After analyzing the reasons and characteristics of com m unication data error of current differential protection relay18.acom m unication error correcting m ethod is given to accelerate tripping of relay.

• 分析了通信过程中数据出错的原因和特点，然后给出了根据汉明码纠错原理推出的纵差保护数据通信的纠错方法，借以提高保护的动作速度。