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Tag Archives: power flow
High Voltage Concern at Wind Farms?
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 control, interconnection, linkedin, power flow, voltage, wind, wind farm, wind power
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HVDC Technology: When 2,000 MW is 2,000-Plus-1,200 MW
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 CREZ, ERCOT, HVDC, interconnection, power flow, pterra, system impact, Texas, transmission, wind farm, wind power
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Updated Pterra Training Course Schedule for Spring 2010
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
Posted in Training Courses
Tagged convergence, courses, dynamics, HVDC, interconnection, LVRT, power flow, pslf, psse, pterra, seminar, transmission, wind farm, wind power
2 Comments
Power Flow Solution Techniques
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 convergence, linkedin, power flow, pslf, psse, pterra, transmission, voltage, wind farm, wind power
1 Comment
Converging the Power Flow 3: Mitigation
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
Wind Farm Integration: Analytical Requirements
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 interconnection, LVRT, power flow, pslf, psse, stability, system impact, transmission, wind, wind farm, wind power
3 Comments
Voltage Stability: The Voltage Ledge Seen Close-Up
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
Posted in Voltage Stability
Tagged induction, motors, power flow, pslf, psse, stability, transmission, voltage, voltage ledge
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Wind Farm Integration: On the Use of Agreggate Models
Here are the top 3 reasons a transmission analyst may need to avoid modeling each turbine and each cable in the wind farm for the interconnection study Continue reading
Posted in Wind Power Integration
Tagged convergence, power flow, pslf, psse, transmission, wind, wind farm, wind power
2 Comments
Spring 2010 Pterra Course Schedule
Following is the proposed course schedule 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 – Linear Power Flow Analysis and Applications Course. June 8-10, 2010 – Power Flow Analysis and Applications Course. June 15-17, 2010 – Applications in Wind Power Interconnection Course. For early birds, all the above courses are being offered at 2005 prices ($295 per seat). So sign up now at the Cvent registration site!
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Posted in Training Courses
Tagged convergence, courses, power flow, pslf, psse, pterra, seminar, stability, training, transmission, voltage, wind, wind farm, wind power
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Converging the Power Flow, Part 2
Reasons for divergence, and our explanations.
The power system is going to “blow-up.” — the term “blow-up” just applies to the numerical solution.
There is something wrong with the solution algorithm. — not the formulation but perhaps the implementation into computer code.
There is something wrong with the data. — yes, of course. The old concept – garbage in, garbage out.
There is something wrong with my computer. — do you have a 386?
The solution hit a bad iteration. — like hitting a crack in the pavement that breaks your differential and off goes the wheel! Not a bad analogy except that its much easier to do the bad iteration than it is to break the car.
We hit a bifurcation. — yes, after we exclude all the other simple reasons.
We hit a saddle-node bifurcation. — even better.
We hit the wall. — like, “this software is driving me crazy, I want to hit my head against the wall?” Continue reading
Posted in Power Flow Analysis
Tagged convergence, power flow, pslf, psse, pterra, transmission
1 Comment