Protection coordination of voltage weak DC distribution grid

Concepts

Conference paper (2016)

Authors

T.G. Hailu DC systems, Energy conversion & Storage - EEMCS
L.J. Mackay DC systems, Energy conversion & Storage - EEMCS
Mladen Gagic DC systems, Energy conversion & Storage - EEMCS
Jan Abraham Ferreira ESE Programmes - EEMCS
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Fault detection Capacitors Transient analysis Circuit breakers Fault currents Electrical fault detection
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Published Date

2016-12

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Distributed Generation has created the need for new types of smart dc grids developments. The multiple generation sources, bi-directional power flow, power flow time co-ordination and management bring significant benefits as well as challenges for current ac electrical grids and emerging dc microgrids. In particular, the effect of voltage weak distribution systems on protection concepts and approaches needs to be understood, investigated, and accounted for. This paper describes principles of protection of voltage weak dc grid concepts. New alternative protection designs are proposed and their benefits and challenges are discussed. Likewise, special circuit configurations are proposed to improve fault discrimination. Fault-induced voltage transients are used to detect and isolate faulty part of the dc distribution grid.