$7\mathrm{.}11$ Problems

Let the system shown in Fig. $7\mathrm{.}10$ have the reliability parameters shown in Table $7\mathrm{.}7$

and the load point details shown in Table $7\mathrm{.}9.$ Asswne that an isolator can be operated

in $0\mathrm{.}5$ hour. The points t$-$z are places at which the installation of additional components

is being considered as shown in the case studies given in Table $7\mathrm{.}17.$ For each case,

evaluate the failure rate, outage time and unavailability of each load point and the values

of SAIFI, SAlDI, CAIDI, ASAI and AENS.

$2$ The system shown in Fig. $7\mathrm{.}10$ is reinforced by connecting it through a norrnally open

point to another feeder as shown in Fig. $7\mathrm{.}11.$ Re$-$evaluate the indices specified in

Problem $1$ for all four case studies if:

$($a$)$ there are no transfer restrictions;

$($b$)$ the probability ofbeing able to transfer load is $0\mathrm{.}7.$

Distribution systems$-$basic techniques and radial networks $247$

Fig. $7.$II

Table $7\mathrm{.}17$