DQ Transform Based Current Controller for Single-Phase Grid Connected Inverter

Jayathilaka, Imanka; Lakpriya, Lushan; Alwis, Damith De; Jayakody, Gayeshi; Hemapala, K.T.M.U.; Karunadasa, J.P.; Lakshika, Himali

doi:10.1109/eecon.2018.8541004

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…Figure 1 depicts the system setup and conventional current control architecture. The conventional method is implemented in a d-q frame and PI controllers are applied [22,23]. To begin, sample the output current i g and set it as i α .…”

Section: System Setup and Conventional Control Methodsmentioning

confidence: 99%

A Current Control Method for Grid-Connected Inverters

Zhang,

Wang,

et al. 2023

Energies

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It is simple to implement conventional current control with a proportional integral (PI) controller. However, system stability and dynamic performance are not perfect, particularly when operating under unfavorable conditions. In this paper, an improved control method is proposed by introducing a compensation unit. The compensation unit can effectively compensate the system’s phase around the crossover frequency, greatly enhancing the system’s phase margin and stability. It is also capable of handling weak-grid conditions. In this paper, the concept of the proposed compensation unit is explained first. Then, the corresponding mathematical model for the current control loop is built, and system bode diagrams for the conventional and proposed methods are compared. Furthermore, the effect of the parameters for the compensation unit is investigated, and an optimization method is proposed to determine optimal parameters. In addition, to handle weak-grid conditions, the proposed scheme is expanded by including the compensation unit in the grid’s feed-forward loop. Finally, an experimental platform is constructed, and the experimental results are presented to validate the proposed method.

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Section: System Setup and Conventional Control Methodsmentioning

confidence: 99%

A Current Control Method for Grid-Connected Inverters

Zhang,

Wang,

et al. 2023

Energies

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“…Donde id * es la referencia de corriente activa y permite la transferencia de potencia activa hacia el bus de cd, lo cual a su vez permite la regulación del voltaje de cd; iq * es la referencia de corriente reactiva que permite compensar potencia reactiva; finalmente, ih * es la componente que permite compensar corrientes armónicas. Las componentes iq * e ih * son obtenidas a través del proceso mostrado en la Figura 2, el cual involucra el uso de la transformada DQ monofásica (Jayathilaka et al, 2018;Shu, Lin, Ziwei, Yin, & Zhou, 2017), denotada en este trabajo como TDQ y que es mostrada en (9). Para la aplicación de TDQ se necesita la corriente demandada por la carga iz y su componente en cuadratura iz90 (señal iz retrasada 90°), estas señales entran a la TDQ, para posteriormente obtener a la salida dos señales denotadas como Idz e Iqz, las cuales representan las componentes de corriente activa y reactiva, respectivamente, que son demandadas por la carga.…”

Section: Modelo Y Control Del Filtro Activo De Potencia Monofásicounclassified

Sintonización del controlador en cascada PI-STA para aplicaciones de filtros activos de potencia

González

Pérez

Beristain

et al. 2020

Rev. iberoam. autom. inform. ind.

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<span lang="ES">Típicamente el esquema de control de un filtro activo de potencia corresponde a un controlador en cascada, el cual consta de un lazo externo para la regulación del voltaje de cd y un lazo interno para el seguimiento de una corriente de referencia. Cada uno de estos lazos de control está asociado a un controlador que permite converger rápidamente a su respectiva referencia. Este trabajo emplea un controlador PI en el lazo externo y el algoritmo Super-Twisting (STA) en el lazo interno, los cuales conforman al controlador en cascada denotado como PI-STA. Este artículo presenta una metodología para sintonizar los controladores PI y STA, donde el primero se sintoniza a partir de la respuesta al escalón, mientras el STA se sintoniza a partir de considerar la similitud de su estructura con respecto a la de un PI, facilitando así la obtención de las ganancias del STA. Para validar la metodología de sintonización, se presentan resultados en simulación y experimentales.</span>

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“…Therefore, it is a necessity to modify existing solar PV MG architectures [10,11,12]. SPVSs and microgrids consist of power electronic interfaces (PEI) which make these systems highly controllable and flexible for modifications [13,14,15]. The reconfigurable power system is one of the proposed concepts to increase the controllability of the existing power system [16,17].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable solar photovoltaic systems: A review

Lakshika

Boralessa

Perera

et al. 2020

Heliyon

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Even though solar power generation has become an emerging trend in the world, its penetration into the utility grid as a distributed generation source is not a satisfactory measure due to the inherent issues related to solar photovoltaic systems (SPVSs). In addressing these issues, microgrids have been identified as suitable integrating platforms for distributed, clean energy resources such as SPV. Different SPV and microgrid architectures are available for different applications depending on the resource availability and controllability. Reconfigurability is a concept that makes a system adaptable to two or more different environments by effectively utilizing the available resources. The review explains the applications of reconfigurable approaches on solar PV systems such as reconfigurable PV arrays, power conditioning unit (DC/DC converter, DC/AC inverter), microgrid controller and topology of distribution network with relevant studies. An analysis is also presented considering the unique features of reconfigurable systems in comparison to the static systems.

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DQ Transform Based Current Controller for Single-Phase Grid Connected Inverter

Cited by 11 publications

References 7 publications

A Current Control Method for Grid-Connected Inverters

A Current Control Method for Grid-Connected Inverters

Sintonización del controlador en cascada PI-STA para aplicaciones de filtros activos de potencia

Reconfigurable solar photovoltaic systems: A review

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