PERANCANGAN PROTEKSI TERHADAP UNDERVOLTAGE PADA BUSBAR POWER DISTRIBUTION CONTROL GTG 400 V BLOK 2 DENGAN MENGGUNAKAN RELAY BE1-27 PT. INDONESIA POWER UP SEMARANG

M PUTUT TRIANGGA, Nur Sulistyawati, S.T., M.T

2016 | Tugas Akhir | D3 TEKNIK ELEKTRO SV

Heat Recovery Steam Generator merupakan bagian yang penting dalam sistem pembangkit Steam Turbine Generatoruntuk meningkatkan nilai efisiensi. Jika Heat Recovery Steam Generator mengalami shutdown, dapat dipastikan produksi listrik dari Steam Turbine Generator akan menurun. Heat Recovery Steam Generator dapat shutdown di antaranya akibat dari motor High Pressure Circulation trip karena mendapat suplai undervoltage.Undervoltage dapat terjadi saat generator mengalami overload,sehingga suplai untuk busbar Power Distribution Control GTG Unit akan mendapatkan undervoltage. Untuk menghindari busbar Power Distribution Control GTG Unit mengalami undervoltage dapat menggunakan relay undervoltage dengan proses transfer switch dari suplai oleh generator melalui 52 UAT ke suplai oleh jaringan luar melalui 52 PDC.

Heat Recovery Steam Generator is the essential part of system in Steam Turbine Generator power plant for the highest efficiency. If Heat Recovery Steam Generator interrupted, it will decreasing the efficiency of power plant and could made unit shutdown because supply energy in Heat Recovery Steam Generator was undervoltage. Undervoltage happened while generator got overload. It will effected the busbar Power Distribution Control GTG Unitthatin charge of essential part to support Heat Recovery Steam Generator got undervoltage supply. For the preventive action, it could use undervoltage relay for transfer switch from 52 UAT to 52 PDC.

Kata Kunci : Heat Steam Recovery Generator, Steam Turbine Generator, Undervoltage, busbar Power Distribution Control GTG Unit, undervoltage relay.