Anti Surge Control of Centrifugal Compressor at PT. Pertamina EP Asset 2 Field Pendopo Muhammad L. Hakim, Balza Achmad and Juwari P. Sutikno E3S Web Conf., 42 (2018) 01010 Published online: 29 June 2018 DOI: 10.1051/e3sconf/20184201010