Could the grid stymie India’s storage plans?

Pumped hydro might not be the best option for long-term storage in India (pic: animam.photography).

Pumped hydro might not be the best option for long-term storage in India (pic: animam.photography).

 

By Jason Deign

Doubts over the strength of the grid have called into question a USD$17.2bn plan to build 10GW of pumped hydro storage in India.

Central Electricity Authority chairman SD Dubey unveiled the five-to-six-year pumped hydro programme last month.

The administration would be adopting pumped hydro to store excess power from India’s growing renewable energy sector because the storage medium is cheaper than batteries, he said.

But being able to store energy in pumped hydro reserves depends upon getting it to the dams in the first place.

And observers have questioned whether India’s grid is up to the task, particularly since it is already groaning under the impact of solar energy. 
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The nuclear plant powering debate over storage

Artist's view of the Hinkley Point C nuclear plant. Image: EDF Energy.

Artist’s view of the Hinkley Point C nuclear plant. Image: EDF Energy.

By Jason Deign

A surprise U-turn over a UK nuclear power plant has ignited debate over whether renewables, backed by storage, might not be a better alternative.

Last month the UK’s new, post-Brexit administration raised eyebrows after announcing a further review of Hinkley Point C, a controversial nuclear power plant that was supposed to have been given the final go-ahead on July 29.

UK officials rushed to issue assurances after the postponement threatened to spark tensions with China and France, the international partners in the GBP£18bn project.

“The UK needs a reliable and secure energy supply and the government believes that nuclear energy is an important part of the mix,” soothed Greg Clark, business, energy and industrial strategy secretary, in press reports.

The government said it would now make its final decision “in early autumn,” he said.
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Battery key to island’s hybrid system

SMA's Sint Eustatius hybrid solar, battery and diesel plant.

SMA has commissioned a hybrid solar, battery and diesel plant to reduce fossil fuel consumption on the Caribbean island of Sint Eustatius.

 

By Jason Deign

Inverter maker SMA Solar Technology yesterday confirmed commissioning of a hybrid battery, PV and diesel system covering the electricity needs of a small Caribbean island.

The system will allow the 21km2, 3,500-population island of Sint Eustatius, in the Caribbean Netherlands, to cut its fossil-fuel consumption by 30%, equivalent to 800,000 litres of diesel and 2,200 tons of CO2 a year.

The hybrid system includes a 1.9MW solar plant, which can cover more than 23% of the island’s 13.5GWh annual electricity demand, plus 1MW of battery storage.

Diesel genset integration is through SMA’s Fuel Save Controller 2.0 software. SMA also supplied a Sunny Central Storage 1000 battery inverter and a Medium Voltage Power Station 1000.

This “enables a measured solar fraction of up to 88% during sunshine hours and supports the grid with stability functions such as frequency regulation, ramp-rate control for PV and optimisation of diesel genset operation,” SMA said.
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P2P energy player lobbies for storage

Battery storage in P2P energy networks could help businesses such as the Eden Project save money. (Pic: Jürgen Matern)

Battery storage in P2P energy networks could help businesses such as the Eden Project save money. (Pic: Jürgen Matern)

By Jason Deign

Peer-to-peer (P2P) power supplier Open Utility is planning to pressure the UK electricity market regulator towards introducing grid-balancing measures that could include energy storage.

The company, which runs an energy marketplace called Piclo, hopes to convince the Office of Gas and Electricity Markets (Ofgem) that P2P networks are good for consumers and distributed generation asset owners.

“There are significant benefits in better balancing renewables and demand on a local electricity network,” said James Johnston, Open Utility’s CEO and co-founder. “Energy storage will be key in enabling this balancing.”

Currently, he said, UK regulations do little to encourage the use of energy storage in P2P networks. Piclo, which allows businesses to buy renewable power directly from source, does not currently include storage, for example.

However, Johnston said: “If regulations allow for it, incentivising local balancing using P2P energy matching could unlock significant financial rewards for local consumers and generators.”
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Pumped hydro looks good at 40

The Ludington Pumped Storage Plant on the Lake Michigan shoreline.

The Ludington Pumped Storage Plant on the Lake Michigan shoreline. Photo credit: Consumers Energy

We’ve already seen that, despite massive initial capital costs, the amount of energy needed to build a pumped hydro plant compared with its lifetime storage capacity makes it the most efficient energy storage investment in the game. So it’s great to see a project showing that even though you’ve been around for four decades, you still have plenty to offer the grid and its customers.
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Energy storage a victim of FiTs

Germans are getting paid too little to store energy and too much to put it into the grid, says a top German scientist. Speaking to the BBC, Dr Michael Specht said that energy storers are being unfairly penalised and they should not bear the same costs that consumers of electricity have to pay. The current situation is that an increasing number of individuals, farms, small businesses and co-operatives are making money with generous, guaranteed long-term feed-in tariffs (FiTs).
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Battery to store power plant energy

Fenne power plant, site of the new lithium-ion battery system.

Fenne power plant, site of the new lithium-ion battery system. Photo credit: STEAG GmbH

Evonik Industries has announced a lithium-electricity storage system will go into operation at STEAG’s Fenne power plant in Völklingen, Germany. The battery system is designed to accommodate 4,700 lithium-ion batteries with a storage capacity of around 700kWh and an output of around 1MW.
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