منابع مشابه
US line-ups outperform UK line-ups
In the USA and the UK, many thousands of police suspects are identified by eyewitnesses every year. Unfortunately, many of those suspects are innocent, which becomes evident when they are exonerated by DNA testing, often after having been imprisoned for years. It is, therefore, imperative to use identification procedures that best enable eyewitnesses to discriminate innocent from guilty suspect...
متن کاملislanding detection methods for microgrids
امروزه استفاده از منابع انرژی پراکنده کاربرد وسیعی یافته است . اگر چه این منابع بسیاری از مشکلات شبکه را حل می کنند اما زیاد شدن آنها مسائل فراوانی برای سیستم قدرت به همراه دارد . استفاده از میکروشبکه راه حلی است که علاوه بر استفاده از مزایای منابع انرژی پراکنده برخی از مشکلات ایجاد شده توسط آنها را نیز منتفی می کند . همچنین میکروشبکه ها کیفیت برق و قابلیت اطمینان تامین انرژی مشترکان را افزایش ...
15 صفحه اولA Compact Topology for Single-Phase Line-Interactive UPS Using Small DC-Link Capacitor
A novel pulse-width modulated (PWM) single-phase line-interactive uninterruptible power supply (UPS) based on the small dc bus capacitor is presented. The proposed system is made up of an ac chopper which includes a diode rectifier, a boost switch, a charger and an inverter. It has the features of a small dc bus capacitor, small input and output inductors, and low switching loss, and is very su...
متن کاملMock-ups as "interactive laboratories": mixed methods research using inpatient unit room mock-ups.
OBJECTIVE To establish evidence-based design (EBD) guidelines for inpatient rooms at Department of Veterans Affairs (VA) facilities. BACKGROUND Simulation allows clients, designers, and researchers to visualize how users might interact with a proposed design before actual construction of the design. This study used mock-ups as a simulation technique during a study of the VA inpatient room sta...
متن کاملA Comparison of Grounding Techniques for Distributed Generators Implemented in Four-wire Distribution Grids, Ups Systems and Microgrids
This paper starts with an overview of the common grounding techniques used in distribution grids. Next some important issues and problems related to grounding of distributed generators implemented in these grids will be described. Two applications will be discussed in detail: UPS systems and microgrids. The presence of a neutral conductor in these systems and the ability to operate both in grid...
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ژورنال
عنوان ژورنال: IEEE Transactions on Industrial Electronics
سال: 2014
ISSN: 0278-0046,1557-9948
DOI: 10.1109/tie.2013.2262763