In this paper, to enhance voltage stability of distribution systems, a Network Topology based load flow results are used to calculate Voltage Stability Index (VSI). Then an algorithm for capacitor placement (CP) based on this voltage stability index is implemented to determine the optimal locations, number and size of fixed and/or switched shunt capacitors for voltage stability enhancement, in ...

High-voltage and power capability of multilevel converters better used for unified power-flow controller (UPFC application). The three-level neutral-point-clamped (NPC) converter allows back-to-back connection as the UPFC shunt and series converters than other multilevel topologies. In place of the pulse width-modulated (PWM) multilevel control schemes, constant dc-link voltage and balanced vol...

Quasi-2-level (Q2L) operation of multi-level bridge-legs, especially flying-capacitor converters (FCC), is an interesting option for realizing single-cell power conversion in applications whose system voltages exceed the ratings available semiconductors. To ensure equal voltage sharing among a Q2L-FCC’s switches, minimized flying capacitors (FCs) must always be balanced. Thus, we propose concep...

The electrical performance of Hybrid capacitors (US Patent 5,369,547) using high capacitance density electrochemical capacitor cathodes, electrolytic capacitor anodes and dielectric, and compatible electrolytes is strongly influenced by the nature of the electrolyte employed and the physical characteristics of the electrodes. Management of overall capacitor performance usually involves optimizi...

Nowadays, because of the need to decrease fuel consumption and greenhouse gas emissions and also their capability of exchanging power with the grid and regulating the frequency and voltage of the grid at different times of the day, electric vehicles are used more than before all across the world. It is highly important to pay attention to the efficiency, and decrease in the weight and volume of...

The operation of single-phase Modular Multilevel Converter (MMC) is analyzed in the paper. A mathematical model converter developed and described, based on which structure selection parameters for Classical Control Optimal Switching State Model Predictive (OSS-MPC) are defined. Additionally, procedure determination circuit parameters, such as submodule capacitance arm inductance, described carr...

Abstract This paper proposes a nine-level switched-capacitor step-up inverter (9LSUI) which can achieve quadruple voltage gain with single dc source. Differing from other inverters, the stress of switches is effectively reduced due to elimination H-bridge, and peak inverse all kept within 2 V . In addition, proposed able integrate inductive load, capacitor self-balancing be achieved without any...