, Volume 18, Issue 5, pp 787-799

First online:

A structure-preserving energy function for stability analysis of AC/DC systems

  • K R PadiyarAffiliated withDepartment of Electrical Engineering, Indian Institute of Science
  • , H S Y SastryAffiliated withKarnataka Regional Engineering College

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Direct stability analysis ofAC/DC power systems using a structure-preserving energy function (SPEF) is proposed in this paper. The system model considered retains the load buses thereby enabling the representation of nonlinear voltage dependent loads. TheHVDC system is represented with the same degree of detail as is normally done in transient stability simulation. The converter controllers can be represented by simplified or detailed models. Two or multi-terminalDC systems can be considered. The stability analysis is illustrated with a 3-machine system example and encouraging results have been obtained.


Direct stability analysis structure-preserving energy function nonlinear voltage dependent loads