Distributed control requires only local communication and has good robustness and flexibility in the power control of the dispersed photovoltaic units. A distributed control strategy based on the discrete consensus algorithm

in which the upper layer strategy uses the consensus algorithm to optimize the output of photovoltaic to meet the total power demand and share the demand equally

while the lower layer strategy applies voltage-based control method whose reference point is obtained by quadratic interpolation. The convergence speed of proposed strategy will be slow when the number of photovoltaic curves becomes large. To improve the convergence speed

Chebyshev polynomials filtering is used in the consensus algorithm. The proposed polynomials filtering method is fully distributed and robust to the changing communication topology. A case study testifies to the effectiveness of the proposed distributed control strategy.