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Double-fed wind turbine generator subsynchronous oscillation suppression method of broadband rotor additional damping

A doubly-fed wind turbine and sub-synchronous oscillation technology, which is applied in wind power generation, electrical components, circuit devices, etc., can solve the problems such as the inability to suppress sub-synchronous oscillation, achieve simplified calculation of phase compensation, wide frequency range, and easy engineering implementation Effect

Inactive Publication Date: 2018-07-24
NARI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a method for suppressing subsynchronous oscillation of doubly-fed wind turbines with additional damping of the broadband rotor, which can enhance the subsynchronous frequency band damping of doubly-fed wind turbines and reduce the frequency band of doubly-fed wind turbines. The risk of subsynchronous frequency band oscillation in wind farms, in order to partially solve the technical problem that the existing technology cannot suppress subsynchronous oscillation

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  • Double-fed wind turbine generator subsynchronous oscillation suppression method of broadband rotor additional damping
  • Double-fed wind turbine generator subsynchronous oscillation suppression method of broadband rotor additional damping
  • Double-fed wind turbine generator subsynchronous oscillation suppression method of broadband rotor additional damping

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0035] In order to achieve the purpose and effect of the technical means, creation features, work flow, and use method of the present invention, and to make the evaluation method easy to understand, the present invention will be further described below in conjunction with specific examples.

[0036] The invention provides a double-fed wind turbine subsynchronous oscillation suppressing method with additional damping of the broadband rotor, which can be implemented in the control of the double-fed wind turbine rotor side converter without adding hardware equipment, and is used to suppress double-fed wind turbines. Subsynchronous oscillations involving wind turbines.

[0037] The present invention will...

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Abstract

The invention discloses a double-fed wind turbine generator subsynchronous oscillation suppression method of a broadband rotor additional damping, which is implemented in control of a rotor-side converter of a doubly-fed fan and used for suppressing subsynchronous oscillation of a doubly-fed wind turbine generator; the three-phase currents of a double-fed fan rotator is detected; after the rotor current is detected, Park transform is performed on the three-phase currents to form a DQ axis system; filtering is performed by using a filter, sub-synchronous frequency band components of the rotor currents are extracted in real time, and then phase compensation and proportional amplification control is performed, the virtual additional rotor damping is added to an original converter DQ-axis rotor voltage control command. A control strategy of a fan rotor-side converter is changed to perform subsynchronous oscillation suppression, broadband additional damping control is increased on the rotor-side so as to enhance the damping characteristics of a subsynchronous frequency band of the wind turbine generator, the electrical damping of the whole wind turbine generator is enhanced, the subsynchronous oscillation of the system is suppressed; and the method can avoid additional devices, and is conductive to engineering implementation.

Description

technical field [0001] The invention relates to the technical field of electric power system and automation thereof, in particular to a method for suppressing subsynchronous oscillation of a doubly-fed fan by additional damping control of a broadband rotor. Background technique [0002] my country's wind energy resources and loads are distributed inversely. With the increase in the proportion of power electronic devices and renewable energy connected to the grid, the unique multi-scale control mechanism and low-inertia broadband response characteristics of power electronic conversion technology have significantly changed the dynamic characteristics of the power system. The problem of low-frequency oscillation and subsynchronous oscillation in the power grid connected to the new energy grid has become increasingly prominent. In recent years, subsynchronous oscillation in regional power grids involving wind turbines has occurred in many regions, causing large-scale wind turbine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/002H02J3/386Y02E10/76
Inventor 朱玲杨尉薇程雪婷刘新元郑惠萍刘福锁侯玉强李威王玉赵学茂黄锡芳
Owner NARI TECH CO LTD
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