A chilled water system for a church complex is designed as shown in Fig. 10-36 with chilled water storage for short periods of peak load. The chillers have a combined capacity of 80 ton (280 kW) and the total peak cooling load is estimated to be 100 tons (352 kW), which may las

Calculate Current Io, In The Circuit Of Fig. 10.11

Employ phasor analysis techniques to obtain expressions for the two mesh currents i1 and i2 as shown in Fig. 10.61. Circuit attached in image.

Solve 10,11,12

S. 10

25. Corona, when it occurs, is always accompanied by Power Loss. Select one: True False

An example power system has two distinct manufacturing areas, one with harmonic loads, and another with only linear loads. The portion of the system with the harmonic loads draws 75 A rms at 60 Hz, 10 A rms at 300 Hz, and 5 A rms at 420 Hz. The part of the system with only linear loads draws 75 A rms at 60 Hz.   (i) What is the total load current (at 60 Hz) if both manufacturing plants are running? Calculate the THD.   (ii) What is the total load current (at 60 Hz) if only the manufacturing plant with harmonic loads is running? Calculate the THD.

TRUE OR FALSE? On the electric power grid, supply must equal demand at all times, otherwise frequency can swing outside the accepted limit. Storage, transmission, and demand response can help to meet this constraint.

S.2) The serial impedance of the 300 km power transmission line is 23 + j75 ohm / phase and the shunt acceptance is j500 microS / phase. A power of 50 MW with a power factor of 0.88 under 220 kV interphase voltage from the end of the power transmission line being shot. Using these data of the energy transmission line, a) Characteristic impedance of the energy transmission line, b) Natural apparent power of the energy transmission line according to the 220 kV interphase operating voltage, c) The values ​​of the line parameters A, B, C and D of the transmission line using hyperbolic functions, d) Calculate the maximum power that the power transmission line can transmit.

Two buses are interconnected by a transmission line of impedance (0.03 + j0.012) pu. The voltage on one bus is 1/0°, and the load on the other bus is   (1 + j0.4) pu. Determine the voltage on the second bus. Also calculate the real and reactive power on the first bus.