JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III ENERGY STORAGE SYSTEMS Previous Question Paper (February - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
List the roles of Electrical Energy Storage.
Answer
The primary roles of Electrical Energy Storage (EES) are load leveling, peak shaving, frequency regulation, voltage support, and providing backup power during grid outages or supply-demand imbalances.
Why the generation cost is more in peak load periods?
Answer
Generation costs are higher during peak periods because utilities must bring less efficient, quick-start peaking power plants (like gas turbines) online. These plants have higher fuel consumption rates and operating costs compared to base-load plants, and the sudden surge in demand often necessitates purchasing power at premium spot-market prices.
What is smart grid?
Answer
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Outline on emerging needs for EES.
Answer
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What is electrochemical storage system?
Answer
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What is the principle of CAES? Explain.
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What are the standards should maintain for EES?
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Draw Double layer capacitors storage system.
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What is virtual power plant?
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List the new trends in applications of EES.
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Part B
Describe about the characteristics of Electricity.
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Elaborate on consequences happening in power grid due to day by day congestion.
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Appraise the role of Electrical energy storage technologies in view point of utility.
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Explain the role of electrical energy storage technologies in view point of generators of renewable energy.
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Explain the following mechanical storage systems:
Flywheel Energy Storage (FES)
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Pumped Hydro Storage (PHS).
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Explain the following electrochemical storage systems:
Secondary batteries
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Flow batteries.
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Compare the different EES technologies in technical sense and highlight the superior technologies.
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Describe about thermal storage systems and list the advantages and disadvantages.
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With neat block diagram, describe about battery SCADA system.
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Write short notes on:
Management and control hierarchy of storage systems
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Internal configuration of battery storage systems.
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