The Pterra Blog

Solar Photovoltaic Inverters and Ride-Through Capability

Administrator — Tue, 07 Feb 2012 17:41:42 +0000

In study after study, we (Pterra) are encountering this seemingly mounting issue of ride-through capability in solar photovoltaic ("PV") inverters. For now, the matter is isolated to frequency...

Can wind turbines and solar inverters contribute to frequency control?

Administrator — Mon, 06 Feb 2012 20:00:15 +0000

Renewable energy resources such as solar and wind, produce power in a manner that generally does not contribute to frequency control of interconnected power systems. However, both wind turbines and...

Administrator — Tue, 03 Jan 2012 16:32:03 +0000

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Integrating Solar PV Power with Existing Distribution Circuits; Part 1

Administrator — Thu, 29 Dec 2011 21:55:03 +0000

A wave of new solar photovoltaic (“PV”) installations for power generation is hitting many distribution circuits around the country. These installations are typically in the range of...

Transient Overvoltages in Wind Farms, and a Case Study

Administrator — Mon, 19 Dec 2011 20:51:26 +0000

In various Blogs on this site, we have talked about unique technical issues associated with integrating wind farms into existing grids. This Blog now addresses the matter of transient overvoltages,...

Transmission bases for sizing wind and solar projects

Administrator — Tue, 18 Oct 2011 15:41:31 +0000

Unlike base load power plants such as nuclear and some coal plants which operate near full capacity for days at a time, solar photovoltaic (PV) and wind farms are variable resources whose output is...

Training Schedules for Generation X

Administrator — Tue, 23 Aug 2011 18:51:27 +0000

Pterra conducts training in power technology subjects, not as a primary line, but in response to a perceived need. Occasionally, work in analytical consulting leads to knowledge and skills that...

An Anniversary

Administrator — Thu, 30 Jun 2011 19:34:57 +0000

Yesterday was the 7th anniversary of the founding of Pterra, LLC. The original team of 5 who started this journey remain, with some worthy additions. All have grown somewhat older, hopefully wiser,...

Report from the 2011 PSLF Users’ Group Meeting

Administrator — Mon, 09 May 2011 17:53:44 +0000

by Ric Austria If only for this one new feature, the trip to attend the meeting (held April 28-29 in sunny Orlando, Florida) was worth it. The new feature is … PSLF now allows...

Two Conferences in April and May 2011

Administrator — Fri, 08 Apr 2011 17:55:12 +0000

In the coming weeks, we are looking forward to participating in two conferences. Both are related to the power industry albeit in vastly different aspects. The first conference is the 2011 GE-PSLF...