Wind power frequency modulation control method suitable for high wind power penetration level

Abstract

The invention provides a wind power frequency modulation control method suitable for a high wind power penetration level, and relates to the field of wind power generation grid connection, and the method comprises the following steps: monitoring the frequency of a power grid in real time, calculating the instantaneous frequency of the power grid, and when the frequency deviation of the power grid exceeds a set dead zone range due to the disturbance of a power system, measuring the rotating speed of a fan, and when the rotating speed omega r of a fan rotor is larger than the allowable minimum rotating speed omega min, starting a virtual inertia control module of the doubly-fed wind turbine generator, wherein the fan actively participates in frequency modulation; calculating the active increment of the wind turbine generator; calculating the equivalent active power increment of the time domain; calculating an active reference value of the fan; and after the time delta t, gently switching the active power output of the fan to the maximum power tracking output power, so the rotating speed gradually recovers to the initial state. A virtual inertia control link is additionally added to a wind turbine generator rotor side converter controller, when the power grid frequency exceeds the limit due to disturbance, the virtual inertia control link participates in frequency modulation of a power system by use of the rapid throughput of kinetic power of the fan rotor, the frequency modulation response is faster, and the effect is better.

Description

technical field [0001] The invention relates to the field of grid-connected wind power generation, in particular to a wind power frequency modulation control method suitable for high wind power penetration levels. Background technique [0002] With the depletion of oil and other non-renewable energy reserves and the deteriorating environmental problems, in recent years, new energy power generation has developed rapidly with the advantages of cleanness, low carbon, and high efficiency. Traditional thermal power is gradually being replaced, and the structure of my country's power system is gradually becoming Transformation of new power system with new energy as the main body. Among them, the development of wind power is particularly rapid, mainly because the doubly-fed wind turbine has the advantages of decoupling control of active and reactive power, maximum power tracking control, and small size. Decoupling from the frequency of the power grid causes the advantage of the fan...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a wind power frequency modulation control method suitable for high wind power penetration level, in order to solve the problem of the secondary frequency drop caused by the wind power unit speed recovery after the frequency response in the prior art

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