A subsynchronous resonance suppression method for doubly fed wind turbines based on phase shift averaging of rotor currents

A doubly-fed wind turbine, subsynchronous resonance technology, which is applied to the flicker reduction of AC network, wind energy power generation, electrical components, etc.

Inactive Publication Date: 2018-12-11
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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  • Abstract
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  • Claims
  • Application Information

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However, the parameter design of the existing SSR controller depends on the system operating parameters, and its s

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  • A subsynchronous resonance suppression method for doubly fed wind turbines based on phase shift averaging of rotor currents
  • A subsynchronous resonance suppression method for doubly fed wind turbines based on phase shift averaging of rotor currents
  • A subsynchronous resonance suppression method for doubly fed wind turbines based on phase shift averaging of rotor currents

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[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a method for suppressing sub-synchronous resonance of doubly-fed wind turbine based on phase-shift average of rotor current, A small-signal model of doubly-fed wind turbine grid-connected system is established, Through eigenvalue analysis, the system parameters which have the most significant influence on the SSR mode and the main participating factors of the SSR oscillation mode are determined, On the basis of obtaining the frequency information of SSR subsynchronous component of rotor current, the subsynchronous component of rotor current can be reduced rapidly by adding the reference current to the inner ring of rotor through phase-shift transformation, so that the SSR of the system can be suppressed rapidly. The invention can rapidly reduce the sub-synchronous component of the rotor current, so as to rapidly suppress the system SSR.

Description

technical field [0001] The invention relates to a sub-synchronous resonance suppression method of a doubly-fed wind turbine based on rotor current phase-shifted average. Background technique [0002] Wind energy is a clean, renewable and high-quality energy with the most prospect of large-scale development. Since wind energy resources are generally far away from the load center, series capacitor compensation can effectively increase the transmission capacity of long-distance transmission systems, and thus is widely used in long-distance wind power transmission systems. However, the actual operation shows that the introduction of series capacitor compensation increases the risk of sub-synchronous resonance (SSR) induced by the wind power grid-connected system, and even causes damage to the grid-connected system equipment in severe cases. Therefore, the analysis of the SSR of the wind power grid-connected system and the research on the suppression strategy are of great signif...

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/002H02J3/386H02J2203/20Y02E10/76
Inventor 梁利清沈阳武张斌左剑张可人柳永妍杨洪朝陈斐泓廖凯徐岩
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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