Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Generation Rescheduling Based on Energy Margin Sensitivity for Transient Stability Enhancement

  • Kim, Kyu-Ho (Dept. of Electrical Engineering, Hankyong University) ;
  • Rhee, Sang-Bong (Dept. of Electrical Engineering, Yeungnam University) ;
  • Hwang, Kab-Ju (Dept. of Electrical Engineering, University of Ulsan) ;
  • Song, Kyung-Bin (Dept. of Electrical Engineering, Soongsil University) ;
  • Lee, Kwang Y. (Dept. of Electrical and Computer Engineering, Baylor University)
  • Received : 2014.12.13
  • Accepted : 2015.09.07
  • Published : 2016.01.01
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Abstract

This paper presents a generation rescheduling method for the enhancement of transient stability in power systems. The priority and the candidate generators for rescheduling are calculated by using the energy margin sensitivity. The generation rescheduling formulates the Lagrangian function with the fuel cost and emission such as NOx and SOx from power plants. The generation rescheduling searches for the solution that minimizes the Lagrangian function by using the Newton’s approach. While the Pareto optimum in the fuel cost and emission minimization has a drawback of finding a number of non-dominated solutions, the proposed approach can explore the non-inferior solutions of the multiobjective optimization problem more efficiently. The method proposed is applied to a 4-machine 6-bus system to demonstrate its effectiveness.

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