The paper introduces a novel, scalable control allocation (CA) formulation for active capacitor balancing of the Modular Multilevel Converter (MMC). is obtained by introducing converter arm model that also and accommodates an MMC with any number phases submodules (SM). CA algorithm involves fast real-time minimization error cost function formalized as linear programming (LP) quadratic (QP) prob...

A large number of modular multilevel converters (MMC) are connected to HVDC transmission systems nowadays. This paper aims at the short-circuit fault in DC line system and problem capacitor voltage imbalance MMC, proposing a new type MMC sub-module, which has both self-clearing ability self-balancing ability. sub-module combines topology half bridge full bridge. It uses reverse forcibly turn of...

The installation of shunt capacitors in primary distribution electrical networks can effectively reduce energy and peak power losses, while improving voltage profile. Economic and operational benefits depend mainly on the number, locations and sizes of the capacitors installed. Several approaches devoted to this problem have been reported in the literature. However, most of them adopt some unre...

Abstract This article presents a modular switched-capacitor multilevel inverter which uses two capacitors and single dc source to obtain triple voltage gain. It is worth noting that the inherent inversion capacity removes H-bridge, can efficaciously diminish stress of switches, maximum (MVS) on devices kept within 2 V . Additionally, proposed topology able integrate inductive load, capacitor se...

Unified power quality conditioner is one of the advanced forms of power conditioning device, which is a combination of back to back connected series APF and shunt active power filter (SAPF) connected to a common DC link voltage. This topology will facilitates this device to have a reduced dc-link voltage without reducing its compensation capability. This device is mainly used in improving the p...

This paper proposes the virtual flux based direct power control for Vienna rectifier. No need for the input voltage sensors, the current regulation loop and PWM voltage modulation block along with the active and reactive power decoupling are some of the salient advantages of this method that make it suitable for controlling the conventional active rectifiers. However, due to the three-level nat...

Three-phase three-level dual-active-bridge (3L-DAB3) converters are a potential topology for high-voltage and high-power applications. Neutral-point voltage balancing is complex important issue (3L) circuits. Compared with the single-phase 3L converter, self-balancing capability of 3L-DAB3 limited. To guarantee reliability neutral-point method proposed in this paper. First, principle analyzed. ...

Abstract This paper introduces a nine-level (9L) boost inverter with reduced number of components. The proposed 9L topology comprises single DC source, eight switches, and two capacitors, namely switched-capacitor (SC) floating capacitor (FC). consists converter units: the SC unit FC unit. Both units are cascaded to achieve nine voltage levels gain 2. inherent boosting capability makes it suita...