1 10KV and 220KV cannot be directly used, and these high voltages are used for power transmission in the power grid. Therefore, 1 10KV and 220KV substations are adopted to boost the power to a distant power consumption area through lines, or reduce the power sent to a voltage that can be directly used. The main functions of these substations are power transformation and transmission. And 10KV is the local power supply voltage, and 10KV switching station sends 10KV to all users through various lines through the bus. The main function of these switchboards is to distribute electricity to users.