As electrical energy will be supplied from renewable sources; large wind farms are being connected to the existing distribution network may lead to the increasing fault levels beyond the capacity of existing switchgear. Also, with connecting distributed generation the radial structure of distribution network is disturbed and some disruption may appear to its protection system. Using fault current limiters at the output of large distributed generation units, can be considered as a solution to restrict the fault current and prevent disruption performance of protective equipment. In this paper, resistive superconducting fault current limiters (RFCLs) are introduced and their performance in management of fault level in a power system including wind turbine shown by PSCAD/EMTDC simulation. Studies showed that the proposed FCL is not only able to decrease fault level but also can to prevent incoordination protective equipment to the network. Keywords-renewable energy, Doubly fed induction generator (DFIG), resistive superconducting fault current limiter Introduction,short circuit currentTHE last few years has seen a huge investment in renewable energy resources as alternative sources of energy. Renewable energy sources such as wind turbine and photovoltaic systems are favored for their advantages, such as low maintenance and low pollution. In recent decades, Wind energy is the fastest growing source of renewable energy in the power industry [1].Among the different alternatives to construct variable speed wind turbines, doubly fed induction generators (DFIGs) are the most commonly used. The major benefit of the doubly-fed induction generator, which has made it popular, is that the power electronic equipment only has to handle a fraction (20-30%) of the total system power. This means that the losses in the power electronic converter can be reduced compared to a system where the converter has to handle the total power. In addition, the cost of the converter becomes lower [2][3][4]. With the rapid development of the wind turbine generation system and its increased capacity, the level of associated short-circuit current during a fault will be increased in the distribution system and it can lead to the increasing fault levels beyond the capacity of existing switchgear and network equipments. Then, these protection devices must be upgraded with a higher shortcircuit rating or they must be set up again according to the new conditions of the changed power grid. The former situation requires high costs for the replacement of the protection devices [5].Using fault current limiters at the output of wind turbines, can be considered as a solution to restrict the fault current and prevent disruption performance of protective equipment [6]. Fault current limiting devices have been put forward in the form of power electronics, magnet technology, solid state and superconducting materials. The superconducting fault current limiter (SFCL) causes no power loss in a steady-state condition and improves the transient stability of power system...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.