Search results for: “power factor”
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Power generation: sensitivity to high-temperature heatwaves?
This data-file aims to provide a simple model for how generally well-covered grids can fail catastrophically during a heatwave. We have drawn on technical papers to quantify the deterioration of solar, gas, transmission and distribution losses, wind and other generation sources at higher temperatures.
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Renewables: share of global energy and electricity by country?
This data-file is an Excel “visualizer” for some of the key headline metrics in global energy: such as total global energy use, electricity generation by source and growing renewables penetration; broken down country-by-country, and showing how these metrics have changed over time.
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Sentient Energy: smart grid breakthrough?
This data-file is a technology review for Sentient Energy, assessing innovations in smart grids. Its technology can achieve energy savings via a combination of “Conservation Voltage Reduction” and “Volt-VAR optimization at the grid edge”. This also helps to integrate more solar and EV charging into power grids. We explain the technology.
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Power transmission: the economics?
This data-file captures the costs of AC power transmission, requiring a 1.5c/kWh spread to earn a 10% levered IRR on a new 100km and 1,000MW transmission line, with capex costs of $1.5/kW-km. These numbers are supported by backup tabs, tabulating the costs of recent projects and a full granular breakdown for the capex costs of…
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Peak power demand by region (and case studies)
This data-file tracks the timing and magnitude of peak power demand, across different grids in the North Hemisphere, with case studies. This matters for grid-planning, gas peakers and batteries. In the US, peak demand is typically driven by high AC loads in summer heatwaves. In Europe’s milder climate, only c10% of homes have AC, and…
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Power electronics: market size in energy transition?
We describe c15 problems incurred by industrial and commercial power consumers. Many will require additional investment as renewables replace the large rotating generators of traditional power grids. Hence we see the market for commercial and industrial power electronics trebling from $360bn pa in 2021 to $1trn pa by 2035.
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Power grids: global investment?
Global investment into power networks averaged $280bn per annum in 2015-20, of which two-thirds was for distribution and one-third was for transmission. Amazingly, these numbers step up to $600bn in 2030, >$1trn in the 2040s and can be as large as all primary energy investment.
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Goldwind: frequency response from wind turbines?
Goldwind is one of the largest wind turbine manufacturers in the world, headquartered in Beijing, and shares are publicly listed. The wind industry is increasingly aiming to mimic the inertia and frequency responses of synchronous power generators. Goldwind has published some interesting case studies. Hence we have reviewed its patents to see if we can…
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Duck curves: US power price duckiness over time?
In solar-heavy grids, power prices trough around mid-day, then ramp up rapidly as the sunset. This price distribution over time is known as the duck curve. US power prices are getting 25-30% more ducky each year, based on some forms of measurement. Power prices are clearly linked to the instantaneous share of wind/solar in grids.
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Wind power: operating costs?
Opex for a wind power project is typically $40/kW-year, or around 1-2c/kWh. Around $25/kW is maintenance, suggesting the wind maintenance market is now worth >$20bn per year. The best route to lower cost is up-scaling turbines and wind assets.
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