Electronic Theses and Dissertation

Pembangkit Listrik Tenaga Surya (PLTS) merupakan solusi energi terbarukan yang krusial, dengan inverter sebagai komponen utama penonversi direct current (DC) menjadi alternating current (AC). Namun, proses switching pada inverter menghasilkan distorsi harmonik yang dapat menurunkan kualitas daya listrik, yang diukur melalui nilai Total Harmonic Distortion (THD). Penelitian ini bertujuan untuk merancang filter pasif yang optimal guna mereduksi distorsi harmonik pada keluaran inverter agar sesuai dengan standar kualitas daya. Metodologi penelitian diawali dengan pengujian filter single-tuned, namun hasil simulasi menunjukkan metode ini belum mampu menekan nilai THD di bawah ambang batas yang diinginkan. Sebagai pengembangan, dirancang filter pasif low-pass yang berhasil menurunkan nilai THD secara signifikan hingga menjadi 10.3%. meskipun belum sepenuhnya mencapai standar IEEE 519-2014 sebesar 5%, hasil ini menunjukkan peningkatan performa yang jauh lebih efisien dibandingkan penggunaan filter single-tuned. Dengan demikian, desain filter low-pass terbukti lebih efektif dalam meningkatkan kualitas daya pada inverter.

Kata kunci: PLTS, inverter, harmonik, THD, filter pasif, filter low-pass.

Solar Power Plants (PLTS) are a crucial renewable energy solution, with the inverter serving as the main component for converting direct current (DC) to alternating current (AC). However, the switching process in the inverter produces harmonic distortion that can degrade power quality, as measured by the Total Harmonic Distortion (THD) value. This study aims to design an optimal passive filter to reduce harmonic distortion in the inverter output to meet power quality standards. The research methodology began with testing a single-tuned filter; however, simulation results showed that this method was unable to suppress the THD value below the desired threshold. As a development, a low-pass passive filter was designed, which successfully reduced the THD value significantly to 10.3%. Although it has not fully met the IEEE 519-2014 standard of 5%, these results demonstrate a much more efficient performance improvement compared to the single-tuned filter. Thus, the low-pass filter design is proven to be more effective in enhancing the power quality of the inverter. Keywords: Solar Power Plant, inverter, harmonics, THD, passive filter, low-pass filter.