By Andrew Mills and Joachim Seel, Berkeley Lab As solar generation increases, it is expected to progressively impact the bulk power systemâchanging prices for energy and other grid services. Solar generation is driven by sunshine and thus often highly correlated over the course of a day within a region. Without the deployment of storage or an increase in price-responsive load, growth in solar capacity is … [Read more...]
A marketplace for energy data will enable Europeâs grid expansion
The growth of the decentralisation of energy generation and storage combined with the digitalisation of the metrics of supply and demand is pointing towards a marketplace for energy data, explain Veronika SpurnĂĄ and Helena Uhde at the EU-China Energy Cooperation Platform. Such a marketplace will monetise the data itself, in recognition of its vital role in enabling the intelligent distribution of energy and investment. There will also be a place … [Read more...]
Policy-makers still undervalue Energy Efficiency as a grid resource
Supply-side solutions to grid stability are few in number, and expensive. More baseload generation, electricity networks, capacity markets that pay power plants all year round to be available for dispatch during a few peak hours. Demand-side solutions are usually smaller, and multitudinous: building fabric improvements, equipment upgrades, customer behaviour interventions, and more. So, for grid stability, the principle of âEfficiency Firstâ - … [Read more...]
Weâre making much more progress decarbonising Electricity than Transport. Why?
In the OECD, since 2000, electricity sector emissions have fallen by 8% while transport emissions have actually increased by 5%. The best performers like the UK recorded drops in both: 40% and 6% respectively. In the U.S. itâs 25% and 0%. Catherine Wolfram at the Haas School of Business asks why transport is still going in the wrong direction, given the power sectorâs progress. She posits three theories. Rich nations are outsourcing … [Read more...]
What effect will blending Hydrogen into the Natural Gas network have?
What are the technical barriers to blending hydrogen into the natural gas network? How well will the pipelines cope? How will the blend affect equipment and appliances? What are the costs and environmental impacts? The answers to these key questions are being sought by a collaboration of laboratories, industry and academia led by NREL, called HyBlend. The long-term impact of hydrogen on materials and equipment is still not understood. The effect … [Read more...]
The benefits of Peer-To-Peer Electricity Trading for communities and grid expansion
The adoption of peer-to-peer (P2P) electricity trading will turn individual consumers from passive to active managers of their networks. Such a marketplace can relieve constraints on the growing system and offer an alternative to costly grid reinforcements. Arina Anisie and Francisco Boshell at IRENA run through the benefits, including investment costs, bills, resilience, congestion, mini-grids, energy access, and more. They note that very few … [Read more...]
Rooftop Solar: economies of scale can challenge the centralised grid
One of our recent articles explained how rooftop solar PV is more expensive that a centralised supply, and that the transmission and distribution cost savings of the rooftop system, on their own, do not make up for this cost difference. Here, Javier LĂłpez Prol at the Wegener Center for Climate and Global Change, University of Graz, responds to those challenges. First, the economies of scale of distributed rooftop solar are yet to be realised. … [Read more...]
ELCC: how to measure grid stability as renewables are added
We cannot just swap 24/7 fossil fuel power plants for intermittent renewables. To prevent electricity shortfalls the capacity of a solar or wind plant must exceed that of the fossil fuel plant it replaces. But by how much? Thatâs the question that the Effective Load Carrying Capability (ELCC) metric is designed to answer. Itâs not a new concept, but is now becoming very important. Mark Specht at the Union of Concerned Scientists explains the … [Read more...]
Why promote Rooftop Solar when the Grid is so much cheaper?
Is rooftop solar in the U.S. getting more support than it deserves? One main argument from its advocates is that it will cut grid transmission and distribution costs that total hundreds of millions. Severin Borenstein at the Energy Institute at Haas crunches some numbers to try to uncover the true âavoided costsâ. He shows that any savings wonât come even close to making up for the higher cost of rooftop electricity. Itâs no match for the gridâs … [Read more...]
Swedenâs new âprosumersâ: electricity generation at the city, village and residential level
54% of Swedenâs power already comes from renewables â the target is 100% by 2040 - and more and more is being generated locally on a small distributed scale, says Harry Kretchmer writing for the World Economic Forum. âDistrict Heatingâ plants are today using excess heat to warm over 75% of Swedish homes. Residential generation is happening too, creating âprosumersâ who both produce and consume. In Ludivika, 1970s flats have been retrofitted with … [Read more...]
No more âoffsettingâ: Google commits to 24/7 locally sourced carbon-free electricity by 2030
By âoffsettingâ fossil electricity consumed at one data centre through buying green power from somewhere else, Google has been 100% renewable since 2017. But offsetting always has its flaws. In this case, 40% of Googleâs actual power still comes from fossil fuels. Googleâs new plan, to be 100% green 24/7 straight off the local grid, is designed to solve that. It will also send market signals to increase clean capacity locally, not just where you … [Read more...]
Grid scale Battery costs are declining faster than Wind and Solar
Gas as a transition fuel for grids may be around for a lot less time than we thought. We already know that large batteries, if they are cheap enough, can replace gas plants to provide peaking power to grids reliant on intermittent wind and solar. Bruce Robertson at IEEFA says the numbers are showing battery costs declining even more rapidly than wind and solar. Precisely because of that increased competitiveness Australiaâs AGL Energy is starting … [Read more...]
The new era of electricity needs modern ways to charge customers
Todayâs technologies â wind, solar, storage - have widely differing cost and operating characteristics to fossil fuels. So the way customers are made to cover those costs â assigning different rates to different customer classes â should change. Jim Lazar and Mark LeBel at RAP explain why and how, referencing their comprehensive manual âElectric Cost Allocation for a New Eraâ. They describe how the full range of technologies now establishing … [Read more...]
Sales down, but cash preserved too: Regulators take note when setting new Utility rates
Utilities are suffering financial impacts because of the current pandemic, and regulators will be asked to address them when they set new electricity rates. The intention will be to help the utilities recover while keeping bills affordable for their customers. But not all the impacts on the utilities are bad news, explains Jim Lazar at RAP looking at the U.S. Though revenues have dropped and some labour costs risen, there is a list of things that … [Read more...]
Virtual blockchain for prosumers replicates a live utility-scale grid
Wayne Hicks at NREL describes research thatâs created a virtual blockchain âprosumerâ accounting system that replicates a live utility-scale grid. The goal of a real-world application is to allow countless individual households with their own electricity storage and generation to buy and sell power to each other; a truly revolutionary pathway. Clearly, it will require a system that securely accounts for vast amounts of transactions - a big enough … [Read more...]
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