Energy storage devices are required for power balance and power quality in stand alone wind energy systems. A Vanadium Redox Flow Battery (VRB) system has many features which make its integration with a standalone wind energy system attractive. This paper proposes the integration of a VRB system with a typical stand-alone wind energy system during wind speed variation as well as transient performance under variable load. The investigated system consists of a variable speed wind turbine with permanent magnet synchronous generator (PMSG), diode rectifier bridge, buck-boost converter, bidirectional charge controller, transformer, inverter, ac loads and VRB (to store a surplus of wind energy and to supply power during a wind power shortage). The main purpose is to supply domestic appliances through a single phase 230V, 50Hz inverter. Simulations are accomplished in order to validate the stability of the supply. Figure 1. A vanadium redox flow battery I.
Introduction: Faculty members have little time and usually lack expertise to provide writing feedback on lab reports. Sending students to a writing center, an existing resource on virtually all college campuses, could fill that gap. However, the majority of peer writing tutors are in nontechnical majors, and little research exists on training them to provide support for engineering students. Research question: Can peer writing tutors without technical backgrounds be trained to provide effective feedback to engineering students? About the case: Previously, sending students to the writing center was ineffective. The students did not see the value and the tutors did not feel capable of providing feedback to them. To remedy this situation, an interdisciplinary training method was developed collaboratively by an engineering professor and the writing center director. Situating the case: Researchers have suggested that it is
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.