Electronic Theses and Dissertation

Transformator distribusi digunakan untuk mendistribusikan daya ke pelanggan, bila terjadi gangguan maka akan menghambat penyaluran daya. Gangguan dari Transformator distribusi biasanya karena tingginya harmonisa. Masalah yang terjadi pada transformator distribusi di PT. PLN (Persero) ULP Syiah Kuala adalah terbakarnya belitan primer atau sekunder dan putusnya kabel netral. Penelitian ini bertujuan untuk menganalisis dan memperbaiki (mitigasi) harmonisa pada transformator distribusi di PT. PLN (Persero) ULP Syiah Kuala. Penelitian ini dilakukan dengan cara membuat model analisis sistem distribusi dengan MATLAB/Simulink dan mendesain alat mitigasi untuk mereduksi harmonisa. Alat mitigasi ini akan diimplementasikan pada salah satu transformator distribusi di PT. PLN (Persero) ULP Syiah Kuala. Dari simulasi yang dilakukan pada penelitian ini hasil yang didapatkan adalah nilai harmonisa pada awalnya bernilai 15.68%, 13.25% dan 12.63% saat jam kantor, 16.67%, 13.18% dan 12.86% saat sore hari dan 18.21%, 12.01% dan 13.05% saat beban puncak menjadi 7.8%, 4.93% dan 4.78% saat jam kantor, 8.14%, 5.11% dan 4.8%. saat sore hari dan 9.66%, 4.68% dan 5.45% untuk beban puncak.
Kata kunci: Transformator, Harmonisa, THDv, THDi, Alat mitigasi, MATLAB

Distribution transformers are used to distribute power to customers, if there is a disturbance it will hinder the distribution of power. The disturbance of a distribution transformer is usually due to high harmonics. Problems that occur in the distribution transformer at PT. PLN (Persero) ULP Syiah Kuala, burning of the primary or secondary winding and breaking of the neutral cable. This study aims to analyze and improve (mitigate) harmonics in the transformer distribution at PT. PLN (Persero) ULP Syiah Kuala. This research was conducted by creating a distribution system analysis model with MATLAB/Simulink and designing a tool for reducing harmonics. This handling tool will be implemented in one of the distribution transformers at PT. PLN (Persero) ULP Syiah Kuala. From the simulations carried out in this study, the results obtained were the harmonic values which were initially worth 15.68%, 13.25% and 12.63% during office hours, 16.67%, 13.18% and 12.86% during the afternoon and 18.21%, 12.01% and 13.05% when the load peaks being 7.8%, 4.93% and 4.78% during office hours, 8.14%, 5.11% and 4.8%. during sick days and 9.66%, 4.68% and 5.45% for peak loads. Keywords: Transformer, Harmonics, THD, Mitigation tools, MATLAB