Design And Implementation Of Short-circuit Current Calculation System Based On Depth-first Search

Short-Circuit is the one of common and the most severely fault on the ship power system. After short-circuit, the fault may cause fire, damage to power supplies, causing the whole system can not work. Short-circuit current calculation is an indispensable tool for power system analysis, the choice of electrical equipment and current-carrying conductor, relay protection, the choice of automation devices and the measures of limiting the short-circuit current and so on, They all need the short-circuit current calculation . The traditional short-circuit current calculation software is mostly designed for function-oriented and it is unfriendly, maintenance inconvenient, poor computing capacity shortcomings. In recent years, with the development of computer technology, power system modeling cause the possible of solving more complex power system engineering calculations, based on depth-first traversal algorithm to short-circuit current calculation algorithm is able to provide the combination of graphics and algorithms on electric power system for solving complex problems.To take this opportunity, This thesis with power system graphical modeling as the guiding ideology , in allusion to poor calculation ability and unfriendly interface, put forward the based on depth-first search of the short-circuit current calculation algorithm.This thesis follows the completion of major work:1) The need of power system modeling, using methods of the power system physical devices-oriented for modeling, building the corresponding graph model. Using".NET GDI+"graphics program design techniques and object-oriented programming techniques to achieve a graphical editing capabilities of the power system modeling platform.2) for the characteristics of short-circuit current calculation algorithms and methods, designed to algorithm meeting the complex power system short-circuit current calculation, and established the calculation model to reduce the computational complexity of the power system impedance, and based on the algorithm for system short-circuit current calculation.3) Through the integration of graphics and data, shorten the time of reading the meta-parameter data and improved the computing efficiency.4) The system's implementation, this integrated use of object-oriented programming, graphical modeling and graphics power system traversal algorithm ideas, design a set of graphic editing, parameter input, data integrity checks, quick calculation and other functions as one of the short-circuit current computing systems.