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Fundamental Frequency Modulated Multipulse Voltage Source Converter for Solar PV Plant

In this paper, fundamental frequency switching (FFS) modulated multipulse voltage source converter (VSC) is used for high-power solar photovoltaic (PV) plant. The VSC is realized with the utilization of medium voltage (MV) transformer with open winding delta secondaries and different phase-shifted zigzag primary windings connected in series. The delta windings are fed by neutral point clamp (NPC) converters (three-level). The direct power control (DPC) strategy is utilized in multipulse VSC for control of active power and reactive power. MATLAB based simulation of the solar PV plant is done to verify its steady-state, harmonics, and dynamic responses. The VSC STATCOM operation during daytime and nighttime is also demonstrated in detail.