Collaborative planning method considering distributed renewable energy sources and flexible soft switches in gas-electricity coupling active distribution network system

The invention relates to a planning method for a renewable energy distributed power generation system (RDG) and a flexible soft switch (SOP) in an active distribution network system considering gas-electricity interconnection, and the method additionally considers coupling with a natural gas distribution network and SOP facility planning in a conventional active distribution network planning model containing the RDG. The method is more suitable for the technical development of the power distribution network under the background of a novel power system, and can convert a double-layer nonlinear programming problem into a series of mixed integer second-order cone problems which are easy to solve through iterative solution. By adopting the model to plan the active distribution network system considering gas-electricity interconnection, the technical and economic level of operation of the active distribution network system considering gas-electricity interconnection can be improved on the technical premise of ensu