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Method for controlling a wind power plant and corresponding wind power plant

A technology of wind energy equipment and rotor blades, which is applied to the control of mechanical equipment, wind power generation, and wind turbines, etc., and can solve problems such as increased load of wind energy equipment, adjustment algorithms that easily cause vibration, and are difficult to implement

Inactive Publication Date: 2007-09-05
SENVION GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because it is impossible to obtain the wind speed reflecting the actual wind state without high cost so far, the above-mentioned methods have a great disadvantage, that is, they are difficult to realize in practice
[0025] With the known state of the art no method has been found so far, which enables reduced power operation in the range of wind speeds, for example between 25 to 35 m / s or 25 to 40 m / s, especially for plants of several megawatts, whereas Can effectively eliminate the increase of wind energy equipment load
In addition, especially when the wind speed is high, the fluctuation of the wind speed at this time brings about a large fluctuation of the blown energy, and the adjustment algorithm known in the prior art is very easy to cause vibration
For this reason the above-mentioned method has so far been hardly used in practice

Method used

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  • Method for controlling a wind power plant and corresponding wind power plant
  • Method for controlling a wind power plant and corresponding wind power plant
  • Method for controlling a wind power plant and corresponding wind power plant

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Embodiment Construction

[0086] FIG. 1 has already been explained when discussing the prior art, so it should not be discussed again here.

[0087] Figure 2 has also been described in the prior art, so only some additions should be made here.

[0088] Figure 2 shows a speed characteristic curve in the lower partial load region UB indicated by a thin solid line, which is specified in Ω U and Ω N Optimum energy gain in the limited speed range between them. The regulation of the rotational speed is usually carried out by means of a pair of generator torque acting PI or PID controllers, wherein the torque is limited according to the rotational speed in order to achieve a rotational speed ramp for operation at optimum fast operating speeds. Alternatively, as described above, a simple speed-torque dependence can also be determined, for example in the form of a table function, in order to implement a particularly simple control algorithm. Such a fixed speed-torque characteristic curve results, for example...

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Abstract

The power of wind energy or the revolution rate drive down to the prescribed limit value has been carried based on easily measured in physical and control technique aspect and reflect the input variable of machine utilization but not based on the metrical wind speed. For the assume of this invention, use rotor blade angle as input variable, then when arrive in the limit value adjust power and the drive down of revolution rate based on the rotor blade angle.

Description

technical field [0001] The invention relates to a method for regulating a wind power plant according to the preamble of claim 1 and a wind power plant according to the preamble of claim 17 . Background technique [0002] The known method is used in wind power installations having a rotor with at least one rotor blade, wherein the rotor blade is arranged relative to the rotor at an adjustable rotor blade angle. The rotor rotational speed is adjusted by known methods within a defined wind speed range with adjustment of the rotor blade angle in order to adjust the defined power. [0003] For a better understanding, the regulation of the wind energy installation will be explained below with the aid of the power and rotational speed characteristic curves shown in FIG. 1 as a function of the wind speed. [0004] The usual power and speed characteristic curves that occur in practically most wind energy installations today have two regions. [0005] The first area of ​​the power a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D7/04
CPCF05B2270/3201Y02E10/723F03D7/0292F03D7/042F05B2270/101F05B2270/335F05B2270/708F05B2270/1016F05B2270/1033F03D7/0224F05B2270/328F05B2270/706Y02E10/72
Inventor S·马蒂亚斯
Owner SENVION GMBH
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