Nonlinear suppression method for solid oxide fuel cells based on multi-model predictive control

A technology of solid oxides and fuel cells, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., and can solve problems such as control quantity constraints

Active Publication Date: 2018-05-04
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a solid oxide fuel cell nonlinear suppression method based on multi-model predictive control, which can solve the nonlinear multivariable coupling of solid oxide fuel cells in the control process, control amount constraints, and Disturbance suppression problem, to ensure that the fuel cell maintains a constant output voltage after the external resistance changes, and the fuel utilization rate is within a reasonable range of 0.7 to 0.9

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  • Nonlinear suppression method for solid oxide fuel cells based on multi-model predictive control

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[0060] The technical solution of the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0061] This specific embodiment discloses a non-linear suppression method for solid oxide fuel cells based on multi-model predictive control, such as figure 1 shown, including the following steps:

[0062] S1: Aiming at the nonlinearity of the solid oxide fuel cell itself, conduct nonlinear analysis and identification modeling of the controlled solid oxide fuel cell at multiple operating points, and construct a linear fuel cell sub-model at each operating point. According to the fluctuation range of the resistive load of the solid oxide fuel cell, five operating points of the fuel cell at different resistive load disturbances, output rated voltage, and fuel utilization ratio of 0.8 are selected, as shown in Table 1, and four operating points ( 1#, 2#, 3#, 5#) of the solid oxide fuel cell are respectively subjected to...

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Abstract

The invention discloses a nonlinear suppression method for solid oxide fuel cells based on multi-model predictive control. The nonlinear multi-variable coupling problem of solid oxide fuel cells is solved by online multi-model weighted predictive control. A feedforward method is adopted to compensate for the disturbance of a resistive load to achieve disturbance restraint. At the same time, constraints on hydrogen flow the air flow are added to performance indexes, and the feasibility of a control system is achieved through a feedback correction link based on a Kalman filter, and the control effect is improved. It is ensured that the fuel cells maintain a constant output voltage after external resistance changes, and the fuel utilization rate is within a reasonable range of 0.7 to 0.9.

Description

technical field [0001] The invention relates to the field of automatic control of new energy technologies, in particular to a non-linear suppression method for solid oxide fuel cells based on multi-model predictive control. Background technique [0002] The problems of solid oxide fuel cells on the road to commercial operation mainly focus on the effective control of solid oxide fuel cells. [0003] As traditional energy sources become increasingly tense and environmental problems become increasingly prominent, the country continues to increase its efforts in the development of new energy fields, and solid oxide fuel cells are one of the hot spots. However, in the process of putting solid oxide fuel cells into actual operation , the effective control of the fuel cell is one of the key issues. [0004] None of the existing control schemes can effectively solve the problems of nonlinearity, multivariable coupling, disturbance suppression, control quantity constraints, constan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 乌龙沈炯孙立
Owner SOUTHEAST UNIV
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