Abstract
This paper is focused on solving the problems of fault estimation and fault-tolerant control for multiarea power systems with sensor failures. First, the estimations of the system states and fault vectors are determined using an improved sliding-mode observer technique. Moreover, a derivative gain and a proportional gain are introduced to design the resultant sliding-mode observer more freely, and a discontinuous input is given to reduce the impact of sensor faults and aggregated uncertainties. Then, based on the obtained state estimates, an integral-type sliding-mode control scheme against faults and disturbances is proposed to ensure that the resultant fault system is asymptotically stable, from which each subsystem states in the multiarea power system can be driven onto the designed sliding-mode surfaces in both the state estimation and error estimation spaces. Finally, a three-area power system is simulated to validate the feasibility of the developed fault-tolerant control scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 38-47 |
| Number of pages | 10 |
| Journal | IEEE/ASME Transactions on Mechatronics |
| Volume | 23 |
| Issue number | 1 |
| Early online date | 21 Jun 2017 |
| DOIs | |
| Publication status | Published - Feb 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Funding
This work was supported in part by the National Natural Science Foundation of China under Grant 61403048 and Grant 61772095; in part by the Natural Science Foundation of Chongqing, China, under Grant cstc2015jcyjA40005; in part by the Fundamental Research Funds for the Central Universities under Grant 106112016CDJZR175509; and in part by the Science and Technology Commission of Chongqing, China, under Grant cstc2014kjrc-qnrc70003.
Keywords
- Fault-tolerant control (FTC)
- load frequency control (LFC)
- multiarea power systems
- sliding-mode observer (SMO)