In this paper, the IED(Intelligent Electronic Devices) with the consideration of harmonic problems is discussed. With significant development of power electronics technology, the proliferation of a nonlinear load has more deteriorated power quality. A...
In this paper, the IED(Intelligent Electronic Devices) with the consideration of harmonic problems is discussed. With significant development of power electronics technology, the proliferation of a nonlinear load has more deteriorated power quality. As continuous harmonic current makes for a shortening lifetime, overheat and abnormal operation, it should be considered to improve these problems. However, the conventional digital protective relay which eliminates harmonic elements with orthogonal filter has a defect on actually implementation. The prototype IED is constructed with Digital Signal Processor(TMS320C32) and Complex Programmable Logic Device. According to the experiment and simulation results, it is proved that the proposed system has good performance of measuring harmonic factors and protecting electrical equipment.