Permanent magnet power generation system for lowering direct current side voltage fluctuation and control method of permanent magnet power generation system

Abstract

The invention discloses a permanent magnet power generation system for lowering direct current side voltage fluctuation and a control method of the permanent magnet power generation system. The permanent magnet power generation system partially comprises a high-impedance permanent magnet power generator, a bridge-type power converter, a power generator circuit breaker, a rotary transformer for collecting position signals of a motor rotor in real time, a decoding circuit, a current sensor for collecting motor three-phase armature winding current in real time, a voltage sensor for collecting direct-current-side output voltage in real time and an electrical load. The method partially comprises the steps of replacing a PI controller with a two-degree of freedom controller, applying the PI controller to an outer loop voltage ring, and adjusting the setting value tracing performance and the anti-jamming performance of the system through two adjustable parameters. To further reduce the fluctuation of direct-current-side voltage when the loads are suddenly loaded and unloaded, by controlling the variation amount of quadrature-axis current, the instruction value of the direct-current side voltage is adjusted; when the loads are suddenly loaded, the instruction value of the direct-current-side voltage is increased; when the loads are suddenly unloaded, the instruction value of the direct-current-side voltage is lowered. Extra hardware is not needed, implementation is simple, the fluctuation of output voltage at the direct-current-side can be lowered on the condition that the loads are suddenly loaded and unloaded, and the dynamic performance of the system is improved.

Description

technical field [0001] The invention relates to a power generation system, in particular to a control method of a permanent magnet power generation system for reducing DC side voltage fluctuation, and belongs to the technical field of power generation. Background technique [0002] Airborne systems are expected to have lower fuel consumption, lower weight, safer and easier maintenance. Therefore, the concept of a more electric aircraft was proposed. Multi-electric aircraft use electrical systems to replace pneumatic and hydraulic systems, such as engine starting, environmental control systems, wing anti-icing systems, drive systems, and more. At the same time, more electric aircraft has also led to an increasing demand for electrical energy, which is provided by engine-driven generators. Therefore, the type of generator will have a large impact on the aircraft power system. Permanent magnet motors have the advantages of high power density, high efficiency and high speed. ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem of large output voltage fluctuations on the DC side of the permanent magnet controllable power generation system in the prior art under the condition of a sudden load change, and to provide a simple, effective and reliable method for reducing voltage fluctuations on the DC side. The control method of the permanent magnet generator system

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