Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters

  title={Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters},
  author={Qingrui Tu and Zheng Xu and Lie Xu},
  journal={PES T\&D 2012},
Summary form only given. This paper describes a modified phase-shifted carrier-based pulsewidth-modulation (PSC-PWM) scheme for modular multilevel converters (MMC). In order to reduce the average device switching frequency, a reduced switching-frequency (RSF) voltage balancing algorithm is developed. This paper also proposes a circulating current suppressing controller (CCSC) to minimize the inner circulating current in an MMC. Based on the double line-frequency, negative-sequence rotational… Expand
Analysis of the Phase-Shifted Carrier Modulation for Modular Multilevel Converters
The modular multilevel converter (MMC) is an emerging topology for high-power applications and is considered as the development trend of the high-voltage power converters. In this paper, generalExpand
Circulating Current Harmonics Suppression for Modular Multilevel Converters Based on Repetitive Control
Modular multilevel converters (MMCs) have emerged as the most promising topology for high and medium voltage applications for the coming years. However, one particular negative characteristic of MMCsExpand
Analysis of the Phase disposition PWM Modular Multilevel Converters with Voltage Balancing Control
A general control structure for MMC inverters is presented, suitable for both voltage-based and energy-based control methods, and includes voltage balancing between the upper and lower arms and a new method for voltage balancing among arm capacitors, based on an improved pulse-width modulation. Expand
Circulating current suppression with improved DC-link power quality for modular multilevel converter
The comparing results validate that the proposed MMC can exhibit much better performance under steady and dynamic conditions and can provide better DC-link power quality. Expand
Analysis on Displacement Angle of Phase-Shifted Carrier PWM for Modular Multilevel Converter
The proposed PSC-SPWM schemes can unify two different cases of odd and even SM situations for output voltage and circulating current harmonic minimization, respectively and are verified by simulation and experiments on an MMC prototype. Expand
A Repetitive Control Scheme for Harmonic Suppression of Circulating Current in Modular Multilevel Converters
In a modular multilevel converter (MMC), the interaction between switching actions and fluctuating capacitor voltages of the submodules results in second- and other even-order harmonics in theExpand
Modulation and control for a new hybrid cascaded multilevel converter with DC blocking capability
Summary form only given. The hybrid cascaded multilevel converter is a newly introduced voltage-source converter with dc blocking capability. It has two key parts, that is, the director switch (DS)Expand
Efficient Capacitor Voltage Balancing Method for Modular Multilevel Converter Under Carrier-Phase-Shift Pulsewidth Modulation
The disturbance and unbalance mechanisms of capacitor voltages in MMC system under CPS-PWM are theoretically revealed and solved, and a novel capacitor voltage balancing method is proposed that is highly efficient for different working conditions of MMC, and is easy to be designed/realized. Expand
New Approaches to Circulating Current Controllers for Modular Multilevel Converters
In the next years, modular multilevel converters (MMCs) are going to be a next generation multilevel converters for medium to high voltage conversion applications, such as medium voltage motorExpand
Repetitive control scheme for circulating current suppression in modular multilevel converters
Modular multilevel converters (MMC) are intensively researched and developed in high power, high/medium voltage applications. However, the interaction between switching action andExpand


VSC Transmission System Using Flying Capacitor Multilevel Converters and Hybrid PWM Control
A high-voltage direct current (HVDC) transmission system based on three-level flying capacitor (FC) multilevel converters with hybrid pulse-width modulation (PWM) is presented in this paper.Expand
Performance evaluation of half-bridge cascaded multilevel converters operated with multicarrier sinusoidal PWM techniques
High-power high-voltage power electronics systems with fully-controlled semiconductors can benefit from the development of modular solutions based on voltage-sourced building blocks. This paperExpand
Dynamic performance of a modular multilevel back-to-back HVDC system
The modular multilevel converter (MMC) is a newly introduced switch-mode converter topology with the potential for high-voltage direct current (HVDC) transmission applications. This paper focuses onExpand
New transformerless, scalable Modular Multilevel Converters for HVDC-transmission
A novel concept of high voltage direct current converter (HVDC) is presented employing the modular multilevel converter (M2C) using the new computation method presented and applied, which enables clear insight into the influence of various design parameters in a generalized form. Expand
Parameter design principle of the arm inductor in modular multilevel converter based HVDC
This paper describes two distinctive functions of the arm inductor in the modular multilevel converters (MMC): suppressing the circulating current and limiting the fault current rise rate. Based onExpand
On dynamics and voltage control of the Modular Multilevel Converter
This paper discusses the impact of modulation on stability issues of the Modular Multilevel Converter (M2C). The main idea is to describe the operation of this converter system mathematically, andExpand
Control and Performance of a Transformerless Cascade PWM STATCOM With Star Configuration
This paper presents a three-phase transformerless cascade pulsewidth-modulation (PWM) static synchronous compensator (STATCOM) intended for installation on industrial and utility power distributionExpand
A new mathematical model and control of a three-phase AC-DC voltage source converter
A new mathematical model of the power circuit of a three-phase voltage source converter (VSC) was developed in the stationary and synchronous reference frames. The mathematical model was then used toExpand
A new Multilevel Voltage-Sourced Converter Topology for HVDC Applications
SUMMARY Since the Seventies line commutated converters based on thyristor technology have been the standard for all HVDC applications. This converter topology is, however, marked by its loworderExpand
Multilevel Voltage-Sourced Converters for HVDC and FACTS Applications
Recent developments in the area of HVDC and FACTS are dominated by two new technology trends. This first is the in troduction of ultra high dc voltage systems for bulk power transmission, and theExpand