1 what is the power system and the power network? 2 what is the rated voltage of the electrical equipment? Why do the power system to use a variety of voltage levels? 3
The rated voltage of the electrical equipment is the working voltage standard designed by the designer.4, the power system uses a variety of voltage levels, on the one hand is the process of historical evolution, in 50s only 35KV, in 60s with 110KV, in 70s the establishment of the 220KV power grid, and later developed to 500KV and DC transmission. On the other hand, a higher voltage level is used to further the safety and economy of transmission. Of course, the retention of 35KV and 110KV, but also taking into account the economic costs of close range transmission.
The electric power network is referred to as the "power grid", which refers to the connection between the bus from the booster station of the power plant to the bus of the substation.
Power system is a kind of electric power production and consumption industry chain, which is from generation to generation. When the "power system" as an industry name, it includes power generation, for (transmission) electricity, power construction, power design, power test, power scheduling, etc..
