Source Diagnosis of Solid Oxide Fuel Cell System Oscillation Based on Data Driven

Abstract

The solid oxide fuel cell (SOFC) is a new energy technology that has the advantages of low emissions and high efficiency. However, oscillation and propagation often occur during the power generation of the system, which causes system performance degradation and reduced service life. To determine the root cause of multi-loop oscillation in an SOFC system, a data-driven diagnostic method is proposed in this paper. In our method, kernel principal component analysis (KPCA) and transfer entropy were applied to the system oscillation fault location. First, based on the KPCA method and the Oscillation Significance Index (OSI) of the system process variable, the process variables that were most affected by the oscillations were selected. Then, transfer entropy was used to quantitatively analyze the causal relationship between the oscillation variables and the oscillation propagation path, which determined the root cause of the oscillation. Finally, Granger causality (GC) analysis was used to verify the correctness of our method. The experimental results show that the proposed method can accurately and effectively locate the root cause of the SOFC system’s oscillation.

Investigation of Economical Design Strategies for the Solid Oxide Fuel Cell Afterburner Based on Computational Fluid Dynamics Simulation

“…In particular, the H-BoP consists of the afterburner, steam generator, reformer, and air-preheater and uses natural gas, water, air, and additional bypass air . The bypass air is injected into the afterburner to prevent thermal stress at the walls of the afterburner Figure shows a 1 kW SOFC system, which is the target process in this study.…”

“…8 The bypass air is injected into the afterburner to prevent thermal stress at the walls of the afterburner. 9 Figure 1 shows a 1 kW SOFC system, which is the target process in this study.…”