A Wind Farm Equivalent Modeling Method Applicable to Electromagnetic Transient Simulation

Abstract

The invention provides a wind farm equivalent modeling method suitable for electromagnetism transient simulation and belongs to the field of power system modeling.On the aspect of power part equivalence, a wind speed equivalent method is improved, and a maximum wind power tracking curve obtained after equivalence is adjusted; besides, change of wind wheel radius obtained after equivalence is considered, and the equivalent unit gearbox variable ratio is adjusted; on the aspect of electrical part equivalence, a capacity weighting method is adopted to conduct equivalence on electric generator parameters, and the situation that units of different trunk lines may be classified into the same generator cluster is considered; on the aspect of control parameter equivalence, the situation that parameters of an equivalent unit change is considered, reference to an engineering design method for single machine control parameters is made, and an equivalent machine controller parameter tuning formula capable of maintaining performance before equivalence and after equivalence unchanged is obtained.The wind farm equivalent modeling method suitable for electromagnetism transient simulation has the advantages that the defects that an existing wind farm equivalent modeling method is large in error, complex in model, poor in working condition adaptability and the like are overcome, and the calculation method of equivalent parameters are improved on the aspects of power, electricity and control.

Description

technical field

[0001] The invention belongs to the field of power system modeling, in particular to a wind farm equivalent modeling method suitable for electromagnetic transient simulation. Background technique

[0002] The wind farm equivalent model is an important tool for researchers and operators to analyze the power system including wind farms, and it is of great significance to power grid dispatching and safe and stable operation of the power grid. If there is a large error between the simulation results of the wind farm equivalent model and the measurement results of the actual wind farm, when this model is applied to the power system analysis, researchers may draw wrong conclusions, or operation managers may make wrong conclusions. Operations threaten the safety and stability of the power grid, and in severe cases cause regional power accidents, which have a serious impact on the safety of national electricity use, economic development and normal life in the region....

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