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Shetgaonkar, A.D. (author), Liu, L. (author), Lekic, A. (author), Popov, M. (author), Palensky, P. (author)Meshed offshore grids (MOGs) present a viable option for a reliable bulk power transmission topology. The station-level control of MOGs requires faster dynamics along with multiple objective functions, which is realized by the model predictive control (MPC). This paper provides control, and protection design for the Modular Multilevel...journal article 2023
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Liu, L. (author), Shetgaonkar, A.D. (author), Lekic, A. (author)This paper presents the modular-multilevel-converter (MMC) control interoperability (IOP) and interaction within the High Voltage Direct Current (HVDC)-based power system. IOP is a crucial issue in the large-scale HVDC grid with different suppliers. To accommodate future multi-vendor HVDC grids developments, this article comprehensively...journal article 2023
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van der Sande, Robin (author)With the increasing appearance of DC loads and DC sources in the MVAC distribution grids, the need for DC power systems is getting more and more pronounced. As a result, the MMC has become a promising and innovative technology that can serve as the interface between a DC and AC network. The MMC-based MVDC distribution link is one of the...master thesis 2022
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Giannakopoulos, G. (author), Perilla Guerra, A.D. (author), Rueda, José L. (author), Palensky, P. (author)Power electronic dominated power systems formed nowadays are characterized by fast and frequent dynamics, limited short circuit support, low inertia conditions and lack of inertial support. Under these conditions, coping with active power imbalances in a power system may becomes a significant challenge for transmission system operators (TSOs)...conference paper 2022
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Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)Power electronics converters will play a crucial role in power grid expansion. Superior advantages offered by MMC make it the most popular candidate amongst various converter topologies. However, due to a large number of components installed within MMC, reliability analysis is an unavoidable task that needs to be carried out to maximize the MMC...conference paper 2022
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Liu, L. (author), Lekic, A. (author), Popov, M. (author)Due to its excellent performance, VSC-based high voltage direct current (HVDC) power systems draw significant attention. They are being heavily used in modern industrial applications, such as onshore and offshore wind farms, and for interconnection between asynchronous networks. However, the traditional proportional-integral (PI) control...conference paper 2022
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Zang, Y. (author), Ghaffarian Niasar, M. (author), Ganeshpure, D.A. (author), Qian, Yong (author), Sheng, Gehao (author), Jiang, Xiuchen (author), Vaessen, P.T.M. (author)With the widespread application of power electronic switching technology, power equipment is facing new electrical stresses brought about by multilevel staircase voltages during testing and operation. Therefore, the partial discharge (PD) behavior of five typical defects in power equipment under the staircase waveform needs to be investigated...journal article 2022
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Argiz, Lucía (author), Correa-Galeote, David (author), Val del Río, Ángeles (author), Mosquera-Corral, Anuska (author), Gonzalez Cabaleiro, R. (author)The lipid fraction of the effluents generated in several food-processing activities can be transformed into polyhydroxyalkanoates (PHAs) and triacylglycerides (TAGs), through open culture biotechnologies. Although competition between storing and non-storing populations in mixed microbial cultures (MMCs) has been widely studied, the right...journal article 2022
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Marchand, Jane (author)Given the urgency to shift to a cleaner energy mix, offshore wind energy is bound to be quickly deployed on a large scale in the next years. In order to meet the Paris Agreement, the current role-out rate of wind energy in the North Sea, that is 2 GW/year, needs to be increased to an average value of 7 GW/year over the period 2023-2040. This...master thesis 2021
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Giannakopoulos, George (author)Power systems nowadays are experiencing a significant energy transition characterized by the progressive increment of power electronic interfaced units. Voltage source converters are extensively utilized to interconnect renewable energy sources at various transmission levels, facilitate the asynchronous interconnection of system areas through...master thesis 2021
