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ANALISIS HUBUNG SINGKAT PARALEL EMPAT TRAFO IBT 500/150 KV 500 MVA GITET KEDIRI

AMMER : JOURNAL OF ACADEMIC & MULTIDICIPLINE RESEARCH

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Title ANALISIS HUBUNG SINGKAT PARALEL EMPAT TRAFO IBT 500/150 KV 500 MVA GITET KEDIRI
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Creator ABDY CAHYA, MUHAMMAD WAHYU
Rizal, Royb F
Yumono, Fajar
 
Description Extra High Voltage Substation (GITET) Kediri is an electrical substation that serves 500, 150, and 20 kV systems. GITET Kediri in 2015 has three Inter Bus Transformers (IBT) 500/150 kV with each capacity of 500 MVA, then in 2020 there an addition of the same IBT. But, the 150 kV side has been configured since 2017. According to the IEC 60076-1 standard table 1.6 about parallel operation of the transformer, four IBTs are still eligible because the difference in impedance values ​​is ±7.5% (3.3%, 13.16%, 14.452%, and 14.375%). Breaking capacity of circuit breaker IBT 1,2,4 - 150 kVs, Kertosono, Jayakertas, Tulungagung 1&2, Banaran 1&2, Transformer 1, Coupler 1&2, Section A&B are 40 kA and for IBT 3 - 150 kV & Transformer 2 are 50 kA. Simulation and calculation current of parallel short circuit of four IBT for three phases are 26.978 and 26.548 kA, phase to ground are 29.659 and 30.097 kA, phase to phase are 23.363 and 23.066 kA, phase-phase to ground are 28.374 and 28.924 kA (phase AB) & 28,788 and 28,996 kA (phase BC). Based on that analysis, four IBTs can be parallel because it meets the difference in impedance and all of the 150 kV circuit breaker is feasible to operate because the fault current is smaller than the circuit breaker capacity
Gardu Induk Tegangan Ekstra Tinggi (GITET) Kediri merupakan gardu induk yang melayani sistem 500 kV, 150 kV, dan 20 kV. GITET Kediri pada tahun 2015 memiliki tiga Inter Bus Transformator (IBT) 500/150 kV dengan kapasitas masing-masing 500 MVA, lalu pada tahun 2020 ada penambahan satu IBT yang sama. Sedangkan sisi 150 kV sudah terkonfigurasi sejak tahun 2017. Menurut standar IEC 60076-1 tabel 1.6 operasi paralel trafo, empat IBT masih memenuhi syarat karena selisih nilai impedansinya ±7,5% (3,3%, 13,16%, 14,452%, dan 14,375%). Data breaking capacity PMT IBT 1,2,4 - 150 kV, Kertosono, Jayakertas, Tulungagung 1&2, Banaran 1&2, Trafo 1, Kopel 1&2, Section A&B sebesar 40 kA dan untuk IBT 3 - 150 kV, Trafo 2 sebesar 50 kA. Arus simulasi dan perhitungan hubung singkat paralel empat IBT untuk tiga fasa yaitu sebesar 26,978 dan 26,548 kA, satu fasa ke tanah yaitu 29,659 dan 30,097 kA, fasa-fasa yaitu 23,363 dan 23,066 kA, fasa-fasa ke tanah yaitu 28,374 dan 28,924 kA (fasa AB) & 28,788 dan 28,996 kA (fasa BC). Berdasarkan analisis tersebut, empat IBT dapat diparalel karena   memenuhi   selisih  nilai  impedansi dan untuk semua PMT 150 kV masih layak dioperasikan karena arus gangguan lebih kecil dari kapasitas PMT
 
Publisher AMMER : JOURNAL OF ACADEMIC & MULTIDICIPLINE RESEARCH
AMMER : JURNAL OF ACADEMIC & MULTIDICIPLINE RESEARCH
 
Date 2021-10-02
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://ejournal.uniska-kediri.ac.id/index.php/ammer/article/view/1875
 
Source AMMER : JOURNAL OF ACADEMIC & MULTIDICIPLINE RESEARCH; Vol 1 No 01 (2021): September 2021; 08 - 14
AMMER : JURNAL OF ACADEMIC & MULTIDICIPLINE RESEARCH; Vol 1 No 01 (2021): September 2021; 08 - 14
 
Language eng
 
Relation https://ejournal.uniska-kediri.ac.id/index.php/ammer/article/view/1875/1274