PENGARUH GANGGUAN HUBUNG SINGKAT 1 FASAKE TANAH TERHADAP KINERJA ALTERNATOR
DOI:
https://doi.org/10.31851/ampere.v2i1.1206Abstract
ABSTRAK
Pelayanan energi listrik hingga sampai ke konsumen tidak lepas dari gangguan. Sebagian besar gangguan yang terjadi merupakan gangguan tidak seimbang (tidak simetris), yang terdiri dari gangguan 1 fasa ke tanah, dua fasa ke tanah dan gangguan fasa ke fasa. Gangguan tidak seimbang yang terjadi pada busbar dapat menyebabkan: kerusakan pada alternator, berkurangnyabatas-bataskestabilansuatusistemtenaga, rusaknyaperalatan danteganganrendah yang disebabkanolehhubungsingkat, ledakan-ledakan yang mungkinterjadipadaperalatanyang mengandungminyakisolasi, danterpecahnyadaerahpelayanankarenarentetantindakanpengamananoleh system proteksi yang berbeda – beda yang dikenalsebagai “cascadingâ€. Oleh karena itu, dilakukan perhitunganbesar arus gangguan 1 fasaketanah, didapat : -j1,216 kA, tegangan-tegangan antar saluransaatgangguan 1 fasaketanah yang nilainya Vab = 8,8 38,80  kV, Vbc = 11 -87,6690  kV, Vca = 9,1 -37,040  kV. Waktu yang diizinkan generator beroperasidalamkeadaangangguanhubungsingkat 1 fasaketanahadalah :134,23 detik
Kata kunci :Gangguan, Alternator, Komponen simetris.
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