Hierarchical Optimal Dispatch of Active Distribution Networks Considering Flexibility Auxiliary Service of Multi-community Integrated Energy Systems

TL;DR

This paper proposes a hierarchical stochastic dispatch method for active distribution networks that leverages multi-community integrated energy systems to improve renewable energy utilization and operational flexibility.

Contribution

It introduces a novel dispatch approach considering flexibility auxiliary services of MCIESs and develops an analytical distributed solving method based on target cascading theory.

Findings

Enhances renewable energy consumption in ADNs.

Increases MCIES revenue through optimized dispatch.

Reduces uncertainty risk in system operation.

Abstract

Active distribution networks (ADNs) are the main platforms for carrying large-scale distributed renewable energy and flexible resources, and multi-community integrated energy systems (MCIESs) may become important flexible resource supplies in ADNs owing to their multi-energy synergistic and complementary advantages. To fully utilize the flexible regulation potential of MCIESs for ADNs, a novel hierarchical stochastic dispatch approach for ADNs that considers flexibility auxiliary services of MCIESs is proposed. In this approach, a flexibility auxiliary service pricing strategy that combines adjustment cost and flexibility margin is established by evaluating the operational flexibility of MCIESs. In addition, considering renewable uncertainty, an MCIES-ADN flexibility interaction mechanism based on insufficient flexibility risk is designed to optimize their operation strategies and reduce the uncertainty risk. In the solution phase, an analytical target cascading theory-based distributed solving method is developed to realize decoupling and parallel solving of multiple stakeholders. The simulation results for a PG&E 69-node system with three CIESs demonstrate that the proposed approach not only improves MCIES revenue but also enhances ADN flexibility to consume renewable energy, which provides a fundamental way for efficient application of regional mutual aid.