Optimal coordination between generation and storage under uncertainties

Optimal coordination between generation and storage under uncertainties

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This chapter aims at providing some ideas on how to fit energy storage devices into the constantly evolving grid environment with more and more renewable generation. The core idea of this chapter is to assign tasks according to the capabilities of the resource assets. In the context of real-power balancing, this capability-based task assignment is exactly the so-called time-scale-matching principle. The proposed twolevel optimal control approach makes full use of the fast response capability of energy storage to tackle the real-power-balancing problem under the new environment. With the coordinated control of energy storage, better performance in frequency control is seen from the simulation results even that the conventional generators become less responsive to high-frequency portions in the spectrum of external power variations.

Chapter Contents:

  • 12.1 Background
  • 12.2 A new two-level approach
  • 12.3 AFC level
  • 12.3.1 Feasibility of decentralized PI frequency control
  • 12.3.2 Structure-preserving system modeling
  • 12.3.3 Basics of robust control
  • 12.3.4 AFC controller design with energy storage
  • 12.3.5 Case study
  • 12.4 Stochastic optimal dispatch level
  • 12.4.1 SMPC basics and problem formulation
  • 12.4.2 Solution approach
  • 12.4.3 Case study
  • 12.5 Summary
  • References

Inspec keywords: frequency control; renewable energy sources; power grids; energy storage

Other keywords: two-level optimal control approach; capability-based task assignment; optimal coordination; so-called time-scale-matching principle; external power variations; frequency control; conventional generators; renewable generation; grid environment; energy storage devices; real-power balancing

Subjects: Other energy storage; Energy storage

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