高压配电网的接线应规范化、标准化，力求简化，运行时一般采用辐射型结构。

The wiring of the high-voltage distribution network should be standardized and standardized, and strive to simplify, and generally adopt a radial structure during operation. In order to balance the normal power supply load between the two power supply systems, and have the load transfer capability between the two power supply systems in the event of a failure, the 110kV substation should adopt double-sided power supply lines. In areas with dual power supply conditions, a single 220kV substation can be used for power supply [10]. In a 10kV power supply area with a double-sided power supply line and a single main transformer with a small scale of 50MVA, the 110kV grid connection of methods A, B, and C can be used for transition according to the existing grid structure. In the case of three main transformers, it can be According to the grid layout, the 110kV grid connection of method D (four wires and six transformers) and method E (including tie lines, four wires and six transformers) is adopted.

The wiring of the high-voltage distribution network should be standardized and standardized, and the operation time should be simplified. In order to facilitate the balance of normal power supply load between the two power systems, and with the load transfer capacity between the two power systems in the event of failure, 110kV substation should use a two-sided power feed line, for areas with small load density, scattered distribution or do not have dual power supply conditions, a single 220kV substation can be used to connect power supply. In the 10kV power supply area with two-sided power feed and a single main variable scale of 50MVA, the 110kV power grid wiring of A, B and C can be used according to the existing grid structure A, B, C, and the 110kV power grid wiring can be used according to the grid distribution point D (four lines six changes) and E (including the four lines of the contact line six changes).

The wiring of high voltage distribution network should be standardized and simplified, and the radiation type structure is generally adopted during operation. In order to balance the normal power supply load between the two power supply systems and have the capacity of load transfer between the two power supply systems in case of fault, the 110kV substation should adopt the double side power supply incoming line. For the areas with small load density, scattered distribution or no dual power supply conditions, the single 220kV substation can be used for power supply [10]. In the 10kV power supply area with bilateral power supply incoming lines and small single main transformer scale of 50MVA, the 110kV power grid connection of mode a, B and C can be adopted for transition according to the existing power grid structure. In the case of three main transformers, the 110kV power grid connection of mode D (four lines and six transformers) and mode e (including four lines and six transformers of tie line) can be adopted according to the power grid layout.<br>