Gangguan elektromagnetik berupa conducted emission noise yang ditimbulkan oleh inverter pada sistem photovoltaic (PV) off-grid telah berhasil dikarakterisasi. Noise yang merambat pada jalur konduksi dihasilkan dari fenomena switching inverter untuk proses konversi daya dari listrik searah (DC) menjadi arus bolak balik (AC). Standar IEC 62920:2017 dan CISPR 25:2016 digunakan untuk mengukur noise yang dihasilkan oleh inverter di sisi DC. Pengukuran conducted emission noise pada inverter dilakukan dalam tiga kondisi, yakni kondisi tanpa beban, terhubung dengan beban lampu pijar 60 W, dan terhubung dengan beban lampu pijar beserta dimmer untuk variasi daya. Pengukuran dilakukan pada lima buah inverter dengan kapasitas daya dan jenis keluaran (output) yang berbeda-beda, yaitu 200 W, 300 W, dan 700 W untuk tegangan keluaran modified sine wave serta 500 W dan 1.000 W untuk tegangan keluaran pure sine wave. Hasil pengukuran menunjukkan bahwa pada kondisi inverter terhubung dengan beban lampu pijar beserta dimmer, inverter model pure sine wave 500 W dan 1.000 W memiliki peak noise level yang cukup rendah dan berpotensi lebih sedikit untuk menimbulkan gangguan elektromagnetik di sisi DC.
LED lighting market share shows an ever increasing trend. This is driven by some of the LED advantages, such as higher efficiency, wide range of colors, and longer lifetime. LED is a DC device, and to power it from AC supply, like in household or street lightings, a driver is required to convert AC to DC supply. In addition, LED driver is preferred to operate in constant current mode in order to avoid LED thermal runaway. Also the driver has to have high efficiency, low THD (total harmonic distortion), and comply with electromagnetic emission limits. In this paper, a prototype of primary-side-regulated AC-DC flyback LED driver has been implemented. It has a constant output current of 0.990A 0.012A across the output voltage 15.59V – 42.80V. Measurement results show that the achieved efficiency is up to 88.55%, current harmonics comply with IEC 61000-3-2, and conducted emission levels comply with CISPR 15.
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