KRL Lightning Protection System Network of Catenary Electricity Units Top Flow at The UPT Resort Region of Pasar Senen, Jakarta
Abstract
The modes of transportation are currently very diverse with the development of an area and mass transportation is an absolute solution to the problem of congestion in urban areas. In metropolitan Jakarta, the Electric Rail Train (KRL) moves through several stages, starting from the supply of a 20 kV AC PLN distribution substation adjacent to the KAI traction substation and then being lowered through the KAI traction substation stepdown transformer to 1200 V AC. The AC power is then converted to DC using a silicon rectifier, and finally generates a voltage of 1500 V DC which supplies the KRL from the traction substation via Overflow Electricity (LAA) with a catenary network transmission that runs across the top along the KRL route. LAA technical problems, called equipment malfunctions, causes train travel disruptions resulting in crossing and overcoming transfers, trip cancellations or delays of 10 minutes or more. This is due to damage to the catenary network, so certain sections of the road cannot be finally passed by KRL. The catenary network must then be safeguarded with protective facilities to secure other catenary network equipment from damage due to lightning strikes and induction. This study maximizes the protection system on the catenary network in the area of the Technical Service Unit (UPT) Resort LAA 1.7 Pasar Senen PT KAI (Persero) Operation Area 1 Jakarta and is expected to be a reference for railway infrastructure employees of the LAA unit. There are, 3 methods used, namely the method of observation, interviews, and literature study. The results showed that the optimum OHGW (overhead ground wire) angle of protection for the concrete/pole type was 67.45Ëš, while the iron pole was 65.95Ëš and both met the requirements for the protection angle of 65Ëš-68Ëš. However, the distance for grounding the catenary network poles on existing poles that are installed every 5 poles and is 250 m apart needs to be renovated to avoid induced voltage disturbances and high lightning strikes and hence endangering humans and surrounding equipment. Finally, to avoid cases of theft of the copper grounding rod and its down conductor, it is necessary to install a new grounding rod made of iron.
Keywords: Traction substation, catenary network, lightning protection system.
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