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International journal of electrical power & energy systems v.99, 2018년, pp.682 - 694   SCIE
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Robust sensor fault detection and isolation scheme for interconnected smart power systems in presence of RER and EVs using unknown input observer

Haes Alhelou, H. (Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran ) ; Hamedani Golshan, M.E. (Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran ) ; Askari-Marnani, J. (Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran ) ;
  • 초록  

    Abstract Correct measurement of variables used in frequency control of power system is crucial for power system operation, stability, and security. Once sensor fault is occurred in power system, the faulty sensor should be instantly isolated. To this end, a model-based fault detection and isolation (FDI) technique is adopted in this paper. The proposed sensor FDI scheme for complex power systems is built based on unknown input observer (UIO) which is robust for systems with unknown inputs. The load fluctuation and output power variation of renewable energy resources are modeled as unknown inputs of power systems. To show the effectiveness of the proposed schemes in case of future smart grids, the studied power system is developed to combine both electric vehicles (EVs) and high penetration level of renewable energy resources. The simulation scenarios are carried out for an eleven-order dynamical multi-area smart power system. The robustness of using UIO to detect and isolate sensor faults in power system is proved by several simulation scenarios. Likewise, the simulation results show that isolation of faulty sensors can be guaranteed by proper selection of the measured variables in the state space model of the studied system.


  • 주제어

    Smart grids .   Electric vehicles .   Faulty sensors .   Fault detection and isolation .   Power system monitoring and control.  

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