An Optimum Hybrid SVPWM Technique for Three Level Inverter

Nair, Meenu D; Vivek, G.; Barai, Mukti; Biswas, Jayanta

doi:10.1109/i2ct.2018.8529371

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…The principle of the SVPWM is based upon the calculation of the control voltage vector by approximately using three adjacent vectors. In the case of sector I, the average reference voltage vector Vref for conventional two-level inverters is as follows [20,21]:…”

Section: Figure 2 Three-level Inverter Space Vector Diagrammentioning

confidence: 99%

Impact of the Integration of a STATCOM Controlled by LQG/H2 Regulator in an Energy System

Mekki¹,

Boulouiha²,

Allali³

et al. 2021

EJEE

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Nowadays, the reactive power consumption is becoming a serious problem for electricity network management. To overcome this problem, several solutions are proposed in the literature. In the present study, the static reactive power compensator (STATCOM) solution is used to keep the network voltage within its rated range. The STATCOM is modeled in the axes of Park reference frame and is driven controlled by a SVPWM strategy. Its control scheme is based on a multivariable Linear Quadratic Gaussian (LQG/H2) controller, which has the advantage of being applied to systems whose condition is not measured. Simulations are performed using the MATLAB/SIMULINK software. Results are presented, compared and discussed.

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Section: Figure 2 Three-level Inverter Space Vector Diagrammentioning

confidence: 99%

Impact of the Integration of a STATCOM Controlled by LQG/H2 Regulator in an Energy System

Mekki¹,

Boulouiha²,

Allali³

et al. 2021

EJEE

View full text Add to dashboard Cite

show abstract

“…In addition to the abovementioned high-performance techniques applied to improve the operation of the classical DTC, multilevel inverters could reduce the torque and flux ripples, if replacing the standard two-level inverter. Among the multilevel inverter topologies used in DTC drives, the three-level neutral-point clamped (NPC) inverter was the most widely used inverter [25][26][27][28][29][30]. In DTC fed by a three-level NPC inverter (3L-DTC), the selection of the applied voltage vectors was expanded because of employing a higher-level (HTC), which was capable of utilizing all voltage vectors of the three-level NPC inverter; thus, different speeds of stator flux linkage could be achieved to have a predominant control of torque and flux [31][32][33][34][35][36].…”

Section: Mathematical Modelling Of Ipmsmmentioning

confidence: 99%

Four-Level Hysteresis-Based DTC for Torque Capability Improvement of IPMSM Fed by Three-Level NPC Inverter

Hakami

Lee

2020

Electronics

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Direct torque control (DTC) is considered one of the simplest and fastest control strategies used in motor drives. However, it produces large torque and flux ripples. Replacing the conventional two-level hysteresis torque controller (HTC) with a four-level HTC for a three-level neutral-point clamped (NPC) inverter can reduce the torque and flux ripples in interior permanent magnet synchronous motor (IPMSM) drives. However, the torque will not be controlled properly within the upper HTC bands when driving the IPMSM in the medium and high-speed regions. This problem causes the stator current to drop, resulting in poor torque control. To resolve this problem, a simple algorithm based on a torque error average calculation is proposed. Firstly, the proposed algorithm reads the information of the calculated torque and the corresponding torque reference to calculate the torque error. Secondly, the average value of torque error is calculated instantaneously as the reference torque changes. Finally, the average value of the torque error is used to indicate the operation of the proposed algorithm without the need for motor speed information. By using the proposed algorithm, the torque can be controlled well in all speed regions, and thus, a better stator current waveform can be obtained. Simulation and experimental results validate the effectiveness of the proposed method.

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“…high-voltage large-capacity power conversion systems than two-level VSIs [9], [10]. T-type NPC inverters employ an active bidirectional switch at the DC-link neutral point [11].…”

Section: Introductionmentioning

confidence: 99%

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

Kim

Lee

2020

IEEE Access

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In this paper, an optimized space-vector modulation (SVM) to reduce DC-link ripple current in three-level inverters is presented. Various types of capacitors can be utilized to balance the voltage in the DC-link of voltage source inverters. Electrolytic capacitors are widely used owing to their large capacitance per volume. However, electrolytic capacitors have a short lifespan because the allowable ripple current is low. A conventional SVM that is focused on improving harmonic characteristics. Therefore, it cannot balance the DC-link ripple current properly because using some voltage vectors increases the DC-link ripple current. To overcome this limitation and extend the lifespan of the capacitors, an optimized SVM is proposed to reduce the DC-link ripple current. The proposed modulation scheme synthesizes the reference voltage by choosing voltage vectors that cause smaller increases in the DC-link ripple current, avoiding those that cause larger increases. The effectiveness of the proposed optimized SVM is verified by simulations and experimental results. INDEX TERMS Three-level inverter, dc-link ripple current, capacitor, space-vector modulation, reliability. SEOK-MIN KIM (Graduate Student Member, IEEE) received the B.S. degree in electronic engineering from Sejong University, Seoul, South Korea, in 2013, and the M.S. degree in space survey information technology and the Ph.D. degree in electrical and computer engineering from

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An Optimum Hybrid SVPWM Technique for Three Level Inverter

Cited by 3 publications

References 14 publications

Impact of the Integration of a STATCOM Controlled by LQG/H2 Regulator in an Energy System

Impact of the Integration of a STATCOM Controlled by LQG/H2 Regulator in an Energy System

Four-Level Hysteresis-Based DTC for Torque Capability Improvement of IPMSM Fed by Three-Level NPC Inverter

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

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