Simplification, expansion and enhancement of direct interior point algorithm for power system maximum loadability

Power system maximum loadability is a crucial index. The direct interior po int algorithm was introduced by several researchers to calculate power syst em maximum loadability This paper simplifies the direct interior point mode l and applies it to various optimization problems. Zone-based maximum loada bility problems are discussed. Weight factors and tie line flows are includ ed. ATC (Available Transfer Capability) calculation is also investigated. T he meaning and applications of "shadow price" are explained and shown. The principle of oscillation For this algorithm is explained. The factors that influence the algorithm's speed and convergence are investigated. Our resea rch proves the interior point algorithm is a powerful tool that can handle various kinds of maximum loadability problems.