Equivalent Input Disturbance-Based Control Design for Three Phase Dual-Stage Grid-Tied Photovoltaic System Considering Dead Time Effect

Grid-tied inverter is the prominent component of the three-phase dual-stage photovoltaic (PV) grid-tied power generation system. However, the disturbances caused by dead time effect will pose the reduction of grid-tied current quality and even cause the imbalance of inverter itself or other circuit devices. In this paper, a current control strategy is proposed to damp dead time effect for the three-phase dual-stage PV grid-tied inverter system, and its design, stability analysis, and implementation are carried out. First, the inverter model is modified by regarding the dq reference frame coupling terms, uncertainties, and external and internal disturbances as an unknown lumped disturbance. Then, a current control scheme based on compensation of equivalent input disturbance is introduced, and it estimates and compensates the unknown lumped disturbance, which effectively realizes the inverter model decoupling and comprehensive disturbance rejection. Last, simulation results demonstrate the effectiveness and superiority of the proposed current controller.

Performance Analysis of Diode Clamped Five-Level Inverter integrated PV Grid system using Soft computing based MPPT Scheme

This paper focuses on diode clamped five-level inverter for the application of PV system. Carrier based phase disposition method is adopted for control of inverter switches. The five-level diode clamped integrated to grid connected PV system is considered for the performance evaluation. The PI controller is adopted for the regulation of DC voltage. The Fuzzy Logic Control (FLC) based MPPT scheme is used to track the maximum power from the PV panel. The performance indices including PV current, DC link voltage and %THD of diode clamped inverter based grid connected PV system is compared with conventional two-level Inverter. The proposed work is carried out in the environment of Matlab/Simulink. Keywords: Diode clamped five-level inverter, FLC MPPT, Two-level voltage source inverter, PWM, THD, PV, Grid.

Application of PI controller based active filter for harmonic mitigation of grid-connected PV-system

The recent trends show the interconnection of PV system with electric grid. With this configuration the issue of harmonics comes into existence. The mounting figure of power-electronic instruments has formed considerable impression on the power-quality of electric supply. Harmonics deformations have conventionally been handled amid the application of passive-LC filters. Active Filter has emerged as a good substitute for passive filters to reduce the harmonics to great extent as it has numerous benefits over the former filters. The active filter’s most vital part is the applied control strategies. Several researches are being under process to advance the functioning of the filter. One of the important control requirements of filter is the regulation of DC link up capacitor voltage. Here the voltage supervision of capacitor is being done using PI controller. The paper show current harmonics compensation of PV grid connected system using PI controller based active filter. Simulation outcomes have been shown which displays the harmonics are within the IEEE boundaries.

Tempat sampah otomatis berbasis Internet of Things dengan penyulangan hybrid PV-grid

Tempat sampah otomatis adalah sebuah alat yang mempermudah seseorang dalam membuang sampah. Tutup tempat sampah yang dapat membuka dan menutup secara otomatis memiliki tujuan agar menghindari terinfeksinya bakteri pada tutup. Penumpukan sampah dapat menyebabkan bau tidak sedap hingga polusi udara. Tempat sampah otomatis di luar ruangan sangat sulit terakses listrik sehingga diperlukan penyuplai listrik portable. Penelitian ini bertujuan untuk pembuatan tempat sampah otomatis berbasis Internet of Things (IoT) menggunakan sistem hybrid PV-grid. Sistem ini menambahkan fungsi dari tempat sampah otomatis yaitu untuk memberikan notifikasi terhadap petugas kebersihan jika tempat sampah telah penuh. Sistem suplai listrik menggunakan hybrid dua penyulangan yaitu photovoltaic (PV) dan listrik konvensional (grid). Perancangan sistem kontrol tempat sampah otomatis menggunakan sensor ultrasonik, modul mikrokontroler Arduino Uno, dan modul GSM. Hasil pengujian menunjukkan pengisian baterai hingga penuh membutuhkan waktu 3,39 jam dan mengirimkan notifikasi jika sensor ultrasonik mendeteksi sampah dengan jarak 20 cm selama 5 detik. Sistem pemberitahuan notifikasi juga berhasil dikirimkan menggunakan media SMS.

Tempat sampah otomatis berbasis Internet of Things dengan penyulangan hybrid PV-grid

Tempat sampah otomatis adalah sebuah alat yang mempermudah seseorang dalam membuang sampah. Tutup tempat sampah yang dapat membuka dan menutup secara otomatis memiliki tujuan agar menghindari terinfeksinya bakteri pada tutup. Penumpukan sampah dapat menyebabkan bau tidak sedap hingga polusi udara. Tempat sampah otomatis di luar ruangan sangat sulit terakses listrik sehingga diperlukan penyuplai listrik portable. Penelitian ini bertujuan untuk pembuatan tempat sampah otomatis berbasis Internet of Things (IoT) menggunakan sistem hybrid PV-grid. Sistem ini menambahkan fungsi dari tempat sampah otomatis yaitu untuk memberikan notifikasi terhadap petugas kebersihan jika tempat sampah telah penuh. Sistem suplai listrik menggunakan hybrid dua penyulangan yaitu photovoltaic (PV) dan listrik konvensional (grid). Perancangan sistem kontrol tempat sampah otomatis menggunakan sensor ultrasonik, modul mikrokontroler Arduino Uno, dan modul GSM. Hasil pengujian menunjukkan pengisian baterai hingga penuh membutuhkan waktu 3,39 jam dan mengirimkan notifikasi jika sensor ultrasonik mendeteksi sampah dengan jarak 20 cm selama 5 detik. Sistem pemberitahuan notifikasi juga berhasil dikirimkan menggunakan media SMS.