What are the main connection modes of 6~ 1 10kv?

The power grid generally adopts the connection mode with or without backup. According to the size and distribution of load and the different requirements for power supply reliability, the mixed connection mode of several modes is selected, and it is arranged as "strong/weak/strong" connection mode according to the voltage level of 220/60 (110)/10kV. The connection mode of high-voltage distribution network requires high reliability, so there are generally spare connections, which mainly include: two power supply sections of high-voltage distribution network, double T connection of cable lines and three T connections of three power supplies. The connection modes of medium voltage distribution network mainly include radial, ordinary ring, handle ring, double-wire radial, double-wire handle ring and so on.