ARENA SHOWCASE

HORNSDALE STAGE 2 ELECTRANET BATTERY FCAS TRIAL STORAGE PROJECT

Lead organisation: HWF2 Pty Ltd, Lead organisation: ElectraNet a subsidiary of Neoen ARENA funding: $12.0 million ARENA funding: $300,000 Total project cost: $30.0 million Total project cost: $600,000 Location: , SA Location: Hornsdale, SA The speed with which a battery can be switched The Musselroe project builds on the findings of on or off makes this form of energy storage an earlier project at South ’s Hornsdale an ideal way to help keep the grid secure by stage 2 wind farm, where ARENA partnered with providing renewables-based FCAS. AEMO to test the technical feasibility of wind farms providing a type of FCAS called inertia. ARENA is helping to demonstrate that potential by supporting ElectraNet’s construction of a The project involved AEMO having remote large-scale battery near the Dalrymple substation control over the facility’s wind turbines so that on ’s Yorke Peninsula. the market operator could adjust the amount of electricity being generated to maintain the This is the second stage of the Energy Storage grid’s stability. for Commercial Renewable Integration (ESCRI) project, following a study into the potential for By confirming that wind generation has the such storage to benefit the state’s electricity potential to help with system stability, the network. The 30 megawatt, eight megawatt project was another important step towards hour facility will store energy generated by demonstrating renewable energy’s potential AGL’s Wattle Point wind farm to demonstrate role in the NEM. It also provided proof of how energy storage can strengthen the grid concept to the energy market and investors and improve local reliability. on the ability of wind farms to provide FCAS. When completed in mid-2018, it will be the first large-scale, grid-connected battery to be designed, built and commercially operated in Australia largely with private investment from energy providers. It will also be one of the largest batteries in the world, in terms of megawatt capacity, behind the Tesla/Neoen battery located in the same state.

62 USING RENEWABLES TO KEEP THE GRID SECURE

ESCRI BATTERY PROJECT

The first large-scale, grid-connected battery to be designed, built and operated in Australia largely with private investment from energy providers. The Energy Storage for Commercial Renewable Integration (ESCRI) project will provide grid stability in multiple ways.

>> Provides fast-acting power >> Improves supply reliability response, keeping grid in by operating as microgrid balance when generators with Wattle Point wind farm or transmission lines fail and rooftop solar when main grid supply is lost

>> Reduces constraints on >> Retailer operates battery Heywood interconnector under agreement with with Victoria (should place ElectraNet, providing downward pressure on SA additional market wholesale power prices) 30 MW / 8 MWh utility-scale services without lithium-ion battery compromising security and reliabilitiy services

ARENA 2017–18 ANNUAL REPORT 63