<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Compared with other kinds of fuel cells, solid oxide fuel cell (SOFC) has been widely used in microgrids because of its higher efficiency and longer operation life. The weakness of SOFC lies in its slow response speed when grid disturbance occurs. This paper presents a control strategy that can promote the response speed and limit the fault current impulse for SOFC systems integrated into microgrids. First, the hysteretic control of the bidirectional DC-DC converter, which joins the SOFC and DC bus together, is explored. In addition, an improved droop control with limited current protection is applied in the DC-AC inverter, and the active synchronization control is applied to ensure a smooth transition of the microgrid between the grid-connected mode and the islanded mode. To validate the effectiveness of this control strategy, the control model was built and simulated in PSCAD/EMTDC.</p></abstract>

Compared with other kinds of fuel cells, solid oxide fuel cell (SOFC) has been widely used in microgrids because of its higher efficiency and longer operation life. The weakness of SOFC lies in its slow response speed when grid disturbance occurs. This paper presents a control strategy that can promote the response speed and limit the fault current impulse for SOFC systems integrated into microgrids. First, the hysteretic control of the bidirectional DC-DC converter, which joins the SOFC and DC bus together, is explored. In addition, an improved droop control with limited current protection is applied in the DC-AC inverter, and the active synchronization control is applied to ensure a smooth transition of the microgrid between the grid-connected mode and the islanded mode. To validate the effectiveness of this control strategy, the control model was built and simulated in PSCAD/EMTDC.

Modelling and control of solid oxide fuel cell generation system in microgrid

State Key Laboratory of Power Transmission Equipment and System Safety and New Technology

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Modelling and control of solid oxide fuel cell generation system in microgrid"}

Compared with other kinds of fuel cells, solid oxide fuel cell (SOFC) has been widely used in microgrids because of its higher efficiency and longer operation...

Modelling and control of solid oxide fuel cell generation system in microgrid

Published Online: Jan 19, 2018

Page range: 405 - 414

Received: Jun 05, 2017

DOI: https://doi.org/10.1515/jee-2017-0075

Keywords
bidirectional DC-DC converter, fault current, microgrid, mode transition, solid oxide fuel cell (SOFC)

© 2017 Niancheng Zhou et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Modelling and control of solid oxide fuel cell generation system in microgrid

Published Online: Jan 19, 2018

Page range: 405 - 414

Received: Jun 05, 2017

DOI: https://doi.org/10.1515/jee-2017-0075

Keywordsbidirectional DC-DC converter, fault current, microgrid, mode transition, solid oxide fuel cell (SOFC)

© 2017 Niancheng Zhou et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
bidirectional DC-DC converter, fault current, microgrid, mode transition, solid oxide fuel cell (SOFC)