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## Power System Operation & Control Imp Qusts Pdf file – PSOC Important Questions

Please find the attached pdf file of Power System Operation & Control Important Questions Bank – PSOC Imp Qusts

Link – PSOC Question Bank

**UNIT-I**

Economic Operation of Power Systems-1

- Define in detail the following:

i.Control variables

ii.Disturbance variables

iii.State variables. - Draw incremental fuel cost curve.
- Explain the significance of equality and inequality constraints in the economic al- location of generation among different plants in a system.

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**UNIT-II**

Economic Operation of Power Systems-2

- Draw flow chart for economic scheduling without considering line losses.
- Explain optimal load flow solution without inequality constraints.
- Derive transmission loss formula in terms of B- coefficients.

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**UNIT-III**

Hydrothermal Scheduling

- Discuss the combined hydro- electric and steam station operation.
- Describe different methods for solving hydro thermal scheduling.
- What are the requirements of control strategy in integral control? Explain the role played by the controller’s gain setting in the frequency control.

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**UNIT-1V**

Modeling of Turbines

- Describe the mathematical model of Speed – Governing System.
- Explain D.C excitation system and A.C excitation system.
- Derive the model of a speed governing system and represent it by a block diagram.

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**UNIT-V**

Single Area Load Frequency Control

- Explain the necessity of keeping the frequency constant in a power system.
- Explain what is meant by control area. Obtain the transfer function model and explain ALFC of a single area of an isolated power system.
- Write notes on:

i)Control area concept.ii)Area control error.

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