Method and device for suppressing subsynchronous resonance of double-fed induction generator-series compensation power transmission system

A sub-synchronous resonance, doubly-fed fan technology, applied in the field of electric power, can solve problems such as easy to cause system resonance and difficult to realize, and achieve the effect of enhancing control and suppressing sub-synchronous resonance

Active Publication Date: 2017-05-31
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology

However, the existing suppression methods are not easy to implement, and the modulation of active power can easily lead to system resonance; in addition, from the perspective of power grid planning, it is also necessary to evaluate the risk of subsynchronous resonance in wind power, and it is necessary for wind turbines to be able to suppress subsynchronous resonance. In-depth research on suppression measures by wind turbine angle

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  • Method and device for suppressing subsynchronous resonance of double-fed induction generator-series compensation power transmission system
  • Method and device for suppressing subsynchronous resonance of double-fed induction generator-series compensation power transmission system
  • Method and device for suppressing subsynchronous resonance of double-fed induction generator-series compensation power transmission system

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[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0043]Aiming at the problem of subsynchronous resonance in the wind power-series compensation transmission system, the subsynchronous resonance suppression method of the doubly-fed wind turbine-series compensation transmission system of the present invention creatively finds that the PIR controller can enhance the control of the resonant frequency point of the controller, and combine it Introduced into the control of the rotor converter in the double-fed fan-series compensation transmission system, the PIR control system of the rotor grid-side converter is designed to ...

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Abstract

The invention provides a method and a device for suppressing subsynchronous resonance of a double-fed induction generator-series compensation power transmission system. The method includes converting a subsynchronous frequency component under a stationary coordinate of current of the double-fed induction generator-series compensation power transmission system into a DQ coordinate subsynchronous frequency component; setting resonance frequency points of a proportional-integral resonant controller in a rotor-side current transformer of the system as the DQ coordinate subsynchronous frequency component to enhance control of a double-fed induction generator for the subsynchronous frequency component of the system so as to suppress the subsynchronous resonance of the system. The method and the device are capable of suppressing the subsynchronous resonance of the double-fed induction generator-series compensation power transmission system effectively.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a subsynchronous resonance suppression method and device for a doubly-fed fan-series compensated power transmission system. Background technique [0002] In recent years, wind power, as a kind of green energy, has developed rapidly, and the installed capacity of wind power in large-scale gathering areas is already equivalent to that of thermal power plants. As a mature and economical long-distance power transmission technology, series compensation capacitor has broad application prospects in large-scale wind power transmission. The wind power transmission in North China adopts such a structure. [0003] The risk of subsynchronous oscillation caused by series compensation also exists in the wind power-series compensation transmission system. The modeling, mechanism analysis and suppression of subsynchronous resonance in wind power-series compensated transmission system ha...

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/002H02J3/24
Inventor 胡应宏邓春李雨刘辉蔡巍彭珑
Owner NORTH CHINA ELECTRICAL POWER RES INST
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