TRANSIENT STABILITY IMPROVEMENT OF EHV POWER TRANSMISSIONS BY ADAPTIVE SINGLE-POLE RECLOSING

Abstract

Some special aspects of the stability properties of EHV power transmissions are pointed out in the introduction, followed by a more detailed analysis of the impact of single-pole short circuits and automatic reclosing. Digital investigation results are described, on ground of which critical reclosing dead-time values are established in function of the pretransient power transfer and other relevant parameters. The advantages of adaptive single-pole reclosing method are stressed for increasing the chances of preserving synchronism, and "probability of transient stability" values calculated, which clearly show the favorable effects of said method on the transient stability levels of EHV transmissions.