نتایج جستجو برای: low voltage

تعداد نتایج: 1284475  

Journal: :Iet Renewable Power Generation 2022

Abstract Power grid is facing several challenges such as voltage violation, power losses, and quality issues due to the high integration of renewable energy sources solar wind. One strategies overcome violation problem provision reactive from wind plants. Local controller these plants coordinates with generate power. The coordinated performs its function based on information obtained whole via ...

A. Yazdian, M. Mohamadian, S. M. Dehghan,

In this paper a hybrid active DC line conditioner for fluctuations and ripples reduction in voltage and current of DC power systems is proposed. Malfunctions in operation of equipments and systems which are supplied by low quality distribution power systems are one of the main effects of DC voltage ripple. In the proposed configuration a hybrid system including series and shunt active line ...

Power gating technique reduces leakage power in the circuit. However, power gating leads to large voltage fluctuation on the power rail during power gating mode to active mode due to the package inductance in the Printed Circuit Board. This voltage fluctuation may cause unwanted transitions in neighboring circuits. In this work, a power gating architecture is developed for minimizing power in a...

This paper proposes a Flexible Power Electronic Transformer (FPET) for the application in the micro-grids. The low frequency transformer is usually used at the Point of Common Coupling (PCC) to connect the low voltage grid and utility network to each other. The conventional 50Hz transformer results in enhanced low voltage-grid power management system during grid-connected operation. In this pap...

H Alaei M Hoseini M.R SHarifi R Ataei

Introduction:Exercise and physical activity are important factors for human health.It has been reported that exercise can be considerably useful in the teratment of psychological diseases.in the present study the effect of running on Spontaneous Electroencephalographic Activity (EEG) of rats was investigated.   Method:Male wistar rats weighting 190-250 gr were selected and divided into contro...

Journal: :Energies 2022

Owing to the increasing penetration level of distributed energy resources (DER) and direct current (DC) load, usage low-voltage (LVDC) systems has expanded achieve efficient operations. However, because LVDC system reaches peak fault at a faster rate than alternating (AC) system, solution that protects components is necessary maintain integrity. It required by ride-through (LVRT) DERs their int...

2007
Kiyoo Itoh Masashi Horiguchi Hitoshi Tanaka

In undergoing this life, many people always try to do and get the best. New knowledge, experience, lesson, and everything that can improve the life will be done. However, many people sometimes feel confused to get those things. Feeling the limited of experience and sources to be better is one of the lacks to own. However, there is a very simple thing that can be done. This is what your teacher ...

پایان نامه :دانشگاه آزاد اسلامی واحد علوم پزشکی تهران - دانشکده پزشکی 1389

هدف : هدف از این پایان نامه بررسی تغییرات الکترورتینوگرام در بیماران مبتلا به گلوکوم است . زیرا گلوکوم بیماری است که اگر دیر تشخیص داده شود یا درمان نشود منجر به کوری می شود . روش مطالعه : این مطالعه یک مطالعه مشاهده ای – توصیفی – تحلیلی – مقطعی طراحی شده که نمونه شامل 25 فرد مبتلا به گلوکوم و 25 فرد سالم بوده است نمونه ها بصورت تصادفی ساده از بین مراجعین به بیمارستان های آموزشی دانشگاه آزا...

Photovoltaic systems (PVs), despite their many advantages, may have effects such as power quality issues (voltage and harmonics increase), short-circuits level increase, protection issues, and transient stability for network. Some of these effects are due to the high PV penetration, which encounters the network with the over-voltage and harmonics problems. In this paper, the location, size and ...

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