消除漏电保护死区的新技术及其试验方法

为消除漏电保护死区,提出基于剩余电流变化量法的漏电保护新技术。该技术是通过采用连续移动变化量法和窗口移动变化量法,实现突变漏电电流、持续缓变漏电电流的识别与检测。根据剩余电流、突变漏电电流、持续缓变漏电电流进行漏电综合保护,可以减少漏电保护拒动作。为检验新的漏电保护技术的可靠性和有效性,提出了相应的试验方法。

Technology of eliminating dead zone of leakage current protection and its examining method

A new technology is put forward based on residual current variation and the dead zone of leakage current protection is eliminated. The abrupt change and the slow change of leakage current are identified and detected by the continuous moving variation method and the window moving variation method. The examining method is put forward to verify the reliability and validity of the new technology. This project is supported by National Natural Science Foundation of China (No.50477017).