NPTEL Smart Grid Basics to Advanced Technologies Week 11 Assignment Answers 2024
1. Statement-A) A bi-directional DC-DC converter can connect PV panels to a conventional three-phase grid.
Statement-B) Ultracapacitors are connected to a DC microgrid using an AC/DC bidirectional converter.
- Statement A is true, and B is false.
- Statement B is true, and A is false.
- Both are true.
- Both are false
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2. Select the correct statement.
- The AC-DC distribution system is more complex than a pure AC distribution system.
- The AC-DC distribution system has fewer elements.
- Available load flow methods for transmission systems can also be applied to AC-DC distribution systems.
- All are correct.
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3. What are the main features of the power flow control strategy in energy management systems?
- Peak load reduction
- Effective control and management
- Increase the life span of the storage system.
- All of the above
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4. Renewable generation is in the top interest of the country due to?
- Increase in per capita energy consumption.
- Deficiency of Fossil fuels.
- Both
- None
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5. Identify the correct statements.
- In PHIL applications, the control signals are of high voltage level.
- In CHIL applications, the control signals are of low voltage level.
- In PHIL applications, the complexity of the circuit is less compared to that of the CHIL applications.
- None of the above statements is correct.
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6. The transmission losses in the Indian Power system as of August 2013 account for ____________ % of total power generation.
- ~2.4
- ~1.4
- ~4.1
- ~5.1
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7. What is/are the challenges of AC-DC load flow analysis?
- Requires proper modeling of various types of power converters in the load flow equations.
- Requires modeling of storage and various DC loads.
- Modeling of various types of distributed generations (PV Systems, Geothermal, Wind Generators, Hydropower, etc.) is difficult.
- All of the above
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8. What are the different types of buses in AC-DC systems?
- Slack bus, PQ bus, PV bus, DC PQ bus
- Reference bus, PQ bus, DC PV bus, DC P bus
- Reference bus, DC PV bus, PQ bus, DC V bus
- Reference bus, DC P bus, PV bus, PQ bus, DC V bus
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9. Statement – A) AC Load flow studies refer to the transient state analysis of the power system computing voltages and angles at each bus.
Statement – B) AC Load flow studies compute voltages and angles at each bus.
- A is true, and B is false.
- A is false, and B is true.
- Both A and B are true.
- Both A and B are false.
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10. Statement – A) The transmission system has a high X/R ratio. Statement – B) The distribution system has a low X/R ratio.
- A is true, and B is false.
- A is false, and B is true.
- Both A and B are true.
- Both A and B are false.
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