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Loss of excitation (LOE) protection is one of the important generator protection scheme used to detect abnormal operating condition resulting from loss of field voltage. The conventional protection scheme is prone to incorrect operation during stable swings. Several enhancements to the conventional protection scheme are discussed in literature to improve the reliability of LOE protection scheme. This...
The present day power system comprises of extra high voltage network, transmitting power from large generating stations over long distances. The modern day generators are built with higher rating and better cooling techniques, resulting in larger machine impedances. The closely knit transmission network has resulted in decreased system impedance. These changes have increased the chances of occurrence...
Estimating accurate phasor calculations and selection of best fault data window are the basic requirements of any fault location algorithm. This paper highlights the issues with conventional Fourier transform based filtering techniques to compute fundamental components. It also discusses the effect of RDFT on fault location especially in case of short duration faults. The paper introduces an improved...
Power system is constantly evolving with application of new technology to improve the reliability and security of the system. At the same time technology upgradation is being undertaken to reduce the cost of various power system components, which can have an impact on protection techniques. The paper evaluates the performance of loss of excitation protection scheme for increase in generator direct...
This paper aims at evaluating the methods of multiclass support vector machines(SVMs) for effective use in distance relay coordination. Also, it describes a strategy of supportive systems to aid the conventional protection philosophy in combating situations where protection systems have maloperated and/or information is missing and provide selective and secure coordinations. SVMs have considerable...
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