This single line diagram shows the existing 132kV transmission network from Power Station C to
Substation SS with supply of 60A, to Substation ST with supply of 120A, and to Substation KT
with supply of 200A. Length of OverHead Line (OHL) between Power Station C and Substation
SS is 40km, between Substation SS and ST is 10km, and between ST and KT is 20km. OHL
resistance is 0.01 ohm per kilo-metre.

1)What if we link up Power Station C and substation KT with same OHL and 30km in length?

2)What are the advantages and disadvantages of Ring Connected Power Grid? (Hints : Contrast the efficiency before and after link up C-KT)

Transcribed Image Text:

Substation SS Load = 60A 10km Substation ST 40km Load = 120A 20km G Power Station C 30km 132kV Substation KT Load = 200A Substation SS Load = 60A 10km Substation ST 40km Load = 120A 20km G Power Station C 30km 132kV Substation KT Load = 200A