Patent ID: 11916270
Assignee: ZHEJIANG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An active fault-tolerant temperature control method for a proton exchange membrane fuel cell system, comprising the following steps:
S1: establishing a fuel cell system temperature control model;
S2: establishing a system structure matrix by a structural analysis method;
establishing, for the fuel cell system temperature control model by the structural analysis method, the system structure matrix, wherein a horizontal axis of the system structure matrix is unknown system variables and a vertical axis of the system structure matrix is system equations; and for one element in the system structure matrix, when a system equation of the system equations of the vertical axis corresponding to a matrix element comprises an unknown system variable of the unknown system variables of the horizontal axis corresponding to the matrix element, marking the matrix element as 1, and otherwise, marking the matrix element as 0;
S3: decomposing the system structure matrix by using a Dulmage-Mendelsohn method to obtain a decomposed system structure matrix, wherein the decomposed system structure matrix is presented as an upper triangle shape; obtaining a redundant part of the decomposed system structure matrix, wherein the redundant part is a region, and a number of the system equations is greater than a number of the unknown system variables in the region in the decomposed system structure matrix; constructing a residual in the redundant part, detecting a fault of a sensor in the fuel cell system temperature control model online through the residual: when the residual is below a set threshold, the sensor in the fuel cell system temperature control model does not fail, and when the residual is above the set threshold, the sensor in the fuel cell system temperature control model fails; and
S4: designing, on the basis of a sensor fault identification in step S3, an active fault-tolerant control structure based on a sliding mode controller, to realize fault-tolerant control over a fuel cell outlet temperature.