Frequency support strategy for single-Stage grid-Connected photovoltaic generation with active power reserves

Large-scale photovoltaic (PV) generation grid connection causes lack of inertia and insufficient frequency regulation capacity power system. To solve this problem, study proposed the active power-frequency droop control (APFDC) virtual (VIC) for single-stage PV generation. is able to participate in by improving system voltage source converter (VSC). The effect parameters on characteristic analyzed. On basis, distribution mechanism unbalanced among generators with strategy revealed. simulation results indicated that can be controlled setting (VSC) reduce or increase power; it also takes part provided controllable frequency-dependent, increases gain, decrease time constant VIC, phase-locked loop (PLL) bandwidth.