A study of adaptive zero - sequence current protection 自适应零序电流保护的研究
In this thesis , we study the exponents of convergence of the zero - sequence and the hyper - order of solutions of linear differential equations 本文研究了线性微分方程解的零点收敛指数和超级。
Under some conditions , we obtain the precise estimates of the orders of growth and of the exponents of convergence of the zero - sequence of the solutions of the above equations 在一定的条件下,得到了上述方程解的增长级与零点收敛指数的精确估计。
In chapter 2 , we investigate the problem on the orders of growth and the convergences of the zero - sequence of the solutions of second linear differential equations with entire coefficients to the functions with smaller order of growth 其中第二章研究了二阶整函数系数线性微分方程的解取慢增长函数时的增长级与零点收敛的问题;第三章研究了一类高阶亚纯系数线性微分方程解的超级。
Main functions : 3 - stage complex - voltage blocked overcurrent protection , 3 - stage zero - sequence overcurrent protection , clearance discharging zero - sequence overcurrent protection , zero - sequence overvoltage protection , overvoltage alarming , overload alarming , fan start stop , tap changer blocking , pt wire broken blocking and alarming , etc 其保护配置:复合电压闭锁过流段保护,零序过流段保护,间隙放电零序过流保护,零序过压保护。