Minimum Loss Discontinuous Pulse-Width Modulation Per Phase Method for Three-Phase Four-Leg Inverter

Kim, Soo Yeon; Song, Sung Geun; Park, Sung Jun

doi:10.1109/access.2020.3006245

Cited by 16 publications

(9 citation statements)

References 26 publications

(36 reference statements)

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“…For the converter module level, the information exchange can be correlated to the power electronic building block modules, which comprise the voltage and current measurements, error flags along with pulse width modulation (PWM) references. At this level, the communication should be isochronous for the fixed packet size at a fixed rate [10]. The power converter components can be subjected to numerous serious threats, attacks, faults, false data injection attacks, unpredicted failures, and cyber-physical switching attacks [11].…”

Section: Introductionmentioning

confidence: 99%

CPS Attacks Mitigation Approaches on Power Electronic Systems With Security Challenges for Smart Grid Applications: A Review

et al. 2021

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This paper presents an inclusive review of the cyber-physical (CP) attacks, vulnerabilities, mitigation approaches on the power electronics and the security challenges for the smart grid applications. With the rapid evolution of the physical systems in the power electronics applications for interfacing renewable energy sources that incorporate with cyber frameworks, the cyber threats have a critical impact on the smart grid performance. Due to the existence of electronic devices in the smart grid applications, which are interconnected through communication networks, these networks may be subjected to severe cyber-attacks by hackers. If this occurs, the digital controllers can be physically isolated from the control loop. Therefore, the cyber-physical systems (CPSs) in the power electronic systems employed in the smart grid need special treatment and security. In this paper, an overview of the power electronics systems security on the networked smart grid from the CP perception, as well as then emphases on prominent CP attack patterns with substantial influence on the power electronics components operation along with analogous defense solutions. Furthermore, appraisal of the CPS threats attacks mitigation approaches, and encounters along the smart grid applications are discussed. Finally, the paper concludes with upcoming trends and challenges in CP security in the smart grid applications.

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Section: Introductionmentioning

confidence: 99%

CPS Attacks Mitigation Approaches on Power Electronic Systems With Security Challenges for Smart Grid Applications: A Review

et al. 2021

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“…Split dc-link capacitor 3-leg inverter can reduce the imbalance rate by allowing the unbalanced current flowing on the neutral line to flow to the mid-point of the capacitor. However, as the imbalance rate increases, the current flowing to the neutral line increases, which occurs a voltage imbalance problem in dc-link, which causes problems such as an imbalance in output voltage and an increase in the distortion and a dc component [23]- [29]. To solve the problems, 4-leg inverter can be a good alternative.…”

Section: Introductionmentioning

confidence: 99%

Imbalance Compensation of the Grid Current Using Effective and Reactive Power for Split DC-Link Capacitor 3-Leg Inverter

et al. 2021

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Unbalanced loads cause the imbalance of the grid current and the resulting imbalance of the grid voltage when the imbalance rate of the grid current increases considerably. To cope with this problem flexibly at low cost, we modify the circuit structure from previously installed Δ-Y transformer 3-phase 3leg inverter to split dc-link capacitor 3-leg inverter eliminating the transformer. And then we propose two kinds of compensation algorithms for balancing the grid current that can basically utilize a preinstalled control board. It is divided into reactive compensation, where dc-link of the inverter does not supply effective power to the grid but compensates for the imbalance of grid current, and effective compensation, where dc-link of the inverter supplies effective power to the grid for compensating the unbalanced grid current. We design an additional power calculator board to obtain power information, and apply it to a 10kW prototype, and then verify its validity through PSIM simulation and experiments.INDEX TERMS energy storage system (ESS), power conditioning system (PCS), sinusoidal pulse width modulation (SPWM), split dc-link capacitor, 3-leg inverter, 3-phase 4-wire system, unbalanced current compensation.

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“…However, as the imbalance rate of the load increases, the current flowing to the neutral line increases, which occurs a voltage imbalance problem at the dc-link stage. As a result, it causes problems such as imbalance of output voltage and increased voltage distortions [1][2][3][4][5][6][7][8]. The 4-leg inverter can be applied with the space vector pulse width modulation (SVPWM) algorithm even if a leg is added, which makes switching control easy and the dc-link voltage utilization ratio high [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Output Voltage Imbalance Compensation Using dc Offset Voltage for Split dc-Link Capacitor 3-Leg Inverter

et al. 2021

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In this paper, we analyzed the output voltage imbalance and the cause of the offset voltage in 3-phase 3-leg inverters by using Millman’s theory. Based on this result, we proposed a voltage imbalance compensation algorithm using the dc offset voltage that appeared at the neutral point voltage of the load. To apply the proposed imbalance compensation algorithm, it needs a circuit structure of 3-phase 4-wire such as split dc-link capacitor 3-leg inverter and 4-leg inverter. Therefore, the total harmonic distortion (THD) of the load phase current according to the imbalance rate of the load was analyzed for the two inverters. Then, PSIM simulation and experiments based on a 10 kW-prototype of split dc-link capacitor 3-leg inverter were implemented to verify the validity of the proposed imbalance compensation algorithm.

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Minimum Loss Discontinuous Pulse-Width Modulation Per Phase Method for Three-Phase Four-Leg Inverter

Cited by 16 publications

References 26 publications

CPS Attacks Mitigation Approaches on Power Electronic Systems With Security Challenges for Smart Grid Applications: A Review

CPS Attacks Mitigation Approaches on Power Electronic Systems With Security Challenges for Smart Grid Applications: A Review

Imbalance Compensation of the Grid Current Using Effective and Reactive Power for Split DC-Link Capacitor 3-Leg Inverter

Output Voltage Imbalance Compensation Using dc Offset Voltage for Split dc-Link Capacitor 3-Leg Inverter

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