Protection of converter dominated MV microgrid using changes in current's phase angle
Artikel i vetenskaplig tidskrift, 2021

Converter interfaced distributed generations in a microgrid feed the modulated current of limited magnitude during fault conditions. The protection design and its operation are thus challenging due to limited fault current which is further reduced by Petersen coil grounding in medium-voltage (MV) level. This paper aims to address this challenge by developing a current-only directional relay algorithm for the protection of converter dominated MV
microgrid with Petersen coil grounding. The relay’s operating principle is based on the sign of the change in phase angle of the fault current with respect to the prefault which indicates the direction of fault. The negative and positive changes in current’s phase angle determine the fault in forward and reverse direction, respectively. The tripping decision is derived by comparing the binary output of the relay at both ends of the line segment under protection. This requires a simple, flexible and low bandwidth communication channel. Both theoretical analyses and simulation studies have been performed on a typical distribution grid intended to be operated as microgrid. The proposed protection method is suitable for microgrid having the converters with and without reactive power support. Various operating conditions are evaluated, including bidirectional power flow, high resistance fault,
different fault types, loading conditions and signals with noise.

phase angle

distribution system

microgrid

protection

power electronic converter

Författare

Rabindra Mohanty

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

Peiyuan Chen

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

Anh Tuan Le

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

IET Generation, Transmission and Distribution

1751-8687 (ISSN) 1751-8695 (eISSN)

ENABLING FLEXIBILITY FOR FUTURE DISTRIBUTION GRID (FLEXIGRID)

Europeiska kommissionen (EU) (864048), 2019-11-01 -- 2023-04-30.

Communication-assisted protection in converter dominated medium-voltage microgrids, part 2

Chalmers, 2020-01-01 -- .

Communication-assisted protection in converter dominated medium-voltage microgrids

Chalmers, 2019-01-01 -- .

Kontroll och stabilitet av maskade mikronät med kommunikationsfel(EM SamspEL Micronät)

Energimyndigheten (2016-007912), 2017-01-01 -- 2020-12-31.

Styrkeområden

Energi

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1049/gtd2.12317

Relaterade dataset

DOI: 10.1049/gtd2.12317

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Senast uppdaterat

2021-10-12