Romanian state-owned power utility Hidroelectrica will install storage on all its run-of-river hydropower plants, to be able to switch the supply of surplus electricity to the evening peak, according to interim CEO Bogdan Nicolae Badea.

Hybrid power plants are all the rage. Two- and even three-way combinations between batteries and solar and wind power plants have become more and more popular over the past few years, as they enable steadier and more predictable supply. But energy storage can have a meaningful role in tandem with hydropower as well, and interim President of the Board of Directors of Hidroelectrica Bogdan Nicolae Badea revealed plans for such investments.

Namely, impoundment hydroelectric plants control the flow from the reservoir through the dam, so much of their production can be adjusted to demand. Run-of-river facilities can store little to no water, which is why the Romanian state-owned hydropower plant operator intends to add energy storage to its entire operational portfolio in the segment, Badea explained.

Goal is to lower daily price spreads at power exchange

The idea is to switch the supply of electricity from times of surplus within the day to the evening peak, the interim CEO stressed at the Profit Energy.forum. There are seven to eight slots a day at the electricity exchange with very low or negative prices, and others with excessive prices, Badea pointed out.

“Even in free market conditions and affected by external crises, the cost borne by consumers could be somewhat lower than today if Romania had energy storage capacities, so that daily consumption peaks are in balance with production peaks,” the interim CEO underscored.

Price caps hurting Romanian state budget

Romania caps power prices, which harms the state budget, Badea noted and said there are two ways to achieve a balance.

“The first solution is a systemic one – and here all the important participants in the energy sector must invest – and Hidroelectrica is doing this, investing primarily in diversification. We have a wind farm in operation today. We are investing a lot in the storage area and we are trying to combine renewable sources, hydro, photovoltaics, floating photovoltaics,” he stated.

Hidroelectrica signed a contract in April with a consortium of Romanian companies Prime Batteries Technology and Enevo Group, for a lithium ion battery energy storage system at its Crucea Nord wind farm.

Hidroelectrica is investing in storage, solar power and hybrid power plant projects

The company also plans to integrate a BESS with hydropower plant Iron Gate 2 (Porţile de Fier 2) on the Danube. The project is valued at EUR 61.2 million. Some hydropower plants are set to be equipped with rooftop photovoltaic systems.

Badea was also the company chief from 2017 to 2023. He was recently reappointed, after he was the chief investment officer for almost two years.

For the first six months of this year, hydrological data shows a situation reminiscent of the critical moment when the company entered insolvency, in 2015, Badea added. However, unlike that period, today Hidroelectrica is a profitable, stable company and a pillar of the energy system, he stressed.