Vanadium batteries could stabilize power grids and help prevent blackouts in Ecuador
image: Divulgative illustration showing how large-scale battery energy storage systems can support the electric grid during stressed operating conditions by helping stabilize voltage, maintaining frequency, and keeping energy flowing.
Credit: Luis Muñoz / ESPOL
The transition toward renewable energy is redefining the operation of power systems worldwide. However, this shift brings a growing technical challenge: the loss of grid stability. Unlike conventional power plants, renewable sources such as solar and wind do not inherently provide inertia to the system, making power grids more vulnerable to rapid voltage and frequency fluctuations that can lead to blackouts.
In this context, a team of researchers from the Escuela Superior Politécnica del Litoral (ESPOL) and the National Electricity Operator of Ecuador (CENACE) evaluated the potential of stand-alone battery energy storage systems (BESS) as a solution to strengthen the resilience of Ecuador’s power system. Their findings, published in the journal Sustainability, show that this technology could play a key role in stabilizing power grids with high penetration of renewable energy.
The study focuses on a technology that is less common than lithium ion batteries: vanadium redox flow batteries (VRB). Unlike other alternatives, these batteries stand out for their long service life, high scalability, and ability to provide sustained responses to power variations features that are especially relevant for integration into transmission networks.
To evaluate their performance, the researchers modeled a 10 MW BESS with a minimum capacity of 4.17 MWh, designed to act as dynamic support during short-duration critical events. The simulation was carried out on the 230 kV Milagro–Zhoray transmission line, a strategic corridor of Ecuador’s power system, with the battery integrated at a key network node in the coastal region.
From a methodological perspective, the study uses electromagnetic transient (EMT) simulations, an advanced tool that makes it possible to analyze system behavior at time scales on the order of microseconds. This approach goes beyond traditional models by capturing with greater precision the response of the power electronic converters that control the batteries, especially during sudden faults.
The results show a significant impact. In critical scenarios, such as the sudden loss of generation or a three-phase short circuit, the unsupported grid experienced sharp voltage and frequency drops, along with oscillations that could compromise service continuity. In contrast, the integration of the BESS made it possible to contain these disturbances, reducing voltage recovery time by 28% and frequency recovery time by 24%, while also rapidly damping system oscillations.
The study also identifies a key operational aspect: the battery dispatch level directly influences its performance. While higher power injection improves system stability, it also accelerates the consumption of stored energy. This highlights the need to implement intelligent operating strategies capable of optimizing the use of these systems according to demand and grid conditions.
Beyond its technical findings, the research positions battery energy storage systems as a strategic component of the future energy landscape. Their ability to respond within milliseconds not only helps prevent faults but also enables the safe integration of renewable energy, reducing dependence on conventional generation.
In a global scenario where decarbonization is advancing rapidly, studies such as this provide concrete evidence of how emerging technologies can support power grid stability. For countries like Ecuador, where infrastructure faces operational challenges and growing energy demand, these solutions could make the difference between vulnerability and resilience