CARMEL, Ind. — MISO plans to hold a final Order 841 workshop on Oct. 10 to complete its collection of stakeholder opinions on its storage participation model, which will include an agreement for distribution-level storage but leave storage dispatch optimization to a later filing.
Here’s what the RTO has decided thus far.
Pro Forma for Distribution-connected Storage
MISO’s draft pro forma agreement for storage connected at the distribution level requires storage:
- Be registered and modeled in MISO;
- Secure agreements with distribution facilities so energy can be delivered to the MISO transmission system;
- Be able to receive MISO operating instructions; and
- Provide MISO with facility measurements and settlement meter data.
The agreement also specifies that MISO will make sure a storage resource owner isn’t charged twice for energy when it pays retail rates for wholesale charging. MISO said it will exclude the charging energy from wholesale rates in its settlements.
During a Sept. 13 Market Subcommittee meeting, Coalition of Midwest Power Producers CEO Mark Volpe asked if the agreement opens an avenue for distribution-connected storage assets to avoid MISO’s interconnection queue.
“This is not a way to circumvent the interconnection queue,” Director of Market Design Kevin Vannoy said.
“So you’re saying that distribution-level storage must go through the interconnection queue?” Volpe asked.
“I don’t have a definitive answer for that,” Vannoy responded.
Consumers Energy’s Jeff Beattie pointed out that many qualifying facilities that utilities must purchase power from under the Public Utility Regulatory Policies Act are connected at the distribution level.
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