This paper deals with permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS) integrated with grid with two back to back connected converters with a common DC link. The aim of this research is to model control of direct driven 1.5 MW wind turbine permanent magnetic synchronous generator (PMSG) which feeds alternating current (AC) power to the utility grid .The m...

Voltage sags are normally described by magnitude variation and duration. In addition to these quantities, sags are also characterized by unbalance (asymmetry), nonsinusoidal waveshapes, and phase angle shift (phase jump). These factors are important for determining the behavior of ac motor drives during sags. Voltage unbalance and phase angle shifts cause large unbalanced source currents to, ex...

Condition-monitoring systems are used to determine the best timing for predictive maintenance of power electronics converters. These monitoring can significantly reduce converter repair time and increase system availability. In this article, an investigation has been conducted on possibility using dissipation factor as a lifetime indicator electrolytic capacitors. A criterion is also proposed b...

This paper proposes the use of a Modular Marx Multilevel Converter, as a solution for energy integration between an offshore Wind Farm and the power grid network. The Marx modular multilevel converter is based on the Marx generator, and solves two typical problems in this type of multilevel topologies: modularity and dc capacitor voltage balancing. This paper details the strategy for dc capacit...

The dc-link capacitor is considered as a weak component in photovoltaic (PV) inverter systems and its reliability needs to be evaluated tested during the product development. Conventional testing methods for capacitors are typically carried out under constant loading conditions, which do not reflect real operating conditions (e.g., mission profile) of PV inverters. To address this issue, new co...

The characteristics of Static Synchronous Series Compensator (SSSC) based on six-pulse Voltage Source Converter (VSC), which is inserted in series into a three phase inductive system, are analyzed and calculated in detail in its inductive and capacitive operation modes, including the AC, DC current and DC capacitor voltage in one period. And the expressions for them are derived in order to asse...

DC-offset and DC-suppression are key parameters in bioelectric amplifiers. However, specific DC analyses are not often explained. Several factors influence the DC-budget: the programmable gain, the programmable cut-off frequencies for high pass filtering and, the low cut-off values and the capacitor blocking issues involved. A new intermediate stage is proposed to address the DC problem entirel...

This paper shows a new direction as to how the transformer parameters may be best utilized and presents the performance and control of novel DC/DC and AC/DC converter topologies. All the three inductances of a transformer have been utilized to realize a CL topology having excellent characteristics and requiring no external inductor. For half bridge topology the capacitor used for the purpose of...

This paper shows a new direction as to how the transformer parameters may be best utilized and presents the performance and control of novel dc/dc and ac/dc converter topologies. All three inductances of a transformer have been utilized to realize a 3 topology having excellent characteristics and requiring no external inductor. For half-bridge topology, the capacitor used for the purpose of inp...