Optimal Power Scheduling for High Renewables-Integrated Energy Systems with Battery Storage

TL;DR

This paper introduces a linearized sparse neural network model for battery degradation prediction, improving energy scheduling efficiency in high-renewable power systems with battery storage by reducing model complexity.

Contribution

The paper proposes a novel sparse neural network-based battery degradation model tailored for energy scheduling in renewable-integrated power systems, balancing accuracy and computational efficiency.

Findings

The SNNBD model accurately predicts battery degradation.

The approach reduces computational complexity in energy scheduling.

Case studies validate the model's effectiveness across different grid scales.

Abstract

In high renewables-integrated power systems, irrespective to their sizes, energy storage is commonly included and utilized to mitigate fluctuations from both the load and renewable power generation, ensuring system reliability, among which battery energy storage system (BESS) are experiencing fast-growth in recent years. The BESS systems, predominantly employing lithi-um-ion batteries, have been extensively deployed. The degrada-tion of these batteries significantly affects system efficiency. Deep neural networks can accurately quantify the battery degrada-tion; however, the model complexity hinders their applications in energy scheduling for various power systems at different scales. To address this issue, this paper presents a novel approach, in-troducing a linearized sparse neural network-based battery deg-radation model (SNNBD), specifically tailored to quantify battery degradation based on the scheduled BESS operational profiles. This approach achieves accurate degradation prediction while substantially reducing the complexity associated with a dense neural network model. The computational burden of day-ahead energy scheduling when integrating battery degradation can thus be substantially alleviated. Case studies, conducted on both small-scale microgrids and large-scale bulk power grids, demonstrated the efficiency and suitability of the proposed optimal energy scheduling model that can effectively address battery degrada-tion concerns while optimizing day-ahead energy scheduling op-erations.