Dynamic Behavior Analysis of Open-circuit Transition Wye-Delta Starter
نویسندگان
چکیده
منابع مشابه
More Forbidden Minors for Wye-Delta-Wye Reducibility
A graph is Y ∆Y reducible if it can be reduced to isolated vertices by a sequence of series-parallel reductions and Y ∆Y transformations. It is still an open problem to characterize Y ∆Y reducible graphs in terms of a finite set of forbidden minors. We obtain a characterization of such forbidden minors that can be written as clique k-sums for k = 1, 2, 3. As a result we show constructively that...
متن کاملThe Delta - Wye Approximation Procedurefor Two - terminal
The Delta-Wye Approximation Procedure (DWAP) is a procedure for estimating the two-terminal reliability of an undirected planar network G = (V; E) by reducing the network to a single edge via a sequence of local graph transformations. It combines the probability equations of Lehman | whose solutions provide bounds and approximations of two-terminal reliability for the individual transformations...
متن کاملFour-terminal reducibility and projective-planar wye-delta-wye-reducible graphs
A graph is Y Y-reducible if it can be reduced to a vertex by a sequence of series-parallel reductions and Y Y-transformations. Terminals are distinguished vertices which cannot be deleted by reductions and transformations. In this paper we show that four-terminal planar graphs are Y Y-reducible when at least three of the vertices lie on the same face. Using this result we characterize Y Y-reduc...
متن کاملOn terminal delta-wye reducibility of planar graphs
A graph is terminal ∆ − Y -reducible if, it can be reduced to a distinguished set of terminal vertices by a sequence of series-parallel reductions and ∆−Y -transformations. Terminal vertices (o terminals for short) cannot be deleted by reductions and transformations. Reducibility of terminal graphs is very difficult and in general not possible for graphs with more than three terminals (even pla...
متن کاملPhase Current Differential Protection for Transformers in Wye-delta Mode
For the current transformers (CTs) on the delta side measure the line current instead of the phase current, line current differential protection is adopted in transformers connected in wye-delta mode currently. However, the symmetry feature of inrush current in line current differential protection may invalidate the inrush current restrained criterion. A calculating method of current through de...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Sciences
سال: 2003
ISSN: 1812-5654
DOI: 10.3923/jas.2003.579.586