Abstract
Micro-grids fed with small synchronous generators and intermittent renewable power sources are generally considered as weak power grids unless very large energy storages are incorporated as the energy buffer. Auxiliary techniques are needed to improve their stability when transient interrupts occur. In this paper, the 3-ph Electric Spring (ES) is studied to improve the stability of the micro-grid in transient operations. The power compensation characteristics of the 3-ph ES are firstly analyzed. The linear relationships between decoupled d and q components of ES voltage and real and reactive power of smart load enable the ES to conduct frequency and voltage regulation simultaneously. The f-V esd and V-V esq droop control is further developed to coordinate the operation of multiple ESs distributed along a distribution line. The transient stability issues of the micro-grid under study are analyzed in detail. Simulation results show that the 3-ph ES implemented with f-V esd and V-V esq droop control can react swiftly to fast transient changes of micro-grids including intentional islanding, unintentional islanding, and sudden load changes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
