说明：  电力系统专业往往要涉及到故障数据处理，也就是解析COMTRADE格式的的数据文件.此代码完成读取COMTRADE格式文件的功能(matlab中)
(Professionals often have to power system fault data relating to treatment, that is, analyticc COMTRADE format data files. This code completion read COMTRADE format files (matlab Medium) )