Infrastructure of bulk electrical energy transfer.

• Anirban Ghosh

  Can anyone please tell me that how to measure power factor in a single phase connection?

  How to measure power factor in a single phase connection?
• Anirban Ghosh

  How do synchronous motors help in improving the power factor?

  Synchronous motors help in improving power factor, how?

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  • 
    Anirban Ghosh replied

    Thanks a lot...

    7 days ago
• Ankit Dalal

  Ansys maxwell

  How can I analyze sinusoidal amplitude and sinusoidal angle magnetised permanent magnets in ANSYS Maxwell?
• Suresh Sampath

  Phasor measurment unit

  i wil do the project for PMU hardware please post regards RTDS and WAN

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    Suresh Sampath replied

    Thanks for kind reply...i need the over all block diagram of the pmu circuit,,

    23 days ago
• Naga Raju

  What is "decoupling by state feedback system" and decomposition by state feedback system?

  What is "decoupling by state feedback system" and decomposition by state feedback system? ---control system
• Manohar Singh

  Relay coordination in distribution system in distributed power generation

  How can the coordination be made adaptive and self repairing?

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    Seifeddine Belfedhal replied

    The power electronic systems

    28 days ago
• John Bright

  To choose On-line Monitoring(High Voltage) or Electrical Engineering and Automation for my master major?

  I'll be a graduate, major in Electrical Engineering and Automation . I want to get a master degree. The question is i don't know which one is better, power system or high voltage. I need your help,I'll be a graduate, major in Electrical Engineering and Automation . I want to get a master degree. The question is i don't know which one is better, power system or high voltage. I need your help, thanks!

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    FELIX JR Sanbuenaventura replied

    Felix m.s.jr. - ch2m hill - veco engineering power system can be more usefull than choosing only the high voltage since nowadays the trend is towards energy efficiency and conservation andFelix m.s.jr. - ch2m hill - veco engineering power system can be more usefull than choosing only the high voltage since nowadays the trend is towards energy efficiency and conservation and environmentallly safe and friendly. So, you could choose power system of solar power energy conversion although this is only low voltage power application and not high voltage yet it is free and renewable.

    Apr 22, 2012
• xp li

  High Frequency Resistance loss and Simulation about a Litz-wire

  I'm doing a project about Litz-wire's high frequency resistance (Rac) loss, I want to get the full partial differential equations (PDE ) description about a litz-wire and do a finite element methodI'm doing a project about Litz-wire's high frequency resistance (Rac) loss, I want to get the full partial differential equations (PDE ) description about a litz-wire and do a finite element method simulation. Can anyone recommend some examples or details?

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    Ali Yazdimoghaddam replied

    To combat the skin effect, litz wire uses lots of little conductors (strands) in parallel (forming a bundle). Each little conductor is less than a skin-depth, so an individual strand does not sufferTo combat the skin effect, litz wire uses lots of little conductors (strands) in parallel (forming a bundle). Each little conductor is less than a skin-depth, so an individual strand does not suffer an appreciable skin effect loss. The strands must be insulated from each other -- otherwise all the wires in the bundle would short together, behave like a single large wire, and still have skin effect problems. Furthermore, the strands cannot occupy the same radial position in the bundle: the electromagnetic effects that cause the skin effect would still disrupt conduction. The bundle is constructed so the individual strands are on the outside of the bundle (and provides low resistance) for a time, but also reside in the interior of the bundle (where the EM field changes are the strongest and the resistance is higher). If each strand provides about the same average resistance, then each strand will contribute equally to the conduction of the entire cable. The weaving or twisting pattern of litz wire is designed so individual wires will reside for short intervals on the outside of cable and for short intervals on the inside of the cable. This allows the interior of the litz wire to contribute to the cable's

    Apr 19, 2012
• Sandeep Soni

  Hi friends. I want to do work on distributed FACTS controllers. Can anybody help me which FACTS controller is the best in performance & flexibility enhancement for transmission lines. Can anybodyHi friends. I want to do work on distributed FACTS controllers. Can anybody help me which FACTS controller is the best in performance & flexibility enhancement for transmission lines. Can anybody provide me any one MATLAB/simulink model of any type of D-FACTS controller.

