|Title of Invention||
A WIND POWER INSTALLATION AND/OR A WIND PARK
|Abstract||The present invention relates to a wind power installation having a device for regulating (16, 18, 20) the power to be delivered to a current voltage network (Ll, L2, L3), to feed a constant apparent power to the network.|
The present invention concerns a wind power installation/or a wind )ark comprising a plurality of wind power installations.
Wind power installations or a wind park consisting thereof are usually ;onnected to a current voltage network into which the electrical current penerated is fed or delivered.
The particularity of the current feed in the case of wind power nstallations is that the greatly fluctuating wind conditions mean that the power which is fed in also correspondingly fluctuates. That is a great iifference in relation to energy generators such as atomic power stations, vater power stations, coal-fired or natural gas-fired power stations, in vhich admittedly fluctuations can possibly also be found over prolonged periods of time but which do not involve power fluctuations for relatively short periods of time. Therefore atomic power stations, water power ;tations, natural gas-fired power stations and so forth are rather used to urnish the basic load of a network while it is only in areas with continual vind that wind power installations are in a position also to provide a basic :urrent load.
Therefore wherever wind power installations which provide in )articular a greatly fluctuating feed of power are connected to the network, he electricity supply utility (ESU) also often has to implement a stabilising >r supporting measure for the network as there is a wish on the part of the :SU that there are no current and voltage fluctuations in the network.
The object of the present invention is to avoid or at least reduce the ibove-indicated disadvantages.
That object is attained by a wind power installation or a wind park omprising a plurality of wind power installations, with the feature of claim .. Advantageous developments are set forth in the appendant claims.
The invention provides that, independently of the currently prevailing amount of wind and the active power which is thus available from the wind
only operated in a fault-free manner but they are also supported in terms of their operational efficiency. That therefore, overall increases the quality standard of the current fed into the network or the entire wind power installation which also actively contributes to the network quality, this being possible by the wind power installation apparent power regulation in accordance with the invention.
Accordingly the present invention provides a wind power installation and/or a wind park comprising a plurality of wind power installations having a device for regulating (16, 18, 20) the power to be delivered to a current voltage network (LI, L2, L3), wherein the regulation is adjusted such that a constant apparent power is always fed to the network.
The invention is described in greater detain remember by means or an embodiment with reference to the drawings in which:
Figure 1 shows a reactive power/active power time diagram of a control of a wind power installation, and
Figure 2 is a view of a block circuit diagram of a regulating device of a wind power installation.
Figure 1 shows a reactive power/active power time diagram of a regulation in accordance with a wind power installation according to the invention. Therein P denotes the active power and Q the reactive power.
As can be seen from the diagram the values in respect of the active power and also in respect of the reactive power behave in reciprocal relationship with each other, that is to say with a rising active power the reactive power falls and vice-versa.
The sum of the squares of active power and reactive power is constant in that case.
Figure 2 shows a regulating device for implementation of the control according to the invention of a wind power installation. The control regulating device of the wind power installation firstly has a rectifier 16 in which the ac voltage generated in the generator of the wind power installation is rectified (dc voltage intermediate circuit). A frequency converter connected to the rectifier converts the dc voltage which is initially the same in the intermediate circuit into an ac voltage which is fed into the network in the form of a three-phase ac voltage, by way of the lines LI, L2 and L3. The frequency converter 18 is controlled by means of the microcomputer 20 which is part of the overall regulating device. For that purpose, the microprocessor is coupled to the frequency converter 18. The input parameters for regulation of the voltage and also the phase and the
1. A wind power installation and/or a wind park comprising a
plurality of wind power installations having a device for regulating (16, 18,
20) the power to be delivered to a current voltage network (LI, L2, L3),
wherein the regulation is adjusted such that a constant apparent power is
always fed to the network.
2. The wind power installation and/or a wind park according to
claim 1 wherein the apparent power is calculated in accordance with the
wherein S is the magnitude of the apparent power, P the magnitude of the active power and Q the magnitude of the reactive power.
3. A wind power installation and/or a wind park, substantially as
herein described with reference to the accompanying drawings.
|Indian Patent Application Number||816/CHENP/2003|
|PG Journal Number||26/2007|
|Date of Filing||26-May-2003|
|Name of Patentee||SHRI. WOBBEN, Aloys|
|Applicant Address||Argestrasse 19 26607 Aurich (DE).|
|PCT International Classification Number||F03D 1/00|
|PCT International Application Number||PCT/EP01/13203|
|PCT International Filing date||2001-11-15|