Low-wind ride-through of a wind turbine
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsSamuel Hawkins, Dennis Stachniuk Jensen
Life of this patent
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Abstract
A method of controlling a wind turbine is provided including a generator system, an energy storage system and auxiliary equipment, the method including, in particular during a low wind condition: controlling the generator system in order to provide power from the generator system to the auxiliary equipment, in particular such that a rotor speed does not decrease; controlling the energy storage system in order to provide power from the energy storage system to the auxiliary equipment, if required to meet a power requirement of the auxiliary equipment; in particular keeping the wind turbine in operation.
Claims16
A method of controlling a wind turbine comprising a generator system, an energy storage system and auxiliary equipment, the method comprising, during a low-wind condition:
- controlling the generator system in order to provide power from the generator system to the auxiliary equipment, such that a rotor speed does not decrease;
- and
- controlling the energy storage system in order to provide power from the energy storage system to the auxiliary equipment, if required to meet a power requirement of the auxiliary equipment;
- the controlling the generator system and controlling the energy storage system further comprising:
- determining a first amount of electrical power the generator system is capable of delivering;
- if the first amount of power is smaller than a third amount of power needed by the auxiliary equipment:
- providing substantially the first amount of power from the generator system to the auxiliary equipment;
- determining a second amount of power such that the sum of the first amount and the second amount of power substantially equals the third amount of power;
- providing the second amount of power from the energy storage system to the auxiliary equipment,
- wherein the first amount of power is determined to be limited such that the rotor speed of the rotor does not decrease substantially, when the first amount is actually extracted from the generator system,
- wherein the low wind condition is when the rotational speed of the rotor deviates less than 20% from a minimum rotational speed.
An arrangement for controlling a wind turbine comprising a generator system, an energy storage system and auxiliary equipment, during a low wind condition, the arrangement being configured:
- to control the generator system in order to provide power from the generator system to the auxiliary equipment, such that a rotor speed does not decrease;
- to control the energy storage system in order to provide power from the energy storage system to the auxiliary equipment, if required to meet a power requirement of the auxiliary equipment;
- to determine a first amount of electrical power the generator system is capable of delivering;
- if the first amount of power is smaller than a third amount of power needed by the auxiliary equipment:
- to provide substantially the first amount of power from the generator system to the auxiliary equipment;
- to determine a second amount of power such that the sum of the first amount and the second amount of power substantially equals the third amount of power;
- to provide the second amount of power from the energy storage system to the auxiliary equipment,
- wherein the first amount of power is determined to be limited such that the rotor speed of the rotor does not decrease substantially, when the first amount is actually extracted from the generator system,
- wherein the low wind condition is wherein the rotational speed of the rotor deviates less than 20% from a minimum rotational speed.
Dependencies are inferred from the claim text.