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KOORDINASI RELE DIFFERENSIAL 87GT DAN RELE ARUS LEBIH 51/27 DI GENERATOR-TRANSFORMATOR TERHADAP GANGGUAN HUBUNG SINGKAT UNIT 3 PLTP GUNUNG SALAK Santosa, Budi; Qosim, Muchamad Nur; Husada, Hendrianto
Sutet Vol 5 No 1 (2015): JURNAL ILMIAH SUTET
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.157 KB) | DOI: 10.33322/sutet.v5i1.615

Abstract

The power plant has several components one of which is the Generator and Transformer which become the vital equipment in a power plant. Therefore from the reliability and sustainability of a generator and transformer is very dependent on the protection system used. In this studi discusses the adjustment of differential releases and more currents and coordination of both in the event of interference obtained from the data processing. The value of the adjusting current in the differential releases of 1.75 A with 0.2% mismatch and 6.3 A more current releases and the coordination between the differential releases and the overcurrent is limited by the delay time set on the overcurrent current with the TMS value of 0.159 and The greater the noise current the faster the working time of the relay provides a trip signal to the circuit breaker.
IMPLEMENTASI DAN PENGUKURAN LONG TERM EVOLUTION (LTE) DI JAKARTA DAN SEKITARNYA Qosim, Muchamad Nur
Sutet Vol 6 No 2 (2016): JURNAL ILMIAH SUTET
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3008.213 KB) | DOI: 10.33322/sutet.v6i2.566

Abstract

This study aims to determine how much readiness in implementing technology Long Term Evolution (LTE), a research model by using measurements in some areas and islands, especially in Jakarta, using a measuring instrument Agilent spectrum analyzer, and with the collection of data online and asked the parties concerned, here in particular with the Ministry of Communications or the Center for Monitoring (Balmon). Results from the study showed that the measurement, which can be no interference with other signals, are still in the corridor on the 2.3 GHz frequency range and the development of the 3GPP technology, with systems that LTE FDD and TDD can be accepted at 1G to 4G networks. LTE technology offers mobile data services in high-speed, reaching 100 Mbps for downlink and 50 Mbps on the uplink. And the measurement results of the average frequency is at 2,383 GH, its bandwidth 9.54 MHz and at the level of the signal - 65.07 dBm. The measurement results can be input to the government restrictions on devices that work in several different frequency bands to avoid interference with users and users between operators.
ANALISIS PENGARUH KABEL TANAH TERHADAP TRANSFER VOLTAGEDENGAN VARIASI LUAS PENAMPANG KABEL DAN JARAK GARDU Santoso, Budi; Qosim, Muchamad Nur; Azhari, Husnul Khatimah
Sutet Vol 6 No 1 (2016): JURNAL ILMIAH SUTET
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1103.968 KB) | DOI: 10.33322/sutet.v6i1.592

Abstract

Connection between substations and distribution substations using ground cables often occurs due to mechanical, thermal, and over voltage faults or due to defective or damaged materials. The disturbance flow will flow on metal parts of the equipment and also flow in the ground around the substation. The purpose and benefits of this study was to analyze the differences in the impedance value of the cable sheath at the distribution substation to the value of the voltage change (transfer voltage) dipengaruh by land lines, using data cable PT Sucaco Tbk, cable type of three core types NA2XSEBY with cross-section 70 mm2, 150 mm2, 240 mm2 and two substations are a substation a and substations b with different distances of 400m, 500m, 600m, 700m, and 800m, assumed soil resistivity is 100Ωm, with 1m cable burial depth. The greater the distance between the substation then the ratio of voltage increase at the source with the transfer voltage will be smaller, which for the cross-sectional area of the cable 70 mm2 with a distance of 400 m then kt 0.9098, while for a distance of 500 m of 0.88862, for 600 m of 0.8717 , For 700 m of 0.8112, and for 800 m to 0.7422. The bigger cross section of the ground cable, the greater the kt ratio, it is seen in the substation with a distance of 500m where the area of cross-sectional 70 mm2 then the big kt is 0.8862, while for 150 mm2 of 0.9207, and for 240 mm2to 0.9212.
EFISIENSI PEMBEBANAN PLTGU PT. KRAKATAU DAYA LISTRIK DENGAN PERHITUNGAN SPECIFIC FUEL CONSUMTION UNTUK MEMINIMALKAN BIAYA PRODUKSI LISTRIK Santoso, Budi; Qosim, Muchamad Nur; Ajiz, Fahmi Abdul
Sutet Vol 5 No 2 (2015): JURNAL ILMIAH SUTET
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.467 KB) | DOI: 10.33322/sutet.v5i2.596

Abstract

PT. Krakatau daya listirk (KDL) is a company engaged in the electrical power plant. Krakatau Daya Listrik power plant has a capacity of 3X40 MW that operate with natural gasfuel. Electrical production of PT. Krakatau Daya Listrik used to supply electricity to the entire industrial area of Krakatau, which is biggest customers is PT. Krakatau Stell (KS), Electrical supply from PT. Krakatau Daya Listrik Used to operate PT. Krakatau Stell for electrical arc furnace. The steel smelting process required enormous power and fluctuate greatly, resulting in a loadchange that varies greatly in Krakatau Daya Plant. The load change can affect and Krakatau Daya Listrik Power plant efficiency, it is the increase in powerplant fuel consumtion. This paper will calculated the fuel that influenced by the changes of power plant efficiency of PT. Krakatau Daya Listrik.