As a distributed power source

photovoltaics are widely used in digital active distribution networks.The existing photovoltaics mainly work in the maximum power point tracking mode.In the case of excess power

it may cause voltage fluctuations at the grid connection point.In severe cases

the bus voltage may deviate from the standard

which hinders the application of photovoltaics in digital active distribution networks.Hence

realizing the active support function of photovoltaics and improving the schedulability of photovoltaic inverters has become the application trend of distributed power in the digital active distribution network.Therefore

this paper proposes a method of voltage self-adaptive regulation of photovoltaic inverters

which can realize the active support of photovoltaic inverter to voltage in grid-connected mode through the joint regulation of active and reactive power.Finally

a simulation model of the photovoltaic inverter was established on the MATLAB/SIMULINK platform to verify the effectiveness of the scheme.