A method and system for regulating and controlling a gas-fired range-extended power generation system and an SOFC power generation system based on load changes.

Abstract

This invention discloses a method for regulating and controlling a gas-fired range extender power generation system and a SOFC power generation system based on load changes. This method is applied to a collaborative power supply system comprising an SOFC fuel cell, a gas-fired range extender power generation system, an energy storage battery, and an EMS control unit. The method collects load power data using a multi-function meter and calculates the predicted power demand based on a sliding window weighted prediction model. By comparing the energy storage battery's state of charge value with multi-level thresholds and the relationship between the predicted power demand and the SOFC's rated power, three operating modes are determined: independent SOFC power supply, collaborative power supply, and emergency charging. A power request command is sent to the gas-fired range extender power generation system via CAN communication. The range extender selects the optimal efficiency operating point within the high-efficiency operating range of the universal characteristic graph to perform variable-speed power generation, achieving power-following closed-loop control. Mode-smooth switching is achieved through continuous cyclic adjustment and preset stability judgment conditions. This invention solves the problems of high gas consumption and slow passive response in power regulation during fixed-speed operation of traditional generator sets.

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