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- Solar Photovoltaic Inverters and Ride-Through Capability
- Can wind turbines and solar inverters contribute to frequency control?
- Integrating Solar PV Power with Existing Distribution Circuits; Part 1
- Transient Overvoltages in Wind Farms, and a Case Study
- Transmission bases for sizing wind and solar projects
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Author Archives: Administrator
Solar Photovoltaic Inverters and Ride-Through Capability
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 ride-through in small grids such as those that may be found in the Hawaiian islands. However, there is potential for this to be critical in even larger systems as the number of inverter-based PV arrays interconnecting to existing distribution and transmission systems increases. Continue reading
Can wind turbines and solar inverters contribute to frequency control?
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 solar inverters have the important characteristic of fast, programmable controls. The question then comes up: Is it possible for these power sources to participate in frequency control response of interconnections? Continue reading
Integrating Solar PV Power with Existing Distribution Circuits; Part 1
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 10-2000 kW and comprise of a set of solar PV arrays or trays … Continue reading
Posted in Photovoltaic Systems and Distributed Generation, Tech Blogs
Tagged DG, distributed generation, distribution, flicker, grounding, harmonics, interconnection, islanding, linkedin, Photovoltaic, power flow, protection coordination, pterra, PV, short circuit, solar, stability, system impact, tap cycling, training
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Transient Overvoltages in Wind Farms, and a Case Study
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, or TOV, specifically with respect to potential risks to customers … Continue reading
Posted in Photovoltaic Systems and Distributed Generation, Tech Blogs, Wind Power Integration
Tagged analysis, DG, distributed generation, distribution, EMTP, induction, interconnection, linkedin, Photovoltaic, PSCAD, short circuit, solar, solar farm, TOV, transient overvoltage, wind farm, wind power, windpower
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Transmission bases for sizing wind and solar projects
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 dependent on the minute-by-minute change in … Continue reading
Training Schedules for Generation X
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 clients and associates desire to acquire. And we are more … Continue reading
Posted in Training Courses
Tagged courses, distribution, dynamics, interconnection, linkedin, New York, power flow, pslf, pterra, short circuit, stability, system impact, training, transmission, voltage
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An Anniversary
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, and after all the contingencies encountered through the … Continue reading
Report from the 2011 PSLF Users’ Group Meeting
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 “continuous” tap solutions for phase angle … Continue reading
Posted in Industry News, Tech Blogs
Tagged distribution, GE, linkedin, Photovoltaic, power flow, pslf, psse, pterra, PV, solar, stability, transmission, wind, wind turbine, windpower
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Two Conferences in April and May 2011
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 User’s Conference, April 28-29 in Orlando, FL. General … Continue reading
Training Schedule
So … we’ve completed our first scheduled course for the year - Distributed Generation (DG) Analysis and Applications Course, and are gearing up for the next 3 months of classes. The DG class, of course, was a first-time course and reflects … Continue reading
Posted in Training Courses
Tagged collapse, courses, DG, distributed generation, distribution, flicker, harmonics, power flow, PV, training, underground cable, voltage, voltage sag, wind
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