Method for improving system damping and modeling based on double-fed fan rapid active power modulation

A technology of active power and doubly-fed wind turbines, applied in the field of power systems, can solve problems such as differential algebraic equations without mathematical models, complex converter control systems, and reactive power coupling.
CN110970925APending Publication Date: 2020-04-07GUIZHOU POWER GRID CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUIZHOU POWER GRID CO LTD
Publication Date
2020-04-07

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Abstract

The invention discloses a method for improving system damping and modeling based on double-fed fan rapid active power modulation. According to the method for improving the system damping, on the basisof an existing fan double-closed-loop control structure, the increment [delta][omega] of the angular speed of a generator is selected as an input signal of damping control, the increment [delta]P ofthe rotor power of a DFIG serves as an output signal and is added to a double-fed draught fan active power control loop to improve the damping of a system, and the dynamic behavior of the system is improved; the problems that in the prior art, the stability of a fan grid-connected system is researched, but a control system of a converter is complex and active and reactive coupling exists are solved; and the technical problems that a complete mathematical model does not exist, and a detailed differential algebraic equation set of the system is given exist.
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Description

technical field

[0001] The invention belongs to the technical field of power systems, and in particular relates to a method for improving system damping and modeling based on fast active power modulation of a double-fed fan. Background technique

[0002] As the penetration rate of wind power continues to increase, the access mode of wind power has changed from the original small-capacity distributed access to centralized large-scale access. Therefore, it is necessary to study the impact of a large number of wind turbines on the grid stability. When the proportion of wind energy in the system is large, its dynamic impact on the power system cannot be ignored. Therefore, it is of great significance to study the damping controller of the wind turbine to improve the stability of the power system. At present, wind turbines suppress the low-frequency oscillation of the power system mainly by adding damping controllers in the active power loop and reactive power loop. Many schol...

Claims

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