Activity 2 Visual Presentation Skills Dr Tanaya Datta

Activity 2: Visual Presentation Skills Dr. Tanaya Datta Das RC 1263 Techno India Salt Lake Date: 07/10/2018 1 Foundation Program in ICT for Education: FDP 101 X 7/10/2018

2 Activity 1 on 6/10/2018 NPTEL Video “Lecture 29: Load-flow of radial distribution network” from the Course: Power system Engineering. Screen shots from NPTEL video Foundation Program in ICT for Education: FDP 101 X 7/10/2018

3 Reflection Spots Time: 12: 56 Dear students let us consider a distribution system which supplies a domestic area like your residence. What kind of supply is made available at your house? That is single phase or three phase? This would lead to my second reflection point If house-loads are connected to a single phase system, then how do we get a balanced distribution system? Photograph from: https: //www. bbc. com/ news/world-asia-india -43946049 Foundation Program in ICT for Education: FDP 101 X 7/10/2018

4 Answer to Reflection spots 1. Single phase for single houses and three-phase for large residential complexes with dedicated distribution transformers. 2. We try to balance the system by distributing this single phase loads in different phase as far as possible. However, this system is generally unbalanced in nature. Foundation Program in ICT for Education: FDP 101 X 7/10/2018

5 Lb. D 1. 1 Why a different load flow technique is used for radial distribution networks? a. Load flow solution for radial distribution network involves solution of simple algebraic expressions b. R/X ratio is high and hence solution techniques like Newton-Raphson may fail. c. Distribution system is at a different voltage level as compared to the transmission system. d. The Distribution system is generally unbalanced in nature while the transmission system is not. Foundation Program in ICT for Education: FDP 101 X 7/10/2018

6 Answer & Feedback to Lb. D 1. 1 Answer to question 1 is both (a) and (b). Though (c) and (d) are true as statements, different voltage levels don’t matter in the choice of load-flow techniques as we generally conduct the load flow in per-unit system. Modifications are available for solving both unbalanced transmission and distribution networks. Foundation Program in ICT for Education: FDP 101 X 7/10/2018

7 Lb. D 1. 2 What do you mean by composite loads? a. Constant P-Q loads. b. Constant Current loads. c. Constant Impedance loads. d. Combination of all the above options. Foundation Program in ICT for Education: FDP 101 X 7/10/2018

8 Answer & Feedback to Lb. D 1. 2 Answer to question 1 is (d). Composite loads are a combination of all types of loads. In practical systems, we have combinations of motor load, illumination or lighting loads, heating loads, arc furnaces and so on. These can be represented by suitable combinations of loads given in (a), (b) and (c). Courtesy: http: //energyzedworld. c om/index. php/2015/10/ 21/understanding. Foundation Program in ICT for Education: FDP 101 X electrical-loads/ 7/10/2018

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