POTENTIAL SOURCE EXCITATION SYSTEM USING SPACE VOLTAGE VECTOR METHOD

摘要

PURPOSE: An excitation system is provided to compose a PWM boost converter and a PWM inverter using a space vector voltage method. CONSTITUTION: An excitation system includes a PWM boost converter(20), a PWM inverter (40), a PWM boost converter control means, and a PWM inverter control means. The PWM boost converter is to switch three phases output power source of a transformer for an electric power using an electric power transformation element to a PWM method and transform into a direct voltage to control a reverse rate control and a voltage size. The PWM inverter is to receive an output power source of the PWM boost converter via a back current preventing part(30) using a diode and supply an excitation power source to the field magnet of a generator by a switching. The PWM boost converter control means compares the output terminal direct current of the PWM boost converter with a voltage instruction value, make a comparison integration. The PWM boost converter control means each other compares the comparison integration value and the reverse rate control value with q axis and d axis current values which transforms an input terminal three phase current of the PWM boost converter into dq axis space vector value. The PWM boost converter control means make a comparison integration control each comparison value and is to generate a gating signal of the PWM boost converter using the space voltage vector method. The PWM inverter control means is to measure a generator voltage establishment value to instruct a voltage of a generator and an output terminal voltage of a real generator, compare with the establishment value, and generate a switching signal of the PWM inverter using a signal which is compared with a desert wave via the comparison integration control.