a power station has a connected load of 48MW. the energy generated for the year is 61500MWh. if the station has a load factor of 35%. solve the demand factor of the station.
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- A SUBSTATION RATED 1250 KVA IS OPERATING AT FULL LOAD AT 0.8 PF LAGGING AND TO CARRY AN ADDITIONAL LOAD OF 170 KW AT 0.85 PF LAGGING. WITH THE MENTIONED POWER FACTOR, THE SUBSTATION IS EXPERIENCING AN INEFFICIENT ELECTRICAL SYSTEM: HIGH POWER LOSSES, HIGH VOLTAGE DROPS IN THE ELECTRICAL EQUIPMENT, AND HIGH ELECTRICITY BILLS. TO REDUCE POWER LOSSES AND TO REDUCE THE ELECTRICITY BILL, POWER FACTOR CORRECTION IS TO BE OF HIGH IMPORTANCE AND CONSIDERATION. Make a total power triangle (phasor diagram) for Alternate A additional substation capacity in KVA and Alternate B shunt capacitor in KVAA SUBSTATION RATED 1250 KVA IS OPERATING AT FULL LOAD AT 0.8 PF LAGGING AND TO CARRY AN ADDITIONAL LOAD OF 170 KW AT 0.85 PF LAGGING. WITH THE MENTIONED POWER FACTOR, THE SUBSTATION IS EXPERIENCING AN INEFFICIENT ELECTRICAL SYSTEM: HIGH POWER LOSSES, HIGH VOLTAGE DROPS IN THE ELECTRICAL EQUIPMENT, AND HIGH ELECTRICITY BILLS. TO REDUCE POWER LOSSES AND TO REDUCE THE ELECTRICITY BILL, POWER FACTOR CORRECTION IS TO BE OF HIGH IMPORTANCE AND CONSIDERATION. ANSWER: CITE A STEP BY STEP SUMMARY OF HOW TO DETERMINE THE POWER FACTOR CORRECTION REQUIRED IN THE GIVEN PROBLEM TO ARRIVE AT THE ALTERNATIVE THAT SHALL BE SYSTEMATICALLY CARRIED OUT TO GUARANTEE A SUCCESSFUL DECISION IMPLEMENTATION,1. Consider a building with a real power demand of 650 kW and reactive power demand of 480 KVAR. Determine the current power factor and then find the required size of a set of capacitors to be installed in parallel with the building service entrance so that the power factor becomes at least 0.90.
- (b) An inductive load consisting of resistor, R and inductor, L in series feeding from a 240430° Vrms, 50 Hz supply consumes 6 kW at lagging power factor of 0.88. (i) Determine the current through the load. (ii) Find R and L. (iii) Draw the phasor diagram of supply voltage and current.A substation rated 1250 kVA is operating at full-load at 0.8 pf lagging and to carry an additional load of 170 kW at 0.85 pf lagging. With the mentioned power factor, the substation is experiencing inefficient electrical system: high power losses, high voltage drops in the electrical equipment, and high electricity bill. To reduce power losses and to reduce the electricity bill, power factor correction is to be of high importance and consideration. Find: power phasor diagram. computation of the following: additional substation capacity in KVA shunt capacitor KVA. Which alternative is more economical if cost/kVA of additional substation capacity is $400.00 and the cost/kVA of shunt capacitor is $180?A substation rated 1250 kVA is operating at full load at 0.8 pf lagging and to carry an additional load of 170 kW at 0.85 pf lagging. With the mentioned power factor, the substation is experiencing inefficient electrical system: high power losses, high voltage drops in the electrical equipment, and high electricity bill. To reduce power losses and to reduce the electricity bill, power factor correction is to be of high importance and consideration. In this regard, the owner requested to prepare a summary report consisting of the following details: A rightful power phasor diagram.
- Q.3 (a) The short circuit MVA at the terminal of generating Station A and B are 1100 MVA and 1200 MVA respectively. The generated voltage at each station is 33 kV. If these stations are interconnected through a line having a reactance of 1.5 2 and negligible resistance, calculate the possible short-circuit MVA at both station. Choose 100 MVA as base. (b) A power system is represented by one line diagram in Figure Q.3(b). Each bus is rated at line voltage of 66 kV. The reactance of each component is given in per unit, based 100 MVA and rated voltage of the component. Assume that the prefault voltage of each generator is to be 1.0 per unit. Bus impedance matrix with all elements in per unit for the system is given below: j0.138 j0.112 j0.130 j0.138 j0.121 Zj0.112 jo.130 j0.121 j0.160 A solid three phase fault occurs at bus 1. Determine: (i) Fault current (in Ampere) and fault level (in MVA) at Bus 1. (ii) Transmission lines current (in Ampere) during fault. If line L23 is connected in…A substation rated 1250 kVA is operating at full-load at 0.8 pf lagging and to carry an additional load of 170 kW at 0.85 pf lagging. With the mentioned power factor, the substation is experiencing inefficient electrical system: high power losses, high voltage drops in the electrical equipment, and high electricity bill. To reduce power losses and to reduce the electricity bill, power factor correction is to be of high importance and consideration. With this condition, the substation is considering of two alternatives namely: Alternative A: To increase the capacity of the substation Alternative B: To add shunt power capacitor In this regard, the owner requested to prepare a summary report consisting of the following details: 1. A rightful power phasor diagram.Referring to the Figure 2, compute the following values, given that the operating frequency is 60Hz and the voltage is 120V: (a) The inductive reactance (b) Source current (c) Apparent power, active power and reactive power Sketch and illustrate the power triangle with proper labelling, units and values. E 160 150 mH Figure 2
- 5. The maximum load on the Thermal Plant of 60MW capacity is 50MW at an Annual Load Factor of 50%. The loads having maximum demands of 25MW, 20MW, 8MW & 5MW are connected to the power station. Determine: a) Average Load on the power station b) Energy generated per year c) Demand factor d) Diversity FactorA resistor, in series with a 138-microfarad capacitor, is connected to a 60-cycle source.If the voltage drop across the capacitor is 115 volts and the power taken by the circuitis 922 watts, calculate (a) the circuit current, (b) the ohmic value of the resistor, (c) theline voltage, (d) the circuit power factor. draw the circuit diagram(a) A central power station has annual factors as follows: Load factor = 60%; Capacity factor = 40%; Use factor = 50%; Power station has a maximum demand of 15000 kW. Determine: i. Annual energy production ii. Reserve capacity over and above peak load iii. Hours per year not in service. (b) Give a brief note on: i. Connected load ii. Maximum demand iii. Demand factor