基于PSCAD／EMTDC的距离保护仿真分析

在现代电力系统输电线路中,广泛使用了距离保护。文章简述了距离保护的基本原理,并通过PSCAD／EMTDC软件对距离保护在双电源模型中进行了仿真,得出了距离保护的一些特点,对距离保护的应用具有一定的借鉴和指导意义。     

基于PSCAD仿真的DSTATCOM无功补偿研究

本文采用电磁暂态仿真软件包PSCAD/EMTDC来对DSTATCOM的无功补偿效果进行仿真研究,根据仿真结果来验证DSTATCOM无功补偿的有效性.     

Profitable credit card business empirical analysis of factors

Since 1995, major domestic commercial banks are beginning to have a variety of credit cards issued. However, at present, China＇s relatively low profitability of the credit card business, it accounts for a smaller proportion of total bank income. By means of credit card revenue／cost structure analysis, the authors found spending and overdraft balances affecting credit card business, an important factor in profitability. At the same time, combined with a commercial bank＇s existing statistical data, using SPSS software correlation and regression analysis, the authors found that the key to improve the bank card revenue is to raise China＇s commercial banks, credit card revolving credit utilization, and expand the scale of overdraft balances.