Download Soft Computing Techniques in Voltage Security Analysis by Kabir Chakraborty, Abhijit Chakrabarti PDF

By Kabir Chakraborty, Abhijit Chakrabarti

This publication makes a speciality of delicate computing suggestions for boosting voltage safety in electrical energy networks. man made neural networks (ANNs) were selected as a smooth computing device, because such networks are eminently appropriate for the examine of voltage defense. the various architectures of the ANNs utilized in this ebook are chosen at the foundation of clever standards instead of by means of a “brute strength” approach to trial and mistake. the basic goal of this ebook is to give a accomplished treatise on energy method protection and the simulation of energy approach defense. The center strategies are substantiated by way of appropriate illustrations and laptop equipment. The booklet describes analytical points of operation and features of energy structures from the point of view of voltage defense. The textual content is self-contained and thorough. it's meant for senior undergraduate scholars and postgraduate scholars in electric engineering. working towards engineers, electric keep watch over heart (ECC) operators and researchers also will locate the e-book useful.

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Sample text

3. Change the mutual admittance between buses, which include the transformer y by the term − aij instead of−yij. 5 MATLAB Program for Formation of Modified YBus It is observed from the above discussion that due the introduction of a transformer, some of the diagonal and off-diagonal elements are changed, and due to this, the MATLAB program for the formation of Y-bus matrix has to be modified accordingly. This modified MATLAB program is generally used for the formation of complete Y-bus matrix for a general network.

70) + Gij sin δj − δi where Bij = Yij sin ϕij and Gij = Yij cos ϕij. 75) where B′ and B′′ are the imaginary part of the YBus matrix and both are generally symmetrical and sparse with nonzero elements. The elements are constant and they need be triangularized and rearranged just once at the start of the cycle. The order of the matrix B′ is (N − 1) while for B′′ it is (N – 1 − M), but both are real. N being the number of total buses while M is the number of voltage-controlled buses. When there is no phase-shifting transformer, B′ and B′′ are symmetric.

It may be used for even large system to obtain first estimated result, which might be utilized as initial solution for Newton–Raphson method. 5. Less computational time required for each iteration. 6. Small computer memory requirement. 5 Newton–Raphson Method of Power Flow The Newton–Raphson method of load flow analysis is found to be more efficient and practical for large power systems as a result of its quadratic convergence and is less inclined to divergence with ill-conditioned issues. 37) Yij Vj Ii = j=1 where Ii is the current entering into bus i of that multi-bus power network and N is the total number of buses of that system.

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