Control of multiple power inverters for more electronics power systems: A review

Guo, Xiaoqiang; Chen, Weijian

doi:10.30941/cestems.2018.00032

Cited by 20 publications

(13 citation statements)

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“…Uninterruptible Power Supplies (UPS) are used to feed a wide range of electrical loads: from low-power applications (such as domestic computers and networks) to high-power applications of several Megawatt (such as data centers and medical facilities). Over the years, with the emergence of high-power, more important and sensitive critical loads, two main reasons have motivated the connection of UPS systems in parallel: power capacity expansion and improved redundancy [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Control strategies that ensure equal load current distribution between paralleled UPS systems have been proposed in the literature. According to [1,2], these strategies can be divided into two distinct groups, depending on the presence of intercommunication between the paralleled UPS controllers (Figure 1). If the controllers of each UPS share information, the control scheme is defined as active load-sharing scheme.…”

Section: Introductionmentioning

confidence: 99%

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Finite Control Set Model Predictive Control for Paralleled Uninterruptible Power Supplies

et al. 2020

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Nowadays, uninterruptible power supplies (UPS) play an important role in feeding critical loads in the electric power systems such as data centers or large communication hubs. Due to the increasing power of these loads and frequent need for expansion or redundancy, UPS systems are frequently connected in parallel. However, when UPS systems are parallel-connected, two fundamental requirements must be verified: potential circulating currents between the systems must be eliminated and the load power must be distributed between the systems according to UPS systems availability. Moreover, a high-quality load voltage waveform must be permanently ensured. In this paper innovative control strategies are proposed for paralleled UPS systems based on Finite Control Set Model Predictive Control (FCS-MPC). The proposed strategies simultaneously provide: controlled load power distribution, circulating current suppression and a high-quality load voltage waveform. A new dynamic converters deactivation mechanism is proposed. This new technique provides improved overall system efficiency and reduced power switches stress. In this paper, two multilevel based UPS systems are parallel-connected. Each UPS contains two three-level Neutral Point-Clamped-Converters (3LNPC) and a three-level DC-DC converter. The presented experimental results demonstrate the effectiveness of the proposed control strategies in several operating conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite Control Set Model Predictive Control for Paralleled Uninterruptible Power Supplies

et al. 2020

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“…В зависимости от ряда факторов, таких как взаимного расположения точек подключения включенных в параллель ПП к распределительной сети, закона управления полупроводниковыми ключами, разбросов электрических параметров элементов ПП и других, между параллельно включенными ПП появляются циркуляционные токи, негативно влияющие на КПД системы. Существует ряд способов снижения циркуляционных токов [14]. При этом достаточно эффективным решением, приводящим к снижению циркуляционных токов, является выравнивание мгновенных напряжений на включенных параллельно выходах ПП.…”

Section: Introductionunclassified

The Space Vector Pulse Width Modulation for Reducing the Circulating Currents in Three-Level Con-verters Connected in Parallel

2020

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“…These converters exist in different implementations such as renewable energy integration, custom power devices, industrial and home appliances in different power ranges [1,2]. In order to convert dc power into ac power, traditional inverters cause high switching losses, electromagnetic interferences and high total harmonic distortion (THD) [3][4][5]. An alternative solution is the utilization of multilevel inverter to minimize the disadvantages of conventional inverters [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of T-type Inverter Based on Improved Hysteresis Current Controller

İnci

2019

Balkan Journal of Electrical and Computer Engineering

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This paper presents an improved hysteresis current control method for five level T-type inverter. The proposed method is based on four hysteresis levels and performed to generate switching signals of fundamental transistors in T-type inverter. By using generated signals through hysteresis controller, bidirectional switch in T-type inverter is triggered through the logical way. The system is detailed in analytical expression and exhibited to generate five voltage levels at the output of inverter. The improved technique is based on an error signal between the output current and the reference value. Therefore, the proposed modulation technique achieves the following output current at the desired value and ensures highefficiency conversion ratio at the output. In order to show the validity of the proposed method, the controller is compared with conventional sinusoidal pulse width modulated T-type inverter.In performance results, it is obvious that the proposed method provides a lower total harmonic distortion in comparison with conventional method.

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Control of multiple power inverters for more electronics power systems: A review

Cited by 20 publications

References 0 publications

Finite Control Set Model Predictive Control for Paralleled Uninterruptible Power Supplies

Finite Control Set Model Predictive Control for Paralleled Uninterruptible Power Supplies

The Space Vector Pulse Width Modulation for Reducing the Circulating Currents in Three-Level Con-verters Connected in Parallel

Performance Analysis of T-type Inverter Based on Improved Hysteresis Current Controller

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