Implementation of a control strategy for three-phase four-wire VSI parallel connected

Arbugeri, Cesar Augusto; Jappe, Tiago Kommers; Lazzarin, Telles Brunelli; Mussa, Samir Ahmad

doi:10.1109/speedam.2014.6872058

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…In this case, no neutral wire in the UPS systems is required [1][2][3]. However, there are several applications in which both three-phase and single-phase loads need to be supplied [4][5][6]. Hence, for such applications, the used UPS systems must provide a neutral connection at the load-side terminals to feed all possible types of loads.…”

Section: Introductionmentioning

confidence: 99%

Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection

et al. 2021

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Uninterruptible Power Supplies (UPS) have been demonstrated to be the key technology in feeding either single- and three-phase loads in a wide range of critical applications, such as high-tier datacenters and medical facilities. To increase the overall system power capacity and resilience, UPS systems are usually connected in parallel. When UPS systems are parallel connected, a circulating current can rise, inhibiting correct system operation. Moreover, having a controlled load power distribution is another fundamental requirement in paralleled UPS systems. However, strategies to ensure these two topics have not been explored to date for UPS systems with a load-side neutral connection. This paper proposes an innovative Finite Control Set Model Predictive Control (FCS-MPC) strategy that ensures circulating current elimination and controlled load power distribution for paralleled UPS systems that use an additional inverter leg for load neutral point connection. Additionally, a system topology based on two parallel-connected UPS systems that can simultaneously supply single- and three-phase critical loads is proposed. Experimental results show the effectiveness and robustness of the proposed control techniques even when different types of loads are connected to the UPS systems.

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Section: Introductionmentioning

confidence: 99%

Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection

et al. 2021

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Implementation of SHE-PWM Technique for Parallel Voltage Source Inverters Employed in Uninterruptible Power Supplies

Omara

Moschopoulos

2018

2018 IEEE International Telecommunications Energy Conference (INTELEC)

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Estratégia de Paralelismo Baseado no Conceito de Impedância Virtual para Inversores Trifásicos a Quatro Fios

Mussa¹,

Arbugeri²,

Lazzarin³

et al. 2018

Eletrônica de Potência

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The paper proposes a strategy for parallel connection of three-phase inverters, which can be applied in UPS (uninterruptible power supply). The control strategy is based on the virtual impedance concept, with no communication among the inverters. The proposed strategy is highlighted by its easy implementation that is similar to the conventional control of one inverter. The main features of the proposed strategy are modularity, fast dynamic response and good static regulation, even under load disturbances or hot-swap connection of inverters. The digital design implementation of the control strategy is described and experimental verification using two fourwires VSI modules with rated power of 6 kVA each are reported herein.

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Implementation of a control strategy for three-phase four-wire VSI parallel connected

Cited by 3 publications

References 20 publications

Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection

Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection

Implementation of SHE-PWM Technique for Parallel Voltage Source Inverters Employed in Uninterruptible Power Supplies

Estratégia de Paralelismo Baseado no Conceito de Impedância Virtual para Inversores Trifásicos a Quatro Fios

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