In the transitioning power system, barriers are falling between renewables and traditional fossil and nuclear generation and between types of variable generation like wind and solar.
The energy infrastructure proposals from the Biden administration, if approved by Congress, are likely to accelerate the growth of utility-scale wind, solar and storage detailed by a December 2020 data compilation from Department of Energy (DOE) researchers. As variable renewables reach even higher penetrations and reliance on less cost-competitive natural gas fades, new solutions already in the works will assure reliability, power system analysts said.
Combined, utility-scale wind and utility-scale solar were “58% of all new U.S. generation capacity over the past six years,” said Research Scientist Mark Bolinger of DOE’s Lawrence Berkeley National Laboratory (LBNL). LBNL’s presentation of where the two resources have reached or can reach higher penetrations shows regulators and utilities how to plan “more-realistic portfolios” for their regions to meet Biden administration goals, Bolinger said.
The LBNL data reflects a transition “to an era where we need to assemble portfolios of resources into tradable energy products” that can be dispatched as predictably as traditional generation, Energy Innovation Senior Fellow Eric Gimon said. “There may not be one perfect way to bring this portfolio concept into markets, but we need to learn how to do it” to make clean energy viable and reliable in the energy marketplace.
Regulators, system operators, utilities and the private sector are starting to develop ways to reliably integrate the rising penetrations of variable renewables with flexible distributed energy resources (DER) to increase reliability, Bolinger and Gimon agreed. But the smart 21st century transmission and distribution (T&D) system and policy strategies the new power system will need to optimize this resource transformation are still in the works, stakeholders said.