Damping control method of permanent magnetic direct-driven wind generating set

Abstract

The invention provides a damping control method of a permanent magnetic direct-driven wind generating set, and is used for improving transient-state stability of an electric network. The technical scheme is as follows: the damping control method comprises active damping control and reactive damping control, wherein the active damping control is realized by quickly adjusting the active output of the wind generating set and injecting damping power into the electric network according to the variation of the electric network frequency on the basis of maximum power tracking control policy, thereby further increasing the system damping; and the reactive damping control is realized by rapidly providing reactive power for the electric network by utilizing the net side convertor of the permanent magnetic direct-driven wind generating set according to the variation of the electric network frequency, thereby inhibiting system power oscillation. According to the invention, the characteristic of independent adjusting of active power and reactive power of the permanent magnetic direct-driven wind generating set is utilized, and the system damping is increased by active and reactive adjusting, thus the problem that the regional electric network with higher wind electricity permeability is lack of system damping is well solved, the transient-state stability of the electric network is improved and the safe and stable operation of the electric system is guaranteed.

Description

technical field [0001] The invention relates to a control method of a permanent magnet direct-drive wind power generator set, which can make the wind power set participate in the active and reactive power adjustment of the power grid when the grid power oscillates, suppress system oscillation, and improve the transient stability of the system , belongs to the field of control technology. Background technique [0002] The low-frequency oscillation of grid power has an important impact on the safe and stable operation of the power system, and for regional grids with a high proportion of wind power installed capacity, this problem will become more prominent. Although the power electronic converter isolates the influence of system power oscillation on variable-speed constant-frequency wind turbines, after the power grid is disturbed by faults, the fluctuation of wind power and the disconnection of wind turbines that do not have low-voltage ride-through capabilities will aggravat...

AI Technical Summary

Problems solved by technology

Although the power electronic converter isolates the influence of system power oscillation on variable-speed constant-frequency wind turbines, after the power grid is disturbed by faults, the fluctuation of wind power and the disconnection of wind turbines that do not have low-voltage ride-through capabilities will aggravate the regional power grid. The oscillating power borne by the internal synchronous generator is more likely to cause continuous oscillation of the system

However, at present, there is no ideal method for suppressing low-frequency oscillations for regional power grids with a high proportion of wind power installed capacity, which cannot guarantee the safe and stable operation of the power system.

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