Augmenting data-driven models for energy systems through feature engineering: A Python framework for feature engineering

TL;DR

This paper introduces a Python framework for feature engineering to enhance data quality in energy systems modeling, demonstrating improved prediction accuracy in an energy demand case study.

Contribution

It presents a new Python framework based on scikit-learn that offers various feature engineering methods tailored for energy system data modeling.

Findings

Improved prediction accuracy with engineered features

Framework effectively supports feature creation, expansion, and selection

Demonstrated on energy demand prediction case study

Abstract

Data-driven modeling is an approach in energy systems modeling that has been gaining popularity. In data-driven modeling, machine learning methods such as linear regression, neural networks or decision-tree based methods are being applied. While these methods do not require domain knowledge, they are sensitive to data quality. Therefore, improving data quality in a dataset is beneficial for creating machine learning-based models. The improvement of data quality can be implemented through preprocessing methods. A selected type of preprocessing is feature engineering, which focuses on evaluating and improving the quality of certain features inside the dataset. Feature engineering methods include methods such as feature creation, feature expansion, or feature selection. In this work, a Python framework containing different feature engineering methods is presented. This framework contains different methods for feature creation, expansion and selection; in addition, methods for transforming or filtering data are implemented. The implementation of the framework is based on the Python library scikit-learn. The framework is demonstrated on a case study of a use case from energy demand prediction. A data-driven model is created including selected feature engineering methods. The results show an improvement in prediction accuracy through the engineered features.