Asynchronous Switched Event-Triggered Load Frequency Control in Multi-Area Power Systems with Stochastic Actuator Failures

EasyChair Preprint 10672

Abstract

Stochastic actuator failures caused by such as spring aging or hydraulic leakage may result in random switches among different operating modes of the load frequency control (LFC) system, posing a serious challenge to the frequency stability of multi-area power systems. Thereby, an asynchronous switched adaptive event-triggered LFC strategy is investigated in this paper. A series of operating scenarios are firstly preset according to the actuator failure severities. Then the event-triggered control (ETC) parameters containing controller and event-triggered detector (ETD) which corresponds to each faulty scenario are designed to stabilize the LFC system with a low network bandwidth occupancy. Fully considering that the controller and ETD cannot be simultaneously adjusted due to the existence of communication network, design constraints and update criteria of ETC parameters are strictly derived to guarantee exponential stability when the LFC system switches among different faulty scenarios. Finally, the effectiveness of the proposed method has been verified by conducting a series of simulations.

Keyphrases: Event-triggered control, Load Frequency Control, actuator failure, asynchronous switched control, multi-area power system

@booklet{EasyChair:10672,
  author    = {Yajian Zhang and Jiafang Zhang and Chen Peng and Fei Xue},
  title     = {Asynchronous Switched Event-Triggered Load Frequency Control in Multi-Area Power Systems with Stochastic Actuator Failures},
  howpublished = {EasyChair Preprint 10672},
  year      = {EasyChair, 2023}}