High-Voltage Power Transmission Systems

The paper presents methods for mitigating subsynchronous interaction (SSI) between doubly fed induction generator (DFIG) based wind farms and series capacitor compensated transmission systems. SSI damping is achieved by introducing a supplemental control signal in the reactive power control loop of the grid side conve…

• ULAŞ KARAAĞAÇ

The large number of switching elements in the modular multilevel converter (MMC) is a challenging problem when modeling the MMC-HVDC systems for the computation of electromagnetic transients. The modeling complexity increases even further when a multiterminal (MT) MMC-HVDC system is used to integrate offshore wind far…

• ULAŞ KARAAĞAÇ

A new solution methodology for the constant matrix, decoupled power flow problem is presented in this paper. The proposed method uses the conjugate gradient method instead of the traditional direct solution of Ax=b for updating the power flow variables. The conjugate gradient method is accelerated with an approximate…

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• MEHMET TÜMAY
• RAHMİ İLKER KAYAALP

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• MEHMET TÜMAY
• SELVA BAL
• TUĞÇE DEMİRDELEN

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• KÜRŞAT AYAN

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• ULAŞ KILIÇ

Given the rapid increase in the number of phasor measurement units (PMU) installed in substations in recent years, it is not unrealistic to assume that most transmission systems will be fully observable by only PMU measurements in the not so distant future. Such a scenario will enable faster and numerically easier sta…

• MURAT GÖL

This paper proposes a startup sequence for a modular multilevel converter (MMC) HVDC-connected offshore wind farm (OWF) and demonstrates how it can be simulated using an electromagnetic transient-type tool. The objective is to analyze inrush currents of transformers and cables (HVAC and HVDC). Modeling accuracies and…

• ULAŞ KARAAĞAÇ

This study presents the status of and prospects for the current state of small hydropower technologies used to produce electricity and assesses their future prospects. The hydropower currently provides about 20% of the world's electricity supply and more than 40% of the electricity used in developing countries. Norway…

• RECEP BAKIŞ

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• AHMET METE VURAL

This study assesses the feasibility of the Henry gas solubility optimization (HGSO), a recent novel metaheuristic algorithm, to achieve optimal parameters for a power system stabilizer (PSS) employed in a power system. To do so, the design problem was defined as an optimization problem and an integral of time-multipli…

• DAVUT İZCİ