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"The main contribution of this article is the mapping of the electric fields in transmission power lines using the Charge Simulation Method (CSM), combined with an embedded system. In this research, a computational routine was written in MATLAB®. The electric field intensity is calculated at a 1 meter height on right-of-way and between towers. The mapping is performed for a space between towers and considers that the maximum arrow of the conductors occurs in the middle of this distance, what provides a computational result where the profile of the electric field can be analyzed. The bundle conductor height varies along the distance between towers in order to improve the values of the calculated field. The results can be seen in different graphics (three-dimensional, bi-dimensional, a slice of the field and others). Charge Simulation Method is a power tool for calculating intensity field of high voltage systems, so this is a motivation for the use of the method. A series of detectors are used to obtain the data of the voltage that is provided to the load. These data are captured by a microcontroller and transmitted to the operational center. Using this data, the measure of the field is possible."

"The main contribution of this article is the mapping of the electric fields in transmission powerlines using the Charge Simulation Method (CSM), combined with an embedded system. In this research, a computational routine was written in MATLAB®. The electric field intensity is calculated at a 1 meter height on right-of-wayand between towers. The mapping is performed for a space between towers and considers that the maximum arrow of the conductors occurs in the middle of this distance, what provides a computational result where the profile of the electric field can be analyzed. The bundle conductor height varies along the distance between towers in order to improve the values of the calculated field. The results can be seen in different graphics (three-dimensional, bi-dimensional, a slice of the field and others). Charge Simulation Method is a power tool for calculating intensity field of high voltage systems, so this is a motivation for the use of the method. A series of detectors are used to obtain the data of the voltage that is provided to the load. These data are captured by a microcontroller and transmitted to the operational center. Using this data, the measure of the field is possible."

"Sistem proteksi adaptif merupakan salah satu alternatif koordinasi rele yang dapat disesuaikan dengan perubahan keadaan sistem transmisi (on-line) memungkinkan pengamanan yang lebih efektif dan efisien. Konsep adaptif dapat mencegah rele dari kegagalan operasi yang disebabkan oleh efek reaktansi. Konsep ini dibuat sebagai pengukuran standar dari saluran ganda, misalnya adanya tegangan dan arus tiga fasa dari saluran yang terganggu dan pertambahan arus urutan nol dari saluran yang baik digunakan sebagai sinyal masukan rele. Konsep ini berdasarkan perubahan posisi dari karakteristik rele jarak sehingga diperlukan kompensasi terhadap efek dari reaktansi. Oleh karena itu diperlukan sebuah vektor geser yang ditetapkan pada perhitungannya.

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An adaptive distance protection system is an alternative coordination relay that can appropriated with the changes of condition transmission system which can make more effective and efficient. An Adaptive algorithm allowing one to prevent the relay from mis- or mal-operation caused by the reactance effect. The algorithm is designed for a standard availability of measurements from one-end of the double-circuit line, in example, when three-phase voltage and current from the faulted line circuit, and additionally zero-sequence current from the healthy line circuit, are provided as the relay input signals. The algorithm is based on changing the position of the distance relay characteristic in such away that the reactance effect is effectively compensated for. For this purpose the shift vector is determined in on-line relatively simple calculations."

"Dalam rangka meningkatkan pendapatan, PT.PLN (Persero) melaksanakan perjanjian jual beli tenaga listrik dengan PT. Lotte Chemical Indonesia Cilegon. berupa investasi relokasi saluran udara tegangan tinggi 150 kV. Penelitian ini begitu penting sebagai simulasi skala kecil mengingat banyaknya proyek transmisi tenaga listrik yang dilaksanakan PLN. Penelitian ini menganalisis dampak relokasi SUTT 150 kV tersebut ditemukan bahwa material eksisting yang dibongkar baik yang termanfaatkan/ tidak termanfaatkan kembali sehingga berpotensi menjadi penambah/pengurang investasi bagi PLN. Metode penelitian berupa analisis data kajian kelayakan proyek PLN. Analisis perhitungan dengan menghitung nilai asset eksiting yang kemudian digunakan sebagai acuan dalam perhitungan analisis sensitivitas yang kemudian ditentukan 3 skenario dengan menggunakan indikator finansial IRR, NPV, B/C Ratio dan Payback Period (PB). Hasil penelitian menunjukkan bahwa untuk Skenario 1,2 dan 3 mempunyai nilai IRR dan B/C Ratio positif dan terdapat selisih 1 tahun untuk payback period antara skenario 1 dan 3 vs skenario 2 dan untuk NPV tertinggi ada di skenario 3.

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In order to increase revenue, PT PLN (Persero) entered into a power purchase agreement with PT. Lotte Chemical Indonesia Cilegon. investment in the relocation of 150 kV high voltage overhead lines. This research is very important as a small-scale simulation given the large number of electric power transmission projects implemented by PLN. This study analyzes the impact of the relocation of the 150 kV SUTT and found that the existing material that was dismantled was either utilized/not reused so that it has the potential to increase/decrease investment for PLN. The research method is in the form of data analysis on the feasibility study of the PLN project. Calculation analysis by calculating the value of existing assets which is then used as a reference in calculating sensitivity analysis which is then determined 3 skenarios using financial indicators IRR, NPV, B/C Ratio and Payback Period (PB). The results of the study show that skenarios 1, 2 and 3 have positive IRR and B/C ratio values and there is a difference of 1 year for the payback period between skenarios 1 and 3 vs skenario 2 and the highest NPV is in skenario 3."