Chapter 24

Group-Based BCU Method

24.1 INTRODUCTION

An integrated group-based BCU method will be presented in this chapter. This integrated method is composed of the BCU method, the group-based verification scheme, the group-based BCU–exit point method, and the group-based BCU–CUEP method described in the previous chapters. Compared to the BCU method, the integrated group-based BCU method has the following features:

  • The one-parameter transversality condition is not required.
  • The boundary property is not required.
  • The group-based BCU method computes the correct controlling unstable equilibrium point (controlling UEP, or CUEP) for each contingency.
  • The group-based BCU method ensures the reliability and accuracy of the calculated critical energy.
  • The group-based BCU method reduces the conservativeness of the BCU method.
  • The group-based BCU method captures and explores the inherent characteristics of coherent contingencies. It reduces a large number of the contingencies whose corresponding UEP boundary property needs to be checked to a small number.
  • Given a contingency list, an outstanding feature of the group-based BCU method is that it offers an effective means of controller design development for transient stability enhancement.
  • The group-based BCU method offers useful information regarding the impact of system damping on the region of power system transient stability and on the energy margin.

Two versions of the group-based BCU method will be presented in this chapter. One version is designed ...

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