QUESTION $6$

a$)$ With reference to load flow analysis define the following terms

i$)$ Reference bus also called the swing or slack bus

ii$)$ Load bus

$(2$ marks$)$

iii$)$ Voltage controlled bus$/$generator bus

$(2$ marks$)$

$(2$ marks$)$

b$)$

i$)$ Determine the nodal matrix for the above system in terms of the admittances

$(4$ marks$)$

ii$)$ Determine the load flow equation for $I_1,I_2,I_3$ and $I_4$ and $I_5$ in terms of the admittances and voltages at buses $(10$ marks$)$