Fuel cell hybrid power system for small inland river boat

Abstract

The invention discloses a fuel cell hybrid power system for a small inland river boat. By parallel output of a fuel cell and a supercapacitor, when one power source is in performance decline, the other one can provide energy required by the small inland river boat. The output voltage of a fuel cell stack passing through a single-way DC / DC converter is higher than the full voltage of the supercapacitor. When the small inland river boat requires low output power, the fuel cell provides energy and charges the supercapacitor until the supercapacitor is fully charged, and then charging is stopped.When the output power required by the small inland river boat exceeds capacity of the fuel cell, the fuel cell and the supercapacitor operate simultaneously to provide power for the small inland riverboat. Once fuel cell faults or fuel exhausting occur in a navigation process of the small inland river boat, a diesel generating set starts to provide electric energy for the small inland river boatto return. Therefore, navigation time of the small inland river boat can be prolonged to the greatest extent, an air power system is simplified, a proportion of a power system is decreased, and systemenergy consumption is reduced.

Description

technical field [0001] The invention relates to the field of hybrid power sources, and more specifically relates to a fuel cell hybrid power system for a small inland watercraft. Background technique [0002] In recent years, with the continuous improvement of environmental protection requirements, the traditional small inland riverboats powered by fuel engines cannot meet the environmental requirements. Many scenic spots have strictly prohibited the operation of sightseeing boats driven by diesel engines only. Pure solar small inland riverboats using solar energy and batteries are getting more and more attention. But at this stage, due to the low energy density and instability of solar energy and the limited space of cruise ships, the power system capacity of pure solar cruise ships is limited and the endurance is insufficient, which limits the application of small inland river boats and seriously affects the economic development of tourist attractions. Fuel cells have the...

AI Technical Summary

Problems solved by technology

Due to the poor dynamic characteristics of the fuel cell, the rapid fluctuation of power will seriously affect its own life, and cause the bus voltage fluctuation to reduce the power quality, so the fuel cell needs to cooperate with the energy storage device

At present, most of the auxiliary energy of the hybrid power system is powered by a single battery. The characteristics of the battery are that the technology is relatively complete, the structure is simple and the cost is low, but it occupies a large space, and the consistency and accuracy of the battery are difficult to solve. When the power fluctuates greatly, it is difficult for the battery to meet the performance requirements and there is a problem of shortened life

In addition, the fuel cell power system needs to match the electric air compressor according to the power. At present, the air supply system of the fuel cell power system has a large number of electric air compressor components. When applied to small inland watercraft, there are complex structures and start-up waiting time. too long question

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