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Method and device for suppressing subsynchronous resonance of doubly-fed wind turbine

A double-fed wind turbine, subsynchronous resonance technology, applied in circuit devices, wind power generation, electrical components, etc., can solve the problems of high cost and high speed detection accuracy, achieve low cost, avoid high-precision detection, and construction cost. low effect

Active Publication Date: 2021-05-25
NORTH CHINA ELECTRICAL POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former method needs to add large-scale hardware equipment, and the cost is high; the latter method requires high speed detection accuracy. At present, wind turbines in commercial applications do not have such performance, and the speed sensor needs to be upgraded, resulting in additional hardware costs and construction cost

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  • Method and device for suppressing subsynchronous resonance of doubly-fed wind turbine
  • Method and device for suppressing subsynchronous resonance of doubly-fed wind turbine
  • Method and device for suppressing subsynchronous resonance of doubly-fed wind turbine

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Embodiment Construction

[0028] 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.

[0029] figure 1 It is a schematic diagram of a single doubly-fed wind turbine connected to the grid through a series compensation line in the embodiment of the present invention, as shown in figure 1 As shown, the converter controller controls the converter, and transmits the electric energy generated by the doubly-fed induction generator 1 to the power grid 6 through the transformer 4 and the series compensation line 5, wherein the converter controller includes a machine-side controller 21 and The grid-side controller 22, and the corresponding converters also includ...

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Abstract

The invention discloses a sub-synchronous resonance suppressing method and device for a doubly-fed wind generator set. The method includes: obtaining a sub-synchronous resonance component in the rotor voltage of a doubly-fed wind turbine; performing phase compensation on the sub-synchronous resonance component to obtain the The compensation increment of the synchronous resonance component; superimposing the compensation increment to the rotor voltage reference value of the double-fed wind turbine; performing pulse width modulation on the superimposed rotor voltage reference value, and outputting the actual rotor voltage to the double-fed wind turbine . The invention can reduce the cost of equipment and construction while realizing the subsynchronous resonance suppression of the wind turbine for the doubly-fed generating set.

Description

technical field [0001] The invention relates to the field of new energy power generation, in particular to a method and device for suppressing subsynchronous resonance of a doubly-fed wind turbine. Background technique [0002] Subsynchronous oscillations between wind power and series-compensated lines have occurred in many areas at home and abroad, such as Texas in the United States and northern Hebei and Northeast China. Subsynchronous resonance has occurred many times in the Guyuan area of ​​Zhangjiakou in my country, which seriously affects the safety of the power grid. However, subsynchronous oscillations in wind power and series compensation lines mainly occur in doubly-fed generator sets, which are caused by the induction generator amplification effect of doubly-fed induction generators and machine-side control. [0003] At present, the solution ideas for subsynchronous resonance suppression of wind turbines for double-fed units are based on the subsynchronous oscill...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/386H02J3/24Y02E10/76
Inventor 李蕴红刘辉王潇孙大卫于弘洋赵国亮
Owner NORTH CHINA ELECTRICAL POWER RES INST