Hybrid Four-wire Three-Level Inverter Equipped with Model Predictive Control for UPS Applications

Shahparasti, Mahdi; Heydari, Rasool; Savaghebi, Mehdi; Rodríguez, José; Blaabjerg, Frede

doi:10.1109/compel49091.2020.9265794

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…For the implementation of both control strategies, cascaded voltage and current loops are mainly utilized in which the voltage controller in charge to track the reference of voltage and the current controller is used to improve system stability and protection. A variety of controllers such as classic proportional-integral (PI) and proportional resonant (PR) controllers as well as nonlinear controllers including deadbeat [10], sliding mode [11] and model predictive controllers [12] have been proposed as voltage and current controllers. Nonlinear controllers are either still highly dependent on the correctness of the parameters or safer from the chattering problem.…”

Section: Introductionmentioning

confidence: 99%

Inrush Current Management During Medium Voltage Microgrid Black Start With Battery Energy Storage System

et al. 2022

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This paper addresses the black start of medium voltage distribution networks (MV-DNs) by a battery energy storage system (BESS). The BESS consists of a two-level voltage source inverter interfacing MV-DN which has limited overcurrent capability. On the other hand, MV-DN normally includes several step-up and step-down transformers that are drawing sympathetic inrush current in energizing stage. Therefore, the major difficulty to perform black start by BESS during MV-DN island operation lies in the fact that the inverter has to simultaneous control the network voltage and its output current. This paper presents two control approaches for a BESS in order to control the inrush current during MV-DN black start. The proposed control schemes consist of droop, voltage and current loops in the stationary reference frame. The droop loop is used to generate the voltage reference. An intermediate voltage and inner current loops are designed for output voltage regulation, current reference generation as well as current tracking, respectively. New reference modifiers are included into droop and voltage loops to limit inrush current. The proposed control schemes are experimentally tested for energizing Ingå MV-DN in Finland by 1 MVA BESS, and their performance is compared in terms of inrush current value and voltage quality. The obtained results prove that both methods are able to feed the load with a fixed voltage in the steady-state as well as to limit the transformer inrush current considering the inverter overcurrent limit.

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Section: Introductionmentioning

confidence: 99%

Inrush Current Management During Medium Voltage Microgrid Black Start With Battery Energy Storage System

et al. 2022

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“…To address the shortcomings, four vectors, including a small vector, are used to synthesize the reference voltage, as follows. When V np is lower than zero, small Ptype vectors V 1P , V 7 , V 13 , and V 0 are used, but when V np is larger than zero, small N-type vectors V 2N , V 7 , V 13 , and V 0 are used. It should be noted that the fixed vector type is beneficial to the switching design of a buck module with only two switching transactions within a switching period.…”

Section: Npv Balancementioning

confidence: 99%

“…Compared with the four common three-level inverters, a reduced switch counts three-level neutral point clamped (RSC-3LNPC) inverter uses only ten transistors with anti-parallel connected diodes to achieve three-phase three-level outputs [11][12][13]. The reduced switch counts topology achieves the size, weight and installation costs reduction.…”

Section: Introductionmentioning

confidence: 99%

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The switching decomposition pulse width modulation with reduced common mode voltage for reduced switch counts neutral point clamped inverter

Jing

Xing

et al. 2022

IET Power Electronics

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Compared with a conventional three‐levelconverter, a reduced switch counts three‐level neutral point clamped (RSC‐3LNPC) inverter uses only 10 switching devices to achieve three‐leveloutput at a lower cost. However, in the RSC‐3LNPC inverter, the common modevoltage (CMV) reduction and neutral point voltage (NPV) balance are mutuallycoupled, and the buck switching module eliminates medium vectors, making conventional modulation methods no longer applicable. To address this problem, this paperdevelops a generation mechanism of the voltage and switching vectors for RSC‐3LNPC inverter and proposes a switching decomposition pulse width modulation (SDPWM) scheme. First, a virtual medium vector with two large vectors having the samedwell time is introduced. Then, the small and zero vectors with low CMV, along with the large and virtual medium vectors, are adopted, and by adjusting their dwell time, the NPV is balanced while reducing CMV. In addition, to reduce computational burden, the switching vector isdecomposed into a buck switching vector and a two‐level switching vector. Both switching vector sequences with transformed duty cycles are carefully designed to achieve only three switching transactions per switching period. Finally, validation and correctness of the proposed SDPWM scheme for RSC‐3LNPC inverterare verified by simulation and experiments.

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A New Space Vector Modulation Technique for a Hybrid 2/3-Level Inverter with Minimized Switching Losses

2022

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Hybrid Four-wire Three-Level Inverter Equipped with Model Predictive Control for UPS Applications

Cited by 10 publications

References 22 publications

Inrush Current Management During Medium Voltage Microgrid Black Start With Battery Energy Storage System

Inrush Current Management During Medium Voltage Microgrid Black Start With Battery Energy Storage System

The switching decomposition pulse width modulation with reduced common mode voltage for reduced switch counts neutral point clamped inverter

A New Space Vector Modulation Technique for a Hybrid 2/3-Level Inverter with Minimized Switching Losses

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