The remote pearling and tourism town of Broome – in the northwest of Western Australia – is to have its current supply of fossil fuel generation largely replaced by a large solar farm and six-hour big battery, under proposals unveiled by the state-owned Horizon power.
The plans include a 90 megawatt (MW) solar farm, supported by a 42 MW, 239 MWh battery, and associated network infrastructure.
It is designed to replace the current power contract that relies on gas and diesel for the town of 15,000 people, more than 2,000 kms north of Perth. It says the new renewable based system will be cheaper, cleaner, more reliable and offer more economic opportunities. (source: https://reneweconomy.com.au/)
The details of the proposal – first flagged several years ago – are revealed in an application to the state Environmental Protection Agency, and while not the first remote town to feature solar and a big battery, it appears to be one of the biggest of its type in Australia, if not the biggest.
Horizon Power says the Future Energy System (FES) in Broome will ensure security of energy supply to Broome after the expiry of the existing power purchase agreement, and will result in higher renewables and a reduction in one million tonnes of greenhouse gas emissions over the assumed 20-year lifetime of the project.
Wind energy had been considered, but Horizon says it was rejected because the wind resource was not considered strong, and because of the risk of cyclones.
It also cited the remoteness – high maintenance, logistics, supply issues – higher capital cost compared to solar, and environmental impacts to aerial fauna and the challenge of obtaining environmental and regulatory approvals.
The new solar and battery facility will replace the contract with the existing Broome power station, owned by EDL, which includes 17 small gas generators, and nine back-up diesel generators, with a total of 42 MW. There are more than two dozen different generators because of the varying consumer patterns, and the need for back-up.
Horizon says extending the gas and diesel contract would risk high supply costs, reduced reliability (because of fuel supply chain disruptions), and higher emissions, as well as missed economic opportunities in a renewable transition.
The Broome Clean Energy Report, commissioned by Environs Kimberley and produced by Sustainable Energy Now in 2023, estimated that more than 80 per cent of Broome’s electricity generation could be achieved with renewable energy at three quarters of the price of gas-fired generation.
“Many towns in the Kimberley are powered by high emission fossil fuels such as diesel and gas. In Broome, Horizon Power currently purchases power from an independent power producer,” the application says.
“The power purchase agreement (PPA) is due to expire, providing Horizon Power with an opportunity to integrate gridscale renewable electricity into the town supply.”
It says the final design of the project may change before a final investment decision is made.
The proposals includes a 16 kms transmission line, either underground or overhead, that will follow Broome Cape Leveque Road, Broome Highway, Old Broome Road and Fredrick Street to connect the solar PV and BESS to the existing substation on Fredrick Street in Broome.