With the large-scale integration of distributed photovoltaics into the distribution network,the traditional distribution network forms have undergone significant changes,causing serious impacts on the carrying capacity and power quality of the distribution network.To this end,a distributed photovoltaic optimization access method based on voltage stability coefficient matrix with reactive power regulation was proposed,and the power quality management of the distribution network was carried out in zones.The voltage stability coefficient of the distribution network system was calculated through the Jacobian matrix of the current flow,and then the strong stability nodes near distributed photovoltaics were integrated in the form of DC convergence for grid connection with reactive power voltage regulation.The proposed method was validated through simulation using MATLAB/Simulink on IEEE-33 nodes.The results indicate that it can effectively improve network voltage rise and harmonic problems.
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