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- A string of suspension insulators consists of three units. The capacitance between each link pin and earth is one-sixth of the self-capacitance of each unit. If the maximum voltage per unit is not to exceed 35 kV, determine the maximum voltage that the string can withstand. Also calculate the string efficiency. [84-7 kV; 80-67%]The below table shows all the combinations considered when solving a unit commitment problem involving 3 thermal units, along with each unit's cost (in $/h) obtained when solving the economic dispatch for each combination. Unit 1 Unit 2 Unit 3 F, ($/h) F2 ($/h) F3 ($/h) Off Off Off infeasible infeasible infeasible Off Off On infeasible infeasible infeasible Off On Off infeasible infeasible infeasible Off On On 3,855 1,753 On Off Off 5,484 On Off On 5,006 681 On On Off 3,125 2,535 On On On 2,882 2,339 681 Which one of the below combinations is the solution of the unit commitment problem? Select one: O a. Unit 1: ON, Unit 2: ON, Unit 3: OFF O b. None of these c. Unit 1: ON, Unit 2: OFF, Unit 3: ON O d. Unit 1: ON, Unit 2: OFF, Unit 3: OFFThe below table shows all the combinations considered when solving a unit commitment problem involving 3 thermal units, along with each unit's cost (in $/h) obtained when solving the economic dispatch for each combination. Unit 1 Off Off Off Off On On On On Unit 2 Off Off On On Off Off On On Unit 3 Off On Off On Off On Off On F₁ ($/h) F₂ ($/h) F3 ($/h) infeasible infeasible infeasible infeasible infeasible infeasible infeasible infeasible infeasible 1,753 0 3,855 5,484 0 0 5,006 0 681 3,125 2,535 0 2,882 2,339 681 Which one of the below combinations is the solution of the unit commitment problem? Select one: O a. None of these O b. Unit 1: ON, Unit 2: OFF, Unit 3: ON O c. Unit 1: ON, Unit 2: ON, Unit 3: OFF d. Unit 1: ON, Unit 2: OFF, Unit 3: OFF
- There are 144 fuel cells are joined in a series through interconnects.there will be 4 stacks having 36 cell in each stack.these stacks are then oragnised in series and parallel combination to form a single module to deliver required voltage and output power.this SOFCs module then combined with CHP system to get thermal . From this data answer the following questions. a)Calculate voltage losses of module?.this question is very compulsory. b)Electrical efficiency of module? C)Thermal efficiency when module combine with CHP system? D)Combined electrical and thermal efficiency? The input parameters of single cell are given below: Ocv=1.020 Current density=2250mA/cm2 Power density=850mw/cm2 Cell active area= 121cm2 Net power=15kw System fuel utilization=80% Operating temp=550°c Cell voltage=0.8v Power of single cell=103 watt.Draw the circuit diagram of Two quadrant chopper which is having average load voltage might be positive or negative. Explain each quadrant operation with neat sketch. I want more than 350 words and I do not want it in handwritingTOPIC: Power Systems, Power Plants & IlluminationINSTRUCTIONS:- Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer.- Step-by-step solution, do not skip even simple calculations to avoid confusion.- If answered in written form, make sure it is readable.PROBLEM:A 55000-kW thermal plant of National Power Corporation delivers an annual output of 238000000 kw-hr with a peak load of 44 MW. What is the capacity factor? 49.4% 42.4% 48.2% 44.6%
- In an overhead line, there are three units in the string of insulators having line voltage of 33kV. If the shunt capacitance between each insulator pin and earth is 0.11 times than self-capacitance of each insulator, (i) Calculate the distribution of voltage over 3 insulators. (ii) Explain to how to make uniform voltagesNote : You have to click SUBMIT before the end of the time. So when the invigilator announce that you F click SUBMIT, then you must click it, otherwise your answers will not be saved. Hi, Mohammed Salim Ahmed Al. When you submit this form, the owner will see your name and email address. Assume that 8oW bulb and 100w bulb are connected in parallel and supplied by 240V ac .When 80w bulb is damaged then .. O Circuit breaker will trip and supply will be cutoff O 100 w bulb also will get damaged after some time O 100w bulb will glow very dim O 100w bulb will continue to glow with same brightness 32°C Sunny A O D 40) G E Chp prt sc delete home 8 backspace { O L 1. pauseIn a string of suspension insulator with three units,the line unit has 12k and k=0.15. The voltage across string is and the efficiency is .?: a. 41.6kV & 69.4kV b. 33.62kV & 74.7% C. 29.52kV & 82% d. 36.9kV & 82%