Modifikasi Algoritma Digital Phase Locked Loop Untuk Mengatasi Kondisi Unbalance Pada Pengukuran Sudut Fasa, Frekuensi, dan Amplitudo Tegangan Listrik Tiga Fasa = Modified Digital Phase Locked-Loop Algorithm for Measurement of Phase Angles, Frequency, and Amplitude in Unbalance Condition of the Three-Phase Grid Voltage - Moch. Imam Afandi, author (2012)