LAUSR

Abstract This paper aims to conduct the risk assessment of transmission network based on the search of cascading failure chains. Regarding the generalized cascading failure model with transient stability constraints, some significant improvements including the subsequent failure search strategy and the system control measures are proposed during analysis. Besides, the risk evaluation indices pertinent to the failure chains combined with the actual engineering requirements, and the failure level classification are elaborately derived and discussed. Finally, case studies are performed on a real-sized Chinese power grid to illustrate the validity of the proposed strategies and methods.