Almacenamiento de energía mediante baterías para aliviar la curva de demanda del alimentador 0524

Abstract

This work studies the feasibility of implementing energy storage in feeder 0524 in the city of Cuenca to alleviate the demand curve. For this, both technical and economic aspects of existing technologies on the market are considered. Feeder 0524 belongs to substation 05 (El Arenal) of Empresa Eléctrica Regional Centro Sur, it is located in the urban area of the city of Cuenca (Tarquino Cordero street, El Arenal, El Salado, Indurama, Coral Centro, El Tiempo, Parque Iberia, Av. Remigio Crespo, Miguel Merchán school). Based on consumption data recorded for 12 months for this feeder, the feasibility of battery based storage systems to flatten the demand curve is analyzed. The selected system consists of a bank of 56 Lithium Ion batteries, with a total storage capacity of 500 kW taking into account that it is the power provided by the El Descanso Thermoelectric Plant to the 0524 feeder when the generation dispatch requires it, that is, when the energy demand is greater than what hydroelectric generation can provide. These types of batteries allow their use in city conditions and the operating parameters of the feeder. With the results obtained, an analysis of the technical benefits of its implementation is carried out. It is shown that the operation of the proposed storage system allows the feeder to function better, especially in peak demand times, when the storage system delivers load to the grid, while the load of the system can be carried out in a better way, in off-peak or off-peak hours. The economic-financial analysis of the proposal shows that the initial investment is $647468.51, this investment is justified because the TIR is positive with a value of 11.64% and the VAN shows that the expected return is greater than a minimum acceptable return. From an economic point of view, the incorporation of a battery bank is beneficial for the Electric Company, due to the fact that the demand curve can be flattened, obtaining a better projection of the energy necessary to meet the consumption requirement, which is beneficial if one takes into account that the energy that comes in this case from a water source would be stored during the off-peak hours with a lower cost to use it in the hours of highest consumption, reducing dependence on the energy produced by a thermoelectric plant with a more expensive value. It should also be considered that if the project is part of a private investment, it would not present profitability due to the current costs of the elements that make up the system