People say that there is a capacitive current in high voltage DC (HVDC) system. What is it?
People say that there is a capacitive current in high voltage DC (HVDC) system. What is...
Explain the following related to AC-DC power transmission: (i) Need of HVDC power Transmission system (any four points ) (ii) Draw and explain block diagram of conversion of HVDC—LVAC—Load. (iii) Name any two HVDC lines in world with voltage ranges and distance .
In a large battery-storage system, the rated output voltage of a battery string is 650V (dc) and the rated current is 1200A. The voltage can vary in a range from 500V to 800V. This output voltage is boosted to 900V (dc), as an input to an inverter that interfaces with the three-phase utility grid. A switching power-pole with a bi-directional power capability is used. The switching frequency is selected to be 50kHz, and the inductor value is selected such that...
d. Its stored energy is proportional to the DC voltage across I. e. Its DC current depends on time. 7. Which statements are true of an inductor? a. It can be used as a high-pass filter. b. It can be used as a low-pass filter. c. Its impedance is directly proportional to the frequency of the AC current through it. d. Its stored energy is proportional to the DC voltage across it. e. Its DC current depends on time. 8....
A simple DC circuit is shown below with ideal current and voltage sources. Find the voltage (Vout) across the current source, in volts. 212 10 V 5A out
For the DC cicuit show below, find the voltage and current across each resistor. The voltage source is 40V. Find the power dissipations in R1 and R3. Click on the circuit to view a larger image 20 , RB 500 2, Rc RA 400 , and Rp 75 - - Current through RA A Voltage drop across RA V Power dissipation in RA W Current through Rg A Voltage drop across R V Current through Rc = A Voltage drop...
For a RC circuit if C- 1uF and the DC source voltage is 12 V, design the resistor R such that the capacitor voltage reaches 10v 15 sec after the switch is closed ? What is the time constant of the resulting circuit? (5 pts) Switch S E, 9 b) How does the capacitive reactance of a 1 micro-farad capacitor and the inductive reactance of a 10 milli-henry inductor change in a AC circuit when the frequency changes from 50...
QUESTION 1 While connecting a DC system to the AC system using an inverter, the DC voltage is lower than the voltage at the AC system O True O False
Currents in DC transmission lines can be relatively high. Some people have expressed concern that the electromagnetic fields from such lines near their homes could cause health dangers. For a line with current 150 A and at a height of 8 m above the ground, what magnetic field does the line produce at ground level? Express your answer as a percent of the Earth's magnetic field, which is approximately 5
part g Q4. Most electronic systems need a dc voltage to work properly. The AC-to-DC power supply system is including a transformer, a rectifier and a capacitor input filter. The AC input voltage is 110 Vrms at 60 Hz. (a) Draw the full wave bridge rectifier circuit with transformer which steps down voltage to safer and lower levels that are more suitable for use with diodes (b) Show how the capacitor input filter connects to the rectifier output in the...
What component in a power supply converts ac line voltage to dc voltage? What component in a power supply converts ac line voltage to dc voltage? Multiple Choice Transformer Rectifier diode O Resistor O Capacitor