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| Self Evaluation questions |
| ELECTRICAL Department, RESTRUCTURED POWR SYSTEM by A R ABHYANKAR, |
| IIT Delhi, New Delhi. |
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Module 4 |
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| 1.Write down various limits imposed by physical and electrical characteristics of electric power.
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| 2.Pro-rata methods of congestion management are market-based methods. True or False. |
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| 3.Why TTC is different from transmission capacity? |
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| 4.Define Power Transfer Distribution Factor (PTDF). |
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| 5. In a power system, as more and more transactions are imposed on the base case, the ATC |
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- a)keeps on decreasing
- b)keeps on increasing
- c)remains same
- d) may decrease or increase
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| 6. A certain network has 3 lines which are currently carrying 60 MW, 50 MW, and -80 MW respectively. (-ve sign indicates direction opposite to what we have initially assumed). The PTDF factors for a transaction between node m and n are 0.25, -0.3, 0.25, respectively. If maximum capacity of each line is 100 MW in either direction, what is the ATC between the nodes m and n. |
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| 7. The PTDF factors are calculated for a certain power network based on DC load flow model. Which of the following statements are true? |
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- a) PTDF factors change if base case changes
- b) PTDF factors do not change even if base case changes
- c) PTDF factors change when new transactions are imposed
- d) PTDF factors do not change even if new transactions are imposed
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| 8. The PTDF factors are calculated for a certain power network based on AC load flow model. Which of the following statements are true? |
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- a) PTDF factors change if base case changes
- b) PTDF factors do not change even if base case changes
- c) PTDF factors change when new transactions are imposed
- d) PTDF factors do not change even if new transactions are imposed
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| 9. Explain in brief what do you understand by following terms: TTC, ATC, TRM |
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| 10.Theoretically, what is the maximum numerical value the PTDF can take? |
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