Superior transmission applied sciences designed to maximise using present transmission traces may assist the US convey extra renewables capability on-line with out having to attend for brand spanking new grid infrastructure to be construct.
States resembling Kansas and Oklahoma may convey greater than double the wind and photo voltaic technology capability on-line that may very well be linked in any other case, in line with a examine cited by Jay Caspary, vp of Grid Methods, throughout a panel dialogue on the Clear Energy 2021 digital summit.
The 2 states presently have 9.2GW of wind within the transmission queue – initiatives that have already got an interconnection settlement — together with 260MW of photo voltaic. Kansas and Oklahoma have sturdy wind assets and enormous present wind fleets — 7.3GW and 9.6GW respectively, in line with Windpower Intelligence, the info arm of Windpower Month-to-month.
General, Caspary mentioned that three applied sciences — superior energy stream management, dynamic line scores and topology optimisation — may allow the area to combine an extra 5.2GW of wind and photo voltaic capability.
The report, a case examine of how grid-enhancing applied sciences (GETs) may unlock the grid within the Southwest Energy Pool space, was performed the Brattle Group for the Watt Coalition, of which Grid Methods is a member.
The US’s Federal Vitality Regulatory Fee (FERC) is planning discussions later this yr to think about incentives to advertise using GETs, together with dynamic line ranking (DLR), which permits transmission traces to hold extra capability by calculating scores based mostly on real-time measurements of line temperature, wind velocity, rigidity and sag somewhat than counting on fastened, worst-case assumptions. DLR has already been deployed worldwide and in pilot initiatives in a number of US transmission areas, together with PJM, New York, Colorado, Minnesota and Texas.
Nationally, using GETs may ship carbon emissions cuts equal to taking 20 million vehicles off the highway, Caspary mentioned. Greater than $5 billion in yearly manufacturing value financial savings may very well be achieved throughout the US. Regionally, the annual advantages for Kansas and Oklahoma, in line with the report, embrace $175 million in manufacturing prices financial savings and avoiding 3 million tonnes of emissions.
Terron Hill, director for US transmission asset improvement and coverage at Nationwide Grid, advised the summit that the utility is piloting GETs in New England. Their deployment is a boon given the aggressiveness of the area’s renewables targets, he defined, and contemplating that New England is densely populated with scant inexperienced area and minimal room for brand spanking new transmission proper of how.
Amanda King, director of strategic transmission planning at Minneapolis-based Xcel Vitality, mentioned her utility has analysed GETs and projected that they might provide a 10-20% enchancment in renewables interconnections.
A 500MW wind undertaking may save $80 million and 5 to seven years in improvement time by utilizing grid-enhancing applied sciences, prompt Mark Freyman, normal supervisor for the Americas at GET specialist Good Wires. “There’s a clock ticking — these applied sciences could be a bridge whereas we’re constructing out the transmission we want,” he mentioned.