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Ganeshpure, D.A. (author), Soeiro, Thiago B. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author), Bauer, P. (author)This paper comprehensivelyinvestigates the design trade-offs of a Modular Multilevel Converter (MMC) operations as an Arbitrary Wave shapesGenerator (AWG) to perform High Voltage (HV) dielectric testing of different grid assets. HV AWG applications pose unique operatingconditions to the MMC, which influences the selection of the various...journal article 2021
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Ganeshpure, D.A. (author), Castro Heredia, L.C. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author), Soeiro, Thiago B. (author), Bauer, P. (author)This paper presents a comparison in Partial Discharge (PD) behaviour when an air corona setup is subjected to different waveforms, namely an idealized 50 Hz sinusoidal and staircase-based sinusoidal waveforms near inception voltage and at a higher voltage. In this study, it has been observed that the PD repetition rate and the Phase-Resolved PD ...conference paper 2021
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Ganesh, Saran (author), Perilla Guerra, A.D. (author), Rueda, José L. (author), Palensky, P. (author), Lekic, A. (author), van der Meijden, M.A.M.M. (author)This paper proposes a Electro-Magnetic Transient (EMT) model of a 2 GW offshore network with the parallel operation of two Modular Multi-level Converter (MMC)—High Voltage Direct Current (HVDC) transmission links connecting four Offshore Wind Farms (OWFs) to two onshore systems, which represent a large scale power system. Additionally, to...journal article 2021
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Ganeshpure, D.A. (author), Soeiro, Thiago B. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author), Bauer, P. (author)This paper analyses different design trade-offs for a Modular Multilevel Converter (MMC)-based Arbitrary Wave shape Generator (AWG) used for High Voltage (HV) testing and certification of grid assets such as transformers, switchgear, and cables. Modulation techniques, number of submodules, output voltage levels, arm inductance, and series...conference paper 2021
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Roose, Thomas (author), Lekic, A. (author), Alam, Mohammad Meraj (author), Beerten, Jef (author)This paper analyzes high-frequency interactions between a Modular Multilevel Converter (MMC) and High Voltage Direct Current (HVDC) grid resonances by studying their effect on the system stability. The recent appearance of converter-related instabilities due to high-frequency oscillations at the converter's ac side raises concerns about whether...journal article 2020
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Kidambi Murali, Pragati (author)Renewable energy resources are the most successful, promising, and economical mode of energy generation. Moreover, wind energy is also one of the victorious candidates in generating renewable energy. Currently, High Voltage Direct Current (HVDC) systems are designed to integrate the energy harvested in the Offshore Wind Farms (OWF) to the grid...master thesis 2020
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Shukla, S. (author)The power system in Northern Europe supports a high degree of penetration of Wind Energy-based HVDC connections. Most of the modern HVDC connections will have Bipole with a dedicated metallic return (DMR) configuration. This thesis presents a basic guideline to increase the Levelized cost of operation of Bipole HVDC links by attaching the...master thesis 2020
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Shekhar, A. (author)Energy transition will inevitably lead to greater electrification. For example, it is anticipated that electrical energy demand will rise by at least 2-3 times by 2050 with increasing share of electric vehicles and heat pumps. This will translate to significant increase in power demand on the existing medium voltage distribution grid, resulting...doctoral thesis 2020
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Liu, Lian (author), Liu, Zhou (author), Popov, M. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)HVDC technologies are widely acknowledged as one of solutions for the interconnection of renewable energy resources with the main electric power grid. The application of the latest modular multi-level converter (MMC) makes power conversion much more efficient. Due to the relatively low impedance in a DC system, DC fault currents may rise to an...journal article 2020
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Lourduraj, Getssy Prathiba (author)There is an increasing demand for compact onsite dielectric test systems of medium and high voltage equipment. Though there are commercially available mobile high voltage (HV) test sources, they have some important drawbacks such as limitation in voltage capability, complexity in building up the test setup and lack of versatility to test...master thesis 2019
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