Using hydropower waterway locks for energy storage and renewable energies integration

Waterway are one of the most efficient means for transportation. It can be applied for energy storage demonstrating the potential of using these structures with renewable energy systems, here, through an analysis of energy alternatives. This paper analyzes two different solutions for energy supply, using the Locks of the Tucuruí powerplant, in Brazil. A photovoltaic power station is compared to a hybrid system composed by photovoltaic and pumped storage. The alternatives are discussed technically and economically. The energy costs of the scenarios are calculated based on the evolution of the expenses and the related payback time are found. The water resource is exploited responsibly, keeping balanced the pumped and turbined volumes of water. The grid works as an intermediate storage and allows the operations with a single pump-turbine conversion. Its location lowers down the initial investment in favor of the hybrid system as the more viable alternative. It was found that the locks could be used to handle up to 263 kW and 387 kW of electricity in turbine and pump mode, respectively. This paper gathers crucial data on the use of hydropower in waterways locks that support the integration of renewable energies surrounding the locks. In addition, the use of pumped storage plants to store energy from intermittent sources, present themselves as an innovative opportunity to, using the own head available at facility, improve the financial return of meeting the energy demand through an economically and environmentally responsible energy system, may be useful in similar facilities around the world

Solar Photovoltaic Energy and Pumped Hydro Storage System Coupling in Southern Countries

This chapter reviews the coupling of solar photovoltaic (PV) energy generation with pumped hydro energy storage power (PHES) plants in Southern countries, particularly on African countries and Brazil projects. The complementary between PV and hydraulic power plants (HPP) as a hybrid energy generation and storage systems are analyzed through the reviewed studies. In Africa some proposed new hybrid renewable are presented. In Brazil the projects with floating PV panels are analyzed in view of the large potential for this application. Finally, a hybrid PV-PHES plant using the civil structures of an existing lock canal from the Tucuruí power plant is discussed in detail. This project represents an interesting application of a low-cost hybrid PV-PHES power plant