than a dozen or even tens of orders, resulting in For direct-drive permanent magnet wind turbines, the amount of...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a technical solution for the modeling and simulation of direct-drive permanent magnet wind turbines to solve the problem of the large amount of calculation and the slow simulation speed of the direct-drive permanent magnet wind turbine model in the prior art introduced in the background art. Slow and cannot accurately reflect the main operating characteristics of wind turbines

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