Abstract-Voltage sag or unbalance conditions at the input rectifier stage of the ac-dc-ac rectifier-inverter induction motor drive can cause the significant amounts of harmonic voltage at twice the line frequency 2f1. This voltage ripple can have a degrading effect on the induction-machine performance characteristics. This paper presents an analytical closed-form mathematical model and analysis...

Parameter Optimization in the Design of a Grid-side Converter Controller in the Light of Grid faults is presented. The primary aim is to provide for a fault-ride-through (FRT) capability of Wind Turbine with Doubly Fed Induction Generator in the Light of new grid codes. New grid codes require that the wind turbines remain continuously on-line and supply the grid during voltage sags. An active d...

The optimization of both dc link voltages and switching angles of fundamental switching strategy for the output waveform of a multilevel cascade inverter is investigated in this study. Previous work in the area of fundamental switching for multilevel inverters is highlighted by the pulse width optimization technique, where the switching angle at each voltage level is optimized, so that the resu...

Airborne wind energy (AWE) systems with electrical machine on the ground are a promising alternative to classical wind turbines. Such systems are operated in pumping mode with the reel-out phase generating electrical power and the reel-in phase dissipating power [1]. We discuss DC-link voltage control of the grid-side voltage source inverter (VSI) which controls active power flow from the machi...

To provide transmission-line voltage support, a static compensator (STATCOM) offers the optimal solution in terms of price, reliability, and dynamic performance. Simpler layout for switches, reduced component count and smaller dc-link capacitor values are the attractive features of the proposed topology over the diode clamped and cascaded multilevel converter. Two dc-link voltage sources with v...

this paper presents a grid connected photovoltaic system, which acts as both power generator and active power filter (apf), based on flying capacitor multicell (fcm) converter. increase in the number of output voltage levels, natural self-balancing of flying capacitors and dc link voltage and lower power rating of components are the main futures of fcm converter compared with conventional multi...

The existence of unreliable renewable energy resources would be required to use energy resources and storage units simultaneously, particularly in applications such as electrical vehicles and stand-alone energy supplying systems. The objective of this paper is to introduce a new topology of multi input converter in hybrid power supply system of photovoltaic, fuel cell and battery for medium pow...

It is normally assumed that the dc-link is a perfect constant dc voltage. However. in a practical system. it contains ripple components due to the rectification process. An analysis of the power conversion process shows that the power at the dclink consists of constant active power as well as a pulsating component that fluctuates at twice the mains frequency. When a VSI is powered by the fluctu...

A high computational burden is required in conventional model predictive control, as all of the voltage vectors of a power inverter are used to predict the future behavior of the system. Apart from that, the common mode voltage (CMV) of a three-phase four-leg inverter utilizes up to half of the DC-link voltage due to the use of all of the available voltage vectors. Thus, this paper proposes a n...