Excitation control system for hybrid power system generator and method thereof

Abstract

The invention relates to an excitation control system for a hybrid power system generator and a method thereof. A power voltage dual-closed-loop control way is adopted; the generator works in a constant-power voltage-limiting mode by adjusting the generator current, so that power distribution control between an internal combustion generator set and a power battery pack in a series direct-coupled oil-power hybrid power system is realized, the floating charge voltage and maximum charging current of the power battery pack are limited, and the safety and the cycle lives of power storage batteries are ensured. The excitation control system has the advantages that 1, the absolute values and change rates of errors are detected according to the stable state and dynamic response situation of a controlled system; 2, the excitation current of the generator is controlled according to an entire controller, so that optimal power distribution of a front power chain is realized; the internal combustion generator set and the power battery pack with minimum power are configured, so that the manufacturing cost, size and weight of equipment are reduced greatly, and the average efficiency of an internal combustion engine is increased.

Description

technical field [0001] The invention relates to a generator excitation control system and a method thereof, in particular to a hybrid power system generator excitation control system and a method thereof. Background technique [0002] In recent years, with the increasingly prominent energy and environmental issues, "energy saving and emission reduction" has become a development concept that countries all over the world have to choose. The research and productization of new energy vehicles are in the ascendant, among which hybrid vehicles are an important branch. The serial oil-electric hybrid power system composed of internal combustion generator set and traction battery pack is widely used due to its simple system, relatively mature technology, wide application range, and the engine working state is not affected by the driving conditions of the vehicle. In this type of system, the electrical coupling between the power battery pack and the diesel generator set has two method...

AI Technical Summary

Problems solved by technology

However, the discharge capacity of the traction battery pack has a nonlinear relationship with the terminal voltage, and this traditional control method cannot accurately control the power distribution between the internal combustion generator set and the traction battery pack

In order to ensure the traction power of the vehicle, the method of simultaneously amplifying the power of the internal combustion unit and the capacity of the power storage battery is often adopted, resulting in an increase in equipment cost, volume and weight, and a decrease in the overall operating efficiency of the internal combustion engine.

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