Conventional P -?/ Q-V Droop Control in Highly Resistive Line of Low-Voltage Converter-Based AC Microgrid

Xiaochao Hou, Yao Sun, Wenbin Yuan, Hua Han, Chaolu Zhong and Josep M. Guerrero
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Xiaochao Hou: School of Information Science and Engineering, Central South University, Changsha 410083, China
Yao Sun: School of Information Science and Engineering, Central South University, Changsha 410083, China
Wenbin Yuan: School of Information Science and Engineering, Central South University, Changsha 410083, China
Hua Han: School of Information Science and Engineering, Central South University, Changsha 410083, China
Chaolu Zhong: School of Information Science and Engineering, Central South University, Changsha 410083, China
Josep M. Guerrero: Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark

Energies, 2016, vol. 9, issue 11, 1-19

Abstract: In low-voltage converter-based alternating current (AC) microgrids with resistive distribution lines, the P - V droop with Q - f boost (VPD/FQB) is the most common method for load sharing. However, it cannot achieve the active power sharing proportionally. To overcome this drawback, the conventional P -?/ Q - V droop control is adopted in the low-voltage AC microgrid. As a result, the active power sharing among the distributed generators (DGs) is easily obtained without communication. More importantly, this study clears up the previous misunderstanding that conventional P -?/ Q - V droop control is only applicable to microgrids with highly inductive lines, and lays a foundation for the application of conventional droop control under different line impedances. Moreover, in order to guarantee the accurate reactive power sharing, a guide for designing Q - V droop gains is given, and virtual resistance is adopted to shape the desired output impedance. Finally, the effects of power sharing and transient response are verified through simulations and experiments in converter-based AC Microgrid.

Keywords: droop control; low-voltage alternating current (AC) microgrid; power sharing; small signal stability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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