WIND TURBINE CONTROL METHOD

• Main Authors: HUARTE AMEZQUETA, ANA, ROYO GARCIA, RICARDO, GARCIA BARACE, ALBERTO, NUNEZ POLO, MIGUEL, ARLABAN GABEIRAS, TERESA, ALONSO SADABA, OSCAR, TONKS, STEPHEN, GARCIA SAYES, JOSE MIGUEL
• Format: Patent
• Language: English; French; German
• Published: 04.05.2011
• Subjects: BLASTING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PRODUCING MECHANICAL POWER; SYSTEMS FOR STORING ELECTRIC ENERGY; WEAPONS; WIND MOTORS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

The invention relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF) and a regulator (1) which calculates the reactive power to be generated (QT) as a function of the voltage error (?V), such that it can be operated over the entire voltage range. The system also includes: at least one saturator element (2, 6, 7) in which the reactive power to be generated is limited, whereby the limits (Q_MAX, Q_MIN, QC_MAX, QC_MIN, QS_MAX, QS_MIN) are calculated dynamically as a function of the voltage, this block outputting a reference reactive power of the wind turbine (Q_REF, QC_REF, Qs_REF); and an element (3) for calculating the actual limit of the active power (PMAX) as a function of the pre-limited reactive power (Q_REF, QS_REF) and the apparent power available at that moment.