Sunday, March 6, 2011

CrazyEngineers Forum - Electrical & Electronics Engineering

CrazyEngineers Forum - Electrical & Electronics Engineering

Wind Turbine in Digsilent

Posted: 06 Mar 2011 01:47 AM PST

Hi,

I have implemented a wind farm in Digsilent Power Factory, and now Ι am trying to run some simulations and see how the output power generated from the wind farm, varies dynamically with the wind speed.
More specifically, Ι am running a DPL script, which reads the wind speed data for 24 hours (every 15 minutes for a whole day) from an excel file, and for each wind speed value, a power flow calculation is executed. The wind farm output power, changes as expected every 15 minutes according to the wind speed, but the simulation plot output (wind farm output power vs time), shows only the plot corresponding to the last calculated value of output power. Is there any way to create a dynamic plot and see how the output power changes for the whole day? In other words, how can I plot each value at each time interval, without effectively being replaced by the next value before it is plotted?

Thanks for your time.

Ferrite Bead

Posted: 05 Mar 2011 09:29 PM PST

Hi all,

I always wondered about the small cylindrical shaped thing in the end of laptop charging cable, mouse/keyboard cable etc...I thought it would be for some protection or something. Dint had much idea on that. Last day i just googled about it and got the answer finally..Just sharing the info here..For those who dont know what its all about..



A ferrite bead is a passive electric component used to suppress high frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ the mechanism of high dissipation of high frequency currents in a ferrite to build high frequency noise suppression devices. Ferrite beads may also be called ferrite blocks, ferrite cores, ferrite rings, ferrite EMI filters, ferrite chokes. Ferrite beads are used (in a way similar to inductors) as a passive low-pass filter. The geometry and electromagnetic properties of coiled wire over the ferrite bead result in a high resistive impedance (resistance) for high-frequency signals, attenuating high frequency EMI/RFI electronic noise. The energy is either reflected back up the cable, or absorbed resistively within the ferrite core and dissipated as low level heat. Only in extreme cases will the heat be noticeable.


For more info, just go to wikipedia and search for ferrite bead

Thanks,
Rohit
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