7. A power station has to meet the following load demand: Load A 50 kW between 10 A.M. and6 P.M. Load B 30 kW between 6 P.M. and 10 P.M. Load C 20 kW between 4 P.M. and 10 A.M. Plot the daily load curve and determine (i) diversity factor (ii) units generated per day (iii) load factor. () 1-43 (ii) 880 kWh (iii) 52-38%]

7. A power station has to meet the following load demand: Load A 50 kW between 10 A.M. and6 P.M. Load B 30 kW between 6 P.M. and 10 P.M. Load C 20 kW between 4 P.M. and 10 A.M. Plot the daily load curve and determine (i) diversity factor (ii) units generated per day (iii) load factor. () 1-43 (ii) 880 kWh (iii) 52-38%]

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Table Q2a Time (hours) 0-6 6-12 12-14 14-18 18-24 Load (MW) 45 90 135 150 75 Referring to the Table Q2a; i) Draw the load curve and the load duration curve [Use the graph paper provided] ii) Indicate the base load and the peak load on the graph. Determine the values for both loads. iii) Choose the suitable generating units to supply the load and list their operating schedules. Later, compute the total installed capacity. iv) Calculate the load factor and the plant capacity factor. Discuss the impact on the operating schedule if the plant capacity factor increases to 0.9.
A generating station is to supply four regions of load whose peak loads are10 MW, 5 MW, 8 MW and 7 MW. The diversity factor at the station is 1-5 and the average annual load factor is 60%. Then the installed capacity is (25 to26)MW. O (24 to25)MW. O (23 to24)MW. O
The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......
The per unit impedance of a generator on a 60 MVA, 20 kV base is j0.09 p.u. The per unit impedance to a 100 MVA, 20 kV base will be (a.) j0.054 p.u. (c.) j 1.5 p.u. (b.) j0.54 p.u. (d.) j0.15 p.u.
The indication of a lagged demand meter approaches the value of the actual load at a rate which is proportional to A. Quotient of the load and the meter indication. B. product of the load and the meter indication C. Difference between the load and the meter indication D. sum of the load and the meter indication
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As seen in the figure, three generators of 800 kW, 900 kW and 1000 kW are connected in parallel. It generators feed 380 kW load. Frequency-active power graphs of generators are shown as given. According to this; a. Calculate the operating frequency for the situation given in the question.b. Calculate the power transferred by the generators to the load.c. A three-phase asynchronous load of 800 kW and 600 kVA with a reverse power coefficient of 0.78 is installed in the system. engine is connected. The new operating frequency of the system and the active power of the alternators. calculate.d. Do you think the generators in this system are suitable for parallel connection as in the figure?
A generator operating at 50 Hz delivers 1 p.u. power to an infinite bus through a transmission circuit in which resistance is ignored. A fault takes place reducing the maximum power transferable to 0.5 p.u. Where as before the fault, this power was 2.5 p.u. and after the clearance of the fault, it is 2 p.u. The value of 8 is max
For a power station the yearly load duration curve is a straight line from 40,000 to 3000 kw. To meet the load three turbo-generators are installed. The capacity of two generators is 15,000 kw each and the 3d is rated at 6,000 kw. Determine the following a) Load factor. b) Capacity factor. c) Maximum demand.
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The peak load on a 50 MW power station is 39 MW. It supplies power through for transformers whose connected loads are 17, 12,9 and 10 MW. The maximum demands on these transformers are 15, 10, 8 and 9 MW respectively. The annual load factor is 50% and the plant is operating for 65% of the period in a year. 102. The average load on the station is (A) 50000 kW (C) 39000 kW (B) 19500 kW (D) 48000 kW. 103. The energy supplied per year is (A) 438 x 106 kWh (C) 170.82 x 106 kWh (B) 341.64 x 106 kWh (D) 420.48 x 106 kWh.
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