Author Archives: admin

High Voltage Concern at Wind Farms?

Posted on May 18, 2010 by admin

If we think about wind turbines as induction generators, one would assume that these would be VAR (reactive power) sinks, demanding vars from the grid to be able to deliver watts.  However, that may be true from the point of … Continue reading →

Posted in Tech Blogs, Wind Power Integration | Tagged , , , , , , , | 1 Comment

Voltage Stability Course – April 2010

Posted on April 22, 2010 by admin

Held in Albany, NY We had a full class, with active participants.  It was fun to teach and hopefully it was also fun to have been a participant in the course!  The participants gave an overall rating for the course of 4.86 out of a possible … Continue reading →

Posted in Training Courses | Tagged , , , , , , , , , | 1 Comment

HVDC Technology: When 2,000 MW is 2,000-Plus-1,200 MW

Posted on March 10, 2010 by admin

  by Pterra Consulting   In this Blog, we discuss the amazing story of how a lowly 2,000 MW HVDC line was able to support a transmission capacity increase of 3,200 MW.  Read on …

Posted in Direct-Current (HVDC) Transmission, Tech Blogs | Tagged , , , , , , , , , , | Leave a comment

Updated Pterra Training Course Schedule for Spring 2010

Posted on January 13, 2010 by admin

Here is the updated schedule for power systems analysis courses for Spring 2010.  All courses are to be held at the Pterra Training Facility in Albany, New York.  April 20-22, 2010 – Voltage Stability Analysis and Applications Course May 11-13, 2010 – HVDC Transmission … Continue reading →

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Power Flow Solution Techniques

Posted on November 23, 2009 by admin

by M. Gutierrez, M. Elfayoumy, R. Tapia, R. Austria (This Blog is an introductory discussion of the AC power flow at a beginner level.  Other Blogs on this site discuss more advanced aspects of the power flow, including convergence and … Continue reading →

Posted in Power Flow Analysis | Tagged , , , , , , , , , | 1 Comment

HVDC Transmission Analysis and Applications Course

Posted on November 16, 2009 by admin

Held Nov 10-12, 2009 in Albany, New York   Brave souls from the West Coast came to balmy upstate New York for this course held at the Pterra Training room.  When we held this course last year, we had good folks … Continue reading →

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HVDC Technology: DC Overlay on an AC System

Posted on November 2, 2009 by admin

by R. Austria, K. Dartawan, M. Elfayoumy, M. Gutierrez, R. Tapia “Will a 2,000 MW HVDC line transfer 2,000 MW?” The answer, which we’ll try to explain in this blog, is “plus or minus“ if the DC line is being built to … Continue reading →

Posted in Direct-Current (HVDC) Transmission | Tagged , , , | 2 Comments

Converging the Power Flow 3: Mitigation

Posted on October 30, 2009 by admin

by R. Austria  A power flow that doesn’t converge is annoying, to say the least.  For one, any information you try to use from a non-convergent solution is moot and questionable (recall that a power flow is a solution of a set of equations … Continue reading →

Posted in Power Flow Analysis | Tagged , , , , | 1 Comment

Wind Farm Integration: Analytical Requirements

Posted on October 26, 2009 by admin

  Wind Farm by Pterra Consulting Whereas, power plants using renewable energy sources were not too long ago considered exotic, today they are the new face of energy — the wind mill replacing the smokestack as the symbol of electric … Continue reading →

Posted in Wind Power Integration | Tagged , , , , , , , , , , | 2 Comments

Voltage Stability: The Voltage Ledge Seen Close-Up

Posted on October 14, 2009 by admin

by R. Austria Conventional wisdom says that the more motors connected to a feeder, the faster voltage will collapse when there is a reactive deficiency.  This is true to the extent that voltages do drop faster, but the voltage may … Continue reading →

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