Control method for stably operating wind power field using double-fed asynchronous generator

Abstract

The invention relates to a control method on stable operation for wind electric field of double-fed asynchronous generator which belongs to technology field of power supply. Its steps are: (1) in the electric system of wind electric field containing double-fed asynchronous generator, multiple wind generating sets are equivalent to one wind generating set with constant power. Condenser is linked to the terminal of the wind generating set to compensate reactive power in steady state. Simultaneously, synchronizing generator and double-fed asynchronous generator are connected with the high-pressure side of the wind generator through Delta / Y transformer separately. (2) rotor current control of double-fed asynchronous generator: rotor current of the double-fed asynchronous generator is confirmed by AC slip frequency. Based on controlling the rotor current, the amplitude and displacement of its stator and the output active or reactive work of the double-fed asynchronous generator are controlled, which will stabilize the output of the wind electric field. The invention can minimize the influence on stable operation of electric system after introducing the wind electric field.

Description

technical field [0001] The present invention relates to a method for controlling the stable operation of a wind farm in the technical field of power supply, in particular to a method for controlling the stable operation of a wind farm using a doubly-fed asynchronous generator (DASM), which solves the problems caused by the connection of the wind farm to the power grid. question. Background technique [0002] In recent years, wind power generation has been widely and highly valued. The number of new wind farms has been increasing and the scale is also expanding. The proportion of wind power generation in the power grid is increasing, which is bound to affect the stable operation of the existing power grid to a large extent. [0003] In the prior art, it is proposed to use a capacitor bank to improve the transient stability of the wind power generation system, but the capacity of the capacitor is fixed. When the output of the wind turbine changes, the reactive power provided ...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a wind farm stable operation control method using double-fed asynchronous Doubly-fed asynchronous generators help to provide reactive power compensation for wind turbines in steady state, maintain stable performance of wind turbines under large electrical disturbances, and maintain wind turbines at Stable performance in harsh wind conditions

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