Hybridized Continous-Repeated Power Flow (HCR-PF) for Electric Power Transfer Capability Determination

Abstract

The ability to accurately and rapidly assess the capabilities of the transmission grid is a key concept in the restructuring of the electric power industry. This paper presents hybridized Continuation-Repeated Power Flow (HCR-PF) for ATC computation. Results of IEEE 9 bus and IEEE 30 bus test systems were presented and comparisons were made with other methods. HCR-PF is seen to provide a good alternative to determine ATC. Single line outage (N–1) criterion is used to simulate the effect of line outages on ATC values thereby identifying overloaded transmission facility. Network response method for results interpretation of ATC is considered appropriate since it takes into consideration the response of the entire network to a given transfer direction. Although any limitation may be considered independently for simulation purposes, in practice any of the limiting constraints can be the most severe, depending on system base case and steady state variables.