Electronic Theses and Dissertation

Daya yang dihasilkan oleh PV tidak konstan dan berubah-ubah tergantung pada kondisi lingkungan serta iradiasi matahari. Hal ini mengakibatkan perlunya sistem penyimpanan energi seperti baterai, agar daya yang disuplai ke beban selalu konstan dan sebagai sumber energi saat malam hari. Agar baterai dapat digunakan semaksimal mungkin, maka kesehatan baterai perlu diperhatikan. Salah satu aspek yang sangat mempengaruhi lifetime baterai adalah charge discharge dan suhu. Baterai harus di isi dan dikosongkan sesuai kapasitasnya dan beroperasi pada rentang suhu tertentu agar baterai tidak cepat rusak. Untuk itu diperlukan suatu kontrol yang dapat menjaga baterai dari overcharge, overdischarge dan overheat. Penelitian ini melakukan sistem proteksi pada pengisian dan pengosongan baterai pada sistem PV dengan mempertimbangkan temperatur kerja. Simulasi dilakukan pada MATLAB/Simulink dimana sistem terdiri dari panel PV, buck converter dengan tipe MPPT Perturb & Observe (P&O), dan baterai 12V 10Ah. Hasil dari penelitian ini yaitu kontrol dapat menghentikan charging ke baterai saat SOC baterai 80%, menghentikan discharging ke beban saat SOC 20%, serta menghentikan charging saat suhu mencapai 45ºC. Sistem berhasil memproteksi baterai dari kondisi kerja yang berbahaya.
Kata Kunci: Baterai, Buck konverter, MPPT, Sistem PV

The power produced by PV is not constant and changes depending on environmental conditions and solar irradiation. This results in the need for an energy storage system such as a battery, so that the power supplied to the load is always constant and as an energy source at night. So that the battery can be used as optimally as possible, it is necessary to pay attention to the health of the battery. One aspect that greatly influences battery life is discharge and temperature. The battery must be charged and discharged according to its capacity and operated within a certain temperature range so that the battery does not quickly become damaged. For this reason, a control is needed that can protect the battery from overcharging, overdischarging and overheating. This research provides a protection system for charging and discharging batteries in PV systems by considering working temperature. The simulation was carried out in MATLAB/Simulink where the system consists of a PV panel, a buck converter with MPPT Perturb & Observe (P&O) type, and a 12V 10Ah battery. The results of this research are that the control can stop charging the battery when the battery SOC is 80%, stop charging it when the SOC is 20%, and stop charging when the temperature reaches 45ºC. The system successfully protects the battery from hazardous working conditions. Keywords: Battery charging, buck converter, MPPT, PV system