With the increasing permeability of distributed generation and the increasing multi-disturbance coupling effect

the stability analysis and optimal operation of new-type distribution network are faced with great challenges. In this paper

a multi-disturbance coupled equivalent circuit is established based on the node voltage equation of the new-type distribution network. Based on the power flow solvability of the multi-disturbance coupled equivalent circuit

a coupling voltage stability constraint (CVSC) is proposed to realize the quantization constraint of voltage stability under the coupling influence of multiple disturbances. At the same time

the coupling voltage stability joint chance constraint (CVS-JCC) is proposed by combining CVSC and joint chance constraint through Bonferroni inequality. Further

the analytical expression of CVS-JCC is obtained by the deterministic transformation of CVS-JCC

and the optimal operation method of distribution network considering CVS-JCC is proposed to improve the safe

stable

and economical operation of the distribution network. Finally

through the simulation experiment of a distribution network model in Taizhou

Zhejiang Province

the effectiveness of CVS-JCC and the advances in the operational optimization method under different scenarios are proved.