Design of adaptive H∞ controller for power system based on prescribed performance.
Ling Chang1, Yuanwei Jing2, Yang Liu3
1College of Information Science and Engineering, Northeastern University, Shenyang, 110819, PR China; Faculty of Information and Control Engineering, Shenyang Urban Construction University, Shenyang, 110167, PR China.
ISA Transactions
|December 14, 2019
Summary
This study introduces an adaptive robust controller for power system excitation, effectively mitigating external disturbances and estimating unknown parameters. The controller ensures prescribed transient performance for generator rotor angles, validated through simulations of mechanical and short circuit faults.
Area of Science:
- Electrical Engineering
- Control Systems
- Power Systems
Background:
- Excitation systems in single-machine infinite power systems are crucial for stability.
- External disturbances and unknown system parameters pose significant challenges to controller design.
- Ensuring robust performance and predictable transient behavior is essential for grid reliability.
Purpose of the Study:
- To design an adaptive robust controller for the excitation system of a single-machine infinite power system.
- To attenuate the influence of external disturbances and estimate unknown system parameters.
- To achieve prescribed transient performance for the generator rotor angle.
Main Methods:
- Integration of H∞ theory with adaptive control techniques.
- Implementation of a prescribed performance control (PPC) strategy.
- Simulation experiments including mechanical and short circuit faults.
Main Results:
- The designed controller effectively attenuates external interference.
- Unknown system parameters are successfully estimated.
- Prescribed transient performance for generator rotor angle is achieved.
- Simulation results demonstrate the controller's feasibility and effectiveness under fault conditions.
Conclusions:
- The proposed adaptive robust controller enhances the robustness and performance of excitation systems.
- The combination of H∞ theory and PPC offers a viable solution for complex power system control.
- The controller's effectiveness is validated through comprehensive fault simulations.
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