| Abstract: | A system damping resistor (SDR), which is a type of stabilizing equipment, is especially effective in decelerating the first synchronous generators' acceleration. An adjustable speed flywheel generator (FWG) is effective not only in decelerating the first acceleration but also in improving the dynamic stability. We have studied the combined effect of the SDR and FWG for a model network with a large‐capacity long‐distance transmission system. It has two types of instability mode. One is immediate step‐out type by unbalanced fault such as same‐phase 1LG‐OC (1 Φ2LG‐OC). The other is dynamic unstable type by balanced fault such as 3LG‐O. We found that SDR–FWG combination using proper control method has the effect of decreasing total capacity, yielding economical advantages. © 2001 Scripta Technica, Electr Eng Jpn, 138(3): 52–62, 2002 |
