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Method for controlling a wind farm in order to damp subsynchronous oscillations

A technology of power attenuation and oscillation characteristics, applied in general control systems, reducing/preventing power oscillation, wind power generation, etc., can solve problems such as difficult detection and attenuation

Pending Publication Date: 2021-02-19
WOBBEN PROPERTIES GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, low frequency oscillations can also vary continuously, making it difficult to detect and dampen

Method used

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  • Method for controlling a wind farm in order to damp subsynchronous oscillations
  • Method for controlling a wind farm in order to damp subsynchronous oscillations
  • Method for controlling a wind farm in order to damp subsynchronous oscillations

Examples

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Embodiment Construction

[0127] figure 1 A wind energy installation 100 is shown with a tower 102 and a nacelle 104 . A rotor 106 with three rotor blades 108 and a spinner 110 is arranged on the nacelle 104 . In operation, the rotor 106 is set in rotational motion by the wind, thereby driving a generator in the nacelle 104 .

[0128] figure 2 A wind farm 112 is shown as an example with three wind energy installations 100 , which can be identical or different. Thus, these three wind energy installations 100 basically represent any number of wind energy installations of the wind farm 112 . The wind energy installation 100 supplies its power, ie in particular the generated electric current, via a power plant grid 114 . In this case, the currents or powers respectively generated by the individual wind energy installations 100 are summed up and a transformer 116 is usually provided, which converts the voltage in the field up so that it can then be fed at a feed-in point 118 , also often referred to as...

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Abstract

The invention relates to a method for controlling a wind farm (112) in order to damp low-frequency electrical oscillations, in particular subsynchronous resonances, in an electrical supply grid (306),the supply grid (306) having a grid voltage with a nominal grid frequency, the wind farm (112) comprising at least one wind turbine (100, 300) connected to the electrical supply grid (306), comprising the steps: sensing at least one low-frequency electrical oscillation of the electrical supply grid; determining an oscillation characteristic of each of the at least one sensed oscillation, the oscillation characteristic describing at least one property of the sensed oscillation; specifying an active-power damping signal (DeltaP) and / or a reactive-power damping signal (DeltaQ) for damping the atleast one low-frequency oscillation characterized by the oscillation characteristic; feeding in an active power component in accordance with the active-power damping signal or a reactive power component in accordance with the reactive-power damping signal, the active-power damping signal (DeltaP) and the reactive-power damping signal (DeltaQ) being specified in dependence on the determined oscillation characteristic.

Description

technical field [0001] The invention relates to a method for controlling a wind farm for damping low-frequency oscillations in an electrical supply network. Furthermore, the invention relates to a wind farm with a plurality of wind energy installations for damping low-frequency oscillations in the power supply network. Background technique [0002] The supply grid generally has a grid nominal frequency of 50 Hz or 60 Hz. The grid nominal frequency can also be referred to as the system frequency. The supply network can also be referred to simply and synonymously as a supply network or grid. [0003] In the supply grid, low-frequency oscillations can occur, which have a frequency lower than the nominal frequency of the grid. The oscillation is often referred to as the subsynchronous resonance (SSR) or subsynchronous frequency. For this reason, the Institute of Electrical and Electronics Engineers (IEEE) has publicly defined the form of subsynchronous resonance in 1990, nam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24F03D7/02H02J3/38
CPCH02J3/24F03D7/0284F03D7/048H02J2300/28H02J3/381H02J3/48H02J3/50Y02E10/76Y02E10/72H02J13/00002G05B15/02H02J3/18
Inventor 阿拉米斯·施万卡特雷维桑安杰洛·门东萨杰尔·卡索利约翰内斯·布龙巴赫
Owner WOBBEN PROPERTIES GMBH
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