Abstract
technique utilises the rate-of-change (R-o-C) of the associated travelling wave components following the occurrence of
a fault to determine whether the fault is internal or external. For an internal fault, the product of the magnitude of the Ro-
C of the fault induced voltage and current travelling wave following fault inception must exceed a predetermined
setting, otherwise the fault is external. The DC inductor located at the cable ends provides attenuation for the high
frequency contents resulting from an external fault. The ratio between the forward voltage travelling waves and the
backward voltage travelling wave provides directional discrimination. This ratio is less than unity for a forward
directional fault and greater than unity for reverse directional faults. The protection algorithm has been validated using
PSCAD/EMTDC simulations based on full scale modular multilevel converter (MMC) - based HVDC grid. The
simulation results presented, including the performances indices compared to existing and proposed methods
available in literature shows the suitability and reliability of the proposed technique in distinguishing between internal
and external faults. Key advantages of the proposed technique is that it simple, easily implemented, and does not rely
on complex signal processing technique; and therefore it can easily be implemented to provide autonomous tripping
for all relays located on the DC grid
| Language | English |
|---|---|
| Article number | SEGAN_2018_394 |
| Pages | (In-Press) |
| Number of pages | 25 |
| Journal | Sustainable Energy, Grids and Networks |
| Volume | (In-Press) |
| Early online date | 14 Feb 2019 |
| State | E-pub ahead of print - 14 Feb 2019 |
Fingerprint
Keywords
- DC grid protection
- internal and external fault
- transient based protection
- fault induced travelling wave
- rate-of-change (R-o-C) of travelling wave
ASJC Scopus subject areas
- Engineering(all)
- Energy(all)
Cite this
A transient and non-unit-based protection technique for DC grids based on the rate-of-change (R-o-C) of the fault induced travelling wave components. / Ikhide, Monday; Tennakoon, Sarath; Ha, Hengxu; Griffiths, Alison; Subramanian, Sankara; Adamczyk, Andrzej.
In: Sustainable Energy, Grids and Networks, Vol. (In-Press), SEGAN_2018_394, 14.02.2019, p. (In-Press).Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A transient and non-unit-based protection technique for DC grids based on the rate-of-change (R-o-C) of the fault induced travelling wave components
AU - Ikhide,Monday
AU - Tennakoon,Sarath
AU - Ha,Hengxu
AU - Griffiths,Alison
AU - Subramanian,Sankara
AU - Adamczyk,Andrzej
PY - 2019/2/14
Y1 - 2019/2/14
N2 - This paper presents a transient and non-unit-based protection scheme for consideration in DC grids of the future. Thetechnique utilises the rate-of-change (R-o-C) of the associated travelling wave components following the occurrence ofa fault to determine whether the fault is internal or external. For an internal fault, the product of the magnitude of the Ro-C of the fault induced voltage and current travelling wave following fault inception must exceed a predeterminedsetting, otherwise the fault is external. The DC inductor located at the cable ends provides attenuation for the highfrequency contents resulting from an external fault. The ratio between the forward voltage travelling waves and thebackward voltage travelling wave provides directional discrimination. This ratio is less than unity for a forwarddirectional fault and greater than unity for reverse directional faults. The protection algorithm has been validated usingPSCAD/EMTDC simulations based on full scale modular multilevel converter (MMC) - based HVDC grid. Thesimulation results presented, including the performances indices compared to existing and proposed methodsavailable in literature shows the suitability and reliability of the proposed technique in distinguishing between internaland external faults. Key advantages of the proposed technique is that it simple, easily implemented, and does not relyon complex signal processing technique; and therefore it can easily be implemented to provide autonomous trippingfor all relays located on the DC grid
AB - This paper presents a transient and non-unit-based protection scheme for consideration in DC grids of the future. Thetechnique utilises the rate-of-change (R-o-C) of the associated travelling wave components following the occurrence ofa fault to determine whether the fault is internal or external. For an internal fault, the product of the magnitude of the Ro-C of the fault induced voltage and current travelling wave following fault inception must exceed a predeterminedsetting, otherwise the fault is external. The DC inductor located at the cable ends provides attenuation for the highfrequency contents resulting from an external fault. The ratio between the forward voltage travelling waves and thebackward voltage travelling wave provides directional discrimination. This ratio is less than unity for a forwarddirectional fault and greater than unity for reverse directional faults. The protection algorithm has been validated usingPSCAD/EMTDC simulations based on full scale modular multilevel converter (MMC) - based HVDC grid. Thesimulation results presented, including the performances indices compared to existing and proposed methodsavailable in literature shows the suitability and reliability of the proposed technique in distinguishing between internaland external faults. Key advantages of the proposed technique is that it simple, easily implemented, and does not relyon complex signal processing technique; and therefore it can easily be implemented to provide autonomous trippingfor all relays located on the DC grid
KW - DC grid protection
KW - internal and external fault
KW - transient based protection
KW - fault induced travelling wave
KW - rate-of-change (R-o-C) of travelling wave
M3 - Article
VL - (In-Press)
SP - (In-Press)
JO - Sustainable Energy, Grids and Networks
T2 - Sustainable Energy, Grids and Networks
JF - Sustainable Energy, Grids and Networks
M1 - SEGAN_2018_394
ER -