Rapid Evaluation Method for Modular Converter Topologies

Lanzarotto, Damiano; Morel, Florent; Steckler, Pierre-Baptiste; Vershinin, K.

doi:10.3390/en15103492

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…Nine-level VSC-based STATCOM implements a stable voltage reference point during dynamic load situations with single DC link capacitance [10]. The performance indicator of multi-modular converters has been studied for sizing and economical deviations [11]. One cycle control five-level converter is established for improvement of the power quality in terms of balancing the voltage flickering [12].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy-Based Fifteen-Level VSC for STATCOM Operations with Single DC-Link Voltage

Gadupudi¹,

Rao²,

Divakar³

et al. 2023

Sustainability

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A static synchronous compensator (STATCOM) is a powerful mechanism for balancing reactive power and uplift voltage stability in a transmission system. Nowadays, the desire to save energy by reducing losses is prioritized as an essential target instead of increasing the power generation for the sustainability of any nation’s growth plans. As a result, power-electronics-based converters are more significant for power savings in transmission systems. STATCOM based on voltage source converters (VSC) are operated to improve on stable performance conditions as well as to minimize the harmonic distortions in a power system. Hence, this paper explores low harmonic distortions of fifteen-level VSC structured STACOM using only one DC-link voltage to balance the reactive power and to manage the voltage profile in large power transmission systems. STATCOM consisting of H-bridge type VSCs and binary weighted transformers was utilized to maintain an AC system voltage at 132 kV, 50 Hz. The three stages of VSCs were operated with meticulous firing angles based on converter levels for controlling THD (total harmonic distortion) and providing system improvement. The proposed model of the fifteen-level H-bridge type voltage source converters with fuzzy logic decoupled control algorithm based STATCOM can be used for large power range applications with a small number of switches. This model attained stable operation of the system with a low harmonic deviation at any dynamical conditions. The simulation results using MATLAB showed that the system’s operation was enhanced, with a smoother response and improved steady state performance.

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Section: Introductionmentioning

confidence: 99%

Fuzzy-Based Fifteen-Level VSC for STATCOM Operations with Single DC-Link Voltage

Gadupudi¹,

Rao²,

Divakar³

et al. 2023

Sustainability

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“…This chapter proposes a methodology to compare the dc-dc converters quantitative and qualitatively. The quantitative comparison is made based on key performance indicators (KPI), initially proposed in [106,145]. The qualitatively comparison is based on the possible system requirements or ancillary services that the dc-dc converters can provide.…”

Section: Introductionmentioning

confidence: 99%

Dc-dc converters for HVDC heterogeneous interconnections

Gómez Acero

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(English) High voltage direct current (HVDC) technologies have been used for bulk power transmission over long distances since the 1950s. These technologies have proven to be the most cost-efficient compared to the high voltage alternate current (HVAC) for some applications such as offshore power transmission, connecting remote loads or generation, and the interconnection of non-synchronized grids. In recent years, the study of HVDC grids has been of interest in some research projects but, its development is still uncertain. The de grid can be planned beforehand or it can use the installed lines. But, from the installed HVDC projects, it can be identified different operating voltages, used technologies, and line topologies. There are two HVDC technologies: the line commutated converter (LCC), and the voltage source converter (\/SC). Four different line topologies are identified: asymmetric monopole, symmetric monopole, bipole, and rigid bipole. Developing a de grid interconnecting isolated lines with different characteristics cannot be possible without an intermediary device: the de-de converter. This thesis studies the de-de converters interconnecting HVDC lines with different characteristics. These converters can be seen as the equivalent of ac transformers in de applications because they are capable to adapt the voltage difference between two de systems. These converters are also capable to adapt the line topology and differenttechnologies. The power electronics required for these de-de converters provide increased control flexibility used to supply additional ancillary services that the classical transformers cannot furnish. Three de-de converter topologies are modeled and simulated for the interconnection between a bipole and a symmetric monopole. The front-to-front modular multi-level converter (F2F-MMC) is chosen as the reference because it represents state of-the-art technology. The second converter is the de-de MMC (de-MMC) because of the topological similarityto the MMC. Then, a third converter is proposed and studied as a result of this thesis, the asymmetric de-de converter (ADCC). A set of simulations are performed for multiple operating points and faults scenarios. Then, the converters are compared quantitatively and qualitatively. The results and analysis are used to conclude and bring some perspectives for future works. (Español) as transmision en corriente continua a alta tension (HVDC-por sus siglas en ingles) se han utilizado para la transmision de grandes cantidades de energfa a largas distancias desde la decada de 1950. Estas tecnologfas han demostrado ser las mas rentables en comparacion con la corriente alterna de alta tension (HVAC) para algunas aplicaciones como la transmision de energfa en alta mar, la conexion de cargas o generacion remotas y la interconexion de redes no sincronizadas. En los ultimos aiios, el estudio de las redes HVDC ha sido de interes en algunos proyectos de investigacion, pero su desarrollo aun es incierto. La red de de se puede planificar de antemano o puede utilizar las lfneas instaladas. Pero, a partir de los proyectos HVDC instalados, se pueden identificar diferentes voltajes de operacion, tecnologfas utilizadas ytopologfas de lfnea. Hay dos tecnologfas HVDC: el convertidor de lfnea conmutada (LCC) y el convertidor de fuente de voltaje (VSC). Se identifican cuatro topologfas de lfnea diferentes: monopolo asimetrico, monopolo simetrico, bipolo y bipolo rfgido. El desarrollo de una red de de que interconecte lfneas aisladas de diferentes caracterfsticas no es posible sin un dispositivo intermediario: el convertidor de-de. Esta tesis estudia los convertidores de-de interconectando lfneas HVDC de diferentes caracteristicas. Estos convertidores pueden verse como el equivalente de los transform adores de ac en aplicaciones de de porque son capaces de adaptar la diferencia de tension entre dos sistemas de de. Pero, estos convertidores tambien son capaces de adaptar la topologia de linea ydiferentes tecnologias. La electronica de potencia necesaria para estos convertidores de-de proporciona una mayor flexibilidad de control que se utiliza para proporcionar servicios auxiliares adicionales que los transform adores clasicos no pueden proporcionar. Se modelan y simulan tres topologias de convertidores de-de para la interconexion entre un bipolo y un monopolo simetrico. El convertidor multinivel modular de frente a frente (F2F-MMC) se elige como referencia porque representa tecnologia de punta. El segundo convertidor es el MMC de-de (de-MMC) debido a la similitud topologica con el MMC. Luego, se propone y estudia un tercer convertidor como resultado de esta tesis, el convertidor asimetrico de-de (ADCC). Se realiza un conjunto de simulaciones para multiples puntos de operacion yescenarios de fallas. Luego, los convertidores se comparan cuantitativa y cualitativamente. Los resultados y el analisis se utilizan para concluir y aportar algunas perspectivas para trabajos futuros.

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