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Databases : Sciencedirect ✕Department : Elektrik-Elektronik ... ✕
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Fast harmonic analysis for PHIL experiments with decentralized real-time controllers

Özgül SALOR-DURNA

This paper proposes and implements, a harmonic analysis technique used in microgrids for inverter power control when measured voltage and current signals are passed over a communication link with considerable latency. Using frequency-shifting and filtering techniques, the measurement is converted to magnitude and phase information and passed over an asynchronous communication link to another controller, where the original waveform is recovered with delay compensation. The method allows accurate power calculations and grid synchronization over distributed prosumer controllers. The proposed meth ...More

Article 2022 Mühendislik Fakültesi Electric Power Systems Research211 44 Views
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New formalism for characterization of simple non-reciprocal networks free from singularity-point problem

Mehmet ERTUĞRUL

A method has been proposed for accurate characterization of non-reciprocal networks without enforcing the passivity principle. Thanks to the introduced different even and odd coefficients, our method has no singularity-point problem as compared with the conventional method. The proposed method is validated by scattering parameter measurements of a ferrite-loaded waveguide shifter. In addition, it is demonstrated by measurements that our method, as compared with the conventional one, is more resistant to random noise due to post-calibration effects.

Article 2021 Mühendislik Fakültesi Measurement177 64 Views
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Prediction of water-adulteration within honey by air-line de-embedding waveguide measurements

Mehmet ERTUĞRUL

An efficient de-embedding air-line microwave method has been proposed for accurate relative complex permittivity, epsilon(r) = epsilon(r)

Article 2021 Mühendislik Fakültesi Measurement179 110 Views
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Coupling analysis between resonating metamaterial slabs using scattering parameters

Mehmet ERTUĞRUL

Metamaterial (MM) slabs in close proximity can couple with one another. This coupling can modify the electromagnetic response of the overall MM structure involving individual MM resonators. The signal flow graph technique along with the ABCD parameters are applied to quantitatively and qualitatively examine this coupling from simulated/measured scattering parameters of cascade connection of closely or largely separated MM slabs. S-parameter measurements of a MM slab constructed by split-ring-resonators were carried out at X-band (8.2-12.4 GHz) to validate our theoretical analysis.

Article 2021 Mühendislik Fakültesi Measurement182 80 Views
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Power system harmonic and interharmonic estimation using Vortex Search Algorithm

Özgül SALOR-DURNA

In this paper, a vortex search algorithm (VSA) based method designed to estimate power system harmonics and interharmonics for highly time-varying cases is presented. Time-variation in the power system is due to the nonlinear and stochastic loads such as electric arc furnaces (EAF) and it is one of the major cause of the power quality problems. The proposed algorithm is tested on both synthetic signals and also field data obtained from transmission system substations supplying EAF plants. The results are compared with other search algorithm-based methods reported in the literature and shown th ...More

Article 2020 Mühendislik Fakültesi Electric Power Systems Research182 64 Views
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