单输电通道中输电断面静稳极限的快速估算张文朝.pdf

DOI:10.13335/j.1000-3673.pst.2012.05.038 36 5 Vol. 36 No. 5 2012 5 Power System Technology May 2012 1000-3673201205-0092-04 TM 72 A 470·4051 1 2 2 1 3 2 1 100192 2 071003 3 063000 A Fast Method to Estimate Steady-State Stability Limit of Tie Line in Single Power Transmission Channel 1 2 2 1 3 2 ZHANG Wenchao , HE Yulong , GU Xueping , ZHANG Yanping , LI Yue , LI Jia (1. China Electric Power Research Institute, Haidian District, Beijing 100192, China; 2. School of Electrical Electronic Engineering, North China Electric Power University, Baoding 071003, Hebei Province, China; 3. Tangshan Electric Power Corporation, Tangshan 063000, Hebei Province, China) ABSTRACT: To fast estimate steady-state stability limit of tie lines in interconnected power grid, the equivalent impedance is calculated by short-circuit current, on this basis a method to fast estimate steady-state stability limit of single power transmission channel is proposed. The short-circuit currents of [6] buses at both terminals of tie line and its short-circuit capacity are solved respectively, and based on them an interconnected large-scale power grid is equivalent to a simple two-machine system. To take the influence of excitation system, a modified scheme for terminal voltages of the equiv