Abstract
According to the grid code specifications, low voltage ride-through (LVRT) is one of the key factors for grid-tied wind farms (WFs). Since fixed-speed wind turbines with squirrel cage induction generators (FSWT-SCIGs) require an adequate quantity of reactive power throughout the transient period, conventional WF consisting of SCIG do not typically have LVRT capabilities that may cause instability in the power system. However, variable-speed wind turbines with doubly fed induction generators (VSWT-DFIGs) have an adequate amount of LVRT enhancement competency, and the active and reactive power transmitted to the grid can also be controlled. Moreover, DFIG is quite expensive because of its partial rating (AC/DC/AC) converter than SCIG. Accordingly, combined installation of both WFs could be an effective solution. Hence, this paper illustrated a new rotor-side converter (RSC) control scheme, which played a significant role in ensuring the LVRT aptitude for a wide range of hybrid WF consisting of both FSWT-SCIGs and VSWT-DFIGs. What is more, the proposed RSC controller of DFIG was configured to deliver an ample quantity of reactive power to the SCIG during the fault state to make the overall system stable. Simulation analyses were performed for both proposed and traditional controllers of RSC of the DFIG in the PSCAD/EMTDC environment to observe the proposed controller response. Overall, the presented control scheme could guarantee the LVRT aptitude of large-scale SCIG.
Highlights
The wind speed utilized to individual wind turbine (WT) remained conso short, it was assumed that the wind speed did not vary significantly during this interval
The current study proposed partial integration of the Doubly Fed Induction Generator (DFIG) with the proposed rotor6
With the proposed rotorside controller based the PI controller tothe improve effectiveness of the a comparison suggested and conventional rotor side conside controller based on the PI controller improve the low voltage ride-through (LVRT) effectiveness of the evaluaSCIGtrollers was performed
Summary
It is even more evident that the significant burning of fossil fuels, price volatility, and rising awareness of environmental issues emphasized the importance of renewable and clean energy sources. Renewable energy sources are free, endless, clean, and readily available. With the installation of a 60.4 GW system in the wind industry, 2019 was a remarkable year as it was the second-biggest year in history. The new installation introduced global cumulative wind power (WP) capacity up to 651 GW and represented year-over-year (YoY) growth of 19%. The global wind energy council (GWEC) estimated the addition of a new capacity for more than 355 GW over the five years, with an annual installation of 71 GW until 2024 [1,2]
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