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Determination of Reactive Power Compensation Considering Large Disturbances for Power Flow Solvability in the Korean Power System

  • Seo, Sang-Soo (Smart Grid Research Center, Korea Electrotechnology Research Institute) ;
  • Kang, Sang-Gyun (Engineering Research Center, Chonbuk National University) ;
  • Lee, Byong-Jun (Department of Electrical Engineering, Korea University) ;
  • Kim, Tae-Kyun (Power System Analysis Group, Korea Electric Power Research Institute) ;
  • Song, Hwa-Chang (Department of Electrical Engineering, Seoul National University of Technology)
  • Received : 2010.02.02
  • Accepted : 2010.07.10
  • Published : 2011.03.01

Abstract

This paper proposes a methodology using a tool based on the branch-parameter continuation power flow (BCPF) in order to restore the power flow solvability in unsolvable contingencies. A specified contingency from a set of transmission line contingencies is modeled, considering the transient analysis and practice in the Korean power system. This tool traces a solution path that satisfies the power flow equations with respect to the variation of the branch parameter. At a critical point, in which the branch parameter can move on to a maximum value, a sensitivity analysis with a normal vector is performed to identify the most effective compensation. With the sensitivity information, the location of the reactive power compensation is determined and the effectiveness of the sensitivity information is verified to restore the solvability. In the simulation, the proposed framework is then applied to the Korean power system.

Keywords

References

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