Fikri, Ahmad (2026) Desain dan Implementasi Modified Quadratic High-Gain DC-DC Converter untuk Aplikasi Photovoltaic. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pemanfaatan energi surya melalui teknologi fotovoltaik (PV) dihadapkan pada tantangan teknis berupa tegangan keluaran searah (DC) yang rendah, sedangkan integrasi sistem menuntut tegangan bus DC yang tinggi dan stabil. Untuk menjembatani kesenjangan tersebut, penelitian ini mengusulkan desain dan implementasi Modified Quadratic High-Gain DC-DC Converter (MQHGC) sebagai antarmuka daya. Topologi ini dirancang untuk memberikan rasio penguatan tegangan secara ekstrem sekaligus mampu mereduksi tekanan tegangan (voltage stress) pada komponen saklar tunggalnya. Penelitian ini bertujuan untuk merancang konverter dengan kemampuan menaikkan tegangan masukan 30 V menjadi keluaran 420 V untuk kebutuhan kapasitas daya 100 W beroperasi pada frekuensi switching 50 kHz. Evaluasi performa sistem dilakukan melalui komputasi perangkat lunak PSIM dalam kondisi open-loop maupun closed-loop berbasis kendali Proportional-Integral (PI), yang kemudian divalidasi secara langsung melalui pengujian hardware menggunakan mikrokontroler ESP32. Hasil penelitian menunjukkan bahwa konverter berhasil beroperasi dan mempertahankan aliran arus pada Continuous Conduction Mode (CCM). Pada pengujian rasio konversi duty cycle tinggi (0,7), ditemukan adanya deviasi di mana implementasi perangkat keras menghasilkan tegangan 430 V dibandingkan simulasi yang mencapai 564 V. Penurunan ini disebabkan oleh pengaruh elemen induktansi parasitik dan rugi-rugi pensaklaran (switching loss). Secara keseluruhan, purwarupa konverter ini mampu beroperasi secara stabil dengan pencapaian efisiensi maksimum sebesar 82,94% pada kondisi pembebanan menengah.==============================================================================================================================
The utilization of solar energy through photovoltaic (PV) technology faces the technical challenge of low direct current (DC) output voltages, whereas system integration requires a high and stable DC bus voltage. To bridge this gap, this study proposes the design and implementation of a Modified Quadratic High-Gain DC-DC Converter (MQHGC) as the power interface. This topology is designed to provide an extreme voltage gain ratio while simultaneously reducing the voltage stress on its single switch component. This study aims to design a converter capable of stepping up an input voltage of 30 V to a 420 V output to meet a 100 W power requirement, operating at a switching frequency of 50 kHz. The system's performance was evaluated using PSIM software simulations under both open-loop and closed-loop conditions based on Proportional-Integral (PI) control. These simulations were then directly validated through physical prototype testing using an ESP32 microcontroller. The results indicate that the converter successfully operates and maintains the current flow in Continuous Conduction Mode (CCM). During the high duty cycle (0.7) conversion ratio test, a deviation was observed where the hardware implementation produced a voltage of 430 V compared to the simulation which reached 564 V. This voltage drop is attributed to the influence of parasitic inductance elements and switching losses. Overall, the converter prototype was able to operate stably, achieving a maximum efficiency of 82.94% under medium load conditions.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | CCM, Fotovoltaik, Kendali PI, Mikrokontroler ESP32, Modified Quadratic High-Gain DC-DC Converter |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK531 Current and voltage waveforms T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7872 Electric current converters, Electric inverters. |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Ahmad Fikri |
| Date Deposited: | 21 Jul 2026 04:04 |
| Last Modified: | 21 Jul 2026 04:04 |
| URI: | http://repository.its.ac.id/id/eprint/135980 |
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