Adaptive protection for series compensated EHV transmission systems using neural networks

A series compensation technique has been employed to improve power transfer in long-distance transmission systems world-wide. However, this in turn introduces problems in conventional distance protection. The complex variation of line impedance is accentuated as the capacitor´s own protection equipment operates randomly under fault conditions. This paper proposes a novel adaptive protection scheme for a series compensated transmission system by using a neural network approach.