Ocean energy storage system tested in germany

What is deep sea pumped hydro storage?

Deep sea pumped hydro storage is a novel approach towards the realization of an offshore pumped hydro energy storage system (PHES), which uses the pressure in deep water to store energy in hollow concrete spheres. The spheres are installed at the bottom of the sea in water depths of 600 m to 800 m.

Why is energy storage important in Germany?

Balancing the rising share of intermittent renewables calls for new solutions and business models. In Germany, energy storage has experienced a dynamic market environment in recent years, particularly for providing ancillary services, and in home applications. This report sheds light on the important topic of energy storage.

How many large-scale battery projects have been realised in Germany?

More than 50 large-scale battery projects for frequency regulation have been realised in Germany over the past few years (Figure 15). are able to automatically, and in a matter of seconds, either supply energy to the power grid or take energy from it - depending on what is currently required.

Is the StEnSea system cost competitive with conventional pumped hydro energy storage (PHES)?

The techno-economic assessment shows that the StEnSea system is cost competitive with conventional pumped hydro energy storage (PHES). While the exploitation of PHES often raises environmental issues due to land demand and its impact on the water regime, there are no major restrictions expected for the StEnSea technology.

How do batteries work in Germany?

Power stored in the batteries can be sold in Germany’s weekly auctions for primary reserve control markets to grid operators who would then use it to provide the balancing power. The batteries replace then conventional fossil power plants which provide the balancing power so far.

What role does energy storage play in China?

Energy storage systems play an important role in China. By the end of 2018, China had approximately 30 GW of pumped storage power plants and 1 GW of electrochemical storage (batteries) installed. China's government plans to push ahead with the expansion of battery storage facilities for further RES grid integration.