Selection of test nodes for analog fault diagnosis in dictionary approach (2000)
In this paper, the selection of test nodes has been studied extensively and efficient techniques are proposed. Two broad categories of methods called inclusion methods and exclusion methods are...
A new network reconfiguration technique for service restoration in distribution networks (1994)
Sarma, N D R, Prasad, V C, Prakasa Rao, K S, Sankar, V
Whenever a fault occurs in a particular section of a distribution network and on isolation of the fault, some of the loads get disconnected and are left unsupplied. Service should be restored to...
Uniqueness of solutions of networks with two terminal piecewise linear resistors (1994)
For networks containing resistors, independent-sources, gyrators, ideal transformers, diodes and other saturating monotone piecewise linear resistors, a new condition is proposed to guarantee...
Boolean method for selection of minimal set of test nodes for analogue fault dictionary (1993)
A novel method using Boolean algebra is presented to obtain a minimal as well as the smallest set of test nodes in the dictionary approach to analogue fault diagnosis. This reduces the number of...
Equations of the form F(x)=f(x)+Ax=y where f(x)=[f1(x1 ) f2(x2) . . . f n(xn)]T, A is a P 0 matrix and for all i=1,2, . . ., n, fi(xi), are monotonic and piecewise linear but not necessarily strictly...
Mixed integer programming method for fault diagnosis of linear analogue circuits (1992)
Prasad, V C, Pinjala, S N R, Murty, K G
Fault diagnosis of linear analogue circuits can be formulated as a mixed integer programming problem. This avoids testing all possible combinations of submatrices of the equations of the network to...
Generation of vertex and edge cutsets (1992)
Prasad, V C, Sankar, V, Rao, K S Prakasa
An algorithm is proposed to obtain basic minimal paths from basic minimal path tree for a network having a single source vertex and a single sink vertex. This does not require generation of all...
Coordination of directional relays without generating all circuits (1991)
Prasad, V C, Prakaso Rao, K S, Subba Rao, A
A novel method is proposed for obtaining a minimum break point set for computer-aided coordination of directional relays in a power system. This very simple technique uses only fundamental circuits...
Signal delay in linear leaky RC mesh/tree (1991)
Jain, N K, Prasad, V C, Bhattacharyya, A B
As chip dimensions are reduced, the performance of integrated circuits is limited by the delays associated with the interconnections. For the purpose of propagation delay estimation in digital...
Delay time sensitivity in linear RC mesh (1991)
Jain, N K, Prasad, V C, Bhattacharyya, A B
A generalization of delay time sensitivity in leaky linear RC mesh has been established. In an RC mesh, the spatial monotonicity does not hold, as there is no unique path between the source and any...
A cut set approach for HVDC converter reliability evaluation (1991)
Sankar, V, Prasad, V C, Prakasa Rao, K S
The reliability evaluation of HVDC systems has been gaining much significance in the recent past. A new approach for converter equipment failure analysis is proposed. The AC to DC converter equipment...
Equations of nonlinear analogue circuit for fault dictionary generation (1990)
A method for the generation of fault equations of a nonlinear analogue circuit is suggested. It is useful in the context of a fault dictionary. The method is easy to program as it is based on node...
Delay time sensitivity in nonlinear monotone RC trees (1990)
Jain, Navneet K, Prasad, V C, Bhattacharyya, A B
The sensitivity of delay time (time required to achieve a given target voltage) at any node of a nonlinear monotone RC tree is studied using the adjoint-network approach. It is shown that the...
It is shown that the Jacobian determinant being nonzero for all values of its variables is both necessary and sufficient for the uniqueness of solutions of a wide class of networks. These networks...
For an equation of the form F(x)=y, it is shown that there is at least one solution for every y if F is eventually P0 passive or the effective Jacobian matrix in all the unbounded regions is a P...
A method for the generation of a fault dictionary of a linear analog circuit is presented. The method is based on the well-known adjoined network concept. For an (n+1) node network and for an order...
A parallel algorithm for the single-row routing problem without backward moves and interstreet crossings is presented. The algorithm requires O(log N log log N) time with N processors on a...
Homeomorphic piecewise-linear resistive networks (1988)
Homeomorphism of matrix equations of the form f(x)=g(x)+Hx=y, where g is nondiagonal, is studied. It is shown that contrary to common belief, from a practical point of view, the condition that the...