Blar i Publikasjoner fra CRIStin - NTNU på forfatter "Taffese, Abel Assegid"
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A control scheme for utilizing energy storage of the modular multilevel converter for power oscillation damping
Taffese, Abel Assegid; Tedeschi, Elisabetta; de Jong, Erik (Chapter, 2017)This paper presents a control scheme that utilizes energy storage of the Modular Multilevel Converter (MMC) for Power Oscillation Damping (POD) service. Such a service is used to enhance grid stability by providing damping ... -
Arm Voltage Estimation Method for Compensated Modulation of Modular Multilevel Converters
Taffese, Abel Assegid; Tedeschi, Elisabetta; de Jong, Erik (Chapter, 2017)The Modular Multilevel Converter (MMC), being a complex system, requires a number of controllers to function properly. These range from low level switching pattern generation to high level control loops. Among these ... -
Coordination of Modular Multilevel Converter Based HVDC Terminals for Ancillary Services
Taffese, Abel Assegid; Tedeschi, Elisabetta (Chapter, 2018)This paper deals with the utilization of the energy storage capacity, inherently present in the Modular Multilevel Converter (MMC), in providing ancillary services to ac grids. The service considered in this paper is Power ... -
Harmonic Resonance Mode Analysis in dq Domain
Taffese, Abel Assegid; Tedeschi, Elisabetta (Journal article, 2017)Harmonic Resonance Mode Analysis (HRMA) is a technique developed to study harmonic resonance in a power system. Compared to conventional resonance analysis techniques, HRMA is a powerful method that can indicate the origin ... -
Modelling of DC-DC converters based on front-to-front connected MMC for small signal studies
Taffese, Abel Assegid; Tedeschi, Elisabetta; de Jong, Erik (Chapter, 2016)The Multi-terminal DC grid is expected to be built incrementally by interconnecting existing HVDC installations. In doing so, an enabling component is the DC-DC converter which also plays the role of a power flow controller. ... -
Online Parameter Adjustment Method for Arm Voltage Estimation of the Modular Multilevel Converter
Taffese, Abel Assegid; de Jong, Erik; D'Arco, Salvatore; Tedeschi, Elisabetta (Journal article; Peer reviewed, 2019)The method used to calculate insertion indexes plays an important role in determining the overall performance of the Modular Multilevel Converter (MMC). Direct voltage control, which is the simplest option, results in a ... -
Performance evaluation of the empirical method for online detection of power oscillations: a multiterminal HVDC application
Sanchez Acevedo, Santiago; Duong, Dinh Thuc; Taffese, Abel Assegid; Uhlen, Kjetil; Tedeschi, Elisabetta (Chapter, 2018)This paper presents the performance evaluation of an empirical method for online detection of power and voltage oscillations electric grids and is used as a monitoring system to evaluate the grid performance. Additionally, ... -
Power oscillation damping with virtual capacitance support from modular multilevel converters
Taffese, Abel Assegid; Endegnanew, Atsede Gualu; D'Arco, Salvatore; Tedeschi, Elisabetta (Journal article; Peer reviewed, 2019)Power oscillation damping (POD) is one of the ancillary services expected from high-voltage direct current (HVDC) converters. When providing POD to the ac side, converters draw power from the dc side, which can cause ... -
Simplified Modelling of the F2F MMC-Based High Power DC-DC Converter Including the Effect of Circulating Current Dynamics
Taffese, Abel Assegid; Tedeschi, Elisabetta (Chapter, 2018)The Front-to-Front Modular Multilevel Converter (MMC) is one of the topologies being considered for high-voltage, high-power, dc-dc conversion. Hence, there is a need for the development of simplified models for such a ...