Abstract
In this paper, a chirp detector of the current waveforms is evaluated for locating the earth faults in unearthed MV networks where it is used to precisely localize the travelling wave arrival times created by the fault occurrence. Chirp modulation, or linear frequency modulation employs sinusoidal waveforms whose instantaneous frequency increases or decreases linearly over time. These waveforms are commonly referred to as linear chirps or simply chirps. Earth faults in unearthed MV networks will spark a chirp signal which is starting at a high frequency then gradually decreasing to a small frequency. A simple chirp detector is used to demodulate the frequency modulated waveform resulting in a signal peak which is used to locate the fault by a time of arrival method. The evaluation is carried out considering practical modelling of current transformer (CT) where the CT is modelled covering its high frequency characteristics. Also, the network noises are added to the simulated current waveforms. The simulation is performed in the ATP/EMTP program where it is pre-processed using ATPDraw.
| Original language | English |
|---|---|
| Title of host publication | 10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Managing the Change |
| Volume | 2010 |
| Edition | 558 CP |
| DOIs | |
| Publication status | Published - 2010 |
| Event | 10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Manchester, United Kingdom Duration: Mar 29 2010 → Apr 1 2010 |
Other
| Other | 10th IET International Conference on Developments in Power System Protection, DPSP 2010 |
|---|---|
| Country | United Kingdom |
| City | Manchester |
| Period | 3/29/10 → 4/1/10 |
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Keywords
- Earth Fault location
- frequency modulation
- travelling waves
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
Evaluation of chirp detector-based travelling wave localization of earth faults in MV networks. / Elkalashy, N. I.; Tarhuni, N. G.; Elhaffar, A. M.; Lehtonen, M.
10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Managing the Change. Vol. 2010 558 CP. ed. 2010.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Evaluation of chirp detector-based travelling wave localization of earth faults in MV networks
AU - Elkalashy, N. I.
AU - Tarhuni, N. G.
AU - Elhaffar, A. M.
AU - Lehtonen, M.
PY - 2010
Y1 - 2010
N2 - In this paper, a chirp detector of the current waveforms is evaluated for locating the earth faults in unearthed MV networks where it is used to precisely localize the travelling wave arrival times created by the fault occurrence. Chirp modulation, or linear frequency modulation employs sinusoidal waveforms whose instantaneous frequency increases or decreases linearly over time. These waveforms are commonly referred to as linear chirps or simply chirps. Earth faults in unearthed MV networks will spark a chirp signal which is starting at a high frequency then gradually decreasing to a small frequency. A simple chirp detector is used to demodulate the frequency modulated waveform resulting in a signal peak which is used to locate the fault by a time of arrival method. The evaluation is carried out considering practical modelling of current transformer (CT) where the CT is modelled covering its high frequency characteristics. Also, the network noises are added to the simulated current waveforms. The simulation is performed in the ATP/EMTP program where it is pre-processed using ATPDraw.
AB - In this paper, a chirp detector of the current waveforms is evaluated for locating the earth faults in unearthed MV networks where it is used to precisely localize the travelling wave arrival times created by the fault occurrence. Chirp modulation, or linear frequency modulation employs sinusoidal waveforms whose instantaneous frequency increases or decreases linearly over time. These waveforms are commonly referred to as linear chirps or simply chirps. Earth faults in unearthed MV networks will spark a chirp signal which is starting at a high frequency then gradually decreasing to a small frequency. A simple chirp detector is used to demodulate the frequency modulated waveform resulting in a signal peak which is used to locate the fault by a time of arrival method. The evaluation is carried out considering practical modelling of current transformer (CT) where the CT is modelled covering its high frequency characteristics. Also, the network noises are added to the simulated current waveforms. The simulation is performed in the ATP/EMTP program where it is pre-processed using ATPDraw.
KW - Earth Fault location
KW - frequency modulation
KW - travelling waves
UR - http://www.scopus.com/inward/record.url?scp=77956313648&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77956313648&partnerID=8YFLogxK
U2 - 10.1049/cp.2010.0314
DO - 10.1049/cp.2010.0314
M3 - Conference contribution
SN - 9781849192125
VL - 2010
BT - 10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Managing the Change
ER -