Ocean-buoy-oriented energy management system of solid oxide fuel cell

Abstract

The invention discloses an ocean-buoy-oriented energy management system of a solid oxide fuel cell. The ocean-buoy-oriented energy management system of the solid oxide fuel cell comprises an SOFC system, a DC / DC power conversion module and an energy storage management module. The energy storage management module comprises a storage battery and a super capacitor. Direct current emitted by the SOFC system is converted into 14V direct current and 24V direct current through the DC / DC power conversion module. A 24V power source provides electric power for the SOFC. A 14V power source provides electric power for an ocean buoy. The super capacitor and the storage battery are connected to a 14V direct current bus. Instant peak power is provided for the ocean buoy of the super capacitor through the super capacitor. The storage battery provides electric power for the SOFC when the SOFC is started or breaks down and supplements power when the ocean buoy takes samples. According to the ocean-buoy-oriented energy management system of the solid oxide fuel cell, the storage battery and the super capacitor serve as energy storage devices, so that output electric power of the SOFC is stabilized in the mean power state which is needed by the system, the optimal work point of operation of the SOFC is guaranteed, the service life of a galvanic pile is prolonged, efficiency is improved, the self-starting function and the urgent fault coping capacity are achieved, and the requirement for long-term stable work of an ocean buoy system is satisfied.

Description

technical field [0001] The invention belongs to the technical field of marine application of solid oxide fuel cells. More precisely, it is an auxiliary energy storage equipment that reasonably controls energy flow according to load characteristics to ensure that solid oxide fuel cells (SOFC) work in a stable state. The solid oxide fuel cell energy management system can prolong the service life of the stack, improve the system efficiency, and provide long-term stable power supply for the marine buoy system. Background technique [0002] High energy ratio, large capacity, long life, low cost and safe and reliable power supply technology are key technologies that marine equipment urgently needs to develop. Taking ocean buoys as an example, they work in the open sea for a long time, collect and detect ocean data, and send them to land receiving stations through remote communication. Facing the complicated ocean multi-element environment, while ensuring the stable operation of it...

AI Technical Summary

Problems solved by technology

The dynamic response time of the independent SOFC power supply system is at the second level, and the load power is at the millisecond level. When the load suddenly increases, the anode fuel consumption increases. Due to the hysteresis of the SOFC system, the consumed fuel cannot be replenished in time, which is easy to cause The instantaneous shortage of anode fuel leads to electrode oxidation, which reduces the performance and life of the stack. At the same time, the output voltage decreases, and the output power is difficult to meet the instantaneous sudden increase in load power demand; when the load suddenly decreases, it will cause instantaneous excess fuel, resulting in energy waste

In addition, the SOFC power supply system operates in the ocean, the environment is harsh, unattended, and the maintenance cost is high. Therefore, the power supply system is required to have self-starting functions, fault emergency handling functions, remote monitoring functions, etc.

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