General electromagnetic transient modeling method for direct-driven wind turbine generator

Abstract

The invention discloses a general electromagnetic transient modeling method for a direct-driven wind turbine generator, and relates to the technical field of simulation modeling of a power system. According to the method, low-voltage ride-through capability testing is carried out on a plurality of direct-driven wind turbine generators, voltage, current, active power and reactive power responses of the actual direct-driven wind turbine generators are obtained, a general electromagnetic transient response curve of the whole fault ride-through process of the direct-driven wind turbine generators is obtained according to the responses, the dynamic behaviors of the active power and the reactive power are analyzed according to the curve, and the behaviors are described; the reference value of the current active component and the reference value of the current reactive component are analyzed, and the obtained reference values are input into a current controller of a grid-side converter of the general electromagnetic transient simulation model of the direct-driven wind turbine generators; and step-by-step identification is adopted to identify the fault ride-through control parameters and the grid-side converter parameters of the direct-driven wind turbine generators. The method is mainly used for general electromagnetic transient modeling of the direct-driven wind turbine generators.

Description

technical field [0001] The invention relates to a general electromagnetic transient modeling method of a direct-drive wind turbine, belonging to the technical field of power system simulation modeling. Background technique [0002] The ever-increasing energy demand and increasingly severe environmental problems have greatly promoted the development of wind power generation. Direct-drive wind turbines have the advantages of high energy density and simple control methods, and are more and more widely used in onshore and offshore wind farms. However, as the penetration rate of wind turbines continues to increase, the integration of wind power into the grid has brought serious challenges to the safe operation of the power system. Establishing an electromagnetic transient model that can accurately reflect the fault ride-through characteristics of actual direct-drive wind turbines under voltage dips , it is of great significance to correctly evaluate the possible impact of large-...

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Problems solved by technology

[0004] The present invention is to solve the existing problem of lack of general electromagnetic transient modeling for the whole process of fault ride-through of direct-drive wind turbines

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