In this paper, the authors investigated a Direct Drive Permanent Magnet Synchronous Generator Wind Turbine (PMSG-WT). This study deals with control of the PWM back-to-back converter (AC/AC) of the wind turbine, since the average size of WTG installations has increased due to the advent of larger capacity machines, especially variable speed technology, this raise of integration rate of wind ener...

Recently, the penetration of renewable energy sources (RESs) into electrical power systems is witnessing a large attention due to their inexhaustibility, environmental benefits, storage capabilities, lower maintenance and stronger economy, etc. Among these RESs, offshore wind plants (OWPP) are ones most widespread that have emerged with regard being competitive other technologies. However, appl...

According to the grid code specifications, low voltage ride-through (LVRT) is one of key factors for grid-tied wind farms (WFs). Since fixed-speed turbines with squirrel cage induction generators (FSWT-SCIGs) require an adequate quantity reactive power throughout transient period, conventional WF consisting SCIG do not typically have LVRT capabilities that may cause instability in system. Howev...

Grid faults are found to be one of the major issues in renewable energy systems, particularly wind conversion systems (WECS) connected grid via back-to-back (BTB) converters. Under such faulty conditions, system requires an effective regulation active (P) and reactive (Q) power accomplish low voltage ride through (LVRT) operation accordance with codes. In this paper, improved finite-control-set...

Faults in medium and high voltage grids lead to voltage sags in the low voltage level. Due to the voltage dip, distributed generators disconnect from the low voltage grid. Depending on the amount of disconnected generation, system stability could be compromised. With a dynamic grid support, distributed generators remain connected to the grid during faults, also called fault ride-through. Moreov...

This paper presents a synchronverter based photovoltaic (PV) system as STATCOM (PV-STATCOM), in which inverter exchanges active and reactive power with the grid. The proposed provides compensation during daytime well nighttime. Additional operating modes for PV-STATCOM are to enhance its capability. controller is compared conventional control on basis of performance different tests. key differe...

Abstract There are various types of distributed generators (DGs) with different grid integration strategies. The transient characteristics the fault currents provided by DGs to those conventional synchronous generators. In this paper, a distribution network multi-type is investigated, including consideration DG low-voltage ride through (LVRT). current two typical DGs, i.e. an inverter-interface...

In the conventional structure of the wind turbines along with the doubly-fed induction generator (DFIG), the stator is directly connected to the power grid. Therefore, voltage changes in the grid result in severe transient conditions in the stator and rotor. In cases where the changes are severe, the generator will be disconnected from the grid and consequently the grid stability will be attenu...

With the increase of photovoltaic penetration rate, fluctuation power generation affects reliability ship grids. Marine PV grid-connected systems with high rates should generally have a low voltage ride-through capability. In present paper, strategy in which super capacitors are applied for energy storage marine system is proposed, and an inverter adopts independent decoupling control active re...