A generating station has the following daily load cycle: Time (Hours) Load (MW) 0-5 5-10 10-12 12-16 16-20 20-24 30 50 80 50 70 30 Draw the load curve and find: 1. Maximum demand 2. Units generated per day 3. Average load 4. Load factor.

Two parallel loads are connected to a 120 volt rms, 60 Hz power line. One load absorbs 10 k watts at 0.8 power factor lagging. The second load absorbs 4 k watts at 0.9 power factor leading. Determine the real (watts) and reactive (VARS) power of the combined load.

In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generator is connected in star with its star points grounded. The per unit impedances of each element on a 40 MVA base are given in Table 1 and the voltage levels are given in Table 2. Z [p.u.] 0 2 tööt Generator 0.01 +j0.08 p.u. L Figure 1: A section of the distribution system Transformer T1 Line V BASE [KV] 0.04 + j 0.03 + j 0.15000000000000002 0.06000000000000000 Generator Table 1: Sequence impedances (p.u. on 40 MVA base) 3 T2 181. Line 3 10 Table 2: Voltage bases (kV) Load 1 Transformer T2 Load Current A load current of 11.316 kA is flowing with a lagging power factor of 90 %. Convert this to a current vector in per-unit. IL = 0.04 + j 0.06000000000000000