KIEE International Transactions on Power Engineering

The Korean Institute of Electrical Engineers (대한전기학회)
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A New Approach to HVDC System Control for Damping SSO Using the Novel Eigenvalue Analysis Program

  • Kim, Dong-Joon (Dept. of Electrical Engineering, Chonnam National University) ;
  • Nam, Hae-Kon (Dept. of Electrical Engineering, Chonnam National University) ;
  • Moon, Young-Hwan (Electricity Market Technology Research Group, KERI)
  • Published : 2004.12.01
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Abstract

This paper presents a new approach to HVDC system control for damping subsynchronous oscillation (SSO) involving HVDC converters and turbine generator shaft systems. This requires a novel eigenvalue analysis (NEA) program, derivation of HVDC system modeling considering steady-state conditions and dynamic conditions in the combined AC/DC system, and an appropriate control scheme. The method suggested makes possible the design of a subsynchronous oscillation damping controller (SODC) to provide positive damping torque for the range of torsional modes in combined AC/DC systems. There are three steps involved in the design of a SODC； first the worst torsional mode is determined using the NEA program, next the SODC parameters are designed for the range of that torsional mode, and then finally an off-line simultaneous time domain program such as PSCAD/EMTDC is used to verify the parameters of the SODC. The suggested SODC design method is applied to two AC/DC systems, and its practicality is verified using the PSCAD/EMTDC simulation program.

Keywords

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