LAPSE:2018.1175
Published Article
LAPSE:2018.1175
State of Charge-Based Active Power Sharing Method in a Standalone Microgrid with High Penetration Level of Renewable Energy Sources
Yun-Su Kim, Chul-Sang Hwang, Eung-Sang Kim, Changhee Cho
December 3, 2018
Standalone microgrids, which are mainly constructed on island areas have low system inertia, may result large frequency deviations even for small load change. Moreover, increasing penetration level of renewable energy sources (RESs) into standalone microgrids makes the frequency stability problem even worse. To overcome this problem, this paper proposes an active power sharing method with zero frequency deviations. To this end, a battery energy storage system (BESS) is operated as constant frequency (CF) control mode, whereas the other distributed generations (DGs) are operated as an active and reactive power (PQ) control mode. As a result, a state of charge (SOC) of the BESS is changed as the system load varies. Based on the SOC deviation, DGs share the load change. The SOC data is assumed to be sent via communication system, hence the communication time delay is considered. To enhance reliability, controllers of DGs are designed to take account of the failure of communication system. The simulation results show that active power can be shared among DGs according to desired ratio without frequency deviations even for large variation of output power of RESs.
Keywords
constant frequency (CF), renewable energy source, standalone microgrid, state of charge (SOC)-based active power sharing, zero frequency deviation
Suggested Citation
Kim YS, Hwang CS, Kim ES, Cho C. State of Charge-Based Active Power Sharing Method in a Standalone Microgrid with High Penetration Level of Renewable Energy Sources. (2018). LAPSE:2018.1175
Author Affiliations
Kim YS: Korea Electrotechnology Research Institute, Changwon 51543, Korea
Hwang CS: Korea Electrotechnology Research Institute, Changwon 51543, Korea
Kim ES: Korea Electrotechnology Research Institute, Changwon 51543, Korea
Cho C: Korea Electrotechnology Research Institute, Changwon 51543, Korea
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Journal Name
Energies
Volume
9
Issue
7
Article Number
E480
Year
2016
Publication Date
2016-06-23
Published Version
ISSN
1996-1073
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PII: en9070480, Publication Type: Journal Article
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LAPSE:2018.1175
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doi:10.3390/en9070480
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Dec 3, 2018
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CC BY 4.0
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Dec 3, 2018
 
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Original Submitter
Calvin Tsay
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