The grounding mode of distribution network is an important factor affecting the safety and reliability of power supply. With a large number of distributed power sources connected to the grid

more attention of the grounding mode of highly permeable active distribution network shall be paid in the construction of intelligent distribution grid. The different grounding mode for the distribution power supply connected to the distribution grid is studied. Under such multiple modes as directing grounding of neutral point of distribution grid

non-grounding and grounding through impedance

the influence of different operation and grounding mode of the distribution power supply on the distribution grid is analyzed. Each grounding coordination scheme of the distribution and distribution power supply is analyzed from the comparison of zero sequence current and short circuit current variation of the fault point at the distribution side and distribution power supply side

the grounding configuration principle is explained. Finally

the grounding coordination scheme in different cases is verified based on the simulation platform.