Generalized SVPWM-based capacitor voltage balancing for modular multilevel converters

Ronanki, Deepak; Williamson, Sheldon S.

doi:10.1109/cpe.2018.8372504

Cited by 11 publications

(2 citation statements)

References 20 publications

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“…Simplified SVPWM approaches are proposed in Refs. [17,18]. These methods require injecting zero-sequence voltage or commonmode voltage into the three-phase modulation signals to generate new modulation signals.…”

Section: Introductionmentioning

confidence: 99%

Space vector pulse width modulation strategy for modular multilevel converters in power system

Zhenhong

Xiong

et al. 2023

IET Cyber-Phy Sys Theory & Ap

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As a superior modulation strategy, space vector pulse width modulation (SVPWM) provides redundant voltage vectors and adjustable action time, which can achieve multi‐objective control of modular multilevel converter (MMC). An SVPWM strategy suitable for MMC is proposed. The strategy is divided into three stages. In the first stage, the appropriate voltage vector, the action time and the basic sub‐module (SM) input number are quickly calculated to ensure the output quality by equating MMC as a 2‐level inverter. In the second stage, a finite set of the circulating current suppression is established on the basis of the basic SM input number. The optimal SM input number is selected through rolling optimisation. In the last stage, according to the SM voltage sorting and the optimal SM input number, the optimal switching state is determined to realise the SM voltage balance control. The proposed control strategy simplifies the design of the control system, reduces the computational burden and can be easily extended to MMC with any SM number. The simulation and experimental results show that the proposed SVPWM strategy can reduce the circulating current and balance the SM capacitor voltage while ensuring the output quality.

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Section: Introductionmentioning

confidence: 99%

Space vector pulse width modulation strategy for modular multilevel converters in power system

Zhenhong

Xiong

et al. 2023

IET Cyber-Phy Sys Theory & Ap

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show abstract

“…On the other hand, high-frequency PWM schemes that are used to control the MMC are carrier-based PWM (CPWM) [phasedisposition PWM (PD-PWM) and phase-shifted PWM (PS-PWM)] and space-vector PWM (SV-PWM) methods [25][26][27][28][29][30][31]. The CPWM methods are the most used PWM schemes for MMC due to its good control capability and easy implementation compared to SV-PWM methods.…”

Section: Introductionmentioning

confidence: 99%

New modulation scheme and voltage balancing control of modular multilevel converters for modern electric ships

Ronanki

Williamson

2019

IET Power Electronics

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The distinctive features such as fault-tolerability, modularity, power and voltage scalability have propelled modular multilevel converters (MMCs) as one of the emerging power converter topologies for marine applications. Pulse-width modulation (PWM) schemes are widely used to control the MMCs due to their good control capability and ability to operate at higher switching frequencies. However, the required number of carriers for gating signal generation drastically increases with the submodule count per arm in an MMC. Moreover, these carriers should be accurately synchronised with each other to generate high power quality waveforms. However, it is hard to establish accurate synchronisation between these carriers due to the sampling issues, memory limitations, and computational delays. In addition, the MMC demands reconfiguration of PWM carriers and control strategy for voltage scalability and retrofit applications. To avoid these issues, a simple PWM scheme using one carrier is proposed in this study. The main advantage of the proposed scheme is an easy extension to the n-level MMC with a wide range of output voltage levels. The effectiveness of the proposed PWM scheme along with the capacitor voltage balancing control is demonstrated through detailed simulations and verified experimentally under steady-state and dynamic conditions.

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A Novel 2N+1 Carrier-Based Pulse Width Modulation Scheme for Modular Multilevel Converters with Reduced Control Complexity

Ronanki

Williamson

2019

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Generalized SVPWM-based capacitor voltage balancing for modular multilevel converters

Cited by 11 publications

References 20 publications

Space vector pulse width modulation strategy for modular multilevel converters in power system

Space vector pulse width modulation strategy for modular multilevel converters in power system

New modulation scheme and voltage balancing control of modular multilevel converters for modern electric ships

A Novel 2N+1 Carrier-Based Pulse Width Modulation Scheme for Modular Multilevel Converters with Reduced Control Complexity

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