Abstract
Inverter has been used for a wide variety of applications in renewable energy system. The use of inverter in a solar power plant system can off-grid and on-grid. H-Bridge inverter is one of the commonly used inverter. One of its disadvantages is the requirement of high frequency in order to get a low defect level on the output current. The use of a five-level inverter with considering the amount of a power semiconductor switch in can be as an alternative. This study aims to use a five-level inverter with five power semiconductor switches to deliver power to the grid.The working principle uses two sinusoidal signals that are shifted by 1800 compared to two carrier signals to produce a sinusoidal pulse width modulation signal. A sinusoidal pulse width modulation signal is used as a controller on each power semiconductor switch. The transmitted power is in the form of a current that is injected into the single-phase grid. The transmission of a power using five-level inverter to a single-phase grid was validated by a Power Simulator software. The final stage was a hardware implementation in the laboratory. The result shows that the inverter could transmit a power as current with 4.01% THDi, transmitted power as 36.4 Watts, and transmitted current as 0.52 Amps.
Highlights
Abstrak— Inverter telah digunakan untuk berbagai macam aplikasi dalam sistem energi baru terbarukan
This study aims to use a five-l evel inverter with five power semic onduc tor switc hes to del iver power to the grid
“A single-phase cascaded H-Bridge inverter for grid-tie photovoltaic system addressing the problem of unbalances in H-Bridge cells,” in Int. Conf
Summary
Sumber energi listrik saat ini banyak digunakan. Dengan bertambah banyaknya pengguna, maka dibutuhkan energi alternatif lain yang disebut dengan energi baru terbarukan (EBT) atau renewable energy [1]. Pada sistem on-grid, energi yang dihasilkan oleh PLTS terhubung dengan jaringan listrik PLN dan juga digunakan untuk mensuplai beban peralatan listrik [3]. Kelemahan dari inverter jenis ini harus menggunakan frekuensi t inggi agar mendapatkan tingkat kecacatan yang rendah pada sisi keluaran arus [7]. Inverter bertingkat memiliki keuntungan seperti produksi daya yang lebih tinggi, kualitas bentuk gelo mbang keluaran , dan kemampuan tegangan tinggi. Tetapi juga memiliki kerugian seperti ju mlah sakelar daya yang lebih banyak dan metode kontrol modulasi lebar pulsa sinusoidal dapat mempengaruhi distorsi harmonik [9]. Tujuan dari penelitian ini adalah mengirimkan daya ke grid satu fasa menggunakan inverter lima tingkat. Inverter lima tingkat diharapkan menghasilkan THDi sesuai standart IEEE 519 menggunakan frekuensi yang rendah dan tapis induktor yang kecil dibandingkan dengan inverter konvensional [7].
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