Microgrid Optimal Energy Scheduling Considering Neural Network based Battery Degradation

TL;DR

This paper introduces a neural network-based model to predict battery degradation for microgrid scheduling, enabling more accurate cost assessment and proposing a heuristic algorithm to solve the complex optimization problem.

Contribution

It presents a novel data-driven neural network model for battery degradation prediction integrated into microgrid scheduling and develops a heuristic algorithm to solve the resulting complex optimization problem.

Findings

The proposed NNBD model accurately predicts battery degradation.

The NNODH algorithm effectively finds optimal scheduling solutions.

Incorporating degradation costs reduces overall operational costs.

Abstract

Battery energy storage system (BESS) can effec-tively mitigate the uncertainty of variable renewable generation. Degradation is unpreventable and hard to model and predict for batteries such as the most popular Lithium-ion battery (LiB). In this paper, we propose a data driven method to predict the bat-tery degradation per a given scheduled battery operational pro-file. Particularly, a neural network based battery degradation (NNBD) model is proposed to quantify the battery degradation with inputs of major battery degradation factors. When incorpo-rating the proposed NNBD model into microgrid day-ahead scheduling (MDS), we can establish a battery degradation based MDS (BDMDS) model that can consider the equivalent battery degradation cost precisely with the proposed cycle based battery usage processing (CBUP) method for the NNBD model. Since the proposed NNBD model is highly non-linear and non-convex, BDMDS would be very hard to solve. To address this issue, a neural network and optimization decoupled heuristic (NNODH) algorithm is proposed in this paper to effectively solve this neural network embedded optimization problem. Simulation results demonstrate that the proposed NNODH algorithm is able to ob-tain the optimal solution with lowest total cost including normal operation cost and battery degradation cost.