NYISO cancels interconnection for 20-MW battery project

With a utility-scale battery storage project now being moved, the New York Independent System Operator (NYISO) on Aug. 13 filed with the Federal Energy Regulatory Commission a notice of cancellation of an amended and restated small generator interconnection agreement (SGIA).

The agreement had been among the NYISO, New York State Electric & Gas (NYSEG) as the connecting transmission owner, and AES ES Westover LLC as the interconnection customer.

The Amended SGIA superseded an original SGIA among the parties that was accepted by the commission in February 2011. The original agreement stated that Westover was constructing a 20-MW battery-based energy storage system that would be located in the footprint of the retired Unit 7 at the existing and now fully-retired Westover Generating Station coal plant owned by AEE2 LLC in Union, N.Y. The original agreement provided that the facility would consist of ten 2-MW battery/inverter units interconnecting at NYSEG’s Goudey Substation.

The original agreement anticipated that the facility would initially consist of two 4-MW modules in Phase I for a total of 8 MW, to be in operation in December 2010. It also provided for a Phase II, described as the addition of three 4-MW modules for an additional 12 MW, to be in operation in April 2011.

After execution of the original agreement, the ownership of certain interconnection facilities was transferred to NYSEG as part of a Chapter 11 bankruptcy proceeding Westover was obligated, at its sole cost and expense, to remove certain interconnection facilities from the Westover Generating Station to a new building to be constructed by Westover on property that it owns. Westover was also required to perform certain work related to the relocation of these facilities. As a result of these developments, the Parties amended the original agreement. The amended SGIA was executed in December 2012 and was submitted to the commission on Jan. 22.

Westover provided a July 22 letter to the NYISO and NYSEG requesting termination of the amended SGIA. The letter doesn’t say why the termination is being done.

Battery project being moved to Ohio

DPL Energy LLC (DPLE) told FERC on June 21 that a battery storage system being installed at its gas-fired Tait peaking plant in Ohio is being transferred from the Westover power plant site in New York. DPLE filed a jurisdictional service agreement with FERC on June 21. Also, a lease agreement by and between DPLE and AES ES Tait LLC dated as of May 21.

The parties to the lease agreement, DPLE and AES ES Tait, are both indirect, wholly owned subsidiaries of AES Corp. (NYSE: AES). AES ES Tait is a wholly owned subsidiary of AES Energy Storage LLC and the successor to AES ES Westover LLC. 

“Beginning in August 2013, AES ES Tait plans to offer regulation service into the PJM market from a 20 MW battery-based energy storage project (the ‘Tait Battery Project’) at the site of the Tait Electric Generating Station (‘Tait Station’) in Dayton, Ohio,” DPLE wrote in the FERC filing. “The Tait Battery Project consists of an advanced lithium-ion battery storage system using ten inverter/battery containers. The battery storage system has recently been relocated to the Tait Station and was previously installed and operated by AES ES Westover at the site of the (now-retired) Westover Generating Station in the balancing authority area of the New York Independent System Operator, Inc.”

The advanced battery storage system used in the Tait Battery Project is capable of responding to automatic generation control signals within milliseconds as compared to much greater lagging response times for conventional generation sources.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.