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Sardari, H., Mozafari, B., Shayanfar, H. A.. (1401). Fast DC Offset Removal for Accurate Phasor Estimation using Half-Cycle Data Window. فناوری آموزش, 10(2), 341-350. doi: 10.22061/jecei.2021.8205.492
H. Sardari; B. Mozafari; H. A. Shayanfar. "Fast DC Offset Removal for Accurate Phasor Estimation using Half-Cycle Data Window". فناوری آموزش, 10, 2, 1401, 341-350. doi: 10.22061/jecei.2021.8205.492
Sardari, H., Mozafari, B., Shayanfar, H. A.. (1401). 'Fast DC Offset Removal for Accurate Phasor Estimation using Half-Cycle Data Window', فناوری آموزش, 10(2), pp. 341-350. doi: 10.22061/jecei.2021.8205.492
Sardari, H., Mozafari, B., Shayanfar, H. A.. Fast DC Offset Removal for Accurate Phasor Estimation using Half-Cycle Data Window. فناوری آموزش, 1401; 10(2): 341-350. doi: 10.22061/jecei.2021.8205.492

Fast DC Offset Removal for Accurate Phasor Estimation using Half-Cycle Data Window

Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 7، دوره 10، شماره 2، مهر 2022، صفحه 341-350    اصل مقاله (1.04 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2021.8205.492
نویسندگان
H. Sardari1؛ B. Mozafari* 1؛ H. A. Shayanfar2
1Department of Electrical and Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
تاریخ دریافت: 12 شهریور 1400،  تاریخ بازنگری: 20 آبان 1400،  تاریخ پذیرش: 29 آذر 1400 
چکیده
Background and Objectives: Current and voltage signals' distortion caused by the fault in the power system has negative effects upon the operation of the protective devices. One of the influencing factors is the existence of the exponential DC which can significantly distort the signals and lead to a possible malfunction of the protective devices, especially distance and over-current relays. The main problem is the lack of clarity about this component due to the dependence of its time constant and initial amplitude to the configuration of the electrical grid, location and resistance of faulty point. This makes it hard to extract the main frequency phasors of the voltage and current.
Methods: Considering the importance of a fast clearance of the fault, this paper offers a method for an effective and fast removal of the decaying-DC that employs a data window with a length that is equal to the half cycle of the main frequency, while the conventional methods mostly use data from one cycle or even more. The proposed method is based upon the extraction of the decaying-DC component's parameters.
Results: The efficiency of this method is compared to the conventional Fourier algorithm of Half-Cycle (HCFA) and the mimic filter plus the HCFA.
Conclusion: The outcomes display that the proposed method presents a better efficiency from the point of view of the speed and the accuracy of convergence to the final results.
کلیدواژه‌ها
Phasor Estimation؛ Digital filter؛ Half-Cycle Fourier algorithm؛ Mimic filter؛ Exponential decaying-DC component
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