Due to the fluctuations in electricity demand, hydroelectric power plants cause great fluctuations in river flow. In order to reduce this problem, researchers at the Polytechnic University of Madrid recommend using electric vehicle batteries, where part of the energy generated can be stored and then gradually released.
Due to the sudden fluctuations in the flow originating from the river bed, hydroelectric power plants have had a huge impact on the river ecosystem. In order to study how to alleviate this situation, a team of researchers from the Polytechnic University of Madrid conducted a study that evaluated the possibility of using electric vehicle batteries to provide additional storage capacity for the system to lead to more hydroelectric power generation. Balancing the energy accumulation in the batteries of these vehicles will facilitate the gradual development of hydroelectric power plants, thereby reducing river pressure.
Considering that the growing popularity of “plug-in” electric vehicles requires their batteries to be used to store energy and provide flexibility to the grid, members of this group Aquatic biology And Transportation Research Center (transportUPM (UPM) has studied the energy storage capacity allocation of such vehicles in eight countries with different socio-economic and technological environments to reduce the environmental impact of hydropower peaks caused by demand.
Hydropower plants plan their operations to optimize their economic efficiency. Therefore, due to the high electricity prices during this period, they usually try to produce energy during the peak power demand period in the afternoon. Similarly, due to low energy prices, night production is very low or non-existent.
During the operation of the plant, the operation of the turbine will cause the release of water. Therefore, the above-mentioned operation scheme will cause large fluctuations in river flow (this phenomenon is called Water peak), leading to serious deterioration of the river ecosystem.
Research conducted by UPM researchers recommends using the available “plug-in” electric vehicle fleet to encourage hydroelectric power plants to increase production during periods of low demand (usually at night) and store this energy in electric vehicles. In the car, so that electric vehicles can build the grid during peak demand periods, thereby reducing the peak operation of the factory.
Therefore, this will allow to reduce the maximum flow of the river and increase the minimum flow, thereby reducing the impact of plants and helping to better simulate the flow of natural conditions.
The results obtained in the 2050 scenario show that with a density of 300 batteries, the penetration rate of these electric vehicles in the total fleet is 50% Watt/kg, It can provide stable storage capacity for the daily average hydropower production in Germany, China, Spain, the United States and Japan.
Therefore, as the researcher Diego García de Jalón who directed the study pointed out, “Based on the results obtained, we conclude: Water peak Use future energy storage available in “plug-in” electric vehicles.
At the same time, this application will make the operation of hydroelectric power plants more flexible, conducive to compliance with ecological flow, and make the water flow state more similar to natural water flow. As a result, hydroelectric power generation will require less electricity, which will reduce the cost of the facility and eliminate the need to build compensation boxes.
A. Román, D. García de Jalón and C. Alonso. “Can future electric vehicle energy storage technologies be used to alleviate water peaks? Feasibility analysis in eight countries.” Resources, protection and recycling. Volume 149. Pages 760-777, 2019.