Decoupled frequency and voltage control for stand-alone microgrid with high renewable penetration

Kwang Woo Joung, Taewan Kim, Jung Wook Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In South Korea, the stand-alone microgrid on an island has synchronous diesel generators and multiple distributed generations (DGs) based on renewable energy and energy storage devices. According to the active policy of government to develop eco-friendly microgrids with zero carbon emission, many diesel generators in stand-alone microgrids are being replaced by the DGs. It brings challenges on the operation and control of multiple DGs because this causes the lack of inertia, which is originally provided from the diesel generators. This paper proposes a new decoupled frequency and voltage controller for DGs, which is able to keep the grid frequency and voltage magnitude constant. For frequency control, a frequency recovery control loop is newly added to conventional droop and inertia control loops for both the effective power sharing and stabilization of frequency response after a disturbance. For voltage control, the proposed controller regulates the grid voltage in an inertia-free mode, in which all diesel generators are disconnected, while providing the conventional reactive power-voltage droop control under a normal condition. As the result, the proposed controller can enhance the resilience and increase the penetration of renewable energies to the stand-alone microgrid. To verify the effectiveness of proposed controller, several case studies are carried out by using the practical data of a real stand-alone microgrid in South Korea.

Original languageEnglish
Title of host publication2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference, I and CPS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-8
Number of pages8
ISBN (Electronic)9781538610534
DOIs
Publication statusPublished - 2018 May 30
Event54th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2018 - Niagara Falls, Canada
Duration: 2018 May 72018 May 10

Publication series

NameConference Record - Industrial and Commercial Power Systems Technical Conference
Volume2018-May

Other

Other54th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2018
CountryCanada
CityNiagara Falls
Period18/5/718/5/10

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Joung, K. W., Kim, T., & Park, J. W. (2018). Decoupled frequency and voltage control for stand-alone microgrid with high renewable penetration. In 2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference, I and CPS 2018 (pp. 1-8). (Conference Record - Industrial and Commercial Power Systems Technical Conference; Vol. 2018-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPS.2018.8369983