Maximum power transfer limited by voltage stability in series and shunt compensated schemes for AC transmission systems

A method of determining the maximum power transfer limit of AC transmission systems from the point of view of voltage stability is described. Five different schemes using series and shunt compensation are studied, and numerical results for maximum power transfer, critical angular separation, and critical voltage are given. Effects of load power factor, line loss, line length, and the degree of series and shunt compensation are considered. Among other findings it is shown that the maximum power transfer increases as the degree of series compensation is increased. The maximum power transfer limit decreases with increases in the value of line-loss factor and line length. The critical angular separation and the critical load-end voltage decrease as the load power factor is changed from leading to lagging