An Optimal Full Frequency Control Strategy for the Modular Multilevel Matrix Converter Based on Predictive Control

Abstract

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Fig. 1 (a), can be used to connect two three-phase electrical systems (input side and output side systems) using nine active branches. Each branch consists of a cascaded connection of full-bridge cells and a branch inductor. This topology was first proposed by R. Erickson and O. Al-Naseem in 2001 [2]. In common with other members of the modular multilevel cascade converter family [1], the M3C can easily reach high voltage ratings as well as significantly reduce voltage harmonics and electromagnetic interference. In addition, the modular structure makes it easier to accomplish construction, maintenance and thermal designs.Initially, the M3C topology was presented and researched without branch inductors. Space vector modulation (SVM) based capacitor-voltage balancing methods are proposed in

Control of a Modular Multilevel Matrix Converter for Unified Power Flow Controller Applications

“…The circulating current control is enhanced using proportional-resonant controllers implemented in the synchronous frame. This is different from the control systems previously published for M 3 C applications (see [15][16][17][18]23,26]) where proportional controllers implemented in the stationary αβ frame were utilized, which cannot ensure zero steady-state error.…”

“…Each circulating current is controlled using Proportional Multi-Resonant (PMR) controllers, which are tuned to regulate the circulating current harmonics produced by the CCV control systems. This is certainly an improvement over the conventional control approach where proportional controllers are used [15][16][17][18]23,26].…”

“…On the other hand, the EFM is enabled when the absolute value of the input-port frequency is very close or equal to the output-port frequency. In this case, circulating currents and common-mode voltage are used in the control systems to mitigate the oscillations in the floating capacitor voltages [18,23,26].…”

A Hierarchical Energy Balance Control Method for M3C Based on Injecting Output Frequency Circulating Currents

“…This idea is similar to the commonly used "negative sequence current injection" methods in the star-connected cascaded H-bridge converters (CHBC) [26]. Several predictive control methods are also developed for M 3 C in [27]- [30]. However, predictive control method needs accurate system parameters and a huge amount of real time calculation which makes it less practical.…”

An Overview of Modelling Techniques and Control Strategies for Modular Multilevel Matrix Converters

“…The CCV control is categorised as NSCR or CCR. The LCB control methods are divided into Phase-Shifted (PS) Pulse Wide Modulation (PWM) (e.g., [52,53]), Level Shifted (LS) PWM (e.g., [43,51]), Space Vector Modulation (e.g., [54][55][56] and Predictive Control (e.g., [50,57]). Finally, the operating mode can be Balancing Control or Mitigation Control.…”