PID AND I.jpg

Load frequency control in power system


Cover imageThe paper presents a new discrete-time sliding mode controller for load-frequency control (LFC) in control areas (CAs) of a power system. As it uses full-state feedback it can be applied for LFC not only in CAs with thermal power plants but also in CAs with hydro power plants, in spite of their non-minimum phase behaviors. To enable full-state feedback we have proposed a state estimation method based on fast sampling of measured output variables, which are frequency, active power flow interchange and generated power from power plants engaged in LFC in the CA. The same estimation method is also used for the estimation of external disturbances in the CA, what additionally improves the overall system behavior. Design of the discrete-time sliding mode controller for LFC with desired behavior is accomplished by using a genetic algorithm. To the best of our knowledge, proposed controller outperforms any of the existing controllers in fulfilling the requirements of LFC. It was thoroughly compared to the commonly used PI controller by extensive simulation experiments on a power system with four interconnected CAs. These experiments show that the proposed controller ensures better disturbance rejection, maintains required control quality in the wider operating range, shortens the frequency’s transient response avoiding the overshoot and is more robust to uncertainties in the system.

Keywords

  • Sliding mode control;
  • Load-frequency control;
  • Fast output sampling;
  • Genetic algorithm;
  • Uncertainties


Share this article





Related Posts


System of internal Controls
System of internal Controls

Latest Posts
Applications of Control Systems in Industry
Applications…
The demand for installed wireless control…
Define open loop control system
Define open loop…
Likewise, if something happens to disturb…
Control Systems Engineering companies
Control Systems…
Our students are sought for their interdisciplinary…
Load frequency control in power system
Load frequency…
The paper presents a new discrete-time…
Aftermarket Traction control system
Aftermarket Traction…
Warning: Please read the notes on our…
Search
Featured posts
  • Signal flow graph in control system
  • Types of control in Management control Systems
  • System of internal Controls
  • Accounting system and internal control
  • Internal control systems are
  • Internal control system in an organization
  • What are internal control systems?
  • Guidance on Monitoring internal control systems
  • Evaluation of internal control systems
Copyright © 2018 l www.oliver-control.com. All rights reserved.