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Decentralized dynamic system for optimal power dispatch in wind farms based on node-dependence nature.

Sheng Huang1, Hanzhi Peng2, Xiaohui Huang1

  • 1College of Electrical and Information Engineering, Hunan University, 410082, Changsha, China.

Communications Engineering
|August 18, 2024
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Summary

This study introduces a decentralized system for optimizing wind farm power dispatch. The method efficiently manages power supply constraints using local measurements, achieving near-global optimal performance.

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Area of Science:

  • Electrical Engineering
  • Renewable Energy Systems
  • Control Theory

Background:

  • Power dispatch for wind farms must meet grid demand, posing complex global supply-demand constraints.
  • Centralized or distributed processing of these constraints is computationally intensive for large-scale wind farms.
  • Fast and localized execution of power optimal dispatch is crucial.

Purpose of the Study:

  • To develop a decentralized dynamic system for optimizing wind farm power flow.
  • To address the challenge of computationally complex global equality constraints in power dispatch.
  • To enable fast and localized execution of optimal power dispatch strategies.

Main Methods:

  • A completely decentralized dynamic system was designed for power flow optimization.
  • Global power constraints were decoupled into local wind turbine controllers using node-dependence and a power sensitivity matrix.
  • Local optimization problems were solved iteratively via the gradient projection method.

Main Results:

  • The proposed decentralized system effectively optimizes power flow while satisfying electricity supply constraints.
  • The system demonstrated linear convergence to an equilibrium point.
  • Simulations confirmed near-global optimal performance using only local measurements.

Conclusions:

  • The decentralized approach successfully decouples complex global constraints into manageable local problems.
  • The method offers an efficient and computationally feasible solution for large-scale wind farm power dispatch.
  • Local measurements are sufficient for achieving high-performance optimal power dispatch in wind farms.