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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, applied in the direction of reducing/preventing power oscillation, which can solve problems such as the inability to reflect the interval oscillation mode and the inability to effectively suppress the interval low-frequency oscillation.

Inactive Publication Date: 2012-07-04
SHANDONG UNIV +3
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AI Technical Summary

Problems solved by technology

[0010] 1. Feedback control based on local measurement signals can only reflect the local oscillation mode, but not the interval oscillation mode. At this time, the additional damping controller cannot effectively suppress the interval low-frequency oscillation

Method used

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

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Embodiment Construction

[0082] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0083] (1) Use WAMS for signal acquisition and transmission

[0084] In the actual power grid, the wide area monitoring system (WAMS) can realize the real-time high-speed acquisition of the synchronous phase angle of the whole network and the main data of the power grid by gradually deploying the synchronous phase angle measurement unit (PMU) of the key measuring points of the whole network. The collected data is transmitted to the wide-area monitoring master station system in real time through the power dispatching data network, thereby providing real-time monitoring, analysis and calculation of the normal operation of the power grid and accident disturbances, and obtaining and mastering the dynamic process of the power grid operation. WAMS can obtain relative power angle, angular velocity, line power and other information between units within a certai...

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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.

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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Application Information

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IPC IPC(8): H02J3/24
Inventor 王洪涛刘玉田孙华东陈得治
Owner SHANDONG UNIV
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