I have two labs and one assignment needs to be done by 18/01/11. Expected grade 2:1 reference book Power system analysis and design GLOVER AND SharmaDocument Preview:School of Engineering Department of Systems Engineering BEng Electrical & Electronic Engineering Power Systems Engineering Laboratory 3: Fault Analysis 1. Power World Simulator case Problem 720 (Sarma et al 2007) models the system shown in Figure 7.12 with all data on a 100MVA base. Using PWS, determine the fault current for three phase faults at each of the buses. Provide a table of the bus voltages for each fault in a tabular form. (Refere to Example 7.5) 2. Repeat Problem 1 above, except place the fault midway between Buses 2 & 4. (Hint: right click on line, choose Fault  ) 3. One technique for limiting fault current is to place reactance in series with the generators or lines immediately after transformer buses. Such reactance can be modelled in PWS by increasing the value of the generators positive sequence internal impedance. For the Problem 720 case, how much per-unit reactance must be added to G1 to limit its maximum fault current to 1.5 per unit? Where is the location of the most severe bus fault? 4. Simulate case Example 9.8 (Sarma et al 2007) and check your results are similar to those reported in the book. The results in Table 9.5 show that during the single lineto-ground fault at bus 2 the b and c phase voltage magnitudes at bus 2 actually rise above the pre-fault voltage of 1.05 per unit. Use PWS with case Example 98 to determine the type of bus 2 fault that gives the highest per-unit voltage magnitude. 5. Using PWS case Example 9.8, plot the variation in the phase a, b and c voltage magnitudes during a single line-to-ground fault as the fault reactance is varied from 0 to 2.0 per unit in 0.1 per-unit steps. (The fault impedance is specified on the Fault Options page of the Fault Analysis page) 6. Redo Example 9.8, except: a. With a line-to-line fault at each of the buses b. With a bolted double line-to-ground fault at each of the buses c. With a line installed between buses 4 & 5. The parameters of the new line should be Attachments: lab3fault-a.pdf lab2load-flo.pdf lab3fault-a.pdf Assignment1-D.pdf