.110 Kv Substation Design And Planning

This paper designs a step-down substation,which has three voltage levels: 110kV,35kV and 6kV。The high side voltage is 110kV, it is the primary circuit。The secondary side includes 35kV and 6kV,in which the 35kV voltage leve has a link circuit and the 6kV voltage circuit supply power for four ELECTRIC ARC FURNACES。The main contents include: The designing of connection mode for three voltage levels。The design plan of all transformers for standards ,numbers and types。The designing of secondary circuit meet the requirement in unmanned transformer place,the comprehensive protection system mainly adopts the CSR series protective device of Hua Guang Electric Co。,Ltd。Hangzhou。This substation enable to realize "four remote" function。Improving the electrical Power Supply for ELECTRIC ARC FURNACE by the calculation of reactive power limits。This article introduces dynamic VAR compensation system,it improves the Power Quality and also realize Energy Saving。...