Secondary excitation wind power conversion device, secondary excitation wind power control device, and control method for secondary excitation wind power conversion device

摘要

The present invention makes it possible to continue operation of a converter even when the rotational speed of a generator exceeds a slip range having upper and lower bounds of 30% of 1500 rpm, for example. A conversion device for secondary excitation wind-powered electricity generation comprises: a DC voltage regulator (AVDCR) that, on the basis of information of a system control power regulator (APR) and information of a stator-side voltage sensor and a generator-side converter current sensor, controls the generator-side converter by means of an excitation current regulator, and determines an amount of control for DC voltage from a DC voltage instruction and DC voltage sensor information; a system-side converter current regulator (ACR) that controls a system-side converter from a DC voltage amplitude calculation and system-side converter voltage information; a slip frequency calculator that compares information from a generator rotational speed sensor and a system-side voltage sensor and carries out slip control; a DC voltage instruction value calculator that generates the DC voltage instruction from slip control calculation information; and an adder-subtracter that compares information from the DC voltage instruction and a DC voltage sensor. The conversion device for secondary excitation wind-powered electricity generation has an upper and lower bound slip setting value for which the rotational speed of the generator is centered on a synchronous speed, detects deviation from the slip range, and alters the DC voltage.