Why transpose transmission lines

The transposition balance the capacitance of the line due to which the voltage is also balanced. Frequently changing the position of conductors weakens the supportive structure which increases the cost of the system. Your email address will not be published. One benefit of this method is that phase A could remain conductor 1 throughout the length of the transmission line. Practical transposition, like that described above, minimizes system imbalance caused by conductor positioning, but does not completely remove it.

The system becomes more and more balanced as the number of transposition cycles increase and hence the segment lengths decrease , from one end to the other. For studies where it is desirable for line to be completely balanced, the LCP provides an option called 'Ideal Transposition'. Ideal transposition is a mathematical average of the unbalanced line.

This is equivalent to visualizing an infinite number of transposition cycles, where the line segment length approaches zero. The result is a series impedance matrix Z and a shunt admittance matrix Y that are perfectly symmetrical and balanced. The PSCAD Master Library supplies a few towers containing multiple circuits, which include additional options for ideal line transposition.

When using these components, users may opt to either transpose each circuit separately, or include all circuits in the transposition calculation. If the latter option is chosen, then the transposition procedure is as described in the previous section. Notify me when new comments are added. When conductors such as telephone lines are run in parallel to transmission lines, there is a possibility of high voltages induced in the telephone lines. So would be benefited by reducing one more tower design, approval, and results in a reduction of overall project time, etc.

It is proved more economical Solution, in comparison of the conventional transposition system. With the continuous increase in demand for power, a lot of new transmission line project are coming, and simultaneously it has become very important to Complete the line in shortest possible time. For lines longer than km to km, transposition of phases carried out with a special tower, to reduce electrical line losses. There is need to adopt different approaches of transposition arrangement, which is not only cost effective but also It can.

The new method proposed herewith basically simplifies the engineering activity, and expedites the project completion Following are the main aspect of the Proposed method of transposition. Excellent subject matter.