Active control method of doubly-fed wind turbine generator set

Abstract

The invention provides an active control method of a doubly-fed wind turbine generator set. The method comprises the following steps that step 1, a wind power plant active control system issues an active power instruction Pgive to the doubly-fed wind turbine generator set; step 2, the actual rotating speed Omega r of the doubly-fed wind turbine generator set is measured, the control modes of the doubly-fed wind turbine generator set are switched, and the active power reference value Pref of the doubly-fed wind turbine generator set is set as different power values according to the control modes; step 3, the maximum operation rotate speed pitch angle control system of the doubly-fed wind turbine generator set is set to adjust the pitch angle based on the comparison value of the actual rotating speed Omega r and the maximum operation rotate speed, and therefore the stable operation of the doubly-fed wind turbine generator set is controlled. Compared with the prior art, the active control method of the doubly-fed wind turbine generator set guarantees flexible switching of the active power control modes of the doubly-fed wind turbine generator set under various wind power input conditions, guarantees stable operation, and plays a pivotal supporting role for the wind power plant to participate in management and running of an electrical power system.

Description

technical field [0001] The invention relates to a control method of a wind turbine, in particular to an active power control method of a doubly-fed wind turbine. Background technique [0002] With the continuous increase of installed capacity of wind farms, it is the development trend of wind power grid-connected operation to realize controllable operation of large wind farms. The existing national standards and enterprise specifications for wind farms have made relevant requirements on the active power control capabilities of wind farms; the key to realizing the active power control of wind farms is to complete the active power control of wind turbines; among them, the existing wind power Generating units (mainly referring to variable-speed doubly-fed wind turbines and permanent magnet direct-drive wind turbines) generally adopt the maximum power tracking autonomous power generation operation mode, which is difficult to meet the requirements of wind farm active power contro...

AI Technical Summary

Problems solved by technology

Although some wind farms already in operation in China also carry out active power control, they mainly disconnect or connect the wind turbines on the entire feeder line by artificially switching the switch of a certain feeder line. This control method is relatively rough and difficult to achieve. Accurate control of active power of wind turbines in wind farms

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