Doubly-fed wind turbine generator parameter identification method

Abstract

The invention discloses a doubly-fed wind turbine generator parameter identification method. First, based on a simulation platform, a simulation system containing a doubly-fed wind turbine generator set is constructed; a three-phase short circuit fault is arranged at a doubly-fed wind turbine generator set port, active power and reactive power output by the doubly-fed wind turbine generator are used as outputs, track sensitivity of each parameter is calculated, and key parameters to be identified are determined; according to the shapes of track sensitivity curves, whether the key parameters to be identified can be distinguished and identified is judged; the doubly-fed wind turbine generator set port voltage amplitude and phase are used as inputs, the active power and reactive power output by the doubly-fed wind turbine generator set are used as outputs, an objective function of identification is established, and a particle swarm optimization algorithm is adopted to identify parameters of the doubly-fed wind turbine generator set; and finally, a final identification result of the parameters is obtained through a mean value method. The doubly-fed wind turbine generator parameter identification method provided by the invention comprehensively considers outlet voltage amplitude and phase angle change, and improves parameter identification precision.

Description

technical field [0001] The invention belongs to the field of power system modeling, and in particular relates to a parameter identification method of a doubly-fed wind power generator. Background technique [0002] Modeling is the basis of power system calculation, analysis and operation control. Reasonable and accurate wind turbine model parameters are particularly important for the correctness of the simulation analysis of electromagnetic transients and electromechanical transients in power systems. How to obtain wind turbine model parameters that are closer to reality is a research hotspot in power academia and industry. [0003] In the existing doubly-fed wind turbine parameter identification technology, generally only the amplitude change of the terminal voltage of the wind turbine is used as the input quantity. This method is only applicable to doubly-fed wind turbines directly connected to the infinite system. At this time, the outlet fault of the wind turbines only ...

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Problems solved by technology

However, there is no ideal infinite system in the actual system. When the double-fed wind turbine is connected to a general-scale power system, the phase jump of the port voltage is ignored during parameter identification, and the identification accuracy is poor.

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