Experimental analysis of stability and power limitations

A method of determining the power limit of a transmission system taking into account the characteristics of the synchronous condensers and load in conjunction with those of the transmission line is described. The power limit of a transmission system divided into two sections by an intermediate synchronous condenser station is determined and compared that of the same system without the condenser station at the mid-point. The theory was checked by shop tests on in artificial transmission system of sufficient capacity so that accurate results could be obtained. Tests were also made on voltage stability, hunting and the effect of short circuits causing the system to pull out of synchronism.