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What is the use of reactance relay?
reactance relay is used for distance protection of the transmission line....
In electrical power transmission the line must have reactance to flow of the power without the reactance the power cannot flow please answer for this if required give mathematical expression thanx?
Electrical transmission lines do have reactance, but it is not necessary for power to flow. In fact, the smaller the reactance, the higher the efficiency of the transmission system. Reactive power is not delivered to the load, it does no useful work, it just costs money to generate and causes heating of the conductors.
In order to reduce inductive reactance what devices are normally placed on transmission or distribution lines?
== == Add a capacitor or a synchronous motor or a phase advancer to the transmission line so that it can nullify the effect of inductive reactance since the above elements gives capacitive reactance. Doing this also improves the power factor.
What is R Resistance per KM and X reactance per KM Value of panther conductor in single circuit transmission line?
DC Resistance = 0.1362 Ohms/km Reactance depends upon line configuration and spacing
What is the purpose of line trap?
A line trap is a set of physically-large inductors often seen hanging from transmission towers at the end of a high-voltage transmission line, where the line terminates at a substation. As transmission lines often carry data signals, which operate at frequencies very much higher than the 50-Hz (or 60-Hz) power frequency, the high inductive reactance* of the line traps act to prevent these signals from continuing beyond the end of that section of transmission line, while having an insignificant effect on the power-frequency load current.(*Inductive reactance is directly proportional to frequency)
Is reactance major responsible for power loss in power transmission lines?
Reactance certainly causes loss in a transmission system, but I^2R or resistance losses are greater.
What is relationships of capacitive reactance to resistance?
when ever current passing through any two parallel transmission line than due to the dieletric property of conductor some what capacitance effect will be generate between them that phenomina called as capitance reactance/////////////////// that symply we can called capitance reactance is measure of capitance The reactance of a capacitor is its resistance.
What to do to increase transmission line loading?
Power to be transmiteed is calculated by using following formula P= (E1*E2/ X)*sin(delta) X= Line reactance = XL-Xc XL= Inductive Reactance Xc=Capacitive Reactance P= Power to be transmitted. Thus , Increament in delta increase P Decreament in X increases P For this we use series, parallel, Combination of both compensation FACTS Devices.
Since when has fixed capacitor have been seen in use on transmission line?
Capacitors have always been added on both power lines and telephone lines to compensate for the build up of inductive reactance in long runs of wire.
What are the Advantages of Corona in transmission lines?
Due to corona effect virtually conductor size is increase and therefor resistance in transmission line is decreases.so I2R losses will decreases...
Why capacitance is neglected in short transmission lines?
Wen the length of overhead transmission line is less than 80 km with an operating voltage up to 20kv it is considered as short transmission lines Due to smaller lengths and low operating voltage the charging current is low so the effect of capacitance of short transmission lines is extremely small and therefore can be neglected as in case of distribution lines and only R L is to be taken into account while analyzing short transmission lines
What are the advantages of line management?
what are the advantages of line management?
