Abstract
In this paper, a Medium Voltage DC (MVDC) Collection grid using SiC devices for two large Photo Voltaic (PV) power plants is proposed. The proposed system consists of a power sharing converter, boost converter, voltage multiplier and grid-tie inverter. The power sharing stage achieves Maximum Power Point Tracking (MPPT) under variable weather conditions. The voltage regulation boost converter stage regulates the boost converter output voltage at 3.2 kV. The voltage multiplier stage multiples the output voltage of the boost converter five times resulting a fixed MVDC output of 16 kV. The devices and diodes used in the proposed system are Silicon Carbide (SiC) to achieve compact volume/weight and high efficiency. Simulation results of the proposed MVDC system are discussed.