AES transfers battery storage system from New York to Ohio

DPL Energy LLC (DPLE) told the Federal Energy Regulatory Commission 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 is a global energy company that owns and operates about 16,000 MW of competitive and regulated generation in the United States through a number of merchant generation subsidiaries and two traditional regulated utility subsidiaries.

DPLE owns and operates merchant generation facilities with an installed capacity of about 556 MW, all of which are capacity resources of and interconnected with the transmission system controlled by PJM Interconnection. DPLE is a wholly owned subsidiary of DPL Inc., a diversified energy holding company, which is also the parent company of The Dayton Power and Light (DP&L), a regulated provider of retail electric service to customers in Ohio.

AES ES Tait is a wholly owned subsidiary of AES Energy Storage LLC and the successor to AES ES Westover LLC. AES ES Westover was granted market-based rate authorization by the commission in a prior docket.

“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 Tait Station includes four gas-fired combustion turbines owned by DPLE and three combustion turbines and several small internal combustion engines owned by DP&L, all of which are interconnected with the PJM grid through the DP&L transmission system.”

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.

The Westover Generating Station was previously owned by AEE2 LLC, a wholly-owned, indirect subsidiary of AES, which leased property and interconnection facilities to AES ES Westover to install and operate the battery storage system. The Westover Generating Station was a while back sold as part of the reorganization of AEE2 in bankruptcy. AEE2 has terminated its business operations and cancelled its jurisdictional agreements, the filing noted.

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.