Prof.Dr. . Reynaldo . Zoro. . Dr. Syarif Hidayat, Tulus Leo. Lightning Research Center . School of Electrical Engineering and Informatics. Institute . Technolog. i. Bandung. (ITB), . Indonesia. email@example.com. ID: 526403
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Lightning Protection for Medium Voltage Overhead Distribution Lines in High Lightning Density Area
. Dr. Syarif Hidayat, Tulus Leo
Lightning Research Center
School of Electrical Engineering and Informatics
Lightning in Tropics
Lightning Protection for MV Lines
The goal of this research is to minimize the disturbance on MV line in the area with high lightning density in Serpong area
the years several tripping and conductor damages occur due to lightning strikes.
solutions have been evaluated over the years which can improve line performance against lightning strikes such as installation of overhead ground wire and the relocation of lightning arrester.Slide4
Indonesia; Maritime Continent
St. Petersburg, Rusia
Java Island & Bali
for Java Island
Recorded from JADPENSlide7
Reseach Area ; Serpong
Lightning Measurement Station
Mnt. Tangkuban Perahu +2023 mSlide8
West Java Lightning Flash Density (Ng)
for West Java
Lightning Measurement Station
Mnt Tangkuban PerahuSlide9
GFD for Serpong Area on 20 x 20 km2 window
Ng is around = 15-40 strike/km2/yrSlide11
Monthly Variant of Lightning Activity in Serpong AreaSlide12
Protection of MV Overhead line
Metal Oxide Arrester
Protection of 20 kV Lines in Indonesia by using;
Overhead Ground Wire
OHGW reduce induction up to
2 OHGW reduce the induction up to 66
Multi Chamber System (MCS)
base of multi chamber arresters (MCA),
comprises a large number of electrodes mounted in a length of silicon rubber.
drilled between the electrodes and going through the length act as miniature gas discharge chambers.Slide15
Fig. 1. Multichamber system (MCS): (a) Diagram showing the discharge onset instant. (b) Diagram showing the discharge end instant. 1) silicon rubber length, 2) electrodes, 3) arc quenching chamber, and 4) discharge channel.Slide16
Multi Chamber System (MCS)
When a lightning overvoltage impulse is applied to the arrester, it breaks down gaps between electrodes.
between electrodes occur inside chambers of a very small volume; the resulting high pressure drives spark discharge channels between electrodes to the surface of the insulating body and, hence, outside into the air around the arrester.Slide17
Fig 2. Spark discharge occurs into the air around the Multi chamber arresters installation 20-kV lines.Slide18
Serpong lines characteristics
20 kV feeder, called “
region has been chosen to be equipped with the multi-chamber arresters. The choice is determined due to highest lightning outage of the
have been recorded through this logger at substation and
as shown on table 1. It can be noted that in total of 40 to 60 outages took place every year on these lines.
outages recorded per 100km per year at feeder KDS4 and feeder SR20 is 120 outages.Slide19
Table 1. Trips records on switchgear from substation and reclosers of feeders.
Table 2. Data of the research location which are equipped by arrester on SR20 and KDS4 feeders.Slide20
Fig 3. 20kV lines of feeder SR20 and feeder KDS4.Orange Color is the vicinity area, and in blue color is the whole research area.Slide21Slide22
Installation of Arresters
20 October and 19 November 2013, a total of 44 arresters have been installed in the vicinity area.
arrester was shown in Fig 4, one arrester per pole is installed on alternate phases.
arrester has been installed on poles that were not equipped with gapped or gapless metal oxide arresters (MOA).
was simply mounted on the cross arm using standard metal fitting.Slide23
Fig 4. Multi-Chamber Arresters installed on alternate phases, one piece per poleSlide24
Before Installation of
After Installation of
Before Installation of MCA
data for this research derived from BMKG, (
) or Indonesia Weather Service Office
2013, 601 days, 90 trips were observed on KDS4 and SR20 feeder on more than 55 days. Lightning activity over the related days were
and analyzed. It can be seen that only from 55 days of lightning, lightning activity in vicinity of the substation can reach
17,07 ground flashes per square kilometer per year
Table 4. Lightning activity during 54 days from 27 Feb 2012 to 20 Oct 2013
Table 5. Lightning occurrence at time of
After Installation of Arresters
Weather Station Office of Indonesia
data during the period of installation there is ground flash density was around
15 ground flashes per square kilometer per year
the overall area, only 7 occurrences were observed after installation of Multi-Chambers Arresters.
of occurrence of lightning and trips per 100km of circuit per year decreased from 29 before installation to 12 after installation of
, preventing more than 50% of outages.Slide28
Table 6. Lightning occurrence at time and day of distribution lines tripsSlide29
Operability of Multi-chamber arrester on 20kV Networks
More than 354 days after installation no increase nor excessive outages number were observed. Table 3 shows a reducing of trips per 100km of lines.
Table 3. Trips records before and after installation of Multi-Chambers ArrestersSlide30
During the period of installation of MCA (2013 – 2014) the ground flash density was around 15 ground flashes per square kilometer per year compared to 17.07 GFD before (2012 -2013).
Arresters operated 11 times and had a positive effect on the protection of the 20 kV overhead line by reducing number of trips.
Research results shows that MCA contributed to improve line performance by 50% against lightning strikes.
this research period and distribution line did not suffer from any nuisance tripping.