BAB III DATA DAN PEMBUATAN SIMULASI
3.1
Data Lengkap Sistem Distribusi Penyulang CPK19
Dalam membuat simulasi dan perhitungan, diperlukan data data, sebagai berikut, 3.1.1 Single Line Diagram Jaringan
Berikut adalah gambar single line diagram penyulang CPK19, dari sistem transmisi kemudian masuk pada trafo tenaga 150/20 kV dan selanjutkan ke jaringan distribusi tenaga listrik 20kV.
Gambar 3.1 Single line diagram jaringan CPK19
3.1.2 Data Sistem dan Jaringan Penyulang CPK19
Data Penyaluran sistem transmisi GI Cempaka trafo 7 pada saat beban puncak puncak tahun 2018. Bus Tegangan (kV) Isc Max Isc Min
: : : :
Trafo 7 150kV 7717 A 9229 A
Data trafo tenaga #7 Gardu Induk Cempaka. Kapasitas Impedansi trafo Tegangan primer Tegangan sekunder
: : : :
30MVA 12,8 % 150 kV 20kV 13
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14
Vektor Grup Belitan Belitan Delta In trafo NGR
: : : :
YNyn0d11 YNyn0d11 1 1732 A 40 ohm
Tabel 3.1 Data konduktor jaringan CPK19.
Zona
Jaringan
Jenis
A (mm2)
L (kms)
Beban (A)
L1
CPK19
AAAC
150
14
132
L2
AST01
AAAC
70
25
57
L2
AST02
AAAC
150
6,2
77
L3
Rcl danau
AAAC
150
5,6
30
L4
Rcl mangkalawat
AAAC
70
29,8
15
3.1.3 Data Setting OCR/GFR Eksisting Tabel 3.2 Data setting OCR/GFR eksisting
Uraian
INC
CPK19
AST01
AST02
RCL DSALAK
RCL MKLT
I > (A)
2040
300
100
120
60
30
t>
0.19
0.2
0.05
0.15
0.07
0.02
I >> (A)
6928
2070
1200
1200
800
200
Td (s)
0.4
0.1
0.07
0.07
0.04
0.02
Ie > (A)
60
30
20
25
15
10
te >
0.56
0.33
0.05
0.15
0.09
0.02
Ie >> (A)
BLOCK
300
200
220
150
80
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3.1.4 Data Impedansi Penghantar Tabel 3.3 Data impedansi penghantar
Konduktor R12
X12
R0
X0
Z1 = Z2 (Ω/km)
Z0 (Ω/km)
Jenis
mm2
AAAC
70
0.461
0.357
0.609
1.645
0,461 + j0,357
0,609 + j1,645
AAAC
150
0.216
0.331
0.363
1.618
0,216 + j0,331
0,363 + j1,618
AAAC
240
0.134
0.316
0.282
1.603
0,134 + j0,316
0,282 + j1,603
Tabel 3.4 Data impedansi kabel tanah
Konduktor Jenis
mm2
R (Ω/km s)
L XL (mH/k (Ω/kms) ms)
Z1 = Z2 = Z0 (Ω/km)
NA2XSEYBY
70
0.443
0.358
0.112
0,443 + j0,112
NA2XSEYBY
150
0.206
0.319
0.100
0,206 + j0,1
NA2XSEYBY
240
0.125
0.293
0.092
0,125 + j0,092
NA2XSEYBY
300
0.102
0.284
0.089
0,102 + j0,089
N2XSY
630
0.028
0.266
0.084
0,028 + j0,084
3.2
Pembuatan Singel Line Diagram untuk Simulasi pada Digsi
1.
Buka program power factor 15.1
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16
Gambar 3.2 Tampilan Tampilan utama ut ama pada Digsi
2.
Membuat project baru, dengan klik “File” “New” lalu ganti nama file sesuai dengan nama GI.
“Project”
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3.
Kemudian akan tampil lembar grid seperti gambar 3.4 dibawah untuk menggambar.
Lembar grid gr id SLD pada Digsi Gambar 3.4 Lembar 4.
Gambar busbar 150kV terlebih terlebih dahulu, untuk titik titik temu dari Grid Eksternal dan masukkan parameter busbar nya, isi pak nominal voltage yang digunakan.
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5.
Gambar External grid Gardu induk dan masukkan parameter untuk grid eksternal
Gambar 3.6 Eksternal grid SLD pada Digsi
Gambar 3.7 Setting eksternal grid SLD pada Digsi
Masukkan data MVA short circuit nya, max dan min values nya pada gardu induk induk tersebut.
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6.
Gambar busbar 20kV dan trafo tenaga 2 belitan 150kV / 20kV dan masukkan parameter parameter nya.
Trafo tenaga SLD pada Digsi D igsi Gambar 3.7 Trafo
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20
Gambar 3.9 Setting trafo tenaga SLD pada Digsi
Pada tab grounding/neutral conductr nya isikan besar NGR pada trafo apabila ada. 7. Buat Busbar 20 kV untuk section atau zona 2 sebagai titik temu dari bus 20kv GI, dan kemudian sambungkan dengan Line / kabel, lalu tambahkan device baru yaitu CT dan Relay dan masukkan parameter kabel, CB, CT, dan Relay
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Gambar 3.11 Setting line pada Digsi
Masukkan nilai reaktansi kabel pada type lalu klik tombol ke bawah, pilih new project type. Masukkan pangjang kms kms pada kabel yang digunakan.
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22
Gambar 3.13 Setting CT penyulang SLD pada Digsi
Untuk memasukkan nilai rasio CT, pada type tekan tombol ke bawah, lalu pilih new project type dan masukkan nilai rasio nya, kemudian akan muncul pada tab sebelumnya aitu primary dan secondary pada posisi tab berapa. berapa.
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OCR/GFR SLD pada Digsi Gambar 3.14 Setting relay OCR/GFR Untuk setting nilai setting OCR/GFR nya pada type tekan tombol bawah kemudian pilih new global project, dan pilih merk merk relay overcurrent yang ada. Masukkan setting OCR/GFR nya pada relay tersebut. 8.
Lanjutkan gambar section / zona zona yang lain dan masukkan parameter parameter Line, CB, CT dan relay nya sesuai dengan langkah diatas, maka akan menjadi gambar SLD sebagai berikut,
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