Control method and device for series hybrid power system or compound power supply

Abstract

The invention relates to the field of series hybrid power systems, in particular to a method and a device for control of a series hybrid power system or a composite power supply. The objective of theinvention is to solve the problem that the power of a generator unit and an energy storage device is difficult to accurately distribute. The series hybrid power system or the composite power supply inthe device for control of the series hybrid power system or the composite power supply comprises a prime motor, a generator, a rectifier and an energy storage device. The control device includes: anenergy storage device current control module and a generator rotating speed control module; the energy storage device current control module is used for generating a power reference value of the primemotor according to the current reference value and the current actual value of the energy storage device so as to control the current of the energy storage device; and the generator rotating speed control module is used for generating the control signal of the rectifier according to the rotating speed reference value of the generator and the rotating speed actual value of the generator so as to control the rotating speed of the generator. The method and the device for control of the series hybrid power system or the composite power supply do not need to make complex mode determination and canachieve real-time, accurate and controllable power distribution.

Description

technical field [0001] The invention relates to the field of series hybrid power systems, in particular to a control method and device for a series hybrid power system or a composite power supply. Background technique [0002] Energy saving and environmental protection are two prominent issues in the current social development. The development of electrified transportation is the development trend of the automobile, aviation and shipbuilding industries. However, the charging speed and energy density of batteries limit the popularization of transportation electrification technology. The series gasoline-electric hybrid system can reduce fuel consumption and pollution, and increase the cruising range of the vehicle. It not only has higher energy density and power density than the system powered by the battery alone, but also has a better performance than the system powered by the generator set alone. Therefore, it has been widely used in the energy power system of new energy ve...

AI Technical Summary

Problems solved by technology

However, the mechanical characteristics of small moment of inertia prime movers represented by gas turbines are soft, the speed fluctuates greatly with load changes, and the dynamic performance is poor; on the other hand, some existing engines require electric actuators to adjust the throttle, which is difficult to achieve fast and accurate control, especially some aero-engines

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