Name of the College : DMI College OF Engineering
Department : Electrical And Electronics Engineering
Subject Code/ Name : EE 2401 – Power System Operation & Control
Degree : B.E
Website : dmice.ac.in
Document Type : Question Bank
Power System Operation & Control : https://www.pdfquestion.in/uploads/dmice.ac.in/1670-EE2401.docx
DMI Power System Operation & Control
Unit – I
PART A :
** Define connected load.
** Define Plant Use Factor.
** What is the need for load forecasting?
** Define diversity factor.
Related : DMI College OF Engineering EE2402 Protection And Switchgear B.E Question Bank : www.pdfquestion.in/1689.html
** What is meant by load frequency control?
** Define load factor.
** Define plant capacity factor.
** What is the need of voltage regulation in power system?
** Define the term maximum demand.
** What is a “load curve”?
** Compare load curve & load duration curve.
** Define average load.
** What is the need of frequency regulation in power system?
** Define demand factor.
** What are the various types of loads connected to the system?
** Define utilization factor.
** What is the effect of load factor on the cost of generation?
** What is base load?
** What is spinning reserve?
** What is the purpose of primary ALFC?
Unit II
21. (a) (i) With neat sketch, Describe the P-f and Q-V control structure. (8)
(ii) A generating station supplies the following loads connected to it:
** Industries 95 MW
** Domestic lighting load 5 MW
** Domestic power load 8 MW
** Commercial load 12 MW
** The maximum demand on the station is 92 MW, Calculate the load factor and diversity factor if the total number of units generated in a year is 3×108. (8)
22. (i) what are system level and plant level controls? (6)
(ii) Define diversity factor. Discuss the practical ways to improve the diversity factor. (6)
(iii) Write short notes on Load Forecasting. (4)
23. (a) (i) A generating station has the following daily load cycle. (10)
Time (hrs) 0-6 6-10 10-12 12-16 16-20 20-24
Load (MW) 40 50 60 50 70 40
Draw the load curve and find
Maximum demand
Units generated per day
Average load
Load factor
(ii) Explain the following terms
Installed reserve, spinning reserve, cold reserve.
Or
24. Discuss in detail the recent trends in real time control of power systems. (16)
25. (i) Explain why the frequency should be maintained within a narrow rigid limit. (6)
** (ii) Consider an inductive load of type Z=R+jX.
By how many percent will the real load drop if the voltage is reduced by 5%. (5)
How would a 2% drop in frequency affects the real load, if the load is assumed to have a power factor of 0.8? (5)
26. A generating station has a maximum demand of 20 MW, a load factor of 60% a plant capacity factor of 48% and a plant use factor of 80% Find the
Daily energy produced
Reserve capacity of the plant
Maximum energy that could be produced daily if the plant were running all the time and
Maximum energy that could be produced if the plant when running (according to operating schedule) were fully loaded.(16)
27. Explain the various objectives of power system and various control strategies during its operation. (16)
28. (i) A generating station has a maximum demand of 50,000 kW. Calculate the cost per unit generated from the following data. (12)
** Capital cost = Rs. 95×10^6
** Annual load factor =40%
** Annual cost of fuel and oil =Rs 9×10^6
** Taxes, wages and salaries etc =Rs7.5×10^6
** Interest and depreciation =12%
(ii) Write short notes on economic Dispatch Control (EDC). (4)
29. (i) What is meant by chronological load curve ? Give the information obtained from load curve. (3+5)
** (ii) Highlight briefly the importance of regulating frequency and voltage of the power system. (8)
30. (i) A power station has to meet the following demand
Group A: 200 kW between 8 A.M and 6 P.M
Group B: 100 kW between 6 A.M and 10 A.M
Group C: 50 kW between 6 A.M and 10 A.M
Group D: 100 kW between 10 A.M and 6 P.M and then between 6 P.M and 6 A.M
Plot the daily load curve and determine diversity factor, units generated per day and load factor. (8)
(ii) Discuss about the recent trends in real time control of power systems. (8)