A Synchronized Grid Integrated Three-Phase Inverter with a Renewable Source for Power Sharing

• 作者: Johnson A. Asumadu Zuhair Alqarni
• 来源期刊: 电力能源(英文)
• 学科: 工学
• 关键词: PLL (Phase Locked Loop) LC (Inductor Capacitor) Filter PWM (Pulse WIDTH Modulation) THD (Total Harmonic Distortion) MATLAB (Matrix Laboratory)
• 年，卷（期）: 2020,（3）
• 页码范围: 88-101
• 页数: 14页
• 分类号: TM4

摘要

In this paper, a three-phase inverter with renewable source input is integrated into a grid in synchronization for power sharing by load. In previous topologies, the DC source connected inverter is not synchronized to the grid which causes harmonics and voltage distortions damaging the load and the source. In order to ensure power sharing by the load from the inverter and the grid, the inverter needs to be operated in synchronization to the grid with the same voltage mag-nitude, frequency and phase as that of the grid voltage. In this paper, the com-plete power from the load is shared by the three-phase grid and the three-phase inverter module reducing the consumption from the conventional grid. This is achieved using the PLL for the reference angular frequency generation with feedback from grid voltage and is connected to the sinusoidal PWM generator. The PLL is used to generate unit vector template reference signals for the signal generator operating the six-switch inverter. The inverter and grid are inter-connected through LC filter for the reduction of harmonics. The power sharing, voltage, and current graphs with THD analysis are analyzed with the help of the MATLAB software.