MENGKAJI KETERSEDIAAN SISTEM DC DI GAS INSULATED SUBSTATION (GIS) SENAYAN

DC resources on a GIS have a very important role for move the PMT when a disturbance occurs. DC system of 110 V in GIS Senayan there are 2 units that are supplied by rectifier 380V. The load supplied is an essential load that is 110 V DC load divided into 2 main DC. Performance on the battery is still in the condition above 60%, where the battery is still said in good condition that is when the last battery capacity test in 2019 in a percentage condition 72% in units 1 and 64% in Unit 2. With a battery capacity of 220.5 Ah in units 1 and 197.8 Ah in Unit 2 can supply loads in the state of 61 A when the year 2019 produce battery usage for 3.2-3.6 hours, while with a load of real units 1 and Unit 2 of 5 A to 10 A can generate longer battery usage for 22 hours to 39.5 hours. DC Ground disruption that occurs at GIS Senayan resulted in DC system working in short time or quickly depleted. Ground DC interference was found on the control panel of the Trafo 3 Bay and the Danayasa Bay in Terminal B50. X1 No. 14, with voltage +0.7 V,-118 V. DC Ground in GIS Senayan done Repair is by opening the cable from the terminal and cut the wires that are too long and not neat, after the neatly clipped and then reworked the part of the fibers with the meeting and plug it back into the terminal so that it does not open and not connected to the Ground again, and after repaired normal return voltage of +65 V, -52 V.