نتایج جستجو برای: lvrt capability

تعداد نتایج: 90536  

2017
Cheng Zhong Gangui Yan

Abstract: Fast control DC-link voltage is the key to enhance Low-Voltage Ride-Through (LVRT) for the Permanent Magnet Synchronous Generator (PMSG). When grid voltage dips deeply, by the constraint of the capacity of the grid-side converter and reactive power support by the grid-code required, the active power capacity of the grid-side converter will be reduced. Therefore, it cannot stabilize th...

Journal: :International Journal of Computer and Electrical Engineering 2009

امروزه بهره­ برداری از ژنراتور دو سو تغذیه در نیروگاه ­های بادی در حال گسترش می­ باشد، علت این امر راندمان بالای آن­ها نسبت به سایر ژنراتورها و انعطاف ­پذیری­ شان در کنترل توان­های اکتیو و راکتیو می­ باشد. یکی از مهم­ترین موضوعات در توربین­های بادی مجهز به ژنراتور القایی دو سو تغذیه (DFIG)، قابلیت عبور از ولتاژ پایین (LVRT) در هنگام وقوع خطا یا افت ولتاژ ناگهانی شبکه می ­باشد. نیاز LVRT به­ منظ...

Journal: :بین المللی مهندسی صنایع و مدیریت تولید 0
hamideh razavi adeleh asadzadeh zohreh naseri

in many applications the quality of a process or product is best characterized and summarized by a functional relationship between a response variable and one or more explanatory variables. profile monitoring is used to understand and to check the stability of this relationship over time. therefore checking the capability of a profile seems essential. process capability indices have become very...

2016
Rahmat Khezri Hassan Bevrani

Introduction Widespread development in utilizing renewable energy resources such as solar, marine, biomass, geothermal and wind for electricity generation is become inescapable newly. Wind energy has the most contribution for power generation among different renewable energy resources; this is so because of its potential advantageous such as free availability of wind, ability to exploit in high...

2013
Alexander A. Neff Florian Hamel Thomas Herz Falk Uebernickel Walter Brenner

The constantly rising fraction of industrial services reveals the structural economic change that is changing the manufacturing industry landscape. Manufacturing firms have more and more problems to find the appropriate information technology (IT) solution for planning and execution as they are confronted with the strategic challenge of reducing operating costs while at the same time meeting ev...

2008
Sune Dueholm Müller Peter Axel Nielsen Morten Boldsen

The capability maturity model integration (CMMI) has become one of the most preferred approaches to software process improvement (SPI). However, the amount of discontinued or delayed CMMIdriven SPI projects is considerable. In this paper we investigate the culture embedded in the CMMI and compare it with the cultures within an implementing organization in Scandinavia by utilising the competing ...

Journal: :IJEBM 2014
Chung-Yang Chen Chun-Shuo Chen Xiang-Ting Wang

As information technologies evolve and demands of enterprises on larger data and integrated info services keep growing, the market of cloud services (CS) attracts many more players nowadays. However, the quality of the services may vary due to different service capabilities and a service often requires integration with other services, CS providers need a standard way in implementing and improvi...

2015
Bianca Trinkenreich Gleison Santos Monalessa Perini Barcellos

Background: Maturity models for IT service such as CMMI-SVC and MR-MPS-SV requires identification of critical business process and definition of relevant metrics to support decision making, but there is no clear direction or strict suggestion about which should be those processes and metrics. Aims: We aim to identify adequate metrics to be used by organizations deploying IT service maturity mod...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید