What is the effect of reactance on transmission line?
The reactance of the line will also increase that will demand more current to maintain the same voltage. The increased line current means more line losses. The eddy current and hysteresis losses in the transformer will increase.
Why is reactance used?
Reactance (also known as electrical reactance) is defined as the opposition to the flow of current from a circuit element due to its inductance and capacitance. The reactance is used to compute this change in phase and magnitude of the current and voltage waveforms.
What are the advantages of series connection of transmission line?
Series compensation has several advantages like it increases transmission capacity, improve system stability, control voltage regulation and ensure proper load division among parallel feeders.
Why resistance is used in transmission line?
For short lines, resistance plays an important role. As the line current increases so do the ohmic loss (I2R loss). When the current exceed a certain value the heat generated due to ohmic loss starts to melt the conductor and the conductor becomes longer that results in more sag.
What are the effects of transmission line?
The physical presence of transmission lines can have an effect on wildlife. These potential effects include long-term changes to habitat, bird strikes, access issues, noise effects and associated avoidance behaviour, and electric and magnetic fields.
What is the impedance of capacitor?
Impedance of a capacitor The resistance of an ideal capacitor is zero. The reactance of an ideal capacitor, and therefore its impedance, is negative for all frequency and capacitance values.
What is difference between resistance and reactance?
Resistance and reactance are the properties of an electrical circuit that opposes the current. The main difference between reactance and resistance is that resistance measures the opposition to a flow of current, whereas reactance measures the opposition to a change in current.
What power factor means?
Power factor is an expression of energy efficiency. It is usually expressed as a percentage—and the lower the percentage, the less efficient power usage is. Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA).
What are the advantages and disadvantage of series and parallel connection?
Complete answer:
| Advantages | Disadvantages |
|---|---|
| We know that the voltage remains constant in the parallel connection. Therefore, each component in the circuit gets the same amount of voltage. | To construct the parallel connection, we need lots of wires. |
Why is parallel better than series?
The two bulbs in the parallel circuit are powered by the same battery. The bulbs in the parallel circuit will be brighter than those in the series circuit. If one loop is disconnected, the other remains powered, which is an advantage to the parallel circuit.
What is the function of transmission lines?
The term Transmission Lines broadly refers to overhead transmission lines and underground cables. The key function of a transmission line is to transfer bulk power between generation sources and load centres.
What is the reactance of a transmission line?
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle? Q16. Under over excitation synchronous phase modifier works as Q17.
What are the advantages of a higher voltage transmission line?
Advantages of higher transmission voltage is/are Q7.Maximum power transfer capability of transmission line can be increased by Q8. For flat voltage profile system, voltage regulation is Q9. Maximum power transfer in a transmission line can be obtained by
How to increase the stability of a transmission line?
Stability of a transmission line can be increased by Q14. Which of the following method is used for changing power factor from leading to lagging Q15. A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power.
What are the objectives of an electrical transmission system?
Objectives of electrical power transmission is/are Q5. Advantages of higher transmission voltage is/are Q7.Maximum power transfer capability of transmission line can be increased by Q8. For flat voltage profile system, voltage regulation is Q9. Maximum power transfer in a transmission line can be obtained by