Cycloconverter performs the power converting function in a single stage without any intermediate d.c link i.e the cycloconverter can produce adjustable voltage, adjustable frequency ac power from an ac source of fixed voltage and frequency. The production of harmonics in the output of a cycloconverter as a result of the process of voltage synthesis is unavoidable. The direct process of frequenc...

Electrolytic capacitors are a bottleneck for inverter lifetime. Because of the large capacitances used in PV-inverters, a direct replacement by film-capacitors is not feasible for most topologies. This paper presents an active circuit which acts as an interface between the DC-link of a PV-inverter and an additional storage capacitor. By allowing a large voltage ripple at the storage capacitor, ...

Abstrad This paper addresses the non-linear problem of regulating the DC link voltage, in a vector controlled threephase boost type PWM converter with particular emphasis on applications in wind energy systems. The AC side current control is performed in a synchronously rotating reference frame. An analysis of the system is provided and several alternative DC link voltage controller designs are...

The exhaustion of fossil fuel and the greenhouse gas emission are one of the most significant energy and environmental issues, respectively. Photovoltaic (PV) generators and battery energy storage systems (BESSs) have been significantly increased for recent years. The BESSs are mainly used for smoothing active power fluctuation of the PV. In this paper, PV‒BESSs integration of two DC/DC convert...

In all multilevel topology with several DC link, the voltage balancing problem of DC capacitors is a key problem. This paper proposes a new topology of chopper circuit for dc capacitor voltage balancing in diode clamped multilevel inverters (DCMLI). In the presented topology the number of switches is reduced respect to other proposed topology in literatures. Suggested topology is modular and ha...

In recent years, the push towards electrifying transportation has gained significant traction, with battery-electric vehicles (BEVs) emerging as a viable alternative. However, widespread adoption of BEVs faces multiple challenges, such limited driving range, making powertrain efficiency improvements crucial. One approach to improve energy is adjust DC-link voltage using DC-DC converter between ...

Degradation of the dc-link capacitance due to aging, cell failure, and fuse failure has a negative impact on ac-side current THD distribution static compensator (D-STATCOM) power quality. These variations noticeably increase modulation index voltage ripple leading growing D-STATCOM. To solve this problem, article proposes modification mechanism as secondary control layer added common structure,...

This paper presents a control for a three-phase seven-level diode-clamped multilevel inverter (DCMLI) for photovoltaic (PV) systems which improves DC link utilization, output voltage quality and avoids the DC link capacitor voltage balancing problem experienced with standard multilevel operation. The maximum power point tracking (MPPT) is capable of extracting maximum power from PV array connec...