Application of Compensation Method in calculating symmetrical short circuit Fault
Based on compensation method, Symmetrical shortcircuit fault current formula and nodal voltage formula are deduced in this paper. In the deduction prosess the time of calculating matrix inversion is eliminated for the nodeadmittance matrix being not modified when the fault occurs, however triangular matrix method is applyed to calculate nodal impedance matrix at the program entrance in the process based on the original network nodal admittance matrix, thus the solution of the electrical network state variables is speed up with preparing data for fault calculation in advance. After further assumptions and simplification, short-circuit current formula is more efficient to estimate the size of short-circuit current, and it is very suitable for real-time online applications. At the same time, current coefficient power contributing which is defferent from power current distribution coefficient is put forward. A optimal node is found for new power supply to limit short-circuit current by judging the size of current coefficient power contributing.
compensation method symmetrical short circuit fault nodal impedance matrix current coefficient power contributing short-circuit current limiting
Yangqing Dan Wenying Liu Yanwei Zhu
Department of Electrical and Electronic Engineering North China Electric Power University Changping,Beijing,China
国际会议
2010 IEEE信息与自动化国际会议(ICIA 2010)
哈尔滨
英文
1-4
2010-06-20（万方平台首次上网日期，不代表论文的发表时间）