Extraction of Typical Operating Scenarios of New Power System Based on Deep Time Series Aggregation

TL;DR

This paper introduces a deep time series aggregation method (DTSAs) that uses a novel image encoding technique to extract and generate typical operational scenarios of new power systems, improving decision-making and robustness.

Contribution

The study proposes a new deep aggregation scheme with a GASF-based encoder to accurately capture and generate typical power system operational scenarios from large historical data.

Findings

Outperformed existing high-dimensional feature screening methods.

Demonstrated robustness across different new energy access ratios.

Enabled proactive dispatching and scenario response in power systems.

Abstract

Extracting typical operational scenarios is essential for making flexible decisions in the dispatch of a new power system. This study proposed a novel deep time series aggregation scheme (DTSAs) to generate typical operational scenarios, considering the large amount of historical operational snapshot data. Specifically, DTSAs analyze the intrinsic mechanisms of different scheduling operational scenario switching to mathematically represent typical operational scenarios. A gramian angular summation field (GASF) based operational scenario image encoder was designed to convert operational scenario sequences into high-dimensional spaces. This enables DTSAs to fully capture the spatiotemporal characteristics of new power systems using deep feature iterative aggregation models. The encoder also facilitates the generation of typical operational scenarios that conform to historical data distributions while ensuring the integrity of grid operational snapshots. Case studies demonstrate that the proposed method extracted new fine-grained power system dispatch schemes and outperformed the latest high-dimensional featurescreening methods. In addition, experiments with different new energy access ratios were conducted to verify the robustness of the proposed method. DTSAs enables dispatchers to master the operation experience of the power system in advance, and actively respond to the dynamic changes of the operation scenarios under the high access rate of new energy.