June 26, 2020: New York State’s grid operator, NYISO, has set the most aggressive clean energy mandates in America, according to its CEO Richard Dewey in his introduction to the Power Trends 2020: The Vision for a Greener Grid report, released in early June.
“The importance of a reliable grid electric system has never been more apparent,” he says. “Looking forward, chief among our priorities are the steps necessary to prepare for the grid of the future… There is no precedent for the level of change needed to meet these objectives.
“2020 has proven to be a year unlike any other in recent memory. Through these challenges, the NYISO remains committed to engaging stakeholders, market participants, policymakers and the public to support an electric system that is reliable, efficient, affordable and clean.
“The NYISO firmly believes that it must continue to enhance the benefits of its wholesale markets and system planning while maintaining grid reliability for New York’s electric energy consumers.”
What the report refers to as Energy Storage Resources, including batteries, flywheels, capacitors, vehicle-to-grid, thermal, pumped hydro and compressed air storage, are listed in the NYISO’s ‘Market Enhancement Opportunities’, along with carbon pricing, enhancing energy and ancillary services, and distributed energy resources.
“In 2018, the NYISO developed market rules for integration of energy storage resources in wholesale markets,” says the report. “FERC [the Federal Energy Regulatory Commission] accepted these rules, which are expected to be implemented this year. Following the success of its energy storage resource design, the NYISO is exploring Hybrid Storage Resource market participation options (for co-locating energy storage resources next to power generation sources).
“The ESR participation model will allow storage resources to self-manage their energy levels or use the NYISO’s energy level monitoring capabilities.
“The option of relying on the NYISO’s capabilities to monitor and manage energy storage levels is intended to optimize storage resource availability for periods when they can best support bulk power system reliability.”
The NYISO says it is working with stakeholders to create innovative rules for integrating energy storage technology and DERs onto the grid, including limited ESRs that can provide capacity to the grid for two hours.
The only kind of batteries specified in the report, however, are lithium batteries — no other chemistries are mentioned.
But only specifying lithium is short-sighted, says the Consortium for Battery Innovation. “There are numerous examples of highly effective energy storage projects worldwide, using advanced lead batteries, and we list many on our website. We are launching a battery matching tool online later in the year that will help system specifiers do just that — match the best lead batteries to their energy storage requirements,” said CBI director Alistair Davidson.
Under the state’s 2019 Climate Leadership and Community Protection Act, 70% of electricity generated must be from renewable sources by 2030. It also requires 6GW of solar energy by 2025, 9GW of wind energy by 2035, and 3GWh of storage, according to Jason Doling, assistant director of the DER team with the New York State Energy Research and Development Agency.
Doling said NYSERDA was technology agnostic, and other battery technologies are being considered.
“The R&D side of NYSERDA has an interest in funding non-lithium technologies because lithium is good for four to six hours’ duration but if it’s more than eight hours it becomes cost prohibitive. That’s where other battery technologies become more attractive,” he said.
The NYISO says it has implemented a quarterly ‘Short-Term Reliability Planning’ process to assess more accurately system reliability over the next five years, “to identify potential adverse reliability impacts associated with new resources entering operation”.
“If studies identify any reliability issues, this interconnection study process identifies upgrades and their estimated costs to allow the resource to interconnect reliably,” it says.
“Combined with additional reforms, this new interconnection process will provide developers with more frequent opportunities and flexibility to obtain certainty over their interconnection costs and obligations and subsequently accelerate the interconnection of renewable and other new resources on to the grid.”