Lightning rods in the Laboratory of Energy and Protection Distribution System of Ujung Pandang State Polytechnic are not functioning properly so the resistance resistance tends to be large, this is not good for earthing. This problem can be overcome by remaking lightning rods on wet and dry soils. This activity was carried out to reduce the value of resistance resistance in connection with this, this activity was carried out by designing, assembling and collecting data carried out by testing, while data analysis was carried out by counting. Based on the results of the discussion concluded that the resistance resistance value obtained is smaller than the previous device. Evidenced by the results of the test where the resistance value on the rod electrode in dry conditions ranged from 1.56 to 2.40 Ohm while the previous tool ranged from 1.6 to 9.0 Ohm. Then for wet soil conditions that range from 0.45 to 1.29 Ohm, while the previous tool is around 1.8 - 5.25 Ohm
The use of extra-high voltage lines can increase efficiency and reduce voltage drop but cause corona generation. Corona that occurs increases channeling losses and causes disruption to the environment in the form of Audible Noise (AN) and Radio Interference (RI). Audible Noise (AN) and Radio Interference (RI) that are too large will disturb the community around the transmission line. The use of a bundle conductor is a way to reduce the risk of corona. This paper discusses the effect of variations in the bundle conductor on noise interference and radio interference in 275kV extra-high-voltage air lines (SUTET). The types of variations include variations in the number of beams, variations in the distance between sub-conductors, and variations in diameter of the conductor. Next, the Audible Noise (AN) and Radio interference (RI) values are calculated for the Latuppa (Palopo) - Pomana channel planning. The results of the calculation of AN and RI values on SUTET 275kV are still included as safe criteria because the value is still below the criteria limits of Perry and SPLN 46-1-1981 concerning the Noise Level Limitation Guidelines and the IEEE Radio Noise Design Guide about the maximum limit of RI.
-This research proposed a tuning method of power system stabilizer (PSS) using an intelligent method based on flower pollination algorithm (FPA) on Pajalesang generator located in Soppeng district. The observed result is the deviation response of velocity and rotor angle in case of disturbance. The case study used as the disturbance to this generator system is a load addition of 0.05 pu. The results show that velocity deviation response without PSS is 0.01152 pu to -0.0248 pu, using PSS trial is 0.007014 pu to -0.02174 pu, using PSS bat algorithm is 0.003972 pu to -0.01865 pu, and using the proposed method of PSS flower algorithm is 0.002149 pu to -0.01678 pu. The rotor angle response shows better results with reduced oscillation and rapidly leading to the steady-state condition. I. PENDAHULUANFungsi pengontrol dalam operasi generator pada sistem tenaga listrik terletak pada governor dan eksiter di masing-masing generator. Namun, perangkat tersebut memiliki keterbatasan kinerja yang menyebabkan generator tidak dapat bekerja dengan optimal. Perubahan beban yang terjadi secara tiba-tiba dan periodik tidak dapat direspons dengan baik oleh generator sehingga dapat mempengaruhi kestabilan dinamik sistem. Respons yang kurang baik dapat menimbulkan osilasi frekuensi dalam periode yang lama. Hal itu dapat mengakibatkan pengurangan kekuatan transfer daya yang dapat diatasi menggunakan peralatan tambahan yang disebut power system stabilizer (PSS). Kontroler PSS ditambahkan pada pengatur tegangan otomatis (AVR). Fungsi dari eksiter, governor dan PSS ini adalah untuk mengatur frekuensi dan tegangan terminal secara lokal atau global pada masing-masing generator.Kestabilan dari sistem tenaga listrik yang ada, umumnya terdiri dari kestabilan keadaan tunak (steady state) dan kestabilan transient. Kestabilan transient dikaitkan dengan gangguan besar yang tiba-tiba terjadi, misalnya gangguan hubung singkat, pemutusan saluran, pemindahan atau pemutusan beban pada sistem. Kestabilan steady state berhubungan dengan kemampuan sistem tenaga listrik untuk kembali pada titik operasinya setelah gangguan kecil terjadi. Parameter sistem dikatakan stabil apabila seluruh variabel keadaannya stabil, yaitu frekuensi sistem, tegangan bus, atau sudut generator. Parameter *) Penulis korespondensi (Muhammad Ruswandi Djalal)
Prediction of electrical load on 150 kV Sulselrabar electrical system, analyzed using approach at night peak load using Fuzzy Logic based intelligent method. The peak load characteristics are certainly different from the load in normal time, therefore a special approach is needed to predict the peak night load. As input data will be used data of night peak load in 2010 until 2015, on the same day and date, each 4 days before day-H or day date which will be predicted load. For the data processing stage is divided into several stages, namely pre-processing, processing, and post-processing. The load data processing follows several procedures, ie computing WDmax, LDmax, TLDmax and VLDmax each year. Data processing is processed using excel software and then using Matlab software to run Fuzzy Logic. From the analysis results obtained, Error Prediction The peak evening load is very small that is equal to -0.070033687%. As comparison data used actual day-H data is April 2016. The graph of analysis result also shown in this paper.Keywords– Fuzzy Logic Control, Load Forecasting, Error, VLDmax
Penelitian ini dilakukan yaitu untuk mengetahui/menganalisa faktor-faktorapa saja yang dapat mempengaruhi produksi biogas limbah ternak sapi didalamsebuah digester, dimana ukuran digester yang digunakan yaitu dengan diameterdigester ± 2 m dan tinggi ± 2 m. Penelitian ini dilakukan di Kecamatan BarokoKabupaten Enrekang, menggunakan metode eksperimental dengan perlakuanpenambahan subtrat seperti Em4 kedalam campuran kotoran sapi dengan air dandengan melakukan perbandingan 1:2 dimana kotoran sapi lebih sedikit daripada air.Dalam penelitian ini penulis menggunakan alat ukur manometer U, Ph-meter danPenelitian ini bertujuan untuk mengetahui pengaruh penambahan Em4 danperbandingan 1:2 terhadap produksi biogas di Kecamatan Baroko KabupatenEnrekang. Hasil pengujian yang dilakukan menunjukkan bahwa penambahan Em4dapat meningkatkan peroduksi biogas dimana tekanan tertinggi terjadi pada hari ke-6dengan kenaikan tekanan mencapai 31.5 cm (kenaikan presure di malam hari).Sedangkan perbandingan 1:2 hasil penelitian menunjukkan adanya penurunanproduksi biogas. Hal ini dikarenakan kurangnya sumber makanan bagi bakteri-bakteripembentuk biogas.
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