A FLEXIBLE NODE ALGORITHM FOR CRITICAL VOLTAGE COLLPASE POWER FLOW IN POWER SYSTEM

To the problem of voltage collapse in power system, the load critical voltage collapse power flow (CVCPF) algorithm in power system with power mode load is discussed under the load critical voltage collapse power flow analysis in this paper. Furthermore, the flexible node power flow algorithm for load voltage critical collapse in power system, which provides a quantitative calculation method for operational zone boundary analysis in large scale power system, is created by the procedure which includes using the characteristics of critical collapse power flow of alternating current circuit, evading collapse branch, setting equivalent flexible node, and processing flexible equality constrain condition, etc. The proposed algorithm has been tested and achieved a very good performance on an IEEE 5-bus sample system.