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Discuss how voltage regulation / power delivery is achieved in high voltage AC power networks.

Q1.

Essay: Discuss how voltage regulation / power delivery is achieved in high voltage AC power networks. Include a comparison between different types of method to include advantages / disadvantages of FACTS devices versus more traditional approaches.

Essay Structure

Title: Power Control in HVAC

Abstract

Part 1 Traditional methods of control of voltage / power delivery in networks

Part 2 FACTS

Part 3 Examples of FACTS in operation new plants or HVAC schemes involving FACTS

Concluding statement

References

(50 Marks)

Q2

Figure 1 shows the one-line diagram of a simple three-bus power system with generation at bus 1. The voltage at bus 1 is V1 = 1.0∠0° per unit.

a)

i. Compute the per unit voltages at buses 2 and 3 again using the Gauss-Seidel method (assume for the purpose of this computation that SB = 100 MVA + your birthday (i.e. birth day 20 of the month

SB = 100 +20 = 120 MVA))

My birthday is 19

(40 marks)

ii. Verify the results of your computation via the use of a proprietary Gauss Seidel programme (you must cite source of your program).

iii. (10 marks)

Figure 1

Impedance Load

Z12 = 0.5 Ω Bus 2 = 300 MW + 200 Mvar

Z13 = 0.125 Ω Bus 3 = 350 MW + 250 Mvar

Z23 = 0.75 Ω

Table 1

(50 Marks)


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