The more efficient a distribution grid is, the less likely other potential supply bottlenecks (from lithium for batteries to trained electricians) will slow the transition to greater and greater electrification. State-of-the-art modelling of future grids is already happening, but the robust modelling of the distribution system is conspicuously missing because good data are notoriously hard to find, says Meredith Fowlie at UC Berkeley’s Energy … [Read more...]
Replacing centralised power with Distributed Energy Systems needs new policies and coordination
We need integrated resilient smart grids that can accommodate the rapid growth of intermittent renewables as well as the rise of “prosumers” who both buy and sell electricity into the grid. This is the focus of three online discussion sessions on February 8th, 9th and 10th organised and hosted by power management company Eaton. The proliferation of multiple generation sources (solar, wind, batteries and other clean, flexible technologies) means … [Read more...]
Can full-scale Distributed Solar really save $473bn in grid investments?
A giant model of the entire US electricity sector which captures distributed energy resource (DER) potential has been getting a lot of attention. It estimates that distributed solar and storage can save $473bn in system-wide costs when deployed at scale (enough to power more than 25% of US homes). Rooftop solar is definitely much more expensive than grid generation, but its location (on your own roof) avoids a range of costly transmission and … [Read more...]
Solar is displacing Coal in India’s electricity market
India is the world’s third largest electricity market and as a fast-growing economy can, according to the IEA, lead the recovery of global energy demand out of the pandemic for the coming decade. Kashish Shah at IEEFA runs through solar’s prospects in India, which hopes to build 450GW of renewable energy by 2030. Solar is getting cheaper. A 2GW auction in June delivered India’s lowest-yet renewable energy tariff at US$31/MWh. That figure could … [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...]
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 “avoided costs”. He shows that any savings won’t come even close to making up for the higher cost of rooftop electricity. It’s no match for the grid’s … [Read more...]
The new era of electricity needs modern ways to charge customers
Today’s technologies – wind, solar, storage - have widely differing cost and operating characteristics to fossil fuels. So the way customers are made to cover those costs – assigning different rates to different customer classes – should change. Jim Lazar and Mark LeBel at RAP explain why and how, referencing their comprehensive manual “Electric Cost Allocation for a New Era”. They describe how the full range of technologies now establishing … [Read more...]
Ukraine’s integration into the EU gas market is a positive lesson for the region
Ukraine is shaping its gas infrastructure and regulations to integrate into the EU market. On the infrastructure front, its interconnectors with neighbours, extensive pipeline network and storage facilities are making it an increasingly important European player, explains Aura Sabadus writing for the Atlantic Council. The gradual opening up to EU free market rules are evidenced by its gas prices following those of the EU. Ukraine's attractive … [Read more...]
California fires and blackouts: would non-profit utilities be more reliable, safer, cheaper?
The wildfires in California ignited by poorly maintained transmission lines have themselves ignited a debate about whether the guilty - and now bankrupt - energy utility PG&E (the largest in the state) should now become publicly owned. That in turn has led Severin Borenstein at the Energy Institute at Haas to consider the pros and cons of public v private in this vital activity. The first thing to note is that electricity transmission and … [Read more...]
Online condition monitoring: making sense of sensors in the age of the Smart Grid
Grid operators across Europe are experiencing higher maintenance and reinforcement costs than ever before and, without significant increases in funding, are realising that they must fundamentally change the way that their assets are operated, maintained and replaced. This means running assets closer to their operational limits, performing predictive rather than corrective maintenance and replacing assets as close to the end of their useful life … [Read more...]
