A Wind Turbine Simulation System Based on Doubly-fed Asynchronous Generator

Abstract

The invention relates to a wind turbine unit simulation system based on a doubly-fed asynchronous generator. The wind turbine unit simulation system comprises a variable-pitch controller, a two-way pulse width modulation frequency converter, a power grid dispatching analog controller, a wind turbine simulator, a dragging frequency converter, a variable-frequency asynchronous dragging motor and the doubly-fed asynchronous generator. According to the simulation system, maximum power output can be automatically achieved along with the wind speed change under coupling control of the variable-pitch controller and a controller of the doubly-fed asynchronous generator; active or reactive output required by a power grid can be automatically simulated through the power grid dispatching controller, or a power curve of a wind turbine unit is manually adjusted to manually simulate power grid dispatching; a gain table of a pitch angle PI controller can be manually changed through the power grid dispatching controller; experiment personnel can have a deep understanding of the response process of a wind power generation system to different gains and different forms of power grid dispatching through a display unit in the power grid dispatching controller.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind turbine simulation system based on a doubly-fed asynchronous generator. Background technique [0002] As an effective form of renewable energy utilization, wind power has attracted more and more attention in recent years. Through the on-site verification of the operation of the wind power generation system, the control strategy and system software and hardware of the wind power generation system can be verified, and then adaptive adjustments can be made. However, a large number of on-site verifications need to consume more manpower and material resources, and some verification projects such as the response of wind farms to grid dispatching are difficult to carry out at the wind power generation site. At present, the wind power generation laboratory simulation system is usually used to simulate and verify the wind power generation system. [0003] The wind p...

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Problems solved by technology

[0004] The above-mentioned simulation test method can simulate conventional characteristics such as fan aerodynamic characteristics (tracking torque-speed curve), MPPT control, pitch angle control, etc., but the response characteristics, stability and grid-connected power quality of the wind power generation system when responding to grid dispatching, etc. The problem is not involved and cannot accurately reflect the characteristics of the actual entire wind power generation system

Moreover, the debugging of the system control algorithm is not flexible, and there is no intuitive feeling of change after the algorithm is changed, which is not conducive to the experimenters' mastery of the control process and control algorithm of the wind turbine

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