Hybrid excitation type variable frequency AC starting generating system and control method thereof

Abstract

The invention discloses a hybrid excitation type variable frequency AC starting generating system and a control method thereof. The hybrid excitation type variable frequency AC starting generating system comprises a hybrid excitation type variable frequency AC starting generator, a first current sensor for detecting excitation current, a second, current sensor, a third current sensor, three voltage sensors, a position sensor, a changeover switch, a starting switch and a starting generating controller, wherein the second current sensor and the third current sensor are used for detecting armature current. The control method comprises the steps of performing the vector control method based on inverter voltage compensating during starting, and adjusting the excitation current according to the motor armature current and the real-time rotating speed; performing the sectional PI control method based on the output voltage frequency change during generating the power, and adding a load current compensating ring; controlling the changeover switch to switch according to the motor rotating speed and the output voltage during switching from starting to power generation. The method has important application value in the field of aviation independent power starting generating systems.

Description

technical field [0001] The invention relates to a starter generating system and a control method thereof, in particular to a hybrid excitation variable frequency AC starter generating system and a control method thereof. Background technique [0002] Aeroengines are usually equipped with a special starter to start. Commonly used starters include electric starters, gas turbine starters and air turbine starters. When the engine is started, it drives another special generator to generate electricity. Such a power supply system includes a starter and a generator, and the starter only plays a role in the starting process. For electric starting technology, a motor works in the electric state during the starting process to realize the starting of the engine, and after the engine is successfully started, it works in the power generation state, realizing the dual functions of starting and power generation, effectively reducing the system weight, increasing system reliability. [00...

AI Technical Summary

Problems solved by technology

This scheme improves the utilization rate of the excitation winding by setting two sets of power converters, but the two sets of power converters make the excitation control process more cumbersome and increase the complexity of the system structure

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