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    Sandeep Soni replied

    Sir ,this is my M.Tech dissertation topic that's why ,i have to do it. If possible suggest me for related to this topic.

    Apr 12, 2012
• Mukendi Kalonji

  I am designing a HVDC system which must transmit 2 GW of power at 800KV over 500KM. The design must include 2 converting stations.

  What major aspects must be taken for the design of the towers, span length between towers, corona losses, electrical field between conductors, maximum loading, insulators, surge arresters, convertingWhat major aspects must be taken for the design of the towers, span length between towers, corona losses, electrical field between conductors, maximum loading, insulators, surge arresters, converting transformers?

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    AN Venkat replied

    dear scholar, it is welcoming idea, but it is an herculian task and you need tremendous amount of data and lot of expertise. you can take the help of the companies which erected the hvdc lines indear scholar, it is welcoming idea, but it is an herculian task and you need tremendous amount of data and lot of expertise. you can take the help of the companies which erected the hvdc lines in the bharath and experts in the hvdc, who are dealing the subject and publishing the papers.and you can contact the ABB personnel for the help(if they agree),because they erected the converter station for power grid at paravada visakha dist., andhra pradesh India,for the hvdc line from talcher to bangaluru. wish you all the best. with best regards, a.n.venkateswarlu,99480 38036, Associate Professor, Dept.,of Electrical and Electronics Engineering,Vignan's Lara Institute of Technology and Science, Vadlamudi, 522 213, Guntur Dist., Andhra Pradesh, India, email-id: anvvsp2000@gamil.com,anv_vsp2000@yahoo.co.in (a n v v s p)

    Apr 2, 2012
• Ihsan Udin

  Our customer need me to design MV Fire Resistance Cable. Is there anybody that can help me?

  Fire resistance Cable is very special cables which can be operated under fire condition for specific limited duration. Fire temperature normally between 750 C - 1000 C with duration from 90 minutesFire resistance Cable is very special cables which can be operated under fire condition for specific limited duration. Fire temperature normally between 750 C - 1000 C with duration from 90 minutes up to 180 munites.
• Somesh Bhattacharya

  Power flows

  When you are doing load flows, for a multi area system, can you consider more than one slack bus? Consider a fully practical system.

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    Somesh Bhattacharya replied

    So now, when we have two slack buses, how do we consider the reference angle for the other slack bus? Will it be 0 again, or will it depend on something else?

    Feb 25, 2012
• Satyendra Gupta

  What is scope for a Mathematics (M.Sc.) student in Fuzzy-Reliability Engineering (Power System Reliability)

  I want to know that- Is a Mathematics (M.Sc.) student can select Fuzzy-Reliability Engineering (Power System Reliability) as his research topic? If yes then, what is advantage and disadvantage?

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    Abdulbasid Ismail replied

    Actually, ican not say, but i don't know if you are good power system analyises, although i know that you need a single line diagramme of a given power system for wich you will do the study

    Feb 6, 2012
• Sathish Kumar

  how does the frequent start of VFD drive affects supply transformer?

  in this case large number of pump motors are controlled through VFD.all the VFDs gets supply from single transformer. so, how these affects the transformer performance, k factor while startingin this case large number of pump motors are controlled through VFD.all the VFDs gets supply from single transformer. so, how these affects the transformer performance, k factor while starting frequently?
• Anne ko

  What is active filter for motor control ?

  I want to know motor drive with no distortion.

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  • 
    Fernando Diaz replied

    You should look for the noises rate your motor can manage w/o damage and look for the right standard for that. With the standard reference in your hand you could select the right driver at the rightYou should look for the noises rate your motor can manage w/o damage and look for the right standard for that. With the standard reference in your hand you could select the right driver at the right price.

    Jan 9, 2012