Fuel cell hybrid power system and its control method based on random load

Abstract

The invention discloses a fuel cell hybrid power system based on a random load. The system comprises a fuel cell device serving as a main power source, a storage battery device serving as an auxiliarypower source, a power conversion device and a power prediction energy management control device, the fuel cell device and the storage battery device are connected with the power conversion device, and the power prediction energy management control device is connected with the fuel cell device, the storage battery device and the power conversion device. The system ensures efficient output of powerand healthy and stable operation of the main power source and the auxiliary power source under the working condition of random load or large load change. The invention further discloses a control method of the fuel cell hybrid power system based on the random load.

Description

technical field [0001] The invention relates to the control field of a fuel cell hybrid power system, in particular to a random load-based fuel cell hybrid power system and a control method thereof. Background technique [0002] With the development of hybrid powertrains, economical efficiency is getting more and more attention. The hybrid power system of fuel cell vehicles is the main symbol that distinguishes fuel cell vehicles from other types of vehicles (internal combustion engine vehicles, battery electric vehicles and oil-electric hybrid vehicles). In the hybrid power system, the fuel cell is not the only power source of the power system of the fuel cell vehicle. Since the fuel cell is not good in terms of peak power output capability and dynamic response of power output, some auxiliary power sources (such as batteries) are often needed. and supercapacitor) device to supplement and improve it in terms of power output capability, thus forming a fuel cell hybrid power ...

AI Technical Summary

Problems solved by technology

[0004] However, because the existing control strategy divides the output power into several fixed intervals and does not predict the load power at the next moment, when facing random loads or large load changes (such as sudden load increases or decreases) , the output power of the fuel cell will suddenly increase or decrease, resulting in large fluctuations in the output power of the fuel cell, and even continuous start and stop, which will affect the life of the fuel cell and reduce the overall system economy

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