A novel modulation method for reducing common mode voltage in three-phase inverters

Noroozi, Negar; Zolghadri, Mohammad Reza; Yaghoubi, M.

doi:10.1109/eeeic.2017.7977818

Cited by 4 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…VI, V3, and V5 for the only-odd modulation and between the even states V2, V4, and V6 for the only-even modulation. Odd-zero PWM (OZPWM) has been proposed in Noroozi et al (2017), which is a novel modulation technique based on reduced common mode (RCM) method. In this technique, two adjacent odd vectors and zero vector (000) are used.…”

Section: Aspects and Pwm Strategies Reducing Itmentioning

confidence: 99%

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Chattejee,

Chakraborty,

Dalapati

2023

Power Electronics and Drives

View full text Add to dashboard Cite

The core of most power electronic systems involving DC/AC conversion is a voltage source inverter (VSI) that runs on some pulsewidth modulation (PWM) strategy. Numerous PWM techniques have been reported in the literature over the past few decades, each having its own merits and limitations. This paper reviews some selected areas of two-level PWM VSI, namely proper utilisation of the DC bus without deteriorating the quality of the output waveform, switching-loss reduction in the linear and over-modulation zones, common-mode voltage and PWM strategies for its reduction or elimination, distortion of the output voltage owing to dead time, and its compensation. These phenomena are explained in brief, followed by discussions on different research works relevant to these areas, and their advantages and disadvantages. Finally, the paper shows prospective directions in which research may continue in these areas in future.

show abstract

Section: Aspects and Pwm Strategies Reducing Itmentioning

confidence: 99%

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Chattejee,

Chakraborty,

Dalapati

2023

Power Electronics and Drives

View full text Add to dashboard Cite

show abstract

“…Finally, in the case of the ground impedance, the capacitive and inductive effects are disregarded in the system. Therefore, the impedance is considered mainly resistive [18]. The different states that can be proposed to control the DCM-232 inverter in which the structure consists of ten switches are summarized in Table 1.…”

Section: Topology Description and Proposed Space Vector Pwm Techniquesmentioning

confidence: 99%

Hybrid PWM Techniques for a DCM-232 Three-Phase Transformerless Inverter with Reduced Leakage Ground Current

et al. 2021

View full text Add to dashboard Cite

Pulse Width Modulation (PWM) strategies are crucial for controlling DC–AC power converters. In particular, transformerless inverters require specific PWM techniques to improve efficiency and to deal with leakage ground current issues. In this paper, three hybrid PWM methods are proposed for a DCM-232 three-phase topology. These methods are based on the concepts of carrier-based PWM and space vector modulation. Calculations of time intervals for active and null vectors are performed in a conventional way, and the resulting waveforms are compared with a carrier signal. The digital signals obtained are processed using Boolean functions, generating ten signals to control the DCM-232 three-phase inverter. The performance of the three proposed PWM methods is evaluated considering the reduction in leakage ground current and efficiency. The proposed modulation techniques have relevant performances complying with international standards, which make them suitable for transformerless three-phase photovoltaic (PV) inverter markets. To validate the proposed hybrid PWM strategies, numerical simulations and experimental tests were performed.

show abstract

“…All along the paper, the capacitive and inductive effects of the ground impedance are disregarded in the analysis. Therefore, the impedance is considered mainly resistive

R_{GND}

[26]. However, the

i_{LKG}

reduction methods presented in this document are still valid when considering those above inductive and capacitive effects.…”

Section: CMV Analysismentioning

confidence: 99%

Effects of modulation techniques on leakage ground currents in a grid‐tied transformerless HB‐NPC inverter

Martinez-Garcia

Martinez‐Rodriguez

Escobar

et al. 2019

IET Renewable Power Generation

View full text Add to dashboard Cite

In this paper, a comparative study of modulation techniques used in a transformerless H-bridge neutral point clamped (HB-NPC) multilevel inverters is presented. Transformerless inverters, usually found in photovoltaic (PV) applications, are more efficient and economically affordable than isolated systems. Nevertheless, they may cause leakage ground currents. The latter are produced by the stray capacitances formed between the PV panel frame and the ground path. There are different ways to overcome the leakage ground current issue in transformerless topologies, for instance using topologies that generate almost zero leakage currents, by using adequate modulation techniques, by inserting additional filters, and by using adequate control schemes, among others. The comparative study, considers five modulation strategies, namely, level-shifted pulse-width modulation (PWM), phase-shifted PWM, three-level PWM, two sectors hybrid PWM and six sectors hybrid PWM. As it will be demonstrated through the common-mode model analysis, the three last modulations strategies are aimed at alleviating the leakage ground current issue. In this study, the two sectors hybrid PWM and the six sectors hybrid PWM are proposed. These modulation techniques lead to obtaining five output voltage levels keeping the RMS value of the leakage currents bounded for the transformerless HB-NPC inverter.

show abstract

A novel modulation method for reducing common mode voltage in three-phase inverters

Cited by 4 publications

References 16 publications

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Pulse-width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives

Hybrid PWM Techniques for a DCM-232 Three-Phase Transformerless Inverter with Reduced Leakage Ground Current

Effects of modulation techniques on leakage ground currents in a grid‐tied transformerless HB‐NPC inverter

Contact Info

Product

Resources

About