A’rois, Sajed (2024) Implementasi Buck Converter Untuk Pengisian Daya Baterai Valve Regulated Lead Acid (VRLA) Pada Sistem Pembangkit Listrik Tenaga Surya (PLTS) Menggunakan Metode Constant Current Constant Voltage. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baterai adalah perangkat yang dapat menyimpan energi listrik. Setelah digunakan sebagai sumber energi, baterai akan berkurang kapasitas energinya, supaya dapat kembali ke kapasitas maksimumnya kembali maka baterai tersebut perlu di charge. Pada Proyek Akhir ini, dilakukan perancangan dan pembuatan buck converter untuk charging baterai. Baterai yang digunakan adalah baterai Valve Regulated Lead Acid (VRLA) dan menggunakan kontrol Proportional Integral (PI) agar tegangan dan arus pengisian baterai yang dihasilkan buck converter lebih stabil. Proses pengisian baterai menggunakan metode Constant Current Constant Voltage (CC-CV) dengan kontrol PI yang bertujuan untuk memperpanjang umur (lifetime) baterai. Pada sistem yang dibangun, sumber berasal dari panel surya 120 Wp untuk pengisian baterai VRLA. Proses pengisian baterai menunjukkan bahwa arus meningkat secara cepat dan stabil pada setpoint 1,5A dalam waktu 20 menit, arus tetap konstan hingga mendekati waktu 40 menit, dan arus mulai menurun setelah waktu 40 menit berlanjut sampai 50 menit. Selain itu, tegangan meningkat dan stabil hingga mencapai setpoint 13,8V dalam waktu 20 menit, dan tegangan tetap konstan hingga waktu 50 menit. Dalam pengoperasian, duty cycle diatur dari 10% hingga 90% dan memiliki error rata-rata 0,02%. Hasil pengujian menunjukkan bahwa buck converter mampu menjaga tegangan output stabil pada 13,8V dan arus pengisian konstan 1,5A, sesuai spesifikasi baterai VRLA. Sistem kontrol PI berhasil mengurangi fluktuasi tegangan dan arus dengan nilai Kp 1,5 dan Ki10, sehingga mengurangi resiko overcharge dan overdischarge. Implementasi metode CC-CV dengan kontrol PI efektif dalam memperpanjang umur baterai dengan menjaga parameter pengisian dalam batas yang ideal.
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A battery is a device that can store electrical energy. After being used as an energy source, the battery will decrease its energy capacity, so that it can return to its maximum capacity again, the battery needs to be charged. In this Final Project, the design and manufacture of buck converter for battery charging is carried out. The battery used is a Valve Regulated Lead Acid (VRLA) battery and uses Proportional Integral (PI) control so that the voltage and battery charging current produced by the buck converter are more stable. The battery charging process uses the Constant Current Constant Voltage (CC-CV) method with PI control which aims to extend the life of the battery. In the system built, the source comes from 120 Wp solar panels for charging VRLA batteries. The battery charging process shows that the current increases rapidly and stabilizes at a setpoint of 1.5A within 20 minutes, the current remains constant until close to 40 minutes, and the current begins to decrease after 40 minutes continuing until 50 minutes. In addition, the voltage increased and stabilized until it reached the setpoint of 13.8V within 20 minutes, and the voltage remained constant until the time of 50 minutes. In operation, the duty cycle is set from 10% to 90% and has an average error of 0.02%. The test results show that the buck converter is able to maintain a stable output voltage at 13.8V and a constant charging current of 1.5A, as per the specifications of the VRLA battery. The PI control system successfully reduces voltage and current fluctuations with Kp values of 1.5 and Ki10, thus reducing the risk of overcharge and overdischarge. The implementation of the CC-CV method with PI control is effective in extending battery life by keeping the charging parameters within ideal limits.
| Item Type: | Thesis (Diploma) |
|---|---|
| Uncontrolled Keywords: | Buck Converter, Baterai Valve Regulated Lead Acid (VRLA), Kontrol Proportional Integral (PI), Constant Current-Constant Voltage (CC-CV).Buck Converter, VRLA Battery, Proportional Integral (PI), Constant Current-Constant Voltage (CC-CV), Buck Converter, VRLA Battery, Proportional Integral (PI) |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1087 Photovoltaic power generation T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2945 Lead-acid batteries. |
| Divisions: | Faculty of Vocational > 36304-Automation Electronic Engineering |
| Depositing User: | Sajed A'rois |
| Date Deposited: | 23 Aug 2024 08:04 |
| Last Modified: | 23 Aug 2024 08:04 |
| URI: | http://repository.its.ac.id/id/eprint/115500 |
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