Optimizing Grids with Large-Scale Batteries

Figure 1: The operation framework of the day-ahead dispatch.


The research presents an advanced model for the optimal day-ahead scheduling of large-scale battery energy storage systems (LS-BESS) within power grids, particularly focusing on integrating high levels of wind energy. This model aims to address the declining frequency response and peak regulation capabilities of power systems burdened by renewable energy sources’ intermittency.

Problem Statement

Power systems face challenges from weakened inertia and primary frequency response due to increasing renewable energy integration, leading to potential instability and inefficiency. The paper proposes utilizing LS-BESS to enhance grid stability and economic efficiency through strategic dispatch that includes participation in frequency control ancillary services (FCASs).


    The proposed model integrates LS-BESS in day-ahead dispatch strategies to optimize the grid’s operational cost, reliability, and safety. This involves:

    • Coordinating generation units and LS-BESS for multi-type FCAS.
    • Employing robust optimization (RO) techniques to manage uncertainties, especially from wind power.
    • Using conditional value-at-risk (CVaR) to address operational risks and ensure cost-effectiveness.
    Key Findings

    Simulations indicate that including LS-BESS in day-ahead dispatch for multiple FCASs significantly enhances grid reliability, security, and cost-efficiency. The model effectively balances generation demands with operational uncertainties, particularly those associated with wind power.


    This study underscores the potential of LS-BESS in transforming power grids into more resilient and efficient systems, especially in scenarios with high renewable energy penetration. It also highlights the importance of considering full timescale uncertainties in the dispatch process to optimize both economic and technical performance.


    The paper concludes that large-scale batteries, when optimally dispatched, can substantially mitigate the operational challenges of modern power grids, making them more adaptable to the variability of renewable energy sources.

    This summary reflects the structured approach and comprehensive analysis used in the paper to tackle the challenges of integrating renewable energy into power grids through advanced battery dispatch strategies.