Sage-Tips

When the spacing between the conductor increases then the inductance of the given transmission line?

Inductance of a transmission line Therefore, if we increase the spacing between the phase conductors, the value of line inductance will increase.

Does inductance increase with distance?

When the spacing is increased, the air gap increases between conductors, so reluctance increases, so flux linkages decrease, so inductance must decrease, as L = flux linkages / current.

How inductance and capacitance of transmission line are affected by the spacing between the conductor?

The spacing between the conductors in an overhead line is directly proportional to inductance and inversely proportional to capacitance. Hence as spacing of overhead line is increase, the line capacitance decreases but line inductance increases.

When the length of the line increases its inductive reactance?

Detailed Solution. Here X is inductive reactance. If the inductance of line increases, inductive line also increases and hence power transmission capacity will decrease.

What effect does a decrease in the phase spacing of conductors in a single phase or three phase overhead line have on the the inductance per phase?

Decreasing of distance between line phases leads to increasing of mutual capacitance (and mutual electromagnetic influence).

Why conductor sag should be kept minimum?

The conductor sag should be kept to a minimum in order to reduce the conductor material required and to avoid extra pole height for sufficient clearance above ground level.

What is the effect of temperature rise on the overhead lines?

Explanation: An increase in temperature in overhead lines leads to expansion of length and causes sag thereby decreasing the stress.

What is the effect on the current flow with increased diameter of conductor?

Explanation: Increased diameter of conductor allows high current flow.

What happens if the separation between the three phases of the transmission line is increased?

If the separation between the three phase of a transmission line is increased then. the inductance will increase and capacitance will remain unchanged.

What happens to inductance when conductor spacing is increased?

When the spacing is increased, the air gap increases between conductors, so reluctance increases, so flux linkages decrease, so inductance must decrease, as L = flux linkages / current. Why does inductance physically increase with increase in conductor spacing?

What happens if the inductance of a transmission line increases?

If series inductance increased, this means that your transmission line voltage drop will increase, and also the loadability (i.e. the max power that can be transferred over the transmission line) will decrease. And more current will be drawn, higher losses and bad efficiency.

What happens to capacitance when conductors move away from each other?

If the conductors are moved away from each other, the distributed capacitance will decrease (greater spacing between capacitor “plates”), and the distributed inductance will increase (less cancellation of the two opposing magnetic fields).

What are the effects of increasing inductance and shunt capacitance?

The effect of increasing the inductance will increases the voltage drop between the sending and receiving ends of the line and reduce the power transfer capability. Increasing the shunt capacitance will increases the charging current.