Task: Fault calculation and interruption capacity
Consider the power system described in Figure below and Table below and do the following tasks:
Figure: A given power system with one generators and 5 transmission lines
Table:
Instructions:
Consider transient impedances are 80% of nominal impedances of generators in the given system. The base power is 100MWA.
Do the following tasks:
1) Point out and label the location of all circuit breakers and disconnects in the circuit.
2) Calculate the current ratings and interruption capacity of all switches.
3) Assume a single phase ground fault occurs in Bus 3.
4) List the required protection actions, referring to the name of circuit breakers and disconnects.
5) Calculate the fault current.
6) Assume a two phase fault-ground occurs in Bus 2.
7) List the required protection actions, referring to the name of circuit breakers and disconnects
8) Calculate the fault current.