Technical and economical optimisation of overhead power distribution line lightning protection

Optimisation of arrester location in risk assessment in distribution network

“…Table 6 shows characteristics of 10 random nodes from 1059 interesting nodes of the network with their relative weights. The economical index E i has been calculated assuming the observed period of line exploitation equal to 25 years (Y = 25), C NPC = 0.07 (£/kW) and C NEC = 2.19 (£/kWh) [19]; the interest rate is I R = 10%. C Tmax = 794 (£/year) belongs to pole no.…”

An optimal design method for improving the lightning performance of overhead high voltage transmission lines

“…., N region number, J i is the performance cost index of the ith region, k i (·) the annual line failure cost, g ji (·) the equivalent annual investment of the ith region line design characteristic j, N Ti the total flashover failure rate of region i, U αi the insulation level of region i and R i is the grounding footing resistance of region i. The annual line failure cost is given from the equation [18]:…”

“…In an effort to maintain failure rates in a low level, providing high power quality and avoiding damages and disturbances, plenty of lightning performance estimation studies have been conducted [1][2][3][4][5][6][7][8][9][10][11][12][13] and several design methodologies have been proposed [14][15][16][17][18][19]. Designing appears to be the most important issue in the lightning performance of a transmission line, not only because differences in the design parameters values affect significantly the lightning performance but also because is practically impossible to make improvements and modifications in an existing transmission line.…”

“…Saied et al [17] presented a method for the optimal design of overhead high voltage transmission lines with main objective the minimization of the line total annual cost, considering the relevant technical constraints and both fixed and running cost items. Katic and Savic [18] analysed the economical aspects of the overhead distribution line lightning performance taking into account customer and utility costs of line outages. An alternative design procedure for uncompensated overhead transmission lines introduced from Saied [19].…”

Cost related optimum design method for overhead high voltage transmission lines

“…In Reference [3] a range of line optimization techniques has been introduced, which can be applied to decide whether standard or optimized line designs are appropriate, while optimal design methods, for overhead high voltage transmission lines, with main objective the minimization of the line total annual cost, considering the relevant technical constraints and both fixed and running cost items have been presented [4]. Finally the economical aspects of the overhead distribution line lightning performance, taking into account customer and utility costs of line outages, have been analyzed [5] and alternative design procedures for uncompensated overhead transmission lines based on the derivation of closed-form analytical expressions for both line power and current ratings, in terms of the geometrical data of the line tower and its bundled conductors were introduced [6].…”