Case Studies

  • AES Energy Storage Angamos Battery Energy Storage System (BESS)

    In 2011, AES Gener, in cooperation with its subsidiary Empresa Eléctrica Angamos, completed construction on a 544MW thermal power plant in the town of Mejillones in Northern Chile. The plant provides electricity to this important mining region.

  • Capturing the Multi-Faceted Value of Energy Storage - S&C Electric Company

    In late 2014, Minster executed a power purchase agreement with Half Moon Ventures for the supply of power from a new 4.2-MW photovoltaic solar facility. The project goal was to expand the city’s electrical department’s footprint in renewable energy and provide cost-effective power. During design of the photovoltaic plant, Half Moon Ventures recommended expanding the project scope to include energy storage. For the inclusion of energy storage to make financial sense, the system had to capture multiple revenue streams.

  • Delivering 100% Commercial Reliability: AES Los Andes Battery Energy Storage System (BESS)

    AES Gener’s Los Andes substation is located in the Atacama Desert in Northern Chile and provides electricity to this important mining region. To ensure grid reliability against transmission or generation losses, power generators in the region each hold back capacity to meet system response for primary and secondary reserves. If an alternate solution could qualify to meet the critical grid reliability needs, then AES would be able to supply more needed energy generation to this important region of Chile.

  • Earning Revenue via Multiple Value Streams: Kaheawa Windfarm Dynamic Power Resource (DPR®) Energy Storage

    First Wind built a second phase to the Kaheawa Wind Project (KWP II) adding an incremental 21 MW of wind generation on the island of Maui on the Maui Electric Company’s 69 kV electric system. In order to mitigate the effects of wind volatility on an island grid, Xtreme Power designed a 10 MW Dynamic Power Resource® (DPR) to integrate with the 21 MW KWP II facility operating on a 80-200 MW grid. Wind development in high penetrations requires grid flexibility.

  • Energy Storage System Helps Aussie Utility Improve Rural Power Reliability

    Powercor, one of Australia’s largest utilities, faced a situation where customers along a rural powerline were experiencing poor reliability. These customers, located in Buninyong, a suburb of Ballarat in Victoria, experienced three 90-minute outages on average per year, resulting in lost revenue for local business and inconvenience for residential customers. Powercor decided to investigate energy storage as a possible solution to quickly increase reliability and network capacity instead of waiting for 2017 and 2019 to conduct capital upgrade works. The utility’s engineers believed an energy storage system could power the line from the battery during grid outages and peak-shave during times of high demand to reduce stress on the network’s assets.

  • Frequency Regulation Services and a Firm Wind Product: AES Energy Storage Laurel Mountain Battery Energy Storage (BESS)

    AES Laurel Mountain is a 98MW wind power generation plant located in Belington, WV that is built to supply more than 260,000MWh of renewable energy annually to the PJM Interconnection. However, since wind generation is variable, wind power plants are unable to supply capacity services to assist with grid reliability or earn additional revenue associated with those services like most other power plants.

  • Hawaii’s Big Island integrates renewable energy with Saft’s Li-ion technology

    Saft’s two lithium-ion (Li-ion) Intensium® Max 20E containerized energy storage systems (ESS) provide Hawaii Electric Light Company (HELCO) with the technology required for the Big Island to integrate an even greater amount of renewable resources with its grid. While the state of Hawaii is well placed to generate energy from natural sources, it historically has a high dependence on oil. It is targeting 40% of its energy to come from renewables by 2030, which it will achieve partly through intermittent sources such as solar and wind power.

  • Improving Grid Stability and Integrating Wind Energy: Younicos Battery Park

    Duke Energy is using Younicos controls technology to manage operations for a 36 megawatt Battery Energy Storage System (BESS) at the site of Duke Energy’s 153 MW Notrees wind farm in West Texas. The Notrees BESS, funded in part by a U.S. Department of Energy Smart Grid award, was constructed by Duke Energy in 2012, and is the largest wind-integrated storage resource in North America. The integrated facility at Notrees provides environmentally friendly and flexible capacity to the Electric Reliability Council of Texas (ERCOT), which operates the grid and manages about 75% of the deregulated market in the state. The BESS is in a 20,000-square-foot building adjacent to the wind farm substation. It is tied in at distribution-level to the wind farm’s 34.5kV system, and connects to the ERCOT grid through the same point of interconnect as the wind farm.

  • Increasing Revenues While Reducing Reserves: Younicos Battery Park

    The Maui Electric Company (MECO) owns and operates the electric grid and most of the generation assets on the island of Maui, Hawaii. The island has a peak load of 200 megawatt (MW) and a minimum load of 85 MW, with available firm generation of approximately 268 MW. Most of this generation is fueled by various forms of imported oil. Prior to 2012, the 30 MW Kaheawa Wind Power I (KWP I) project was the only operating wind farm on Maui. However, adding the KWP II (21 MW) and Auwahi (21 MW) wind farms in 2012 increased available wind power capacity to 72 MW, or 36 percent of the island’s peak demand.

  • Long-Duration Energy Storage on a Grid Scale: Highview Power Storage LAES

    Liquid Air Energy Storage (LAES) is sometimes referred to as Cryogenic Energy Storage (CES). The word “cryogenic” refers to a gas in a liquid state at very low temperatures. The working fluid is Liquefied Air or Liquid Nitrogen (78% of air). The systems share similar performance characteristics to pumped hydro and can harness industrial low-grade waste heat/waste cold from co-located processes, converting it to power. Size range extends from around 5MW/15MWh to >50MW/250MWh and with capacity and energy being de-coupled, the systems are very well suited to long duration applications.

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