Fuzzy logic control method for grid independent operation of fuel cell/battery hybrid system, and the apparatus for it

The present invention relates to a method of controlling the output of the fuel cell by determining a fuzzy logic according to the state of charge of the external electric load and battery in a hybrid system of a fuel cell and a storage battery independent operation possible with the device for implementing it. The method of the present invention, at the same time to an external load value and the state of charge (SoC) of the battery as input to determine the load sharing of the fuel cell and the storage battery based on the output value of the fuel cell operation predicted by the fuzzy logic of the fuel cell and the technical feature in controlling the process and the output, and a non-LMS for detecting the state of charge of the storage battery; Fuzzy logic controller for calculating the output value of the fuel cells from the state of charge of the battery and the external load value; Based on the calculated value of the fuzzy logic controller is implemented through a device consisting of a fuel cell power controller for controlling the output of the fuel cell controller and the DC / DC converter for controlling the process of a fuel cell. Method and apparatus of the present invention improves the operating efficiency of the entire system, by driving the fuel cell and the storage battery in a stable range, and to increase the durability, there is an advantage that the system is to allow rapid response to an external load. A fuel cell, a fuel cell / battery hybrid system, the purge