* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download For the three-phase circuit given in this problem, firstly we... balanced or unbalanced system.
Mercury-arc valve wikipedia , lookup
Ground (electricity) wikipedia , lookup
Mechanical-electrical analogies wikipedia , lookup
Power inverter wikipedia , lookup
Stepper motor wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Electrical ballast wikipedia , lookup
Transmission line loudspeaker wikipedia , lookup
Power engineering wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Power MOSFET wikipedia , lookup
Schmitt trigger wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Two-port network wikipedia , lookup
Voltage regulator wikipedia , lookup
Power electronics wikipedia , lookup
Distribution management system wikipedia , lookup
Opto-isolator wikipedia , lookup
Buck converter wikipedia , lookup
Surge protector wikipedia , lookup
Current source wikipedia , lookup
Electrical substation wikipedia , lookup
Nominal impedance wikipedia , lookup
Stray voltage wikipedia , lookup
Voltage optimisation wikipedia , lookup
Network analysis (electrical circuits) wikipedia , lookup
Zobel network wikipedia , lookup
History of electric power transmission wikipedia , lookup
Impedance matching wikipedia , lookup
Alternating current wikipedia , lookup
For the three-phase circuit given in this problem, firstly we want to determine if it is a balanced or unbalanced system. We then want to find the current in phasor domain. The circuit can be divided into three portions: the source, the transmission line, and the load. Let’s take a look at the voltage sources. For the three voltage sources, all of them have a magnitude of 120 V. The phase angle difference between any of the two voltage sources is 120°. The voltage sources are a set of balanced three-phase voltages. Let’s look at the internal impedance for each of the voltage sources. All of them are 2Ω resistors, so the impedance of each phase of the voltage source is the same. Let’s look at the transmission line. For each phase, the transmission line impedance is a 1Ω resistor. For each phase, the impedance of the transmission line is the same. Let’s look at the load impedance. For each phase, it is 20+j50 Ω. The impedance of each phase of the load is the same. Based on the conditions, we can determine that the circuit is a balanced three-phase circuit. For the circuit, we can pick out the negative terminal for the sources as a reference node, so it’s 0 V here. It can be proven that the voltage VN should be 0 V for a balanced three-phase circuit. We can easily find that I should be 0 A.