Given a load factor of 0.48 and installed capacity of 35000kW, reserve over peak of 3000kW and hours out of service of 410 per year. Determine the use factor
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A. 2.) Given a load factor of 0.48 and installed capacity of 35000kW, reserve over peak of 3000kW and hours out of service of 410 per year. Determine the use factor
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- 7. TY Hat CHICL Ans. 1. Iron los.........varies approximately as V². 2. Cu loss..........it also varies as ² but decreases with an increase in voltage if constant kVA output is assumed. 3. Efficiency...........for distribution transformers, efficiency at fractional loads decreases with in- crease in voltage while at full load or overload it increases with increase in voltage and vice- versa. 4. Regulation..........it varies as but decreases with increase in voltage if constant kVA output is assumed. 5. Heating.........for constant kVA output, iron temperatures increase whereas Cu temperatures decrease with increase in voltages and vice-versa. quemsWhat effects are produced by change in voltage? 1. Iron los..........varies approximately as V². 2. Cu loss..........it also varies as V² but decreases with an increase in voltage if constant kVA output is assumed. 3. Efficiency...........for distribution transformers, efficiency at fractional loads decreases with in- crease in voltage while at full load or overload it increases with increase in voltage and vice- versa. 4. Regulation..........it varies as but decreases with increase in voltage if constant kVA output is assumed. 5. Heating.........for constant kVA output, iron temperatures increase whereas Cu temperatures decrease with increase in voltages and vice-versa.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......
- Hoover Dam has a nameplate capacity of 2080 MW[] and an annual generation averaging 4.2 TW·h. (The annual generation has varied between a high of 10.348 TW·h in 1984, and a low of 2.648 TW·h in 1956.) Determine the capacity factor. Ans. 23% (Show the Solutions)2. a) Explain the terms load factor and diversity factor. b) Discuss the advantages of interconnected grid system. c) A generating station is to supply four regions of load whose peak loads are 10 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%. Calculate: (i) the maximum demand on the station, (ii) annual energy supplied by the station and (iii) suggest the installed capacity and the number of units.Explain the concept of FACTS (Flexible Alternating Current Transmission Systems) devices. How do they enhance the control and stability of power systems? Provide examples of FACTS devices and their applications.
- Can we improve a leading load pf using a synchronous condenser? Explain briefly your answerin one(1) sentence.The section bus-bars A and B are linked by a bus-bar reactor rated at 6000 kVA with 12% reactance. On bus-bar-A, there are two generators each of 10 MVA with 8% reactance and on bus-bar-B, two generators each of 6000 kVA with 10% reactance. Find the steady MVA fed into a dead short circuit all phases on B with bus-bar reactor in the circuit.Why rating of an Alternator is expressed in terms of VA,KVA or MVA ? Option 1: As losses are square times of the power factor Option 2: As losses depends on power factor Option 3: As losses are independent of power factor Option 4: As losses are inversely proportional to the power factor.
- Discuss the challenges and solutions for integrating renewable energy sources into existing power grids.Discuss the concept of reactive power and its role in grid stability.21. The total power drawn by two-impedance load in parallel is 15kW at 85% power factor lagging, it's being supplied by 230- volts AC source. One of the loads (Load 1) takes 11KVA at 90% power factor leading. a. What is the real power, reactive power, and the apparent power of the unknown impedance (Load 2)? b. Find the resistance and the reactance of the other impedance load (Load 2). c. Determine the currents on each branch and the total current