# US 10,320,315 B2 · Method for controlling wind turbines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,315 B2 - Document ID: US10320315B2 - Status: Granted - Kind: B2 - Application number: 14/909,703 - Filed: 2014-07-15 - Published: 2016-06-16 - Granted: 2019-06-11 - Earliest claimed: 2013-08-06 - Assignees: Wobben Properties GmbH - Applicants: Wobben Properties GmbH - Inventors: Alfred Beekmann - Web page: https://patentgrep.com/patent/US10320315B2 ## CPC - H02J 3/381: {Dispersed generators} - F03D 9/255: {connected to electrical distribution networks; Arrangements therefor} - H02J 3/46: Controlling the sharing of generated power between the generators, sources or networks - H02P 9/14: by variation of field (H02P9/08, H02P9/10 take precedence) - H02J 2101/28: Wind energy - Y02A 30/00: Adapting or protecting infrastructure or their operation - Y02E 10/72: Wind turbines with rotation axis in wind direction - Y02E 10/76: Power conversion electric or electronic aspects - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - F03D: WIND MOTORS - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A method for feeding electrical energy into an electrical supply grid by means of a wind turbine or wind farm, where the wind turbine or wind farm converts kinetic energy from wind with variable speed to electrical energy, a wind speed is predicted based on a wind forecast and a reactive power to be fed in is calculated as predicted reactive power based on the predicted wind speed. ## Claims ### Claim 1 A method for feeding electrical energy into an electrical supply grid by a wind turbine or wind farm, the method comprising: converting, using the wind turbine or wind farm, kinetic energy from wind with variable wind speed to electrical energy, predicting a wind speed based on a wind forecast, calculating a predicted reactive power to be fed in based on a predicted wind speed that is predicted over a forecast period, the predicted reactive power including a plurality of predicted reactive power values respectively corresponding to a plurality of time instances of the forecast period, feeding in, by the wind turbine or wind farm, the predicted reactive power at a point in the forecast period later than calculated, the feeding in including feeding in a predicted reactive power value of the plurality of predicted reactive power values later in the forecast period than a time instance respectively corresponding to the predicted reactive power value, and calculating an active power to be fed in as a predicted active power based on the predicted wind speed, and wherein: the predicted reactive power is greater than the predicted active power when a wind speed is predicted to be greater than a mean storm wind speed lying between a first wind speed of a storm and a second wind speed of a storm, the first wind speed of the storm is a wind speed from which the active power is reduced when the wind speed increases, and the second wind speed of the storm is a wind speed at which the active power is no longer fed into the electrical supply grid. ### Claim 2 (depends on 1) The method according to claim 1, further comprising transmitting the predicted reactive power as a forecast value to a grid control center that controls the electrical supply grid. ### Claim 3 (depends on 2) The method according to claim 2, wherein the predicted reactive power is calculated as the forecast value and transmitted as such to the grid control center only when the predicted wind speed is greater than the first wind speed of the storm. ### Claim 4 (depends on 1) The method according to claim 1, wherein: between the first wind speed of the storm and the second wind speed of the storm, the reactive power is set by a reactive power function that defines a connection between the reactive power and the wind speed, wherein the reactive power function is at least one of: a first or second-order polynomial function, and a hysteresis function. ### Claim 5 (depends on 1) The method according to claim 1, wherein the wind forecast is prepared based on information provided by at least one other wind turbine or wind farm. ### Claim 6 (depends on 1) A wind turbine for feeding electrical energy into an electrical supply grid using the method according to claim 1. ### Claim 7 (depends on 6) The wind turbine according to claim 6, wherein the wind turbine: comprises a generator that is designed for generating a generator nominal power, and a feed-in device, wherein said feed-in device feeds a maximum feed-in current that is greater than a feed-in current for feeding the generator nominal power. ### Claim 8 (depends on 7) The wind turbine according to claim 7, wherein the feed-in device comprises a plurality of feed-in units, and wherein more feed-in units are provided than utilized for feeding the generator nominal power. ### Claim 9 (depends on 8) The wind turbine according to claim 8 wherein the plurality of feed-in units are power cabinets. ### Claim 10 (depends on 1) A wind farm for feeding electrical energy into an electrical supply grid, wherein the wind farm is prepared for performing the method according to claim 1. ### Claim 11 (depends on 10) The wind farm according to claim 10, wherein the wind farm comprises: a central control unit for controlling the wind farm, and wherein the feeding in is implemented on said central control unit. ### Claim 12 (depends on 10) The wind farm according to claim 10, wherein the wind farm is configured to feed a larger current than a current required for feeding a maximum active power for which the wind farm is designed. ### Claim 13 (depends on 10) The wind farm according to claim 10, comprising a plurality of wind turbines.