Parameter tuning method of damping controller of wind farm side based on wide area measurement system signal

A damping controller and wide-area measurement technology, which is applied in the direction of reducing/preventing power oscillation, etc., can solve the problems of not being able to effectively suppress low-frequency oscillations in the interval, and not being able to reflect the oscillation mode in the interval
CN102545247BInactive Publication Date: 2014-07-23SHANDONG UNIV +3
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2014-07-23
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a parameter tuning method of a damping controller of a wind farm side based on a wide area measurement system signal, and can effectively inhibit the interval low-frequency oscillation in a system, improve a transmission capacity of a call wire, replace a traditional synchronous generator PSS (Power System Stabilizator) and improve the voltage control. The parameter tuning method comprises the following steps of: 1) adding an excitation signal at the input end of the system and carrying out signal collection at the output end for system identification; 2) utilizing a Prony analysis method to carry out identification on a power transmission system containing a double-fed wind electric field and determining an open-loop transfer function which is not introduced with an additional damping control; 3) on basis of the step 2), utilizing a retention index to select a feedback signal utilized by the additional damping control and a mounting position of the additional damping control; and 4) on basis of the steps 2) and 3), utilizing the open-loop transfer function of the system to tune phase compensation link parameters in an additional damping control link; and drawing a root locus picture of a closed-loop transfer function and determining a gain value K of an additional damping controller.
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Description

technical field

[0001] The invention relates to a parameter setting method of a wind farm side damping controller based on a wide-area measurement signal, and belongs to the technical field of new energy (wind power) grid-connected stability control. Background technique

[0002] The goal of the additional damping control of the power system is to increase the damping torque of the system, so that the system will not experience periodic oscillation instability after being subjected to small disturbances. The main principle of additional damping control is to install damping controllers on electrical equipment (synchronous generators, high-voltage DC transmission equipment, flexible AC transmission equipment, wind turbines), so that electrical equipment can generate damping torque that suppresses low-frequency power oscillations of the system, and improve the inherent power of the system. dynamic stability.

[0003] As a new energy source, wind power generation will have an ...

Claims

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