طراحي و ساخت يك رله جديد براي تشخيص خظاهاي امپدانس بالا بر اساس تبديل موجك

A Novel Approach to High Impedance Faults Detection Using Wavelet Transform; Design and Implementation

This paper presents a new approach for detection of high impedance faults in the Electric power distribution systems using wavelet transform. The proposed method has been implemented on a digital protective relay and its behavior is investigated using appropriate simulation software. Details of the design procedure, implementation and the results of performance studies of the proposed relay are given in this paper. The experiment show that the proposed algorithm performs very well in detecting a high impedance fault with nonlinear arcing resistance. It is clearly shown that the proposed relay is able to accurately distinguish between high impedance faults and other cases such as load and/or capacitance switching.