Method for operating a wind energy installation

Patent metadata

Field	Value
Publication number	US-9705334-B2
Application number	US-201214239999-A
Country	US
Kind code	B2
Filing date	Aug 14, 2012
Priority date	Aug 23, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

The present invention concerns a method of feeding electric power into an electric network wherein the feed is effected by means of at least one wind power installation with a first feed-in arrangement at a feed-in point into the electric network, and the feed is effected in dependence on electric parameters in the network and measurement values of the electric parameters or measurement values for determining the electric parameters are detected at measurement times at predetermined time intervals and wherein the measurement times are synchronized to an external time signal available outside the first feed-in arrangement.

First claim

The invention claimed is:

1. A method of feeding electric power into an electric network, the method comprising:
measuring electric network parameters at two different locations of the electric network, the measuring at the two different locations occurring over the same time period; and
feeding power into the network from at least one wind power installation wherein the feed is effected by means of the at least one wind power installation with a first feed-in arrangement at a feed-in point into the electric network, and the feed is effected in dependence on the measured electric network parameters in the network and the measurement values of the electric parameters are detected at measurement times at predetermined time intervals and wherein the measurement times are synchronized to an external time signal available outside the first feed-in arrangement.

2. A method according to claim 1 wherein the at least one wind power installation is in the form of a wind park with a plurality of wind power installations.

3. A method according to claim 1 wherein the measurement values are recorded as average values over a predetermined period duration, in particular averaged.

4. A method according to claim 1 wherein a plurality of feed-in arrangements are operated and each feed-in arrangement is operated for feeding into the network at a respective dedicated feed-in point and wherein each of said feed-in arrangements uses the same time signal for synchronization of the respective measurement times so that the measurement times of all said feed-in arrangements are synchronized so that all said feed-in arrangements detect the measurement values at respective identical moments in time.

5. A method according to claim 4 wherein the feed-in arrangements respectively use identical synchronization, an identical measurement period and/or an identical measurement method.

6. A method according to claim 1 wherein a time signal of a satellite-supported positioning system such as for example GPS is used as the external time signal.

7. A method according to claim 1 wherein at least one feed-in arrangement has a respective clock, in particular a highly accurate clock, the measurement times are calculated by means of the clock and the clock is regularly synchronized by means of the external time signal to achieve time equality of the measurement times of the feed-in arrangements.

8. A method according to claim 1 wherein the network voltage is detected as the electric parameters.

9. A method according to claim 1 wherein measures for supporting the network are implemented in dependence on the detected electric parameters, in particular in dependence on the detected network voltage, and in particular active power and/or reactive power are fed into the network in dependence on the detected network voltage.

10. A wind power installation-comprising:
an aerodynamic rotor for producing a rotary movement from wind;
an electric generator for generating electric power from the rotary movement;
an inverter, for feeding the electric power or a part thereof into an electric network at a feed-in point using a feed-in arrangement; and,
a controller that:
receives measured electric network parameters at two different locations of the electric network, the electric network parameters being measured over the same time period, the measured electric network parameters being made at measurement times in accordance with predetermined time intervals and wherein the measurement times are synchronized to an external time signal available outside of the feed-in arrangement; and
determines the electric power feed into the electric network in dependence on the measured electric network parameters.

11. A wind park having a plurality of wind power installations according to claim 10 .

12. A wind park arrangement having a plurality of wind parks according to claim 11 .

13. The method according to claim 1 , wherein feed-in point is within the feed-in arrangement.

14. The wind power installation according to claim 10 , further comprising:
a regulator including:
a voltage pickup device; and
a reactive power setting device.

15. A method of feeding electric power into an electric network, the method comprising:
determining measurement values of an electrical parameter of the electric network at a plurality of feed-in locations based on an external clock that is operatively coupled to a plurality of wind power installations, wherein the determining occurs at a particular time and for a particular duration of time based on the external clock; and
using at least one wind power installation that is coupled to a first one of the plurality of feed-in arrangements, to feed in electric power generated by the at least one wind power installation based on at least one of the determined measurement values of the electric parameter network that are synchronized.

16. The method according to claim 15 , wherein the measurement values are averaged to determine an averaged measurement value, wherein feeding in the electric power is based on the averaged measurement value.

17. The method according to claim 15 , wherein the external clock is a part of a global positioning system.

18. The method according to claim 15 , wherein the electric parameter is the voltage of the electric network.

Assignees

• Giertz Helge
• Wobben Properties Gmbh

Inventors

• Giertz Helge

Classifications

• H02J3/381

  Dispersed generators · CPC title

• H02J2101/28

  Wind energy · CPC title

• H02J3/0014

  for preventing or reducing power oscillations in networks · CPC title

• H02J3/40 Primary

  Synchronisation of generators for connection to a network or to another generator · CPC title

• Y02E10/76

  Power conversion electric or electronic aspects · CPC title